| /* |
| * Copyright (C) 2006 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package android.view; |
| |
| import android.util.FloatProperty; |
| import android.util.LocaleUtil; |
| import android.util.Property; |
| import com.android.internal.R; |
| import com.android.internal.util.Predicate; |
| import com.android.internal.view.menu.MenuBuilder; |
| |
| import android.content.ClipData; |
| import android.content.Context; |
| import android.content.res.Configuration; |
| import android.content.res.Resources; |
| import android.content.res.TypedArray; |
| import android.graphics.Bitmap; |
| import android.graphics.Camera; |
| import android.graphics.Canvas; |
| import android.graphics.Interpolator; |
| import android.graphics.LinearGradient; |
| import android.graphics.Matrix; |
| import android.graphics.Paint; |
| import android.graphics.PixelFormat; |
| import android.graphics.Point; |
| import android.graphics.PorterDuff; |
| import android.graphics.PorterDuffXfermode; |
| import android.graphics.Rect; |
| import android.graphics.RectF; |
| import android.graphics.Region; |
| import android.graphics.Shader; |
| import android.graphics.drawable.ColorDrawable; |
| import android.graphics.drawable.Drawable; |
| import android.os.Handler; |
| import android.os.IBinder; |
| import android.os.Message; |
| import android.os.Parcel; |
| import android.os.Parcelable; |
| import android.os.RemoteException; |
| import android.os.SystemClock; |
| import android.util.AttributeSet; |
| import android.util.Log; |
| import android.util.Pool; |
| import android.util.Poolable; |
| import android.util.PoolableManager; |
| import android.util.Pools; |
| import android.util.SparseArray; |
| import android.util.TypedValue; |
| import android.view.ContextMenu.ContextMenuInfo; |
| import android.view.accessibility.AccessibilityEvent; |
| import android.view.accessibility.AccessibilityEventSource; |
| import android.view.accessibility.AccessibilityManager; |
| import android.view.accessibility.AccessibilityNodeInfo; |
| import android.view.animation.Animation; |
| import android.view.animation.AnimationUtils; |
| import android.view.inputmethod.EditorInfo; |
| import android.view.inputmethod.InputConnection; |
| import android.view.inputmethod.InputMethodManager; |
| import android.widget.ScrollBarDrawable; |
| |
| import java.lang.ref.WeakReference; |
| import java.lang.reflect.InvocationTargetException; |
| import java.lang.reflect.Method; |
| import java.util.ArrayList; |
| import java.util.Arrays; |
| import java.util.Locale; |
| import java.util.WeakHashMap; |
| import java.util.concurrent.CopyOnWriteArrayList; |
| |
| /** |
| * <p> |
| * This class represents the basic building block for user interface components. A View |
| * occupies a rectangular area on the screen and is responsible for drawing and |
| * event handling. View is the base class for <em>widgets</em>, which are |
| * used to create interactive UI components (buttons, text fields, etc.). The |
| * {@link android.view.ViewGroup} subclass is the base class for <em>layouts</em>, which |
| * are invisible containers that hold other Views (or other ViewGroups) and define |
| * their layout properties. |
| * </p> |
| * |
| * <div class="special"> |
| * <p>For an introduction to using this class to develop your |
| * application's user interface, read the Developer Guide documentation on |
| * <strong><a href="{@docRoot}guide/topics/ui/index.html">User Interface</a></strong>. Special topics |
| * include: |
| * <br/><a href="{@docRoot}guide/topics/ui/declaring-layout.html">Declaring Layout</a> |
| * <br/><a href="{@docRoot}guide/topics/ui/menus.html">Creating Menus</a> |
| * <br/><a href="{@docRoot}guide/topics/ui/layout-objects.html">Common Layout Objects</a> |
| * <br/><a href="{@docRoot}guide/topics/ui/binding.html">Binding to Data with AdapterView</a> |
| * <br/><a href="{@docRoot}guide/topics/ui/ui-events.html">Handling UI Events</a> |
| * <br/><a href="{@docRoot}guide/topics/ui/themes.html">Applying Styles and Themes</a> |
| * <br/><a href="{@docRoot}guide/topics/ui/custom-components.html">Building Custom Components</a> |
| * <br/><a href="{@docRoot}guide/topics/ui/how-android-draws.html">How Android Draws Views</a>. |
| * </p> |
| * </div> |
| * |
| * <a name="Using"></a> |
| * <h3>Using Views</h3> |
| * <p> |
| * All of the views in a window are arranged in a single tree. You can add views |
| * either from code or by specifying a tree of views in one or more XML layout |
| * files. There are many specialized subclasses of views that act as controls or |
| * are capable of displaying text, images, or other content. |
| * </p> |
| * <p> |
| * Once you have created a tree of views, there are typically a few types of |
| * common operations you may wish to perform: |
| * <ul> |
| * <li><strong>Set properties:</strong> for example setting the text of a |
| * {@link android.widget.TextView}. The available properties and the methods |
| * that set them will vary among the different subclasses of views. Note that |
| * properties that are known at build time can be set in the XML layout |
| * files.</li> |
| * <li><strong>Set focus:</strong> The framework will handled moving focus in |
| * response to user input. To force focus to a specific view, call |
| * {@link #requestFocus}.</li> |
| * <li><strong>Set up listeners:</strong> Views allow clients to set listeners |
| * that will be notified when something interesting happens to the view. For |
| * example, all views will let you set a listener to be notified when the view |
| * gains or loses focus. You can register such a listener using |
| * {@link #setOnFocusChangeListener(android.view.View.OnFocusChangeListener)}. |
| * Other view subclasses offer more specialized listeners. For example, a Button |
| * exposes a listener to notify clients when the button is clicked.</li> |
| * <li><strong>Set visibility:</strong> You can hide or show views using |
| * {@link #setVisibility(int)}.</li> |
| * </ul> |
| * </p> |
| * <p><em> |
| * Note: The Android framework is responsible for measuring, laying out and |
| * drawing views. You should not call methods that perform these actions on |
| * views yourself unless you are actually implementing a |
| * {@link android.view.ViewGroup}. |
| * </em></p> |
| * |
| * <a name="Lifecycle"></a> |
| * <h3>Implementing a Custom View</h3> |
| * |
| * <p> |
| * To implement a custom view, you will usually begin by providing overrides for |
| * some of the standard methods that the framework calls on all views. You do |
| * not need to override all of these methods. In fact, you can start by just |
| * overriding {@link #onDraw(android.graphics.Canvas)}. |
| * <table border="2" width="85%" align="center" cellpadding="5"> |
| * <thead> |
| * <tr><th>Category</th> <th>Methods</th> <th>Description</th></tr> |
| * </thead> |
| * |
| * <tbody> |
| * <tr> |
| * <td rowspan="2">Creation</td> |
| * <td>Constructors</td> |
| * <td>There is a form of the constructor that are called when the view |
| * is created from code and a form that is called when the view is |
| * inflated from a layout file. The second form should parse and apply |
| * any attributes defined in the layout file. |
| * </td> |
| * </tr> |
| * <tr> |
| * <td><code>{@link #onFinishInflate()}</code></td> |
| * <td>Called after a view and all of its children has been inflated |
| * from XML.</td> |
| * </tr> |
| * |
| * <tr> |
| * <td rowspan="3">Layout</td> |
| * <td><code>{@link #onMeasure(int, int)}</code></td> |
| * <td>Called to determine the size requirements for this view and all |
| * of its children. |
| * </td> |
| * </tr> |
| * <tr> |
| * <td><code>{@link #onLayout(boolean, int, int, int, int)}</code></td> |
| * <td>Called when this view should assign a size and position to all |
| * of its children. |
| * </td> |
| * </tr> |
| * <tr> |
| * <td><code>{@link #onSizeChanged(int, int, int, int)}</code></td> |
| * <td>Called when the size of this view has changed. |
| * </td> |
| * </tr> |
| * |
| * <tr> |
| * <td>Drawing</td> |
| * <td><code>{@link #onDraw(android.graphics.Canvas)}</code></td> |
| * <td>Called when the view should render its content. |
| * </td> |
| * </tr> |
| * |
| * <tr> |
| * <td rowspan="4">Event processing</td> |
| * <td><code>{@link #onKeyDown(int, KeyEvent)}</code></td> |
| * <td>Called when a new key event occurs. |
| * </td> |
| * </tr> |
| * <tr> |
| * <td><code>{@link #onKeyUp(int, KeyEvent)}</code></td> |
| * <td>Called when a key up event occurs. |
| * </td> |
| * </tr> |
| * <tr> |
| * <td><code>{@link #onTrackballEvent(MotionEvent)}</code></td> |
| * <td>Called when a trackball motion event occurs. |
| * </td> |
| * </tr> |
| * <tr> |
| * <td><code>{@link #onTouchEvent(MotionEvent)}</code></td> |
| * <td>Called when a touch screen motion event occurs. |
| * </td> |
| * </tr> |
| * |
| * <tr> |
| * <td rowspan="2">Focus</td> |
| * <td><code>{@link #onFocusChanged(boolean, int, android.graphics.Rect)}</code></td> |
| * <td>Called when the view gains or loses focus. |
| * </td> |
| * </tr> |
| * |
| * <tr> |
| * <td><code>{@link #onWindowFocusChanged(boolean)}</code></td> |
| * <td>Called when the window containing the view gains or loses focus. |
| * </td> |
| * </tr> |
| * |
| * <tr> |
| * <td rowspan="3">Attaching</td> |
| * <td><code>{@link #onAttachedToWindow()}</code></td> |
| * <td>Called when the view is attached to a window. |
| * </td> |
| * </tr> |
| * |
| * <tr> |
| * <td><code>{@link #onDetachedFromWindow}</code></td> |
| * <td>Called when the view is detached from its window. |
| * </td> |
| * </tr> |
| * |
| * <tr> |
| * <td><code>{@link #onWindowVisibilityChanged(int)}</code></td> |
| * <td>Called when the visibility of the window containing the view |
| * has changed. |
| * </td> |
| * </tr> |
| * </tbody> |
| * |
| * </table> |
| * </p> |
| * |
| * <a name="IDs"></a> |
| * <h3>IDs</h3> |
| * Views may have an integer id associated with them. These ids are typically |
| * assigned in the layout XML files, and are used to find specific views within |
| * the view tree. A common pattern is to: |
| * <ul> |
| * <li>Define a Button in the layout file and assign it a unique ID. |
| * <pre> |
| * <Button |
| * android:id="@+id/my_button" |
| * android:layout_width="wrap_content" |
| * android:layout_height="wrap_content" |
| * android:text="@string/my_button_text"/> |
| * </pre></li> |
| * <li>From the onCreate method of an Activity, find the Button |
| * <pre class="prettyprint"> |
| * Button myButton = (Button) findViewById(R.id.my_button); |
| * </pre></li> |
| * </ul> |
| * <p> |
| * View IDs need not be unique throughout the tree, but it is good practice to |
| * ensure that they are at least unique within the part of the tree you are |
| * searching. |
| * </p> |
| * |
| * <a name="Position"></a> |
| * <h3>Position</h3> |
| * <p> |
| * The geometry of a view is that of a rectangle. A view has a location, |
| * expressed as a pair of <em>left</em> and <em>top</em> coordinates, and |
| * two dimensions, expressed as a width and a height. The unit for location |
| * and dimensions is the pixel. |
| * </p> |
| * |
| * <p> |
| * It is possible to retrieve the location of a view by invoking the methods |
| * {@link #getLeft()} and {@link #getTop()}. The former returns the left, or X, |
| * coordinate of the rectangle representing the view. The latter returns the |
| * top, or Y, coordinate of the rectangle representing the view. These methods |
| * both return the location of the view relative to its parent. For instance, |
| * when getLeft() returns 20, that means the view is located 20 pixels to the |
| * right of the left edge of its direct parent. |
| * </p> |
| * |
| * <p> |
| * In addition, several convenience methods are offered to avoid unnecessary |
| * computations, namely {@link #getRight()} and {@link #getBottom()}. |
| * These methods return the coordinates of the right and bottom edges of the |
| * rectangle representing the view. For instance, calling {@link #getRight()} |
| * is similar to the following computation: <code>getLeft() + getWidth()</code> |
| * (see <a href="#SizePaddingMargins">Size</a> for more information about the width.) |
| * </p> |
| * |
| * <a name="SizePaddingMargins"></a> |
| * <h3>Size, padding and margins</h3> |
| * <p> |
| * The size of a view is expressed with a width and a height. A view actually |
| * possess two pairs of width and height values. |
| * </p> |
| * |
| * <p> |
| * The first pair is known as <em>measured width</em> and |
| * <em>measured height</em>. These dimensions define how big a view wants to be |
| * within its parent (see <a href="#Layout">Layout</a> for more details.) The |
| * measured dimensions can be obtained by calling {@link #getMeasuredWidth()} |
| * and {@link #getMeasuredHeight()}. |
| * </p> |
| * |
| * <p> |
| * The second pair is simply known as <em>width</em> and <em>height</em>, or |
| * sometimes <em>drawing width</em> and <em>drawing height</em>. These |
| * dimensions define the actual size of the view on screen, at drawing time and |
| * after layout. These values may, but do not have to, be different from the |
| * measured width and height. The width and height can be obtained by calling |
| * {@link #getWidth()} and {@link #getHeight()}. |
| * </p> |
| * |
| * <p> |
| * To measure its dimensions, a view takes into account its padding. The padding |
| * is expressed in pixels for the left, top, right and bottom parts of the view. |
| * Padding can be used to offset the content of the view by a specific amount of |
| * pixels. For instance, a left padding of 2 will push the view's content by |
| * 2 pixels to the right of the left edge. Padding can be set using the |
| * {@link #setPadding(int, int, int, int)} method and queried by calling |
| * {@link #getPaddingLeft()}, {@link #getPaddingTop()}, |
| * {@link #getPaddingRight()}, {@link #getPaddingBottom()}. |
| * </p> |
| * |
| * <p> |
| * Even though a view can define a padding, it does not provide any support for |
| * margins. However, view groups provide such a support. Refer to |
| * {@link android.view.ViewGroup} and |
| * {@link android.view.ViewGroup.MarginLayoutParams} for further information. |
| * </p> |
| * |
| * <a name="Layout"></a> |
| * <h3>Layout</h3> |
| * <p> |
| * Layout is a two pass process: a measure pass and a layout pass. The measuring |
| * pass is implemented in {@link #measure(int, int)} and is a top-down traversal |
| * of the view tree. Each view pushes dimension specifications down the tree |
| * during the recursion. At the end of the measure pass, every view has stored |
| * its measurements. The second pass happens in |
| * {@link #layout(int,int,int,int)} and is also top-down. During |
| * this pass each parent is responsible for positioning all of its children |
| * using the sizes computed in the measure pass. |
| * </p> |
| * |
| * <p> |
| * When a view's measure() method returns, its {@link #getMeasuredWidth()} and |
| * {@link #getMeasuredHeight()} values must be set, along with those for all of |
| * that view's descendants. A view's measured width and measured height values |
| * must respect the constraints imposed by the view's parents. This guarantees |
| * that at the end of the measure pass, all parents accept all of their |
| * children's measurements. A parent view may call measure() more than once on |
| * its children. For example, the parent may measure each child once with |
| * unspecified dimensions to find out how big they want to be, then call |
| * measure() on them again with actual numbers if the sum of all the children's |
| * unconstrained sizes is too big or too small. |
| * </p> |
| * |
| * <p> |
| * The measure pass uses two classes to communicate dimensions. The |
| * {@link MeasureSpec} class is used by views to tell their parents how they |
| * want to be measured and positioned. The base LayoutParams class just |
| * describes how big the view wants to be for both width and height. For each |
| * dimension, it can specify one of: |
| * <ul> |
| * <li> an exact number |
| * <li>MATCH_PARENT, which means the view wants to be as big as its parent |
| * (minus padding) |
| * <li> WRAP_CONTENT, which means that the view wants to be just big enough to |
| * enclose its content (plus padding). |
| * </ul> |
| * There are subclasses of LayoutParams for different subclasses of ViewGroup. |
| * For example, AbsoluteLayout has its own subclass of LayoutParams which adds |
| * an X and Y value. |
| * </p> |
| * |
| * <p> |
| * MeasureSpecs are used to push requirements down the tree from parent to |
| * child. A MeasureSpec can be in one of three modes: |
| * <ul> |
| * <li>UNSPECIFIED: This is used by a parent to determine the desired dimension |
| * of a child view. For example, a LinearLayout may call measure() on its child |
| * with the height set to UNSPECIFIED and a width of EXACTLY 240 to find out how |
| * tall the child view wants to be given a width of 240 pixels. |
| * <li>EXACTLY: This is used by the parent to impose an exact size on the |
| * child. The child must use this size, and guarantee that all of its |
| * descendants will fit within this size. |
| * <li>AT_MOST: This is used by the parent to impose a maximum size on the |
| * child. The child must gurantee that it and all of its descendants will fit |
| * within this size. |
| * </ul> |
| * </p> |
| * |
| * <p> |
| * To intiate a layout, call {@link #requestLayout}. This method is typically |
| * called by a view on itself when it believes that is can no longer fit within |
| * its current bounds. |
| * </p> |
| * |
| * <a name="Drawing"></a> |
| * <h3>Drawing</h3> |
| * <p> |
| * Drawing is handled by walking the tree and rendering each view that |
| * intersects the the invalid region. Because the tree is traversed in-order, |
| * this means that parents will draw before (i.e., behind) their children, with |
| * siblings drawn in the order they appear in the tree. |
| * If you set a background drawable for a View, then the View will draw it for you |
| * before calling back to its <code>onDraw()</code> method. |
| * </p> |
| * |
| * <p> |
| * Note that the framework will not draw views that are not in the invalid region. |
| * </p> |
| * |
| * <p> |
| * To force a view to draw, call {@link #invalidate()}. |
| * </p> |
| * |
| * <a name="EventHandlingThreading"></a> |
| * <h3>Event Handling and Threading</h3> |
| * <p> |
| * The basic cycle of a view is as follows: |
| * <ol> |
| * <li>An event comes in and is dispatched to the appropriate view. The view |
| * handles the event and notifies any listeners.</li> |
| * <li>If in the course of processing the event, the view's bounds may need |
| * to be changed, the view will call {@link #requestLayout()}.</li> |
| * <li>Similarly, if in the course of processing the event the view's appearance |
| * may need to be changed, the view will call {@link #invalidate()}.</li> |
| * <li>If either {@link #requestLayout()} or {@link #invalidate()} were called, |
| * the framework will take care of measuring, laying out, and drawing the tree |
| * as appropriate.</li> |
| * </ol> |
| * </p> |
| * |
| * <p><em>Note: The entire view tree is single threaded. You must always be on |
| * the UI thread when calling any method on any view.</em> |
| * If you are doing work on other threads and want to update the state of a view |
| * from that thread, you should use a {@link Handler}. |
| * </p> |
| * |
| * <a name="FocusHandling"></a> |
| * <h3>Focus Handling</h3> |
| * <p> |
| * The framework will handle routine focus movement in response to user input. |
| * This includes changing the focus as views are removed or hidden, or as new |
| * views become available. Views indicate their willingness to take focus |
| * through the {@link #isFocusable} method. To change whether a view can take |
| * focus, call {@link #setFocusable(boolean)}. When in touch mode (see notes below) |
| * views indicate whether they still would like focus via {@link #isFocusableInTouchMode} |
| * and can change this via {@link #setFocusableInTouchMode(boolean)}. |
| * </p> |
| * <p> |
| * Focus movement is based on an algorithm which finds the nearest neighbor in a |
| * given direction. In rare cases, the default algorithm may not match the |
| * intended behavior of the developer. In these situations, you can provide |
| * explicit overrides by using these XML attributes in the layout file: |
| * <pre> |
| * nextFocusDown |
| * nextFocusLeft |
| * nextFocusRight |
| * nextFocusUp |
| * </pre> |
| * </p> |
| * |
| * |
| * <p> |
| * To get a particular view to take focus, call {@link #requestFocus()}. |
| * </p> |
| * |
| * <a name="TouchMode"></a> |
| * <h3>Touch Mode</h3> |
| * <p> |
| * When a user is navigating a user interface via directional keys such as a D-pad, it is |
| * necessary to give focus to actionable items such as buttons so the user can see |
| * what will take input. If the device has touch capabilities, however, and the user |
| * begins interacting with the interface by touching it, it is no longer necessary to |
| * always highlight, or give focus to, a particular view. This motivates a mode |
| * for interaction named 'touch mode'. |
| * </p> |
| * <p> |
| * For a touch capable device, once the user touches the screen, the device |
| * will enter touch mode. From this point onward, only views for which |
| * {@link #isFocusableInTouchMode} is true will be focusable, such as text editing widgets. |
| * Other views that are touchable, like buttons, will not take focus when touched; they will |
| * only fire the on click listeners. |
| * </p> |
| * <p> |
| * Any time a user hits a directional key, such as a D-pad direction, the view device will |
| * exit touch mode, and find a view to take focus, so that the user may resume interacting |
| * with the user interface without touching the screen again. |
| * </p> |
| * <p> |
| * The touch mode state is maintained across {@link android.app.Activity}s. Call |
| * {@link #isInTouchMode} to see whether the device is currently in touch mode. |
| * </p> |
| * |
| * <a name="Scrolling"></a> |
| * <h3>Scrolling</h3> |
| * <p> |
| * The framework provides basic support for views that wish to internally |
| * scroll their content. This includes keeping track of the X and Y scroll |
| * offset as well as mechanisms for drawing scrollbars. See |
| * {@link #scrollBy(int, int)}, {@link #scrollTo(int, int)}, and |
| * {@link #awakenScrollBars()} for more details. |
| * </p> |
| * |
| * <a name="Tags"></a> |
| * <h3>Tags</h3> |
| * <p> |
| * Unlike IDs, tags are not used to identify views. Tags are essentially an |
| * extra piece of information that can be associated with a view. They are most |
| * often used as a convenience to store data related to views in the views |
| * themselves rather than by putting them in a separate structure. |
| * </p> |
| * |
| * <a name="Animation"></a> |
| * <h3>Animation</h3> |
| * <p> |
| * You can attach an {@link Animation} object to a view using |
| * {@link #setAnimation(Animation)} or |
| * {@link #startAnimation(Animation)}. The animation can alter the scale, |
| * rotation, translation and alpha of a view over time. If the animation is |
| * attached to a view that has children, the animation will affect the entire |
| * subtree rooted by that node. When an animation is started, the framework will |
| * take care of redrawing the appropriate views until the animation completes. |
| * </p> |
| * <p> |
| * Starting with Android 3.0, the preferred way of animating views is to use the |
| * {@link android.animation} package APIs. |
| * </p> |
| * |
| * <a name="Security"></a> |
| * <h3>Security</h3> |
| * <p> |
| * Sometimes it is essential that an application be able to verify that an action |
| * is being performed with the full knowledge and consent of the user, such as |
| * granting a permission request, making a purchase or clicking on an advertisement. |
| * Unfortunately, a malicious application could try to spoof the user into |
| * performing these actions, unaware, by concealing the intended purpose of the view. |
| * As a remedy, the framework offers a touch filtering mechanism that can be used to |
| * improve the security of views that provide access to sensitive functionality. |
| * </p><p> |
| * To enable touch filtering, call {@link #setFilterTouchesWhenObscured(boolean)} or set the |
| * android:filterTouchesWhenObscured layout attribute to true. When enabled, the framework |
| * will discard touches that are received whenever the view's window is obscured by |
| * another visible window. As a result, the view will not receive touches whenever a |
| * toast, dialog or other window appears above the view's window. |
| * </p><p> |
| * For more fine-grained control over security, consider overriding the |
| * {@link #onFilterTouchEventForSecurity(MotionEvent)} method to implement your own |
| * security policy. See also {@link MotionEvent#FLAG_WINDOW_IS_OBSCURED}. |
| * </p> |
| * |
| * @attr ref android.R.styleable#View_alpha |
| * @attr ref android.R.styleable#View_background |
| * @attr ref android.R.styleable#View_clickable |
| * @attr ref android.R.styleable#View_contentDescription |
| * @attr ref android.R.styleable#View_drawingCacheQuality |
| * @attr ref android.R.styleable#View_duplicateParentState |
| * @attr ref android.R.styleable#View_id |
| * @attr ref android.R.styleable#View_fadingEdge |
| * @attr ref android.R.styleable#View_fadingEdgeLength |
| * @attr ref android.R.styleable#View_filterTouchesWhenObscured |
| * @attr ref android.R.styleable#View_fitsSystemWindows |
| * @attr ref android.R.styleable#View_isScrollContainer |
| * @attr ref android.R.styleable#View_focusable |
| * @attr ref android.R.styleable#View_focusableInTouchMode |
| * @attr ref android.R.styleable#View_hapticFeedbackEnabled |
| * @attr ref android.R.styleable#View_keepScreenOn |
| * @attr ref android.R.styleable#View_layerType |
| * @attr ref android.R.styleable#View_longClickable |
| * @attr ref android.R.styleable#View_minHeight |
| * @attr ref android.R.styleable#View_minWidth |
| * @attr ref android.R.styleable#View_nextFocusDown |
| * @attr ref android.R.styleable#View_nextFocusLeft |
| * @attr ref android.R.styleable#View_nextFocusRight |
| * @attr ref android.R.styleable#View_nextFocusUp |
| * @attr ref android.R.styleable#View_onClick |
| * @attr ref android.R.styleable#View_padding |
| * @attr ref android.R.styleable#View_paddingBottom |
| * @attr ref android.R.styleable#View_paddingLeft |
| * @attr ref android.R.styleable#View_paddingRight |
| * @attr ref android.R.styleable#View_paddingTop |
| * @attr ref android.R.styleable#View_paddingStart |
| * @attr ref android.R.styleable#View_paddingEnd |
| * @attr ref android.R.styleable#View_saveEnabled |
| * @attr ref android.R.styleable#View_rotation |
| * @attr ref android.R.styleable#View_rotationX |
| * @attr ref android.R.styleable#View_rotationY |
| * @attr ref android.R.styleable#View_scaleX |
| * @attr ref android.R.styleable#View_scaleY |
| * @attr ref android.R.styleable#View_scrollX |
| * @attr ref android.R.styleable#View_scrollY |
| * @attr ref android.R.styleable#View_scrollbarSize |
| * @attr ref android.R.styleable#View_scrollbarStyle |
| * @attr ref android.R.styleable#View_scrollbars |
| * @attr ref android.R.styleable#View_scrollbarDefaultDelayBeforeFade |
| * @attr ref android.R.styleable#View_scrollbarFadeDuration |
| * @attr ref android.R.styleable#View_scrollbarTrackHorizontal |
| * @attr ref android.R.styleable#View_scrollbarThumbHorizontal |
| * @attr ref android.R.styleable#View_scrollbarThumbVertical |
| * @attr ref android.R.styleable#View_scrollbarTrackVertical |
| * @attr ref android.R.styleable#View_scrollbarAlwaysDrawHorizontalTrack |
| * @attr ref android.R.styleable#View_scrollbarAlwaysDrawVerticalTrack |
| * @attr ref android.R.styleable#View_soundEffectsEnabled |
| * @attr ref android.R.styleable#View_tag |
| * @attr ref android.R.styleable#View_transformPivotX |
| * @attr ref android.R.styleable#View_transformPivotY |
| * @attr ref android.R.styleable#View_translationX |
| * @attr ref android.R.styleable#View_translationY |
| * @attr ref android.R.styleable#View_visibility |
| * |
| * @see android.view.ViewGroup |
| */ |
| public class View implements Drawable.Callback2, KeyEvent.Callback, AccessibilityEventSource { |
| private static final boolean DBG = false; |
| |
| /** |
| * The logging tag used by this class with android.util.Log. |
| */ |
| protected static final String VIEW_LOG_TAG = "View"; |
| |
| /** |
| * Used to mark a View that has no ID. |
| */ |
| public static final int NO_ID = -1; |
| |
| /** |
| * This view does not want keystrokes. Use with TAKES_FOCUS_MASK when |
| * calling setFlags. |
| */ |
| private static final int NOT_FOCUSABLE = 0x00000000; |
| |
| /** |
| * This view wants keystrokes. Use with TAKES_FOCUS_MASK when calling |
| * setFlags. |
| */ |
| private static final int FOCUSABLE = 0x00000001; |
| |
| /** |
| * Mask for use with setFlags indicating bits used for focus. |
| */ |
| private static final int FOCUSABLE_MASK = 0x00000001; |
| |
| /** |
| * This view will adjust its padding to fit sytem windows (e.g. status bar) |
| */ |
| private static final int FITS_SYSTEM_WINDOWS = 0x00000002; |
| |
| /** |
| * This view is visible. Use with {@link #setVisibility(int)}. |
| */ |
| public static final int VISIBLE = 0x00000000; |
| |
| /** |
| * This view is invisible, but it still takes up space for layout purposes. |
| * Use with {@link #setVisibility(int)}. |
| */ |
| public static final int INVISIBLE = 0x00000004; |
| |
| /** |
| * This view is invisible, and it doesn't take any space for layout |
| * purposes. Use with {@link #setVisibility(int)}. |
| */ |
| public static final int GONE = 0x00000008; |
| |
| /** |
| * Mask for use with setFlags indicating bits used for visibility. |
| * {@hide} |
| */ |
| static final int VISIBILITY_MASK = 0x0000000C; |
| |
| private static final int[] VISIBILITY_FLAGS = {VISIBLE, INVISIBLE, GONE}; |
| |
| /** |
| * This view is enabled. Intrepretation varies by subclass. |
| * Use with ENABLED_MASK when calling setFlags. |
| * {@hide} |
| */ |
| static final int ENABLED = 0x00000000; |
| |
| /** |
| * This view is disabled. Intrepretation varies by subclass. |
| * Use with ENABLED_MASK when calling setFlags. |
| * {@hide} |
| */ |
| static final int DISABLED = 0x00000020; |
| |
| /** |
| * Mask for use with setFlags indicating bits used for indicating whether |
| * this view is enabled |
| * {@hide} |
| */ |
| static final int ENABLED_MASK = 0x00000020; |
| |
| /** |
| * This view won't draw. {@link #onDraw(android.graphics.Canvas)} won't be |
| * called and further optimizations will be performed. It is okay to have |
| * this flag set and a background. Use with DRAW_MASK when calling setFlags. |
| * {@hide} |
| */ |
| static final int WILL_NOT_DRAW = 0x00000080; |
| |
| /** |
| * Mask for use with setFlags indicating bits used for indicating whether |
| * this view is will draw |
| * {@hide} |
| */ |
| static final int DRAW_MASK = 0x00000080; |
| |
| /** |
| * <p>This view doesn't show scrollbars.</p> |
| * {@hide} |
| */ |
| static final int SCROLLBARS_NONE = 0x00000000; |
| |
| /** |
| * <p>This view shows horizontal scrollbars.</p> |
| * {@hide} |
| */ |
| static final int SCROLLBARS_HORIZONTAL = 0x00000100; |
| |
| /** |
| * <p>This view shows vertical scrollbars.</p> |
| * {@hide} |
| */ |
| static final int SCROLLBARS_VERTICAL = 0x00000200; |
| |
| /** |
| * <p>Mask for use with setFlags indicating bits used for indicating which |
| * scrollbars are enabled.</p> |
| * {@hide} |
| */ |
| static final int SCROLLBARS_MASK = 0x00000300; |
| |
| /** |
| * Indicates that the view should filter touches when its window is obscured. |
| * Refer to the class comments for more information about this security feature. |
| * {@hide} |
| */ |
| static final int FILTER_TOUCHES_WHEN_OBSCURED = 0x00000400; |
| |
| // note flag value 0x00000800 is now available for next flags... |
| |
| /** |
| * <p>This view doesn't show fading edges.</p> |
| * {@hide} |
| */ |
| static final int FADING_EDGE_NONE = 0x00000000; |
| |
| /** |
| * <p>This view shows horizontal fading edges.</p> |
| * {@hide} |
| */ |
| static final int FADING_EDGE_HORIZONTAL = 0x00001000; |
| |
| /** |
| * <p>This view shows vertical fading edges.</p> |
| * {@hide} |
| */ |
| static final int FADING_EDGE_VERTICAL = 0x00002000; |
| |
| /** |
| * <p>Mask for use with setFlags indicating bits used for indicating which |
| * fading edges are enabled.</p> |
| * {@hide} |
| */ |
| static final int FADING_EDGE_MASK = 0x00003000; |
| |
| /** |
| * <p>Indicates this view can be clicked. When clickable, a View reacts |
| * to clicks by notifying the OnClickListener.<p> |
| * {@hide} |
| */ |
| static final int CLICKABLE = 0x00004000; |
| |
| /** |
| * <p>Indicates this view is caching its drawing into a bitmap.</p> |
| * {@hide} |
| */ |
| static final int DRAWING_CACHE_ENABLED = 0x00008000; |
| |
| /** |
| * <p>Indicates that no icicle should be saved for this view.<p> |
| * {@hide} |
| */ |
| static final int SAVE_DISABLED = 0x000010000; |
| |
| /** |
| * <p>Mask for use with setFlags indicating bits used for the saveEnabled |
| * property.</p> |
| * {@hide} |
| */ |
| static final int SAVE_DISABLED_MASK = 0x000010000; |
| |
| /** |
| * <p>Indicates that no drawing cache should ever be created for this view.<p> |
| * {@hide} |
| */ |
| static final int WILL_NOT_CACHE_DRAWING = 0x000020000; |
| |
| /** |
| * <p>Indicates this view can take / keep focus when int touch mode.</p> |
| * {@hide} |
| */ |
| static final int FOCUSABLE_IN_TOUCH_MODE = 0x00040000; |
| |
| /** |
| * <p>Enables low quality mode for the drawing cache.</p> |
| */ |
| public static final int DRAWING_CACHE_QUALITY_LOW = 0x00080000; |
| |
| /** |
| * <p>Enables high quality mode for the drawing cache.</p> |
| */ |
| public static final int DRAWING_CACHE_QUALITY_HIGH = 0x00100000; |
| |
| /** |
| * <p>Enables automatic quality mode for the drawing cache.</p> |
| */ |
| public static final int DRAWING_CACHE_QUALITY_AUTO = 0x00000000; |
| |
| private static final int[] DRAWING_CACHE_QUALITY_FLAGS = { |
| DRAWING_CACHE_QUALITY_AUTO, DRAWING_CACHE_QUALITY_LOW, DRAWING_CACHE_QUALITY_HIGH |
| }; |
| |
| /** |
| * <p>Mask for use with setFlags indicating bits used for the cache |
| * quality property.</p> |
| * {@hide} |
| */ |
| static final int DRAWING_CACHE_QUALITY_MASK = 0x00180000; |
| |
| /** |
| * <p> |
| * Indicates this view can be long clicked. When long clickable, a View |
| * reacts to long clicks by notifying the OnLongClickListener or showing a |
| * context menu. |
| * </p> |
| * {@hide} |
| */ |
| static final int LONG_CLICKABLE = 0x00200000; |
| |
| /** |
| * <p>Indicates that this view gets its drawable states from its direct parent |
| * and ignores its original internal states.</p> |
| * |
| * @hide |
| */ |
| static final int DUPLICATE_PARENT_STATE = 0x00400000; |
| |
| /** |
| * The scrollbar style to display the scrollbars inside the content area, |
| * without increasing the padding. The scrollbars will be overlaid with |
| * translucency on the view's content. |
| */ |
| public static final int SCROLLBARS_INSIDE_OVERLAY = 0; |
| |
| /** |
| * The scrollbar style to display the scrollbars inside the padded area, |
| * increasing the padding of the view. The scrollbars will not overlap the |
| * content area of the view. |
| */ |
| public static final int SCROLLBARS_INSIDE_INSET = 0x01000000; |
| |
| /** |
| * The scrollbar style to display the scrollbars at the edge of the view, |
| * without increasing the padding. The scrollbars will be overlaid with |
| * translucency. |
| */ |
| public static final int SCROLLBARS_OUTSIDE_OVERLAY = 0x02000000; |
| |
| /** |
| * The scrollbar style to display the scrollbars at the edge of the view, |
| * increasing the padding of the view. The scrollbars will only overlap the |
| * background, if any. |
| */ |
| public static final int SCROLLBARS_OUTSIDE_INSET = 0x03000000; |
| |
| /** |
| * Mask to check if the scrollbar style is overlay or inset. |
| * {@hide} |
| */ |
| static final int SCROLLBARS_INSET_MASK = 0x01000000; |
| |
| /** |
| * Mask to check if the scrollbar style is inside or outside. |
| * {@hide} |
| */ |
| static final int SCROLLBARS_OUTSIDE_MASK = 0x02000000; |
| |
| /** |
| * Mask for scrollbar style. |
| * {@hide} |
| */ |
| static final int SCROLLBARS_STYLE_MASK = 0x03000000; |
| |
| /** |
| * View flag indicating that the screen should remain on while the |
| * window containing this view is visible to the user. This effectively |
| * takes care of automatically setting the WindowManager's |
| * {@link WindowManager.LayoutParams#FLAG_KEEP_SCREEN_ON}. |
| */ |
| public static final int KEEP_SCREEN_ON = 0x04000000; |
| |
| /** |
| * View flag indicating whether this view should have sound effects enabled |
| * for events such as clicking and touching. |
| */ |
| public static final int SOUND_EFFECTS_ENABLED = 0x08000000; |
| |
| /** |
| * View flag indicating whether this view should have haptic feedback |
| * enabled for events such as long presses. |
| */ |
| public static final int HAPTIC_FEEDBACK_ENABLED = 0x10000000; |
| |
| /** |
| * <p>Indicates that the view hierarchy should stop saving state when |
| * it reaches this view. If state saving is initiated immediately at |
| * the view, it will be allowed. |
| * {@hide} |
| */ |
| static final int PARENT_SAVE_DISABLED = 0x20000000; |
| |
| /** |
| * <p>Mask for use with setFlags indicating bits used for PARENT_SAVE_DISABLED.</p> |
| * {@hide} |
| */ |
| static final int PARENT_SAVE_DISABLED_MASK = 0x20000000; |
| |
| /** |
| * Horizontal direction of this view is from Left to Right. |
| * Use with {@link #setLayoutDirection}. |
| * {@hide} |
| */ |
| public static final int LAYOUT_DIRECTION_LTR = 0x00000000; |
| |
| /** |
| * Horizontal direction of this view is from Right to Left. |
| * Use with {@link #setLayoutDirection}. |
| * {@hide} |
| */ |
| public static final int LAYOUT_DIRECTION_RTL = 0x40000000; |
| |
| /** |
| * Horizontal direction of this view is inherited from its parent. |
| * Use with {@link #setLayoutDirection}. |
| * {@hide} |
| */ |
| public static final int LAYOUT_DIRECTION_INHERIT = 0x80000000; |
| |
| /** |
| * Horizontal direction of this view is from deduced from the default language |
| * script for the locale. Use with {@link #setLayoutDirection}. |
| * {@hide} |
| */ |
| public static final int LAYOUT_DIRECTION_LOCALE = 0xC0000000; |
| |
| /** |
| * Mask for use with setFlags indicating bits used for horizontalDirection. |
| * {@hide} |
| */ |
| static final int LAYOUT_DIRECTION_MASK = 0xC0000000; |
| |
| /* |
| * Array of horizontal direction flags for mapping attribute "horizontalDirection" to correct |
| * flag value. |
| * {@hide} |
| */ |
| private static final int[] LAYOUT_DIRECTION_FLAGS = {LAYOUT_DIRECTION_LTR, |
| LAYOUT_DIRECTION_RTL, LAYOUT_DIRECTION_INHERIT, LAYOUT_DIRECTION_LOCALE}; |
| |
| /** |
| * Default horizontalDirection. |
| * {@hide} |
| */ |
| private static final int LAYOUT_DIRECTION_DEFAULT = LAYOUT_DIRECTION_INHERIT; |
| |
| /** |
| * View flag indicating whether {@link #addFocusables(ArrayList, int, int)} |
| * should add all focusable Views regardless if they are focusable in touch mode. |
| */ |
| public static final int FOCUSABLES_ALL = 0x00000000; |
| |
| /** |
| * View flag indicating whether {@link #addFocusables(ArrayList, int, int)} |
| * should add only Views focusable in touch mode. |
| */ |
| public static final int FOCUSABLES_TOUCH_MODE = 0x00000001; |
| |
| /** |
| * Use with {@link #focusSearch(int)}. Move focus to the previous selectable |
| * item. |
| */ |
| public static final int FOCUS_BACKWARD = 0x00000001; |
| |
| /** |
| * Use with {@link #focusSearch(int)}. Move focus to the next selectable |
| * item. |
| */ |
| public static final int FOCUS_FORWARD = 0x00000002; |
| |
| /** |
| * Use with {@link #focusSearch(int)}. Move focus to the left. |
| */ |
| public static final int FOCUS_LEFT = 0x00000011; |
| |
| /** |
| * Use with {@link #focusSearch(int)}. Move focus up. |
| */ |
| public static final int FOCUS_UP = 0x00000021; |
| |
| /** |
| * Use with {@link #focusSearch(int)}. Move focus to the right. |
| */ |
| public static final int FOCUS_RIGHT = 0x00000042; |
| |
| /** |
| * Use with {@link #focusSearch(int)}. Move focus down. |
| */ |
| public static final int FOCUS_DOWN = 0x00000082; |
| |
| /** |
| * Bits of {@link #getMeasuredWidthAndState()} and |
| * {@link #getMeasuredWidthAndState()} that provide the actual measured size. |
| */ |
| public static final int MEASURED_SIZE_MASK = 0x00ffffff; |
| |
| /** |
| * Bits of {@link #getMeasuredWidthAndState()} and |
| * {@link #getMeasuredWidthAndState()} that provide the additional state bits. |
| */ |
| public static final int MEASURED_STATE_MASK = 0xff000000; |
| |
| /** |
| * Bit shift of {@link #MEASURED_STATE_MASK} to get to the height bits |
| * for functions that combine both width and height into a single int, |
| * such as {@link #getMeasuredState()} and the childState argument of |
| * {@link #resolveSizeAndState(int, int, int)}. |
| */ |
| public static final int MEASURED_HEIGHT_STATE_SHIFT = 16; |
| |
| /** |
| * Bit of {@link #getMeasuredWidthAndState()} and |
| * {@link #getMeasuredWidthAndState()} that indicates the measured size |
| * is smaller that the space the view would like to have. |
| */ |
| public static final int MEASURED_STATE_TOO_SMALL = 0x01000000; |
| |
| /** |
| * Base View state sets |
| */ |
| // Singles |
| /** |
| * Indicates the view has no states set. States are used with |
| * {@link android.graphics.drawable.Drawable} to change the drawing of the |
| * view depending on its state. |
| * |
| * @see android.graphics.drawable.Drawable |
| * @see #getDrawableState() |
| */ |
| protected static final int[] EMPTY_STATE_SET; |
| /** |
| * Indicates the view is enabled. States are used with |
| * {@link android.graphics.drawable.Drawable} to change the drawing of the |
| * view depending on its state. |
| * |
| * @see android.graphics.drawable.Drawable |
| * @see #getDrawableState() |
| */ |
| protected static final int[] ENABLED_STATE_SET; |
| /** |
| * Indicates the view is focused. States are used with |
| * {@link android.graphics.drawable.Drawable} to change the drawing of the |
| * view depending on its state. |
| * |
| * @see android.graphics.drawable.Drawable |
| * @see #getDrawableState() |
| */ |
| protected static final int[] FOCUSED_STATE_SET; |
| /** |
| * Indicates the view is selected. States are used with |
| * {@link android.graphics.drawable.Drawable} to change the drawing of the |
| * view depending on its state. |
| * |
| * @see android.graphics.drawable.Drawable |
| * @see #getDrawableState() |
| */ |
| protected static final int[] SELECTED_STATE_SET; |
| /** |
| * Indicates the view is pressed. States are used with |
| * {@link android.graphics.drawable.Drawable} to change the drawing of the |
| * view depending on its state. |
| * |
| * @see android.graphics.drawable.Drawable |
| * @see #getDrawableState() |
| * @hide |
| */ |
| protected static final int[] PRESSED_STATE_SET; |
| /** |
| * Indicates the view's window has focus. States are used with |
| * {@link android.graphics.drawable.Drawable} to change the drawing of the |
| * view depending on its state. |
| * |
| * @see android.graphics.drawable.Drawable |
| * @see #getDrawableState() |
| */ |
| protected static final int[] WINDOW_FOCUSED_STATE_SET; |
| // Doubles |
| /** |
| * Indicates the view is enabled and has the focus. |
| * |
| * @see #ENABLED_STATE_SET |
| * @see #FOCUSED_STATE_SET |
| */ |
| protected static final int[] ENABLED_FOCUSED_STATE_SET; |
| /** |
| * Indicates the view is enabled and selected. |
| * |
| * @see #ENABLED_STATE_SET |
| * @see #SELECTED_STATE_SET |
| */ |
| protected static final int[] ENABLED_SELECTED_STATE_SET; |
| /** |
| * Indicates the view is enabled and that its window has focus. |
| * |
| * @see #ENABLED_STATE_SET |
| * @see #WINDOW_FOCUSED_STATE_SET |
| */ |
| protected static final int[] ENABLED_WINDOW_FOCUSED_STATE_SET; |
| /** |
| * Indicates the view is focused and selected. |
| * |
| * @see #FOCUSED_STATE_SET |
| * @see #SELECTED_STATE_SET |
| */ |
| protected static final int[] FOCUSED_SELECTED_STATE_SET; |
| /** |
| * Indicates the view has the focus and that its window has the focus. |
| * |
| * @see #FOCUSED_STATE_SET |
| * @see #WINDOW_FOCUSED_STATE_SET |
| */ |
| protected static final int[] FOCUSED_WINDOW_FOCUSED_STATE_SET; |
| /** |
| * Indicates the view is selected and that its window has the focus. |
| * |
| * @see #SELECTED_STATE_SET |
| * @see #WINDOW_FOCUSED_STATE_SET |
| */ |
| protected static final int[] SELECTED_WINDOW_FOCUSED_STATE_SET; |
| // Triples |
| /** |
| * Indicates the view is enabled, focused and selected. |
| * |
| * @see #ENABLED_STATE_SET |
| * @see #FOCUSED_STATE_SET |
| * @see #SELECTED_STATE_SET |
| */ |
| protected static final int[] ENABLED_FOCUSED_SELECTED_STATE_SET; |
| /** |
| * Indicates the view is enabled, focused and its window has the focus. |
| * |
| * @see #ENABLED_STATE_SET |
| * @see #FOCUSED_STATE_SET |
| * @see #WINDOW_FOCUSED_STATE_SET |
| */ |
| protected static final int[] ENABLED_FOCUSED_WINDOW_FOCUSED_STATE_SET; |
| /** |
| * Indicates the view is enabled, selected and its window has the focus. |
| * |
| * @see #ENABLED_STATE_SET |
| * @see #SELECTED_STATE_SET |
| * @see #WINDOW_FOCUSED_STATE_SET |
| */ |
| protected static final int[] ENABLED_SELECTED_WINDOW_FOCUSED_STATE_SET; |
| /** |
| * Indicates the view is focused, selected and its window has the focus. |
| * |
| * @see #FOCUSED_STATE_SET |
| * @see #SELECTED_STATE_SET |
| * @see #WINDOW_FOCUSED_STATE_SET |
| */ |
| protected static final int[] FOCUSED_SELECTED_WINDOW_FOCUSED_STATE_SET; |
| /** |
| * Indicates the view is enabled, focused, selected and its window |
| * has the focus. |
| * |
| * @see #ENABLED_STATE_SET |
| * @see #FOCUSED_STATE_SET |
| * @see #SELECTED_STATE_SET |
| * @see #WINDOW_FOCUSED_STATE_SET |
| */ |
| protected static final int[] ENABLED_FOCUSED_SELECTED_WINDOW_FOCUSED_STATE_SET; |
| /** |
| * Indicates the view is pressed and its window has the focus. |
| * |
| * @see #PRESSED_STATE_SET |
| * @see #WINDOW_FOCUSED_STATE_SET |
| */ |
| protected static final int[] PRESSED_WINDOW_FOCUSED_STATE_SET; |
| /** |
| * Indicates the view is pressed and selected. |
| * |
| * @see #PRESSED_STATE_SET |
| * @see #SELECTED_STATE_SET |
| */ |
| protected static final int[] PRESSED_SELECTED_STATE_SET; |
| /** |
| * Indicates the view is pressed, selected and its window has the focus. |
| * |
| * @see #PRESSED_STATE_SET |
| * @see #SELECTED_STATE_SET |
| * @see #WINDOW_FOCUSED_STATE_SET |
| */ |
| protected static final int[] PRESSED_SELECTED_WINDOW_FOCUSED_STATE_SET; |
| /** |
| * Indicates the view is pressed and focused. |
| * |
| * @see #PRESSED_STATE_SET |
| * @see #FOCUSED_STATE_SET |
| */ |
| protected static final int[] PRESSED_FOCUSED_STATE_SET; |
| /** |
| * Indicates the view is pressed, focused and its window has the focus. |
| * |
| * @see #PRESSED_STATE_SET |
| * @see #FOCUSED_STATE_SET |
| * @see #WINDOW_FOCUSED_STATE_SET |
| */ |
| protected static final int[] PRESSED_FOCUSED_WINDOW_FOCUSED_STATE_SET; |
| /** |
| * Indicates the view is pressed, focused and selected. |
| * |
| * @see #PRESSED_STATE_SET |
| * @see #SELECTED_STATE_SET |
| * @see #FOCUSED_STATE_SET |
| */ |
| protected static final int[] PRESSED_FOCUSED_SELECTED_STATE_SET; |
| /** |
| * Indicates the view is pressed, focused, selected and its window has the focus. |
| * |
| * @see #PRESSED_STATE_SET |
| * @see #FOCUSED_STATE_SET |
| * @see #SELECTED_STATE_SET |
| * @see #WINDOW_FOCUSED_STATE_SET |
| */ |
| protected static final int[] PRESSED_FOCUSED_SELECTED_WINDOW_FOCUSED_STATE_SET; |
| /** |
| * Indicates the view is pressed and enabled. |
| * |
| * @see #PRESSED_STATE_SET |
| * @see #ENABLED_STATE_SET |
| */ |
| protected static final int[] PRESSED_ENABLED_STATE_SET; |
| /** |
| * Indicates the view is pressed, enabled and its window has the focus. |
| * |
| * @see #PRESSED_STATE_SET |
| * @see #ENABLED_STATE_SET |
| * @see #WINDOW_FOCUSED_STATE_SET |
| */ |
| protected static final int[] PRESSED_ENABLED_WINDOW_FOCUSED_STATE_SET; |
| /** |
| * Indicates the view is pressed, enabled and selected. |
| * |
| * @see #PRESSED_STATE_SET |
| * @see #ENABLED_STATE_SET |
| * @see #SELECTED_STATE_SET |
| */ |
| protected static final int[] PRESSED_ENABLED_SELECTED_STATE_SET; |
| /** |
| * Indicates the view is pressed, enabled, selected and its window has the |
| * focus. |
| * |
| * @see #PRESSED_STATE_SET |
| * @see #ENABLED_STATE_SET |
| * @see #SELECTED_STATE_SET |
| * @see #WINDOW_FOCUSED_STATE_SET |
| */ |
| protected static final int[] PRESSED_ENABLED_SELECTED_WINDOW_FOCUSED_STATE_SET; |
| /** |
| * Indicates the view is pressed, enabled and focused. |
| * |
| * @see #PRESSED_STATE_SET |
| * @see #ENABLED_STATE_SET |
| * @see #FOCUSED_STATE_SET |
| */ |
| protected static final int[] PRESSED_ENABLED_FOCUSED_STATE_SET; |
| /** |
| * Indicates the view is pressed, enabled, focused and its window has the |
| * focus. |
| * |
| * @see #PRESSED_STATE_SET |
| * @see #ENABLED_STATE_SET |
| * @see #FOCUSED_STATE_SET |
| * @see #WINDOW_FOCUSED_STATE_SET |
| */ |
| protected static final int[] PRESSED_ENABLED_FOCUSED_WINDOW_FOCUSED_STATE_SET; |
| /** |
| * Indicates the view is pressed, enabled, focused and selected. |
| * |
| * @see #PRESSED_STATE_SET |
| * @see #ENABLED_STATE_SET |
| * @see #SELECTED_STATE_SET |
| * @see #FOCUSED_STATE_SET |
| */ |
| protected static final int[] PRESSED_ENABLED_FOCUSED_SELECTED_STATE_SET; |
| /** |
| * Indicates the view is pressed, enabled, focused, selected and its window |
| * has the focus. |
| * |
| * @see #PRESSED_STATE_SET |
| * @see #ENABLED_STATE_SET |
| * @see #SELECTED_STATE_SET |
| * @see #FOCUSED_STATE_SET |
| * @see #WINDOW_FOCUSED_STATE_SET |
| */ |
| protected static final int[] PRESSED_ENABLED_FOCUSED_SELECTED_WINDOW_FOCUSED_STATE_SET; |
| |
| /** |
| * The order here is very important to {@link #getDrawableState()} |
| */ |
| private static final int[][] VIEW_STATE_SETS; |
| |
| static final int VIEW_STATE_WINDOW_FOCUSED = 1; |
| static final int VIEW_STATE_SELECTED = 1 << 1; |
| static final int VIEW_STATE_FOCUSED = 1 << 2; |
| static final int VIEW_STATE_ENABLED = 1 << 3; |
| static final int VIEW_STATE_PRESSED = 1 << 4; |
| static final int VIEW_STATE_ACTIVATED = 1 << 5; |
| static final int VIEW_STATE_ACCELERATED = 1 << 6; |
| static final int VIEW_STATE_HOVERED = 1 << 7; |
| static final int VIEW_STATE_DRAG_CAN_ACCEPT = 1 << 8; |
| static final int VIEW_STATE_DRAG_HOVERED = 1 << 9; |
| |
| static final int[] VIEW_STATE_IDS = new int[] { |
| R.attr.state_window_focused, VIEW_STATE_WINDOW_FOCUSED, |
| R.attr.state_selected, VIEW_STATE_SELECTED, |
| R.attr.state_focused, VIEW_STATE_FOCUSED, |
| R.attr.state_enabled, VIEW_STATE_ENABLED, |
| R.attr.state_pressed, VIEW_STATE_PRESSED, |
| R.attr.state_activated, VIEW_STATE_ACTIVATED, |
| R.attr.state_accelerated, VIEW_STATE_ACCELERATED, |
| R.attr.state_hovered, VIEW_STATE_HOVERED, |
| R.attr.state_drag_can_accept, VIEW_STATE_DRAG_CAN_ACCEPT, |
| R.attr.state_drag_hovered, VIEW_STATE_DRAG_HOVERED, |
| }; |
| |
| static { |
| if ((VIEW_STATE_IDS.length/2) != R.styleable.ViewDrawableStates.length) { |
| throw new IllegalStateException( |
| "VIEW_STATE_IDs array length does not match ViewDrawableStates style array"); |
| } |
| int[] orderedIds = new int[VIEW_STATE_IDS.length]; |
| for (int i = 0; i < R.styleable.ViewDrawableStates.length; i++) { |
| int viewState = R.styleable.ViewDrawableStates[i]; |
| for (int j = 0; j<VIEW_STATE_IDS.length; j += 2) { |
| if (VIEW_STATE_IDS[j] == viewState) { |
| orderedIds[i * 2] = viewState; |
| orderedIds[i * 2 + 1] = VIEW_STATE_IDS[j + 1]; |
| } |
| } |
| } |
| final int NUM_BITS = VIEW_STATE_IDS.length / 2; |
| VIEW_STATE_SETS = new int[1 << NUM_BITS][]; |
| for (int i = 0; i < VIEW_STATE_SETS.length; i++) { |
| int numBits = Integer.bitCount(i); |
| int[] set = new int[numBits]; |
| int pos = 0; |
| for (int j = 0; j < orderedIds.length; j += 2) { |
| if ((i & orderedIds[j+1]) != 0) { |
| set[pos++] = orderedIds[j]; |
| } |
| } |
| VIEW_STATE_SETS[i] = set; |
| } |
| |
| EMPTY_STATE_SET = VIEW_STATE_SETS[0]; |
| WINDOW_FOCUSED_STATE_SET = VIEW_STATE_SETS[VIEW_STATE_WINDOW_FOCUSED]; |
| SELECTED_STATE_SET = VIEW_STATE_SETS[VIEW_STATE_SELECTED]; |
| SELECTED_WINDOW_FOCUSED_STATE_SET = VIEW_STATE_SETS[ |
| VIEW_STATE_WINDOW_FOCUSED | VIEW_STATE_SELECTED]; |
| FOCUSED_STATE_SET = VIEW_STATE_SETS[VIEW_STATE_FOCUSED]; |
| FOCUSED_WINDOW_FOCUSED_STATE_SET = VIEW_STATE_SETS[ |
| VIEW_STATE_WINDOW_FOCUSED | VIEW_STATE_FOCUSED]; |
| FOCUSED_SELECTED_STATE_SET = VIEW_STATE_SETS[ |
| VIEW_STATE_SELECTED | VIEW_STATE_FOCUSED]; |
| FOCUSED_SELECTED_WINDOW_FOCUSED_STATE_SET = VIEW_STATE_SETS[ |
| VIEW_STATE_WINDOW_FOCUSED | VIEW_STATE_SELECTED |
| | VIEW_STATE_FOCUSED]; |
| ENABLED_STATE_SET = VIEW_STATE_SETS[VIEW_STATE_ENABLED]; |
| ENABLED_WINDOW_FOCUSED_STATE_SET = VIEW_STATE_SETS[ |
| VIEW_STATE_WINDOW_FOCUSED | VIEW_STATE_ENABLED]; |
| ENABLED_SELECTED_STATE_SET = VIEW_STATE_SETS[ |
| VIEW_STATE_SELECTED | VIEW_STATE_ENABLED]; |
| ENABLED_SELECTED_WINDOW_FOCUSED_STATE_SET = VIEW_STATE_SETS[ |
| VIEW_STATE_WINDOW_FOCUSED | VIEW_STATE_SELECTED |
| | VIEW_STATE_ENABLED]; |
| ENABLED_FOCUSED_STATE_SET = VIEW_STATE_SETS[ |
| VIEW_STATE_FOCUSED | VIEW_STATE_ENABLED]; |
| ENABLED_FOCUSED_WINDOW_FOCUSED_STATE_SET = VIEW_STATE_SETS[ |
| VIEW_STATE_WINDOW_FOCUSED | VIEW_STATE_FOCUSED |
| | VIEW_STATE_ENABLED]; |
| ENABLED_FOCUSED_SELECTED_STATE_SET = VIEW_STATE_SETS[ |
| VIEW_STATE_SELECTED | VIEW_STATE_FOCUSED |
| | VIEW_STATE_ENABLED]; |
| ENABLED_FOCUSED_SELECTED_WINDOW_FOCUSED_STATE_SET = VIEW_STATE_SETS[ |
| VIEW_STATE_WINDOW_FOCUSED | VIEW_STATE_SELECTED |
| | VIEW_STATE_FOCUSED| VIEW_STATE_ENABLED]; |
| |
| PRESSED_STATE_SET = VIEW_STATE_SETS[VIEW_STATE_PRESSED]; |
| PRESSED_WINDOW_FOCUSED_STATE_SET = VIEW_STATE_SETS[ |
| VIEW_STATE_WINDOW_FOCUSED | VIEW_STATE_PRESSED]; |
| PRESSED_SELECTED_STATE_SET = VIEW_STATE_SETS[ |
| VIEW_STATE_SELECTED | VIEW_STATE_PRESSED]; |
| PRESSED_SELECTED_WINDOW_FOCUSED_STATE_SET = VIEW_STATE_SETS[ |
| VIEW_STATE_WINDOW_FOCUSED | VIEW_STATE_SELECTED |
| | VIEW_STATE_PRESSED]; |
| PRESSED_FOCUSED_STATE_SET = VIEW_STATE_SETS[ |
| VIEW_STATE_FOCUSED | VIEW_STATE_PRESSED]; |
| PRESSED_FOCUSED_WINDOW_FOCUSED_STATE_SET = VIEW_STATE_SETS[ |
| VIEW_STATE_WINDOW_FOCUSED | VIEW_STATE_FOCUSED |
| | VIEW_STATE_PRESSED]; |
| PRESSED_FOCUSED_SELECTED_STATE_SET = VIEW_STATE_SETS[ |
| VIEW_STATE_SELECTED | VIEW_STATE_FOCUSED |
| | VIEW_STATE_PRESSED]; |
| PRESSED_FOCUSED_SELECTED_WINDOW_FOCUSED_STATE_SET = VIEW_STATE_SETS[ |
| VIEW_STATE_WINDOW_FOCUSED | VIEW_STATE_SELECTED |
| | VIEW_STATE_FOCUSED | VIEW_STATE_PRESSED]; |
| PRESSED_ENABLED_STATE_SET = VIEW_STATE_SETS[ |
| VIEW_STATE_ENABLED | VIEW_STATE_PRESSED]; |
| PRESSED_ENABLED_WINDOW_FOCUSED_STATE_SET = VIEW_STATE_SETS[ |
| VIEW_STATE_WINDOW_FOCUSED | VIEW_STATE_ENABLED |
| | VIEW_STATE_PRESSED]; |
| PRESSED_ENABLED_SELECTED_STATE_SET = VIEW_STATE_SETS[ |
| VIEW_STATE_SELECTED | VIEW_STATE_ENABLED |
| | VIEW_STATE_PRESSED]; |
| PRESSED_ENABLED_SELECTED_WINDOW_FOCUSED_STATE_SET = VIEW_STATE_SETS[ |
| VIEW_STATE_WINDOW_FOCUSED | VIEW_STATE_SELECTED |
| | VIEW_STATE_ENABLED | VIEW_STATE_PRESSED]; |
| PRESSED_ENABLED_FOCUSED_STATE_SET = VIEW_STATE_SETS[ |
| VIEW_STATE_FOCUSED | VIEW_STATE_ENABLED |
| | VIEW_STATE_PRESSED]; |
| PRESSED_ENABLED_FOCUSED_WINDOW_FOCUSED_STATE_SET = VIEW_STATE_SETS[ |
| VIEW_STATE_WINDOW_FOCUSED | VIEW_STATE_FOCUSED |
| | VIEW_STATE_ENABLED | VIEW_STATE_PRESSED]; |
| PRESSED_ENABLED_FOCUSED_SELECTED_STATE_SET = VIEW_STATE_SETS[ |
| VIEW_STATE_SELECTED | VIEW_STATE_FOCUSED |
| | VIEW_STATE_ENABLED | VIEW_STATE_PRESSED]; |
| PRESSED_ENABLED_FOCUSED_SELECTED_WINDOW_FOCUSED_STATE_SET = VIEW_STATE_SETS[ |
| VIEW_STATE_WINDOW_FOCUSED | VIEW_STATE_SELECTED |
| | VIEW_STATE_FOCUSED| VIEW_STATE_ENABLED |
| | VIEW_STATE_PRESSED]; |
| } |
| |
| /** |
| * Temporary Rect currently for use in setBackground(). This will probably |
| * be extended in the future to hold our own class with more than just |
| * a Rect. :) |
| */ |
| static final ThreadLocal<Rect> sThreadLocal = new ThreadLocal<Rect>(); |
| |
| /** |
| * Map used to store views' tags. |
| */ |
| private static WeakHashMap<View, SparseArray<Object>> sTags; |
| |
| /** |
| * Lock used to access sTags. |
| */ |
| private static final Object sTagsLock = new Object(); |
| |
| /** |
| * The next available accessiiblity id. |
| */ |
| private static int sNextAccessibilityViewId; |
| |
| /** |
| * The animation currently associated with this view. |
| * @hide |
| */ |
| protected Animation mCurrentAnimation = null; |
| |
| /** |
| * Width as measured during measure pass. |
| * {@hide} |
| */ |
| @ViewDebug.ExportedProperty(category = "measurement") |
| int mMeasuredWidth; |
| |
| /** |
| * Height as measured during measure pass. |
| * {@hide} |
| */ |
| @ViewDebug.ExportedProperty(category = "measurement") |
| int mMeasuredHeight; |
| |
| /** |
| * Flag to indicate that this view was marked INVALIDATED, or had its display list |
| * invalidated, prior to the current drawing iteration. If true, the view must re-draw |
| * its display list. This flag, used only when hw accelerated, allows us to clear the |
| * flag while retaining this information until it's needed (at getDisplayList() time and |
| * in drawChild(), when we decide to draw a view's children's display lists into our own). |
| * |
| * {@hide} |
| */ |
| boolean mRecreateDisplayList = false; |
| |
| /** |
| * The view's identifier. |
| * {@hide} |
| * |
| * @see #setId(int) |
| * @see #getId() |
| */ |
| @ViewDebug.ExportedProperty(resolveId = true) |
| int mID = NO_ID; |
| |
| /** |
| * The stable ID of this view for accessibility porposes. |
| */ |
| int mAccessibilityViewId = NO_ID; |
| |
| /** |
| * The view's tag. |
| * {@hide} |
| * |
| * @see #setTag(Object) |
| * @see #getTag() |
| */ |
| protected Object mTag; |
| |
| // for mPrivateFlags: |
| /** {@hide} */ |
| static final int WANTS_FOCUS = 0x00000001; |
| /** {@hide} */ |
| static final int FOCUSED = 0x00000002; |
| /** {@hide} */ |
| static final int SELECTED = 0x00000004; |
| /** {@hide} */ |
| static final int IS_ROOT_NAMESPACE = 0x00000008; |
| /** {@hide} */ |
| static final int HAS_BOUNDS = 0x00000010; |
| /** {@hide} */ |
| static final int DRAWN = 0x00000020; |
| /** |
| * When this flag is set, this view is running an animation on behalf of its |
| * children and should therefore not cancel invalidate requests, even if they |
| * lie outside of this view's bounds. |
| * |
| * {@hide} |
| */ |
| static final int DRAW_ANIMATION = 0x00000040; |
| /** {@hide} */ |
| static final int SKIP_DRAW = 0x00000080; |
| /** {@hide} */ |
| static final int ONLY_DRAWS_BACKGROUND = 0x00000100; |
| /** {@hide} */ |
| static final int REQUEST_TRANSPARENT_REGIONS = 0x00000200; |
| /** {@hide} */ |
| static final int DRAWABLE_STATE_DIRTY = 0x00000400; |
| /** {@hide} */ |
| static final int MEASURED_DIMENSION_SET = 0x00000800; |
| /** {@hide} */ |
| static final int FORCE_LAYOUT = 0x00001000; |
| /** {@hide} */ |
| static final int LAYOUT_REQUIRED = 0x00002000; |
| |
| private static final int PRESSED = 0x00004000; |
| |
| /** {@hide} */ |
| static final int DRAWING_CACHE_VALID = 0x00008000; |
| /** |
| * Flag used to indicate that this view should be drawn once more (and only once |
| * more) after its animation has completed. |
| * {@hide} |
| */ |
| static final int ANIMATION_STARTED = 0x00010000; |
| |
| private static final int SAVE_STATE_CALLED = 0x00020000; |
| |
| /** |
| * Indicates that the View returned true when onSetAlpha() was called and that |
| * the alpha must be restored. |
| * {@hide} |
| */ |
| static final int ALPHA_SET = 0x00040000; |
| |
| /** |
| * Set by {@link #setScrollContainer(boolean)}. |
| */ |
| static final int SCROLL_CONTAINER = 0x00080000; |
| |
| /** |
| * Set by {@link #setScrollContainer(boolean)}. |
| */ |
| static final int SCROLL_CONTAINER_ADDED = 0x00100000; |
| |
| /** |
| * View flag indicating whether this view was invalidated (fully or partially.) |
| * |
| * @hide |
| */ |
| static final int DIRTY = 0x00200000; |
| |
| /** |
| * View flag indicating whether this view was invalidated by an opaque |
| * invalidate request. |
| * |
| * @hide |
| */ |
| static final int DIRTY_OPAQUE = 0x00400000; |
| |
| /** |
| * Mask for {@link #DIRTY} and {@link #DIRTY_OPAQUE}. |
| * |
| * @hide |
| */ |
| static final int DIRTY_MASK = 0x00600000; |
| |
| /** |
| * Indicates whether the background is opaque. |
| * |
| * @hide |
| */ |
| static final int OPAQUE_BACKGROUND = 0x00800000; |
| |
| /** |
| * Indicates whether the scrollbars are opaque. |
| * |
| * @hide |
| */ |
| static final int OPAQUE_SCROLLBARS = 0x01000000; |
| |
| /** |
| * Indicates whether the view is opaque. |
| * |
| * @hide |
| */ |
| static final int OPAQUE_MASK = 0x01800000; |
| |
| /** |
| * Indicates a prepressed state; |
| * the short time between ACTION_DOWN and recognizing |
| * a 'real' press. Prepressed is used to recognize quick taps |
| * even when they are shorter than ViewConfiguration.getTapTimeout(). |
| * |
| * @hide |
| */ |
| private static final int PREPRESSED = 0x02000000; |
| |
| /** |
| * Indicates whether the view is temporarily detached. |
| * |
| * @hide |
| */ |
| static final int CANCEL_NEXT_UP_EVENT = 0x04000000; |
| |
| /** |
| * Indicates that we should awaken scroll bars once attached |
| * |
| * @hide |
| */ |
| private static final int AWAKEN_SCROLL_BARS_ON_ATTACH = 0x08000000; |
| |
| /** |
| * Indicates that the view has received HOVER_ENTER. Cleared on HOVER_EXIT. |
| * @hide |
| */ |
| private static final int HOVERED = 0x10000000; |
| |
| /** |
| * Indicates that pivotX or pivotY were explicitly set and we should not assume the center |
| * for transform operations |
| * |
| * @hide |
| */ |
| private static final int PIVOT_EXPLICITLY_SET = 0x20000000; |
| |
| /** {@hide} */ |
| static final int ACTIVATED = 0x40000000; |
| |
| /** |
| * Indicates that this view was specifically invalidated, not just dirtied because some |
| * child view was invalidated. The flag is used to determine when we need to recreate |
| * a view's display list (as opposed to just returning a reference to its existing |
| * display list). |
| * |
| * @hide |
| */ |
| static final int INVALIDATED = 0x80000000; |
| |
| /* Masks for mPrivateFlags2 */ |
| |
| /** |
| * Indicates that this view has reported that it can accept the current drag's content. |
| * Cleared when the drag operation concludes. |
| * @hide |
| */ |
| static final int DRAG_CAN_ACCEPT = 0x00000001; |
| |
| /** |
| * Indicates that this view is currently directly under the drag location in a |
| * drag-and-drop operation involving content that it can accept. Cleared when |
| * the drag exits the view, or when the drag operation concludes. |
| * @hide |
| */ |
| static final int DRAG_HOVERED = 0x00000002; |
| |
| /** |
| * Indicates whether the view layout direction has been resolved and drawn to the |
| * right-to-left direction. |
| * |
| * @hide |
| */ |
| static final int LAYOUT_DIRECTION_RESOLVED_RTL = 0x00000004; |
| |
| /** |
| * Indicates whether the view layout direction has been resolved. |
| * |
| * @hide |
| */ |
| static final int LAYOUT_DIRECTION_RESOLVED = 0x00000008; |
| |
| |
| /* End of masks for mPrivateFlags2 */ |
| |
| static final int DRAG_MASK = DRAG_CAN_ACCEPT | DRAG_HOVERED; |
| |
| /** |
| * Always allow a user to over-scroll this view, provided it is a |
| * view that can scroll. |
| * |
| * @see #getOverScrollMode() |
| * @see #setOverScrollMode(int) |
| */ |
| public static final int OVER_SCROLL_ALWAYS = 0; |
| |
| /** |
| * Allow a user to over-scroll this view only if the content is large |
| * enough to meaningfully scroll, provided it is a view that can scroll. |
| * |
| * @see #getOverScrollMode() |
| * @see #setOverScrollMode(int) |
| */ |
| public static final int OVER_SCROLL_IF_CONTENT_SCROLLS = 1; |
| |
| /** |
| * Never allow a user to over-scroll this view. |
| * |
| * @see #getOverScrollMode() |
| * @see #setOverScrollMode(int) |
| */ |
| public static final int OVER_SCROLL_NEVER = 2; |
| |
| /** |
| * View has requested the status bar to be visible (the default). |
| * |
| * @see #setSystemUiVisibility(int) |
| */ |
| public static final int STATUS_BAR_VISIBLE = 0; |
| |
| /** |
| * View has requested the status bar to be hidden. |
| * |
| * @see #setSystemUiVisibility(int) |
| */ |
| public static final int STATUS_BAR_HIDDEN = 0x00000001; |
| |
| /** |
| * @hide |
| * |
| * NOTE: This flag may only be used in subtreeSystemUiVisibility. It is masked |
| * out of the public fields to keep the undefined bits out of the developer's way. |
| * |
| * Flag to make the status bar not expandable. Unless you also |
| * set {@link #STATUS_BAR_DISABLE_NOTIFICATION_ICONS}, new notifications will continue to show. |
| */ |
| public static final int STATUS_BAR_DISABLE_EXPAND = 0x00010000; |
| |
| /** |
| * @hide |
| * |
| * NOTE: This flag may only be used in subtreeSystemUiVisibility. It is masked |
| * out of the public fields to keep the undefined bits out of the developer's way. |
| * |
| * Flag to hide notification icons and scrolling ticker text. |
| */ |
| public static final int STATUS_BAR_DISABLE_NOTIFICATION_ICONS = 0x00020000; |
| |
| /** |
| * @hide |
| * |
| * NOTE: This flag may only be used in subtreeSystemUiVisibility. It is masked |
| * out of the public fields to keep the undefined bits out of the developer's way. |
| * |
| * Flag to disable incoming notification alerts. This will not block |
| * icons, but it will block sound, vibrating and other visual or aural notifications. |
| */ |
| public static final int STATUS_BAR_DISABLE_NOTIFICATION_ALERTS = 0x00040000; |
| |
| /** |
| * @hide |
| * |
| * NOTE: This flag may only be used in subtreeSystemUiVisibility. It is masked |
| * out of the public fields to keep the undefined bits out of the developer's way. |
| * |
| * Flag to hide only the scrolling ticker. Note that |
| * {@link #STATUS_BAR_DISABLE_NOTIFICATION_ICONS} implies |
| * {@link #STATUS_BAR_DISABLE_NOTIFICATION_TICKER}. |
| */ |
| public static final int STATUS_BAR_DISABLE_NOTIFICATION_TICKER = 0x00080000; |
| |
| /** |
| * @hide |
| * |
| * NOTE: This flag may only be used in subtreeSystemUiVisibility. It is masked |
| * out of the public fields to keep the undefined bits out of the developer's way. |
| * |
| * Flag to hide the center system info area. |
| */ |
| public static final int STATUS_BAR_DISABLE_SYSTEM_INFO = 0x00100000; |
| |
| /** |
| * @hide |
| * |
| * NOTE: This flag may only be used in subtreeSystemUiVisibility. It is masked |
| * out of the public fields to keep the undefined bits out of the developer's way. |
| * |
| * Flag to hide only the navigation buttons. Don't use this |
| * unless you're a special part of the system UI (i.e., setup wizard, keyguard). |
| * |
| * THIS DOES NOT DISABLE THE BACK BUTTON |
| */ |
| public static final int STATUS_BAR_DISABLE_NAVIGATION = 0x00200000; |
| |
| /** |
| * @hide |
| * |
| * NOTE: This flag may only be used in subtreeSystemUiVisibility. It is masked |
| * out of the public fields to keep the undefined bits out of the developer's way. |
| * |
| * Flag to hide only the back button. Don't use this |
| * unless you're a special part of the system UI (i.e., setup wizard, keyguard). |
| */ |
| public static final int STATUS_BAR_DISABLE_BACK = 0x00400000; |
| |
| /** |
| * @hide |
| * |
| * NOTE: This flag may only be used in subtreeSystemUiVisibility. It is masked |
| * out of the public fields to keep the undefined bits out of the developer's way. |
| * |
| * Flag to hide only the clock. You might use this if your activity has |
| * its own clock making the status bar's clock redundant. |
| */ |
| public static final int STATUS_BAR_DISABLE_CLOCK = 0x00800000; |
| |
| /** |
| * @hide |
| */ |
| public static final int PUBLIC_STATUS_BAR_VISIBILITY_MASK = STATUS_BAR_HIDDEN; |
| |
| /** |
| * Controls the over-scroll mode for this view. |
| * See {@link #overScrollBy(int, int, int, int, int, int, int, int, boolean)}, |
| * {@link #OVER_SCROLL_ALWAYS}, {@link #OVER_SCROLL_IF_CONTENT_SCROLLS}, |
| * and {@link #OVER_SCROLL_NEVER}. |
| */ |
| private int mOverScrollMode; |
| |
| /** |
| * The parent this view is attached to. |
| * {@hide} |
| * |
| * @see #getParent() |
| */ |
| protected ViewParent mParent; |
| |
| /** |
| * {@hide} |
| */ |
| AttachInfo mAttachInfo; |
| |
| /** |
| * {@hide} |
| */ |
| @ViewDebug.ExportedProperty(flagMapping = { |
| @ViewDebug.FlagToString(mask = FORCE_LAYOUT, equals = FORCE_LAYOUT, |
| name = "FORCE_LAYOUT"), |
| @ViewDebug.FlagToString(mask = LAYOUT_REQUIRED, equals = LAYOUT_REQUIRED, |
| name = "LAYOUT_REQUIRED"), |
| @ViewDebug.FlagToString(mask = DRAWING_CACHE_VALID, equals = DRAWING_CACHE_VALID, |
| name = "DRAWING_CACHE_INVALID", outputIf = false), |
| @ViewDebug.FlagToString(mask = DRAWN, equals = DRAWN, name = "DRAWN", outputIf = true), |
| @ViewDebug.FlagToString(mask = DRAWN, equals = DRAWN, name = "NOT_DRAWN", outputIf = false), |
| @ViewDebug.FlagToString(mask = DIRTY_MASK, equals = DIRTY_OPAQUE, name = "DIRTY_OPAQUE"), |
| @ViewDebug.FlagToString(mask = DIRTY_MASK, equals = DIRTY, name = "DIRTY") |
| }) |
| int mPrivateFlags; |
| int mPrivateFlags2; |
| |
| /** |
| * This view's request for the visibility of the status bar. |
| * @hide |
| */ |
| @ViewDebug.ExportedProperty() |
| int mSystemUiVisibility; |
| |
| /** |
| * Count of how many windows this view has been attached to. |
| */ |
| int mWindowAttachCount; |
| |
| /** |
| * The layout parameters associated with this view and used by the parent |
| * {@link android.view.ViewGroup} to determine how this view should be |
| * laid out. |
| * {@hide} |
| */ |
| protected ViewGroup.LayoutParams mLayoutParams; |
| |
| /** |
| * The view flags hold various views states. |
| * {@hide} |
| */ |
| @ViewDebug.ExportedProperty |
| int mViewFlags; |
| |
| /** |
| * The transform matrix for the View. This transform is calculated internally |
| * based on the rotation, scaleX, and scaleY properties. The identity matrix |
| * is used by default. Do *not* use this variable directly; instead call |
| * getMatrix(), which will automatically recalculate the matrix if necessary |
| * to get the correct matrix based on the latest rotation and scale properties. |
| */ |
| private final Matrix mMatrix = new Matrix(); |
| |
| /** |
| * The transform matrix for the View. This transform is calculated internally |
| * based on the rotation, scaleX, and scaleY properties. The identity matrix |
| * is used by default. Do *not* use this variable directly; instead call |
| * getInverseMatrix(), which will automatically recalculate the matrix if necessary |
| * to get the correct matrix based on the latest rotation and scale properties. |
| */ |
| private Matrix mInverseMatrix; |
| |
| /** |
| * An internal variable that tracks whether we need to recalculate the |
| * transform matrix, based on whether the rotation or scaleX/Y properties |
| * have changed since the matrix was last calculated. |
| */ |
| boolean mMatrixDirty = false; |
| |
| /** |
| * An internal variable that tracks whether we need to recalculate the |
| * transform matrix, based on whether the rotation or scaleX/Y properties |
| * have changed since the matrix was last calculated. |
| */ |
| private boolean mInverseMatrixDirty = true; |
| |
| /** |
| * A variable that tracks whether we need to recalculate the |
| * transform matrix, based on whether the rotation or scaleX/Y properties |
| * have changed since the matrix was last calculated. This variable |
| * is only valid after a call to updateMatrix() or to a function that |
| * calls it such as getMatrix(), hasIdentityMatrix() and getInverseMatrix(). |
| */ |
| private boolean mMatrixIsIdentity = true; |
| |
| /** |
| * The Camera object is used to compute a 3D matrix when rotationX or rotationY are set. |
| */ |
| private Camera mCamera = null; |
| |
| /** |
| * This matrix is used when computing the matrix for 3D rotations. |
| */ |
| private Matrix matrix3D = null; |
| |
| /** |
| * These prev values are used to recalculate a centered pivot point when necessary. The |
| * pivot point is only used in matrix operations (when rotation, scale, or translation are |
| * set), so thes values are only used then as well. |
| */ |
| private int mPrevWidth = -1; |
| private int mPrevHeight = -1; |
| |
| private boolean mLastIsOpaque; |
| |
| /** |
| * Convenience value to check for float values that are close enough to zero to be considered |
| * zero. |
| */ |
| private static final float NONZERO_EPSILON = .001f; |
| |
| /** |
| * The degrees rotation around the vertical axis through the pivot point. |
| */ |
| @ViewDebug.ExportedProperty |
| float mRotationY = 0f; |
| |
| /** |
| * The degrees rotation around the horizontal axis through the pivot point. |
| */ |
| @ViewDebug.ExportedProperty |
| float mRotationX = 0f; |
| |
| /** |
| * The degrees rotation around the pivot point. |
| */ |
| @ViewDebug.ExportedProperty |
| float mRotation = 0f; |
| |
| /** |
| * The amount of translation of the object away from its left property (post-layout). |
| */ |
| @ViewDebug.ExportedProperty |
| float mTranslationX = 0f; |
| |
| /** |
| * The amount of translation of the object away from its top property (post-layout). |
| */ |
| @ViewDebug.ExportedProperty |
| float mTranslationY = 0f; |
| |
| /** |
| * The amount of scale in the x direction around the pivot point. A |
| * value of 1 means no scaling is applied. |
| */ |
| @ViewDebug.ExportedProperty |
| float mScaleX = 1f; |
| |
| /** |
| * The amount of scale in the y direction around the pivot point. A |
| * value of 1 means no scaling is applied. |
| */ |
| @ViewDebug.ExportedProperty |
| float mScaleY = 1f; |
| |
| /** |
| * The amount of scale in the x direction around the pivot point. A |
| * value of 1 means no scaling is applied. |
| */ |
| @ViewDebug.ExportedProperty |
| float mPivotX = 0f; |
| |
| /** |
| * The amount of scale in the y direction around the pivot point. A |
| * value of 1 means no scaling is applied. |
| */ |
| @ViewDebug.ExportedProperty |
| float mPivotY = 0f; |
| |
| /** |
| * The opacity of the View. This is a value from 0 to 1, where 0 means |
| * completely transparent and 1 means completely opaque. |
| */ |
| @ViewDebug.ExportedProperty |
| float mAlpha = 1f; |
| |
| /** |
| * The distance in pixels from the left edge of this view's parent |
| * to the left edge of this view. |
| * {@hide} |
| */ |
| @ViewDebug.ExportedProperty(category = "layout") |
| protected int mLeft; |
| /** |
| * The distance in pixels from the left edge of this view's parent |
| * to the right edge of this view. |
| * {@hide} |
| */ |
| @ViewDebug.ExportedProperty(category = "layout") |
| protected int mRight; |
| /** |
| * The distance in pixels from the top edge of this view's parent |
| * to the top edge of this view. |
| * {@hide} |
| */ |
| @ViewDebug.ExportedProperty(category = "layout") |
| protected int mTop; |
| /** |
| * The distance in pixels from the top edge of this view's parent |
| * to the bottom edge of this view. |
| * {@hide} |
| */ |
| @ViewDebug.ExportedProperty(category = "layout") |
| protected int mBottom; |
| |
| /** |
| * The offset, in pixels, by which the content of this view is scrolled |
| * horizontally. |
| * {@hide} |
| */ |
| @ViewDebug.ExportedProperty(category = "scrolling") |
| protected int mScrollX; |
| /** |
| * The offset, in pixels, by which the content of this view is scrolled |
| * vertically. |
| * {@hide} |
| */ |
| @ViewDebug.ExportedProperty(category = "scrolling") |
| protected int mScrollY; |
| |
| /** |
| * The left padding in pixels, that is the distance in pixels between the |
| * left edge of this view and the left edge of its content. |
| * {@hide} |
| */ |
| @ViewDebug.ExportedProperty(category = "padding") |
| protected int mPaddingLeft; |
| /** |
| * The right padding in pixels, that is the distance in pixels between the |
| * right edge of this view and the right edge of its content. |
| * {@hide} |
| */ |
| @ViewDebug.ExportedProperty(category = "padding") |
| protected int mPaddingRight; |
| /** |
| * The top padding in pixels, that is the distance in pixels between the |
| * top edge of this view and the top edge of its content. |
| * {@hide} |
| */ |
| @ViewDebug.ExportedProperty(category = "padding") |
| protected int mPaddingTop; |
| /** |
| * The bottom padding in pixels, that is the distance in pixels between the |
| * bottom edge of this view and the bottom edge of its content. |
| * {@hide} |
| */ |
| @ViewDebug.ExportedProperty(category = "padding") |
| protected int mPaddingBottom; |
| |
| /** |
| * Briefly describes the view and is primarily used for accessibility support. |
| */ |
| private CharSequence mContentDescription; |
| |
| /** |
| * Cache the paddingRight set by the user to append to the scrollbar's size. |
| */ |
| @ViewDebug.ExportedProperty(category = "padding") |
| int mUserPaddingRight; |
| |
| /** |
| * Cache the paddingBottom set by the user to append to the scrollbar's size. |
| */ |
| @ViewDebug.ExportedProperty(category = "padding") |
| int mUserPaddingBottom; |
| |
| /** |
| * Cache the paddingLeft set by the user to append to the scrollbar's size. |
| */ |
| @ViewDebug.ExportedProperty(category = "padding") |
| int mUserPaddingLeft; |
| |
| /** |
| * Cache if the user padding is relative. |
| * |
| */ |
| @ViewDebug.ExportedProperty(category = "padding") |
| boolean mUserPaddingRelative; |
| |
| /** |
| * Cache the paddingStart set by the user to append to the scrollbar's size. |
| * |
| */ |
| @ViewDebug.ExportedProperty(category = "padding") |
| int mUserPaddingStart; |
| |
| /** |
| * Cache the paddingEnd set by the user to append to the scrollbar's size. |
| * |
| */ |
| @ViewDebug.ExportedProperty(category = "padding") |
| int mUserPaddingEnd; |
| |
| /** |
| * @hide |
| */ |
| int mOldWidthMeasureSpec = Integer.MIN_VALUE; |
| /** |
| * @hide |
| */ |
| int mOldHeightMeasureSpec = Integer.MIN_VALUE; |
| |
| private Resources mResources = null; |
| |
| private Drawable mBGDrawable; |
| |
| private int mBackgroundResource; |
| private boolean mBackgroundSizeChanged; |
| |
| /** |
| * Listener used to dispatch focus change events. |
| * This field should be made private, so it is hidden from the SDK. |
| * {@hide} |
| */ |
| protected OnFocusChangeListener mOnFocusChangeListener; |
| |
| /** |
| * Listeners for layout change events. |
| */ |
| private ArrayList<OnLayoutChangeListener> mOnLayoutChangeListeners; |
| |
| /** |
| * Listeners for attach events. |
| */ |
| private CopyOnWriteArrayList<OnAttachStateChangeListener> mOnAttachStateChangeListeners; |
| |
| /** |
| * Listener used to dispatch click events. |
| * This field should be made private, so it is hidden from the SDK. |
| * {@hide} |
| */ |
| protected OnClickListener mOnClickListener; |
| |
| /** |
| * Listener used to dispatch long click events. |
| * This field should be made private, so it is hidden from the SDK. |
| * {@hide} |
| */ |
| protected OnLongClickListener mOnLongClickListener; |
| |
| /** |
| * Listener used to build the context menu. |
| * This field should be made private, so it is hidden from the SDK. |
| * {@hide} |
| */ |
| protected OnCreateContextMenuListener mOnCreateContextMenuListener; |
| |
| private OnKeyListener mOnKeyListener; |
| |
| private OnTouchListener mOnTouchListener; |
| |
| private OnHoverListener mOnHoverListener; |
| |
| private OnGenericMotionListener mOnGenericMotionListener; |
| |
| private OnDragListener mOnDragListener; |
| |
| private OnSystemUiVisibilityChangeListener mOnSystemUiVisibilityChangeListener; |
| |
| /** |
| * The application environment this view lives in. |
| * This field should be made private, so it is hidden from the SDK. |
| * {@hide} |
| */ |
| protected Context mContext; |
| |
| private ScrollabilityCache mScrollCache; |
| |
| private int[] mDrawableState = null; |
| |
| /** |
| * Set to true when drawing cache is enabled and cannot be created. |
| * |
| * @hide |
| */ |
| public boolean mCachingFailed; |
| |
| private Bitmap mDrawingCache; |
| private Bitmap mUnscaledDrawingCache; |
| private DisplayList mDisplayList; |
| private HardwareLayer mHardwareLayer; |
| |
| /** |
| * When this view has focus and the next focus is {@link #FOCUS_LEFT}, |
| * the user may specify which view to go to next. |
| */ |
| private int mNextFocusLeftId = View.NO_ID; |
| |
| /** |
| * When this view has focus and the next focus is {@link #FOCUS_RIGHT}, |
| * the user may specify which view to go to next. |
| */ |
| private int mNextFocusRightId = View.NO_ID; |
| |
| /** |
| * When this view has focus and the next focus is {@link #FOCUS_UP}, |
| * the user may specify which view to go to next. |
| */ |
| private int mNextFocusUpId = View.NO_ID; |
| |
| /** |
| * When this view has focus and the next focus is {@link #FOCUS_DOWN}, |
| * the user may specify which view to go to next. |
| */ |
| private int mNextFocusDownId = View.NO_ID; |
| |
| /** |
| * When this view has focus and the next focus is {@link #FOCUS_FORWARD}, |
| * the user may specify which view to go to next. |
| */ |
| int mNextFocusForwardId = View.NO_ID; |
| |
| private CheckForLongPress mPendingCheckForLongPress; |
| private CheckForTap mPendingCheckForTap = null; |
| private PerformClick mPerformClick; |
| private SendViewScrolledAccessibilityEvent mSendViewScrolledAccessibilityEvent; |
| |
| private UnsetPressedState mUnsetPressedState; |
| |
| /** |
| * Whether the long press's action has been invoked. The tap's action is invoked on the |
| * up event while a long press is invoked as soon as the long press duration is reached, so |
| * a long press could be performed before the tap is checked, in which case the tap's action |
| * should not be invoked. |
| */ |
| private boolean mHasPerformedLongPress; |
| |
| /** |
| * The minimum height of the view. We'll try our best to have the height |
| * of this view to at least this amount. |
| */ |
| @ViewDebug.ExportedProperty(category = "measurement") |
| private int mMinHeight; |
| |
| /** |
| * The minimum width of the view. We'll try our best to have the width |
| * of this view to at least this amount. |
| */ |
| @ViewDebug.ExportedProperty(category = "measurement") |
| private int mMinWidth; |
| |
| /** |
| * The delegate to handle touch events that are physically in this view |
| * but should be handled by another view. |
| */ |
| private TouchDelegate mTouchDelegate = null; |
| |
| /** |
| * Solid color to use as a background when creating the drawing cache. Enables |
| * the cache to use 16 bit bitmaps instead of 32 bit. |
| */ |
| private int mDrawingCacheBackgroundColor = 0; |
| |
| /** |
| * Special tree observer used when mAttachInfo is null. |
| */ |
| private ViewTreeObserver mFloatingTreeObserver; |
| |
| /** |
| * Cache the touch slop from the context that created the view. |
| */ |
| private int mTouchSlop; |
| |
| /** |
| * Object that handles automatic animation of view properties. |
| */ |
| private ViewPropertyAnimator mAnimator = null; |
| |
| /** |
| * Flag indicating that a drag can cross window boundaries. When |
| * {@link #startDrag(ClipData, DragShadowBuilder, Object, int)} is called |
| * with this flag set, all visible applications will be able to participate |
| * in the drag operation and receive the dragged content. |
| * |
| * @hide |
| */ |
| public static final int DRAG_FLAG_GLOBAL = 1; |
| |
| /** |
| * Vertical scroll factor cached by {@link #getVerticalScrollFactor}. |
| */ |
| private float mVerticalScrollFactor; |
| |
| /** |
| * Position of the vertical scroll bar. |
| */ |
| private int mVerticalScrollbarPosition; |
| |
| /** |
| * Position the scroll bar at the default position as determined by the system. |
| */ |
| public static final int SCROLLBAR_POSITION_DEFAULT = 0; |
| |
| /** |
| * Position the scroll bar along the left edge. |
| */ |
| public static final int SCROLLBAR_POSITION_LEFT = 1; |
| |
| /** |
| * Position the scroll bar along the right edge. |
| */ |
| public static final int SCROLLBAR_POSITION_RIGHT = 2; |
| |
| /** |
| * Indicates that the view does not have a layer. |
| * |
| * @see #getLayerType() |
| * @see #setLayerType(int, android.graphics.Paint) |
| * @see #LAYER_TYPE_SOFTWARE |
| * @see #LAYER_TYPE_HARDWARE |
| */ |
| public static final int LAYER_TYPE_NONE = 0; |
| |
| /** |
| * <p>Indicates that the view has a software layer. A software layer is backed |
| * by a bitmap and causes the view to be rendered using Android's software |
| * rendering pipeline, even if hardware acceleration is enabled.</p> |
| * |
| * <p>Software layers have various usages:</p> |
| * <p>When the application is not using hardware acceleration, a software layer |
| * is useful to apply a specific color filter and/or blending mode and/or |
| * translucency to a view and all its children.</p> |
| * <p>When the application is using hardware acceleration, a software layer |
| * is useful to render drawing primitives not supported by the hardware |
| * accelerated pipeline. It can also be used to cache a complex view tree |
| * into a texture and reduce the complexity of drawing operations. For instance, |
| * when animating a complex view tree with a translation, a software layer can |
| * be used to render the view tree only once.</p> |
| * <p>Software layers should be avoided when the affected view tree updates |
| * often. Every update will require to re-render the software layer, which can |
| * potentially be slow (particularly when hardware acceleration is turned on |
| * since the layer will have to be uploaded into a hardware texture after every |
| * update.)</p> |
| * |
| * @see #getLayerType() |
| * @see #setLayerType(int, android.graphics.Paint) |
| * @see #LAYER_TYPE_NONE |
| * @see #LAYER_TYPE_HARDWARE |
| */ |
| public static final int LAYER_TYPE_SOFTWARE = 1; |
| |
| /** |
| * <p>Indicates that the view has a hardware layer. A hardware layer is backed |
| * by a hardware specific texture (generally Frame Buffer Objects or FBO on |
| * OpenGL hardware) and causes the view to be rendered using Android's hardware |
| * rendering pipeline, but only if hardware acceleration is turned on for the |
| * view hierarchy. When hardware acceleration is turned off, hardware layers |
| * behave exactly as {@link #LAYER_TYPE_SOFTWARE software layers}.</p> |
| * |
| * <p>A hardware layer is useful to apply a specific color filter and/or |
| * blending mode and/or translucency to a view and all its children.</p> |
| * <p>A hardware layer can be used to cache a complex view tree into a |
| * texture and reduce the complexity of drawing operations. For instance, |
| * when animating a complex view tree with a translation, a hardware layer can |
| * be used to render the view tree only once.</p> |
| * <p>A hardware layer can also be used to increase the rendering quality when |
| * rotation transformations are applied on a view. It can also be used to |
| * prevent potential clipping issues when applying 3D transforms on a view.</p> |
| * |
| * @see #getLayerType() |
| * @see #setLayerType(int, android.graphics.Paint) |
| * @see #LAYER_TYPE_NONE |
| * @see #LAYER_TYPE_SOFTWARE |
| */ |
| public static final int LAYER_TYPE_HARDWARE = 2; |
| |
| @ViewDebug.ExportedProperty(category = "drawing", mapping = { |
| @ViewDebug.IntToString(from = LAYER_TYPE_NONE, to = "NONE"), |
| @ViewDebug.IntToString(from = LAYER_TYPE_SOFTWARE, to = "SOFTWARE"), |
| @ViewDebug.IntToString(from = LAYER_TYPE_HARDWARE, to = "HARDWARE") |
| }) |
| int mLayerType = LAYER_TYPE_NONE; |
| Paint mLayerPaint; |
| Rect mLocalDirtyRect; |
| |
| /** |
| * Set to true when the view is sending hover accessibility events because it |
| * is the innermost hovered view. |
| */ |
| private boolean mSendingHoverAccessibilityEvents; |
| |
| /** |
| * Undefined text direction (used by resolution algorithm). |
| * @hide |
| */ |
| public static final int TEXT_DIRECTION_UNDEFINED = -1; |
| |
| /** |
| * Text direction is inherited thru {@link ViewGroup} |
| * @hide |
| */ |
| public static final int TEXT_DIRECTION_INHERIT = 0; |
| |
| /** |
| * Text direction is using "first strong algorithm". The first strong directional character |
| * determines the paragraph direction. If there is no strong directional character, the |
| * paragraph direction is the view’s resolved ayout direction. |
| * |
| * @hide |
| */ |
| public static final int TEXT_DIRECTION_FIRST_STRONG = 1; |
| |
| /** |
| * Text direction is using "any-RTL" algorithm. The paragraph direction is RTL if it contains |
| * any strong RTL character, otherwise it is LTR if it contains any strong LTR characters. |
| * If there are neither, the paragraph direction is the view’s resolved layout direction. |
| * |
| * @hide |
| */ |
| public static final int TEXT_DIRECTION_ANY_RTL = 2; |
| |
| /** |
| * Text direction is the same as the one held by a 60% majority of the characters. If there is |
| * no majority then the paragraph direction is the resolved layout direction of the View. |
| * |
| * @hide |
| */ |
| public static final int TEXT_DIRECTION_CHAR_COUNT = 3; |
| |
| /** |
| * Text direction is forced to LTR. |
| * |
| * @hide |
| */ |
| public static final int TEXT_DIRECTION_LTR = 4; |
| |
| /** |
| * Text direction is forced to RTL. |
| * |
| * @hide |
| */ |
| public static final int TEXT_DIRECTION_RTL = 5; |
| |
| /** |
| * Default text direction is inherited |
| */ |
| protected static int DEFAULT_TEXT_DIRECTION = TEXT_DIRECTION_INHERIT; |
| |
| /** |
| * Default threshold for "char count" heuristic. |
| */ |
| protected static float DEFAULT_TEXT_DIRECTION_CHAR_COUNT_THRESHOLD = 0.6f; |
| |
| /** |
| * The text direction that has been defined by {@link #setTextDirection(int)}. |
| * |
| * {@hide} |
| */ |
| @ViewDebug.ExportedProperty(category = "text", mapping = { |
| @ViewDebug.IntToString(from = TEXT_DIRECTION_UNDEFINED, to = "UNDEFINED"), |
| @ViewDebug.IntToString(from = TEXT_DIRECTION_INHERIT, to = "INHERIT"), |
| @ViewDebug.IntToString(from = TEXT_DIRECTION_FIRST_STRONG, to = "FIRST_STRONG"), |
| @ViewDebug.IntToString(from = TEXT_DIRECTION_ANY_RTL, to = "ANY_RTL"), |
| @ViewDebug.IntToString(from = TEXT_DIRECTION_CHAR_COUNT, to = "CHAR_COUNT"), |
| @ViewDebug.IntToString(from = TEXT_DIRECTION_LTR, to = "LTR"), |
| @ViewDebug.IntToString(from = TEXT_DIRECTION_RTL, to = "RTL") |
| }) |
| protected int mTextDirection = DEFAULT_TEXT_DIRECTION; |
| |
| /** |
| * The resolved text direction. If resolution has not yet been done or has been reset, it will |
| * be equal to {@link #TEXT_DIRECTION_UNDEFINED}. Otherwise it will be either {@link #TEXT_DIRECTION_LTR} |
| * or {@link #TEXT_DIRECTION_RTL}. |
| * |
| * {@hide} |
| */ |
| @ViewDebug.ExportedProperty(category = "text", mapping = { |
| @ViewDebug.IntToString(from = TEXT_DIRECTION_UNDEFINED, to = "UNDEFINED"), |
| @ViewDebug.IntToString(from = TEXT_DIRECTION_LTR, to = "LTR"), |
| @ViewDebug.IntToString(from = TEXT_DIRECTION_RTL, to = "RTL") |
| }) |
| protected int mResolvedTextDirection = TEXT_DIRECTION_UNDEFINED; |
| |
| /** |
| * Consistency verifier for debugging purposes. |
| * @hide |
| */ |
| protected final InputEventConsistencyVerifier mInputEventConsistencyVerifier = |
| InputEventConsistencyVerifier.isInstrumentationEnabled() ? |
| new InputEventConsistencyVerifier(this, 0) : null; |
| |
| /** |
| * Simple constructor to use when creating a view from code. |
| * |
| * @param context The Context the view is running in, through which it can |
| * access the current theme, resources, etc. |
| */ |
| public View(Context context) { |
| mContext = context; |
| mResources = context != null ? context.getResources() : null; |
| mViewFlags = SOUND_EFFECTS_ENABLED | HAPTIC_FEEDBACK_ENABLED | LAYOUT_DIRECTION_INHERIT; |
| mTouchSlop = ViewConfiguration.get(context).getScaledTouchSlop(); |
| setOverScrollMode(OVER_SCROLL_IF_CONTENT_SCROLLS); |
| mUserPaddingStart = -1; |
| mUserPaddingEnd = -1; |
| mUserPaddingRelative = false; |
| } |
| |
| /** |
| * Constructor that is called when inflating a view from XML. This is called |
| * when a view is being constructed from an XML file, supplying attributes |
| * that were specified in the XML file. This version uses a default style of |
| * 0, so the only attribute values applied are those in the Context's Theme |
| * and the given AttributeSet. |
| * |
| * <p> |
| * The method onFinishInflate() will be called after all children have been |
| * added. |
| * |
| * @param context The Context the view is running in, through which it can |
| * access the current theme, resources, etc. |
| * @param attrs The attributes of the XML tag that is inflating the view. |
| * @see #View(Context, AttributeSet, int) |
| */ |
| public View(Context context, AttributeSet attrs) { |
| this(context, attrs, 0); |
| } |
| |
| /** |
| * Perform inflation from XML and apply a class-specific base style. This |
| * constructor of View allows subclasses to use their own base style when |
| * they are inflating. For example, a Button class's constructor would call |
| * this version of the super class constructor and supply |
| * <code>R.attr.buttonStyle</code> for <var>defStyle</var>; this allows |
| * the theme's button style to modify all of the base view attributes (in |
| * particular its background) as well as the Button class's attributes. |
| * |
| * @param context The Context the view is running in, through which it can |
| * access the current theme, resources, etc. |
| * @param attrs The attributes of the XML tag that is inflating the view. |
| * @param defStyle The default style to apply to this view. If 0, no style |
| * will be applied (beyond what is included in the theme). This may |
| * either be an attribute resource, whose value will be retrieved |
| * from the current theme, or an explicit style resource. |
| * @see #View(Context, AttributeSet) |
| */ |
| public View(Context context, AttributeSet attrs, int defStyle) { |
| this(context); |
| |
| TypedArray a = context.obtainStyledAttributes(attrs, com.android.internal.R.styleable.View, |
| defStyle, 0); |
| |
| Drawable background = null; |
| |
| int leftPadding = -1; |
| int topPadding = -1; |
| int rightPadding = -1; |
| int bottomPadding = -1; |
| int startPadding = -1; |
| int endPadding = -1; |
| |
| int padding = -1; |
| |
| int viewFlagValues = 0; |
| int viewFlagMasks = 0; |
| |
| boolean setScrollContainer = false; |
| |
| int x = 0; |
| int y = 0; |
| |
| float tx = 0; |
| float ty = 0; |
| float rotation = 0; |
| float rotationX = 0; |
| float rotationY = 0; |
| float sx = 1f; |
| float sy = 1f; |
| boolean transformSet = false; |
| |
| int scrollbarStyle = SCROLLBARS_INSIDE_OVERLAY; |
| |
| int overScrollMode = mOverScrollMode; |
| final int N = a.getIndexCount(); |
| for (int i = 0; i < N; i++) { |
| int attr = a.getIndex(i); |
| switch (attr) { |
| case com.android.internal.R.styleable.View_background: |
| background = a.getDrawable(attr); |
| break; |
| case com.android.internal.R.styleable.View_padding: |
| padding = a.getDimensionPixelSize(attr, -1); |
| break; |
| case com.android.internal.R.styleable.View_paddingLeft: |
| leftPadding = a.getDimensionPixelSize(attr, -1); |
| break; |
| case com.android.internal.R.styleable.View_paddingTop: |
| topPadding = a.getDimensionPixelSize(attr, -1); |
| break; |
| case com.android.internal.R.styleable.View_paddingRight: |
| rightPadding = a.getDimensionPixelSize(attr, -1); |
| break; |
| case com.android.internal.R.styleable.View_paddingBottom: |
| bottomPadding = a.getDimensionPixelSize(attr, -1); |
| break; |
| case com.android.internal.R.styleable.View_paddingStart: |
| startPadding = a.getDimensionPixelSize(attr, -1); |
| break; |
| case com.android.internal.R.styleable.View_paddingEnd: |
| endPadding = a.getDimensionPixelSize(attr, -1); |
| break; |
| case com.android.internal.R.styleable.View_scrollX: |
| x = a.getDimensionPixelOffset(attr, 0); |
| break; |
| case com.android.internal.R.styleable.View_scrollY: |
| y = a.getDimensionPixelOffset(attr, 0); |
| break; |
| case com.android.internal.R.styleable.View_alpha: |
| setAlpha(a.getFloat(attr, 1f)); |
| break; |
| case com.android.internal.R.styleable.View_transformPivotX: |
| setPivotX(a.getDimensionPixelOffset(attr, 0)); |
| break; |
| case com.android.internal.R.styleable.View_transformPivotY: |
| setPivotY(a.getDimensionPixelOffset(attr, 0)); |
| break; |
| case com.android.internal.R.styleable.View_translationX: |
| tx = a.getDimensionPixelOffset(attr, 0); |
| transformSet = true; |
| break; |
| case com.android.internal.R.styleable.View_translationY: |
| ty = a.getDimensionPixelOffset(attr, 0); |
| transformSet = true; |
| break; |
| case com.android.internal.R.styleable.View_rotation: |
| rotation = a.getFloat(attr, 0); |
| transformSet = true; |
| break; |
| case com.android.internal.R.styleable.View_rotationX: |
| rotationX = a.getFloat(attr, 0); |
| transformSet = true; |
| break; |
| case com.android.internal.R.styleable.View_rotationY: |
| rotationY = a.getFloat(attr, 0); |
| transformSet = true; |
| break; |
| case com.android.internal.R.styleable.View_scaleX: |
| sx = a.getFloat(attr, 1f); |
| transformSet = true; |
| break; |
| case com.android.internal.R.styleable.View_scaleY: |
| sy = a.getFloat(attr, 1f); |
| transformSet = true; |
| break; |
| case com.android.internal.R.styleable.View_id: |
| mID = a.getResourceId(attr, NO_ID); |
| break; |
| case com.android.internal.R.styleable.View_tag: |
| mTag = a.getText(attr); |
| break; |
| case com.android.internal.R.styleable.View_fitsSystemWindows: |
| if (a.getBoolean(attr, false)) { |
| viewFlagValues |= FITS_SYSTEM_WINDOWS; |
| viewFlagMasks |= FITS_SYSTEM_WINDOWS; |
| } |
| break; |
| case com.android.internal.R.styleable.View_focusable: |
| if (a.getBoolean(attr, false)) { |
| viewFlagValues |= FOCUSABLE; |
| viewFlagMasks |= FOCUSABLE_MASK; |
| } |
| break; |
| case com.android.internal.R.styleable.View_focusableInTouchMode: |
| if (a.getBoolean(attr, false)) { |
| viewFlagValues |= FOCUSABLE_IN_TOUCH_MODE | FOCUSABLE; |
| viewFlagMasks |= FOCUSABLE_IN_TOUCH_MODE | FOCUSABLE_MASK; |
| } |
| break; |
| case com.android.internal.R.styleable.View_clickable: |
| if (a.getBoolean(attr, false)) { |
| viewFlagValues |= CLICKABLE; |
| viewFlagMasks |= CLICKABLE; |
| } |
| break; |
| case com.android.internal.R.styleable.View_longClickable: |
| if (a.getBoolean(attr, false)) { |
| viewFlagValues |= LONG_CLICKABLE; |
| viewFlagMasks |= LONG_CLICKABLE; |
| } |
| break; |
| case com.android.internal.R.styleable.View_saveEnabled: |
| if (!a.getBoolean(attr, true)) { |
| viewFlagValues |= SAVE_DISABLED; |
| viewFlagMasks |= SAVE_DISABLED_MASK; |
| } |
| break; |
| case com.android.internal.R.styleable.View_duplicateParentState: |
| if (a.getBoolean(attr, false)) { |
| viewFlagValues |= DUPLICATE_PARENT_STATE; |
| viewFlagMasks |= DUPLICATE_PARENT_STATE; |
| } |
| break; |
| case com.android.internal.R.styleable.View_visibility: |
| final int visibility = a.getInt(attr, 0); |
| if (visibility != 0) { |
| viewFlagValues |= VISIBILITY_FLAGS[visibility]; |
| viewFlagMasks |= VISIBILITY_MASK; |
| } |
| break; |
| case com.android.internal.R.styleable.View_layoutDirection: |
| // Clear any HORIZONTAL_DIRECTION flag already set |
| viewFlagValues &= ~LAYOUT_DIRECTION_MASK; |
| // Set the HORIZONTAL_DIRECTION flags depending on the value of the attribute |
| final int layoutDirection = a.getInt(attr, -1); |
| if (layoutDirection != -1) { |
| viewFlagValues |= LAYOUT_DIRECTION_FLAGS[layoutDirection]; |
| } else { |
| // Set to default (LAYOUT_DIRECTION_INHERIT) |
| viewFlagValues |= LAYOUT_DIRECTION_DEFAULT; |
| } |
| viewFlagMasks |= LAYOUT_DIRECTION_MASK; |
| break; |
| case com.android.internal.R.styleable.View_drawingCacheQuality: |
| final int cacheQuality = a.getInt(attr, 0); |
| if (cacheQuality != 0) { |
| viewFlagValues |= DRAWING_CACHE_QUALITY_FLAGS[cacheQuality]; |
| viewFlagMasks |= DRAWING_CACHE_QUALITY_MASK; |
| } |
| break; |
| case com.android.internal.R.styleable.View_contentDescription: |
| mContentDescription = a.getString(attr); |
| break; |
| case com.android.internal.R.styleable.View_soundEffectsEnabled: |
| if (!a.getBoolean(attr, true)) { |
| viewFlagValues &= ~SOUND_EFFECTS_ENABLED; |
| viewFlagMasks |= SOUND_EFFECTS_ENABLED; |
| } |
| break; |
| case com.android.internal.R.styleable.View_hapticFeedbackEnabled: |
| if (!a.getBoolean(attr, true)) { |
| viewFlagValues &= ~HAPTIC_FEEDBACK_ENABLED; |
| viewFlagMasks |= HAPTIC_FEEDBACK_ENABLED; |
| } |
| break; |
| case R.styleable.View_scrollbars: |
| final int scrollbars = a.getInt(attr, SCROLLBARS_NONE); |
| if (scrollbars != SCROLLBARS_NONE) { |
| viewFlagValues |= scrollbars; |
| viewFlagMasks |= SCROLLBARS_MASK; |
| initializeScrollbars(a); |
| } |
| break; |
| case R.styleable.View_fadingEdge: |
| final int fadingEdge = a.getInt(attr, FADING_EDGE_NONE); |
| if (fadingEdge != FADING_EDGE_NONE) { |
| viewFlagValues |= fadingEdge; |
| viewFlagMasks |= FADING_EDGE_MASK; |
| initializeFadingEdge(a); |
| } |
| break; |
| case R.styleable.View_scrollbarStyle: |
| scrollbarStyle = a.getInt(attr, SCROLLBARS_INSIDE_OVERLAY); |
| if (scrollbarStyle != SCROLLBARS_INSIDE_OVERLAY) { |
| viewFlagValues |= scrollbarStyle & SCROLLBARS_STYLE_MASK; |
| viewFlagMasks |= SCROLLBARS_STYLE_MASK; |
| } |
| break; |
| case R.styleable.View_isScrollContainer: |
| setScrollContainer = true; |
| if (a.getBoolean(attr, false)) { |
| setScrollContainer(true); |
| } |
| break; |
| case com.android.internal.R.styleable.View_keepScreenOn: |
| if (a.getBoolean(attr, false)) { |
| viewFlagValues |= KEEP_SCREEN_ON; |
| viewFlagMasks |= KEEP_SCREEN_ON; |
| } |
| break; |
| case R.styleable.View_filterTouchesWhenObscured: |
| if (a.getBoolean(attr, false)) { |
| viewFlagValues |= FILTER_TOUCHES_WHEN_OBSCURED; |
| viewFlagMasks |= FILTER_TOUCHES_WHEN_OBSCURED; |
| } |
| break; |
| case R.styleable.View_nextFocusLeft: |
| mNextFocusLeftId = a.getResourceId(attr, View.NO_ID); |
| break; |
| case R.styleable.View_nextFocusRight: |
| mNextFocusRightId = a.getResourceId(attr, View.NO_ID); |
| break; |
| case R.styleable.View_nextFocusUp: |
| mNextFocusUpId = a.getResourceId(attr, View.NO_ID); |
| break; |
| case R.styleable.View_nextFocusDown: |
| mNextFocusDownId = a.getResourceId(attr, View.NO_ID); |
| break; |
| case R.styleable.View_nextFocusForward: |
| mNextFocusForwardId = a.getResourceId(attr, View.NO_ID); |
| break; |
| case R.styleable.View_minWidth: |
| mMinWidth = a.getDimensionPixelSize(attr, 0); |
| break; |
| case R.styleable.View_minHeight: |
| mMinHeight = a.getDimensionPixelSize(attr, 0); |
| break; |
| case R.styleable.View_onClick: |
| if (context.isRestricted()) { |
| throw new IllegalStateException("The android:onClick attribute cannot " |
| + "be used within a restricted context"); |
| } |
| |
| final String handlerName = a.getString(attr); |
| if (handlerName != null) { |
| setOnClickListener(new OnClickListener() { |
| private Method mHandler; |
| |
| public void onClick(View v) { |
| if (mHandler == null) { |
| try { |
| mHandler = getContext().getClass().getMethod(handlerName, |
| View.class); |
| } catch (NoSuchMethodException e) { |
| int id = getId(); |
| String idText = id == NO_ID ? "" : " with id '" |
| + getContext().getResources().getResourceEntryName( |
| id) + "'"; |
| throw new IllegalStateException("Could not find a method " + |
| handlerName + "(View) in the activity " |
| + getContext().getClass() + " for onClick handler" |
| + " on view " + View.this.getClass() + idText, e); |
| } |
| } |
| |
| try { |
| mHandler.invoke(getContext(), View.this); |
| } catch (IllegalAccessException e) { |
| throw new IllegalStateException("Could not execute non " |
| + "public method of the activity", e); |
| } catch (InvocationTargetException e) { |
| throw new IllegalStateException("Could not execute " |
| + "method of the activity", e); |
| } |
| } |
| }); |
| } |
| break; |
| case R.styleable.View_overScrollMode: |
| overScrollMode = a.getInt(attr, OVER_SCROLL_IF_CONTENT_SCROLLS); |
| break; |
| case R.styleable.View_verticalScrollbarPosition: |
| mVerticalScrollbarPosition = a.getInt(attr, SCROLLBAR_POSITION_DEFAULT); |
| break; |
| case R.styleable.View_layerType: |
| setLayerType(a.getInt(attr, LAYER_TYPE_NONE), null); |
| break; |
| case R.styleable.View_textDirection: |
| mTextDirection = a.getInt(attr, DEFAULT_TEXT_DIRECTION); |
| break; |
| } |
| } |
| |
| setOverScrollMode(overScrollMode); |
| |
| if (background != null) { |
| setBackgroundDrawable(background); |
| } |
| |
| mUserPaddingRelative = (startPadding >= 0 || endPadding >= 0); |
| |
| // Cache user padding as we cannot fully resolve padding here (we dont have yet the resolved |
| // layout direction). Those cached values will be used later during padding resolution. |
| mUserPaddingStart = startPadding; |
| mUserPaddingEnd = endPadding; |
| |
| if (padding >= 0) { |
| leftPadding = padding; |
| topPadding = padding; |
| rightPadding = padding; |
| bottomPadding = padding; |
| } |
| |
| // If the user specified the padding (either with android:padding or |
| // android:paddingLeft/Top/Right/Bottom), use this padding, otherwise |
| // use the default padding or the padding from the background drawable |
| // (stored at this point in mPadding*) |
| setPadding(leftPadding >= 0 ? leftPadding : mPaddingLeft, |
| topPadding >= 0 ? topPadding : mPaddingTop, |
| rightPadding >= 0 ? rightPadding : mPaddingRight, |
| bottomPadding >= 0 ? bottomPadding : mPaddingBottom); |
| |
| if (viewFlagMasks != 0) { |
| setFlags(viewFlagValues, viewFlagMasks); |
| } |
| |
| // Needs to be called after mViewFlags is set |
| if (scrollbarStyle != SCROLLBARS_INSIDE_OVERLAY) { |
| recomputePadding(); |
| } |
| |
| if (x != 0 || y != 0) { |
| scrollTo(x, y); |
| } |
| |
| if (transformSet) { |
| setTranslationX(tx); |
| setTranslationY(ty); |
| setRotation(rotation); |
| setRotationX(rotationX); |
| setRotationY(rotationY); |
| setScaleX(sx); |
| setScaleY(sy); |
| } |
| |
| if (!setScrollContainer && (viewFlagValues&SCROLLBARS_VERTICAL) != 0) { |
| setScrollContainer(true); |
| } |
| |
| computeOpaqueFlags(); |
| |
| a.recycle(); |
| } |
| |
| /** |
| * Non-public constructor for use in testing |
| */ |
| View() { |
| } |
| |
| /** |
| * <p> |
| * Initializes the fading edges from a given set of styled attributes. This |
| * method should be called by subclasses that need fading edges and when an |
| * instance of these subclasses is created programmatically rather than |
| * being inflated from XML. This method is automatically called when the XML |
| * is inflated. |
| * </p> |
| * |
| * @param a the styled attributes set to initialize the fading edges from |
| */ |
| protected void initializeFadingEdge(TypedArray a) { |
| initScrollCache(); |
| |
| mScrollCache.fadingEdgeLength = a.getDimensionPixelSize( |
| R.styleable.View_fadingEdgeLength, |
| ViewConfiguration.get(mContext).getScaledFadingEdgeLength()); |
| } |
| |
| /** |
| * Returns the size of the vertical faded edges used to indicate that more |
| * content in this view is visible. |
| * |
| * @return The size in pixels of the vertical faded edge or 0 if vertical |
| * faded edges are not enabled for this view. |
| * @attr ref android.R.styleable#View_fadingEdgeLength |
| */ |
| public int getVerticalFadingEdgeLength() { |
| if (isVerticalFadingEdgeEnabled()) { |
| ScrollabilityCache cache = mScrollCache; |
| if (cache != null) { |
| return cache.fadingEdgeLength; |
| } |
| } |
| return 0; |
| } |
| |
| /** |
| * Set the size of the faded edge used to indicate that more content in this |
| * view is available. Will not change whether the fading edge is enabled; use |
| * {@link #setVerticalFadingEdgeEnabled(boolean)} or |
| * {@link #setHorizontalFadingEdgeEnabled(boolean)} to enable the fading edge |
| * for the vertical or horizontal fading edges. |
| * |
| * @param length The size in pixels of the faded edge used to indicate that more |
| * content in this view is visible. |
| */ |
| public void setFadingEdgeLength(int length) { |
| initScrollCache(); |
| mScrollCache.fadingEdgeLength = length; |
| } |
| |
| /** |
| * Returns the size of the horizontal faded edges used to indicate that more |
| * content in this view is visible. |
| * |
| * @return The size in pixels of the horizontal faded edge or 0 if horizontal |
| * faded edges are not enabled for this view. |
| * @attr ref android.R.styleable#View_fadingEdgeLength |
| */ |
| public int getHorizontalFadingEdgeLength() { |
| if (isHorizontalFadingEdgeEnabled()) { |
| ScrollabilityCache cache = mScrollCache; |
| if (cache != null) { |
| return cache.fadingEdgeLength; |
| } |
| } |
| return 0; |
| } |
| |
| /** |
| * Returns the width of the vertical scrollbar. |
| * |
| * @return The width in pixels of the vertical scrollbar or 0 if there |
| * is no vertical scrollbar. |
| */ |
| public int getVerticalScrollbarWidth() { |
| ScrollabilityCache cache = mScrollCache; |
| if (cache != null) { |
| ScrollBarDrawable scrollBar = cache.scrollBar; |
| if (scrollBar != null) { |
| int size = scrollBar.getSize(true); |
| if (size <= 0) { |
| size = cache.scrollBarSize; |
| } |
| return size; |
| } |
| return 0; |
| } |
| return 0; |
| } |
| |
| /** |
| * Returns the height of the horizontal scrollbar. |
| * |
| * @return The height in pixels of the horizontal scrollbar or 0 if |
| * there is no horizontal scrollbar. |
| */ |
| protected int getHorizontalScrollbarHeight() { |
| ScrollabilityCache cache = mScrollCache; |
| if (cache != null) { |
| ScrollBarDrawable scrollBar = cache.scrollBar; |
| if (scrollBar != null) { |
| int size = scrollBar.getSize(false); |
| if (size <= 0) { |
| size = cache.scrollBarSize; |
| } |
| return size; |
| } |
| return 0; |
| } |
| return 0; |
| } |
| |
| /** |
| * <p> |
| * Initializes the scrollbars from a given set of styled attributes. This |
| * method should be called by subclasses that need scrollbars and when an |
| * instance of these subclasses is created programmatically rather than |
| * being inflated from XML. This method is automatically called when the XML |
| * is inflated. |
| * </p> |
| * |
| * @param a the styled attributes set to initialize the scrollbars from |
| */ |
| protected void initializeScrollbars(TypedArray a) { |
| initScrollCache(); |
| |
| final ScrollabilityCache scrollabilityCache = mScrollCache; |
| |
| if (scrollabilityCache.scrollBar == null) { |
| scrollabilityCache.scrollBar = new ScrollBarDrawable(); |
| } |
| |
| final boolean fadeScrollbars = a.getBoolean(R.styleable.View_fadeScrollbars, true); |
| |
| if (!fadeScrollbars) { |
| scrollabilityCache.state = ScrollabilityCache.ON; |
| } |
| scrollabilityCache.fadeScrollBars = fadeScrollbars; |
| |
| |
| scrollabilityCache.scrollBarFadeDuration = a.getInt( |
| R.styleable.View_scrollbarFadeDuration, ViewConfiguration |
| .getScrollBarFadeDuration()); |
| scrollabilityCache.scrollBarDefaultDelayBeforeFade = a.getInt( |
| R.styleable.View_scrollbarDefaultDelayBeforeFade, |
| ViewConfiguration.getScrollDefaultDelay()); |
| |
| |
| scrollabilityCache.scrollBarSize = a.getDimensionPixelSize( |
| com.android.internal.R.styleable.View_scrollbarSize, |
| ViewConfiguration.get(mContext).getScaledScrollBarSize()); |
| |
| Drawable track = a.getDrawable(R.styleable.View_scrollbarTrackHorizontal); |
| scrollabilityCache.scrollBar.setHorizontalTrackDrawable(track); |
| |
| Drawable thumb = a.getDrawable(R.styleable.View_scrollbarThumbHorizontal); |
| if (thumb != null) { |
| scrollabilityCache.scrollBar.setHorizontalThumbDrawable(thumb); |
| } |
| |
| boolean alwaysDraw = a.getBoolean(R.styleable.View_scrollbarAlwaysDrawHorizontalTrack, |
| false); |
| if (alwaysDraw) { |
| scrollabilityCache.scrollBar.setAlwaysDrawHorizontalTrack(true); |
| } |
| |
| track = a.getDrawable(R.styleable.View_scrollbarTrackVertical); |
| scrollabilityCache.scrollBar.setVerticalTrackDrawable(track); |
| |
| thumb = a.getDrawable(R.styleable.View_scrollbarThumbVertical); |
| if (thumb != null) { |
| scrollabilityCache.scrollBar.setVerticalThumbDrawable(thumb); |
| } |
| |
| alwaysDraw = a.getBoolean(R.styleable.View_scrollbarAlwaysDrawVerticalTrack, |
| false); |
| if (alwaysDraw) { |
| scrollabilityCache.scrollBar.setAlwaysDrawVerticalTrack(true); |
| } |
| |
| // Re-apply user/background padding so that scrollbar(s) get added |
| resolvePadding(); |
| } |
| |
| /** |
| * <p> |
| * Initalizes the scrollability cache if necessary. |
| * </p> |
| */ |
| private void initScrollCache() { |
| if (mScrollCache == null) { |
| mScrollCache = new ScrollabilityCache(ViewConfiguration.get(mContext), this); |
| } |
| } |
| |
| /** |
| * Set the position of the vertical scroll bar. Should be one of |
| * {@link #SCROLLBAR_POSITION_DEFAULT}, {@link #SCROLLBAR_POSITION_LEFT} or |
| * {@link #SCROLLBAR_POSITION_RIGHT}. |
| * |
| * @param position Where the vertical scroll bar should be positioned. |
| */ |
| public void setVerticalScrollbarPosition(int position) { |
| if (mVerticalScrollbarPosition != position) { |
| mVerticalScrollbarPosition = position; |
| computeOpaqueFlags(); |
| resolvePadding(); |
| } |
| } |
| |
| /** |
| * @return The position where the vertical scroll bar will show, if applicable. |
| * @see #setVerticalScrollbarPosition(int) |
| */ |
| public int getVerticalScrollbarPosition() { |
| return mVerticalScrollbarPosition; |
| } |
| |
| /** |
| * Register a callback to be invoked when focus of this view changed. |
| * |
| * @param l The callback that will run. |
| */ |
| public void setOnFocusChangeListener(OnFocusChangeListener l) { |
| mOnFocusChangeListener = l; |
| } |
| |
| /** |
| * Add a listener that will be called when the bounds of the view change due to |
| * layout processing. |
| * |
| * @param listener The listener that will be called when layout bounds change. |
| */ |
| public void addOnLayoutChangeListener(OnLayoutChangeListener listener) { |
| if (mOnLayoutChangeListeners == null) { |
| mOnLayoutChangeListeners = new ArrayList<OnLayoutChangeListener>(); |
| } |
| mOnLayoutChangeListeners.add(listener); |
| } |
| |
| /** |
| * Remove a listener for layout changes. |
| * |
| * @param listener The listener for layout bounds change. |
| */ |
| public void removeOnLayoutChangeListener(OnLayoutChangeListener listener) { |
| if (mOnLayoutChangeListeners == null) { |
| return; |
| } |
| mOnLayoutChangeListeners.remove(listener); |
| } |
| |
| /** |
| * Add a listener for attach state changes. |
| * |
| * This listener will be called whenever this view is attached or detached |
| * from a window. Remove the listener using |
| * {@link #removeOnAttachStateChangeListener(OnAttachStateChangeListener)}. |
| * |
| * @param listener Listener to attach |
| * @see #removeOnAttachStateChangeListener(OnAttachStateChangeListener) |
| */ |
| public void addOnAttachStateChangeListener(OnAttachStateChangeListener listener) { |
| if (mOnAttachStateChangeListeners == null) { |
| mOnAttachStateChangeListeners = new CopyOnWriteArrayList<OnAttachStateChangeListener>(); |
| } |
| mOnAttachStateChangeListeners.add(listener); |
| } |
| |
| /** |
| * Remove a listener for attach state changes. The listener will receive no further |
| * notification of window attach/detach events. |
| * |
| * @param listener Listener to remove |
| * @see #addOnAttachStateChangeListener(OnAttachStateChangeListener) |
| */ |
| public void removeOnAttachStateChangeListener(OnAttachStateChangeListener listener) { |
| if (mOnAttachStateChangeListeners == null) { |
| return; |
| } |
| mOnAttachStateChangeListeners.remove(listener); |
| } |
| |
| /** |
| * Returns the focus-change callback registered for this view. |
| * |
| * @return The callback, or null if one is not registered. |
| */ |
| public OnFocusChangeListener getOnFocusChangeListener() { |
| return mOnFocusChangeListener; |
| } |
| |
| /** |
| * Register a callback to be invoked when this view is clicked. If this view is not |
| * clickable, it becomes clickable. |
| * |
| * @param l The callback that will run |
| * |
| * @see #setClickable(boolean) |
| */ |
| public void setOnClickListener(OnClickListener l) { |
| if (!isClickable()) { |
| setClickable(true); |
| } |
| mOnClickListener = l; |
| } |
| |
| /** |
| * Register a callback to be invoked when this view is clicked and held. If this view is not |
| * long clickable, it becomes long clickable. |
| * |
| * @param l The callback that will run |
| * |
| * @see #setLongClickable(boolean) |
| */ |
| public void setOnLongClickListener(OnLongClickListener l) { |
| if (!isLongClickable()) { |
| setLongClickable(true); |
| } |
| mOnLongClickListener = l; |
| } |
| |
| /** |
| * Register a callback to be invoked when the context menu for this view is |
| * being built. If this view is not long clickable, it becomes long clickable. |
| * |
| * @param l The callback that will run |
| * |
| */ |
| public void setOnCreateContextMenuListener(OnCreateContextMenuListener l) { |
| if (!isLongClickable()) { |
| setLongClickable(true); |
| } |
| mOnCreateContextMenuListener = l; |
| } |
| |
| /** |
| * Call this view's OnClickListener, if it is defined. |
| * |
| * @return True there was an assigned OnClickListener that was called, false |
| * otherwise is returned. |
| */ |
| public boolean performClick() { |
| sendAccessibilityEvent(AccessibilityEvent.TYPE_VIEW_CLICKED); |
| |
| if (mOnClickListener != null) { |
| playSoundEffect(SoundEffectConstants.CLICK); |
| mOnClickListener.onClick(this); |
| return true; |
| } |
| |
| return false; |
| } |
| |
| /** |
| * Call this view's OnLongClickListener, if it is defined. Invokes the context menu if the |
| * OnLongClickListener did not consume the event. |
| * |
| * @return True if one of the above receivers consumed the event, false otherwise. |
| */ |
| public boolean performLongClick() { |
| sendAccessibilityEvent(AccessibilityEvent.TYPE_VIEW_LONG_CLICKED); |
| |
| boolean handled = false; |
| if (mOnLongClickListener != null) { |
| handled = mOnLongClickListener.onLongClick(View.this); |
| } |
| if (!handled) { |
| handled = showContextMenu(); |
| } |
| if (handled) { |
| performHapticFeedback(HapticFeedbackConstants.LONG_PRESS); |
| } |
| return handled; |
| } |
| |
| /** |
| * Performs button-related actions during a touch down event. |
| * |
| * @param event The event. |
| * @return True if the down was consumed. |
| * |
| * @hide |
| */ |
| protected boolean performButtonActionOnTouchDown(MotionEvent event) { |
| if ((event.getButtonState() & MotionEvent.BUTTON_SECONDARY) != 0) { |
| if (showContextMenu(event.getX(), event.getY(), event.getMetaState())) { |
| return true; |
| } |
| } |
| return false; |
| } |
| |
| /** |
| * Bring up the context menu for this view. |
| * |
| * @return Whether a context menu was displayed. |
| */ |
| public boolean showContextMenu() { |
| return getParent().showContextMenuForChild(this); |
| } |
| |
| /** |
| * Bring up the context menu for this view, referring to the item under the specified point. |
| * |
| * @param x The referenced x coordinate. |
| * @param y The referenced y coordinate. |
| * @param metaState The keyboard modifiers that were pressed. |
| * @return Whether a context menu was displayed. |
| * |
| * @hide |
| */ |
| public boolean showContextMenu(float x, float y, int metaState) { |
| return showContextMenu(); |
| } |
| |
| /** |
| * Start an action mode. |
| * |
| * @param callback Callback that will control the lifecycle of the action mode |
| * @return The new action mode if it is started, null otherwise |
| * |
| * @see ActionMode |
| */ |
| public ActionMode startActionMode(ActionMode.Callback callback) { |
| return getParent().startActionModeForChild(this, callback); |
| } |
| |
| /** |
| * Register a callback to be invoked when a key is pressed in this view. |
| * @param l the key listener to attach to this view |
| */ |
| public void setOnKeyListener(OnKeyListener l) { |
| mOnKeyListener = l; |
| } |
| |
| /** |
| * Register a callback to be invoked when a touch event is sent to this view. |
| * @param l the touch listener to attach to this view |
| */ |
| public void setOnTouchListener(OnTouchListener l) { |
| mOnTouchListener = l; |
| } |
| |
| /** |
| * Register a callback to be invoked when a generic motion event is sent to this view. |
| * @param l the generic motion listener to attach to this view |
| */ |
| public void setOnGenericMotionListener(OnGenericMotionListener l) { |
| mOnGenericMotionListener = l; |
| } |
| |
| /** |
| * Register a callback to be invoked when a hover event is sent to this view. |
| * @param l the hover listener to attach to this view |
| */ |
| public void setOnHoverListener(OnHoverListener l) { |
| mOnHoverListener = l; |
| } |
| |
| /** |
| * Register a drag event listener callback object for this View. The parameter is |
| * an implementation of {@link android.view.View.OnDragListener}. To send a drag event to a |
| * View, the system calls the |
| * {@link android.view.View.OnDragListener#onDrag(View,DragEvent)} method. |
| * @param l An implementation of {@link android.view.View.OnDragListener}. |
| */ |
| public void setOnDragListener(OnDragListener l) { |
| mOnDragListener = l; |
| } |
| |
| /** |
| * Give this view focus. This will cause |
| * {@link #onFocusChanged(boolean, int, android.graphics.Rect)} to be called. |
| * |
| * Note: this does not check whether this {@link View} should get focus, it just |
| * gives it focus no matter what. It should only be called internally by framework |
| * code that knows what it is doing, namely {@link #requestFocus(int, Rect)}. |
| * |
| * @param direction values are {@link View#FOCUS_UP}, {@link View#FOCUS_DOWN}, |
| * {@link View#FOCUS_LEFT} or {@link View#FOCUS_RIGHT}. This is the direction which |
| * focus moved when requestFocus() is called. It may not always |
| * apply, in which case use the default View.FOCUS_DOWN. |
| * @param previouslyFocusedRect The rectangle of the view that had focus |
| * prior in this View's coordinate system. |
| */ |
| void handleFocusGainInternal(int direction, Rect previouslyFocusedRect) { |
| if (DBG) { |
| System.out.println(this + " requestFocus()"); |
| } |
| |
| if ((mPrivateFlags & FOCUSED) == 0) { |
| mPrivateFlags |= FOCUSED; |
| |
| if (mParent != null) { |
| mParent.requestChildFocus(this, this); |
| } |
| |
| onFocusChanged(true, direction, previouslyFocusedRect); |
| refreshDrawableState(); |
| } |
| } |
| |
| /** |
| * Request that a rectangle of this view be visible on the screen, |
| * scrolling if necessary just enough. |
| * |
| * <p>A View should call this if it maintains some notion of which part |
| * of its content is interesting. For example, a text editing view |
| * should call this when its cursor moves. |
| * |
| * @param rectangle The rectangle. |
| * @return Whether any parent scrolled. |
| */ |
| public boolean requestRectangleOnScreen(Rect rectangle) { |
| return requestRectangleOnScreen(rectangle, false); |
| } |
| |
| /** |
| * Request that a rectangle of this view be visible on the screen, |
| * scrolling if necessary just enough. |
| * |
| * <p>A View should call this if it maintains some notion of which part |
| * of its content is interesting. For example, a text editing view |
| * should call this when its cursor moves. |
| * |
| * <p>When <code>immediate</code> is set to true, scrolling will not be |
| * animated. |
| * |
| * @param rectangle The rectangle. |
| * @param immediate True to forbid animated scrolling, false otherwise |
| * @return Whether any parent scrolled. |
| */ |
| public boolean requestRectangleOnScreen(Rect rectangle, boolean immediate) { |
| View child = this; |
| ViewParent parent = mParent; |
| boolean scrolled = false; |
| while (parent != null) { |
| scrolled |= parent.requestChildRectangleOnScreen(child, |
| rectangle, immediate); |
| |
| // offset rect so next call has the rectangle in the |
| // coordinate system of its direct child. |
| rectangle.offset(child.getLeft(), child.getTop()); |
| rectangle.offset(-child.getScrollX(), -child.getScrollY()); |
| |
| if (!(parent instanceof View)) { |
| break; |
| } |
| |
| child = (View) parent; |
| parent = child.getParent(); |
| } |
| return scrolled; |
| } |
| |
| /** |
| * Called when this view wants to give up focus. This will cause |
| * {@link #onFocusChanged(boolean, int, android.graphics.Rect)} to be called. |
| */ |
| public void clearFocus() { |
| if (DBG) { |
| System.out.println(this + " clearFocus()"); |
| } |
| |
| if ((mPrivateFlags & FOCUSED) != 0) { |
| mPrivateFlags &= ~FOCUSED; |
| |
| if (mParent != null) { |
| mParent.clearChildFocus(this); |
| } |
| |
| onFocusChanged(false, 0, null); |
| refreshDrawableState(); |
| } |
| } |
| |
| /** |
| * Called to clear the focus of a view that is about to be removed. |
| * Doesn't call clearChildFocus, which prevents this view from taking |
| * focus again before it has been removed from the parent |
| */ |
| void clearFocusForRemoval() { |
| if ((mPrivateFlags & FOCUSED) != 0) { |
| mPrivateFlags &= ~FOCUSED; |
| |
| onFocusChanged(false, 0, null); |
| refreshDrawableState(); |
| } |
| } |
| |
| /** |
| * Called internally by the view system when a new view is getting focus. |
| * This is what clears the old focus. |
| */ |
| void unFocus() { |
| if (DBG) { |
| System.out.println(this + " unFocus()"); |
| } |
| |
| if ((mPrivateFlags & FOCUSED) != 0) { |
| mPrivateFlags &= ~FOCUSED; |
| |
| onFocusChanged(false, 0, null); |
| refreshDrawableState(); |
| } |
| } |
| |
| /** |
| * Returns true if this view has focus iteself, or is the ancestor of the |
| * view that has focus. |
| * |
| * @return True if this view has or contains focus, false otherwise. |
| */ |
| @ViewDebug.ExportedProperty(category = "focus") |
| public boolean hasFocus() { |
| return (mPrivateFlags & FOCUSED) != 0; |
| } |
| |
| /** |
| * Returns true if this view is focusable or if it contains a reachable View |
| * for which {@link #hasFocusable()} returns true. A "reachable hasFocusable()" |
| * is a View whose parents do not block descendants focus. |
| * |
| * Only {@link #VISIBLE} views are considered focusable. |
| * |
| * @return True if the view is focusable or if the view contains a focusable |
| * View, false otherwise. |
| * |
| * @see ViewGroup#FOCUS_BLOCK_DESCENDANTS |
| */ |
| public boolean hasFocusable() { |
| return (mViewFlags & VISIBILITY_MASK) == VISIBLE && isFocusable(); |
| } |
| |
| /** |
| * Called by the view system when the focus state of this view changes. |
| * When the focus change event is caused by directional navigation, direction |
| * and previouslyFocusedRect provide insight into where the focus is coming from. |
| * When overriding, be sure to call up through to the super class so that |
| * the standard focus handling will occur. |
| * |
| * @param gainFocus True if the View has focus; false otherwise. |
| * @param direction The direction focus has moved when requestFocus() |
| * is called to give this view focus. Values are |
| * {@link #FOCUS_UP}, {@link #FOCUS_DOWN}, {@link #FOCUS_LEFT}, |
| * {@link #FOCUS_RIGHT}, {@link #FOCUS_FORWARD}, or {@link #FOCUS_BACKWARD}. |
| * It may not always apply, in which case use the default. |
| * @param previouslyFocusedRect The rectangle, in this view's coordinate |
| * system, of the previously focused view. If applicable, this will be |
| * passed in as finer grained information about where the focus is coming |
| * from (in addition to direction). Will be <code>null</code> otherwise. |
| */ |
| protected void onFocusChanged(boolean gainFocus, int direction, Rect previouslyFocusedRect) { |
| if (gainFocus) { |
| sendAccessibilityEvent(AccessibilityEvent.TYPE_VIEW_FOCUSED); |
| } |
| |
| InputMethodManager imm = InputMethodManager.peekInstance(); |
| if (!gainFocus) { |
| if (isPressed()) { |
| setPressed(false); |
| } |
| if (imm != null && mAttachInfo != null |
| && mAttachInfo.mHasWindowFocus) { |
| imm.focusOut(this); |
| } |
| onFocusLost(); |
| } else if (imm != null && mAttachInfo != null |
| && mAttachInfo.mHasWindowFocus) { |
| imm.focusIn(this); |
| } |
| |
| invalidate(true); |
| if (mOnFocusChangeListener != null) { |
| mOnFocusChangeListener.onFocusChange(this, gainFocus); |
| } |
| |
| if (mAttachInfo != null) { |
| mAttachInfo.mKeyDispatchState.reset(this); |
| } |
| } |
| |
| /** |
| * Sends an accessibility event of the given type. If accessiiblity is |
| * not enabled this method has no effect. The default implementation calls |
| * {@link #onInitializeAccessibilityEvent(AccessibilityEvent)} first |
| * to populate information about the event source (this View), then calls |
| * {@link #dispatchPopulateAccessibilityEvent(AccessibilityEvent)} to |
| * populate the text content of the event source including its descendants, |
| * and last calls |
| * {@link ViewParent#requestSendAccessibilityEvent(View, AccessibilityEvent)} |
| * on its parent to resuest sending of the event to interested parties. |
| * |
| * @param eventType The type of the event to send. |
| * |
| * @see #onInitializeAccessibilityEvent(AccessibilityEvent) |
| * @see #dispatchPopulateAccessibilityEvent(AccessibilityEvent) |
| * @see ViewParent#requestSendAccessibilityEvent(View, AccessibilityEvent) |
| */ |
| public void sendAccessibilityEvent(int eventType) { |
| if (AccessibilityManager.getInstance(mContext).isEnabled()) { |
| sendAccessibilityEventUnchecked(AccessibilityEvent.obtain(eventType)); |
| } |
| } |
| |
| /** |
| * This method behaves exactly as {@link #sendAccessibilityEvent(int)} but |
| * takes as an argument an empty {@link AccessibilityEvent} and does not |
| * perfrom a check whether accessibility is enabled. |
| * |
| * @param event The event to send. |
| * |
| * @see #sendAccessibilityEvent(int) |
| */ |
| public void sendAccessibilityEventUnchecked(AccessibilityEvent event) { |
| if (!isShown()) { |
| return; |
| } |
| onInitializeAccessibilityEvent(event); |
| dispatchPopulateAccessibilityEvent(event); |
| // In the beginning we called #isShown(), so we know that getParent() is not null. |
| getParent().requestSendAccessibilityEvent(this, event); |
| } |
| |
| /** |
| * Dispatches an {@link AccessibilityEvent} to the {@link View} first and then |
| * to its children for adding their text content to the event. Note that the |
| * event text is populated in a separate dispatch path since we add to the |
| * event not only the text of the source but also the text of all its descendants. |
| * </p> |
| * A typical implementation will call |
| * {@link #onPopulateAccessibilityEvent(AccessibilityEvent)} on the this view |
| * and then call the {@link #dispatchPopulateAccessibilityEvent(AccessibilityEvent)} |
| * on each child. Override this method if custom population of the event text |
| * content is required. |
| * |
| * @param event The event. |
| * |
| * @return True if the event population was completed. |
| */ |
| public boolean dispatchPopulateAccessibilityEvent(AccessibilityEvent event) { |
| onPopulateAccessibilityEvent(event); |
| return false; |
| } |
| |
| /** |
| * Called from {@link #dispatchPopulateAccessibilityEvent(AccessibilityEvent)} |
| * giving a chance to this View to populate the accessibility event with its |
| * text content. While the implementation is free to modify other event |
| * attributes this should be performed in |
| * {@link #onInitializeAccessibilityEvent(AccessibilityEvent)}. |
| * <p> |
| * Example: Adding formatted date string to an accessibility event in addition |
| * to the text added by the super implementation. |
| * </p><p><pre><code> |
| * public void onPopulateAccessibilityEvent(AccessibilityEvent event) { |
| * super.onPopulateAccessibilityEvent(event); |
| * final int flags = DateUtils.FORMAT_SHOW_DATE | DateUtils.FORMAT_SHOW_WEEKDAY; |
| * String selectedDateUtterance = DateUtils.formatDateTime(mContext, |
| * mCurrentDate.getTimeInMillis(), flags); |
| * event.getText().add(selectedDateUtterance); |
| * } |
| * </code></pre></p> |
| * |
| * @param event The accessibility event which to populate. |
| * |
| * @see #sendAccessibilityEvent(int) |
| * @see #dispatchPopulateAccessibilityEvent(AccessibilityEvent) |
| */ |
| public void onPopulateAccessibilityEvent(AccessibilityEvent event) { |
| } |
| |
| /** |
| * Initializes an {@link AccessibilityEvent} with information about the |
| * the type of the event and this View which is the event source. In other |
| * words, the source of an accessibility event is the view whose state |
| * change triggered firing the event. |
| * <p> |
| * Example: Setting the password property of an event in addition |
| * to properties set by the super implementation. |
| * </p><p><pre><code> |
| * public void onInitializeAccessibilityEvent(AccessibilityEvent event) { |
| * super.onInitializeAccessibilityEvent(event); |
| * event.setPassword(true); |
| * } |
| * </code></pre></p> |
| * @param event The event to initialeze. |
| * |
| * @see #sendAccessibilityEvent(int) |
| * @see #dispatchPopulateAccessibilityEvent(AccessibilityEvent) |
| */ |
| public void onInitializeAccessibilityEvent(AccessibilityEvent event) { |
| event.setSource(this); |
| event.setClassName(getClass().getName()); |
| event.setPackageName(getContext().getPackageName()); |
| event.setEnabled(isEnabled()); |
| event.setContentDescription(mContentDescription); |
| |
| final int eventType = event.getEventType(); |
| switch (eventType) { |
| case AccessibilityEvent.TYPE_VIEW_FOCUSED: { |
| if (mAttachInfo != null) { |
| ArrayList<View> focusablesTempList = mAttachInfo.mFocusablesTempList; |
| getRootView().addFocusables(focusablesTempList, View.FOCUS_FORWARD, |
| FOCUSABLES_ALL); |
| event.setItemCount(focusablesTempList.size()); |
| event.setCurrentItemIndex(focusablesTempList.indexOf(this)); |
| focusablesTempList.clear(); |
| } |
| } break; |
| case AccessibilityEvent.TYPE_VIEW_SCROLLED: { |
| event.setScrollX(mScrollX); |
| event.setScrollY(mScrollY); |
| event.setItemCount(getHeight()); |
| } break; |
| } |
| } |
| |
| /** |
| * Returns an {@link AccessibilityNodeInfo} representing this view from the |
| * point of view of an {@link android.accessibilityservice.AccessibilityService}. |
| * This method is responsible for obtaining an accessibility node info from a |
| * pool of reusable instances and calling |
| * {@link #onInitializeAccessibilityNodeInfo(AccessibilityNodeInfo)} on this view to |
| * initialize the former. |
| * <p> |
| * Note: The client is responsible for recycling the obtained instance by calling |
| * {@link AccessibilityNodeInfo#recycle()} to minimize object creation. |
| * </p> |
| * @return A populated {@link AccessibilityNodeInfo}. |
| * |
| * @see AccessibilityNodeInfo |
| */ |
| public AccessibilityNodeInfo createAccessibilityNodeInfo() { |
| AccessibilityNodeInfo info = AccessibilityNodeInfo.obtain(this); |
| onInitializeAccessibilityNodeInfo(info); |
| return info; |
| } |
| |
| /** |
| * Initializes an {@link AccessibilityNodeInfo} with information about this view. |
| * The base implementation sets: |
| * <ul> |
| * <li>{@link AccessibilityNodeInfo#setParent(View)},</li> |
| * <li>{@link AccessibilityNodeInfo#setBoundsInParent(Rect)},</li> |
| * <li>{@link AccessibilityNodeInfo#setBoundsInScreen(Rect)},</li> |
| * <li>{@link AccessibilityNodeInfo#setPackageName(CharSequence)},</li> |
| * <li>{@link AccessibilityNodeInfo#setClassName(CharSequence)},</li> |
| * <li>{@link AccessibilityNodeInfo#setContentDescription(CharSequence)},</li> |
| * <li>{@link AccessibilityNodeInfo#setEnabled(boolean)},</li> |
| * <li>{@link AccessibilityNodeInfo#setClickable(boolean)},</li> |
| * <li>{@link AccessibilityNodeInfo#setFocusable(boolean)},</li> |
| * <li>{@link AccessibilityNodeInfo#setFocused(boolean)},</li> |
| * <li>{@link AccessibilityNodeInfo#setLongClickable(boolean)},</li> |
| * <li>{@link AccessibilityNodeInfo#setSelected(boolean)},</li> |
| * </ul> |
| * <p> |
| * Subclasses should override this method, call the super implementation, |
| * and set additional attributes. |
| * </p> |
| * @param info The instance to initialize. |
| */ |
| public void onInitializeAccessibilityNodeInfo(AccessibilityNodeInfo info) { |
| Rect bounds = mAttachInfo.mTmpInvalRect; |
| getDrawingRect(bounds); |
| info.setBoundsInParent(bounds); |
| |
| int[] locationOnScreen = mAttachInfo.mInvalidateChildLocation; |
| getLocationOnScreen(locationOnScreen); |
| bounds.offset(locationOnScreen[0], locationOnScreen[1]); |
| info.setBoundsInScreen(bounds); |
| |
| ViewParent parent = getParent(); |
| if (parent instanceof View) { |
| View parentView = (View) parent; |
| info.setParent(parentView); |
| } |
| |
| info.setPackageName(mContext.getPackageName()); |
| info.setClassName(getClass().getName()); |
| info.setContentDescription(getContentDescription()); |
| |
| info.setEnabled(isEnabled()); |
| info.setClickable(isClickable()); |
| info.setFocusable(isFocusable()); |
| info.setFocused(isFocused()); |
| info.setSelected(isSelected()); |
| info.setLongClickable(isLongClickable()); |
| |
| // TODO: These make sense only if we are in an AdapterView but all |
| // views can be selected. Maybe from accessiiblity perspective |
| // we should report as selectable view in an AdapterView. |
| info.addAction(AccessibilityNodeInfo.ACTION_SELECT); |
| info.addAction(AccessibilityNodeInfo.ACTION_CLEAR_SELECTION); |
| |
| if (isFocusable()) { |
| if (isFocused()) { |
| info.addAction(AccessibilityNodeInfo.ACTION_CLEAR_FOCUS); |
| } else { |
| info.addAction(AccessibilityNodeInfo.ACTION_FOCUS); |
| } |
| } |
| } |
| |
| /** |
| * Gets the unique identifier of this view on the screen for accessibility purposes. |
| * If this {@link View} is not attached to any window, {@value #NO_ID} is returned. |
| * |
| * @return The view accessibility id. |
| * |
| * @hide |
| */ |
| public int getAccessibilityViewId() { |
| if (mAccessibilityViewId == NO_ID) { |
| mAccessibilityViewId = sNextAccessibilityViewId++; |
| } |
| return mAccessibilityViewId; |
| } |
| |
| /** |
| * Gets the unique identifier of the window in which this View reseides. |
| * |
| * @return The window accessibility id. |
| * |
| * @hide |
| */ |
| public int getAccessibilityWindowId() { |
| return mAttachInfo != null ? mAttachInfo.mAccessibilityWindowId : NO_ID; |
| } |
| |
| /** |
| * Gets the {@link View} description. It briefly describes the view and is |
| * primarily used for accessibility support. Set this property to enable |
| * better accessibility support for your application. This is especially |
| * true for views that do not have textual representation (For example, |
| * ImageButton). |
| * |
| * @return The content descriptiopn. |
| * |
| * @attr ref android.R.styleable#View_contentDescription |
| */ |
| public CharSequence getContentDescription() { |
| return mContentDescription; |
| } |
| |
| /** |
| * Sets the {@link View} description. It briefly describes the view and is |
| * primarily used for accessibility support. Set this property to enable |
| * better accessibility support for your application. This is especially |
| * true for views that do not have textual representation (For example, |
| * ImageButton). |
| * |
| * @param contentDescription The content description. |
| * |
| * @attr ref android.R.styleable#View_contentDescription |
| */ |
| public void setContentDescription(CharSequence contentDescription) { |
| mContentDescription = contentDescription; |
| } |
| |
| /** |
| * Invoked whenever this view loses focus, either by losing window focus or by losing |
| * focus within its window. This method can be used to clear any state tied to the |
| * focus. For instance, if a button is held pressed with the trackball and the window |
| * loses focus, this method can be used to cancel the press. |
| * |
| * Subclasses of View overriding this method should always call super.onFocusLost(). |
| * |
| * @see #onFocusChanged(boolean, int, android.graphics.Rect) |
| * @see #onWindowFocusChanged(boolean) |
| * |
| * @hide pending API council approval |
| */ |
| protected void onFocusLost() { |
| resetPressedState(); |
| } |
| |
| private void resetPressedState() { |
| if ((mViewFlags & ENABLED_MASK) == DISABLED) { |
| return; |
| } |
| |
| if (isPressed()) { |
| setPressed(false); |
| |
| if (!mHasPerformedLongPress) { |
| removeLongPressCallback(); |
| } |
| } |
| } |
| |
| /** |
| * Returns true if this view has focus |
| * |
| * @return True if this view has focus, false otherwise. |
| */ |
| @ViewDebug.ExportedProperty(category = "focus") |
| public boolean isFocused() { |
| return (mPrivateFlags & FOCUSED) != 0; |
| } |
| |
| /** |
| * Find the view in the hierarchy rooted at this view that currently has |
| * focus. |
| * |
| * @return The view that currently has focus, or null if no focused view can |
| * be found. |
| */ |
| public View findFocus() { |
| return (mPrivateFlags & FOCUSED) != 0 ? this : null; |
| } |
| |
| /** |
| * Change whether this view is one of the set of scrollable containers in |
| * its window. This will be used to determine whether the window can |
| * resize or must pan when a soft input area is open -- scrollable |
| * containers allow the window to use resize mode since the container |
| * will appropriately shrink. |
| */ |
| public void setScrollContainer(boolean isScrollContainer) { |
| if (isScrollContainer) { |
| if (mAttachInfo != null && (mPrivateFlags&SCROLL_CONTAINER_ADDED) == 0) { |
| mAttachInfo.mScrollContainers.add(this); |
| mPrivateFlags |= SCROLL_CONTAINER_ADDED; |
| } |
| mPrivateFlags |= SCROLL_CONTAINER; |
| } else { |
| if ((mPrivateFlags&SCROLL_CONTAINER_ADDED) != 0) { |
| mAttachInfo.mScrollContainers.remove(this); |
| } |
| mPrivateFlags &= ~(SCROLL_CONTAINER|SCROLL_CONTAINER_ADDED); |
| } |
| } |
| |
| /** |
| * Returns the quality of the drawing cache. |
| * |
| * @return One of {@link #DRAWING_CACHE_QUALITY_AUTO}, |
| * {@link #DRAWING_CACHE_QUALITY_LOW}, or {@link #DRAWING_CACHE_QUALITY_HIGH} |
| * |
| * @see #setDrawingCacheQuality(int) |
| * @see #setDrawingCacheEnabled(boolean) |
| * @see #isDrawingCacheEnabled() |
| * |
| * @attr ref android.R.styleable#View_drawingCacheQuality |
| */ |
| public int getDrawingCacheQuality() { |
| return mViewFlags & DRAWING_CACHE_QUALITY_MASK; |
| } |
| |
| /** |
| * Set the drawing cache quality of this view. This value is used only when the |
| * drawing cache is enabled |
| * |
| * @param quality One of {@link #DRAWING_CACHE_QUALITY_AUTO}, |
| * {@link #DRAWING_CACHE_QUALITY_LOW}, or {@link #DRAWING_CACHE_QUALITY_HIGH} |
| * |
| * @see #getDrawingCacheQuality() |
| * @see #setDrawingCacheEnabled(boolean) |
| * @see #isDrawingCacheEnabled() |
| * |
| * @attr ref android.R.styleable#View_drawingCacheQuality |
| */ |
| public void setDrawingCacheQuality(int quality) { |
| setFlags(quality, DRAWING_CACHE_QUALITY_MASK); |
| } |
| |
| /** |
| * Returns whether the screen should remain on, corresponding to the current |
| * value of {@link #KEEP_SCREEN_ON}. |
| * |
| * @return Returns true if {@link #KEEP_SCREEN_ON} is set. |
| * |
| * @see #setKeepScreenOn(boolean) |
| * |
| * @attr ref android.R.styleable#View_keepScreenOn |
| */ |
| public boolean getKeepScreenOn() { |
| return (mViewFlags & KEEP_SCREEN_ON) != 0; |
| } |
| |
| /** |
| * Controls whether the screen should remain on, modifying the |
| * value of {@link #KEEP_SCREEN_ON}. |
| * |
| * @param keepScreenOn Supply true to set {@link #KEEP_SCREEN_ON}. |
| * |
| * @see #getKeepScreenOn() |
| * |
| * @attr ref android.R.styleable#View_keepScreenOn |
| */ |
| public void setKeepScreenOn(boolean keepScreenOn) { |
| setFlags(keepScreenOn ? KEEP_SCREEN_ON : 0, KEEP_SCREEN_ON); |
| } |
| |
| /** |
| * Gets the id of the view to use when the next focus is {@link #FOCUS_LEFT}. |
| * @return The next focus ID, or {@link #NO_ID} if the framework should decide automatically. |
| * |
| * @attr ref android.R.styleable#View_nextFocusLeft |
| */ |
| public int getNextFocusLeftId() { |
| return mNextFocusLeftId; |
| } |
| |
| /** |
| * Sets the id of the view to use when the next focus is {@link #FOCUS_LEFT}. |
| * @param nextFocusLeftId The next focus ID, or {@link #NO_ID} if the framework should |
| * decide automatically. |
| * |
| * @attr ref android.R.styleable#View_nextFocusLeft |
| */ |
| public void setNextFocusLeftId(int nextFocusLeftId) { |
| mNextFocusLeftId = nextFocusLeftId; |
| } |
| |
| /** |
| * Gets the id of the view to use when the next focus is {@link #FOCUS_RIGHT}. |
| * @return The next focus ID, or {@link #NO_ID} if the framework should decide automatically. |
| * |
| * @attr ref android.R.styleable#View_nextFocusRight |
| */ |
| public int getNextFocusRightId() { |
| return mNextFocusRightId; |
| } |
| |
| /** |
| * Sets the id of the view to use when the next focus is {@link #FOCUS_RIGHT}. |
| * @param nextFocusRightId The next focus ID, or {@link #NO_ID} if the framework should |
| * decide automatically. |
| * |
| * @attr ref android.R.styleable#View_nextFocusRight |
| */ |
| public void setNextFocusRightId(int nextFocusRightId) { |
| mNextFocusRightId = nextFocusRightId; |
| } |
| |
| /** |
| * Gets the id of the view to use when the next focus is {@link #FOCUS_UP}. |
| * @return The next focus ID, or {@link #NO_ID} if the framework should decide automatically. |
| * |
| * @attr ref android.R.styleable#View_nextFocusUp |
| */ |
| public int getNextFocusUpId() { |
| return mNextFocusUpId; |
| } |
| |
| /** |
| * Sets the id of the view to use when the next focus is {@link #FOCUS_UP}. |
| * @param nextFocusUpId The next focus ID, or {@link #NO_ID} if the framework should |
| * decide automatically. |
| * |
| * @attr ref android.R.styleable#View_nextFocusUp |
| */ |
| public void setNextFocusUpId(int nextFocusUpId) { |
| mNextFocusUpId = nextFocusUpId; |
| } |
| |
| /** |
| * Gets the id of the view to use when the next focus is {@link #FOCUS_DOWN}. |
| * @return The next focus ID, or {@link #NO_ID} if the framework should decide automatically. |
| * |
| * @attr ref android.R.styleable#View_nextFocusDown |
| */ |
| public int getNextFocusDownId() { |
| return mNextFocusDownId; |
| } |
| |
| /** |
| * Sets the id of the view to use when the next focus is {@link #FOCUS_DOWN}. |
| * @param nextFocusDownId The next focus ID, or {@link #NO_ID} if the framework should |
| * decide automatically. |
| * |
| * @attr ref android.R.styleable#View_nextFocusDown |
| */ |
| public void setNextFocusDownId(int nextFocusDownId) { |
| mNextFocusDownId = nextFocusDownId; |
| } |
| |
| /** |
| * Gets the id of the view to use when the next focus is {@link #FOCUS_FORWARD}. |
| * @return The next focus ID, or {@link #NO_ID} if the framework should decide automatically. |
| * |
| * @attr ref android.R.styleable#View_nextFocusForward |
| */ |
| public int getNextFocusForwardId() { |
| return mNextFocusForwardId; |
| } |
| |
| /** |
| * Sets the id of the view to use when the next focus is {@link #FOCUS_FORWARD}. |
| * @param nextFocusForwardId The next focus ID, or {@link #NO_ID} if the framework should |
| * decide automatically. |
| * |
| * @attr ref android.R.styleable#View_nextFocusForward |
| */ |
| public void setNextFocusForwardId(int nextFocusForwardId) { |
| mNextFocusForwardId = nextFocusForwardId; |
| } |
| |
| /** |
| * Returns the visibility of this view and all of its ancestors |
| * |
| * @return True if this view and all of its ancestors are {@link #VISIBLE} |
| */ |
| public boolean isShown() { |
| View current = this; |
| //noinspection ConstantConditions |
| do { |
| if ((current.mViewFlags & VISIBILITY_MASK) != VISIBLE) { |
| return false; |
| } |
| ViewParent parent = current.mParent; |
| if (parent == null) { |
| return false; // We are not attached to the view root |
| } |
| if (!(parent instanceof View)) { |
| return true; |
| } |
| current = (View) parent; |
| } while (current != null); |
| |
| return false; |
| } |
| |
| /** |
| * Apply the insets for system windows to this view, if the FITS_SYSTEM_WINDOWS flag |
| * is set |
| * |
| * @param insets Insets for system windows |
| * |
| * @return True if this view applied the insets, false otherwise |
| */ |
| protected boolean fitSystemWindows(Rect insets) { |
| if ((mViewFlags & FITS_SYSTEM_WINDOWS) == FITS_SYSTEM_WINDOWS) { |
| mPaddingLeft = insets.left; |
| mPaddingTop = insets.top; |
| mPaddingRight = insets.right; |
| mPaddingBottom = insets.bottom; |
| requestLayout(); |
| return true; |
| } |
| return false; |
| } |
| |
| /** |
| * Returns the visibility status for this view. |
| * |
| * @return One of {@link #VISIBLE}, {@link #INVISIBLE}, or {@link #GONE}. |
| * @attr ref android.R.styleable#View_visibility |
| */ |
| @ViewDebug.ExportedProperty(mapping = { |
| @ViewDebug.IntToString(from = VISIBLE, to = "VISIBLE"), |
| @ViewDebug.IntToString(from = INVISIBLE, to = "INVISIBLE"), |
| @ViewDebug.IntToString(from = GONE, to = "GONE") |
| }) |
| public int getVisibility() { |
| return mViewFlags & VISIBILITY_MASK; |
| } |
| |
| /** |
| * Set the enabled state of this view. |
| * |
| * @param visibility One of {@link #VISIBLE}, {@link #INVISIBLE}, or {@link #GONE}. |
| * @attr ref android.R.styleable#View_visibility |
| */ |
| @RemotableViewMethod |
| public void setVisibility(int visibility) { |
| setFlags(visibility, VISIBILITY_MASK); |
| if (mBGDrawable != null) mBGDrawable.setVisible(visibility == VISIBLE, false); |
| } |
| |
| /** |
| * Returns the enabled status for this view. The interpretation of the |
| * enabled state varies by subclass. |
| * |
| * @return True if this view is enabled, false otherwise. |
| */ |
| @ViewDebug.ExportedProperty |
| public boolean isEnabled() { |
| return (mViewFlags & ENABLED_MASK) == ENABLED; |
| } |
| |
| /** |
| * Set the enabled state of this view. The interpretation of the enabled |
| * state varies by subclass. |
| * |
| * @param enabled True if this view is enabled, false otherwise. |
| */ |
| @RemotableViewMethod |
| public void setEnabled(boolean enabled) { |
| if (enabled == isEnabled()) return; |
| |
| setFlags(enabled ? ENABLED : DISABLED, ENABLED_MASK); |
| |
| /* |
| * The View most likely has to change its appearance, so refresh |
| * the drawable state. |
| */ |
| refreshDrawableState(); |
| |
| // Invalidate too, since the default behavior for views is to be |
| // be drawn at 50% alpha rather than to change the drawable. |
| invalidate(true); |
| } |
| |
| /** |
| * Set whether this view can receive the focus. |
| * |
| * Setting this to false will also ensure that this view is not focusable |
| * in touch mode. |
| * |
| * @param focusable If true, this view can receive the focus. |
| * |
| * @see #setFocusableInTouchMode(boolean) |
| * @attr ref android.R.styleable#View_focusable |
| */ |
| public void setFocusable(boolean focusable) { |
| if (!focusable) { |
| setFlags(0, FOCUSABLE_IN_TOUCH_MODE); |
| } |
| setFlags(focusable ? FOCUSABLE : NOT_FOCUSABLE, FOCUSABLE_MASK); |
| } |
| |
| /** |
| * Set whether this view can receive focus while in touch mode. |
| * |
| * Setting this to true will also ensure that this view is focusable. |
| * |
| * @param focusableInTouchMode If true, this view can receive the focus while |
| * in touch mode. |
| * |
| * @see #setFocusable(boolean) |
| * @attr ref android.R.styleable#View_focusableInTouchMode |
| */ |
| public void setFocusableInTouchMode(boolean focusableInTouchMode) { |
| // Focusable in touch mode should always be set before the focusable flag |
| // otherwise, setting the focusable flag will trigger a focusableViewAvailable() |
| // which, in touch mode, will not successfully request focus on this view |
| // because the focusable in touch mode flag is not set |
| setFlags(focusableInTouchMode ? FOCUSABLE_IN_TOUCH_MODE : 0, FOCUSABLE_IN_TOUCH_MODE); |
| if (focusableInTouchMode) { |
| setFlags(FOCUSABLE, FOCUSABLE_MASK); |
| } |
| } |
| |
| /** |
| * Set whether this view should have sound effects enabled for events such as |
| * clicking and touching. |
| * |
| * <p>You may wish to disable sound effects for a view if you already play sounds, |
| * for instance, a dial key that plays dtmf tones. |
| * |
| * @param soundEffectsEnabled whether sound effects are enabled for this view. |
| * @see #isSoundEffectsEnabled() |
| * @see #playSoundEffect(int) |
| * @attr ref android.R.styleable#View_soundEffectsEnabled |
| */ |
| public void setSoundEffectsEnabled(boolean soundEffectsEnabled) { |
| setFlags(soundEffectsEnabled ? SOUND_EFFECTS_ENABLED: 0, SOUND_EFFECTS_ENABLED); |
| } |
| |
| /** |
| * @return whether this view should have sound effects enabled for events such as |
| * clicking and touching. |
| * |
| * @see #setSoundEffectsEnabled(boolean) |
| * @see #playSoundEffect(int) |
| * @attr ref android.R.styleable#View_soundEffectsEnabled |
| */ |
| @ViewDebug.ExportedProperty |
| public boolean isSoundEffectsEnabled() { |
| return SOUND_EFFECTS_ENABLED == (mViewFlags & SOUND_EFFECTS_ENABLED); |
| } |
| |
| /** |
| * Set whether this view should have haptic feedback for events such as |
| * long presses. |
| * |
| * <p>You may wish to disable haptic feedback if your view already controls |
| * its own haptic feedback. |
| * |
| * @param hapticFeedbackEnabled whether haptic feedback enabled for this view. |
| * @see #isHapticFeedbackEnabled() |
| * @see #performHapticFeedback(int) |
| * @attr ref android.R.styleable#View_hapticFeedbackEnabled |
| */ |
| public void setHapticFeedbackEnabled(boolean hapticFeedbackEnabled) { |
| setFlags(hapticFeedbackEnabled ? HAPTIC_FEEDBACK_ENABLED: 0, HAPTIC_FEEDBACK_ENABLED); |
| } |
| |
| /** |
| * @return whether this view should have haptic feedback enabled for events |
| * long presses. |
| * |
| * @see #setHapticFeedbackEnabled(boolean) |
| * @see #performHapticFeedback(int) |
| * @attr ref android.R.styleable#View_hapticFeedbackEnabled |
| */ |
| @ViewDebug.ExportedProperty |
| public boolean isHapticFeedbackEnabled() { |
| return HAPTIC_FEEDBACK_ENABLED == (mViewFlags & HAPTIC_FEEDBACK_ENABLED); |
| } |
| |
| /** |
| * Returns the layout direction for this view. |
| * |
| * @return One of {@link #LAYOUT_DIRECTION_LTR}, |
| * {@link #LAYOUT_DIRECTION_RTL}, |
| * {@link #LAYOUT_DIRECTION_INHERIT} or |
| * {@link #LAYOUT_DIRECTION_LOCALE}. |
| * @attr ref android.R.styleable#View_layoutDirection |
| * |
| * @hide |
| */ |
| @ViewDebug.ExportedProperty(category = "layout", mapping = { |
| @ViewDebug.IntToString(from = LAYOUT_DIRECTION_LTR, to = "LTR"), |
| @ViewDebug.IntToString(from = LAYOUT_DIRECTION_RTL, to = "RTL"), |
| @ViewDebug.IntToString(from = LAYOUT_DIRECTION_INHERIT, to = "INHERIT"), |
| @ViewDebug.IntToString(from = LAYOUT_DIRECTION_LOCALE, to = "LOCALE") |
| }) |
| public int getLayoutDirection() { |
| return mViewFlags & LAYOUT_DIRECTION_MASK; |
| } |
| |
| /** |
| * Set the layout direction for this view. This will propagate a reset of layout direction |
| * resolution to the view's children and resolve layout direction for this view. |
| * |
| * @param layoutDirection One of {@link #LAYOUT_DIRECTION_LTR}, |
| * {@link #LAYOUT_DIRECTION_RTL}, |
| * {@link #LAYOUT_DIRECTION_INHERIT} or |
| * {@link #LAYOUT_DIRECTION_LOCALE}. |
| * |
| * @attr ref android.R.styleable#View_layoutDirection |
| * |
| * @hide |
| */ |
| @RemotableViewMethod |
| public void setLayoutDirection(int layoutDirection) { |
| if (getLayoutDirection() != layoutDirection) { |
| resetResolvedLayoutDirection(); |
| // Setting the flag will also request a layout. |
| setFlags(layoutDirection, LAYOUT_DIRECTION_MASK); |
| } |
| } |
| |
| /** |
| * Returns the resolved layout direction for this view. |
| * |
| * @return {@link #LAYOUT_DIRECTION_RTL} if the layout direction is RTL or returns |
| * {@link #LAYOUT_DIRECTION_LTR} id the layout direction is not RTL. |
| * |
| * @hide |
| */ |
| @ViewDebug.ExportedProperty(category = "layout", mapping = { |
| @ViewDebug.IntToString(from = LAYOUT_DIRECTION_LTR, to = "RESOLVED_DIRECTION_LTR"), |
| @ViewDebug.IntToString(from = LAYOUT_DIRECTION_RTL, to = "RESOLVED_DIRECTION_RTL") |
| }) |
| public int getResolvedLayoutDirection() { |
| resolveLayoutDirectionIfNeeded(); |
| return ((mPrivateFlags2 & LAYOUT_DIRECTION_RESOLVED_RTL) == LAYOUT_DIRECTION_RESOLVED_RTL) ? |
| LAYOUT_DIRECTION_RTL : LAYOUT_DIRECTION_LTR; |
| } |
| |
| /** |
| * <p>Indicates whether or not this view's layout is right-to-left. This is resolved from |
| * layout attribute and/or the inherited value from the parent.</p> |
| * |
| * @return true if the layout is right-to-left. |
| * |
| * @hide |
| */ |
| @ViewDebug.ExportedProperty(category = "layout") |
| public boolean isLayoutRtl() { |
| return (getResolvedLayoutDirection() == LAYOUT_DIRECTION_RTL); |
| } |
| |
| /** |
| * If this view doesn't do any drawing on its own, set this flag to |
| * allow further optimizations. By default, this flag is not set on |
| * View, but could be set on some View subclasses such as ViewGroup. |
| * |
| * Typically, if you override {@link #onDraw(android.graphics.Canvas)} |
| * you should clear this flag. |
| * |
| * @param willNotDraw whether or not this View draw on its own |
| */ |
| public void setWillNotDraw(boolean willNotDraw) { |
| setFlags(willNotDraw ? WILL_NOT_DRAW : 0, DRAW_MASK); |
| } |
| |
| /** |
| * Returns whether or not this View draws on its own. |
| * |
| * @return true if this view has nothing to draw, false otherwise |
| */ |
| @ViewDebug.ExportedProperty(category = "drawing") |
| public boolean willNotDraw() { |
| return (mViewFlags & DRAW_MASK) == WILL_NOT_DRAW; |
| } |
| |
| /** |
| * When a View's drawing cache is enabled, drawing is redirected to an |
| * offscreen bitmap. Some views, like an ImageView, must be able to |
| * bypass this mechanism if they already draw a single bitmap, to avoid |
| * unnecessary usage of the memory. |
| * |
| * @param willNotCacheDrawing true if this view does not cache its |
| * drawing, false otherwise |
| */ |
| public void setWillNotCacheDrawing(boolean willNotCacheDrawing) { |
| setFlags(willNotCacheDrawing ? WILL_NOT_CACHE_DRAWING : 0, WILL_NOT_CACHE_DRAWING); |
| } |
| |
| /** |
| * Returns whether or not this View can cache its drawing or not. |
| * |
| * @return true if this view does not cache its drawing, false otherwise |
| */ |
| @ViewDebug.ExportedProperty(category = "drawing") |
| public boolean willNotCacheDrawing() { |
| return (mViewFlags & WILL_NOT_CACHE_DRAWING) == WILL_NOT_CACHE_DRAWING; |
| } |
| |
| /** |
| * Indicates whether this view reacts to click events or not. |
| * |
| * @return true if the view is clickable, false otherwise |
| * |
| * @see #setClickable(boolean) |
| * @attr ref android.R.styleable#View_clickable |
| */ |
| @ViewDebug.ExportedProperty |
| public boolean isClickable() { |
| return (mViewFlags & CLICKABLE) == CLICKABLE; |
| } |
| |
| /** |
| * Enables or disables click events for this view. When a view |
| * is clickable it will change its state to "pressed" on every click. |
| * Subclasses should set the view clickable to visually react to |
| * user's clicks. |
| * |
| * @param clickable true to make the view clickable, false otherwise |
| * |
| * @see #isClickable() |
| * @attr ref android.R.styleable#View_clickable |
| */ |
| public void setClickable(boolean clickable) { |
| setFlags(clickable ? CLICKABLE : 0, CLICKABLE); |
| } |
| |
| /** |
| * Indicates whether this view reacts to long click events or not. |
| * |
| * @return true if the view is long clickable, false otherwise |
| * |
| * @see #setLongClickable(boolean) |
| * @attr ref android.R.styleable#View_longClickable |
| */ |
| public boolean isLongClickable() { |
| return (mViewFlags & LONG_CLICKABLE) == LONG_CLICKABLE; |
| } |
| |
| /** |
| * Enables or disables long click events for this view. When a view is long |
| * clickable it reacts to the user holding down the button for a longer |
| * duration than a tap. This event can either launch the listener or a |
| * context menu. |
| * |
| * @param longClickable true to make the view long clickable, false otherwise |
| * @see #isLongClickable() |
| * @attr ref android.R.styleable#View_longClickable |
| */ |
| public void setLongClickable(boolean longClickable) { |
| setFlags(longClickable ? LONG_CLICKABLE : 0, LONG_CLICKABLE); |
| } |
| |
| /** |
| * Sets the pressed state for this view. |
| * |
| * @see #isClickable() |
| * @see #setClickable(boolean) |
| * |
| * @param pressed Pass true to set the View's internal state to "pressed", or false to reverts |
| * the View's internal state from a previously set "pressed" state. |
| */ |
| public void setPressed(boolean pressed) { |
| if (pressed) { |
| mPrivateFlags |= PRESSED; |
| } else { |
| mPrivateFlags &= ~PRESSED; |
| } |
| refreshDrawableState(); |
| dispatchSetPressed(pressed); |
| } |
| |
| /** |
| * Dispatch setPressed to all of this View's children. |
| * |
| * @see #setPressed(boolean) |
| * |
| * @param pressed The new pressed state |
| */ |
| protected void dispatchSetPressed(boolean pressed) { |
| } |
| |
| /** |
| * Indicates whether the view is currently in pressed state. Unless |
| * {@link #setPressed(boolean)} is explicitly called, only clickable views can enter |
| * the pressed state. |
| * |
| * @see #setPressed(boolean) |
| * @see #isClickable() |
| * @see #setClickable(boolean) |
| * |
| * @return true if the view is currently pressed, false otherwise |
| */ |
| public boolean isPressed() { |
| return (mPrivateFlags & PRESSED) == PRESSED; |
| } |
| |
| /** |
| * Indicates whether this view will save its state (that is, |
| * whether its {@link #onSaveInstanceState} method will be called). |
| * |
| * @return Returns true if the view state saving is enabled, else false. |
| * |
| * @see #setSaveEnabled(boolean) |
| * @attr ref android.R.styleable#View_saveEnabled |
| */ |
| public boolean isSaveEnabled() { |
| return (mViewFlags & SAVE_DISABLED_MASK) != SAVE_DISABLED; |
| } |
| |
| /** |
| * Controls whether the saving of this view's state is |
| * enabled (that is, whether its {@link #onSaveInstanceState} method |
| * will be called). Note that even if freezing is enabled, the |
| * view still must have an id assigned to it (via {@link #setId(int)}) |
| * for its state to be saved. This flag can only disable the |
| * saving of this view; any child views may still have their state saved. |
| * |
| * @param enabled Set to false to <em>disable</em> state saving, or true |
| * (the default) to allow it. |
| * |
| * @see #isSaveEnabled() |
| * @see #setId(int) |
| * @see #onSaveInstanceState() |
| * @attr ref android.R.styleable#View_saveEnabled |
| */ |
| public void setSaveEnabled(boolean enabled) { |
| setFlags(enabled ? 0 : SAVE_DISABLED, SAVE_DISABLED_MASK); |
| } |
| |
| /** |
| * Gets whether the framework should discard touches when the view's |
| * window is obscured by another visible window. |
| * Refer to the {@link View} security documentation for more details. |
| * |
| * @return True if touch filtering is enabled. |
| * |
| * @see #setFilterTouchesWhenObscured(boolean) |
| * @attr ref android.R.styleable#View_filterTouchesWhenObscured |
| */ |
| @ViewDebug.ExportedProperty |
| public boolean getFilterTouchesWhenObscured() { |
| return (mViewFlags & FILTER_TOUCHES_WHEN_OBSCURED) != 0; |
| } |
| |
| /** |
| * Sets whether the framework should discard touches when the view's |
| * window is obscured by another visible window. |
| * Refer to the {@link View} security documentation for more details. |
| * |
| * @param enabled True if touch filtering should be enabled. |
| * |
| * @see #getFilterTouchesWhenObscured |
| * @attr ref android.R.styleable#View_filterTouchesWhenObscured |
| */ |
| public void setFilterTouchesWhenObscured(boolean enabled) { |
| setFlags(enabled ? 0 : FILTER_TOUCHES_WHEN_OBSCURED, |
| FILTER_TOUCHES_WHEN_OBSCURED); |
| } |
| |
| /** |
| * Indicates whether the entire hierarchy under this view will save its |
| * state when a state saving traversal occurs from its parent. The default |
| * is true; if false, these views will not be saved unless |
| * {@link #saveHierarchyState(SparseArray)} is called directly on this view. |
| * |
| * @return Returns true if the view state saving from parent is enabled, else false. |
| * |
| * @see #setSaveFromParentEnabled(boolean) |
| */ |
| public boolean isSaveFromParentEnabled() { |
| return (mViewFlags & PARENT_SAVE_DISABLED_MASK) != PARENT_SAVE_DISABLED; |
| } |
| |
| /** |
| * Controls whether the entire hierarchy under this view will save its |
| * state when a state saving traversal occurs from its parent. The default |
| * is true; if false, these views will not be saved unless |
| * {@link #saveHierarchyState(SparseArray)} is called directly on this view. |
| * |
| * @param enabled Set to false to <em>disable</em> state saving, or true |
| * (the default) to allow it. |
| * |
| * @see #isSaveFromParentEnabled() |
| * @see #setId(int) |
| * @see #onSaveInstanceState() |
| */ |
| public void setSaveFromParentEnabled(boolean enabled) { |
| setFlags(enabled ? 0 : PARENT_SAVE_DISABLED, PARENT_SAVE_DISABLED_MASK); |
| } |
| |
| |
| /** |
| * Returns whether this View is able to take focus. |
| * |
| * @return True if this view can take focus, or false otherwise. |
| * @attr ref android.R.styleable#View_focusable |
| */ |
| @ViewDebug.ExportedProperty(category = "focus") |
| public final boolean isFocusable() { |
| return FOCUSABLE == (mViewFlags & FOCUSABLE_MASK); |
| } |
| |
| /** |
| * When a view is focusable, it may not want to take focus when in touch mode. |
| * For example, a button would like focus when the user is navigating via a D-pad |
| * so that the user can click on it, but once the user starts touching the screen, |
| * the button shouldn't take focus |
| * @return Whether the view is focusable in touch mode. |
| * @attr ref android.R.styleable#View_focusableInTouchMode |
| */ |
| @ViewDebug.ExportedProperty |
| public final boolean isFocusableInTouchMode() { |
| return FOCUSABLE_IN_TOUCH_MODE == (mViewFlags & FOCUSABLE_IN_TOUCH_MODE); |
| } |
| |
| /** |
| * Find the nearest view in the specified direction that can take focus. |
| * This does not actually give focus to that view. |
| * |
| * @param direction One of FOCUS_UP, FOCUS_DOWN, FOCUS_LEFT, and FOCUS_RIGHT |
| * |
| * @return The nearest focusable in the specified direction, or null if none |
| * can be found. |
| */ |
| public View focusSearch(int direction) { |
| if (mParent != null) { |
| return mParent.focusSearch(this, direction); |
| } else { |
| return null; |
| } |
| } |
| |
| /** |
| * This method is the last chance for the focused view and its ancestors to |
| * respond to an arrow key. This is called when the focused view did not |
| * consume the key internally, nor could the view system find a new view in |
| * the requested direction to give focus to. |
| * |
| * @param focused The currently focused view. |
| * @param direction The direction focus wants to move. One of FOCUS_UP, |
| * FOCUS_DOWN, FOCUS_LEFT, and FOCUS_RIGHT. |
| * @return True if the this view consumed this unhandled move. |
| */ |
| public boolean dispatchUnhandledMove(View focused, int direction) { |
| return false; |
| } |
| |
| /** |
| * If a user manually specified the next view id for a particular direction, |
| * use the root to look up the view. |
| * @param root The root view of the hierarchy containing this view. |
| * @param direction One of FOCUS_UP, FOCUS_DOWN, FOCUS_LEFT, FOCUS_RIGHT, FOCUS_FORWARD, |
| * or FOCUS_BACKWARD. |
| * @return The user specified next view, or null if there is none. |
| */ |
| View findUserSetNextFocus(View root, int direction) { |
| switch (direction) { |
| case FOCUS_LEFT: |
| if (mNextFocusLeftId == View.NO_ID) return null; |
| return findViewShouldExist(root, mNextFocusLeftId); |
| case FOCUS_RIGHT: |
| if (mNextFocusRightId == View.NO_ID) return null; |
| return findViewShouldExist(root, mNextFocusRightId); |
| case FOCUS_UP: |
| if (mNextFocusUpId == View.NO_ID) return null; |
| return findViewShouldExist(root, mNextFocusUpId); |
| case FOCUS_DOWN: |
| if (mNextFocusDownId == View.NO_ID) return null; |
| return findViewShouldExist(root, mNextFocusDownId); |
| case FOCUS_FORWARD: |
| if (mNextFocusForwardId == View.NO_ID) return null; |
| return findViewShouldExist(root, mNextFocusForwardId); |
| case FOCUS_BACKWARD: { |
| final int id = mID; |
| return root.findViewByPredicate(new Predicate<View>() { |
| @Override |
| public boolean apply(View t) { |
| return t.mNextFocusForwardId == id; |
| } |
| }); |
| } |
| } |
| return null; |
| } |
| |
| private static View findViewShouldExist(View root, int childViewId) { |
| View result = root.findViewById(childViewId); |
| if (result == null) { |
| Log.w(VIEW_LOG_TAG, "couldn't find next focus view specified " |
| + "by user for id " + childViewId); |
| } |
| return result; |
| } |
| |
| /** |
| * Find and return all focusable views that are descendants of this view, |
| * possibly including this view if it is focusable itself. |
| * |
| * @param direction The direction of the focus |
| * @return A list of focusable views |
| */ |
| public ArrayList<View> getFocusables(int direction) { |
| ArrayList<View> result = new ArrayList<View>(24); |
| addFocusables(result, direction); |
| return result; |
| } |
| |
| /** |
| * Add any focusable views that are descendants of this view (possibly |
| * including this view if it is focusable itself) to views. If we are in touch mode, |
| * only add views that are also focusable in touch mode. |
| * |
| * @param views Focusable views found so far |
| * @param direction The direction of the focus |
| */ |
| public void addFocusables(ArrayList<View> views, int direction) { |
| addFocusables(views, direction, FOCUSABLES_TOUCH_MODE); |
| } |
| |
| /** |
| * Adds any focusable views that are descendants of this view (possibly |
| * including this view if it is focusable itself) to views. This method |
| * adds all focusable views regardless if we are in touch mode or |
| * only views focusable in touch mode if we are in touch mode depending on |
| * the focusable mode paramater. |
| * |
| * @param views Focusable views found so far or null if all we are interested is |
| * the number of focusables. |
| * @param direction The direction of the focus. |
| * @param focusableMode The type of focusables to be added. |
| * |
| * @see #FOCUSABLES_ALL |
| * @see #FOCUSABLES_TOUCH_MODE |
| */ |
| public void addFocusables(ArrayList<View> views, int direction, int focusableMode) { |
| if (!isFocusable()) { |
| return; |
| } |
| |
| if ((focusableMode & FOCUSABLES_TOUCH_MODE) == FOCUSABLES_TOUCH_MODE && |
| isInTouchMode() && !isFocusableInTouchMode()) { |
| return; |
| } |
| |
| if (views != null) { |
| views.add(this); |
| } |
| } |
| |
| /** |
| * Finds the Views that contain given text. The containment is case insensitive. |
| * As View's text is considered any text content that View renders. |
| * |
| * @param outViews The output list of matching Views. |
| * @param text The text to match against. |
| */ |
| public void findViewsWithText(ArrayList<View> outViews, CharSequence text) { |
| } |
| |
| /** |
| * Find and return all touchable views that are descendants of this view, |
| * possibly including this view if it is touchable itself. |
| * |
| * @return A list of touchable views |
| */ |
| public ArrayList<View> getTouchables() { |
| ArrayList<View> result = new ArrayList<View>(); |
| addTouchables(result); |
| return result; |
| } |
| |
| /** |
| * Add any touchable views that are descendants of this view (possibly |
| * including this view if it is touchable itself) to views. |
| * |
| * @param views Touchable views found so far |
| */ |
| public void addTouchables(ArrayList<View> views) { |
| final int viewFlags = mViewFlags; |
| |
| if (((viewFlags & CLICKABLE) == CLICKABLE || (viewFlags & LONG_CLICKABLE) == LONG_CLICKABLE) |
| && (viewFlags & ENABLED_MASK) == ENABLED) { |
| views.add(this); |
| } |
| } |
| |
| /** |
| * Call this to try to give focus to a specific view or to one of its |
| * descendants. |
| * |
| * A view will not actually take focus if it is not focusable ({@link #isFocusable} returns |
| * false), or if it is focusable and it is not focusable in touch mode |
| * ({@link #isFocusableInTouchMode}) while the device is in touch mode. |
| * |
| * See also {@link #focusSearch(int)}, which is what you call to say that you |
| * have focus, and you want your parent to look for the next one. |
| * |
| * This is equivalent to calling {@link #requestFocus(int, Rect)} with arguments |
| * {@link #FOCUS_DOWN} and <code>null</code>. |
| * |
| * @return Whether this view or one of its descendants actually took focus. |
| */ |
| public final boolean requestFocus() { |
| return requestFocus(View.FOCUS_DOWN); |
| } |
| |
| |
| /** |
| * Call this to try to give focus to a specific view or to one of its |
| * descendants and give it a hint about what direction focus is heading. |
| * |
| * A view will not actually take focus if it is not focusable ({@link #isFocusable} returns |
| * false), or if it is focusable and it is not focusable in touch mode |
| * ({@link #isFocusableInTouchMode}) while the device is in touch mode. |
| * |
| * See also {@link #focusSearch(int)}, which is what you call to say that you |
| * have focus, and you want your parent to look for the next one. |
| * |
| * This is equivalent to calling {@link #requestFocus(int, Rect)} with |
| * <code>null</code> set for the previously focused rectangle. |
| * |
| * @param direction One of FOCUS_UP, FOCUS_DOWN, FOCUS_LEFT, and FOCUS_RIGHT |
| * @return Whether this view or one of its descendants actually took focus. |
| */ |
| public final boolean requestFocus(int direction) { |
| return requestFocus(direction, null); |
| } |
| |
| /** |
| * Call this to try to give focus to a specific view or to one of its descendants |
| * and give it hints about the direction and a specific rectangle that the focus |
| * is coming from. The rectangle can help give larger views a finer grained hint |
| * about where focus is coming from, and therefore, where to show selection, or |
| * forward focus change internally. |
| * |
| * A view will not actually take focus if it is not focusable ({@link #isFocusable} returns |
| * false), or if it is focusable and it is not focusable in touch mode |
| * ({@link #isFocusableInTouchMode}) while the device is in touch mode. |
| * |
| * A View will not take focus if it is not visible. |
| * |
| * A View will not take focus if one of its parents has |
| * {@link android.view.ViewGroup#getDescendantFocusability()} equal to |
| * {@link ViewGroup#FOCUS_BLOCK_DESCENDANTS}. |
| * |
| * See also {@link #focusSearch(int)}, which is what you call to say that you |
| * have focus, and you want your parent to look for the next one. |
| * |
| * You may wish to override this method if your custom {@link View} has an internal |
| * {@link View} that it wishes to forward the request to. |
| * |
| * @param direction One of FOCUS_UP, FOCUS_DOWN, FOCUS_LEFT, and FOCUS_RIGHT |
| * @param previouslyFocusedRect The rectangle (in this View's coordinate system) |
| * to give a finer grained hint about where focus is coming from. May be null |
| * if there is no hint. |
| * @return Whether this view or one of its descendants actually took focus. |
| */ |
| public boolean requestFocus(int direction, Rect previouslyFocusedRect) { |
| // need to be focusable |
| if ((mViewFlags & FOCUSABLE_MASK) != FOCUSABLE || |
| (mViewFlags & VISIBILITY_MASK) != VISIBLE) { |
| return false; |
| } |
| |
| // need to be focusable in touch mode if in touch mode |
| if (isInTouchMode() && |
| (FOCUSABLE_IN_TOUCH_MODE != (mViewFlags & FOCUSABLE_IN_TOUCH_MODE))) { |
| return false; |
| } |
| |
| // need to not have any parents blocking us |
| if (hasAncestorThatBlocksDescendantFocus()) { |
| return false; |
| } |
| |
| handleFocusGainInternal(direction, previouslyFocusedRect); |
| return true; |
| } |
| |
| /** Gets the ViewAncestor, or null if not attached. */ |
| /*package*/ ViewAncestor getViewAncestor() { |
| View root = getRootView(); |
| return root != null ? (ViewAncestor)root.getParent() : null; |
| } |
| |
| /** |
| * Call this to try to give focus to a specific view or to one of its descendants. This is a |
| * special variant of {@link #requestFocus() } that will allow views that are not focuable in |
| * touch mode to request focus when they are touched. |
| * |
| * @return Whether this view or one of its descendants actually took focus. |
| * |
| * @see #isInTouchMode() |
| * |
| */ |
| public final boolean requestFocusFromTouch() { |
| // Leave touch mode if we need to |
| if (isInTouchMode()) { |
| ViewAncestor viewRoot = getViewAncestor(); |
| if (viewRoot != null) { |
| viewRoot.ensureTouchMode(false); |
| } |
| } |
| return requestFocus(View.FOCUS_DOWN); |
| } |
| |
| /** |
| * @return Whether any ancestor of this view blocks descendant focus. |
| */ |
| private boolean hasAncestorThatBlocksDescendantFocus() { |
| ViewParent ancestor = mParent; |
| while (ancestor instanceof ViewGroup) { |
| final ViewGroup vgAncestor = (ViewGroup) ancestor; |
| if (vgAncestor.getDescendantFocusability() == ViewGroup.FOCUS_BLOCK_DESCENDANTS) { |
| return true; |
| } else { |
| ancestor = vgAncestor.getParent(); |
| } |
| } |
| return false; |
| } |
| |
| /** |
| * @hide |
| */ |
| public void dispatchStartTemporaryDetach() { |
| onStartTemporaryDetach(); |
| } |
| |
| /** |
| * This is called when a container is going to temporarily detach a child, with |
| * {@link ViewGroup#detachViewFromParent(View) ViewGroup.detachViewFromParent}. |
| * It will either be followed by {@link #onFinishTemporaryDetach()} or |
| * {@link #onDetachedFromWindow()} when the container is done. |
| */ |
| public void onStartTemporaryDetach() { |
| removeUnsetPressCallback(); |
| mPrivateFlags |= CANCEL_NEXT_UP_EVENT; |
| } |
| |
| /** |
| * @hide |
| */ |
| public void dispatchFinishTemporaryDetach() { |
| onFinishTemporaryDetach(); |
| } |
| |
| /** |
| * Called after {@link #onStartTemporaryDetach} when the container is done |
| * changing the view. |
| */ |
| public void onFinishTemporaryDetach() { |
| } |
| |
| /** |
| * Return the global {@link KeyEvent.DispatcherState KeyEvent.DispatcherState} |
| * for this view's window. Returns null if the view is not currently attached |
| * to the window. Normally you will not need to use this directly, but |
| * just use the standard high-level event callbacks like |
| * {@link #onKeyDown(int, KeyEvent)}. |
| */ |
| public KeyEvent.DispatcherState getKeyDispatcherState() { |
| return mAttachInfo != null ? mAttachInfo.mKeyDispatchState : null; |
| } |
| |
| /** |
| * Dispatch a key event before it is processed by any input method |
| * associated with the view hierarchy. This can be used to intercept |
| * key events in special situations before the IME consumes them; a |
| * typical example would be handling the BACK key to update the application's |
| * UI instead of allowing the IME to see it and close itself. |
| * |
| * @param event The key event to be dispatched. |
| * @return True if the event was handled, false otherwise. |
| */ |
| public boolean dispatchKeyEventPreIme(KeyEvent event) { |
| return onKeyPreIme(event.getKeyCode(), event); |
| } |
| |
| /** |
| * Dispatch a key event to the next view on the focus path. This path runs |
| * from the top of the view tree down to the currently focused view. If this |
| * view has focus, it will dispatch to itself. Otherwise it will dispatch |
| * the next node down the focus path. This method also fires any key |
| * listeners. |
| * |
| * @param event The key event to be dispatched. |
| * @return True if the event was handled, false otherwise. |
| */ |
| public boolean dispatchKeyEvent(KeyEvent event) { |
| if (mInputEventConsistencyVerifier != null) { |
| mInputEventConsistencyVerifier.onKeyEvent(event, 0); |
| } |
| |
| // Give any attached key listener a first crack at the event. |
| //noinspection SimplifiableIfStatement |
| if (mOnKeyListener != null && (mViewFlags & ENABLED_MASK) == ENABLED |
| && mOnKeyListener.onKey(this, event.getKeyCode(), event)) { |
| return true; |
| } |
| |
| if (event.dispatch(this, mAttachInfo != null |
| ? mAttachInfo.mKeyDispatchState : null, this)) { |
| return true; |
| } |
| |
| if (mInputEventConsistencyVerifier != null) { |
| mInputEventConsistencyVerifier.onUnhandledEvent(event, 0); |
| } |
| return false; |
| } |
| |
| /** |
| * Dispatches a key shortcut event. |
| * |
| * @param event The key event to be dispatched. |
| * @return True if the event was handled by the view, false otherwise. |
| */ |
| public boolean dispatchKeyShortcutEvent(KeyEvent event) { |
| return onKeyShortcut(event.getKeyCode(), event); |
| } |
| |
| /** |
| * Pass the touch screen motion event down to the target view, or this |
| * view if it is the target. |
| * |
| * @param event The motion event to be dispatched. |
| * @return True if the event was handled by the view, false otherwise. |
| */ |
| public boolean dispatchTouchEvent(MotionEvent event) { |
| if (mInputEventConsistencyVerifier != null) { |
| mInputEventConsistencyVerifier.onTouchEvent(event, 0); |
| } |
| |
| if (onFilterTouchEventForSecurity(event)) { |
| //noinspection SimplifiableIfStatement |
| if (mOnTouchListener != null && (mViewFlags & ENABLED_MASK) == ENABLED && |
| mOnTouchListener.onTouch(this, event)) { |
| return true; |
| } |
| |
| if (onTouchEvent(event)) { |
| return true; |
| } |
| } |
| |
| if (mInputEventConsistencyVerifier != null) { |
| mInputEventConsistencyVerifier.onUnhandledEvent(event, 0); |
| } |
| return false; |
| } |
| |
| /** |
| * Filter the touch event to apply security policies. |
| * |
| * @param event The motion event to be filtered. |
| * @return True if the event should be dispatched, false if the event should be dropped. |
| * |
| * @see #getFilterTouchesWhenObscured |
| */ |
| public boolean onFilterTouchEventForSecurity(MotionEvent event) { |
| //noinspection RedundantIfStatement |
| if ((mViewFlags & FILTER_TOUCHES_WHEN_OBSCURED) != 0 |
| && (event.getFlags() & MotionEvent.FLAG_WINDOW_IS_OBSCURED) != 0) { |
| // Window is obscured, drop this touch. |
| return false; |
| } |
| return true; |
| } |
| |
| /** |
| * Pass a trackball motion event down to the focused view. |
| * |
| * @param event The motion event to be dispatched. |
| * @return True if the event was handled by the view, false otherwise. |
| */ |
| public boolean dispatchTrackballEvent(MotionEvent event) { |
| if (mInputEventConsistencyVerifier != null) { |
| mInputEventConsistencyVerifier.onTrackballEvent(event, 0); |
| } |
| |
| return onTrackballEvent(event); |
| } |
| |
| /** |
| * Dispatch a generic motion event. |
| * <p> |
| * Generic motion events with source class {@link InputDevice#SOURCE_CLASS_POINTER} |
| * are delivered to the view under the pointer. All other generic motion events are |
| * delivered to the focused view. Hover events are handled specially and are delivered |
| * to {@link #onHoverEvent(MotionEvent)}. |
| * </p> |
| * |
| * @param event The motion event to be dispatched. |
| * @return True if the event was handled by the view, false otherwise. |
| */ |
| public boolean dispatchGenericMotionEvent(MotionEvent event) { |
| if (mInputEventConsistencyVerifier != null) { |
| mInputEventConsistencyVerifier.onGenericMotionEvent(event, 0); |
| } |
| |
| final int source = event.getSource(); |
| if ((source & InputDevice.SOURCE_CLASS_POINTER) != 0) { |
| final int action = event.getAction(); |
| if (action == MotionEvent.ACTION_HOVER_ENTER |
| || action == MotionEvent.ACTION_HOVER_MOVE |
| || action == MotionEvent.ACTION_HOVER_EXIT) { |
| if (dispatchHoverEvent(event)) { |
| // For compatibility with existing applications that handled HOVER_MOVE |
| // events in onGenericMotionEvent, dispatch the event there. The |
| // onHoverEvent method did not exist at the time. |
| if (action == MotionEvent.ACTION_HOVER_MOVE) { |
| dispatchGenericMotionEventInternal(event); |
| } |
| return true; |
| } |
| } else if (dispatchGenericPointerEvent(event)) { |
| return true; |
| } |
| } else if (dispatchGenericFocusedEvent(event)) { |
| return true; |
| } |
| |
| if (dispatchGenericMotionEventInternal(event)) { |
| return true; |
| } |
| |
| if (mInputEventConsistencyVerifier != null) { |
| mInputEventConsistencyVerifier.onUnhandledEvent(event, 0); |
| } |
| return false; |
| } |
| |
| private boolean dispatchGenericMotionEventInternal(MotionEvent event) { |
| //noinspection SimplifiableIfStatement |
| if (mOnGenericMotionListener != null && (mViewFlags & ENABLED_MASK) == ENABLED |
| && mOnGenericMotionListener.onGenericMotion(this, event)) { |
| return true; |
| } |
| |
| if (onGenericMotionEvent(event)) { |
| return true; |
| } |
| |
| if (mInputEventConsistencyVerifier != null) { |
| mInputEventConsistencyVerifier.onUnhandledEvent(event, 0); |
| } |
| return false; |
| } |
| |
| /** |
| * Dispatch a hover event. |
| * <p> |
| * Do not call this method directly. |
| * Call {@link #dispatchGenericMotionEvent(MotionEvent)} instead. |
| * </p> |
| * |
| * @param event The motion event to be dispatched. |
| * @return True if the event was handled by the view, false otherwise. |
| */ |
| protected boolean dispatchHoverEvent(MotionEvent event) { |
| switch (event.getAction()) { |
| case MotionEvent.ACTION_HOVER_ENTER: |
| if (!hasHoveredChild() && !mSendingHoverAccessibilityEvents) { |
| mSendingHoverAccessibilityEvents = true; |
| sendAccessibilityEvent(AccessibilityEvent.TYPE_VIEW_HOVER_ENTER); |
| } |
| break; |
| case MotionEvent.ACTION_HOVER_EXIT: |
| if (mSendingHoverAccessibilityEvents) { |
| mSendingHoverAccessibilityEvents = false; |
| sendAccessibilityEvent(AccessibilityEvent.TYPE_VIEW_HOVER_EXIT); |
| } |
| break; |
| } |
| |
| //noinspection SimplifiableIfStatement |
| if (mOnHoverListener != null && (mViewFlags & ENABLED_MASK) == ENABLED |
| && mOnHoverListener.onHover(this, event)) { |
| return true; |
| } |
| |
| return onHoverEvent(event); |
| } |
| |
| /** |
| * Returns true if the view has a child to which it has recently sent |
| * {@link MotionEvent#ACTION_HOVER_ENTER}. If this view is hovered and |
| * it does not have a hovered child, then it must be the innermost hovered view. |
| * @hide |
| */ |
| protected boolean hasHoveredChild() { |
| return false; |
| } |
| |
| /** |
| * Dispatch a generic motion event to the view under the first pointer. |
| * <p> |
| * Do not call this method directly. |
| * Call {@link #dispatchGenericMotionEvent(MotionEvent)} instead. |
| * </p> |
| * |
| * @param event The motion event to be dispatched. |
| * @return True if the event was handled by the view, false otherwise. |
| */ |
| protected boolean dispatchGenericPointerEvent(MotionEvent event) { |
| return false; |
| } |
| |
| /** |
| * Dispatch a generic motion event to the currently focused view. |
| * <p> |
| * Do not call this method directly. |
| * Call {@link #dispatchGenericMotionEvent(MotionEvent)} instead. |
| * </p> |
| * |
| * @param event The motion event to be dispatched. |
| * @return True if the event was handled by the view, false otherwise. |
| */ |
| protected boolean dispatchGenericFocusedEvent(MotionEvent event) { |
| return false; |
| } |
| |
| /** |
| * Dispatch a pointer event. |
| * <p> |
| * Dispatches touch related pointer events to {@link #onTouchEvent(MotionEvent)} and all |
| * other events to {@link #onGenericMotionEvent(MotionEvent)}. This separation of concerns |
| * reinforces the invariant that {@link #onTouchEvent(MotionEvent)} is really about touches |
| * and should not be expected to handle other pointing device features. |
| * </p> |
| * |
| * @param event The motion event to be dispatched. |
| * @return True if the event was handled by the view, false otherwise. |
| * @hide |
| */ |
| public final boolean dispatchPointerEvent(MotionEvent event) { |
| if (event.isTouchEvent()) { |
| return dispatchTouchEvent(event); |
| } else { |
| return dispatchGenericMotionEvent(event); |
| } |
| } |
| |
| /** |
| * Called when the window containing this view gains or loses window focus. |
| * ViewGroups should override to route to their children. |
| * |
| * @param hasFocus True if the window containing this view now has focus, |
| * false otherwise. |
| */ |
| public void dispatchWindowFocusChanged(boolean hasFocus) { |
| onWindowFocusChanged(hasFocus); |
| } |
| |
| /** |
| * Called when the window containing this view gains or loses focus. Note |
| * that this is separate from view focus: to receive key events, both |
| * your view and its window must have focus. If a window is displayed |
| * on top of yours that takes input focus, then your own window will lose |
| * focus but the view focus will remain unchanged. |
| * |
| * @param hasWindowFocus True if the window containing this view now has |
| * focus, false otherwise. |
| */ |
| public void onWindowFocusChanged(boolean hasWindowFocus) { |
| InputMethodManager imm = InputMethodManager.peekInstance(); |
| if (!hasWindowFocus) { |
| if (isPressed()) { |
| setPressed(false); |
| } |
| if (imm != null && (mPrivateFlags & FOCUSED) != 0) { |
| imm.focusOut(this); |
| } |
| removeLongPressCallback(); |
| removeTapCallback(); |
| onFocusLost(); |
| } else if (imm != null && (mPrivateFlags & FOCUSED) != 0) { |
| imm.focusIn(this); |
| } |
| refreshDrawableState(); |
| } |
| |
| /** |
| * Returns true if this view is in a window that currently has window focus. |
| * Note that this is not the same as the view itself having focus. |
| * |
| * @return True if this view is in a window that currently has window focus. |
| */ |
| public boolean hasWindowFocus() { |
| return mAttachInfo != null && mAttachInfo.mHasWindowFocus; |
| } |
| |
| /** |
| * Dispatch a view visibility change down the view hierarchy. |
| * ViewGroups should override to route to their children. |
| * @param changedView The view whose visibility changed. Could be 'this' or |
| * an ancestor view. |
| * @param visibility The new visibility of changedView: {@link #VISIBLE}, |
| * {@link #INVISIBLE} or {@link #GONE}. |
| */ |
| protected void dispatchVisibilityChanged(View changedView, int visibility) { |
| onVisibilityChanged(changedView, visibility); |
| } |
| |
| /** |
| * Called when the visibility of the view or an ancestor of the view is changed. |
| * @param changedView The view whose visibility changed. Could be 'this' or |
| * an ancestor view. |
| * @param visibility The new visibility of changedView: {@link #VISIBLE}, |
| * {@link #INVISIBLE} or {@link #GONE}. |
| */ |
| protected void onVisibilityChanged(View changedView, int visibility) { |
| if (visibility == VISIBLE) { |
| if (mAttachInfo != null) { |
| initialAwakenScrollBars(); |
| } else { |
| mPrivateFlags |= AWAKEN_SCROLL_BARS_ON_ATTACH; |
| } |
| } |
| } |
| |
| /** |
| * Dispatch a hint about whether this view is displayed. For instance, when |
| * a View moves out of the screen, it might receives a display hint indicating |
| * the view is not displayed. Applications should not <em>rely</em> on this hint |
| * as there is no guarantee that they will receive one. |
| * |
| * @param hint A hint about whether or not this view is displayed: |
| * {@link #VISIBLE} or {@link #INVISIBLE}. |
| */ |
| public void dispatchDisplayHint(int hint) { |
| onDisplayHint(hint); |
| } |
| |
| /** |
| * Gives this view a hint about whether is displayed or not. For instance, when |
| * a View moves out of the screen, it might receives a display hint indicating |
| * the view is not displayed. Applications should not <em>rely</em> on this hint |
| * as there is no guarantee that they will receive one. |
| * |
| * @param hint A hint about whether or not this view is displayed: |
| * {@link #VISIBLE} or {@link #INVISIBLE}. |
| */ |
| protected void onDisplayHint(int hint) { |
| } |
| |
| /** |
| * Dispatch a window visibility change down the view hierarchy. |
| * ViewGroups should override to route to their children. |
| * |
| * @param visibility The new visibility of the window. |
| * |
| * @see #onWindowVisibilityChanged(int) |
| */ |
| public void dispatchWindowVisibilityChanged(int visibility) { |
| onWindowVisibilityChanged(visibility); |
| } |
| |
| /** |
| * Called when the window containing has change its visibility |
| * (between {@link #GONE}, {@link #INVISIBLE}, and {@link #VISIBLE}). Note |
| * that this tells you whether or not your window is being made visible |
| * to the window manager; this does <em>not</em> tell you whether or not |
| * your window is obscured by other windows on the screen, even if it |
| * is itself visible. |
| * |
| * @param visibility The new visibility of the window. |
| */ |
| protected void onWindowVisibilityChanged(int visibility) { |
| if (visibility == VISIBLE) { |
| initialAwakenScrollBars(); |
| } |
| } |
| |
| /** |
| * Returns the current visibility of the window this view is attached to |
| * (either {@link #GONE}, {@link #INVISIBLE}, or {@link #VISIBLE}). |
| * |
| * @return Returns the current visibility of the view's window. |
| */ |
| public int getWindowVisibility() { |
| return mAttachInfo != null ? mAttachInfo.mWindowVisibility : GONE; |
| } |
| |
| /** |
| * Retrieve the overall visible display size in which the window this view is |
| * attached to has been positioned in. This takes into account screen |
| * decorations above the window, for both cases where the window itself |
| * is being position inside of them or the window is being placed under |
| * then and covered insets are used for the window to position its content |
| * inside. In effect, this tells you the available area where content can |
| * be placed and remain visible to users. |
| * |
| * <p>This function requires an IPC back to the window manager to retrieve |
| * the requested information, so should not be used in performance critical |
| * code like drawing. |
| * |
| * @param outRect Filled in with the visible display frame. If the view |
| * is not attached to a window, this is simply the raw display size. |
| */ |
| public void getWindowVisibleDisplayFrame(Rect outRect) { |
| if (mAttachInfo != null) { |
| try { |
| mAttachInfo.mSession.getDisplayFrame(mAttachInfo.mWindow, outRect); |
| } catch (RemoteException e) { |
| return; |
| } |
| // XXX This is really broken, and probably all needs to be done |
| // in the window manager, and we need to know more about whether |
| // we want the area behind or in front of the IME. |
| final Rect insets = mAttachInfo.mVisibleInsets; |
| outRect.left += insets.left; |
| outRect.top += insets.top; |
| outRect.right -= insets.right; |
| outRect.bottom -= insets.bottom; |
| return; |
| } |
| Display d = WindowManagerImpl.getDefault().getDefaultDisplay(); |
| d.getRectSize(outRect); |
| } |
| |
| /** |
| * Dispatch a notification about a resource configuration change down |
| * the view hierarchy. |
| * ViewGroups should override to route to their children. |
| * |
| * @param newConfig The new resource configuration. |
| * |
| * @see #onConfigurationChanged(android.content.res.Configuration) |
| */ |
| public void dispatchConfigurationChanged(Configuration newConfig) { |
| onConfigurationChanged(newConfig); |
| } |
| |
| /** |
| * Called when the current configuration of the resources being used |
| * by the application have changed. You can use this to decide when |
| * to reload resources that can changed based on orientation and other |
| * configuration characterstics. You only need to use this if you are |
| * not relying on the normal {@link android.app.Activity} mechanism of |
| * recreating the activity instance upon a configuration change. |
| * |
| * @param newConfig The new resource configuration. |
| */ |
| protected void onConfigurationChanged(Configuration newConfig) { |
| } |
| |
| /** |
| * Private function to aggregate all per-view attributes in to the view |
| * root. |
| */ |
| void dispatchCollectViewAttributes(int visibility) { |
| performCollectViewAttributes(visibility); |
| } |
| |
| void performCollectViewAttributes(int visibility) { |
| if ((visibility & VISIBILITY_MASK) == VISIBLE && mAttachInfo != null) { |
| if ((mViewFlags & KEEP_SCREEN_ON) == KEEP_SCREEN_ON) { |
| mAttachInfo.mKeepScreenOn = true; |
| } |
| mAttachInfo.mSystemUiVisibility |= mSystemUiVisibility; |
| if (mOnSystemUiVisibilityChangeListener != null) { |
| mAttachInfo.mHasSystemUiListeners = true; |
| } |
| } |
| } |
| |
| void needGlobalAttributesUpdate(boolean force) { |
| final AttachInfo ai = mAttachInfo; |
| if (ai != null) { |
| if (force || ai.mKeepScreenOn || (ai.mSystemUiVisibility != 0) |
| || ai.mHasSystemUiListeners) { |
| ai.mRecomputeGlobalAttributes = true; |
| } |
| } |
| } |
| |
| /** |
| * Returns whether the device is currently in touch mode. Touch mode is entered |
| * once the user begins interacting with the device by touch, and affects various |
| * things like whether focus is always visible to the user. |
| * |
| * @return Whether the device is in touch mode. |
| */ |
| @ViewDebug.ExportedProperty |
| public boolean isInTouchMode() { |
| if (mAttachInfo != null) { |
| return mAttachInfo.mInTouchMode; |
| } else { |
| return ViewAncestor.isInTouchMode(); |
| } |
| } |
| |
| /** |
| * Returns the context the view is running in, through which it can |
| * access the current theme, resources, etc. |
| * |
| * @return The view's Context. |
| */ |
| @ViewDebug.CapturedViewProperty |
| public final Context getContext() { |
| return mContext; |
| } |
| |
| /** |
| * Handle a key event before it is processed by any input method |
| * associated with the view hierarchy. This can be used to intercept |
| * key events in special situations before the IME consumes them; a |
| * typical example would be handling the BACK key to update the application's |
| * UI instead of allowing the IME to see it and close itself. |
| * |
| * @param keyCode The value in event.getKeyCode(). |
| * @param event Description of the key event. |
| * @return If you handled the event, return true. If you want to allow the |
| * event to be handled by the next receiver, return false. |
| */ |
| public boolean onKeyPreIme(int keyCode, KeyEvent event) { |
| return false; |
| } |
| |
| /** |
| * Default implementation of {@link KeyEvent.Callback#onKeyDown(int, KeyEvent) |
| * KeyEvent.Callback.onKeyDown()}: perform press of the view |
| * when {@link KeyEvent#KEYCODE_DPAD_CENTER} or {@link KeyEvent#KEYCODE_ENTER} |
| * is released, if the view is enabled and clickable. |
| * |
| * @param keyCode A key code that represents the button pressed, from |
| * {@link android.view.KeyEvent}. |
| * @param event The KeyEvent object that defines the button action. |
| */ |
| public boolean onKeyDown(int keyCode, KeyEvent event) { |
| boolean result = false; |
| |
| switch (keyCode) { |
| case KeyEvent.KEYCODE_DPAD_CENTER: |
| case KeyEvent.KEYCODE_ENTER: { |
| if ((mViewFlags & ENABLED_MASK) == DISABLED) { |
| return true; |
| } |
| // Long clickable items don't necessarily have to be clickable |
| if (((mViewFlags & CLICKABLE) == CLICKABLE || |
| (mViewFlags & LONG_CLICKABLE) == LONG_CLICKABLE) && |
| (event.getRepeatCount() == 0)) { |
| setPressed(true); |
| checkForLongClick(0); |
| return true; |
| } |
| break; |
| } |
| } |
| return result; |
| } |
| |
| /** |
| * Default implementation of {@link KeyEvent.Callback#onKeyLongPress(int, KeyEvent) |
| * KeyEvent.Callback.onKeyLongPress()}: always returns false (doesn't handle |
| * the event). |
| */ |
| public boolean onKeyLongPress(int keyCode, KeyEvent event) { |
| return false; |
| } |
| |
| /** |
| * Default implementation of {@link KeyEvent.Callback#onKeyUp(int, KeyEvent) |
| * KeyEvent.Callback.onKeyUp()}: perform clicking of the view |
| * when {@link KeyEvent#KEYCODE_DPAD_CENTER} or |
| * {@link KeyEvent#KEYCODE_ENTER} is released. |
| * |
| * @param keyCode A key code that represents the button pressed, from |
| * {@link android.view.KeyEvent}. |
| * @param event The KeyEvent object that defines the button action. |
| */ |
| public boolean onKeyUp(int keyCode, KeyEvent event) { |
| boolean result = false; |
| |
| switch (keyCode) { |
| case KeyEvent.KEYCODE_DPAD_CENTER: |
| case KeyEvent.KEYCODE_ENTER: { |
| if ((mViewFlags & ENABLED_MASK) == DISABLED) { |
| return true; |
| } |
| if ((mViewFlags & CLICKABLE) == CLICKABLE && isPressed()) { |
| setPressed(false); |
| |
| if (!mHasPerformedLongPress) { |
| // This is a tap, so remove the longpress check |
| removeLongPressCallback(); |
| |
| result = performClick(); |
| } |
| } |
| break; |
| } |
| } |
| return result; |
| } |
| |
| /** |
| * Default implementation of {@link KeyEvent.Callback#onKeyMultiple(int, int, KeyEvent) |
| * KeyEvent.Callback.onKeyMultiple()}: always returns false (doesn't handle |
| * the event). |
| * |
| * @param keyCode A key code that represents the button pressed, from |
| * {@link android.view.KeyEvent}. |
| * @param repeatCount The number of times the action was made. |
| * @param event The KeyEvent object that defines the button action. |
| */ |
| public boolean onKeyMultiple(int keyCode, int repeatCount, KeyEvent event) { |
| return false; |
| } |
| |
| /** |
| * Called on the focused view when a key shortcut event is not handled. |
| * Override this method to implement local key shortcuts for the View. |
| * Key shortcuts can also be implemented by setting the |
| * {@link MenuItem#setShortcut(char, char) shortcut} property of menu items. |
| * |
| * @param keyCode The value in event.getKeyCode(). |
| * @param event Description of the key event. |
| * @return If you handled the event, return true. If you want to allow the |
| * event to be handled by the next receiver, return false. |
| */ |
| public boolean onKeyShortcut(int keyCode, KeyEvent event) { |
| return false; |
| } |
| |
| /** |
| * Check whether the called view is a text editor, in which case it |
| * would make sense to automatically display a soft input window for |
| * it. Subclasses should override this if they implement |
| * {@link #onCreateInputConnection(EditorInfo)} to return true if |
| * a call on that method would return a non-null InputConnection, and |
| * they are really a first-class editor that the user would normally |
| * start typing on when the go into a window containing your view. |
| * |
| * <p>The default implementation always returns false. This does |
| * <em>not</em> mean that its {@link #onCreateInputConnection(EditorInfo)} |
| * will not be called or the user can not otherwise perform edits on your |
| * view; it is just a hint to the system that this is not the primary |
| * purpose of this view. |
| * |
| * @return Returns true if this view is a text editor, else false. |
| */ |
| public boolean onCheckIsTextEditor() { |
| return false; |
| } |
| |
| /** |
| * Create a new InputConnection for an InputMethod to interact |
| * with the view. The default implementation returns null, since it doesn't |
| * support input methods. You can override this to implement such support. |
| * This is only needed for views that take focus and text input. |
| * |
| * <p>When implementing this, you probably also want to implement |
| * {@link #onCheckIsTextEditor()} to indicate you will return a |
| * non-null InputConnection. |
| * |
| * @param outAttrs Fill in with attribute information about the connection. |
| */ |
| public InputConnection onCreateInputConnection(EditorInfo outAttrs) { |
| return null; |
| } |
| |
| /** |
| * Called by the {@link android.view.inputmethod.InputMethodManager} |
| * when a view who is not the current |
| * input connection target is trying to make a call on the manager. The |
| * default implementation returns false; you can override this to return |
| * true for certain views if you are performing InputConnection proxying |
| * to them. |
| * @param view The View that is making the InputMethodManager call. |
| * @return Return true to allow the call, false to reject. |
| */ |
| public boolean checkInputConnectionProxy(View view) { |
| return false; |
| } |
| |
| /** |
| * Show the context menu for this view. It is not safe to hold on to the |
| * menu after returning from this method. |
| * |
| * You should normally not overload this method. Overload |
| * {@link #onCreateContextMenu(ContextMenu)} or define an |
| * {@link OnCreateContextMenuListener} to add items to the context menu. |
| * |
| * @param menu The context menu to populate |
| */ |
| public void createContextMenu(ContextMenu menu) { |
| ContextMenuInfo menuInfo = getContextMenuInfo(); |
| |
| // Sets the current menu info so all items added to menu will have |
| // my extra info set. |
| ((MenuBuilder)menu).setCurrentMenuInfo(menuInfo); |
| |
| onCreateContextMenu(menu); |
| if (mOnCreateContextMenuListener != null) { |
| mOnCreateContextMenuListener.onCreateContextMenu(menu, this, menuInfo); |
| } |
| |
| // Clear the extra information so subsequent items that aren't mine don't |
| // have my extra info. |
| ((MenuBuilder)menu).setCurrentMenuInfo(null); |
| |
| if (mParent != null) { |
| mParent.createContextMenu(menu); |
| } |
| } |
| |
| /** |
| * Views should implement this if they have extra information to associate |
| * with the context menu. The return result is supplied as a parameter to |
| * the {@link OnCreateContextMenuListener#onCreateContextMenu(ContextMenu, View, ContextMenuInfo)} |
| * callback. |
| * |
| * @return Extra information about the item for which the context menu |
| * should be shown. This information will vary across different |
| * subclasses of View. |
| */ |
| protected ContextMenuInfo getContextMenuInfo() { |
| return null; |
| } |
| |
| /** |
| * Views should implement this if the view itself is going to add items to |
| * the context menu. |
| * |
| * @param menu the context menu to populate |
| */ |
| protected void onCreateContextMenu(ContextMenu menu) { |
| } |
| |
| /** |
| * Implement this method to handle trackball motion events. The |
| * <em>relative</em> movement of the trackball since the last event |
| * can be retrieve with {@link MotionEvent#getX MotionEvent.getX()} and |
| * {@link MotionEvent#getY MotionEvent.getY()}. These are normalized so |
| * that a movement of 1 corresponds to the user pressing one DPAD key (so |
| * they will often be fractional values, representing the more fine-grained |
| * movement information available from a trackball). |
| * |
| * @param event The motion event. |
| * @return True if the event was handled, false otherwise. |
| */ |
| public boolean onTrackballEvent(MotionEvent event) { |
| return false; |
| } |
| |
| /** |
| * Implement this method to handle generic motion events. |
| * <p> |
| * Generic motion events describe joystick movements, mouse hovers, track pad |
| * touches, scroll wheel movements and other input events. The |
| * {@link MotionEvent#getSource() source} of the motion event specifies |
| * the class of input that was received. Implementations of this method |
| * must examine the bits in the source before processing the event. |
| * The following code example shows how this is done. |
| * </p><p> |
| * Generic motion events with source class {@link InputDevice#SOURCE_CLASS_POINTER} |
| * are delivered to the view under the pointer. All other generic motion events are |
| * delivered to the focused view. |
| * </p> |
| * <code> |
| * public boolean onGenericMotionEvent(MotionEvent event) { |
| * if ((event.getSource() & InputDevice.SOURCE_CLASS_JOYSTICK) != 0) { |
| * if (event.getAction() == MotionEvent.ACTION_MOVE) { |
| * // process the joystick movement... |
| * return true; |
| * } |
| * } |
| * if ((event.getSource() & InputDevice.SOURCE_CLASS_POINTER) != 0) { |
| * switch (event.getAction()) { |
| * case MotionEvent.ACTION_HOVER_MOVE: |
| * // process the mouse hover movement... |
| * return true; |
| * case MotionEvent.ACTION_SCROLL: |
| * // process the scroll wheel movement... |
| * return true; |
| * } |
| * } |
| * return super.onGenericMotionEvent(event); |
| * } |
| * </code> |
| * |
| * @param event The generic motion event being processed. |
| * @return True if the event was handled, false otherwise. |
| */ |
| public boolean onGenericMotionEvent(MotionEvent event) { |
| return false; |
| } |
| |
| /** |
| * Implement this method to handle hover events. |
| * <p> |
| * This method is called whenever a pointer is hovering into, over, or out of the |
| * bounds of a view and the view is not currently being touched. |
| * Hover events are represented as pointer events with action |
| * {@link MotionEvent#ACTION_HOVER_ENTER}, {@link MotionEvent#ACTION_HOVER_MOVE}, |
| * or {@link MotionEvent#ACTION_HOVER_EXIT}. |
| * </p> |
| * <ul> |
| * <li>The view receives a hover event with action {@link MotionEvent#ACTION_HOVER_ENTER} |
| * when the pointer enters the bounds of the view.</li> |
| * <li>The view receives a hover event with action {@link MotionEvent#ACTION_HOVER_MOVE} |
| * when the pointer has already entered the bounds of the view and has moved.</li> |
| * <li>The view receives a hover event with action {@link MotionEvent#ACTION_HOVER_EXIT} |
| * when the pointer has exited the bounds of the view or when the pointer is |
| * about to go down due to a button click, tap, or similar user action that |
| * causes the view to be touched.</li> |
| * </ul> |
| * <p> |
| * The view should implement this method to return true to indicate that it is |
| * handling the hover event, such as by changing its drawable state. |
| * </p><p> |
| * The default implementation calls {@link #setHovered} to update the hovered state |
| * of the view when a hover enter or hover exit event is received, if the view |
| * is enabled and is clickable. |
| * </p> |
| * |
| * @param event The motion event that describes the hover. |
| * @return True if the view handled the hover event. |
| * |
| * @see #isHovered |
| * @see #setHovered |
| * @see #onHoverChanged |
| */ |
| public boolean onHoverEvent(MotionEvent event) { |
| if (isHoverable()) { |
| switch (event.getAction()) { |
| case MotionEvent.ACTION_HOVER_ENTER: |
| setHovered(true); |
| break; |
| case MotionEvent.ACTION_HOVER_EXIT: |
| setHovered(false); |
| break; |
| } |
| return true; |
| } |
| return false; |
| } |
| |
| /** |
| * Returns true if the view should handle {@link #onHoverEvent} |
| * by calling {@link #setHovered} to change its hovered state. |
| * |
| * @return True if the view is hoverable. |
| */ |
| private boolean isHoverable() { |
| final int viewFlags = mViewFlags; |
| //noinspection SimplifiableIfStatement |
| if ((viewFlags & ENABLED_MASK) == DISABLED) { |
| return false; |
| } |
| |
| return (viewFlags & CLICKABLE) == CLICKABLE |
| || (viewFlags & LONG_CLICKABLE) == LONG_CLICKABLE; |
| } |
| |
| /** |
| * Returns true if the view is currently hovered. |
| * |
| * @return True if the view is currently hovered. |
| * |
| * @see #setHovered |
| * @see #onHoverChanged |
| */ |
| @ViewDebug.ExportedProperty |
| public boolean isHovered() { |
| return (mPrivateFlags & HOVERED) != 0; |
| } |
| |
| /** |
| * Sets whether the view is currently hovered. |
| * <p> |
| * Calling this method also changes the drawable state of the view. This |
| * enables the view to react to hover by using different drawable resources |
| * to change its appearance. |
| * </p><p> |
| * The {@link #onHoverChanged} method is called when the hovered state changes. |
| * </p> |
| * |
| * @param hovered True if the view is hovered. |
| * |
| * @see #isHovered |
| * @see #onHoverChanged |
| */ |
| public void setHovered(boolean hovered) { |
| if (hovered) { |
| if ((mPrivateFlags & HOVERED) == 0) { |
| mPrivateFlags |= HOVERED; |
| refreshDrawableState(); |
| onHoverChanged(true); |
| } |
| } else { |
| if ((mPrivateFlags & HOVERED) != 0) { |
| mPrivateFlags &= ~HOVERED; |
| refreshDrawableState(); |
| onHoverChanged(false); |
| } |
| } |
| } |
| |
| /** |
| * Implement this method to handle hover state changes. |
| * <p> |
| * This method is called whenever the hover state changes as a result of a |
| * call to {@link #setHovered}. |
| * </p> |
| * |
| * @param hovered The current hover state, as returned by {@link #isHovered}. |
| * |
| * @see #isHovered |
| * @see #setHovered |
| */ |
| public void onHoverChanged(boolean hovered) { |
| } |
| |
| /** |
| * Implement this method to handle touch screen motion events. |
| * |
| * @param event The motion event. |
| * @return True if the event was handled, false otherwise. |
| */ |
| public boolean onTouchEvent(MotionEvent event) { |
| final int viewFlags = mViewFlags; |
| |
| if ((viewFlags & ENABLED_MASK) == DISABLED) { |
| if (event.getAction() == MotionEvent.ACTION_UP && (mPrivateFlags & PRESSED) != 0) { |
| mPrivateFlags &= ~PRESSED; |
| refreshDrawableState(); |
| } |
| // A disabled view that is clickable still consumes the touch |
| // events, it just doesn't respond to them. |
| return (((viewFlags & CLICKABLE) == CLICKABLE || |
| (viewFlags & LONG_CLICKABLE) == LONG_CLICKABLE)); |
| } |
| |
| if (mTouchDelegate != null) { |
| if (mTouchDelegate.onTouchEvent(event)) { |
| return true; |
| } |
| } |
| |
| if (((viewFlags & CLICKABLE) == CLICKABLE || |
| (viewFlags & LONG_CLICKABLE) == LONG_CLICKABLE)) { |
| switch (event.getAction()) { |
| case MotionEvent.ACTION_UP: |
| boolean prepressed = (mPrivateFlags & PREPRESSED) != 0; |
| if ((mPrivateFlags & PRESSED) != 0 || prepressed) { |
| // take focus if we don't have it already and we should in |
| // touch mode. |
| boolean focusTaken = false; |
| if (isFocusable() && isFocusableInTouchMode() && !isFocused()) { |
| focusTaken = requestFocus(); |
| } |
| |
| if (prepressed) { |
| // The button is being released before we actually |
| // showed it as pressed. Make it show the pressed |
| // state now (before scheduling the click) to ensure |
| // the user sees it. |
| mPrivateFlags |= PRESSED; |
| refreshDrawableState(); |
| } |
| |
| if (!mHasPerformedLongPress) { |
| // This is a tap, so remove the longpress check |
| removeLongPressCallback(); |
| |
| // Only perform take click actions if we were in the pressed state |
| if (!focusTaken) { |
| // Use a Runnable and post this rather than calling |
| // performClick directly. This lets other visual state |
| // of the view update before click actions start. |
| if (mPerformClick == null) { |
| mPerformClick = new PerformClick(); |
| } |
| if (!post(mPerformClick)) { |
| performClick(); |
| } |
| } |
| } |
| |
| if (mUnsetPressedState == null) { |
| mUnsetPressedState = new UnsetPressedState(); |
| } |
| |
| if (prepressed) { |
| postDelayed(mUnsetPressedState, |
| ViewConfiguration.getPressedStateDuration()); |
| } else if (!post(mUnsetPressedState)) { |
| // If the post failed, unpress right now |
| mUnsetPressedState.run(); |
| } |
| removeTapCallback(); |
| } |
| break; |
| |
| case MotionEvent.ACTION_DOWN: |
| mHasPerformedLongPress = false; |
| |
| if (performButtonActionOnTouchDown(event)) { |
| break; |
| } |
| |
| // Walk up the hierarchy to determine if we're inside a scrolling container. |
| boolean isInScrollingContainer = false; |
| ViewParent p = getParent(); |
| while (p != null && p instanceof ViewGroup) { |
| if (((ViewGroup) p).shouldDelayChildPressedState()) { |
| isInScrollingContainer = true; |
| break; |
| } |
| p = p.getParent(); |
| } |
| |
| // For views inside a scrolling container, delay the pressed feedback for |
| // a short period in case this is a scroll. |
| if (isInScrollingContainer) { |
| mPrivateFlags |= PREPRESSED; |
| if (mPendingCheckForTap == null) { |
| mPendingCheckForTap = new CheckForTap(); |
| } |
| postDelayed(mPendingCheckForTap, ViewConfiguration.getTapTimeout()); |
| } else { |
| // Not inside a scrolling container, so show the feedback right away |
| mPrivateFlags |= PRESSED; |
| refreshDrawableState(); |
| checkForLongClick(0); |
| } |
| break; |
| |
| case MotionEvent.ACTION_CANCEL: |
| mPrivateFlags &= ~PRESSED; |
| refreshDrawableState(); |
| removeTapCallback(); |
| break; |
| |
| case MotionEvent.ACTION_MOVE: |
| final int x = (int) event.getX(); |
| final int y = (int) event.getY(); |
| |
| // Be lenient about moving outside of buttons |
| if (!pointInView(x, y, mTouchSlop)) { |
| // Outside button |
| removeTapCallback(); |
| if ((mPrivateFlags & PRESSED) != 0) { |
| // Remove any future long press/tap checks |
| removeLongPressCallback(); |
| |
| // Need to switch from pressed to not pressed |
| mPrivateFlags &= ~PRESSED; |
| refreshDrawableState(); |
| } |
| } |
| break; |
| } |
| return true; |
| } |
| |
| return false; |
| } |
| |
| /** |
| * Remove the longpress detection timer. |
| */ |
| private void removeLongPressCallback() { |
| if (mPendingCheckForLongPress != null) { |
| removeCallbacks(mPendingCheckForLongPress); |
| } |
| } |
| |
| /** |
| * Remove the pending click action |
| */ |
| private void removePerformClickCallback() { |
| if (mPerformClick != null) { |
| removeCallbacks(mPerformClick); |
| } |
| } |
| |
| /** |
| * Remove the prepress detection timer. |
| */ |
| private void removeUnsetPressCallback() { |
| if ((mPrivateFlags & PRESSED) != 0 && mUnsetPressedState != null) { |
| setPressed(false); |
| removeCallbacks(mUnsetPressedState); |
| } |
| } |
| |
| /** |
| * Remove the tap detection timer. |
| */ |
| private void removeTapCallback() { |
| if (mPendingCheckForTap != null) { |
| mPrivateFlags &= ~PREPRESSED; |
| removeCallbacks(mPendingCheckForTap); |
| } |
| } |
| |
| /** |
| * Cancels a pending long press. Your subclass can use this if you |
| * want the context menu to come up if the user presses and holds |
| * at the same place, but you don't want it to come up if they press |
| * and then move around enough to cause scrolling. |
| */ |
| public void cancelLongPress() { |
| removeLongPressCallback(); |
| |
| /* |
| * The prepressed state handled by the tap callback is a display |
| * construct, but the tap callback will post a long press callback |
| * less its own timeout. Remove it here. |
| */ |
| removeTapCallback(); |
| } |
| |
| /** |
| * Remove the pending callback for sending a |
| * {@link AccessibilityEvent#TYPE_VIEW_SCROLLED} accessibility event. |
| */ |
| private void removeSendViewScrolledAccessibilityEventCallback() { |
| if (mSendViewScrolledAccessibilityEvent != null) { |
| removeCallbacks(mSendViewScrolledAccessibilityEvent); |
| } |
| } |
| |
| /** |
| * Sets the TouchDelegate for this View. |
| */ |
| public void setTouchDelegate(TouchDelegate delegate) { |
| mTouchDelegate = delegate; |
| } |
| |
| /** |
| * Gets the TouchDelegate for this View. |
| */ |
| public TouchDelegate getTouchDelegate() { |
| return mTouchDelegate; |
| } |
| |
| /** |
| * Set flags controlling behavior of this view. |
| * |
| * @param flags Constant indicating the value which should be set |
| * @param mask Constant indicating the bit range that should be changed |
| */ |
| void setFlags(int flags, int mask) { |
| int old = mViewFlags; |
| mViewFlags = (mViewFlags & ~mask) | (flags & mask); |
| |
| int changed = mViewFlags ^ old; |
| if (changed == 0) { |
| return; |
| } |
| int privateFlags = mPrivateFlags; |
| |
| /* Check if the FOCUSABLE bit has changed */ |
| if (((changed & FOCUSABLE_MASK) != 0) && |
| ((privateFlags & HAS_BOUNDS) !=0)) { |
| if (((old & FOCUSABLE_MASK) == FOCUSABLE) |
| && ((privateFlags & FOCUSED) != 0)) { |
| /* Give up focus if we are no longer focusable */ |
| clearFocus(); |
| } else if (((old & FOCUSABLE_MASK) == NOT_FOCUSABLE) |
| && ((privateFlags & FOCUSED) == 0)) { |
| /* |
| * Tell the view system that we are now available to take focus |
| * if no one else already has it. |
| */ |
| if (mParent != null) mParent.focusableViewAvailable(this); |
| } |
| } |
| |
| if ((flags & VISIBILITY_MASK) == VISIBLE) { |
| if ((changed & VISIBILITY_MASK) != 0) { |
| /* |
| * If this view is becoming visible, set the DRAWN flag so that |
| * the next invalidate() will not be skipped. |
| */ |
| mPrivateFlags |= DRAWN; |
| |
| needGlobalAttributesUpdate(true); |
| |
| // a view becoming visible is worth notifying the parent |
| // about in case nothing has focus. even if this specific view |
| // isn't focusable, it may contain something that is, so let |
| // the root view try to give this focus if nothing else does. |
| if ((mParent != null) && (mBottom > mTop) && (mRight > mLeft)) { |
| mParent.focusableViewAvailable(this); |
| } |
| } |
| } |
| |
| /* Check if the GONE bit has changed */ |
| if ((changed & GONE) != 0) { |
| needGlobalAttributesUpdate(false); |
| requestLayout(); |
| invalidate(true); |
| |
| if (((mViewFlags & VISIBILITY_MASK) == GONE)) { |
| if (hasFocus()) clearFocus(); |
| destroyDrawingCache(); |
| } |
| if (mAttachInfo != null) { |
| mAttachInfo.mViewVisibilityChanged = true; |
| } |
| } |
| |
| /* Check if the VISIBLE bit has changed */ |
| if ((changed & INVISIBLE) != 0) { |
| needGlobalAttributesUpdate(false); |
| /* |
| * If this view is becoming invisible, set the DRAWN flag so that |
| * the next invalidate() will not be skipped. |
| */ |
| mPrivateFlags |= DRAWN; |
| |
| if (((mViewFlags & VISIBILITY_MASK) == INVISIBLE) && hasFocus()) { |
| // root view becoming invisible shouldn't clear focus |
| if (getRootView() != this) { |
| clearFocus(); |
| } |
| } |
| if (mAttachInfo != null) { |
| mAttachInfo.mViewVisibilityChanged = true; |
| } |
| } |
| |
| if ((changed & VISIBILITY_MASK) != 0) { |
| if (mParent instanceof ViewGroup) { |
| ((ViewGroup) mParent).onChildVisibilityChanged(this, (flags & VISIBILITY_MASK)); |
| ((View) mParent).invalidate(true); |
| } |
| dispatchVisibilityChanged(this, (flags & VISIBILITY_MASK)); |
| } |
| |
| if ((changed & WILL_NOT_CACHE_DRAWING) != 0) { |
| destroyDrawingCache(); |
| } |
| |
| if ((changed & DRAWING_CACHE_ENABLED) != 0) { |
| destroyDrawingCache(); |
| mPrivateFlags &= ~DRAWING_CACHE_VALID; |
| invalidateParentCaches(); |
| } |
| |
| if ((changed & DRAWING_CACHE_QUALITY_MASK) != 0) { |
| destroyDrawingCache(); |
| mPrivateFlags &= ~DRAWING_CACHE_VALID; |
| } |
| |
| if ((changed & DRAW_MASK) != 0) { |
| if ((mViewFlags & WILL_NOT_DRAW) != 0) { |
| if (mBGDrawable != null) { |
| mPrivateFlags &= ~SKIP_DRAW; |
| mPrivateFlags |= ONLY_DRAWS_BACKGROUND; |
| } else { |
| mPrivateFlags |= SKIP_DRAW; |
| } |
| } else { |
| mPrivateFlags &= ~SKIP_DRAW; |
| } |
| requestLayout(); |
| invalidate(true); |
| } |
| |
| if ((changed & KEEP_SCREEN_ON) != 0) { |
| if (mParent != null && mAttachInfo != null && !mAttachInfo.mRecomputeGlobalAttributes) { |
| mParent.recomputeViewAttributes(this); |
| } |
| } |
| |
| if ((changed & LAYOUT_DIRECTION_MASK) != 0) { |
| requestLayout(); |
| } |
| } |
| |
| /** |
| * Change the view's z order in the tree, so it's on top of other sibling |
| * views |
| */ |
| public void bringToFront() { |
| if (mParent != null) { |
| mParent.bringChildToFront(this); |
| } |
| } |
| |
| /** |
| * This is called in response to an internal scroll in this view (i.e., the |
| * view scrolled its own contents). This is typically as a result of |
| * {@link #scrollBy(int, int)} or {@link #scrollTo(int, int)} having been |
| * called. |
| * |
| * @param l Current horizontal scroll origin. |
| * @param t Current vertical scroll origin. |
| * @param oldl Previous horizontal scroll origin. |
| * @param oldt Previous vertical scroll origin. |
| */ |
| protected void onScrollChanged(int l, int t, int oldl, int oldt) { |
| if (AccessibilityManager.getInstance(mContext).isEnabled()) { |
| postSendViewScrolledAccessibilityEventCallback(); |
| } |
| |
| mBackgroundSizeChanged = true; |
| |
| final AttachInfo ai = mAttachInfo; |
| if (ai != null) { |
| ai.mViewScrollChanged = true; |
| } |
| } |
| |
| /** |
| * Interface definition for a callback to be invoked when the layout bounds of a view |
| * changes due to layout processing. |
| */ |
| public interface OnLayoutChangeListener { |
| /** |
| * Called when the focus state of a view has changed. |
| * |
| * @param v The view whose state has changed. |
| * @param left The new value of the view's left property. |
| * @param top The new value of the view's top property. |
| * @param right The new value of the view's right property. |
| * @param bottom The new value of the view's bottom property. |
| * @param oldLeft The previous value of the view's left property. |
| * @param oldTop The previous value of the view's top property. |
| * @param oldRight The previous value of the view's right property. |
| * @param oldBottom The previous value of the view's bottom property. |
| */ |
| void onLayoutChange(View v, int left, int top, int right, int bottom, |
| int oldLeft, int oldTop, int oldRight, int oldBottom); |
| } |
| |
| /** |
| * This is called during layout when the size of this view has changed. If |
| * you were just added to the view hierarchy, you're called with the old |
| * values of 0. |
| * |
| * @param w Current width of this view. |
| * @param h Current height of this view. |
| * @param oldw Old width of this view. |
| * @param oldh Old height of this view. |
| */ |
| protected void onSizeChanged(int w, int h, int oldw, int oldh) { |
| } |
| |
| /** |
| * Called by draw to draw the child views. This may be overridden |
| * by derived classes to gain control just before its children are drawn |
| * (but after its own view has been drawn). |
| * @param canvas the canvas on which to draw the view |
| */ |
| protected void dispatchDraw(Canvas canvas) { |
| } |
| |
| /** |
| * Gets the parent of this view. Note that the parent is a |
| * ViewParent and not necessarily a View. |
| * |
| * @return Parent of this view. |
| */ |
| public final ViewParent getParent() { |
| return mParent; |
| } |
| |
| /** |
| * Set the horizontal scrolled position of your view. This will cause a call to |
| * {@link #onScrollChanged(int, int, int, int)} and the view will be |
| * invalidated. |
| * @param value the x position to scroll to |
| */ |
| public void setScrollX(int value) { |
| scrollTo(value, mScrollY); |
| } |
| |
| /** |
| * Set the vertical scrolled position of your view. This will cause a call to |
| * {@link #onScrollChanged(int, int, int, int)} and the view will be |
| * invalidated. |
| * @param value the y position to scroll to |
| */ |
| public void setScrollY(int value) { |
| scrollTo(mScrollX, value); |
| } |
| |
| /** |
| * Return the scrolled left position of this view. This is the left edge of |
| * the displayed part of your view. You do not need to draw any pixels |
| * farther left, since those are outside of the frame of your view on |
| * screen. |
| * |
| * @return The left edge of the displayed part of your view, in pixels. |
| */ |
| public final int getScrollX() { |
| return mScrollX; |
| } |
| |
| /** |
| * Return the scrolled top position of this view. This is the top edge of |
| * the displayed part of your view. You do not need to draw any pixels above |
| * it, since those are outside of the frame of your view on screen. |
| * |
| * @return The top edge of the displayed part of your view, in pixels. |
| */ |
| public final int getScrollY() { |
| return mScrollY; |
| } |
| |
| /** |
| * Return the width of the your view. |
| * |
| * @return The width of your view, in pixels. |
| */ |
| @ViewDebug.ExportedProperty(category = "layout") |
| public final int getWidth() { |
| return mRight - mLeft; |
| } |
| |
| /** |
| * Return the height of your view. |
| * |
| * @return The height of your view, in pixels. |
| */ |
| @ViewDebug.ExportedProperty(category = "layout") |
| public final int getHeight() { |
| return mBottom - mTop; |
| } |
| |
| /** |
| * Return the visible drawing bounds of your view. Fills in the output |
| * rectangle with the values from getScrollX(), getScrollY(), |
| * getWidth(), and getHeight(). |
| * |
| * @param outRect The (scrolled) drawing bounds of the view. |
| */ |
| public void getDrawingRect(Rect outRect) { |
| outRect.left = mScrollX; |
| outRect.top = mScrollY; |
| outRect.right = mScrollX + (mRight - mLeft); |
| outRect.bottom = mScrollY + (mBottom - mTop); |
| } |
| |
| /** |
| * Like {@link #getMeasuredWidthAndState()}, but only returns the |
| * raw width component (that is the result is masked by |
| * {@link #MEASURED_SIZE_MASK}). |
| * |
| * @return The raw measured width of this view. |
| */ |
| public final int getMeasuredWidth() { |
| return mMeasuredWidth & MEASURED_SIZE_MASK; |
| } |
| |
| /** |
| * Return the full width measurement information for this view as computed |
| * by the most recent call to {@link #measure(int, int)}. This result is a bit mask |
| * as defined by {@link #MEASURED_SIZE_MASK} and {@link #MEASURED_STATE_TOO_SMALL}. |
| * This should be used during measurement and layout calculations only. Use |
| * {@link #getWidth()} to see how wide a view is after layout. |
| * |
| * @return The measured width of this view as a bit mask. |
| */ |
| public final int getMeasuredWidthAndState() { |
| return mMeasuredWidth; |
| } |
| |
| /** |
| * Like {@link #getMeasuredHeightAndState()}, but only returns the |
| * raw width component (that is the result is masked by |
| * {@link #MEASURED_SIZE_MASK}). |
| * |
| * @return The raw measured height of this view. |
| */ |
| public final int getMeasuredHeight() { |
| return mMeasuredHeight & MEASURED_SIZE_MASK; |
| } |
| |
| /** |
| * Return the full height measurement information for this view as computed |
| * by the most recent call to {@link #measure(int, int)}. This result is a bit mask |
| * as defined by {@link #MEASURED_SIZE_MASK} and {@link #MEASURED_STATE_TOO_SMALL}. |
| * This should be used during measurement and layout calculations only. Use |
| * {@link #getHeight()} to see how wide a view is after layout. |
| * |
| * @return The measured width of this view as a bit mask. |
| */ |
| public final int getMeasuredHeightAndState() { |
| return mMeasuredHeight; |
| } |
| |
| /** |
| * Return only the state bits of {@link #getMeasuredWidthAndState()} |
| * and {@link #getMeasuredHeightAndState()}, combined into one integer. |
| * The width component is in the regular bits {@link #MEASURED_STATE_MASK} |
| * and the height component is at the shifted bits |
| * {@link #MEASURED_HEIGHT_STATE_SHIFT}>>{@link #MEASURED_STATE_MASK}. |
| */ |
| public final int getMeasuredState() { |
| return (mMeasuredWidth&MEASURED_STATE_MASK) |
| | ((mMeasuredHeight>>MEASURED_HEIGHT_STATE_SHIFT) |
| & (MEASURED_STATE_MASK>>MEASURED_HEIGHT_STATE_SHIFT)); |
| } |
| |
| /** |
| * The transform matrix of this view, which is calculated based on the current |
| * roation, scale, and pivot properties. |
| * |
| * @see #getRotation() |
| * @see #getScaleX() |
| * @see #getScaleY() |
| * @see #getPivotX() |
| * @see #getPivotY() |
| * @return The current transform matrix for the view |
| */ |
| public Matrix getMatrix() { |
| updateMatrix(); |
| return mMatrix; |
| } |
| |
| /** |
| * Utility function to determine if the value is far enough away from zero to be |
| * considered non-zero. |
| * @param value A floating point value to check for zero-ness |
| * @return whether the passed-in value is far enough away from zero to be considered non-zero |
| */ |
| private static boolean nonzero(float value) { |
| return (value < -NONZERO_EPSILON || value > NONZERO_EPSILON); |
| } |
| |
| /** |
| * Returns true if the transform matrix is the identity matrix. |
| * Recomputes the matrix if necessary. |
| * |
| * @return True if the transform matrix is the identity matrix, false otherwise. |
| */ |
| final boolean hasIdentityMatrix() { |
| updateMatrix(); |
| return mMatrixIsIdentity; |
| } |
| |
| /** |
| * Recomputes the transform matrix if necessary. |
| */ |
| private void updateMatrix() { |
| if (mMatrixDirty) { |
| // transform-related properties have changed since the last time someone |
| // asked for the matrix; recalculate it with the current values |
| |
| // Figure out if we need to update the pivot point |
| if ((mPrivateFlags & PIVOT_EXPLICITLY_SET) == 0) { |
| if ((mRight - mLeft) != mPrevWidth || (mBottom - mTop) != mPrevHeight) { |
| mPrevWidth = mRight - mLeft; |
| mPrevHeight = mBottom - mTop; |
| mPivotX = mPrevWidth / 2f; |
| mPivotY = mPrevHeight / 2f; |
| } |
| } |
| mMatrix.reset(); |
| if (!nonzero(mRotationX) && !nonzero(mRotationY)) { |
| mMatrix.setTranslate(mTranslationX, mTranslationY); |
| mMatrix.preRotate(mRotation, mPivotX, mPivotY); |
| mMatrix.preScale(mScaleX, mScaleY, mPivotX, mPivotY); |
| } else { |
| if (mCamera == null) { |
| mCamera = new Camera(); |
| matrix3D = new Matrix(); |
| } |
| mCamera.save(); |
| mMatrix.preScale(mScaleX, mScaleY, mPivotX, mPivotY); |
| mCamera.rotate(mRotationX, mRotationY, -mRotation); |
| mCamera.getMatrix(matrix3D); |
| matrix3D.preTranslate(-mPivotX, -mPivotY); |
| matrix3D.postTranslate(mPivotX + mTranslationX, mPivotY + mTranslationY); |
| mMatrix.postConcat(matrix3D); |
| mCamera.restore(); |
| } |
| mMatrixDirty = false; |
| mMatrixIsIdentity = mMatrix.isIdentity(); |
| mInverseMatrixDirty = true; |
| } |
| } |
| |
| /** |
| * Utility method to retrieve the inverse of the current mMatrix property. |
| * We cache the matrix to avoid recalculating it when transform properties |
| * have not changed. |
| * |
| * @return The inverse of the current matrix of this view. |
| */ |
| final Matrix getInverseMatrix() { |
| updateMatrix(); |
| if (mInverseMatrixDirty) { |
| if (mInverseMatrix == null) { |
| mInverseMatrix = new Matrix(); |
| } |
| mMatrix.invert(mInverseMatrix); |
| mInverseMatrixDirty = false; |
| } |
| return mInverseMatrix; |
| } |
| |
| /** |
| * <p>Sets the distance along the Z axis (orthogonal to the X/Y plane on which |
| * views are drawn) from the camera to this view. The camera's distance |
| * affects 3D transformations, for instance rotations around the X and Y |
| * axis. If the rotationX or rotationY properties are changed and this view is |
| * large (more than half the size of the screen), it is recommended to always |
| * use a camera distance that's greater than the height (X axis rotation) or |
| * the width (Y axis rotation) of this view.</p> |
| * |
| * <p>The distance of the camera from the view plane can have an affect on the |
| * perspective distortion of the view when it is rotated around the x or y axis. |
| * For example, a large distance will result in a large viewing angle, and there |
| * will not be much perspective distortion of the view as it rotates. A short |
| * distance may cause much more perspective distortion upon rotation, and can |
| * also result in some drawing artifacts if the rotated view ends up partially |
| * behind the camera (which is why the recommendation is to use a distance at |
| * least as far as the size of the view, if the view is to be rotated.)</p> |
| * |
| * <p>The distance is expressed in "depth pixels." The default distance depends |
| * on the screen density. For instance, on a medium density display, the |
| * default distance is 1280. On a high density display, the default distance |
| * is 1920.</p> |
| * |
| * <p>If you want to specify a distance that leads to visually consistent |
| * results across various densities, use the following formula:</p> |
| * <pre> |
| * float scale = context.getResources().getDisplayMetrics().density; |
| * view.setCameraDistance(distance * scale); |
| * </pre> |
| * |
| * <p>The density scale factor of a high density display is 1.5, |
| * and 1920 = 1280 * 1.5.</p> |
| * |
| * @param distance The distance in "depth pixels", if negative the opposite |
| * value is used |
| * |
| * @see #setRotationX(float) |
| * @see #setRotationY(float) |
| */ |
| public void setCameraDistance(float distance) { |
| invalidateParentCaches(); |
| invalidate(false); |
| |
| final float dpi = mResources.getDisplayMetrics().densityDpi; |
| if (mCamera == null) { |
| mCamera = new Camera(); |
| matrix3D = new Matrix(); |
| } |
| |
| mCamera.setLocation(0.0f, 0.0f, -Math.abs(distance) / dpi); |
| mMatrixDirty = true; |
| |
| invalidate(false); |
| } |
| |
| /** |
| * The degrees that the view is rotated around the pivot point. |
| * |
| * @see #setRotation(float) |
| * @see #getPivotX() |
| * @see #getPivotY() |
| * |
| * @return The degrees of rotation. |
| */ |
| public float getRotation() { |
| return mRotation; |
| } |
| |
| /** |
| * Sets the degrees that the view is rotated around the pivot point. Increasing values |
| * result in clockwise rotation. |
| * |
| * @param rotation The degrees of rotation. |
| * |
| * @see #getRotation() |
| * @see #getPivotX() |
| * @see #getPivotY() |
| * @see #setRotationX(float) |
| * @see #setRotationY(float) |
| * |
| * @attr ref android.R.styleable#View_rotation |
| */ |
| public void setRotation(float rotation) { |
| if (mRotation != rotation) { |
| invalidateParentCaches(); |
| // Double-invalidation is necessary to capture view's old and new areas |
| invalidate(false); |
| mRotation = rotation; |
| mMatrixDirty = true; |
| mPrivateFlags |= DRAWN; // force another invalidation with the new orientation |
| invalidate(false); |
| } |
| } |
| |
| /** |
| * The degrees that the view is rotated around the vertical axis through the pivot point. |
| * |
| * @see #getPivotX() |
| * @see #getPivotY() |
| * @see #setRotationY(float) |
| * |
| * @return The degrees of Y rotation. |
| */ |
| public float getRotationY() { |
| return mRotationY; |
| } |
| |
| /** |
| * Sets the degrees that the view is rotated around the vertical axis through the pivot point. |
| * Increasing values result in counter-clockwise rotation from the viewpoint of looking |
| * down the y axis. |
| * |
| * When rotating large views, it is recommended to adjust the camera distance |
| * accordingly. Refer to {@link #setCameraDistance(float)} for more information. |
| * |
| * @param rotationY The degrees of Y rotation. |
| * |
| * @see #getRotationY() |
| * @see #getPivotX() |
| * @see #getPivotY() |
| * @see #setRotation(float) |
| * @see #setRotationX(float) |
| * @see #setCameraDistance(float) |
| * |
| * @attr ref android.R.styleable#View_rotationY |
| */ |
| public void setRotationY(float rotationY) { |
| if (mRotationY != rotationY) { |
| invalidateParentCaches(); |
| // Double-invalidation is necessary to capture view's old and new areas |
| invalidate(false); |
| mRotationY = rotationY; |
| mMatrixDirty = true; |
| mPrivateFlags |= DRAWN; // force another invalidation with the new orientation |
| invalidate(false); |
| } |
| } |
| |
| /** |
| * The degrees that the view is rotated around the horizontal axis through the pivot point. |
| * |
| * @see #getPivotX() |
| * @see #getPivotY() |
| * @see #setRotationX(float) |
| * |
| * @return The degrees of X rotation. |
| */ |
| public float getRotationX() { |
| return mRotationX; |
| } |
| |
| /** |
| * Sets the degrees that the view is rotated around the horizontal axis through the pivot point. |
| * Increasing values result in clockwise rotation from the viewpoint of looking down the |
| * x axis. |
| * |
| * When rotating large views, it is recommended to adjust the camera distance |
| * accordingly. Refer to {@link #setCameraDistance(float)} for more information. |
| * |
| * @param rotationX The degrees of X rotation. |
| * |
| * @see #getRotationX() |
| * @see #getPivotX() |
| * @see #getPivotY() |
| * @see #setRotation(float) |
| * @see #setRotationY(float) |
| * @see #setCameraDistance(float) |
| * |
| * @attr ref android.R.styleable#View_rotationX |
| */ |
| public void setRotationX(float rotationX) { |
| if (mRotationX != rotationX) { |
| invalidateParentCaches(); |
| // Double-invalidation is necessary to capture view's old and new areas |
| invalidate(false); |
| mRotationX = rotationX; |
| mMatrixDirty = true; |
| mPrivateFlags |= DRAWN; // force another invalidation with the new orientation |
| invalidate(false); |
| } |
| } |
| |
| /** |
| * The amount that the view is scaled in x around the pivot point, as a proportion of |
| * the view's unscaled width. A value of 1, the default, means that no scaling is applied. |
| * |
| * <p>By default, this is 1.0f. |
| * |
| * @see #getPivotX() |
| * @see #getPivotY() |
| * @return The scaling factor. |
| */ |
| public float getScaleX() { |
| return mScaleX; |
| } |
| |
| /** |
| * Sets the amount that the view is scaled in x around the pivot point, as a proportion of |
| * the view's unscaled width. A value of 1 means that no scaling is applied. |
| * |
| * @param scaleX The scaling factor. |
| * @see #getPivotX() |
| * @see #getPivotY() |
| * |
| * @attr ref android.R.styleable#View_scaleX |
| */ |
| public void setScaleX(float scaleX) { |
| if (mScaleX != scaleX) { |
| invalidateParentCaches(); |
| // Double-invalidation is necessary to capture view's old and new areas |
| invalidate(false); |
| mScaleX = scaleX; |
| mMatrixDirty = true; |
| mPrivateFlags |= DRAWN; // force another invalidation with the new orientation |
| invalidate(false); |
| } |
| } |
| |
| /** |
| * The amount that the view is scaled in y around the pivot point, as a proportion of |
| * the view's unscaled height. A value of 1, the default, means that no scaling is applied. |
| * |
| * <p>By default, this is 1.0f. |
| * |
| * @see #getPivotX() |
| * @see #getPivotY() |
| * @return The scaling factor. |
| */ |
| public float getScaleY() { |
| return mScaleY; |
| } |
| |
| /** |
| * Sets the amount that the view is scaled in Y around the pivot point, as a proportion of |
| * the view's unscaled width. A value of 1 means that no scaling is applied. |
| * |
| * @param scaleY The scaling factor. |
| * @see #getPivotX() |
| * @see #getPivotY() |
| * |
| * @attr ref android.R.styleable#View_scaleY |
| */ |
| public void setScaleY(float scaleY) { |
| if (mScaleY != scaleY) { |
| invalidateParentCaches(); |
| // Double-invalidation is necessary to capture view's old and new areas |
| invalidate(false); |
| mScaleY = scaleY; |
| mMatrixDirty = true; |
| mPrivateFlags |= DRAWN; // force another invalidation with the new orientation |
| invalidate(false); |
| } |
| } |
| |
| /** |
| * The x location of the point around which the view is {@link #setRotation(float) rotated} |
| * and {@link #setScaleX(float) scaled}. |
| * |
| * @see #getRotation() |
| * @see #getScaleX() |
| * @see #getScaleY() |
| * @see #getPivotY() |
| * @return The x location of the pivot point. |
| */ |
| public float getPivotX() { |
| return mPivotX; |
| } |
| |
| /** |
| * Sets the x location of the point around which the view is |
| * {@link #setRotation(float) rotated} and {@link #setScaleX(float) scaled}. |
| * By default, the pivot point is centered on the object. |
| * Setting this property disables this behavior and causes the view to use only the |
| * explicitly set pivotX and pivotY values. |
| * |
| * @param pivotX The x location of the pivot point. |
| * @see #getRotation() |
| * @see #getScaleX() |
| * @see #getScaleY() |
| * @see #getPivotY() |
| * |
| * @attr ref android.R.styleable#View_transformPivotX |
| */ |
| public void setPivotX(float pivotX) { |
| mPrivateFlags |= PIVOT_EXPLICITLY_SET; |
| if (mPivotX != pivotX) { |
| invalidateParentCaches(); |
| // Double-invalidation is necessary to capture view's old and new areas |
| invalidate(false); |
| mPivotX = pivotX; |
| mMatrixDirty = true; |
| mPrivateFlags |= DRAWN; // force another invalidation with the new orientation |
| invalidate(false); |
| } |
| } |
| |
| /** |
| * The y location of the point around which the view is {@link #setRotation(float) rotated} |
| * and {@link #setScaleY(float) scaled}. |
| * |
| * @see #getRotation() |
| * @see #getScaleX() |
| * @see #getScaleY() |
| * @see #getPivotY() |
| * @return The y location of the pivot point. |
| */ |
| public float getPivotY() { |
| return mPivotY; |
| } |
| |
| /** |
| * Sets the y location of the point around which the view is {@link #setRotation(float) rotated} |
| * and {@link #setScaleY(float) scaled}. By default, the pivot point is centered on the object. |
| * Setting this property disables this behavior and causes the view to use only the |
| * explicitly set pivotX and pivotY values. |
| * |
| * @param pivotY The y location of the pivot point. |
| * @see #getRotation() |
| * @see #getScaleX() |
| * @see #getScaleY() |
| * @see #getPivotY() |
| * |
| * @attr ref android.R.styleable#View_transformPivotY |
| */ |
| public void setPivotY(float pivotY) { |
| mPrivateFlags |= PIVOT_EXPLICITLY_SET; |
| if (mPivotY != pivotY) { |
| invalidateParentCaches(); |
| // Double-invalidation is necessary to capture view's old and new areas |
| invalidate(false); |
| mPivotY = pivotY; |
| mMatrixDirty = true; |
| mPrivateFlags |= DRAWN; // force another invalidation with the new orientation |
| invalidate(false); |
| } |
| } |
| |
| /** |
| * The opacity of the view. This is a value from 0 to 1, where 0 means the view is |
| * completely transparent and 1 means the view is completely opaque. |
| * |
| * <p>By default this is 1.0f. |
| * @return The opacity of the view. |
| */ |
| public float getAlpha() { |
| return mAlpha; |
| } |
| |
| /** |
| * <p>Sets the opacity of the view. This is a value from 0 to 1, where 0 means the view is |
| * completely transparent and 1 means the view is completely opaque.</p> |
| * |
| * <p>If this view overrides {@link #onSetAlpha(int)} to return true, then this view is |
| * responsible for applying the opacity itself. Otherwise, calling this method is |
| * equivalent to calling {@link #setLayerType(int, android.graphics.Paint)} and |
| * setting a hardware layer.</p> |
| * |
| * @param alpha The opacity of the view. |
| * |
| * @see #setLayerType(int, android.graphics.Paint) |
| * |
| * @attr ref android.R.styleable#View_alpha |
| */ |
| public void setAlpha(float alpha) { |
| mAlpha = alpha; |
| invalidateParentCaches(); |
| if (onSetAlpha((int) (alpha * 255))) { |
| mPrivateFlags |= ALPHA_SET; |
| // subclass is handling alpha - don't optimize rendering cache invalidation |
| invalidate(true); |
| } else { |
| mPrivateFlags &= ~ALPHA_SET; |
| invalidate(false); |
| } |
| } |
| |
| /** |
| * Faster version of setAlpha() which performs the same steps except there are |
| * no calls to invalidate(). The caller of this function should perform proper invalidation |
| * on the parent and this object. The return value indicates whether the subclass handles |
| * alpha (the return value for onSetAlpha()). |
| * |
| * @param alpha The new value for the alpha property |
| * @return true if the View subclass handles alpha (the return value for onSetAlpha()) |
| */ |
| boolean setAlphaNoInvalidation(float alpha) { |
| mAlpha = alpha; |
| boolean subclassHandlesAlpha = onSetAlpha((int) (alpha * 255)); |
| if (subclassHandlesAlpha) { |
| mPrivateFlags |= ALPHA_SET; |
| } else { |
| mPrivateFlags &= ~ALPHA_SET; |
| } |
| return subclassHandlesAlpha; |
| } |
| |
| /** |
| * Top position of this view relative to its parent. |
| * |
| * @return The top of this view, in pixels. |
| */ |
| @ViewDebug.CapturedViewProperty |
| public final int getTop() { |
| return mTop; |
| } |
| |
| /** |
| * Sets the top position of this view relative to its parent. This method is meant to be called |
| * by the layout system and should not generally be called otherwise, because the property |
| * may be changed at any time by the layout. |
| * |
| * @param top The top of this view, in pixels. |
| */ |
| public final void setTop(int top) { |
| if (top != mTop) { |
| updateMatrix(); |
| if (mMatrixIsIdentity) { |
| if (mAttachInfo != null) { |
| int minTop; |
| int yLoc; |
| if (top < mTop) { |
| minTop = top; |
| yLoc = top - mTop; |
| } else { |
| minTop = mTop; |
| yLoc = 0; |
| } |
| invalidate(0, yLoc, mRight - mLeft, mBottom - minTop); |
| } |
| } else { |
| // Double-invalidation is necessary to capture view's old and new areas |
| invalidate(true); |
| } |
| |
| int width = mRight - mLeft; |
| int oldHeight = mBottom - mTop; |
| |
| mTop = top; |
| |
| onSizeChanged(width, mBottom - mTop, width, oldHeight); |
| |
| if (!mMatrixIsIdentity) { |
| if ((mPrivateFlags & PIVOT_EXPLICITLY_SET) == 0) { |
| // A change in dimension means an auto-centered pivot point changes, too |
| mMatrixDirty = true; |
| } |
| mPrivateFlags |= DRAWN; // force another invalidation with the new orientation |
| invalidate(true); |
| } |
| mBackgroundSizeChanged = true; |
| invalidateParentIfNeeded(); |
| } |
| } |
| |
| /** |
| * Bottom position of this view relative to its parent. |
| * |
| * @return The bottom of this view, in pixels. |
| */ |
| @ViewDebug.CapturedViewProperty |
| public final int getBottom() { |
| return mBottom; |
| } |
| |
| /** |
| * True if this view has changed since the last time being drawn. |
| * |
| * @return The dirty state of this view. |
| */ |
| public boolean isDirty() { |
| return (mPrivateFlags & DIRTY_MASK) != 0; |
| } |
| |
| /** |
| * Sets the bottom position of this view relative to its parent. This method is meant to be |
| * called by the layout system and should not generally be called otherwise, because the |
| * property may be changed at any time by the layout. |
| * |
| * @param bottom The bottom of this view, in pixels. |
| */ |
| public final void setBottom(int bottom) { |
| if (bottom != mBottom) { |
| updateMatrix(); |
| if (mMatrixIsIdentity) { |
| if (mAttachInfo != null) { |
| int maxBottom; |
| if (bottom < mBottom) { |
| maxBottom = mBottom; |
| } else { |
| maxBottom = bottom; |
| } |
| invalidate(0, 0, mRight - mLeft, maxBottom - mTop); |
| } |
| } else { |
| // Double-invalidation is necessary to capture view's old and new areas |
| invalidate(true); |
| } |
| |
| int width = mRight - mLeft; |
| int oldHeight = mBottom - mTop; |
| |
| mBottom = bottom; |
| |
| onSizeChanged(width, mBottom - mTop, width, oldHeight); |
| |
| if (!mMatrixIsIdentity) { |
| if ((mPrivateFlags & PIVOT_EXPLICITLY_SET) == 0) { |
| // A change in dimension means an auto-centered pivot point changes, too |
| mMatrixDirty = true; |
| } |
| mPrivateFlags |= DRAWN; // force another invalidation with the new orientation |
| invalidate(true); |
| } |
| mBackgroundSizeChanged = true; |
| invalidateParentIfNeeded(); |
| } |
| } |
| |
| /** |
| * Left position of this view relative to its parent. |
| * |
| * @return The left edge of this view, in pixels. |
| */ |
| @ViewDebug.CapturedViewProperty |
| public final int getLeft() { |
| return mLeft; |
| } |
| |
| /** |
| * Sets the left position of this view relative to its parent. This method is meant to be called |
| * by the layout system and should not generally be called otherwise, because the property |
| * may be changed at any time by the layout. |
| * |
| * @param left The bottom of this view, in pixels. |
| */ |
| public final void setLeft(int left) { |
| if (left != mLeft) { |
| updateMatrix(); |
| if (mMatrixIsIdentity) { |
| if (mAttachInfo != null) { |
| int minLeft; |
| int xLoc; |
| if (left < mLeft) { |
| minLeft = left; |
| xLoc = left - mLeft; |
| } else { |
| minLeft = mLeft; |
| xLoc = 0; |
| } |
| invalidate(xLoc, 0, mRight - minLeft, mBottom - mTop); |
| } |
| } else { |
| // Double-invalidation is necessary to capture view's old and new areas |
| invalidate(true); |
| } |
| |
| int oldWidth = mRight - mLeft; |
| int height = mBottom - mTop; |
| |
| mLeft = left; |
| |
| onSizeChanged(mRight - mLeft, height, oldWidth, height); |
| |
| if (!mMatrixIsIdentity) { |
| if ((mPrivateFlags & PIVOT_EXPLICITLY_SET) == 0) { |
| // A change in dimension means an auto-centered pivot point changes, too |
| mMatrixDirty = true; |
| } |
| mPrivateFlags |= DRAWN; // force another invalidation with the new orientation |
| invalidate(true); |
| } |
| mBackgroundSizeChanged = true; |
| invalidateParentIfNeeded(); |
| } |
| } |
| |
| /** |
| * Right position of this view relative to its parent. |
| * |
| * @return The right edge of this view, in pixels. |
| */ |
| @ViewDebug.CapturedViewProperty |
| public final int getRight() { |
| return mRight; |
| } |
| |
| /** |
| * Sets the right position of this view relative to its parent. This method is meant to be called |
| * by the layout system and should not generally be called otherwise, because the property |
| * may be changed at any time by the layout. |
| * |
| * @param right The bottom of this view, in pixels. |
| */ |
| public final void setRight(int right) { |
| if (right != mRight) { |
| updateMatrix(); |
| if (mMatrixIsIdentity) { |
| if (mAttachInfo != null) { |
| int maxRight; |
| if (right < mRight) { |
| maxRight = mRight; |
| } else { |
| maxRight = right; |
| } |
| invalidate(0, 0, maxRight - mLeft, mBottom - mTop); |
| } |
| } else { |
| // Double-invalidation is necessary to capture view's old and new areas |
| invalidate(true); |
| } |
| |
| int oldWidth = mRight - mLeft; |
| int height = mBottom - mTop; |
| |
| mRight = right; |
| |
| onSizeChanged(mRight - mLeft, height, oldWidth, height); |
| |
| if (!mMatrixIsIdentity) { |
| if ((mPrivateFlags & PIVOT_EXPLICITLY_SET) == 0) { |
| // A change in dimension means an auto-centered pivot point changes, too |
| mMatrixDirty = true; |
| } |
| mPrivateFlags |= DRAWN; // force another invalidation with the new orientation |
| invalidate(true); |
| } |
| mBackgroundSizeChanged = true; |
| invalidateParentIfNeeded(); |
| } |
| } |
| |
| /** |
| * The visual x position of this view, in pixels. This is equivalent to the |
| * {@link #setTranslationX(float) translationX} property plus the current |
| * {@link #getLeft() left} property. |
| * |
| * @return The visual x position of this view, in pixels. |
| */ |
| public float getX() { |
| return mLeft + mTranslationX; |
| } |
| |
| /** |
| * Sets the visual x position of this view, in pixels. This is equivalent to setting the |
| * {@link #setTranslationX(float) translationX} property to be the difference between |
| * the x value passed in and the current {@link #getLeft() left} property. |
| * |
| * @param x The visual x position of this view, in pixels. |
| */ |
| public void setX(float x) { |
| setTranslationX(x - mLeft); |
| } |
| |
| /** |
| * The visual y position of this view, in pixels. This is equivalent to the |
| * {@link #setTranslationY(float) translationY} property plus the current |
| * {@link #getTop() top} property. |
| * |
| * @return The visual y position of this view, in pixels. |
| */ |
| public float getY() { |
| return mTop + mTranslationY; |
| } |
| |
| /** |
| * Sets the visual y position of this view, in pixels. This is equivalent to setting the |
| * {@link #setTranslationY(float) translationY} property to be the difference between |
| * the y value passed in and the current {@link #getTop() top} property. |
| * |
| * @param y The visual y position of this view, in pixels. |
| */ |
| public void setY(float y) { |
| setTranslationY(y - mTop); |
| } |
| |
| |
| /** |
| * The horizontal location of this view relative to its {@link #getLeft() left} position. |
| * This position is post-layout, in addition to wherever the object's |
| * layout placed it. |
| * |
| * @return The horizontal position of this view relative to its left position, in pixels. |
| */ |
| public float getTranslationX() { |
| return mTranslationX; |
| } |
| |
| /** |
| * Sets the horizontal location of this view relative to its {@link #getLeft() left} position. |
| * This effectively positions the object post-layout, in addition to wherever the object's |
| * layout placed it. |
| * |
| * @param translationX The horizontal position of this view relative to its left position, |
| * in pixels. |
| * |
| * @attr ref android.R.styleable#View_translationX |
| */ |
| public void setTranslationX(float translationX) { |
| if (mTranslationX != translationX) { |
| invalidateParentCaches(); |
| // Double-invalidation is necessary to capture view's old and new areas |
| invalidate(false); |
| mTranslationX = translationX; |
| mMatrixDirty = true; |
| mPrivateFlags |= DRAWN; // force another invalidation with the new orientation |
| invalidate(false); |
| } |
| } |
| |
| /** |
| * The horizontal location of this view relative to its {@link #getTop() top} position. |
| * This position is post-layout, in addition to wherever the object's |
| * layout placed it. |
| * |
| * @return The vertical position of this view relative to its top position, |
| * in pixels. |
| */ |
| public float getTranslationY() { |
| return mTranslationY; |
| } |
| |
| /** |
| * Sets the vertical location of this view relative to its {@link #getTop() top} position. |
| * This effectively positions the object post-layout, in addition to wherever the object's |
| * layout placed it. |
| * |
| * @param translationY The vertical position of this view relative to its top position, |
| * in pixels. |
| * |
| * @attr ref android.R.styleable#View_translationY |
| */ |
| public void setTranslationY(float translationY) { |
| if (mTranslationY != translationY) { |
| invalidateParentCaches(); |
| // Double-invalidation is necessary to capture view's old and new areas |
| invalidate(false); |
| mTranslationY = translationY; |
| mMatrixDirty = true; |
| mPrivateFlags |= DRAWN; // force another invalidation with the new orientation |
| invalidate(false); |
| } |
| } |
| |
| /** |
| * @hide |
| */ |
| public void setFastTranslationX(float x) { |
| mTranslationX = x; |
| mMatrixDirty = true; |
| } |
| |
| /** |
| * @hide |
| */ |
| public void setFastTranslationY(float y) { |
| mTranslationY = y; |
| mMatrixDirty = true; |
| } |
| |
| /** |
| * @hide |
| */ |
| public void setFastX(float x) { |
| mTranslationX = x - mLeft; |
| mMatrixDirty = true; |
| } |
| |
| /** |
| * @hide |
| */ |
| public void setFastY(float y) { |
| mTranslationY = y - mTop; |
| mMatrixDirty = true; |
| } |
| |
| /** |
| * @hide |
| */ |
| public void setFastScaleX(float x) { |
| mScaleX = x; |
| mMatrixDirty = true; |
| } |
| |
| /** |
| * @hide |
| */ |
| public void setFastScaleY(float y) { |
| mScaleY = y; |
| mMatrixDirty = true; |
| } |
| |
| /** |
| * @hide |
| */ |
| public void setFastAlpha(float alpha) { |
| mAlpha = alpha; |
| } |
| |
| /** |
| * @hide |
| */ |
| public void setFastRotationY(float y) { |
| mRotationY = y; |
| mMatrixDirty = true; |
| } |
| |
| /** |
| * Hit rectangle in parent's coordinates |
| * |
| * @param outRect The hit rectangle of the view. |
| */ |
| public void getHitRect(Rect outRect) { |
| updateMatrix(); |
| if (mMatrixIsIdentity || mAttachInfo == null) { |
| outRect.set(mLeft, mTop, mRight, mBottom); |
| } else { |
| final RectF tmpRect = mAttachInfo.mTmpTransformRect; |
| tmpRect.set(-mPivotX, -mPivotY, getWidth() - mPivotX, getHeight() - mPivotY); |
| mMatrix.mapRect(tmpRect); |
| outRect.set((int) tmpRect.left + mLeft, (int) tmpRect.top + mTop, |
| (int) tmpRect.right + mLeft, (int) tmpRect.bottom + mTop); |
| } |
| } |
| |
| /** |
| * Determines whether the given point, in local coordinates is inside the view. |
| */ |
| /*package*/ final boolean pointInView(float localX, float localY) { |
| return localX >= 0 && localX < (mRight - mLeft) |
| && localY >= 0 && localY < (mBottom - mTop); |
| } |
| |
| /** |
| * Utility method to determine whether the given point, in local coordinates, |
| * is inside the view, where the area of the view is expanded by the slop factor. |
| * This method is called while processing touch-move events to determine if the event |
| * is still within the view. |
| */ |
| private boolean pointInView(float localX, float localY, float slop) { |
| return localX >= -slop && localY >= -slop && localX < ((mRight - mLeft) + slop) && |
| localY < ((mBottom - mTop) + slop); |
| } |
| |
| /** |
| * When a view has focus and the user navigates away from it, the next view is searched for |
| * starting from the rectangle filled in by this method. |
| * |
| * By default, the rectange is the {@link #getDrawingRect(android.graphics.Rect)}) |
| * of the view. However, if your view maintains some idea of internal selection, |
| * such as a cursor, or a selected row or column, you should override this method and |
| * fill in a more specific rectangle. |
| * |
| * @param r The rectangle to fill in, in this view's coordinates. |
| */ |
| public void getFocusedRect(Rect r) { |
| getDrawingRect(r); |
| } |
| |
| /** |
| * If some part of this view is not clipped by any of its parents, then |
| * return that area in r in global (root) coordinates. To convert r to local |
| * coordinates, offset it by -globalOffset (e.g. r.offset(-globalOffset.x, |
| * -globalOffset.y)) If the view is completely clipped or translated out, |
| * return false. |
| * |
| * @param r If true is returned, r holds the global coordinates of the |
| * visible portion of this view. |
| * @param globalOffset If true is returned, globalOffset holds the dx,dy |
| * between this view and its root. globalOffet may be null. |
| * @return true if r is non-empty (i.e. part of the view is visible at the |
| * root level. |
| */ |
| public boolean getGlobalVisibleRect(Rect r, Point globalOffset) { |
| int width = mRight - mLeft; |
| int height = mBottom - mTop; |
| if (width > 0 && height > 0) { |
| r.set(0, 0, width, height); |
| if (globalOffset != null) { |
| globalOffset.set(-mScrollX, -mScrollY); |
| } |
| return mParent == null || mParent.getChildVisibleRect(this, r, globalOffset); |
| } |
| return false; |
| } |
| |
| public final boolean getGlobalVisibleRect(Rect r) { |
| return getGlobalVisibleRect(r, null); |
| } |
| |
| public final boolean getLocalVisibleRect(Rect r) { |
| Point offset = new Point(); |
| if (getGlobalVisibleRect(r, offset)) { |
| r.offset(-offset.x, -offset.y); // make r local |
| return true; |
| } |
| return false; |
| } |
| |
| /** |
| * Offset this view's vertical location by the specified number of pixels. |
| * |
| * @param offset the number of pixels to offset the view by |
| */ |
| public void offsetTopAndBottom(int offset) { |
| if (offset != 0) { |
| updateMatrix(); |
| if (mMatrixIsIdentity) { |
| final ViewParent p = mParent; |
| if (p != null && mAttachInfo != null) { |
| final Rect r = mAttachInfo.mTmpInvalRect; |
| int minTop; |
| int maxBottom; |
| int yLoc; |
| if (offset < 0) { |
| minTop = mTop + offset; |
| maxBottom = mBottom; |
| yLoc = offset; |
| } else { |
| minTop = mTop; |
| maxBottom = mBottom + offset; |
| yLoc = 0; |
| } |
| r.set(0, yLoc, mRight - mLeft, maxBottom - minTop); |
| p.invalidateChild(this, r); |
| } |
| } else { |
| invalidate(false); |
| } |
| |
| mTop += offset; |
| mBottom += offset; |
| |
| if (!mMatrixIsIdentity) { |
| mPrivateFlags |= DRAWN; // force another invalidation with the new orientation |
| invalidate(false); |
| } |
| invalidateParentIfNeeded(); |
| } |
| } |
| |
| /** |
| * Offset this view's horizontal location by the specified amount of pixels. |
| * |
| * @param offset the numer of pixels to offset the view by |
| */ |
| public void offsetLeftAndRight(int offset) { |
| if (offset != 0) { |
| updateMatrix(); |
| if (mMatrixIsIdentity) { |
| final ViewParent p = mParent; |
| if (p != null && mAttachInfo != null) { |
| final Rect r = mAttachInfo.mTmpInvalRect; |
| int minLeft; |
| int maxRight; |
| if (offset < 0) { |
| minLeft = mLeft + offset; |
| maxRight = mRight; |
| } else { |
| minLeft = mLeft; |
| maxRight = mRight + offset; |
| } |
| r.set(0, 0, maxRight - minLeft, mBottom - mTop); |
| p.invalidateChild(this, r); |
| } |
| } else { |
| invalidate(false); |
| } |
| |
| mLeft += offset; |
| mRight += offset; |
| |
| if (!mMatrixIsIdentity) { |
| mPrivateFlags |= DRAWN; // force another invalidation with the new orientation |
| invalidate(false); |
| } |
| invalidateParentIfNeeded(); |
| } |
| } |
| |
| /** |
| * Get the LayoutParams associated with this view. All views should have |
| * layout parameters. These supply parameters to the <i>parent</i> of this |
| * view specifying how it should be arranged. There are many subclasses of |
| * ViewGroup.LayoutParams, and these correspond to the different subclasses |
| * of ViewGroup that are responsible for arranging their children. |
| * |
| * This method may return null if this View is not attached to a parent |
| * ViewGroup or {@link #setLayoutParams(android.view.ViewGroup.LayoutParams)} |
| * was not invoked successfully. When a View is attached to a parent |
| * ViewGroup, this method must not return null. |
| * |
| * @return The LayoutParams associated with this view, or null if no |
| * parameters have been set yet |
| */ |
| @ViewDebug.ExportedProperty(deepExport = true, prefix = "layout_") |
| public ViewGroup.LayoutParams getLayoutParams() { |
| return mLayoutParams; |
| } |
| |
| /** |
| * Set the layout parameters associated with this view. These supply |
| * parameters to the <i>parent</i> of this view specifying how it should be |
| * arranged. There are many subclasses of ViewGroup.LayoutParams, and these |
| * correspond to the different subclasses of ViewGroup that are responsible |
| * for arranging their children. |
| * |
| * @param params The layout parameters for this view, cannot be null |
| */ |
| public void setLayoutParams(ViewGroup.LayoutParams params) { |
| if (params == null) { |
| throw new NullPointerException("Layout parameters cannot be null"); |
| } |
| mLayoutParams = params; |
| requestLayout(); |
| } |
| |
| /** |
| * Set the scrolled position of your view. This will cause a call to |
| * {@link #onScrollChanged(int, int, int, int)} and the view will be |
| * invalidated. |
| * @param x the x position to scroll to |
| * @param y the y position to scroll to |
| */ |
| public void scrollTo(int x, int y) { |
| if (mScrollX != x || mScrollY != y) { |
| int oldX = mScrollX; |
| int oldY = mScrollY; |
| mScrollX = x; |
| mScrollY = y; |
| invalidateParentCaches(); |
| onScrollChanged(mScrollX, mScrollY, oldX, oldY); |
| if (!awakenScrollBars()) { |
| invalidate(true); |
| } |
| } |
| } |
| |
| /** |
| * Move the scrolled position of your view. This will cause a call to |
| * {@link #onScrollChanged(int, int, int, int)} and the view will be |
| * invalidated. |
| * @param x the amount of pixels to scroll by horizontally |
| * @param y the amount of pixels to scroll by vertically |
| */ |
| public void scrollBy(int x, int y) { |
| scrollTo(mScrollX + x, mScrollY + y); |
| } |
| |
| /** |
| * <p>Trigger the scrollbars to draw. When invoked this method starts an |
| * animation to fade the scrollbars out after a default delay. If a subclass |
| * provides animated scrolling, the start delay should equal the duration |
| * of the scrolling animation.</p> |
| * |
| * <p>The animation starts only if at least one of the scrollbars is |
| * enabled, as specified by {@link #isHorizontalScrollBarEnabled()} and |
| * {@link #isVerticalScrollBarEnabled()}. When the animation is started, |
| * this method returns true, and false otherwise. If the animation is |
| * started, this method calls {@link #invalidate()}; in that case the |
| * caller should not call {@link #invalidate()}.</p> |
| * |
| * <p>This method should be invoked every time a subclass directly updates |
| * the scroll parameters.</p> |
| * |
| * <p>This method is automatically invoked by {@link #scrollBy(int, int)} |
| * and {@link #scrollTo(int, int)}.</p> |
| * |
| * @return true if the animation is played, false otherwise |
| * |
| * @see #awakenScrollBars(int) |
| * @see #scrollBy(int, int) |
| * @see #scrollTo(int, int) |
| * @see #isHorizontalScrollBarEnabled() |
| * @see #isVerticalScrollBarEnabled() |
| * @see #setHorizontalScrollBarEnabled(boolean) |
| * @see #setVerticalScrollBarEnabled(boolean) |
| */ |
| protected boolean awakenScrollBars() { |
| return mScrollCache != null && |
| awakenScrollBars(mScrollCache.scrollBarDefaultDelayBeforeFade, true); |
| } |
| |
| /** |
| * Trigger the scrollbars to draw. |
| * This method differs from awakenScrollBars() only in its default duration. |
| * initialAwakenScrollBars() will show the scroll bars for longer than |
| * usual to give the user more of a chance to notice them. |
| * |
| * @return true if the animation is played, false otherwise. |
| */ |
| private boolean initialAwakenScrollBars() { |
| return mScrollCache != null && |
| awakenScrollBars(mScrollCache.scrollBarDefaultDelayBeforeFade * 4, true); |
| } |
| |
| /** |
| * <p> |
| * Trigger the scrollbars to draw. When invoked this method starts an |
| * animation to fade the scrollbars out after a fixed delay. If a subclass |
| * provides animated scrolling, the start delay should equal the duration of |
| * the scrolling animation. |
| * </p> |
| * |
| * <p> |
| * The animation starts only if at least one of the scrollbars is enabled, |
| * as specified by {@link #isHorizontalScrollBarEnabled()} and |
| * {@link #isVerticalScrollBarEnabled()}. When the animation is started, |
| * this method returns true, and false otherwise. If the animation is |
| * started, this method calls {@link #invalidate()}; in that case the caller |
| * should not call {@link #invalidate()}. |
| * </p> |
| * |
| * <p> |
| * This method should be invoked everytime a subclass directly updates the |
| * scroll parameters. |
| * </p> |
| * |
| * @param startDelay the delay, in milliseconds, after which the animation |
| * should start; when the delay is 0, the animation starts |
| * immediately |
| * @return true if the animation is played, false otherwise |
| * |
| * @see #scrollBy(int, int) |
| * @see #scrollTo(int, int) |
| * @see #isHorizontalScrollBarEnabled() |
| * @see #isVerticalScrollBarEnabled() |
| * @see #setHorizontalScrollBarEnabled(boolean) |
| * @see #setVerticalScrollBarEnabled(boolean) |
| */ |
| protected boolean awakenScrollBars(int startDelay) { |
| return awakenScrollBars(startDelay, true); |
| } |
| |
| /** |
| * <p> |
| * Trigger the scrollbars to draw. When invoked this method starts an |
| * animation to fade the scrollbars out after a fixed delay. If a subclass |
| * provides animated scrolling, the start delay should equal the duration of |
| * the scrolling animation. |
| * </p> |
| * |
| * <p> |
| * The animation starts only if at least one of the scrollbars is enabled, |
| * as specified by {@link #isHorizontalScrollBarEnabled()} and |
| * {@link #isVerticalScrollBarEnabled()}. When the animation is started, |
| * this method returns true, and false otherwise. If the animation is |
| * started, this method calls {@link #invalidate()} if the invalidate parameter |
| * is set to true; in that case the caller |
| * should not call {@link #invalidate()}. |
| * </p> |
| * |
| * <p> |
| * This method should be invoked everytime a subclass directly updates the |
| * scroll parameters. |
| * </p> |
| * |
| * @param startDelay the delay, in milliseconds, after which the animation |
| * should start; when the delay is 0, the animation starts |
| * immediately |
| * |
| * @param invalidate Wheter this method should call invalidate |
| * |
| * @return true if the animation is played, false otherwise |
| * |
| * @see #scrollBy(int, int) |
| * @see #scrollTo(int, int) |
| * @see #isHorizontalScrollBarEnabled() |
| * @see #isVerticalScrollBarEnabled() |
| * @see #setHorizontalScrollBarEnabled(boolean) |
| * @see #setVerticalScrollBarEnabled(boolean) |
| */ |
| protected boolean awakenScrollBars(int startDelay, boolean invalidate) { |
| final ScrollabilityCache scrollCache = mScrollCache; |
| |
| if (scrollCache == null || !scrollCache.fadeScrollBars) { |
| return false; |
| } |
| |
| if (scrollCache.scrollBar == null) { |
| scrollCache.scrollBar = new ScrollBarDrawable(); |
| } |
| |
| if (isHorizontalScrollBarEnabled() || isVerticalScrollBarEnabled()) { |
| |
| if (invalidate) { |
| // Invalidate to show the scrollbars |
| invalidate(true); |
| } |
| |
| if (scrollCache.state == ScrollabilityCache.OFF) { |
| // FIXME: this is copied from WindowManagerService. |
| // We should get this value from the system when it |
| // is possible to do so. |
| final int KEY_REPEAT_FIRST_DELAY = 750; |
| startDelay = Math.max(KEY_REPEAT_FIRST_DELAY, startDelay); |
| } |
| |
| // Tell mScrollCache when we should start fading. This may |
| // extend the fade start time if one was already scheduled |
| long fadeStartTime = AnimationUtils.currentAnimationTimeMillis() + startDelay; |
| scrollCache.fadeStartTime = fadeStartTime; |
| scrollCache.state = ScrollabilityCache.ON; |
| |
| // Schedule our fader to run, unscheduling any old ones first |
| if (mAttachInfo != null) { |
| mAttachInfo.mHandler.removeCallbacks(scrollCache); |
| mAttachInfo.mHandler.postAtTime(scrollCache, fadeStartTime); |
| } |
| |
| return true; |
| } |
| |
| return false; |
| } |
| |
| /** |
| * Mark the the area defined by dirty as needing to be drawn. If the view is |
| * visible, {@link #onDraw(android.graphics.Canvas)} will be called at some point |
| * in the future. This must be called from a UI thread. To call from a non-UI |
| * thread, call {@link #postInvalidate()}. |
| * |
| * WARNING: This method is destructive to dirty. |
| * @param dirty the rectangle representing the bounds of the dirty region |
| */ |
| public void invalidate(Rect dirty) { |
| if (ViewDebug.TRACE_HIERARCHY) { |
| ViewDebug.trace(this, ViewDebug.HierarchyTraceType.INVALIDATE); |
| } |
| |
| if ((mPrivateFlags & (DRAWN | HAS_BOUNDS)) == (DRAWN | HAS_BOUNDS) || |
| (mPrivateFlags & DRAWING_CACHE_VALID) == DRAWING_CACHE_VALID || |
| (mPrivateFlags & INVALIDATED) != INVALIDATED) { |
| mPrivateFlags &= ~DRAWING_CACHE_VALID; |
| mPrivateFlags |= INVALIDATED; |
| final ViewParent p = mParent; |
| final AttachInfo ai = mAttachInfo; |
| //noinspection PointlessBooleanExpression,ConstantConditions |
| if (!HardwareRenderer.RENDER_DIRTY_REGIONS) { |
| if (p != null && ai != null && ai.mHardwareAccelerated) { |
| // fast-track for GL-enabled applications; just invalidate the whole hierarchy |
| // with a null dirty rect, which tells the ViewAncestor to redraw everything |
| p.invalidateChild(this, null); |
| return; |
| } |
| } |
| if (p != null && ai != null) { |
| final int scrollX = mScrollX; |
| final int scrollY = mScrollY; |
| final Rect r = ai.mTmpInvalRect; |
| r.set(dirty.left - scrollX, dirty.top - scrollY, |
| dirty.right - scrollX, dirty.bottom - scrollY); |
| mParent.invalidateChild(this, r); |
| } |
| } |
| } |
| |
| /** |
| * Mark the the area defined by the rect (l,t,r,b) as needing to be drawn. |
| * The coordinates of the dirty rect are relative to the view. |
| * If the view is visible, {@link #onDraw(android.graphics.Canvas)} |
| * will be called at some point in the future. This must be called from |
| * a UI thread. To call from a non-UI thread, call {@link #postInvalidate()}. |
| * @param l the left position of the dirty region |
| * @param t the top position of the dirty region |
| * @param r the right position of the dirty region |
| * @param b the bottom position of the dirty region |
| */ |
| public void invalidate(int l, int t, int r, int b) { |
| if (ViewDebug.TRACE_HIERARCHY) { |
| ViewDebug.trace(this, ViewDebug.HierarchyTraceType.INVALIDATE); |
| } |
| |
| if ((mPrivateFlags & (DRAWN | HAS_BOUNDS)) == (DRAWN | HAS_BOUNDS) || |
| (mPrivateFlags & DRAWING_CACHE_VALID) == DRAWING_CACHE_VALID || |
| (mPrivateFlags & INVALIDATED) != INVALIDATED) { |
| mPrivateFlags &= ~DRAWING_CACHE_VALID; |
| mPrivateFlags |= INVALIDATED; |
| final ViewParent p = mParent; |
| final AttachInfo ai = mAttachInfo; |
| //noinspection PointlessBooleanExpression,ConstantConditions |
| if (!HardwareRenderer.RENDER_DIRTY_REGIONS) { |
| if (p != null && ai != null && ai.mHardwareAccelerated) { |
| // fast-track for GL-enabled applications; just invalidate the whole hierarchy |
| // with a null dirty rect, which tells the ViewAncestor to redraw everything |
| p.invalidateChild(this, null); |
| return; |
| } |
| } |
| if (p != null && ai != null && l < r && t < b) { |
| final int scrollX = mScrollX; |
| final int scrollY = mScrollY; |
| final Rect tmpr = ai.mTmpInvalRect; |
| tmpr.set(l - scrollX, t - scrollY, r - scrollX, b - scrollY); |
| p.invalidateChild(this, tmpr); |
| } |
| } |
| } |
| |
| /** |
| * Invalidate the whole view. If the view is visible, |
| * {@link #onDraw(android.graphics.Canvas)} will be called at some point in |
| * the future. This must be called from a UI thread. To call from a non-UI thread, |
| * call {@link #postInvalidate()}. |
| */ |
| public void invalidate() { |
| invalidate(true); |
| } |
| |
| /** |
| * This is where the invalidate() work actually happens. A full invalidate() |
| * causes the drawing cache to be invalidated, but this function can be called with |
| * invalidateCache set to false to skip that invalidation step for cases that do not |
| * need it (for example, a component that remains at the same dimensions with the same |
| * content). |
| * |
| * @param invalidateCache Whether the drawing cache for this view should be invalidated as |
| * well. This is usually true for a full invalidate, but may be set to false if the |
| * View's contents or dimensions have not changed. |
| */ |
| void invalidate(boolean invalidateCache) { |
| if (ViewDebug.TRACE_HIERARCHY) { |
| ViewDebug.trace(this, ViewDebug.HierarchyTraceType.INVALIDATE); |
| } |
| |
| if ((mPrivateFlags & (DRAWN | HAS_BOUNDS)) == (DRAWN | HAS_BOUNDS) || |
| (invalidateCache && (mPrivateFlags & DRAWING_CACHE_VALID) == DRAWING_CACHE_VALID) || |
| (mPrivateFlags & INVALIDATED) != INVALIDATED || isOpaque() != mLastIsOpaque) { |
| mLastIsOpaque = isOpaque(); |
| mPrivateFlags &= ~DRAWN; |
| if (invalidateCache) { |
| mPrivateFlags |= INVALIDATED; |
| mPrivateFlags &= ~DRAWING_CACHE_VALID; |
| } |
| final AttachInfo ai = mAttachInfo; |
| final ViewParent p = mParent; |
| //noinspection PointlessBooleanExpression,ConstantConditions |
| if (!HardwareRenderer.RENDER_DIRTY_REGIONS) { |
| if (p != null && ai != null && ai.mHardwareAccelerated) { |
| // fast-track for GL-enabled applications; just invalidate the whole hierarchy |
| // with a null dirty rect, which tells the ViewAncestor to redraw everything |
| p.invalidateChild(this, null); |
| return; |
| } |
| } |
| |
| if (p != null && ai != null) { |
| final Rect r = ai.mTmpInvalRect; |
| r.set(0, 0, mRight - mLeft, mBottom - mTop); |
| // Don't call invalidate -- we don't want to internally scroll |
| // our own bounds |
| p.invalidateChild(this, r); |
| } |
| } |
| } |
| |
| /** |
| * @hide |
| */ |
| public void fastInvalidate() { |
| if ((mPrivateFlags & (DRAWN | HAS_BOUNDS)) == (DRAWN | HAS_BOUNDS) || |
| (mPrivateFlags & DRAWING_CACHE_VALID) == DRAWING_CACHE_VALID || |
| (mPrivateFlags & INVALIDATED) != INVALIDATED) { |
| if (mParent instanceof View) { |
| ((View) mParent).mPrivateFlags |= INVALIDATED; |
| } |
| mPrivateFlags &= ~DRAWN; |
| mPrivateFlags |= INVALIDATED; |
| mPrivateFlags &= ~DRAWING_CACHE_VALID; |
| if (mParent != null && mAttachInfo != null) { |
| if (mAttachInfo.mHardwareAccelerated) { |
| mParent.invalidateChild(this, null); |
| } else { |
| final Rect r = mAttachInfo.mTmpInvalRect; |
| r.set(0, 0, mRight - mLeft, mBottom - mTop); |
| // Don't call invalidate -- we don't want to internally scroll |
| // our own bounds |
| mParent.invalidateChild(this, r); |
| } |
| } |
| } |
| } |
| |
| /** |
| * Used to indicate that the parent of this view should clear its caches. This functionality |
| * is used to force the parent to rebuild its display list (when hardware-accelerated), |
| * which is necessary when various parent-managed properties of the view change, such as |
| * alpha, translationX/Y, scrollX/Y, scaleX/Y, and rotation/X/Y. This method only |
| * clears the parent caches and does not causes an invalidate event. |
| * |
| * @hide |
| */ |
| protected void invalidateParentCaches() { |
| if (mParent instanceof View) { |
| ((View) mParent).mPrivateFlags |= INVALIDATED; |
| } |
| } |
| |
| /** |
| * Used to indicate that the parent of this view should be invalidated. This functionality |
| * is used to force the parent to rebuild its display list (when hardware-accelerated), |
| * which is necessary when various parent-managed properties of the view change, such as |
| * alpha, translationX/Y, scrollX/Y, scaleX/Y, and rotation/X/Y. This method will propagate |
| * an invalidation event to the parent. |
| * |
| * @hide |
| */ |
| protected void invalidateParentIfNeeded() { |
| if (isHardwareAccelerated() && mParent instanceof View) { |
| ((View) mParent).invalidate(true); |
| } |
| } |
| |
| /** |
| * Indicates whether this View is opaque. An opaque View guarantees that it will |
| * draw all the pixels overlapping its bounds using a fully opaque color. |
| * |
| * Subclasses of View should override this method whenever possible to indicate |
| * whether an instance is opaque. Opaque Views are treated in a special way by |
| * the View hierarchy, possibly allowing it to perform optimizations during |
| * invalidate/draw passes. |
| * |
| * @return True if this View is guaranteed to be fully opaque, false otherwise. |
| */ |
| @ViewDebug.ExportedProperty(category = "drawing") |
| public boolean isOpaque() { |
| return (mPrivateFlags & OPAQUE_MASK) == OPAQUE_MASK && |
| (mAlpha >= 1.0f - ViewConfiguration.ALPHA_THRESHOLD); |
| } |
| |
| /** |
| * @hide |
| */ |
| protected void computeOpaqueFlags() { |
| // Opaque if: |
| // - Has a background |
| // - Background is opaque |
| // - Doesn't have scrollbars or scrollbars are inside overlay |
| |
| if (mBGDrawable != null && mBGDrawable.getOpacity() == PixelFormat.OPAQUE) { |
| mPrivateFlags |= OPAQUE_BACKGROUND; |
| } else { |
| mPrivateFlags &= ~OPAQUE_BACKGROUND; |
| } |
| |
| final int flags = mViewFlags; |
| if (((flags & SCROLLBARS_VERTICAL) == 0 && (flags & SCROLLBARS_HORIZONTAL) == 0) || |
| (flags & SCROLLBARS_STYLE_MASK) == SCROLLBARS_INSIDE_OVERLAY) { |
| mPrivateFlags |= OPAQUE_SCROLLBARS; |
| } else { |
| mPrivateFlags &= ~OPAQUE_SCROLLBARS; |
| } |
| } |
| |
| /** |
| * @hide |
| */ |
| protected boolean hasOpaqueScrollbars() { |
| return (mPrivateFlags & OPAQUE_SCROLLBARS) == OPAQUE_SCROLLBARS; |
| } |
| |
| /** |
| * @return A handler associated with the thread running the View. This |
| * handler can be used to pump events in the UI events queue. |
| */ |
| public Handler getHandler() { |
| if (mAttachInfo != null) { |
| return mAttachInfo.mHandler; |
| } |
| return null; |
| } |
| |
| /** |
| * Causes the Runnable to be added to the message queue. |
| * The runnable will be run on the user interface thread. |
| * |
| * @param action The Runnable that will be executed. |
| * |
| * @return Returns true if the Runnable was successfully placed in to the |
| * message queue. Returns false on failure, usually because the |
| * looper processing the message queue is exiting. |
| */ |
| public boolean post(Runnable action) { |
| Handler handler; |
| AttachInfo attachInfo = mAttachInfo; |
| if (attachInfo != null) { |
| handler = attachInfo.mHandler; |
| } else { |
| // Assume that post will succeed later |
| ViewAncestor.getRunQueue().post(action); |
| return true; |
| } |
| |
| return handler.post(action); |
| } |
| |
| /** |
| * Causes the Runnable to be added to the message queue, to be run |
| * after the specified amount of time elapses. |
| * The runnable will be run on the user interface thread. |
| * |
| * @param action The Runnable that will be executed. |
| * @param delayMillis The delay (in milliseconds) until the Runnable |
| * will be executed. |
| * |
| * @return true if the Runnable was successfully placed in to the |
| * message queue. Returns false on failure, usually because the |
| * looper processing the message queue is exiting. Note that a |
| * result of true does not mean the Runnable will be processed -- |
| * if the looper is quit before the delivery time of the message |
| * occurs then the message will be dropped. |
| */ |
| public boolean postDelayed(Runnable action, long delayMillis) { |
| Handler handler; |
| AttachInfo attachInfo = mAttachInfo; |
| if (attachInfo != null) { |
| handler = attachInfo.mHandler; |
| } else { |
| // Assume that post will succeed later |
| ViewAncestor.getRunQueue().postDelayed(action, delayMillis); |
| return true; |
| } |
| |
| return handler.postDelayed(action, delayMillis); |
| } |
| |
| /** |
| * Removes the specified Runnable from the message queue. |
| * |
| * @param action The Runnable to remove from the message handling queue |
| * |
| * @return true if this view could ask the Handler to remove the Runnable, |
| * false otherwise. When the returned value is true, the Runnable |
| * may or may not have been actually removed from the message queue |
| * (for instance, if the Runnable was not in the queue already.) |
| */ |
| public boolean removeCallbacks(Runnable action) { |
| Handler handler; |
| AttachInfo attachInfo = mAttachInfo; |
| if (attachInfo != null) { |
| handler = attachInfo.mHandler; |
| } else { |
| // Assume that post will succeed later |
| ViewAncestor.getRunQueue().removeCallbacks(action); |
| return true; |
| } |
| |
| handler.removeCallbacks(action); |
| return true; |
| } |
| |
| /** |
| * Cause an invalidate to happen on a subsequent cycle through the event loop. |
| * Use this to invalidate the View from a non-UI thread. |
| * |
| * @see #invalidate() |
| */ |
| public void postInvalidate() { |
| postInvalidateDelayed(0); |
| } |
| |
| /** |
| * Cause an invalidate of the specified area to happen on a subsequent cycle |
| * through the event loop. Use this to invalidate the View from a non-UI thread. |
| * |
| * @param left The left coordinate of the rectangle to invalidate. |
| * @param top The top coordinate of the rectangle to invalidate. |
| * @param right The right coordinate of the rectangle to invalidate. |
| * @param bottom The bottom coordinate of the rectangle to invalidate. |
| * |
| * @see #invalidate(int, int, int, int) |
| * @see #invalidate(Rect) |
| */ |
| public void postInvalidate(int left, int top, int right, int bottom) { |
| postInvalidateDelayed(0, left, top, right, bottom); |
| } |
| |
| /** |
| * Cause an invalidate to happen on a subsequent cycle through the event |
| * loop. Waits for the specified amount of time. |
| * |
| * @param delayMilliseconds the duration in milliseconds to delay the |
| * invalidation by |
| */ |
| public void postInvalidateDelayed(long delayMilliseconds) { |
| // We try only with the AttachInfo because there's no point in invalidating |
| // if we are not attached to our window |
| AttachInfo attachInfo = mAttachInfo; |
| if (attachInfo != null) { |
| Message msg = Message.obtain(); |
| msg.what = AttachInfo.INVALIDATE_MSG; |
| msg.obj = this; |
| attachInfo.mHandler.sendMessageDelayed(msg, delayMilliseconds); |
| } |
| } |
| |
| /** |
| * Cause an invalidate of the specified area to happen on a subsequent cycle |
| * through the event loop. Waits for the specified amount of time. |
| * |
| * @param delayMilliseconds the duration in milliseconds to delay the |
| * invalidation by |
| * @param left The left coordinate of the rectangle to invalidate. |
| * @param top The top coordinate of the rectangle to invalidate. |
| * @param right The right coordinate of the rectangle to invalidate. |
| * @param bottom The bottom coordinate of the rectangle to invalidate. |
| */ |
| public void postInvalidateDelayed(long delayMilliseconds, int left, int top, |
| int right, int bottom) { |
| |
| // We try only with the AttachInfo because there's no point in invalidating |
| // if we are not attached to our window |
| AttachInfo attachInfo = mAttachInfo; |
| if (attachInfo != null) { |
| final AttachInfo.InvalidateInfo info = AttachInfo.InvalidateInfo.acquire(); |
| info.target = this; |
| info.left = left; |
| info.top = top; |
| info.right = right; |
| info.bottom = bottom; |
| |
| final Message msg = Message.obtain(); |
| msg.what = AttachInfo.INVALIDATE_RECT_MSG; |
| msg.obj = info; |
| attachInfo.mHandler.sendMessageDelayed(msg, delayMilliseconds); |
| } |
| } |
| |
| /** |
| * Post a callback to send a {@link AccessibilityEvent#TYPE_VIEW_SCROLLED} event. |
| * This event is sent at most once every |
| * {@link ViewConfiguration#getSendRecurringAccessibilityEventsInterval()}. |
| */ |
| private void postSendViewScrolledAccessibilityEventCallback() { |
| if (mSendViewScrolledAccessibilityEvent == null) { |
| mSendViewScrolledAccessibilityEvent = new SendViewScrolledAccessibilityEvent(); |
| } |
| if (!mSendViewScrolledAccessibilityEvent.mIsPending) { |
| mSendViewScrolledAccessibilityEvent.mIsPending = true; |
| postDelayed(mSendViewScrolledAccessibilityEvent, |
| ViewConfiguration.getSendRecurringAccessibilityEventsInterval()); |
| } |
| } |
| |
| /** |
| * Called by a parent to request that a child update its values for mScrollX |
| * and mScrollY if necessary. This will typically be done if the child is |
| * animating a scroll using a {@link android.widget.Scroller Scroller} |
| * object. |
| */ |
| public void computeScroll() { |
| } |
| |
| /** |
| * <p>Indicate whether the horizontal edges are faded when the view is |
| * scrolled horizontally.</p> |
| * |
| * @return true if the horizontal edges should are faded on scroll, false |
| * otherwise |
| * |
| * @see #setHorizontalFadingEdgeEnabled(boolean) |
| * @attr ref android.R.styleable#View_fadingEdge |
| */ |
| public boolean isHorizontalFadingEdgeEnabled() { |
| return (mViewFlags & FADING_EDGE_HORIZONTAL) == FADING_EDGE_HORIZONTAL; |
| } |
| |
| /** |
| * <p>Define whether the horizontal edges should be faded when this view |
| * is scrolled horizontally.</p> |
| * |
| * @param horizontalFadingEdgeEnabled true if the horizontal edges should |
| * be faded when the view is scrolled |
| * horizontally |
| * |
| * @see #isHorizontalFadingEdgeEnabled() |
| * @attr ref android.R.styleable#View_fadingEdge |
| */ |
| public void setHorizontalFadingEdgeEnabled(boolean horizontalFadingEdgeEnabled) { |
| if (isHorizontalFadingEdgeEnabled() != horizontalFadingEdgeEnabled) { |
| if (horizontalFadingEdgeEnabled) { |
| initScrollCache(); |
| } |
| |
| mViewFlags ^= FADING_EDGE_HORIZONTAL; |
| } |
| } |
| |
| /** |
| * <p>Indicate whether the vertical edges are faded when the view is |
| * scrolled horizontally.</p> |
| * |
| * @return true if the vertical edges should are faded on scroll, false |
| * otherwise |
| * |
| * @see #setVerticalFadingEdgeEnabled(boolean) |
| * @attr ref android.R.styleable#View_fadingEdge |
| */ |
| public boolean isVerticalFadingEdgeEnabled() { |
| return (mViewFlags & FADING_EDGE_VERTICAL) == FADING_EDGE_VERTICAL; |
| } |
| |
| /** |
| * <p>Define whether the vertical edges should be faded when this view |
| * is scrolled vertically.</p> |
| * |
| * @param verticalFadingEdgeEnabled true if the vertical edges should |
| * be faded when the view is scrolled |
| * vertically |
| * |
| * @see #isVerticalFadingEdgeEnabled() |
| * @attr ref android.R.styleable#View_fadingEdge |
| */ |
| public void setVerticalFadingEdgeEnabled(boolean verticalFadingEdgeEnabled) { |
| if (isVerticalFadingEdgeEnabled() != verticalFadingEdgeEnabled) { |
| if (verticalFadingEdgeEnabled) { |
| initScrollCache(); |
| } |
| |
| mViewFlags ^= FADING_EDGE_VERTICAL; |
| } |
| } |
| |
| /** |
| * Returns the strength, or intensity, of the top faded edge. The strength is |
| * a value between 0.0 (no fade) and 1.0 (full fade). The default implementation |
| * returns 0.0 or 1.0 but no value in between. |
| * |
| * Subclasses should override this method to provide a smoother fade transition |
| * when scrolling occurs. |
| * |
| * @return the intensity of the top fade as a float between 0.0f and 1.0f |
| */ |
| protected float getTopFadingEdgeStrength() { |
| return computeVerticalScrollOffset() > 0 ? 1.0f : 0.0f; |
| } |
| |
| /** |
| * Returns the strength, or intensity, of the bottom faded edge. The strength is |
| * a value between 0.0 (no fade) and 1.0 (full fade). The default implementation |
| * returns 0.0 or 1.0 but no value in between. |
| * |
| * Subclasses should override this method to provide a smoother fade transition |
| * when scrolling occurs. |
| * |
| * @return the intensity of the bottom fade as a float between 0.0f and 1.0f |
| */ |
| protected float getBottomFadingEdgeStrength() { |
| return computeVerticalScrollOffset() + computeVerticalScrollExtent() < |
| computeVerticalScrollRange() ? 1.0f : 0.0f; |
| } |
| |
| /** |
| * Returns the strength, or intensity, of the left faded edge. The strength is |
| * a value between 0.0 (no fade) and 1.0 (full fade). The default implementation |
| * returns 0.0 or 1.0 but no value in between. |
| * |
| * Subclasses should override this method to provide a smoother fade transition |
| * when scrolling occurs. |
| * |
| * @return the intensity of the left fade as a float between 0.0f and 1.0f |
| */ |
| protected float getLeftFadingEdgeStrength() { |
| return computeHorizontalScrollOffset() > 0 ? 1.0f : 0.0f; |
| } |
| |
| /** |
| * Returns the strength, or intensity, of the right faded edge. The strength is |
| * a value between 0.0 (no fade) and 1.0 (full fade). The default implementation |
| * returns 0.0 or 1.0 but no value in between. |
| * |
| * Subclasses should override this method to provide a smoother fade transition |
| * when scrolling occurs. |
| * |
| * @return the intensity of the right fade as a float between 0.0f and 1.0f |
| */ |
| protected float getRightFadingEdgeStrength() { |
| return computeHorizontalScrollOffset() + computeHorizontalScrollExtent() < |
| computeHorizontalScrollRange() ? 1.0f : 0.0f; |
| } |
| |
| /** |
| * <p>Indicate whether the horizontal scrollbar should be drawn or not. The |
| * scrollbar is not drawn by default.</p> |
| * |
| * @return true if the horizontal scrollbar should be painted, false |
| * otherwise |
| * |
| * @see #setHorizontalScrollBarEnabled(boolean) |
| */ |
| public boolean isHorizontalScrollBarEnabled() { |
| return (mViewFlags & SCROLLBARS_HORIZONTAL) == SCROLLBARS_HORIZONTAL; |
| } |
| |
| /** |
| * <p>Define whether the horizontal scrollbar should be drawn or not. The |
| * scrollbar is not drawn by default.</p> |
| * |
| * @param horizontalScrollBarEnabled true if the horizontal scrollbar should |
| * be painted |
| * |
| * @see #isHorizontalScrollBarEnabled() |
| */ |
| public void setHorizontalScrollBarEnabled(boolean horizontalScrollBarEnabled) { |
| if (isHorizontalScrollBarEnabled() != horizontalScrollBarEnabled) { |
| mViewFlags ^= SCROLLBARS_HORIZONTAL; |
| computeOpaqueFlags(); |
| resolvePadding(); |
| } |
| } |
| |
| /** |
| * <p>Indicate whether the vertical scrollbar should be drawn or not. The |
| * scrollbar is not drawn by default.</p> |
| * |
| * @return true if the vertical scrollbar should be painted, false |
| * otherwise |
| * |
| * @see #setVerticalScrollBarEnabled(boolean) |
| */ |
| public boolean isVerticalScrollBarEnabled() { |
| return (mViewFlags & SCROLLBARS_VERTICAL) == SCROLLBARS_VERTICAL; |
| } |
| |
| /** |
| * <p>Define whether the vertical scrollbar should be drawn or not. The |
| * scrollbar is not drawn by default.</p> |
| * |
| * @param verticalScrollBarEnabled true if the vertical scrollbar should |
| * be painted |
| * |
| * @see #isVerticalScrollBarEnabled() |
| */ |
| public void setVerticalScrollBarEnabled(boolean verticalScrollBarEnabled) { |
| if (isVerticalScrollBarEnabled() != verticalScrollBarEnabled) { |
| mViewFlags ^= SCROLLBARS_VERTICAL; |
| computeOpaqueFlags(); |
| resolvePadding(); |
| } |
| } |
| |
| /** |
| * @hide |
| */ |
| protected void recomputePadding() { |
| setPadding(mUserPaddingLeft, mPaddingTop, mUserPaddingRight, mUserPaddingBottom); |
| } |
| |
| /** |
| * Define whether scrollbars will fade when the view is not scrolling. |
| * |
| * @param fadeScrollbars wheter to enable fading |
| * |
| */ |
| public void setScrollbarFadingEnabled(boolean fadeScrollbars) { |
| initScrollCache(); |
| final ScrollabilityCache scrollabilityCache = mScrollCache; |
| scrollabilityCache.fadeScrollBars = fadeScrollbars; |
| if (fadeScrollbars) { |
| scrollabilityCache.state = ScrollabilityCache.OFF; |
| } else { |
| scrollabilityCache.state = ScrollabilityCache.ON; |
| } |
| } |
| |
| /** |
| * |
| * Returns true if scrollbars will fade when this view is not scrolling |
| * |
| * @return true if scrollbar fading is enabled |
| */ |
| public boolean isScrollbarFadingEnabled() { |
| return mScrollCache != null && mScrollCache.fadeScrollBars; |
| } |
| |
| /** |
| * <p>Specify the style of the scrollbars. The scrollbars can be overlaid or |
| * inset. When inset, they add to the padding of the view. And the scrollbars |
| * can be drawn inside the padding area or on the edge of the view. For example, |
| * if a view has a background drawable and you want to draw the scrollbars |
| * inside the padding specified by the drawable, you can use |
| * SCROLLBARS_INSIDE_OVERLAY or SCROLLBARS_INSIDE_INSET. If you want them to |
| * appear at the edge of the view, ignoring the padding, then you can use |
| * SCROLLBARS_OUTSIDE_OVERLAY or SCROLLBARS_OUTSIDE_INSET.</p> |
| * @param style the style of the scrollbars. Should be one of |
| * SCROLLBARS_INSIDE_OVERLAY, SCROLLBARS_INSIDE_INSET, |
| * SCROLLBARS_OUTSIDE_OVERLAY or SCROLLBARS_OUTSIDE_INSET. |
| * @see #SCROLLBARS_INSIDE_OVERLAY |
| * @see #SCROLLBARS_INSIDE_INSET |
| * @see #SCROLLBARS_OUTSIDE_OVERLAY |
| * @see #SCROLLBARS_OUTSIDE_INSET |
| */ |
| public void setScrollBarStyle(int style) { |
| if (style != (mViewFlags & SCROLLBARS_STYLE_MASK)) { |
| mViewFlags = (mViewFlags & ~SCROLLBARS_STYLE_MASK) | (style & SCROLLBARS_STYLE_MASK); |
| computeOpaqueFlags(); |
| resolvePadding(); |
| } |
| } |
| |
| /** |
| * <p>Returns the current scrollbar style.</p> |
| * @return the current scrollbar style |
| * @see #SCROLLBARS_INSIDE_OVERLAY |
| * @see #SCROLLBARS_INSIDE_INSET |
| * @see #SCROLLBARS_OUTSIDE_OVERLAY |
| * @see #SCROLLBARS_OUTSIDE_INSET |
| */ |
| public int getScrollBarStyle() { |
| return mViewFlags & SCROLLBARS_STYLE_MASK; |
| } |
| |
| /** |
| * <p>Compute the horizontal range that the horizontal scrollbar |
| * represents.</p> |
| * |
| * <p>The range is expressed in arbitrary units that must be the same as the |
| * units used by {@link #computeHorizontalScrollExtent()} and |
| * {@link #computeHorizontalScrollOffset()}.</p> |
| * |
| * <p>The default range is the drawing width of this view.</p> |
| * |
| * @return the total horizontal range represented by the horizontal |
| * scrollbar |
| * |
| * @see #computeHorizontalScrollExtent() |
| * @see #computeHorizontalScrollOffset() |
| * @see android.widget.ScrollBarDrawable |
| */ |
| protected int computeHorizontalScrollRange() { |
| return getWidth(); |
| } |
| |
| /** |
| * <p>Compute the horizontal offset of the horizontal scrollbar's thumb |
| * within the horizontal range. This value is used to compute the position |
| * of the thumb within the scrollbar's track.</p> |
| * |
| * <p>The range is expressed in arbitrary units that must be the same as the |
| * units used by {@link #computeHorizontalScrollRange()} and |
| * {@link #computeHorizontalScrollExtent()}.</p> |
| * |
| * <p>The default offset is the scroll offset of this view.</p> |
| * |
| * @return the horizontal offset of the scrollbar's thumb |
| * |
| * @see #computeHorizontalScrollRange() |
| * @see #computeHorizontalScrollExtent() |
| * @see android.widget.ScrollBarDrawable |
| */ |
| protected int computeHorizontalScrollOffset() { |
| return mScrollX; |
| } |
| |
| /** |
| * <p>Compute the horizontal extent of the horizontal scrollbar's thumb |
| * within the horizontal range. This value is used to compute the length |
| * of the thumb within the scrollbar's track.</p> |
| * |
| * <p>The range is expressed in arbitrary units that must be the same as the |
| * units used by {@link #computeHorizontalScrollRange()} and |
| * {@link #computeHorizontalScrollOffset()}.</p> |
| * |
| * <p>The default extent is the drawing width of this view.</p> |
| * |
| * @return the horizontal extent of the scrollbar's thumb |
| * |
| * @see #computeHorizontalScrollRange() |
| * @see #computeHorizontalScrollOffset() |
| * @see android.widget.ScrollBarDrawable |
| */ |
| protected int computeHorizontalScrollExtent() { |
| return getWidth(); |
| } |
| |
| /** |
| * <p>Compute the vertical range that the vertical scrollbar represents.</p> |
| * |
| * <p>The range is expressed in arbitrary units that must be the same as the |
| * units used by {@link #computeVerticalScrollExtent()} and |
| * {@link #computeVerticalScrollOffset()}.</p> |
| * |
| * @return the total vertical range represented by the vertical scrollbar |
| * |
| * <p>The default range is the drawing height of this view.</p> |
| * |
| * @see #computeVerticalScrollExtent() |
| * @see #computeVerticalScrollOffset() |
| * @see android.widget.ScrollBarDrawable |
| */ |
| protected int computeVerticalScrollRange() { |
| return getHeight(); |
| } |
| |
| /** |
| * <p>Compute the vertical offset of the vertical scrollbar's thumb |
| * within the horizontal range. This value is used to compute the position |
| * of the thumb within the scrollbar's track.</p> |
| * |
| * <p>The range is expressed in arbitrary units that must be the same as the |
| * units used by {@link #computeVerticalScrollRange()} and |
| * {@link #computeVerticalScrollExtent()}.</p> |
| * |
| * <p>The default offset is the scroll offset of this view.</p> |
| * |
| * @return the vertical offset of the scrollbar's thumb |
| * |
| * @see #computeVerticalScrollRange() |
| * @see #computeVerticalScrollExtent() |
| * @see android.widget.ScrollBarDrawable |
| */ |
| protected int computeVerticalScrollOffset() { |
| return mScrollY; |
| } |
| |
| /** |
| * <p>Compute the vertical extent of the horizontal scrollbar's thumb |
| * within the vertical range. This value is used to compute the length |
| * of the thumb within the scrollbar's track.</p> |
| * |
| * <p>The range is expressed in arbitrary units that must be the same as the |
| * units used by {@link #computeVerticalScrollRange()} and |
| * {@link #computeVerticalScrollOffset()}.</p> |
| * |
| * <p>The default extent is the drawing height of this view.</p> |
| * |
| * @return the vertical extent of the scrollbar's thumb |
| * |
| * @see #computeVerticalScrollRange() |
| * @see #computeVerticalScrollOffset() |
| * @see android.widget.ScrollBarDrawable |
| */ |
| protected int computeVerticalScrollExtent() { |
| return getHeight(); |
| } |
| |
| /** |
| * Check if this view can be scrolled horizontally in a certain direction. |
| * |
| * @param direction Negative to check scrolling left, positive to check scrolling right. |
| * @return true if this view can be scrolled in the specified direction, false otherwise. |
| */ |
| public boolean canScrollHorizontally(int direction) { |
| final int offset = computeHorizontalScrollOffset(); |
| final int range = computeHorizontalScrollRange() - computeHorizontalScrollExtent(); |
| if (range == 0) return false; |
| if (direction < 0) { |
| return offset > 0; |
| } else { |
| return offset < range - 1; |
| } |
| } |
| |
| /** |
| * Check if this view can be scrolled vertically in a certain direction. |
| * |
| * @param direction Negative to check scrolling up, positive to check scrolling down. |
| * @return true if this view can be scrolled in the specified direction, false otherwise. |
| */ |
| public boolean canScrollVertically(int direction) { |
| final int offset = computeVerticalScrollOffset(); |
| final int range = computeVerticalScrollRange() - computeVerticalScrollExtent(); |
| if (range == 0) return false; |
| if (direction < 0) { |
| return offset > 0; |
| } else { |
| return offset < range - 1; |
| } |
| } |
| |
| /** |
| * <p>Request the drawing of the horizontal and the vertical scrollbar. The |
| * scrollbars are painted only if they have been awakened first.</p> |
| * |
| * @param canvas the canvas on which to draw the scrollbars |
| * |
| * @see #awakenScrollBars(int) |
| */ |
| protected final void onDrawScrollBars(Canvas canvas) { |
| // scrollbars are drawn only when the animation is running |
| final ScrollabilityCache cache = mScrollCache; |
| if (cache != null) { |
| |
| int state = cache.state; |
| |
| if (state == ScrollabilityCache.OFF) { |
| return; |
| } |
| |
| boolean invalidate = false; |
| |
| if (state == ScrollabilityCache.FADING) { |
| // We're fading -- get our fade interpolation |
| if (cache.interpolatorValues == null) { |
| cache.interpolatorValues = new float[1]; |
| } |
| |
| float[] values = cache.interpolatorValues; |
| |
| // Stops the animation if we're done |
| if (cache.scrollBarInterpolator.timeToValues(values) == |
| Interpolator.Result.FREEZE_END) { |
| cache.state = ScrollabilityCache.OFF; |
| } else { |
| cache.scrollBar.setAlpha(Math.round(values[0])); |
| } |
| |
| // This will make the scroll bars inval themselves after |
| // drawing. We only want this when we're fading so that |
| // we prevent excessive redraws |
| invalidate = true; |
| } else { |
| // We're just on -- but we may have been fading before so |
| // reset alpha |
| cache.scrollBar.setAlpha(255); |
| } |
| |
| |
| final int viewFlags = mViewFlags; |
| |
| final boolean drawHorizontalScrollBar = |
| (viewFlags & SCROLLBARS_HORIZONTAL) == SCROLLBARS_HORIZONTAL; |
| final boolean drawVerticalScrollBar = |
| (viewFlags & SCROLLBARS_VERTICAL) == SCROLLBARS_VERTICAL |
| && !isVerticalScrollBarHidden(); |
| |
| if (drawVerticalScrollBar || drawHorizontalScrollBar) { |
| final int width = mRight - mLeft; |
| final int height = mBottom - mTop; |
| |
| final ScrollBarDrawable scrollBar = cache.scrollBar; |
| |
| final int scrollX = mScrollX; |
| final int scrollY = mScrollY; |
| final int inside = (viewFlags & SCROLLBARS_OUTSIDE_MASK) == 0 ? ~0 : 0; |
| |
| int left, top, right, bottom; |
| |
| if (drawHorizontalScrollBar) { |
| int size = scrollBar.getSize(false); |
| if (size <= 0) { |
| size = cache.scrollBarSize; |
| } |
| |
| scrollBar.setParameters(computeHorizontalScrollRange(), |
| computeHorizontalScrollOffset(), |
| computeHorizontalScrollExtent(), false); |
| final int verticalScrollBarGap = drawVerticalScrollBar ? |
| getVerticalScrollbarWidth() : 0; |
| top = scrollY + height - size - (mUserPaddingBottom & inside); |
| left = scrollX + (mPaddingLeft & inside); |
| right = scrollX + width - (mUserPaddingRight & inside) - verticalScrollBarGap; |
| bottom = top + size; |
| onDrawHorizontalScrollBar(canvas, scrollBar, left, top, right, bottom); |
| if (invalidate) { |
| invalidate(left, top, right, bottom); |
| } |
| } |
| |
| if (drawVerticalScrollBar) { |
| int size = scrollBar.getSize(true); |
| if (size <= 0) { |
| size = cache.scrollBarSize; |
| } |
| |
| scrollBar.setParameters(computeVerticalScrollRange(), |
| computeVerticalScrollOffset(), |
| computeVerticalScrollExtent(), true); |
| switch (mVerticalScrollbarPosition) { |
| default: |
| case SCROLLBAR_POSITION_DEFAULT: |
| case SCROLLBAR_POSITION_RIGHT: |
| left = scrollX + width - size - (mUserPaddingRight & inside); |
| break; |
| case SCROLLBAR_POSITION_LEFT: |
| left = scrollX + (mUserPaddingLeft & inside); |
| break; |
| } |
| top = scrollY + (mPaddingTop & inside); |
| right = left + size; |
| bottom = scrollY + height - (mUserPaddingBottom & inside); |
| onDrawVerticalScrollBar(canvas, scrollBar, left, top, right, bottom); |
| if (invalidate) { |
| invalidate(left, top, right, bottom); |
| } |
| } |
| } |
| } |
| } |
| |
| /** |
| * Override this if the vertical scrollbar needs to be hidden in a subclass, like when |
| * FastScroller is visible. |
| * @return whether to temporarily hide the vertical scrollbar |
| * @hide |
| */ |
| protected boolean isVerticalScrollBarHidden() { |
| return false; |
| } |
| |
| /** |
| * <p>Draw the horizontal scrollbar if |
| * {@link #isHorizontalScrollBarEnabled()} returns true.</p> |
| * |
| * @param canvas the canvas on which to draw the scrollbar |
| * @param scrollBar the scrollbar's drawable |
| * |
| * @see #isHorizontalScrollBarEnabled() |
| * @see #computeHorizontalScrollRange() |
| * @see #computeHorizontalScrollExtent() |
| * @see #computeHorizontalScrollOffset() |
| * @see android.widget.ScrollBarDrawable |
| * @hide |
| */ |
| protected void onDrawHorizontalScrollBar(Canvas canvas, Drawable scrollBar, |
| int l, int t, int r, int b) { |
| scrollBar.setBounds(l, t, r, b); |
| scrollBar.draw(canvas); |
| } |
| |
| /** |
| * <p>Draw the vertical scrollbar if {@link #isVerticalScrollBarEnabled()} |
| * returns true.</p> |
| * |
| * @param canvas the canvas on which to draw the scrollbar |
| * @param scrollBar the scrollbar's drawable |
| * |
| * @see #isVerticalScrollBarEnabled() |
| * @see #computeVerticalScrollRange() |
| * @see #computeVerticalScrollExtent() |
| * @see #computeVerticalScrollOffset() |
| * @see android.widget.ScrollBarDrawable |
| * @hide |
| */ |
| protected void onDrawVerticalScrollBar(Canvas canvas, Drawable scrollBar, |
| int l, int t, int r, int b) { |
| scrollBar.setBounds(l, t, r, b); |
| scrollBar.draw(canvas); |
| } |
| |
| /** |
| * Implement this to do your drawing. |
| * |
| * @param canvas the canvas on which the background will be drawn |
| */ |
| protected void onDraw(Canvas canvas) { |
| } |
| |
| /* |
| * Caller is responsible for calling requestLayout if necessary. |
| * (This allows addViewInLayout to not request a new layout.) |
| */ |
| void assignParent(ViewParent parent) { |
| if (mParent == null) { |
| mParent = parent; |
| } else if (parent == null) { |
| mParent = null; |
| } else { |
| throw new RuntimeException("view " + this + " being added, but" |
| + " it already has a parent"); |
| } |
| } |
| |
| /** |
| * This is called when the view is attached to a window. At this point it |
| * has a Surface and will start drawing. Note that this function is |
| * guaranteed to be called before {@link #onDraw(android.graphics.Canvas)}, |
| * however it may be called any time before the first onDraw -- including |
| * before or after {@link #onMeasure(int, int)}. |
| * |
| * @see #onDetachedFromWindow() |
| */ |
| protected void onAttachedToWindow() { |
| if ((mPrivateFlags & REQUEST_TRANSPARENT_REGIONS) != 0) { |
| mParent.requestTransparentRegion(this); |
| } |
| if ((mPrivateFlags & AWAKEN_SCROLL_BARS_ON_ATTACH) != 0) { |
| initialAwakenScrollBars(); |
| mPrivateFlags &= ~AWAKEN_SCROLL_BARS_ON_ATTACH; |
| } |
| jumpDrawablesToCurrentState(); |
| resolveLayoutDirectionIfNeeded(); |
| resolvePadding(); |
| resolveTextDirection(); |
| if (isFocused()) { |
| InputMethodManager imm = InputMethodManager.peekInstance(); |
| imm.focusIn(this); |
| } |
| } |
| |
| /** |
| * Resolve and cache the layout direction. LTR is set initially. This is implicitly supposing |
| * that the parent directionality can and will be resolved before its children. |
| */ |
| private void resolveLayoutDirectionIfNeeded() { |
| // Do not resolve if it is not needed |
| if ((mPrivateFlags2 & LAYOUT_DIRECTION_RESOLVED) == LAYOUT_DIRECTION_RESOLVED) return; |
| |
| // Clear any previous layout direction resolution |
| mPrivateFlags2 &= ~LAYOUT_DIRECTION_RESOLVED_RTL; |
| |
| // Set resolved depending on layout direction |
| switch (getLayoutDirection()) { |
| case LAYOUT_DIRECTION_INHERIT: |
| // If this is root view, no need to look at parent's layout dir. |
| if (mParent != null && |
| mParent instanceof ViewGroup && |
| ((ViewGroup) mParent).getResolvedLayoutDirection() == LAYOUT_DIRECTION_RTL) { |
| mPrivateFlags2 |= LAYOUT_DIRECTION_RESOLVED_RTL; |
| } |
| break; |
| case LAYOUT_DIRECTION_RTL: |
| mPrivateFlags2 |= LAYOUT_DIRECTION_RESOLVED_RTL; |
| break; |
| case LAYOUT_DIRECTION_LOCALE: |
| if(isLayoutDirectionRtl(Locale.getDefault())) { |
| mPrivateFlags2 |= LAYOUT_DIRECTION_RESOLVED_RTL; |
| } |
| break; |
| default: |
| // Nothing to do, LTR by default |
| } |
| |
| // Set to resolved |
| mPrivateFlags2 |= LAYOUT_DIRECTION_RESOLVED; |
| } |
| |
| private void resolvePadding() { |
| // If the user specified the absolute padding (either with android:padding or |
| // android:paddingLeft/Top/Right/Bottom), use this padding, otherwise |
| // use the default padding or the padding from the background drawable |
| // (stored at this point in mPadding*) |
| switch (getResolvedLayoutDirection()) { |
| case LAYOUT_DIRECTION_RTL: |
| // Start user padding override Right user padding. Otherwise, if Right user |
| // padding is not defined, use the default Right padding. If Right user padding |
| // is defined, just use it. |
| if (mUserPaddingStart >= 0) { |
| mUserPaddingRight = mUserPaddingStart; |
| } else if (mUserPaddingRight < 0) { |
| mUserPaddingRight = mPaddingRight; |
| } |
| if (mUserPaddingEnd >= 0) { |
| mUserPaddingLeft = mUserPaddingEnd; |
| } else if (mUserPaddingLeft < 0) { |
| mUserPaddingLeft = mPaddingLeft; |
| } |
| break; |
| case LAYOUT_DIRECTION_LTR: |
| default: |
| // Start user padding override Left user padding. Otherwise, if Left user |
| // padding is not defined, use the default left padding. If Left user padding |
| // is defined, just use it. |
| if (mUserPaddingStart > 0) { |
| mUserPaddingLeft = mUserPaddingStart; |
| } else if (mUserPaddingLeft < 0) { |
| mUserPaddingLeft = mPaddingLeft; |
| } |
| if (mUserPaddingEnd > 0) { |
| mUserPaddingRight = mUserPaddingEnd; |
| } else if (mUserPaddingRight < 0) { |
| mUserPaddingRight = mPaddingRight; |
| } |
| } |
| |
| mUserPaddingBottom = (mUserPaddingBottom >= 0) ? mUserPaddingBottom : mPaddingBottom; |
| |
| recomputePadding(); |
| } |
| |
| /** |
| * Reset the resolved layout direction. |
| * |
| * Subclasses need to override this method to clear cached information that depends on the |
| * resolved layout direction, or to inform child views that inherit their layout direction. |
| * Overrides must also call the superclass implementation at the start of their implementation. |
| * |
| * @hide |
| */ |
| protected void resetResolvedLayoutDirection() { |
| // Reset the current View resolution |
| mPrivateFlags2 &= ~LAYOUT_DIRECTION_RESOLVED; |
| } |
| |
| /** |
| * Check if a Locale is corresponding to a RTL script. |
| * |
| * @param locale Locale to check |
| * @return true if a Locale is corresponding to a RTL script. |
| */ |
| protected static boolean isLayoutDirectionRtl(Locale locale) { |
| return (LocaleUtil.TEXT_LAYOUT_DIRECTION_RTL_DO_NOT_USE == |
| LocaleUtil.getLayoutDirectionFromLocale(locale)); |
| } |
| |
| /** |
| * This is called when the view is detached from a window. At this point it |
| * no longer has a surface for drawing. |
| * |
| * @see #onAttachedToWindow() |
| */ |
| protected void onDetachedFromWindow() { |
| mPrivateFlags &= ~CANCEL_NEXT_UP_EVENT; |
| |
| removeUnsetPressCallback(); |
| removeLongPressCallback(); |
| removePerformClickCallback(); |
| removeSendViewScrolledAccessibilityEventCallback(); |
| |
| destroyDrawingCache(); |
| |
| if (mHardwareLayer != null) { |
| mHardwareLayer.destroy(); |
| mHardwareLayer = null; |
| } |
| |
| if (mDisplayList != null) { |
| mDisplayList.invalidate(); |
| } |
| |
| if (mAttachInfo != null) { |
| mAttachInfo.mHandler.removeMessages(AttachInfo.INVALIDATE_MSG, this); |
| mAttachInfo.mHandler.removeMessages(AttachInfo.INVALIDATE_RECT_MSG, this); |
| } |
| |
| mCurrentAnimation = null; |
| |
| resetResolvedLayoutDirection(); |
| resetResolvedTextDirection(); |
| } |
| |
| /** |
| * @return The number of times this view has been attached to a window |
| */ |
| protected int getWindowAttachCount() { |
| return mWindowAttachCount; |
| } |
| |
| /** |
| * Retrieve a unique token identifying the window this view is attached to. |
| * @return Return the window's token for use in |
| * {@link WindowManager.LayoutParams#token WindowManager.LayoutParams.token}. |
| */ |
| public IBinder getWindowToken() { |
| return mAttachInfo != null ? mAttachInfo.mWindowToken : null; |
| } |
| |
| /** |
| * Retrieve a unique token identifying the top-level "real" window of |
| * the window that this view is attached to. That is, this is like |
| * {@link #getWindowToken}, except if the window this view in is a panel |
| * window (attached to another containing window), then the token of |
| * the containing window is returned instead. |
| * |
| * @return Returns the associated window token, either |
| * {@link #getWindowToken()} or the containing window's token. |
| */ |
| public IBinder getApplicationWindowToken() { |
| AttachInfo ai = mAttachInfo; |
| if (ai != null) { |
| IBinder appWindowToken = ai.mPanelParentWindowToken; |
| if (appWindowToken == null) { |
| appWindowToken = ai.mWindowToken; |
| } |
| return appWindowToken; |
| } |
| return null; |
| } |
| |
| /** |
| * Retrieve private session object this view hierarchy is using to |
| * communicate with the window manager. |
| * @return the session object to communicate with the window manager |
| */ |
| /*package*/ IWindowSession getWindowSession() { |
| return mAttachInfo != null ? mAttachInfo.mSession : null; |
| } |
| |
| /** |
| * @param info the {@link android.view.View.AttachInfo} to associated with |
| * this view |
| */ |
| void dispatchAttachedToWindow(AttachInfo info, int visibility) { |
| //System.out.println("Attached! " + this); |
| mAttachInfo = info; |
| mWindowAttachCount++; |
| // We will need to evaluate the drawable state at least once. |
| mPrivateFlags |= DRAWABLE_STATE_DIRTY; |
| if (mFloatingTreeObserver != null) { |
| info.mTreeObserver.merge(mFloatingTreeObserver); |
| mFloatingTreeObserver = null; |
| } |
| if ((mPrivateFlags&SCROLL_CONTAINER) != 0) { |
| mAttachInfo.mScrollContainers.add(this); |
| mPrivateFlags |= SCROLL_CONTAINER_ADDED; |
| } |
| performCollectViewAttributes(visibility); |
| onAttachedToWindow(); |
| |
| final CopyOnWriteArrayList<OnAttachStateChangeListener> listeners = |
| mOnAttachStateChangeListeners; |
| if (listeners != null && listeners.size() > 0) { |
| // NOTE: because of the use of CopyOnWriteArrayList, we *must* use an iterator to |
| // perform the dispatching. The iterator is a safe guard against listeners that |
| // could mutate the list by calling the various add/remove methods. This prevents |
| // the array from being modified while we iterate it. |
| for (OnAttachStateChangeListener listener : listeners) { |
| listener.onViewAttachedToWindow(this); |
| } |
| } |
| |
| int vis = info.mWindowVisibility; |
| if (vis != GONE) { |
| onWindowVisibilityChanged(vis); |
| } |
| if ((mPrivateFlags&DRAWABLE_STATE_DIRTY) != 0) { |
| // If nobody has evaluated the drawable state yet, then do it now. |
| refreshDrawableState(); |
| } |
| } |
| |
| void dispatchDetachedFromWindow() { |
| AttachInfo info = mAttachInfo; |
| if (info != null) { |
| int vis = info.mWindowVisibility; |
| if (vis != GONE) { |
| onWindowVisibilityChanged(GONE); |
| } |
| } |
| |
| onDetachedFromWindow(); |
| |
| final CopyOnWriteArrayList<OnAttachStateChangeListener> listeners = |
| mOnAttachStateChangeListeners; |
| if (listeners != null && listeners.size() > 0) { |
| // NOTE: because of the use of CopyOnWriteArrayList, we *must* use an iterator to |
| // perform the dispatching. The iterator is a safe guard against listeners that |
| // could mutate the list by calling the various add/remove methods. This prevents |
| // the array from being modified while we iterate it. |
| for (OnAttachStateChangeListener listener : listeners) { |
| listener.onViewDetachedFromWindow(this); |
| } |
| } |
| |
| if ((mPrivateFlags & SCROLL_CONTAINER_ADDED) != 0) { |
| mAttachInfo.mScrollContainers.remove(this); |
| mPrivateFlags &= ~SCROLL_CONTAINER_ADDED; |
| } |
| |
| mAttachInfo = null; |
| } |
| |
| /** |
| * Store this view hierarchy's frozen state into the given container. |
| * |
| * @param container The SparseArray in which to save the view's state. |
| * |
| * @see #restoreHierarchyState(android.util.SparseArray) |
| * @see #dispatchSaveInstanceState(android.util.SparseArray) |
| * @see #onSaveInstanceState() |
| */ |
| public void saveHierarchyState(SparseArray<Parcelable> container) { |
| dispatchSaveInstanceState(container); |
| } |
| |
| /** |
| * Called by {@link #saveHierarchyState(android.util.SparseArray)} to store the state for |
| * this view and its children. May be overridden to modify how freezing happens to a |
| * view's children; for example, some views may want to not store state for their children. |
| * |
| * @param container The SparseArray in which to save the view's state. |
| * |
| * @see #dispatchRestoreInstanceState(android.util.SparseArray) |
| * @see #saveHierarchyState(android.util.SparseArray) |
| * @see #onSaveInstanceState() |
| */ |
| protected void dispatchSaveInstanceState(SparseArray<Parcelable> container) { |
| if (mID != NO_ID && (mViewFlags & SAVE_DISABLED_MASK) == 0) { |
| mPrivateFlags &= ~SAVE_STATE_CALLED; |
| Parcelable state = onSaveInstanceState(); |
| if ((mPrivateFlags & SAVE_STATE_CALLED) == 0) { |
| throw new IllegalStateException( |
| "Derived class did not call super.onSaveInstanceState()"); |
| } |
| if (state != null) { |
| // Log.i("View", "Freezing #" + Integer.toHexString(mID) |
| // + ": " + state); |
| container.put(mID, state); |
| } |
| } |
| } |
| |
| /** |
| * Hook allowing a view to generate a representation of its internal state |
| * that can later be used to create a new instance with that same state. |
| * This state should only contain information that is not persistent or can |
| * not be reconstructed later. For example, you will never store your |
| * current position on screen because that will be computed again when a |
| * new instance of the view is placed in its view hierarchy. |
| * <p> |
| * Some examples of things you may store here: the current cursor position |
| * in a text view (but usually not the text itself since that is stored in a |
| * content provider or other persistent storage), the currently selected |
| * item in a list view. |
| * |
| * @return Returns a Parcelable object containing the view's current dynamic |
| * state, or null if there is nothing interesting to save. The |
| * default implementation returns null. |
| * @see #onRestoreInstanceState(android.os.Parcelable) |
| * @see #saveHierarchyState(android.util.SparseArray) |
| * @see #dispatchSaveInstanceState(android.util.SparseArray) |
| * @see #setSaveEnabled(boolean) |
| */ |
| protected Parcelable onSaveInstanceState() { |
| mPrivateFlags |= SAVE_STATE_CALLED; |
| return BaseSavedState.EMPTY_STATE; |
| } |
| |
| /** |
| * Restore this view hierarchy's frozen state from the given container. |
| * |
| * @param container The SparseArray which holds previously frozen states. |
| * |
| * @see #saveHierarchyState(android.util.SparseArray) |
| * @see #dispatchRestoreInstanceState(android.util.SparseArray) |
| * @see #onRestoreInstanceState(android.os.Parcelable) |
| */ |
| public void restoreHierarchyState(SparseArray<Parcelable> container) { |
| dispatchRestoreInstanceState(container); |
| } |
| |
| /** |
| * Called by {@link #restoreHierarchyState(android.util.SparseArray)} to retrieve the |
| * state for this view and its children. May be overridden to modify how restoring |
| * happens to a view's children; for example, some views may want to not store state |
| * for their children. |
| * |
| * @param container The SparseArray which holds previously saved state. |
| * |
| * @see #dispatchSaveInstanceState(android.util.SparseArray) |
| * @see #restoreHierarchyState(android.util.SparseArray) |
| * @see #onRestoreInstanceState(android.os.Parcelable) |
| */ |
| protected void dispatchRestoreInstanceState(SparseArray<Parcelable> container) { |
| if (mID != NO_ID) { |
| Parcelable state = container.get(mID); |
| if (state != null) { |
| // Log.i("View", "Restoreing #" + Integer.toHexString(mID) |
| // + ": " + state); |
| mPrivateFlags &= ~SAVE_STATE_CALLED; |
| onRestoreInstanceState(state); |
| if ((mPrivateFlags & SAVE_STATE_CALLED) == 0) { |
| throw new IllegalStateException( |
| "Derived class did not call super.onRestoreInstanceState()"); |
| } |
| } |
| } |
| } |
| |
| /** |
| * Hook allowing a view to re-apply a representation of its internal state that had previously |
| * been generated by {@link #onSaveInstanceState}. This function will never be called with a |
| * null state. |
| * |
| * @param state The frozen state that had previously been returned by |
| * {@link #onSaveInstanceState}. |
| * |
| * @see #onSaveInstanceState() |
| * @see #restoreHierarchyState(android.util.SparseArray) |
| * @see #dispatchRestoreInstanceState(android.util.SparseArray) |
| */ |
| protected void onRestoreInstanceState(Parcelable state) { |
| mPrivateFlags |= SAVE_STATE_CALLED; |
| if (state != BaseSavedState.EMPTY_STATE && state != null) { |
| throw new IllegalArgumentException("Wrong state class, expecting View State but " |
| + "received " + state.getClass().toString() + " instead. This usually happens " |
| + "when two views of different type have the same id in the same hierarchy. " |
| + "This view's id is " + ViewDebug.resolveId(mContext, getId()) + ". Make sure " |
| + "other views do not use the same id."); |
| } |
| } |
| |
| /** |
| * <p>Return the time at which the drawing of the view hierarchy started.</p> |
| * |
| * @return the drawing start time in milliseconds |
| */ |
| public long getDrawingTime() { |
| return mAttachInfo != null ? mAttachInfo.mDrawingTime : 0; |
| } |
| |
| /** |
| * <p>Enables or disables the duplication of the parent's state into this view. When |
| * duplication is enabled, this view gets its drawable state from its parent rather |
| * than from its own internal properties.</p> |
| * |
| * <p>Note: in the current implementation, setting this property to true after the |
| * view was added to a ViewGroup might have no effect at all. This property should |
| * always be used from XML or set to true before adding this view to a ViewGroup.</p> |
| * |
| * <p>Note: if this view's parent addStateFromChildren property is enabled and this |
| * property is enabled, an exception will be thrown.</p> |
| * |
| * <p>Note: if the child view uses and updates additionnal states which are unknown to the |
| * parent, these states should not be affected by this method.</p> |
| * |
| * @param enabled True to enable duplication of the parent's drawable state, false |
| * to disable it. |
| * |
| * @see #getDrawableState() |
| * @see #isDuplicateParentStateEnabled() |
| */ |
| public void setDuplicateParentStateEnabled(boolean enabled) { |
| setFlags(enabled ? DUPLICATE_PARENT_STATE : 0, DUPLICATE_PARENT_STATE); |
| } |
| |
| /** |
| * <p>Indicates whether this duplicates its drawable state from its parent.</p> |
| * |
| * @return True if this view's drawable state is duplicated from the parent, |
| * false otherwise |
| * |
| * @see #getDrawableState() |
| * @see #setDuplicateParentStateEnabled(boolean) |
| */ |
| public boolean isDuplicateParentStateEnabled() { |
| return (mViewFlags & DUPLICATE_PARENT_STATE) == DUPLICATE_PARENT_STATE; |
| } |
| |
| /** |
| * <p>Specifies the type of layer backing this view. The layer can be |
| * {@link #LAYER_TYPE_NONE disabled}, {@link #LAYER_TYPE_SOFTWARE software} or |
| * {@link #LAYER_TYPE_HARDWARE hardware}.</p> |
| * |
| * <p>A layer is associated with an optional {@link android.graphics.Paint} |
| * instance that controls how the layer is composed on screen. The following |
| * properties of the paint are taken into account when composing the layer:</p> |
| * <ul> |
| * <li>{@link android.graphics.Paint#getAlpha() Translucency (alpha)}</li> |
| * <li>{@link android.graphics.Paint#getXfermode() Blending mode}</li> |
| * <li>{@link android.graphics.Paint#getColorFilter() Color filter}</li> |
| * </ul> |
| * |
| * <p>If this view has an alpha value set to < 1.0 by calling |
| * {@link #setAlpha(float)}, the alpha value of the layer's paint is replaced by |
| * this view's alpha value. Calling {@link #setAlpha(float)} is therefore |
| * equivalent to setting a hardware layer on this view and providing a paint with |
| * the desired alpha value.<p> |
| * |
| * <p>Refer to the documentation of {@link #LAYER_TYPE_NONE disabled}, |
| * {@link #LAYER_TYPE_SOFTWARE software} and {@link #LAYER_TYPE_HARDWARE hardware} |
| * for more information on when and how to use layers.</p> |
| * |
| * @param layerType The ype of layer to use with this view, must be one of |
| * {@link #LAYER_TYPE_NONE}, {@link #LAYER_TYPE_SOFTWARE} or |
| * {@link #LAYER_TYPE_HARDWARE} |
| * @param paint The paint used to compose the layer. This argument is optional |
| * and can be null. It is ignored when the layer type is |
| * {@link #LAYER_TYPE_NONE} |
| * |
| * @see #getLayerType() |
| * @see #LAYER_TYPE_NONE |
| * @see #LAYER_TYPE_SOFTWARE |
| * @see #LAYER_TYPE_HARDWARE |
| * @see #setAlpha(float) |
| * |
| * @attr ref android.R.styleable#View_layerType |
| */ |
| public void setLayerType(int layerType, Paint paint) { |
| if (layerType < LAYER_TYPE_NONE || layerType > LAYER_TYPE_HARDWARE) { |
| throw new IllegalArgumentException("Layer type can only be one of: LAYER_TYPE_NONE, " |
| + "LAYER_TYPE_SOFTWARE or LAYER_TYPE_HARDWARE"); |
| } |
| |
| if (layerType == mLayerType) { |
| if (layerType != LAYER_TYPE_NONE && paint != mLayerPaint) { |
| mLayerPaint = paint == null ? new Paint() : paint; |
| invalidateParentCaches(); |
| invalidate(true); |
| } |
| return; |
| } |
| |
| // Destroy any previous software drawing cache if needed |
| switch (mLayerType) { |
| case LAYER_TYPE_HARDWARE: |
| if (mHardwareLayer != null) { |
| mHardwareLayer.destroy(); |
| mHardwareLayer = null; |
| } |
| // fall through - unaccelerated views may use software layer mechanism instead |
| case LAYER_TYPE_SOFTWARE: |
| if (mDrawingCache != null) { |
| mDrawingCache.recycle(); |
| mDrawingCache = null; |
| } |
| |
| if (mUnscaledDrawingCache != null) { |
| mUnscaledDrawingCache.recycle(); |
| mUnscaledDrawingCache = null; |
| } |
| break; |
| default: |
| break; |
| } |
| |
| mLayerType = layerType; |
| final boolean layerDisabled = mLayerType == LAYER_TYPE_NONE; |
| mLayerPaint = layerDisabled ? null : (paint == null ? new Paint() : paint); |
| mLocalDirtyRect = layerDisabled ? null : new Rect(); |
| |
| invalidateParentCaches(); |
| invalidate(true); |
| } |
| |
| /** |
| * Indicates what type of layer is currently associated with this view. By default |
| * a view does not have a layer, and the layer type is {@link #LAYER_TYPE_NONE}. |
| * Refer to the documentation of {@link #setLayerType(int, android.graphics.Paint)} |
| * for more information on the different types of layers. |
| * |
| * @return {@link #LAYER_TYPE_NONE}, {@link #LAYER_TYPE_SOFTWARE} or |
| * {@link #LAYER_TYPE_HARDWARE} |
| * |
| * @see #setLayerType(int, android.graphics.Paint) |
| * @see #buildLayer() |
| * @see #LAYER_TYPE_NONE |
| * @see #LAYER_TYPE_SOFTWARE |
| * @see #LAYER_TYPE_HARDWARE |
| */ |
| public int getLayerType() { |
| return mLayerType; |
| } |
| |
| /** |
| * Forces this view's layer to be created and this view to be rendered |
| * into its layer. If this view's layer type is set to {@link #LAYER_TYPE_NONE}, |
| * invoking this method will have no effect. |
| * |
| * This method can for instance be used to render a view into its layer before |
| * starting an animation. If this view is complex, rendering into the layer |
| * before starting the animation will avoid skipping frames. |
| * |
| * @throws IllegalStateException If this view is not attached to a window |
| * |
| * @see #setLayerType(int, android.graphics.Paint) |
| */ |
| public void buildLayer() { |
| if (mLayerType == LAYER_TYPE_NONE) return; |
| |
| if (mAttachInfo == null) { |
| throw new IllegalStateException("This view must be attached to a window first"); |
| } |
| |
| switch (mLayerType) { |
| case LAYER_TYPE_HARDWARE: |
| getHardwareLayer(); |
| break; |
| case LAYER_TYPE_SOFTWARE: |
| buildDrawingCache(true); |
| break; |
| } |
| } |
| |
| /** |
| * <p>Returns a hardware layer that can be used to draw this view again |
| * without executing its draw method.</p> |
| * |
| * @return A HardwareLayer ready to render, or null if an error occurred. |
| */ |
| HardwareLayer getHardwareLayer() { |
| if (mAttachInfo == null || mAttachInfo.mHardwareRenderer == null) { |
| return null; |
| } |
| |
| final int width = mRight - mLeft; |
| final int height = mBottom - mTop; |
| |
| if (width == 0 || height == 0) { |
| return null; |
| } |
| |
| if ((mPrivateFlags & DRAWING_CACHE_VALID) == 0 || mHardwareLayer == null) { |
| if (mHardwareLayer == null) { |
| mHardwareLayer = mAttachInfo.mHardwareRenderer.createHardwareLayer( |
| width, height, isOpaque()); |
| mLocalDirtyRect.setEmpty(); |
| } else if (mHardwareLayer.getWidth() != width || mHardwareLayer.getHeight() != height) { |
| mHardwareLayer.resize(width, height); |
| mLocalDirtyRect.setEmpty(); |
| } |
| |
| HardwareCanvas currentCanvas = mAttachInfo.mHardwareCanvas; |
| final HardwareCanvas canvas = mHardwareLayer.start(currentCanvas); |
| mAttachInfo.mHardwareCanvas = canvas; |
| try { |
| canvas.setViewport(width, height); |
| canvas.onPreDraw(mLocalDirtyRect); |
| mLocalDirtyRect.setEmpty(); |
| |
| final int restoreCount = canvas.save(); |
| |
| computeScroll(); |
| canvas.translate(-mScrollX, -mScrollY); |
| |
| mPrivateFlags |= DRAWN | DRAWING_CACHE_VALID; |
| |
| // Fast path for layouts with no backgrounds |
| if ((mPrivateFlags & SKIP_DRAW) == SKIP_DRAW) { |
| mPrivateFlags &= ~DIRTY_MASK; |
| dispatchDraw(canvas); |
| } else { |
| draw(canvas); |
| } |
| |
| canvas.restoreToCount(restoreCount); |
| } finally { |
| canvas.onPostDraw(); |
| mHardwareLayer.end(currentCanvas); |
| mAttachInfo.mHardwareCanvas = currentCanvas; |
| } |
| } |
| |
| return mHardwareLayer; |
| } |
| |
| /** |
| * <p>Enables or disables the drawing cache. When the drawing cache is enabled, the next call |
| * to {@link #getDrawingCache()} or {@link #buildDrawingCache()} will draw the view in a |
| * bitmap. Calling {@link #draw(android.graphics.Canvas)} will not draw from the cache when |
| * the cache is enabled. To benefit from the cache, you must request the drawing cache by |
| * calling {@link #getDrawingCache()} and draw it on screen if the returned bitmap is not |
| * null.</p> |
| * |
| * <p>Enabling the drawing cache is similar to |
| * {@link #setLayerType(int, android.graphics.Paint) setting a layer} when hardware |
| * acceleration is turned off. When hardware acceleration is turned on, enabling the |
| * drawing cache has no effect on rendering because the system uses a different mechanism |
| * for acceleration which ignores the flag. If you want to use a Bitmap for the view, even |
| * when hardware acceleration is enabled, see {@link #setLayerType(int, android.graphics.Paint)} |
| * for information on how to enable software and hardware layers.</p> |
| * |
| * <p>This API can be used to manually generate |
| * a bitmap copy of this view, by setting the flag to <code>true</code> and calling |
| * {@link #getDrawingCache()}.</p> |
| * |
| * @param enabled true to enable the drawing cache, false otherwise |
| * |
| * @see #isDrawingCacheEnabled() |
| * @see #getDrawingCache() |
| * @see #buildDrawingCache() |
| * @see #setLayerType(int, android.graphics.Paint) |
| */ |
| public void setDrawingCacheEnabled(boolean enabled) { |
| mCachingFailed = false; |
| setFlags(enabled ? DRAWING_CACHE_ENABLED : 0, DRAWING_CACHE_ENABLED); |
| } |
| |
| /** |
| * <p>Indicates whether the drawing cache is enabled for this view.</p> |
| * |
| * @return true if the drawing cache is enabled |
| * |
| * @see #setDrawingCacheEnabled(boolean) |
| * @see #getDrawingCache() |
| */ |
| @ViewDebug.ExportedProperty(category = "drawing") |
| public boolean isDrawingCacheEnabled() { |
| return (mViewFlags & DRAWING_CACHE_ENABLED) == DRAWING_CACHE_ENABLED; |
| } |
| |
| /** |
| * Debugging utility which recursively outputs the dirty state of a view and its |
| * descendants. |
| * |
| * @hide |
| */ |
| @SuppressWarnings({"UnusedDeclaration"}) |
| public void outputDirtyFlags(String indent, boolean clear, int clearMask) { |
| Log.d("View", indent + this + " DIRTY(" + (mPrivateFlags & View.DIRTY_MASK) + |
| ") DRAWN(" + (mPrivateFlags & DRAWN) + ")" + " CACHE_VALID(" + |
| (mPrivateFlags & View.DRAWING_CACHE_VALID) + |
| ") INVALIDATED(" + (mPrivateFlags & INVALIDATED) + ")"); |
| if (clear) { |
| mPrivateFlags &= clearMask; |
| } |
| if (this instanceof ViewGroup) { |
| ViewGroup parent = (ViewGroup) this; |
| final int count = parent.getChildCount(); |
| for (int i = 0; i < count; i++) { |
| final View child = parent.getChildAt(i); |
| child.outputDirtyFlags(indent + " ", clear, clearMask); |
| } |
| } |
| } |
| |
| /** |
| * This method is used by ViewGroup to cause its children to restore or recreate their |
| * display lists. It is called by getDisplayList() when the parent ViewGroup does not need |
| * to recreate its own display list, which would happen if it went through the normal |
| * draw/dispatchDraw mechanisms. |
| * |
| * @hide |
| */ |
| protected void dispatchGetDisplayList() {} |
| |
| /** |
| * A view that is not attached or hardware accelerated cannot create a display list. |
| * This method checks these conditions and returns the appropriate result. |
| * |
| * @return true if view has the ability to create a display list, false otherwise. |
| * |
| * @hide |
| */ |
| public boolean canHaveDisplayList() { |
| return !(mAttachInfo == null || mAttachInfo.mHardwareRenderer == null); |
| } |
| |
| /** |
| * <p>Returns a display list that can be used to draw this view again |
| * without executing its draw method.</p> |
| * |
| * @return A DisplayList ready to replay, or null if caching is not enabled. |
| * |
| * @hide |
| */ |
| public DisplayList getDisplayList() { |
| if (!canHaveDisplayList()) { |
| return null; |
| } |
| |
| if (((mPrivateFlags & DRAWING_CACHE_VALID) == 0 || |
| mDisplayList == null || !mDisplayList.isValid() || |
| mRecreateDisplayList)) { |
| // Don't need to recreate the display list, just need to tell our |
| // children to restore/recreate theirs |
| if (mDisplayList != null && mDisplayList.isValid() && |
| !mRecreateDisplayList) { |
| mPrivateFlags |= DRAWN | DRAWING_CACHE_VALID; |
| mPrivateFlags &= ~DIRTY_MASK; |
| dispatchGetDisplayList(); |
| |
| return mDisplayList; |
| } |
| |
| // If we got here, we're recreating it. Mark it as such to ensure that |
| // we copy in child display lists into ours in drawChild() |
| mRecreateDisplayList = true; |
| if (mDisplayList == null) { |
| mDisplayList = mAttachInfo.mHardwareRenderer.createDisplayList(this); |
| // If we're creating a new display list, make sure our parent gets invalidated |
| // since they will need to recreate their display list to account for this |
| // new child display list. |
| invalidateParentCaches(); |
| } |
| |
| final HardwareCanvas canvas = mDisplayList.start(); |
| try { |
| int width = mRight - mLeft; |
| int height = mBottom - mTop; |
| |
| canvas.setViewport(width, height); |
| // The dirty rect should always be null for a display list |
| canvas.onPreDraw(null); |
| |
| final int restoreCount = canvas.save(); |
| |
| computeScroll(); |
| canvas.translate(-mScrollX, -mScrollY); |
| mPrivateFlags |= DRAWN | DRAWING_CACHE_VALID; |
| mPrivateFlags &= ~DIRTY_MASK; |
| |
| // Fast path for layouts with no backgrounds |
| if ((mPrivateFlags & SKIP_DRAW) == SKIP_DRAW) { |
| dispatchDraw(canvas); |
| } else { |
| draw(canvas); |
| } |
| |
| canvas.restoreToCount(restoreCount); |
| } finally { |
| canvas.onPostDraw(); |
| |
| mDisplayList.end(); |
| } |
| } else { |
| mPrivateFlags |= DRAWN | DRAWING_CACHE_VALID; |
| mPrivateFlags &= ~DIRTY_MASK; |
| } |
| |
| return mDisplayList; |
| } |
| |
| /** |
| * <p>Calling this method is equivalent to calling <code>getDrawingCache(false)</code>.</p> |
| * |
| * @return A non-scaled bitmap representing this view or null if cache is disabled. |
| * |
| * @see #getDrawingCache(boolean) |
| */ |
| public Bitmap getDrawingCache() { |
| return getDrawingCache(false); |
| } |
| |
| /** |
| * <p>Returns the bitmap in which this view drawing is cached. The returned bitmap |
| * is null when caching is disabled. If caching is enabled and the cache is not ready, |
| * this method will create it. Calling {@link #draw(android.graphics.Canvas)} will not |
| * draw from the cache when the cache is enabled. To benefit from the cache, you must |
| * request the drawing cache by calling this method and draw it on screen if the |
| * returned bitmap is not null.</p> |
| * |
| * <p>Note about auto scaling in compatibility mode: When auto scaling is not enabled, |
| * this method will create a bitmap of the same size as this view. Because this bitmap |
| * will be drawn scaled by the parent ViewGroup, the result on screen might show |
| * scaling artifacts. To avoid such artifacts, you should call this method by setting |
| * the auto scaling to true. Doing so, however, will generate a bitmap of a different |
| * size than the view. This implies that your application must be able to handle this |
| * size.</p> |
| * |
| * @param autoScale Indicates whether the generated bitmap should be scaled based on |
| * the current density of the screen when the application is in compatibility |
| * mode. |
| * |
| * @return A bitmap representing this view or null if cache is disabled. |
| * |
| * @see #setDrawingCacheEnabled(boolean) |
| * @see #isDrawingCacheEnabled() |
| * @see #buildDrawingCache(boolean) |
| * @see #destroyDrawingCache() |
| */ |
| public Bitmap getDrawingCache(boolean autoScale) { |
| if ((mViewFlags & WILL_NOT_CACHE_DRAWING) == WILL_NOT_CACHE_DRAWING) { |
| return null; |
| } |
| if ((mViewFlags & DRAWING_CACHE_ENABLED) == DRAWING_CACHE_ENABLED) { |
| buildDrawingCache(autoScale); |
| } |
| return autoScale ? mDrawingCache : mUnscaledDrawingCache; |
| } |
| |
| /** |
| * <p>Frees the resources used by the drawing cache. If you call |
| * {@link #buildDrawingCache()} manually without calling |
| * {@link #setDrawingCacheEnabled(boolean) setDrawingCacheEnabled(true)}, you |
| * should cleanup the cache with this method afterwards.</p> |
| * |
| * @see #setDrawingCacheEnabled(boolean) |
| * @see #buildDrawingCache() |
| * @see #getDrawingCache() |
| */ |
| public void destroyDrawingCache() { |
| if (mDrawingCache != null) { |
| mDrawingCache.recycle(); |
| mDrawingCache = null; |
| } |
| if (mUnscaledDrawingCache != null) { |
| mUnscaledDrawingCache.recycle(); |
| mUnscaledDrawingCache = null; |
| } |
| } |
| |
| /** |
| * Setting a solid background color for the drawing cache's bitmaps will improve |
| * perfromance and memory usage. Note, though that this should only be used if this |
| * view will always be drawn on top of a solid color. |
| * |
| * @param color The background color to use for the drawing cache's bitmap |
| * |
| * @see #setDrawingCacheEnabled(boolean) |
| * @see #buildDrawingCache() |
| * @see #getDrawingCache() |
| */ |
| public void setDrawingCacheBackgroundColor(int color) { |
| if (color != mDrawingCacheBackgroundColor) { |
| mDrawingCacheBackgroundColor = color; |
| mPrivateFlags &= ~DRAWING_CACHE_VALID; |
| } |
| } |
| |
| /** |
| * @see #setDrawingCacheBackgroundColor(int) |
| * |
| * @return The background color to used for the drawing cache's bitmap |
| */ |
| public int getDrawingCacheBackgroundColor() { |
| return mDrawingCacheBackgroundColor; |
| } |
| |
| /** |
| * <p>Calling this method is equivalent to calling <code>buildDrawingCache(false)</code>.</p> |
| * |
| * @see #buildDrawingCache(boolean) |
| */ |
| public void buildDrawingCache() { |
| buildDrawingCache(false); |
| } |
| |
| /** |
| * <p>Forces the drawing cache to be built if the drawing cache is invalid.</p> |
| * |
| * <p>If you call {@link #buildDrawingCache()} manually without calling |
| * {@link #setDrawingCacheEnabled(boolean) setDrawingCacheEnabled(true)}, you |
| * should cleanup the cache by calling {@link #destroyDrawingCache()} afterwards.</p> |
| * |
| * <p>Note about auto scaling in compatibility mode: When auto scaling is not enabled, |
| * this method will create a bitmap of the same size as this view. Because this bitmap |
| * will be drawn scaled by the parent ViewGroup, the result on screen might show |
| * scaling artifacts. To avoid such artifacts, you should call this method by setting |
| * the auto scaling to true. Doing so, however, will generate a bitmap of a different |
| * size than the view. This implies that your application must be able to handle this |
| * size.</p> |
| * |
| * <p>You should avoid calling this method when hardware acceleration is enabled. If |
| * you do not need the drawing cache bitmap, calling this method will increase memory |
| * usage and cause the view to be rendered in software once, thus negatively impacting |
| * performance.</p> |
| * |
| * @see #getDrawingCache() |
| * @see #destroyDrawingCache() |
| */ |
| public void buildDrawingCache(boolean autoScale) { |
| if ((mPrivateFlags & DRAWING_CACHE_VALID) == 0 || (autoScale ? |
| mDrawingCache == null : mUnscaledDrawingCache == null)) { |
| mCachingFailed = false; |
| |
| if (ViewDebug.TRACE_HIERARCHY) { |
| ViewDebug.trace(this, ViewDebug.HierarchyTraceType.BUILD_CACHE); |
| } |
| |
| int width = mRight - mLeft; |
| int height = mBottom - mTop; |
| |
| final AttachInfo attachInfo = mAttachInfo; |
| final boolean scalingRequired = attachInfo != null && attachInfo.mScalingRequired; |
| |
| if (autoScale && scalingRequired) { |
| width = (int) ((width * attachInfo.mApplicationScale) + 0.5f); |
| height = (int) ((height * attachInfo.mApplicationScale) + 0.5f); |
| } |
| |
| final int drawingCacheBackgroundColor = mDrawingCacheBackgroundColor; |
| final boolean opaque = drawingCacheBackgroundColor != 0 || isOpaque(); |
| final boolean use32BitCache = attachInfo != null && attachInfo.mUse32BitDrawingCache; |
| |
| if (width <= 0 || height <= 0 || |
| // Projected bitmap size in bytes |
| (width * height * (opaque && !use32BitCache ? 2 : 4) > |
| ViewConfiguration.get(mContext).getScaledMaximumDrawingCacheSize())) { |
| destroyDrawingCache(); |
| mCachingFailed = true; |
| return; |
| } |
| |
| boolean clear = true; |
| Bitmap bitmap = autoScale ? mDrawingCache : mUnscaledDrawingCache; |
| |
| if (bitmap == null || bitmap.getWidth() != width || bitmap.getHeight() != height) { |
| Bitmap.Config quality; |
| if (!opaque) { |
| // Never pick ARGB_4444 because it looks awful |
| // Keep the DRAWING_CACHE_QUALITY_LOW flag just in case |
| switch (mViewFlags & DRAWING_CACHE_QUALITY_MASK) { |
| case DRAWING_CACHE_QUALITY_AUTO: |
| quality = Bitmap.Config.ARGB_8888; |
| break; |
| case DRAWING_CACHE_QUALITY_LOW: |
| quality = Bitmap.Config.ARGB_8888; |
| break; |
| case DRAWING_CACHE_QUALITY_HIGH: |
| quality = Bitmap.Config.ARGB_8888; |
| break; |
| default: |
| quality = Bitmap.Config.ARGB_8888; |
| break; |
| } |
| } else { |
| // Optimization for translucent windows |
| // If the window is translucent, use a 32 bits bitmap to benefit from memcpy() |
| quality = use32BitCache ? Bitmap.Config.ARGB_8888 : Bitmap.Config.RGB_565; |
| } |
| |
| // Try to cleanup memory |
| if (bitmap != null) bitmap.recycle(); |
| |
| try { |
| bitmap = Bitmap.createBitmap(width, height, quality); |
| bitmap.setDensity(getResources().getDisplayMetrics().densityDpi); |
| if (autoScale) { |
| mDrawingCache = bitmap; |
| } else { |
| mUnscaledDrawingCache = bitmap; |
| } |
| if (opaque && use32BitCache) bitmap.setHasAlpha(false); |
| } catch (OutOfMemoryError e) { |
| // If there is not enough memory to create the bitmap cache, just |
| // ignore the issue as bitmap caches are not required to draw the |
| // view hierarchy |
| if (autoScale) { |
| mDrawingCache = null; |
| } else { |
| mUnscaledDrawingCache = null; |
| } |
| mCachingFailed = true; |
| return; |
| } |
| |
| clear = drawingCacheBackgroundColor != 0; |
| } |
| |
| Canvas canvas; |
| if (attachInfo != null) { |
| canvas = attachInfo.mCanvas; |
| if (canvas == null) { |
| canvas = new Canvas(); |
| } |
| canvas.setBitmap(bitmap); |
| // Temporarily clobber the cached Canvas in case one of our children |
| // is also using a drawing cache. Without this, the children would |
| // steal the canvas by attaching their own bitmap to it and bad, bad |
| // thing would happen (invisible views, corrupted drawings, etc.) |
| attachInfo.mCanvas = null; |
| } else { |
| // This case should hopefully never or seldom happen |
| canvas = new Canvas(bitmap); |
| } |
| |
| if (clear) { |
| bitmap.eraseColor(drawingCacheBackgroundColor); |
| } |
| |
| computeScroll(); |
| final int restoreCount = canvas.save(); |
| |
| if (autoScale && scalingRequired) { |
| final float scale = attachInfo.mApplicationScale; |
| canvas.scale(scale, scale); |
| } |
| |
| canvas.translate(-mScrollX, -mScrollY); |
| |
| mPrivateFlags |= DRAWN; |
| if (mAttachInfo == null || !mAttachInfo.mHardwareAccelerated || |
| mLayerType != LAYER_TYPE_NONE) { |
| mPrivateFlags |= DRAWING_CACHE_VALID; |
| } |
| |
| // Fast path for layouts with no backgrounds |
| if ((mPrivateFlags & SKIP_DRAW) == SKIP_DRAW) { |
| if (ViewDebug.TRACE_HIERARCHY) { |
| ViewDebug.trace(this, ViewDebug.HierarchyTraceType.DRAW); |
| } |
| mPrivateFlags &= ~DIRTY_MASK; |
| dispatchDraw(canvas); |
| } else { |
| draw(canvas); |
| } |
| |
| canvas.restoreToCount(restoreCount); |
| |
| if (attachInfo != null) { |
| // Restore the cached Canvas for our siblings |
| attachInfo.mCanvas = canvas; |
| } |
| } |
| } |
| |
| /** |
| * Create a snapshot of the view into a bitmap. We should probably make |
| * some form of this public, but should think about the API. |
| */ |
| Bitmap createSnapshot(Bitmap.Config quality, int backgroundColor, boolean skipChildren) { |
| int width = mRight - mLeft; |
| int height = mBottom - mTop; |
| |
| final AttachInfo attachInfo = mAttachInfo; |
| final float scale = attachInfo != null ? attachInfo.mApplicationScale : 1.0f; |
| width = (int) ((width * scale) + 0.5f); |
| height = (int) ((height * scale) + 0.5f); |
| |
| Bitmap bitmap = Bitmap.createBitmap(width > 0 ? width : 1, height > 0 ? height : 1, quality); |
| if (bitmap == null) { |
| throw new OutOfMemoryError(); |
| } |
| |
| bitmap.setDensity(getResources().getDisplayMetrics().densityDpi); |
| |
| Canvas canvas; |
| if (attachInfo != null) { |
| canvas = attachInfo.mCanvas; |
| if (canvas == null) { |
| canvas = new Canvas(); |
| } |
| canvas.setBitmap(bitmap); |
| // Temporarily clobber the cached Canvas in case one of our children |
| // is also using a drawing cache. Without this, the children would |
| // steal the canvas by attaching their own bitmap to it and bad, bad |
| // things would happen (invisible views, corrupted drawings, etc.) |
| attachInfo.mCanvas = null; |
| } else { |
| // This case should hopefully never or seldom happen |
| canvas = new Canvas(bitmap); |
| } |
| |
| if ((backgroundColor & 0xff000000) != 0) { |
| bitmap.eraseColor(backgroundColor); |
| } |
| |
| computeScroll(); |
| final int restoreCount = canvas.save(); |
| canvas.scale(scale, scale); |
| canvas.translate(-mScrollX, -mScrollY); |
| |
| // Temporarily remove the dirty mask |
| int flags = mPrivateFlags; |
| mPrivateFlags &= ~DIRTY_MASK; |
| |
| // Fast path for layouts with no backgrounds |
| if ((mPrivateFlags & SKIP_DRAW) == SKIP_DRAW) { |
| dispatchDraw(canvas); |
| } else { |
| draw(canvas); |
| } |
| |
| mPrivateFlags = flags; |
| |
| canvas.restoreToCount(restoreCount); |
| |
| if (attachInfo != null) { |
| // Restore the cached Canvas for our siblings |
| attachInfo.mCanvas = canvas; |
| } |
| |
| return bitmap; |
| } |
| |
| /** |
| * Indicates whether this View is currently in edit mode. A View is usually |
| * in edit mode when displayed within a developer tool. For instance, if |
| * this View is being drawn by a visual user interface builder, this method |
| * should return true. |
| * |
| * Subclasses should check the return value of this method to provide |
| * different behaviors if their normal behavior might interfere with the |
| * host environment. For instance: the class spawns a thread in its |
| * constructor, the drawing code relies on device-specific features, etc. |
| * |
| * This method is usually checked in the drawing code of custom widgets. |
| * |
| * @return True if this View is in edit mode, false otherwise. |
| */ |
| public boolean isInEditMode() { |
| return false; |
| } |
| |
| /** |
| * If the View draws content inside its padding and enables fading edges, |
| * it needs to support padding offsets. Padding offsets are added to the |
| * fading edges to extend the length of the fade so that it covers pixels |
| * drawn inside the padding. |
| * |
| * Subclasses of this class should override this method if they need |
| * to draw content inside the padding. |
| * |
| * @return True if padding offset must be applied, false otherwise. |
| * |
| * @see #getLeftPaddingOffset() |
| * @see #getRightPaddingOffset() |
| * @see #getTopPaddingOffset() |
| * @see #getBottomPaddingOffset() |
| * |
| * @since CURRENT |
| */ |
| protected boolean isPaddingOffsetRequired() { |
| return false; |
| } |
| |
| /** |
| * Amount by which to extend the left fading region. Called only when |
| * {@link #isPaddingOffsetRequired()} returns true. |
| * |
| * @return The left padding offset in pixels. |
| * |
| * @see #isPaddingOffsetRequired() |
| * |
| * @since CURRENT |
| */ |
| protected int getLeftPaddingOffset() { |
| return 0; |
| } |
| |
| /** |
| * Amount by which to extend the right fading region. Called only when |
| * {@link #isPaddingOffsetRequired()} returns true. |
| * |
| * @return The right padding offset in pixels. |
| * |
| * @see #isPaddingOffsetRequired() |
| * |
| * @since CURRENT |
| */ |
| protected int getRightPaddingOffset() { |
| return 0; |
| } |
| |
| /** |
| * Amount by which to extend the top fading region. Called only when |
| * {@link #isPaddingOffsetRequired()} returns true. |
| * |
| * @return The top padding offset in pixels. |
| * |
| * @see #isPaddingOffsetRequired() |
| * |
| * @since CURRENT |
| */ |
| protected int getTopPaddingOffset() { |
| return 0; |
| } |
| |
| /** |
| * Amount by which to extend the bottom fading region. Called only when |
| * {@link #isPaddingOffsetRequired()} returns true. |
| * |
| * @return The bottom padding offset in pixels. |
| * |
| * @see #isPaddingOffsetRequired() |
| * |
| * @since CURRENT |
| */ |
| protected int getBottomPaddingOffset() { |
| return 0; |
| } |
| |
| /** |
| * <p>Indicates whether this view is attached to an hardware accelerated |
| * window or not.</p> |
| * |
| * <p>Even if this method returns true, it does not mean that every call |
| * to {@link #draw(android.graphics.Canvas)} will be made with an hardware |
| * accelerated {@link android.graphics.Canvas}. For instance, if this view |
| * is drawn onto an offscren {@link android.graphics.Bitmap} and its |
| * window is hardware accelerated, |
| * {@link android.graphics.Canvas#isHardwareAccelerated()} will likely |
| * return false, and this method will return true.</p> |
| * |
| * @return True if the view is attached to a window and the window is |
| * hardware accelerated; false in any other case. |
| */ |
| public boolean isHardwareAccelerated() { |
| return mAttachInfo != null && mAttachInfo.mHardwareAccelerated; |
| } |
| |
| /** |
| * Manually render this view (and all of its children) to the given Canvas. |
| * The view must have already done a full layout before this function is |
| * called. When implementing a view, implement |
| * {@link #onDraw(android.graphics.Canvas)} instead of overriding this method. |
| * If you do need to override this method, call the superclass version. |
| * |
| * @param canvas The Canvas to which the View is rendered. |
| */ |
| public void draw(Canvas canvas) { |
| if (ViewDebug.TRACE_HIERARCHY) { |
| ViewDebug.trace(this, ViewDebug.HierarchyTraceType.DRAW); |
| } |
| |
| final int privateFlags = mPrivateFlags; |
| final boolean dirtyOpaque = (privateFlags & DIRTY_MASK) == DIRTY_OPAQUE && |
| (mAttachInfo == null || !mAttachInfo.mIgnoreDirtyState); |
| mPrivateFlags = (privateFlags & ~DIRTY_MASK) | DRAWN; |
| |
| /* |
| * Draw traversal performs several drawing steps which must be executed |
| * in the appropriate order: |
| * |
| * 1. Draw the background |
| * 2. If necessary, save the canvas' layers to prepare for fading |
| * 3. Draw view's content |
| * 4. Draw children |
| * 5. If necessary, draw the fading edges and restore layers |
| * 6. Draw decorations (scrollbars for instance) |
| */ |
| |
| // Step 1, draw the background, if needed |
| int saveCount; |
| |
| if (!dirtyOpaque) { |
| final Drawable background = mBGDrawable; |
| if (background != null) { |
| final int scrollX = mScrollX; |
| final int scrollY = mScrollY; |
| |
| if (mBackgroundSizeChanged) { |
| background.setBounds(0, 0, mRight - mLeft, mBottom - mTop); |
| mBackgroundSizeChanged = false; |
| } |
| |
| if ((scrollX | scrollY) == 0) { |
| background.draw(canvas); |
| } else { |
| canvas.translate(scrollX, scrollY); |
| background.draw(canvas); |
| canvas.translate(-scrollX, -scrollY); |
| } |
| } |
| } |
| |
| // skip step 2 & 5 if possible (common case) |
| final int viewFlags = mViewFlags; |
| boolean horizontalEdges = (viewFlags & FADING_EDGE_HORIZONTAL) != 0; |
| boolean verticalEdges = (viewFlags & FADING_EDGE_VERTICAL) != 0; |
| if (!verticalEdges && !horizontalEdges) { |
| // Step 3, draw the content |
| if (!dirtyOpaque) onDraw(canvas); |
| |
| // Step 4, draw the children |
| dispatchDraw(canvas); |
| |
| // Step 6, draw decorations (scrollbars) |
| onDrawScrollBars(canvas); |
| |
| // we're done... |
| return; |
| } |
| |
| /* |
| * Here we do the full fledged routine... |
| * (this is an uncommon case where speed matters less, |
| * this is why we repeat some of the tests that have been |
| * done above) |
| */ |
| |
| boolean drawTop = false; |
| boolean drawBottom = false; |
| boolean drawLeft = false; |
| boolean drawRight = false; |
| |
| float topFadeStrength = 0.0f; |
| float bottomFadeStrength = 0.0f; |
| float leftFadeStrength = 0.0f; |
| float rightFadeStrength = 0.0f; |
| |
| // Step 2, save the canvas' layers |
| int paddingLeft = mPaddingLeft; |
| int paddingTop = mPaddingTop; |
| |
| final boolean offsetRequired = isPaddingOffsetRequired(); |
| if (offsetRequired) { |
| paddingLeft += getLeftPaddingOffset(); |
| paddingTop += getTopPaddingOffset(); |
| } |
| |
| int left = mScrollX + paddingLeft; |
| int right = left + mRight - mLeft - mPaddingRight - paddingLeft; |
| int top = mScrollY + paddingTop; |
| int bottom = top + mBottom - mTop - mPaddingBottom - paddingTop; |
| |
| if (offsetRequired) { |
| right += getRightPaddingOffset(); |
| bottom += getBottomPaddingOffset(); |
| } |
| |
| final ScrollabilityCache scrollabilityCache = mScrollCache; |
| final float fadeHeight = scrollabilityCache.fadingEdgeLength; |
| int length = (int) fadeHeight; |
| |
| // clip the fade length if top and bottom fades overlap |
| // overlapping fades produce odd-looking artifacts |
| if (verticalEdges && (top + length > bottom - length)) { |
| length = (bottom - top) / 2; |
| } |
| |
| // also clip horizontal fades if necessary |
| if (horizontalEdges && (left + length > right - length)) { |
| length = (right - left) / 2; |
| } |
| |
| if (verticalEdges) { |
| topFadeStrength = Math.max(0.0f, Math.min(1.0f, getTopFadingEdgeStrength())); |
| drawTop = topFadeStrength * fadeHeight > 1.0f; |
| bottomFadeStrength = Math.max(0.0f, Math.min(1.0f, getBottomFadingEdgeStrength())); |
| drawBottom = bottomFadeStrength * fadeHeight > 1.0f; |
| } |
| |
| if (horizontalEdges) { |
| leftFadeStrength = Math.max(0.0f, Math.min(1.0f, getLeftFadingEdgeStrength())); |
| drawLeft = leftFadeStrength * fadeHeight > 1.0f; |
| rightFadeStrength = Math.max(0.0f, Math.min(1.0f, getRightFadingEdgeStrength())); |
| drawRight = rightFadeStrength * fadeHeight > 1.0f; |
| } |
| |
| saveCount = canvas.getSaveCount(); |
| |
| int solidColor = getSolidColor(); |
| if (solidColor == 0) { |
| final int flags = Canvas.HAS_ALPHA_LAYER_SAVE_FLAG; |
| |
| if (drawTop) { |
| canvas.saveLayer(left, top, right, top + length, null, flags); |
| } |
| |
| if (drawBottom) { |
| canvas.saveLayer(left, bottom - length, right, bottom, null, flags); |
| } |
| |
| if (drawLeft) { |
| canvas.saveLayer(left, top, left + length, bottom, null, flags); |
| } |
| |
| if (drawRight) { |
| canvas.saveLayer(right - length, top, right, bottom, null, flags); |
| } |
| } else { |
| scrollabilityCache.setFadeColor(solidColor); |
| } |
| |
| // Step 3, draw the content |
| if (!dirtyOpaque) onDraw(canvas); |
| |
| // Step 4, draw the children |
| dispatchDraw(canvas); |
| |
| // Step 5, draw the fade effect and restore layers |
| final Paint p = scrollabilityCache.paint; |
| final Matrix matrix = scrollabilityCache.matrix; |
| final Shader fade = scrollabilityCache.shader; |
| |
| if (drawTop) { |
| matrix.setScale(1, fadeHeight * topFadeStrength); |
| matrix.postTranslate(left, top); |
| fade.setLocalMatrix(matrix); |
| canvas.drawRect(left, top, right, top + length, p); |
| } |
| |
| if (drawBottom) { |
| matrix.setScale(1, fadeHeight * bottomFadeStrength); |
| matrix.postRotate(180); |
| matrix.postTranslate(left, bottom); |
| fade.setLocalMatrix(matrix); |
| canvas.drawRect(left, bottom - length, right, bottom, p); |
| } |
| |
| if (drawLeft) { |
| matrix.setScale(1, fadeHeight * leftFadeStrength); |
| matrix.postRotate(-90); |
| matrix.postTranslate(left, top); |
| fade.setLocalMatrix(matrix); |
| canvas.drawRect(left, top, left + length, bottom, p); |
| } |
| |
| if (drawRight) { |
| matrix.setScale(1, fadeHeight * rightFadeStrength); |
| matrix.postRotate(90); |
| matrix.postTranslate(right, top); |
| fade.setLocalMatrix(matrix); |
| canvas.drawRect(right - length, top, right, bottom, p); |
| } |
| |
| canvas.restoreToCount(saveCount); |
| |
| // Step 6, draw decorations (scrollbars) |
| onDrawScrollBars(canvas); |
| } |
| |
| /** |
| * Override this if your view is known to always be drawn on top of a solid color background, |
| * and needs to draw fading edges. Returning a non-zero color enables the view system to |
| * optimize the drawing of the fading edges. If you do return a non-zero color, the alpha |
| * should be set to 0xFF. |
| * |
| * @see #setVerticalFadingEdgeEnabled(boolean) |
| * @see #setHorizontalFadingEdgeEnabled(boolean) |
| * |
| * @return The known solid color background for this view, or 0 if the color may vary |
| */ |
| @ViewDebug.ExportedProperty(category = "drawing") |
| public int getSolidColor() { |
| return 0; |
| } |
| |
| /** |
| * Build a human readable string representation of the specified view flags. |
| * |
| * @param flags the view flags to convert to a string |
| * @return a String representing the supplied flags |
| */ |
| private static String printFlags(int flags) { |
| String output = ""; |
| int numFlags = 0; |
| if ((flags & FOCUSABLE_MASK) == FOCUSABLE) { |
| output += "TAKES_FOCUS"; |
| numFlags++; |
| } |
| |
| switch (flags & VISIBILITY_MASK) { |
| case INVISIBLE: |
| if (numFlags > 0) { |
| output += " "; |
| } |
| output += "INVISIBLE"; |
| // USELESS HERE numFlags++; |
| break; |
| case GONE: |
| if (numFlags > 0) { |
| output += " "; |
| } |
| output += "GONE"; |
| // USELESS HERE numFlags++; |
| break; |
| default: |
| break; |
| } |
| return output; |
| } |
| |
| /** |
| * Build a human readable string representation of the specified private |
| * view flags. |
| * |
| * @param privateFlags the private view flags to convert to a string |
| * @return a String representing the supplied flags |
| */ |
| private static String printPrivateFlags(int privateFlags) { |
| String output = ""; |
| int numFlags = 0; |
| |
| if ((privateFlags & WANTS_FOCUS) == WANTS_FOCUS) { |
| output += "WANTS_FOCUS"; |
| numFlags++; |
| } |
| |
| if ((privateFlags & FOCUSED) == FOCUSED) { |
| if (numFlags > 0) { |
| output += " "; |
| } |
| output += "FOCUSED"; |
| numFlags++; |
| } |
| |
| if ((privateFlags & SELECTED) == SELECTED) { |
| if (numFlags > 0) { |
| output += " "; |
| } |
| output += "SELECTED"; |
| numFlags++; |
| } |
| |
| if ((privateFlags & IS_ROOT_NAMESPACE) == IS_ROOT_NAMESPACE) { |
| if (numFlags > 0) { |
| output += " "; |
| } |
| output += "IS_ROOT_NAMESPACE"; |
| numFlags++; |
| } |
| |
| if ((privateFlags & HAS_BOUNDS) == HAS_BOUNDS) { |
| if (numFlags > 0) { |
| output += " "; |
| } |
| output += "HAS_BOUNDS"; |
| numFlags++; |
| } |
| |
| if ((privateFlags & DRAWN) == DRAWN) { |
| if (numFlags > 0) { |
| output += " "; |
| } |
| output += "DRAWN"; |
| // USELESS HERE numFlags++; |
| } |
| return output; |
| } |
| |
| /** |
| * <p>Indicates whether or not this view's layout will be requested during |
| * the next hierarchy layout pass.</p> |
| * |
| * @return true if the layout will be forced during next layout pass |
| */ |
| public boolean isLayoutRequested() { |
| return (mPrivateFlags & FORCE_LAYOUT) == FORCE_LAYOUT; |
| } |
| |
| /** |
| * Assign a size and position to a view and all of its |
| * descendants |
| * |
| * <p>This is the second phase of the layout mechanism. |
| * (The first is measuring). In this phase, each parent calls |
| * layout on all of its children to position them. |
| * This is typically done using the child measurements |
| * that were stored in the measure pass().</p> |
| * |
| * <p>Derived classes should not override this method. |
| * Derived classes with children should override |
| * onLayout. In that method, they should |
| * call layout on each of their children.</p> |
| * |
| * @param l Left position, relative to parent |
| * @param t Top position, relative to parent |
| * @param r Right position, relative to parent |
| * @param b Bottom position, relative to parent |
| */ |
| @SuppressWarnings({"unchecked"}) |
| public void layout(int l, int t, int r, int b) { |
| int oldL = mLeft; |
| int oldT = mTop; |
| int oldB = mBottom; |
| int oldR = mRight; |
| boolean changed = setFrame(l, t, r, b); |
| if (changed || (mPrivateFlags & LAYOUT_REQUIRED) == LAYOUT_REQUIRED) { |
| if (ViewDebug.TRACE_HIERARCHY) { |
| ViewDebug.trace(this, ViewDebug.HierarchyTraceType.ON_LAYOUT); |
| } |
| |
| onLayout(changed, l, t, r, b); |
| mPrivateFlags &= ~LAYOUT_REQUIRED; |
| |
| if (mOnLayoutChangeListeners != null) { |
| ArrayList<OnLayoutChangeListener> listenersCopy = |
| (ArrayList<OnLayoutChangeListener>) mOnLayoutChangeListeners.clone(); |
| int numListeners = listenersCopy.size(); |
| for (int i = 0; i < numListeners; ++i) { |
| listenersCopy.get(i).onLayoutChange(this, l, t, r, b, oldL, oldT, oldR, oldB); |
| } |
| } |
| } |
| mPrivateFlags &= ~FORCE_LAYOUT; |
| } |
| |
| /** |
| * Called from layout when this view should |
| * assign a size and position to each of its children. |
| * |
| * Derived classes with children should override |
| * this method and call layout on each of |
| * their children. |
| * @param changed This is a new size or position for this view |
| * @param left Left position, relative to parent |
| * @param top Top position, relative to parent |
| * @param right Right position, relative to parent |
| * @param bottom Bottom position, relative to parent |
| */ |
| protected void onLayout(boolean changed, int left, int top, int right, int bottom) { |
| } |
| |
| /** |
| * Assign a size and position to this view. |
| * |
| * This is called from layout. |
| * |
| * @param left Left position, relative to parent |
| * @param top Top position, relative to parent |
| * @param right Right position, relative to parent |
| * @param bottom Bottom position, relative to parent |
| * @return true if the new size and position are different than the |
| * previous ones |
| * {@hide} |
| */ |
| protected boolean setFrame(int left, int top, int right, int bottom) { |
| boolean changed = false; |
| |
| if (DBG) { |
| Log.d("View", this + " View.setFrame(" + left + "," + top + "," |
| + right + "," + bottom + ")"); |
| } |
| |
| if (mLeft != left || mRight != right || mTop != top || mBottom != bottom) { |
| changed = true; |
| |
| // Remember our drawn bit |
| int drawn = mPrivateFlags & DRAWN; |
| |
| // Invalidate our old position |
| invalidate(true); |
| |
| |
| int oldWidth = mRight - mLeft; |
| int oldHeight = mBottom - mTop; |
| |
| mLeft = left; |
| mTop = top; |
| mRight = right; |
| mBottom = bottom; |
| |
| mPrivateFlags |= HAS_BOUNDS; |
| |
| int newWidth = right - left; |
| int newHeight = bottom - top; |
| |
| if (newWidth != oldWidth || newHeight != oldHeight) { |
| if ((mPrivateFlags & PIVOT_EXPLICITLY_SET) == 0) { |
| // A change in dimension means an auto-centered pivot point changes, too |
| mMatrixDirty = true; |
| } |
| onSizeChanged(newWidth, newHeight, oldWidth, oldHeight); |
| } |
| |
| if ((mViewFlags & VISIBILITY_MASK) == VISIBLE) { |
| // If we are visible, force the DRAWN bit to on so that |
| // this invalidate will go through (at least to our parent). |
| // This is because someone may have invalidated this view |
| // before this call to setFrame came in, thereby clearing |
| // the DRAWN bit. |
| mPrivateFlags |= DRAWN; |
| invalidate(true); |
| // parent display list may need to be recreated based on a change in the bounds |
| // of any child |
| invalidateParentCaches(); |
| } |
| |
| // Reset drawn bit to original value (invalidate turns it off) |
| mPrivateFlags |= drawn; |
| |
| mBackgroundSizeChanged = true; |
| } |
| return changed; |
| } |
| |
| /** |
| * Finalize inflating a view from XML. This is called as the last phase |
| * of inflation, after all child views have been added. |
| * |
| * <p>Even if the subclass overrides onFinishInflate, they should always be |
| * sure to call the super method, so that we get called. |
| */ |
| protected void onFinishInflate() { |
| } |
| |
| /** |
| * Returns the resources associated with this view. |
| * |
| * @return Resources object. |
| */ |
| public Resources getResources() { |
| return mResources; |
| } |
| |
| /** |
| * Invalidates the specified Drawable. |
| * |
| * @param drawable the drawable to invalidate |
| */ |
| public void invalidateDrawable(Drawable drawable) { |
| if (verifyDrawable(drawable)) { |
| final Rect dirty = drawable.getBounds(); |
| final int scrollX = mScrollX; |
| final int scrollY = mScrollY; |
| |
| invalidate(dirty.left + scrollX, dirty.top + scrollY, |
| dirty.right + scrollX, dirty.bottom + scrollY); |
| } |
| } |
| |
| /** |
| * Schedules an action on a drawable to occur at a specified time. |
| * |
| * @param who the recipient of the action |
| * @param what the action to run on the drawable |
| * @param when the time at which the action must occur. Uses the |
| * {@link SystemClock#uptimeMillis} timebase. |
| */ |
| public void scheduleDrawable(Drawable who, Runnable what, long when) { |
| if (verifyDrawable(who) && what != null && mAttachInfo != null) { |
| mAttachInfo.mHandler.postAtTime(what, who, when); |
| } |
| } |
| |
| /** |
| * Cancels a scheduled action on a drawable. |
| * |
| * @param who the recipient of the action |
| * @param what the action to cancel |
| */ |
| public void unscheduleDrawable(Drawable who, Runnable what) { |
| if (verifyDrawable(who) && what != null && mAttachInfo != null) { |
| mAttachInfo.mHandler.removeCallbacks(what, who); |
| } |
| } |
| |
| /** |
| * Unschedule any events associated with the given Drawable. This can be |
| * used when selecting a new Drawable into a view, so that the previous |
| * one is completely unscheduled. |
| * |
| * @param who The Drawable to unschedule. |
| * |
| * @see #drawableStateChanged |
| */ |
| public void unscheduleDrawable(Drawable who) { |
| if (mAttachInfo != null) { |
| mAttachInfo.mHandler.removeCallbacksAndMessages(who); |
| } |
| } |
| |
| /** |
| * Return the layout direction of a given Drawable. |
| * |
| * @param who the Drawable to query |
| * |
| * @hide |
| */ |
| public int getResolvedLayoutDirection(Drawable who) { |
| return (who == mBGDrawable) ? getResolvedLayoutDirection() : LAYOUT_DIRECTION_DEFAULT; |
| } |
| |
| /** |
| * If your view subclass is displaying its own Drawable objects, it should |
| * override this function and return true for any Drawable it is |
| * displaying. This allows animations for those drawables to be |
| * scheduled. |
| * |
| * <p>Be sure to call through to the super class when overriding this |
| * function. |
| * |
| * @param who The Drawable to verify. Return true if it is one you are |
| * displaying, else return the result of calling through to the |
| * super class. |
| * |
| * @return boolean If true than the Drawable is being displayed in the |
| * view; else false and it is not allowed to animate. |
| * |
| * @see #unscheduleDrawable(android.graphics.drawable.Drawable) |
| * @see #drawableStateChanged() |
| */ |
| protected boolean verifyDrawable(Drawable who) { |
| return who == mBGDrawable; |
| } |
| |
| /** |
| * This function is called whenever the state of the view changes in such |
| * a way that it impacts the state of drawables being shown. |
| * |
| * <p>Be sure to call through to the superclass when overriding this |
| * function. |
| * |
| * @see Drawable#setState(int[]) |
| */ |
| protected void drawableStateChanged() { |
| Drawable d = mBGDrawable; |
| if (d != null && d.isStateful()) { |
| d.setState(getDrawableState()); |
| } |
| } |
| |
| /** |
| * Call this to force a view to update its drawable state. This will cause |
| * drawableStateChanged to be called on this view. Views that are interested |
| * in the new state should call getDrawableState. |
| * |
| * @see #drawableStateChanged |
| * @see #getDrawableState |
| */ |
| public void refreshDrawableState() { |
| mPrivateFlags |= DRAWABLE_STATE_DIRTY; |
| drawableStateChanged(); |
| |
| ViewParent parent = mParent; |
| if (parent != null) { |
| parent.childDrawableStateChanged(this); |
| } |
| } |
| |
| /** |
| * Return an array of resource IDs of the drawable states representing the |
| * current state of the view. |
| * |
| * @return The current drawable state |
| * |
| * @see Drawable#setState(int[]) |
| * @see #drawableStateChanged() |
| * @see #onCreateDrawableState(int) |
| */ |
| public final int[] getDrawableState() { |
| if ((mDrawableState != null) && ((mPrivateFlags & DRAWABLE_STATE_DIRTY) == 0)) { |
| return mDrawableState; |
| } else { |
| mDrawableState = onCreateDrawableState(0); |
| mPrivateFlags &= ~DRAWABLE_STATE_DIRTY; |
| return mDrawableState; |
| } |
| } |
| |
| /** |
| * Generate the new {@link android.graphics.drawable.Drawable} state for |
| * this view. This is called by the view |
| * system when the cached Drawable state is determined to be invalid. To |
| * retrieve the current state, you should use {@link #getDrawableState}. |
| * |
| * @param extraSpace if non-zero, this is the number of extra entries you |
| * would like in the returned array in which you can place your own |
| * states. |
| * |
| * @return Returns an array holding the current {@link Drawable} state of |
| * the view. |
| * |
| * @see #mergeDrawableStates(int[], int[]) |
| */ |
| protected int[] onCreateDrawableState(int extraSpace) { |
| if ((mViewFlags & DUPLICATE_PARENT_STATE) == DUPLICATE_PARENT_STATE && |
| mParent instanceof View) { |
| return ((View) mParent).onCreateDrawableState(extraSpace); |
| } |
| |
| int[] drawableState; |
| |
| int privateFlags = mPrivateFlags; |
| |
| int viewStateIndex = 0; |
| if ((privateFlags & PRESSED) != 0) viewStateIndex |= VIEW_STATE_PRESSED; |
| if ((mViewFlags & ENABLED_MASK) == ENABLED) viewStateIndex |= VIEW_STATE_ENABLED; |
| if (isFocused()) viewStateIndex |= VIEW_STATE_FOCUSED; |
| if ((privateFlags & SELECTED) != 0) viewStateIndex |= VIEW_STATE_SELECTED; |
| if (hasWindowFocus()) viewStateIndex |= VIEW_STATE_WINDOW_FOCUSED; |
| if ((privateFlags & ACTIVATED) != 0) viewStateIndex |= VIEW_STATE_ACTIVATED; |
| if (mAttachInfo != null && mAttachInfo.mHardwareAccelerationRequested && |
| HardwareRenderer.isAvailable()) { |
| // This is set if HW acceleration is requested, even if the current |
| // process doesn't allow it. This is just to allow app preview |
| // windows to better match their app. |
| viewStateIndex |= VIEW_STATE_ACCELERATED; |
| } |
| if ((privateFlags & HOVERED) != 0) viewStateIndex |= VIEW_STATE_HOVERED; |
| |
| final int privateFlags2 = mPrivateFlags2; |
| if ((privateFlags2 & DRAG_CAN_ACCEPT) != 0) viewStateIndex |= VIEW_STATE_DRAG_CAN_ACCEPT; |
| if ((privateFlags2 & DRAG_HOVERED) != 0) viewStateIndex |= VIEW_STATE_DRAG_HOVERED; |
| |
| drawableState = VIEW_STATE_SETS[viewStateIndex]; |
| |
| //noinspection ConstantIfStatement |
| if (false) { |
| Log.i("View", "drawableStateIndex=" + viewStateIndex); |
| Log.i("View", toString() |
| + " pressed=" + ((privateFlags & PRESSED) != 0) |
| + " en=" + ((mViewFlags & ENABLED_MASK) == ENABLED) |
| + " fo=" + hasFocus() |
| + " sl=" + ((privateFlags & SELECTED) != 0) |
| + " wf=" + hasWindowFocus() |
| + ": " + Arrays.toString(drawableState)); |
| } |
| |
| if (extraSpace == 0) { |
| return drawableState; |
| } |
| |
| final int[] fullState; |
| if (drawableState != null) { |
| fullState = new int[drawableState.length + extraSpace]; |
| System.arraycopy(drawableState, 0, fullState, 0, drawableState.length); |
| } else { |
| fullState = new int[extraSpace]; |
| } |
| |
| return fullState; |
| } |
| |
| /** |
| * Merge your own state values in <var>additionalState</var> into the base |
| * state values <var>baseState</var> that were returned by |
| * {@link #onCreateDrawableState(int)}. |
| * |
| * @param baseState The base state values returned by |
| * {@link #onCreateDrawableState(int)}, which will be modified to also hold your |
| * own additional state values. |
| * |
| * @param additionalState The additional state values you would like |
| * added to <var>baseState</var>; this array is not modified. |
| * |
| * @return As a convenience, the <var>baseState</var> array you originally |
| * passed into the function is returned. |
| * |
| * @see #onCreateDrawableState(int) |
| */ |
| protected static int[] mergeDrawableStates(int[] baseState, int[] additionalState) { |
| final int N = baseState.length; |
| int i = N - 1; |
| while (i >= 0 && baseState[i] == 0) { |
| i--; |
| } |
| System.arraycopy(additionalState, 0, baseState, i + 1, additionalState.length); |
| return baseState; |
| } |
| |
| /** |
| * Call {@link Drawable#jumpToCurrentState() Drawable.jumpToCurrentState()} |
| * on all Drawable objects associated with this view. |
| */ |
| public void jumpDrawablesToCurrentState() { |
| if (mBGDrawable != null) { |
| mBGDrawable.jumpToCurrentState(); |
| } |
| } |
| |
| /** |
| * Sets the background color for this view. |
| * @param color the color of the background |
| */ |
| @RemotableViewMethod |
| public void setBackgroundColor(int color) { |
| if (mBGDrawable instanceof ColorDrawable) { |
| ((ColorDrawable) mBGDrawable).setColor(color); |
| } else { |
| setBackgroundDrawable(new ColorDrawable(color)); |
| } |
| } |
| |
| /** |
| * Set the background to a given resource. The resource should refer to |
| * a Drawable object or 0 to remove the background. |
| * @param resid The identifier of the resource. |
| * @attr ref android.R.styleable#View_background |
| */ |
| @RemotableViewMethod |
| public void setBackgroundResource(int resid) { |
| if (resid != 0 && resid == mBackgroundResource) { |
| return; |
| } |
| |
| Drawable d= null; |
| if (resid != 0) { |
| d = mResources.getDrawable(resid); |
| } |
| setBackgroundDrawable(d); |
| |
| mBackgroundResource = resid; |
| } |
| |
| /** |
| * Set the background to a given Drawable, or remove the background. If the |
| * background has padding, this View's padding is set to the background's |
| * padding. However, when a background is removed, this View's padding isn't |
| * touched. If setting the padding is desired, please use |
| * {@link #setPadding(int, int, int, int)}. |
| * |
| * @param d The Drawable to use as the background, or null to remove the |
| * background |
| */ |
| public void setBackgroundDrawable(Drawable d) { |
| boolean requestLayout = false; |
| |
| mBackgroundResource = 0; |
| |
| /* |
| * Regardless of whether we're setting a new background or not, we want |
| * to clear the previous drawable. |
| */ |
| if (mBGDrawable != null) { |
| mBGDrawable.setCallback(null); |
| unscheduleDrawable(mBGDrawable); |
| } |
| |
| if (d != null) { |
| Rect padding = sThreadLocal.get(); |
| if (padding == null) { |
| padding = new Rect(); |
| sThreadLocal.set(padding); |
| } |
| if (d.getPadding(padding)) { |
| switch (d.getResolvedLayoutDirectionSelf()) { |
| case LAYOUT_DIRECTION_RTL: |
| setPadding(padding.right, padding.top, padding.left, padding.bottom); |
| break; |
| case LAYOUT_DIRECTION_LTR: |
| default: |
| setPadding(padding.left, padding.top, padding.right, padding.bottom); |
| } |
| } |
| |
| // Compare the minimum sizes of the old Drawable and the new. If there isn't an old or |
| // if it has a different minimum size, we should layout again |
| if (mBGDrawable == null || mBGDrawable.getMinimumHeight() != d.getMinimumHeight() || |
| mBGDrawable.getMinimumWidth() != d.getMinimumWidth()) { |
| requestLayout = true; |
| } |
| |
| d.setCallback(this); |
| if (d.isStateful()) { |
| d.setState(getDrawableState()); |
| } |
| d.setVisible(getVisibility() == VISIBLE, false); |
| mBGDrawable = d; |
| |
| if ((mPrivateFlags & SKIP_DRAW) != 0) { |
| mPrivateFlags &= ~SKIP_DRAW; |
| mPrivateFlags |= ONLY_DRAWS_BACKGROUND; |
| requestLayout = true; |
| } |
| } else { |
| /* Remove the background */ |
| mBGDrawable = null; |
| |
| if ((mPrivateFlags & ONLY_DRAWS_BACKGROUND) != 0) { |
| /* |
| * This view ONLY drew the background before and we're removing |
| * the background, so now it won't draw anything |
| * (hence we SKIP_DRAW) |
| */ |
| mPrivateFlags &= ~ONLY_DRAWS_BACKGROUND; |
| mPrivateFlags |= SKIP_DRAW; |
| } |
| |
| /* |
| * When the background is set, we try to apply its padding to this |
| * View. When the background is removed, we don't touch this View's |
| * padding. This is noted in the Javadocs. Hence, we don't need to |
| * requestLayout(), the invalidate() below is sufficient. |
| */ |
| |
| // The old background's minimum size could have affected this |
| // View's layout, so let's requestLayout |
| requestLayout = true; |
| } |
| |
| computeOpaqueFlags(); |
| |
| if (requestLayout) { |
| requestLayout(); |
| } |
| |
| mBackgroundSizeChanged = true; |
| invalidate(true); |
| } |
| |
| /** |
| * Gets the background drawable |
| * @return The drawable used as the background for this view, if any. |
| */ |
| public Drawable getBackground() { |
| return mBGDrawable; |
| } |
| |
| /** |
| * Sets the padding. The view may add on the space required to display |
| * the scrollbars, depending on the style and visibility of the scrollbars. |
| * So the values returned from {@link #getPaddingLeft}, {@link #getPaddingTop}, |
| * {@link #getPaddingRight} and {@link #getPaddingBottom} may be different |
| * from the values set in this call. |
| * |
| * @attr ref android.R.styleable#View_padding |
| * @attr ref android.R.styleable#View_paddingBottom |
| * @attr ref android.R.styleable#View_paddingLeft |
| * @attr ref android.R.styleable#View_paddingRight |
| * @attr ref android.R.styleable#View_paddingTop |
| * @param left the left padding in pixels |
| * @param top the top padding in pixels |
| * @param right the right padding in pixels |
| * @param bottom the bottom padding in pixels |
| */ |
| public void setPadding(int left, int top, int right, int bottom) { |
| boolean changed = false; |
| |
| mUserPaddingRelative = false; |
| |
| mUserPaddingLeft = left; |
| mUserPaddingRight = right; |
| mUserPaddingBottom = bottom; |
| |
| final int viewFlags = mViewFlags; |
| |
| // Common case is there are no scroll bars. |
| if ((viewFlags & (SCROLLBARS_VERTICAL|SCROLLBARS_HORIZONTAL)) != 0) { |
| if ((viewFlags & SCROLLBARS_VERTICAL) != 0) { |
| final int offset = (viewFlags & SCROLLBARS_INSET_MASK) == 0 |
| ? 0 : getVerticalScrollbarWidth(); |
| switch (mVerticalScrollbarPosition) { |
| case SCROLLBAR_POSITION_DEFAULT: |
| if (getResolvedLayoutDirection() == LAYOUT_DIRECTION_RTL) { |
| left += offset; |
| } else { |
| right += offset; |
| } |
| break; |
| case SCROLLBAR_POSITION_RIGHT: |
| right += offset; |
| break; |
| case SCROLLBAR_POSITION_LEFT: |
| left += offset; |
| break; |
| } |
| } |
| if ((viewFlags & SCROLLBARS_HORIZONTAL) != 0) { |
| bottom += (viewFlags & SCROLLBARS_INSET_MASK) == 0 |
| ? 0 : getHorizontalScrollbarHeight(); |
| } |
| } |
| |
| if (mPaddingLeft != left) { |
| changed = true; |
| mPaddingLeft = left; |
| } |
| if (mPaddingTop != top) { |
| changed = true; |
| mPaddingTop = top; |
| } |
| if (mPaddingRight != right) { |
| changed = true; |
| mPaddingRight = right; |
| } |
| if (mPaddingBottom != bottom) { |
| changed = true; |
| mPaddingBottom = bottom; |
| } |
| |
| if (changed) { |
| requestLayout(); |
| } |
| } |
| |
| /** |
| * Sets the relative padding. The view may add on the space required to display |
| * the scrollbars, depending on the style and visibility of the scrollbars. |
| * So the values returned from {@link #getPaddingStart}, {@link #getPaddingTop}, |
| * {@link #getPaddingEnd} and {@link #getPaddingBottom} may be different |
| * from the values set in this call. |
| * |
| * @attr ref android.R.styleable#View_padding |
| * @attr ref android.R.styleable#View_paddingBottom |
| * @attr ref android.R.styleable#View_paddingStart |
| * @attr ref android.R.styleable#View_paddingEnd |
| * @attr ref android.R.styleable#View_paddingTop |
| * @param start the start padding in pixels |
| * @param top the top padding in pixels |
| * @param end the end padding in pixels |
| * @param bottom the bottom padding in pixels |
| * |
| * @hide |
| */ |
| public void setPaddingRelative(int start, int top, int end, int bottom) { |
| mUserPaddingRelative = true; |
| |
| mUserPaddingStart = start; |
| mUserPaddingEnd = end; |
| |
| switch(getResolvedLayoutDirection()) { |
| case LAYOUT_DIRECTION_RTL: |
| setPadding(end, top, start, bottom); |
| break; |
| case LAYOUT_DIRECTION_LTR: |
| default: |
| setPadding(start, top, end, bottom); |
| } |
| } |
| |
| /** |
| * Returns the top padding of this view. |
| * |
| * @return the top padding in pixels |
| */ |
| public int getPaddingTop() { |
| return mPaddingTop; |
| } |
| |
| /** |
| * Returns the bottom padding of this view. If there are inset and enabled |
| * scrollbars, this value may include the space required to display the |
| * scrollbars as well. |
| * |
| * @return the bottom padding in pixels |
| */ |
| public int getPaddingBottom() { |
| return mPaddingBottom; |
| } |
| |
| /** |
| * Returns the left padding of this view. If there are inset and enabled |
| * scrollbars, this value may include the space required to display the |
| * scrollbars as well. |
| * |
| * @return the left padding in pixels |
| */ |
| public int getPaddingLeft() { |
| return mPaddingLeft; |
| } |
| |
| /** |
| * Returns the start padding of this view. If there are inset and enabled |
| * scrollbars, this value may include the space required to display the |
| * scrollbars as well. |
| * |
| * @return the start padding in pixels |
| * |
| * @hide |
| */ |
| public int getPaddingStart() { |
| return (getResolvedLayoutDirection() == LAYOUT_DIRECTION_RTL) ? |
| mPaddingRight : mPaddingLeft; |
| } |
| |
| /** |
| * Returns the right padding of this view. If there are inset and enabled |
| * scrollbars, this value may include the space required to display the |
| * scrollbars as well. |
| * |
| * @return the right padding in pixels |
| */ |
| public int getPaddingRight() { |
| return mPaddingRight; |
| } |
| |
| /** |
| * Returns the end padding of this view. If there are inset and enabled |
| * scrollbars, this value may include the space required to display the |
| * scrollbars as well. |
| * |
| * @return the end padding in pixels |
| * |
| * @hide |
| */ |
| public int getPaddingEnd() { |
| return (getResolvedLayoutDirection() == LAYOUT_DIRECTION_RTL) ? |
| mPaddingLeft : mPaddingRight; |
| } |
| |
| /** |
| * Return if the padding as been set thru relative values |
| * {@link #setPaddingRelative(int, int, int, int)} or thru |
| * @attr ref android.R.styleable#View_paddingStart or |
| * @attr ref android.R.styleable#View_paddingEnd |
| * |
| * @return true if the padding is relative or false if it is not. |
| * |
| * @hide |
| */ |
| public boolean isPaddingRelative() { |
| return mUserPaddingRelative; |
| } |
| |
| /** |
| * Changes the selection state of this view. A view can be selected or not. |
| * Note that selection is not the same as focus. Views are typically |
| * selected in the context of an AdapterView like ListView or GridView; |
| * the selected view is the view that is highlighted. |
| * |
| * @param selected true if the view must be selected, false otherwise |
| */ |
| public void setSelected(boolean selected) { |
| if (((mPrivateFlags & SELECTED) != 0) != selected) { |
| mPrivateFlags = (mPrivateFlags & ~SELECTED) | (selected ? SELECTED : 0); |
| if (!selected) resetPressedState(); |
| invalidate(true); |
| refreshDrawableState(); |
| dispatchSetSelected(selected); |
| } |
| } |
| |
| /** |
| * Dispatch setSelected to all of this View's children. |
| * |
| * @see #setSelected(boolean) |
| * |
| * @param selected The new selected state |
| */ |
| protected void dispatchSetSelected(boolean selected) { |
| } |
| |
| /** |
| * Indicates the selection state of this view. |
| * |
| * @return true if the view is selected, false otherwise |
| */ |
| @ViewDebug.ExportedProperty |
| public boolean isSelected() { |
| return (mPrivateFlags & SELECTED) != 0; |
| } |
| |
| /** |
| * Changes the activated state of this view. A view can be activated or not. |
| * Note that activation is not the same as selection. Selection is |
| * a transient property, representing the view (hierarchy) the user is |
| * currently interacting with. Activation is a longer-term state that the |
| * user can move views in and out of. For example, in a list view with |
| * single or multiple selection enabled, the views in the current selection |
| * set are activated. (Um, yeah, we are deeply sorry about the terminology |
| * here.) The activated state is propagated down to children of the view it |
| * is set on. |
| * |
| * @param activated true if the view must be activated, false otherwise |
| */ |
| public void setActivated(boolean activated) { |
| if (((mPrivateFlags & ACTIVATED) != 0) != activated) { |
| mPrivateFlags = (mPrivateFlags & ~ACTIVATED) | (activated ? ACTIVATED : 0); |
| invalidate(true); |
| refreshDrawableState(); |
| dispatchSetActivated(activated); |
| } |
| } |
| |
| /** |
| * Dispatch setActivated to all of this View's children. |
| * |
| * @see #setActivated(boolean) |
| * |
| * @param activated The new activated state |
| */ |
| protected void dispatchSetActivated(boolean activated) { |
| } |
| |
| /** |
| * Indicates the activation state of this view. |
| * |
| * @return true if the view is activated, false otherwise |
| */ |
| @ViewDebug.ExportedProperty |
| public boolean isActivated() { |
| return (mPrivateFlags & ACTIVATED) != 0; |
| } |
| |
| /** |
| * Returns the ViewTreeObserver for this view's hierarchy. The view tree |
| * observer can be used to get notifications when global events, like |
| * layout, happen. |
| * |
| * The returned ViewTreeObserver observer is not guaranteed to remain |
| * valid for the lifetime of this View. If the caller of this method keeps |
| * a long-lived reference to ViewTreeObserver, it should always check for |
| * the return value of {@link ViewTreeObserver#isAlive()}. |
| * |
| * @return The ViewTreeObserver for this view's hierarchy. |
| */ |
| public ViewTreeObserver getViewTreeObserver() { |
| if (mAttachInfo != null) { |
| return mAttachInfo.mTreeObserver; |
| } |
| if (mFloatingTreeObserver == null) { |
| mFloatingTreeObserver = new ViewTreeObserver(); |
| } |
| return mFloatingTreeObserver; |
| } |
| |
| /** |
| * <p>Finds the topmost view in the current view hierarchy.</p> |
| * |
| * @return the topmost view containing this view |
| */ |
| public View getRootView() { |
| if (mAttachInfo != null) { |
| final View v = mAttachInfo.mRootView; |
| if (v != null) { |
| return v; |
| } |
| } |
| |
| View parent = this; |
| |
| while (parent.mParent != null && parent.mParent instanceof View) { |
| parent = (View) parent.mParent; |
| } |
| |
| return parent; |
| } |
| |
| /** |
| * <p>Computes the coordinates of this view on the screen. The argument |
| * must be an array of two integers. After the method returns, the array |
| * contains the x and y location in that order.</p> |
| * |
| * @param location an array of two integers in which to hold the coordinates |
| */ |
| public void getLocationOnScreen(int[] location) { |
| getLocationInWindow(location); |
| |
| final AttachInfo info = mAttachInfo; |
| if (info != null) { |
| location[0] += info.mWindowLeft; |
| location[1] += info.mWindowTop; |
| } |
| } |
| |
| /** |
| * <p>Computes the coordinates of this view in its window. The argument |
| * must be an array of two integers. After the method returns, the array |
| * contains the x and y location in that order.</p> |
| * |
| * @param location an array of two integers in which to hold the coordinates |
| */ |
| public void getLocationInWindow(int[] location) { |
| if (location == null || location.length < 2) { |
| throw new IllegalArgumentException("location must be an array of " |
| + "two integers"); |
| } |
| |
| location[0] = mLeft + (int) (mTranslationX + 0.5f); |
| location[1] = mTop + (int) (mTranslationY + 0.5f); |
| |
| ViewParent viewParent = mParent; |
| while (viewParent instanceof View) { |
| final View view = (View)viewParent; |
| location[0] += view.mLeft + (int) (view.mTranslationX + 0.5f) - view.mScrollX; |
| location[1] += view.mTop + (int) (view.mTranslationY + 0.5f) - view.mScrollY; |
| viewParent = view.mParent; |
| } |
| |
| if (viewParent instanceof ViewAncestor) { |
| // *cough* |
| final ViewAncestor vr = (ViewAncestor)viewParent; |
| location[1] -= vr.mCurScrollY; |
| } |
| } |
| |
| /** |
| * {@hide} |
| * @param id the id of the view to be found |
| * @return the view of the specified id, null if cannot be found |
| */ |
| protected View findViewTraversal(int id) { |
| if (id == mID) { |
| return this; |
| } |
| return null; |
| } |
| |
| /** |
| * {@hide} |
| * @param tag the tag of the view to be found |
| * @return the view of specified tag, null if cannot be found |
| */ |
| protected View findViewWithTagTraversal(Object tag) { |
| if (tag != null && tag.equals(mTag)) { |
| return this; |
| } |
| return null; |
| } |
| |
| /** |
| * {@hide} |
| * @param predicate The predicate to evaluate. |
| * @return The first view that matches the predicate or null. |
| */ |
| protected View findViewByPredicateTraversal(Predicate<View> predicate) { |
| if (predicate.apply(this)) { |
| return this; |
| } |
| return null; |
| } |
| |
| /** |
| * Look for a child view with the given id. If this view has the given |
| * id, return this view. |
| * |
| * @param id The id to search for. |
| * @return The view that has the given id in the hierarchy or null |
| */ |
| public final View findViewById(int id) { |
| if (id < 0) { |
| return null; |
| } |
| return findViewTraversal(id); |
| } |
| |
| /** |
| * Look for a child view with the given tag. If this view has the given |
| * tag, return this view. |
| * |
| * @param tag The tag to search for, using "tag.equals(getTag())". |
| * @return The View that has the given tag in the hierarchy or null |
| */ |
| public final View findViewWithTag(Object tag) { |
| if (tag == null) { |
| return null; |
| } |
| return findViewWithTagTraversal(tag); |
| } |
| |
| /** |
| * {@hide} |
| * Look for a child view that matches the specified predicate. |
| * If this view matches the predicate, return this view. |
| * |
| * @param predicate The predicate to evaluate. |
| * @return The first view that matches the predicate or null. |
| */ |
| public final View findViewByPredicate(Predicate<View> predicate) { |
| return findViewByPredicateTraversal(predicate); |
| } |
| |
| /** |
| * Sets the identifier for this view. The identifier does not have to be |
| * unique in this view's hierarchy. The identifier should be a positive |
| * number. |
| * |
| * @see #NO_ID |
| * @see #getId() |
| * @see #findViewById(int) |
| * |
| * @param id a number used to identify the view |
| * |
| * @attr ref android.R.styleable#View_id |
| */ |
| public void setId(int id) { |
| mID = id; |
| } |
| |
| /** |
| * {@hide} |
| * |
| * @param isRoot true if the view belongs to the root namespace, false |
| * otherwise |
| */ |
| public void setIsRootNamespace(boolean isRoot) { |
| if (isRoot) { |
| mPrivateFlags |= IS_ROOT_NAMESPACE; |
| } else { |
| mPrivateFlags &= ~IS_ROOT_NAMESPACE; |
| } |
| } |
| |
| /** |
| * {@hide} |
| * |
| * @return true if the view belongs to the root namespace, false otherwise |
| */ |
| public boolean isRootNamespace() { |
| return (mPrivateFlags&IS_ROOT_NAMESPACE) != 0; |
| } |
| |
| /** |
| * Returns this view's identifier. |
| * |
| * @return a positive integer used to identify the view or {@link #NO_ID} |
| * if the view has no ID |
| * |
| * @see #setId(int) |
| * @see #findViewById(int) |
| * @attr ref android.R.styleable#View_id |
| */ |
| @ViewDebug.CapturedViewProperty |
| public int getId() { |
| return mID; |
| } |
| |
| /** |
| * Returns this view's tag. |
| * |
| * @return the Object stored in this view as a tag |
| * |
| * @see #setTag(Object) |
| * @see #getTag(int) |
| */ |
| @ViewDebug.ExportedProperty |
| public Object getTag() { |
| return mTag; |
| } |
| |
| /** |
| * Sets the tag associated with this view. A tag can be used to mark |
| * a view in its hierarchy and does not have to be unique within the |
| * hierarchy. Tags can also be used to store data within a view without |
| * resorting to another data structure. |
| * |
| * @param tag an Object to tag the view with |
| * |
| * @see #getTag() |
| * @see #setTag(int, Object) |
| */ |
| public void setTag(final Object tag) { |
| mTag = tag; |
| } |
| |
| /** |
| * Returns the tag associated with this view and the specified key. |
| * |
| * @param key The key identifying the tag |
| * |
| * @return the Object stored in this view as a tag |
| * |
| * @see #setTag(int, Object) |
| * @see #getTag() |
| */ |
| public Object getTag(int key) { |
| SparseArray<Object> tags = null; |
| synchronized (sTagsLock) { |
| if (sTags != null) { |
| tags = sTags.get(this); |
| } |
| } |
| |
| if (tags != null) return tags.get(key); |
| return null; |
| } |
| |
| /** |
| * Sets a tag associated with this view and a key. A tag can be used |
| * to mark a view in its hierarchy and does not have to be unique within |
| * the hierarchy. Tags can also be used to store data within a view |
| * without resorting to another data structure. |
| * |
| * The specified key should be an id declared in the resources of the |
| * application to ensure it is unique (see the <a |
| * href={@docRoot}guide/topics/resources/more-resources.html#Id">ID resource type</a>). |
| * Keys identified as belonging to |
| * the Android framework or not associated with any package will cause |
| * an {@link IllegalArgumentException} to be thrown. |
| * |
| * @param key The key identifying the tag |
| * @param tag An Object to tag the view with |
| * |
| * @throws IllegalArgumentException If they specified key is not valid |
| * |
| * @see #setTag(Object) |
| * @see #getTag(int) |
| */ |
| public void setTag(int key, final Object tag) { |
| // If the package id is 0x00 or 0x01, it's either an undefined package |
| // or a framework id |
| if ((key >>> 24) < 2) { |
| throw new IllegalArgumentException("The key must be an application-specific " |
| + "resource id."); |
| } |
| |
| setTagInternal(this, key, tag); |
| } |
| |
| /** |
| * Variation of {@link #setTag(int, Object)} that enforces the key to be a |
| * framework id. |
| * |
| * @hide |
| */ |
| public void setTagInternal(int key, Object tag) { |
| if ((key >>> 24) != 0x1) { |
| throw new IllegalArgumentException("The key must be a framework-specific " |
| + "resource id."); |
| } |
| |
| setTagInternal(this, key, tag); |
| } |
| |
| private static void setTagInternal(View view, int key, Object tag) { |
| SparseArray<Object> tags = null; |
| synchronized (sTagsLock) { |
| if (sTags == null) { |
| sTags = new WeakHashMap<View, SparseArray<Object>>(); |
| } else { |
| tags = sTags.get(view); |
| } |
| } |
| |
| if (tags == null) { |
| tags = new SparseArray<Object>(2); |
| synchronized (sTagsLock) { |
| sTags.put(view, tags); |
| } |
| } |
| |
| tags.put(key, tag); |
| } |
| |
| /** |
| * @param consistency The type of consistency. See ViewDebug for more information. |
| * |
| * @hide |
| */ |
| protected boolean dispatchConsistencyCheck(int consistency) { |
| return onConsistencyCheck(consistency); |
| } |
| |
| /** |
| * Method that subclasses should implement to check their consistency. The type of |
| * consistency check is indicated by the bit field passed as a parameter. |
| * |
| * @param consistency The type of consistency. See ViewDebug for more information. |
| * |
| * @throws IllegalStateException if the view is in an inconsistent state. |
| * |
| * @hide |
| */ |
| protected boolean onConsistencyCheck(int consistency) { |
| boolean result = true; |
| |
| final boolean checkLayout = (consistency & ViewDebug.CONSISTENCY_LAYOUT) != 0; |
| final boolean checkDrawing = (consistency & ViewDebug.CONSISTENCY_DRAWING) != 0; |
| |
| if (checkLayout) { |
| if (getParent() == null) { |
| result = false; |
| android.util.Log.d(ViewDebug.CONSISTENCY_LOG_TAG, |
| "View " + this + " does not have a parent."); |
| } |
| |
| if (mAttachInfo == null) { |
| result = false; |
| android.util.Log.d(ViewDebug.CONSISTENCY_LOG_TAG, |
| "View " + this + " is not attached to a window."); |
| } |
| } |
| |
| if (checkDrawing) { |
| // Do not check the DIRTY/DRAWN flags because views can call invalidate() |
| // from their draw() method |
| |
| if ((mPrivateFlags & DRAWN) != DRAWN && |
| (mPrivateFlags & DRAWING_CACHE_VALID) == DRAWING_CACHE_VALID) { |
| result = false; |
| android.util.Log.d(ViewDebug.CONSISTENCY_LOG_TAG, |
| "View " + this + " was invalidated but its drawing cache is valid."); |
| } |
| } |
| |
| return result; |
| } |
| |
| /** |
| * Prints information about this view in the log output, with the tag |
| * {@link #VIEW_LOG_TAG}. |
| * |
| * @hide |
| */ |
| public void debug() { |
| debug(0); |
| } |
| |
| /** |
| * Prints information about this view in the log output, with the tag |
| * {@link #VIEW_LOG_TAG}. Each line in the output is preceded with an |
| * indentation defined by the <code>depth</code>. |
| * |
| * @param depth the indentation level |
| * |
| * @hide |
| */ |
| protected void debug(int depth) { |
| String output = debugIndent(depth - 1); |
| |
| output += "+ " + this; |
| int id = getId(); |
| if (id != -1) { |
| output += " (id=" + id + ")"; |
| } |
| Object tag = getTag(); |
| if (tag != null) { |
| output += " (tag=" + tag + ")"; |
| } |
| Log.d(VIEW_LOG_TAG, output); |
| |
| if ((mPrivateFlags & FOCUSED) != 0) { |
| output = debugIndent(depth) + " FOCUSED"; |
| Log.d(VIEW_LOG_TAG, output); |
| } |
| |
| output = debugIndent(depth); |
| output += "frame={" + mLeft + ", " + mTop + ", " + mRight |
| + ", " + mBottom + "} scroll={" + mScrollX + ", " + mScrollY |
| + "} "; |
| Log.d(VIEW_LOG_TAG, output); |
| |
| if (mPaddingLeft != 0 || mPaddingTop != 0 || mPaddingRight != 0 |
| || mPaddingBottom != 0) { |
| output = debugIndent(depth); |
| output += "padding={" + mPaddingLeft + ", " + mPaddingTop |
| + ", " + mPaddingRight + ", " + mPaddingBottom + "}"; |
| Log.d(VIEW_LOG_TAG, output); |
| } |
| |
| output = debugIndent(depth); |
| output += "mMeasureWidth=" + mMeasuredWidth + |
| " mMeasureHeight=" + mMeasuredHeight; |
| Log.d(VIEW_LOG_TAG, output); |
| |
| output = debugIndent(depth); |
| if (mLayoutParams == null) { |
| output += "BAD! no layout params"; |
| } else { |
| output = mLayoutParams.debug(output); |
| } |
| Log.d(VIEW_LOG_TAG, output); |
| |
| output = debugIndent(depth); |
| output += "flags={"; |
| output += View.printFlags(mViewFlags); |
| output += "}"; |
| Log.d(VIEW_LOG_TAG, output); |
| |
| output = debugIndent(depth); |
| output += "privateFlags={"; |
| output += View.printPrivateFlags(mPrivateFlags); |
| output += "}"; |
| Log.d(VIEW_LOG_TAG, output); |
| } |
| |
| /** |
| * Creates an string of whitespaces used for indentation. |
| * |
| * @param depth the indentation level |
| * @return a String containing (depth * 2 + 3) * 2 white spaces |
| * |
| * @hide |
| */ |
| protected static String debugIndent(int depth) { |
| StringBuilder spaces = new StringBuilder((depth * 2 + 3) * 2); |
| for (int i = 0; i < (depth * 2) + 3; i++) { |
| spaces.append(' ').append(' '); |
| } |
| return spaces.toString(); |
| } |
| |
| /** |
| * <p>Return the offset of the widget's text baseline from the widget's top |
| * boundary. If this widget does not support baseline alignment, this |
| * method returns -1. </p> |
| * |
| * @return the offset of the baseline within the widget's bounds or -1 |
| * if baseline alignment is not supported |
| */ |
| @ViewDebug.ExportedProperty(category = "layout") |
| public int getBaseline() { |
| return -1; |
| } |
| |
| /** |
| * Call this when something has changed which has invalidated the |
| * layout of this view. This will schedule a layout pass of the view |
| * tree. |
| */ |
| public void requestLayout() { |
| if (ViewDebug.TRACE_HIERARCHY) { |
| ViewDebug.trace(this, ViewDebug.HierarchyTraceType.REQUEST_LAYOUT); |
| } |
| |
| mPrivateFlags |= FORCE_LAYOUT; |
| mPrivateFlags |= INVALIDATED; |
| |
| if (mLayoutParams != null && mParent != null) { |
| mLayoutParams.resolveWithDirection(getResolvedLayoutDirection()); |
| } |
| |
| if (mParent != null && !mParent.isLayoutRequested()) { |
| mParent.requestLayout(); |
| } |
| } |
| |
| /** |
| * Forces this view to be laid out during the next layout pass. |
| * This method does not call requestLayout() or forceLayout() |
| * on the parent. |
| */ |
| public void forceLayout() { |
| mPrivateFlags |= FORCE_LAYOUT; |
| mPrivateFlags |= INVALIDATED; |
| } |
| |
| /** |
| * <p> |
| * This is called to find out how big a view should be. The parent |
| * supplies constraint information in the width and height parameters. |
| * </p> |
| * |
| * <p> |
| * The actual mesurement work of a view is performed in |
| * {@link #onMeasure(int, int)}, called by this method. Therefore, only |
| * {@link #onMeasure(int, int)} can and must be overriden by subclasses. |
| * </p> |
| * |
| * |
| * @param widthMeasureSpec Horizontal space requirements as imposed by the |
| * parent |
| * @param heightMeasureSpec Vertical space requirements as imposed by the |
| * parent |
| * |
| * @see #onMeasure(int, int) |
| */ |
| public final void measure(int widthMeasureSpec, int heightMeasureSpec) { |
| if ((mPrivateFlags & FORCE_LAYOUT) == FORCE_LAYOUT || |
| widthMeasureSpec != mOldWidthMeasureSpec || |
| heightMeasureSpec != mOldHeightMeasureSpec) { |
| |
| // first clears the measured dimension flag |
| mPrivateFlags &= ~MEASURED_DIMENSION_SET; |
| |
| if (ViewDebug.TRACE_HIERARCHY) { |
| ViewDebug.trace(this, ViewDebug.HierarchyTraceType.ON_MEASURE); |
| } |
| |
| // measure ourselves, this should set the measured dimension flag back |
| onMeasure(widthMeasureSpec, heightMeasureSpec); |
| |
| // flag not set, setMeasuredDimension() was not invoked, we raise |
| // an exception to warn the developer |
| if ((mPrivateFlags & MEASURED_DIMENSION_SET) != MEASURED_DIMENSION_SET) { |
| throw new IllegalStateException("onMeasure() did not set the" |
| + " measured dimension by calling" |
| + " setMeasuredDimension()"); |
| } |
| |
| mPrivateFlags |= LAYOUT_REQUIRED; |
| } |
| |
| mOldWidthMeasureSpec = widthMeasureSpec; |
| mOldHeightMeasureSpec = heightMeasureSpec; |
| } |
| |
| /** |
| * <p> |
| * Measure the view and its content to determine the measured width and the |
| * measured height. This method is invoked by {@link #measure(int, int)} and |
| * should be overriden by subclasses to provide accurate and efficient |
| * measurement of their contents. |
| * </p> |
| * |
| * <p> |
| * <strong>CONTRACT:</strong> When overriding this method, you |
| * <em>must</em> call {@link #setMeasuredDimension(int, int)} to store the |
| * measured width and height of this view. Failure to do so will trigger an |
| * <code>IllegalStateException</code>, thrown by |
| * {@link #measure(int, int)}. Calling the superclass' |
| * {@link #onMeasure(int, int)} is a valid use. |
| * </p> |
| * |
| * <p> |
| * The base class implementation of measure defaults to the background size, |
| * unless a larger size is allowed by the MeasureSpec. Subclasses should |
| * override {@link #onMeasure(int, int)} to provide better measurements of |
| * their content. |
| * </p> |
| * |
| * <p> |
| * If this method is overridden, it is the subclass's responsibility to make |
| * sure the measured height and width are at least the view's minimum height |
| * and width ({@link #getSuggestedMinimumHeight()} and |
| * {@link #getSuggestedMinimumWidth()}). |
| * </p> |
| * |
| * @param widthMeasureSpec horizontal space requirements as imposed by the parent. |
| * The requirements are encoded with |
| * {@link android.view.View.MeasureSpec}. |
| * @param heightMeasureSpec vertical space requirements as imposed by the parent. |
| * The requirements are encoded with |
| * {@link android.view.View.MeasureSpec}. |
| * |
| * @see #getMeasuredWidth() |
| * @see #getMeasuredHeight() |
| * @see #setMeasuredDimension(int, int) |
| * @see #getSuggestedMinimumHeight() |
| * @see #getSuggestedMinimumWidth() |
| * @see android.view.View.MeasureSpec#getMode(int) |
| * @see android.view.View.MeasureSpec#getSize(int) |
| */ |
| protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { |
| setMeasuredDimension(getDefaultSize(getSuggestedMinimumWidth(), widthMeasureSpec), |
| getDefaultSize(getSuggestedMinimumHeight(), heightMeasureSpec)); |
| } |
| |
| /** |
| * <p>This mehod must be called by {@link #onMeasure(int, int)} to store the |
| * measured width and measured height. Failing to do so will trigger an |
| * exception at measurement time.</p> |
| * |
| * @param measuredWidth The measured width of this view. May be a complex |
| * bit mask as defined by {@link #MEASURED_SIZE_MASK} and |
| * {@link #MEASURED_STATE_TOO_SMALL}. |
| * @param measuredHeight The measured height of this view. May be a complex |
| * bit mask as defined by {@link #MEASURED_SIZE_MASK} and |
| * {@link #MEASURED_STATE_TOO_SMALL}. |
| */ |
| protected final void setMeasuredDimension(int measuredWidth, int measuredHeight) { |
| mMeasuredWidth = measuredWidth; |
| mMeasuredHeight = measuredHeight; |
| |
| mPrivateFlags |= MEASURED_DIMENSION_SET; |
| } |
| |
| /** |
| * Merge two states as returned by {@link #getMeasuredState()}. |
| * @param curState The current state as returned from a view or the result |
| * of combining multiple views. |
| * @param newState The new view state to combine. |
| * @return Returns a new integer reflecting the combination of the two |
| * states. |
| */ |
| public static int combineMeasuredStates(int curState, int newState) { |
| return curState | newState; |
| } |
| |
| /** |
| * Version of {@link #resolveSizeAndState(int, int, int)} |
| * returning only the {@link #MEASURED_SIZE_MASK} bits of the result. |
| */ |
| public static int resolveSize(int size, int measureSpec) { |
| return resolveSizeAndState(size, measureSpec, 0) & MEASURED_SIZE_MASK; |
| } |
| |
| /** |
| * Utility to reconcile a desired size and state, with constraints imposed |
| * by a MeasureSpec. Will take the desired size, unless a different size |
| * is imposed by the constraints. The returned value is a compound integer, |
| * with the resolved size in the {@link #MEASURED_SIZE_MASK} bits and |
| * optionally the bit {@link #MEASURED_STATE_TOO_SMALL} set if the resulting |
| * size is smaller than the size the view wants to be. |
| * |
| * @param size How big the view wants to be |
| * @param measureSpec Constraints imposed by the parent |
| * @return Size information bit mask as defined by |
| * {@link #MEASURED_SIZE_MASK} and {@link #MEASURED_STATE_TOO_SMALL}. |
| */ |
| public static int resolveSizeAndState(int size, int measureSpec, int childMeasuredState) { |
| int result = size; |
| int specMode = MeasureSpec.getMode(measureSpec); |
| int specSize = MeasureSpec.getSize(measureSpec); |
| switch (specMode) { |
| case MeasureSpec.UNSPECIFIED: |
| result = size; |
| break; |
| case MeasureSpec.AT_MOST: |
| if (specSize < size) { |
| result = specSize | MEASURED_STATE_TOO_SMALL; |
| } else { |
| result = size; |
| } |
| break; |
| case MeasureSpec.EXACTLY: |
| result = specSize; |
| break; |
| } |
| return result | (childMeasuredState&MEASURED_STATE_MASK); |
| } |
| |
| /** |
| * Utility to return a default size. Uses the supplied size if the |
| * MeasureSpec imposed no constraints. Will get larger if allowed |
| * by the MeasureSpec. |
| * |
| * @param size Default size for this view |
| * @param measureSpec Constraints imposed by the parent |
| * @return The size this view should be. |
| */ |
| public static int getDefaultSize(int size, int measureSpec) { |
| int result = size; |
| int specMode = MeasureSpec.getMode(measureSpec); |
| int specSize = MeasureSpec.getSize(measureSpec); |
| |
| switch (specMode) { |
| case MeasureSpec.UNSPECIFIED: |
| result = size; |
| break; |
| case MeasureSpec.AT_MOST: |
| case MeasureSpec.EXACTLY: |
| result = specSize; |
| break; |
| } |
| return result; |
| } |
| |
| /** |
| * Returns the suggested minimum height that the view should use. This |
| * returns the maximum of the view's minimum height |
| * and the background's minimum height |
| * ({@link android.graphics.drawable.Drawable#getMinimumHeight()}). |
| * <p> |
| * When being used in {@link #onMeasure(int, int)}, the caller should still |
| * ensure the returned height is within the requirements of the parent. |
| * |
| * @return The suggested minimum height of the view. |
| */ |
| protected int getSuggestedMinimumHeight() { |
| int suggestedMinHeight = mMinHeight; |
| |
| if (mBGDrawable != null) { |
| final int bgMinHeight = mBGDrawable.getMinimumHeight(); |
| if (suggestedMinHeight < bgMinHeight) { |
| suggestedMinHeight = bgMinHeight; |
| } |
| } |
| |
| return suggestedMinHeight; |
| } |
| |
| /** |
| * Returns the suggested minimum width that the view should use. This |
| * returns the maximum of the view's minimum width) |
| * and the background's minimum width |
| * ({@link android.graphics.drawable.Drawable#getMinimumWidth()}). |
| * <p> |
| * When being used in {@link #onMeasure(int, int)}, the caller should still |
| * ensure the returned width is within the requirements of the parent. |
| * |
| * @return The suggested minimum width of the view. |
| */ |
| protected int getSuggestedMinimumWidth() { |
| int suggestedMinWidth = mMinWidth; |
| |
| if (mBGDrawable != null) { |
| final int bgMinWidth = mBGDrawable.getMinimumWidth(); |
| if (suggestedMinWidth < bgMinWidth) { |
| suggestedMinWidth = bgMinWidth; |
| } |
| } |
| |
| return suggestedMinWidth; |
| } |
| |
| /** |
| * Sets the minimum height of the view. It is not guaranteed the view will |
| * be able to achieve this minimum height (for example, if its parent layout |
| * constrains it with less available height). |
| * |
| * @param minHeight The minimum height the view will try to be. |
| */ |
| public void setMinimumHeight(int minHeight) { |
| mMinHeight = minHeight; |
| } |
| |
| /** |
| * Sets the minimum width of the view. It is not guaranteed the view will |
| * be able to achieve this minimum width (for example, if its parent layout |
| * constrains it with less available width). |
| * |
| * @param minWidth The minimum width the view will try to be. |
| */ |
| public void setMinimumWidth(int minWidth) { |
| mMinWidth = minWidth; |
| } |
| |
| /** |
| * Get the animation currently associated with this view. |
| * |
| * @return The animation that is currently playing or |
| * scheduled to play for this view. |
| */ |
| public Animation getAnimation() { |
| return mCurrentAnimation; |
| } |
| |
| /** |
| * Start the specified animation now. |
| * |
| * @param animation the animation to start now |
| */ |
| public void startAnimation(Animation animation) { |
| animation.setStartTime(Animation.START_ON_FIRST_FRAME); |
| setAnimation(animation); |
| invalidateParentCaches(); |
| invalidate(true); |
| } |
| |
| /** |
| * Cancels any animations for this view. |
| */ |
| public void clearAnimation() { |
| if (mCurrentAnimation != null) { |
| mCurrentAnimation.detach(); |
| } |
| mCurrentAnimation = null; |
| invalidateParentIfNeeded(); |
| } |
| |
| /** |
| * Sets the next animation to play for this view. |
| * If you want the animation to play immediately, use |
| * startAnimation. This method provides allows fine-grained |
| * control over the start time and invalidation, but you |
| * must make sure that 1) the animation has a start time set, and |
| * 2) the view will be invalidated when the animation is supposed to |
| * start. |
| * |
| * @param animation The next animation, or null. |
| */ |
| public void setAnimation(Animation animation) { |
| mCurrentAnimation = animation; |
| if (animation != null) { |
| animation.reset(); |
| } |
| } |
| |
| /** |
| * Invoked by a parent ViewGroup to notify the start of the animation |
| * currently associated with this view. If you override this method, |
| * always call super.onAnimationStart(); |
| * |
| * @see #setAnimation(android.view.animation.Animation) |
| * @see #getAnimation() |
| */ |
| protected void onAnimationStart() { |
| mPrivateFlags |= ANIMATION_STARTED; |
| } |
| |
| /** |
| * Invoked by a parent ViewGroup to notify the end of the animation |
| * currently associated with this view. If you override this method, |
| * always call super.onAnimationEnd(); |
| * |
| * @see #setAnimation(android.view.animation.Animation) |
| * @see #getAnimation() |
| */ |
| protected void onAnimationEnd() { |
| mPrivateFlags &= ~ANIMATION_STARTED; |
| } |
| |
| /** |
| * Invoked if there is a Transform that involves alpha. Subclass that can |
| * draw themselves with the specified alpha should return true, and then |
| * respect that alpha when their onDraw() is called. If this returns false |
| * then the view may be redirected to draw into an offscreen buffer to |
| * fulfill the request, which will look fine, but may be slower than if the |
| * subclass handles it internally. The default implementation returns false. |
| * |
| * @param alpha The alpha (0..255) to apply to the view's drawing |
| * @return true if the view can draw with the specified alpha. |
| */ |
| protected boolean onSetAlpha(int alpha) { |
| return false; |
| } |
| |
| /** |
| * This is used by the RootView to perform an optimization when |
| * the view hierarchy contains one or several SurfaceView. |
| * SurfaceView is always considered transparent, but its children are not, |
| * therefore all View objects remove themselves from the global transparent |
| * region (passed as a parameter to this function). |
| * |
| * @param region The transparent region for this ViewAncestor (window). |
| * |
| * @return Returns true if the effective visibility of the view at this |
| * point is opaque, regardless of the transparent region; returns false |
| * if it is possible for underlying windows to be seen behind the view. |
| * |
| * {@hide} |
| */ |
| public boolean gatherTransparentRegion(Region region) { |
| final AttachInfo attachInfo = mAttachInfo; |
| if (region != null && attachInfo != null) { |
| final int pflags = mPrivateFlags; |
| if ((pflags & SKIP_DRAW) == 0) { |
| // The SKIP_DRAW flag IS NOT set, so this view draws. We need to |
| // remove it from the transparent region. |
| final int[] location = attachInfo.mTransparentLocation; |
| getLocationInWindow(location); |
| region.op(location[0], location[1], location[0] + mRight - mLeft, |
| location[1] + mBottom - mTop, Region.Op.DIFFERENCE); |
| } else if ((pflags & ONLY_DRAWS_BACKGROUND) != 0 && mBGDrawable != null) { |
| // The ONLY_DRAWS_BACKGROUND flag IS set and the background drawable |
| // exists, so we remove the background drawable's non-transparent |
| // parts from this transparent region. |
| applyDrawableToTransparentRegion(mBGDrawable, region); |
| } |
| } |
| return true; |
| } |
| |
| /** |
| * Play a sound effect for this view. |
| * |
| * <p>The framework will play sound effects for some built in actions, such as |
| * clicking, but you may wish to play these effects in your widget, |
| * for instance, for internal navigation. |
| * |
| * <p>The sound effect will only be played if sound effects are enabled by the user, and |
| * {@link #isSoundEffectsEnabled()} is true. |
| * |
| * @param soundConstant One of the constants defined in {@link SoundEffectConstants} |
| */ |
| public void playSoundEffect(int soundConstant) { |
| if (mAttachInfo == null || mAttachInfo.mRootCallbacks == null || !isSoundEffectsEnabled()) { |
| return; |
| } |
| mAttachInfo.mRootCallbacks.playSoundEffect(soundConstant); |
| } |
| |
| /** |
| * BZZZTT!!1! |
| * |
| * <p>Provide haptic feedback to the user for this view. |
| * |
| * <p>The framework will provide haptic feedback for some built in actions, |
| * such as long presses, but you may wish to provide feedback for your |
| * own widget. |
| * |
| * <p>The feedback will only be performed if |
| * {@link #isHapticFeedbackEnabled()} is true. |
| * |
| * @param feedbackConstant One of the constants defined in |
| * {@link HapticFeedbackConstants} |
| */ |
| public boolean performHapticFeedback(int feedbackConstant) { |
| return performHapticFeedback(feedbackConstant, 0); |
| } |
| |
| /** |
| * BZZZTT!!1! |
| * |
| * <p>Like {@link #performHapticFeedback(int)}, with additional options. |
| * |
| * @param feedbackConstant One of the constants defined in |
| * {@link HapticFeedbackConstants} |
| * @param flags Additional flags as per {@link HapticFeedbackConstants}. |
| */ |
| public boolean performHapticFeedback(int feedbackConstant, int flags) { |
| if (mAttachInfo == null) { |
| return false; |
| } |
| //noinspection SimplifiableIfStatement |
| if ((flags & HapticFeedbackConstants.FLAG_IGNORE_VIEW_SETTING) == 0 |
| && !isHapticFeedbackEnabled()) { |
| return false; |
| } |
| return mAttachInfo.mRootCallbacks.performHapticFeedback(feedbackConstant, |
| (flags & HapticFeedbackConstants.FLAG_IGNORE_GLOBAL_SETTING) != 0); |
| } |
| |
| /** |
| * Request that the visibility of the status bar be changed. |
| * @param visibility Either {@link #STATUS_BAR_VISIBLE} or {@link #STATUS_BAR_HIDDEN}. |
| */ |
| public void setSystemUiVisibility(int visibility) { |
| if (visibility != mSystemUiVisibility) { |
| mSystemUiVisibility = visibility; |
| if (mParent != null && mAttachInfo != null && !mAttachInfo.mRecomputeGlobalAttributes) { |
| mParent.recomputeViewAttributes(this); |
| } |
| } |
| } |
| |
| /** |
| * Returns the status bar visibility that this view has requested. |
| * @return Either {@link #STATUS_BAR_VISIBLE} or {@link #STATUS_BAR_HIDDEN}. |
| */ |
| public int getSystemUiVisibility() { |
| return mSystemUiVisibility; |
| } |
| |
| /** |
| * Set a listener to receive callbacks when the visibility of the system bar changes. |
| * @param l The {@link OnSystemUiVisibilityChangeListener} to receive callbacks. |
| */ |
| public void setOnSystemUiVisibilityChangeListener(OnSystemUiVisibilityChangeListener l) { |
| mOnSystemUiVisibilityChangeListener = l; |
| if (mParent != null && mAttachInfo != null && !mAttachInfo.mRecomputeGlobalAttributes) { |
| mParent.recomputeViewAttributes(this); |
| } |
| } |
| |
| /** |
| */ |
| public void dispatchSystemUiVisibilityChanged(int visibility) { |
| if (mOnSystemUiVisibilityChangeListener != null) { |
| mOnSystemUiVisibilityChangeListener.onSystemUiVisibilityChange( |
| visibility & PUBLIC_STATUS_BAR_VISIBILITY_MASK); |
| } |
| } |
| |
| /** |
| * Creates an image that the system displays during the drag and drop |
| * operation. This is called a "drag shadow". The default implementation |
| * for a DragShadowBuilder based on a View returns an image that has exactly the same |
| * appearance as the given View. The default also positions the center of the drag shadow |
| * directly under the touch point. If no View is provided (the constructor with no parameters |
| * is used), and {@link #onProvideShadowMetrics(Point,Point) onProvideShadowMetrics()} and |
| * {@link #onDrawShadow(Canvas) onDrawShadow()} are not overriden, then the |
| * default is an invisible drag shadow. |
| * <p> |
| * You are not required to use the View you provide to the constructor as the basis of the |
| * drag shadow. The {@link #onDrawShadow(Canvas) onDrawShadow()} method allows you to draw |
| * anything you want as the drag shadow. |
| * </p> |
| * <p> |
| * You pass a DragShadowBuilder object to the system when you start the drag. The system |
| * calls {@link #onProvideShadowMetrics(Point,Point) onProvideShadowMetrics()} to get the |
| * size and position of the drag shadow. It uses this data to construct a |
| * {@link android.graphics.Canvas} object, then it calls {@link #onDrawShadow(Canvas) onDrawShadow()} |
| * so that your application can draw the shadow image in the Canvas. |
| * </p> |
| */ |
| public static class DragShadowBuilder { |
| private final WeakReference<View> mView; |
| |
| /** |
| * Constructs a shadow image builder based on a View. By default, the resulting drag |
| * shadow will have the same appearance and dimensions as the View, with the touch point |
| * over the center of the View. |
| * @param view A View. Any View in scope can be used. |
| */ |
| public DragShadowBuilder(View view) { |
| mView = new WeakReference<View>(view); |
| } |
| |
| /** |
| * Construct a shadow builder object with no associated View. This |
| * constructor variant is only useful when the {@link #onProvideShadowMetrics(Point, Point)} |
| * and {@link #onDrawShadow(Canvas)} methods are also overridden in order |
| * to supply the drag shadow's dimensions and appearance without |
| * reference to any View object. If they are not overridden, then the result is an |
| * invisible drag shadow. |
| */ |
| public DragShadowBuilder() { |
| mView = new WeakReference<View>(null); |
| } |
| |
| /** |
| * Returns the View object that had been passed to the |
| * {@link #View.DragShadowBuilder(View)} |
| * constructor. If that View parameter was {@code null} or if the |
| * {@link #View.DragShadowBuilder()} |
| * constructor was used to instantiate the builder object, this method will return |
| * null. |
| * |
| * @return The View object associate with this builder object. |
| */ |
| @SuppressWarnings({"JavadocReference"}) |
| final public View getView() { |
| return mView.get(); |
| } |
| |
| /** |
| * Provides the metrics for the shadow image. These include the dimensions of |
| * the shadow image, and the point within that shadow that should |
| * be centered under the touch location while dragging. |
| * <p> |
| * The default implementation sets the dimensions of the shadow to be the |
| * same as the dimensions of the View itself and centers the shadow under |
| * the touch point. |
| * </p> |
| * |
| * @param shadowSize A {@link android.graphics.Point} containing the width and height |
| * of the shadow image. Your application must set {@link android.graphics.Point#x} to the |
| * desired width and must set {@link android.graphics.Point#y} to the desired height of the |
| * image. |
| * |
| * @param shadowTouchPoint A {@link android.graphics.Point} for the position within the |
| * shadow image that should be underneath the touch point during the drag and drop |
| * operation. Your application must set {@link android.graphics.Point#x} to the |
| * X coordinate and {@link android.graphics.Point#y} to the Y coordinate of this position. |
| */ |
| public void onProvideShadowMetrics(Point shadowSize, Point shadowTouchPoint) { |
| final View view = mView.get(); |
| if (view != null) { |
| shadowSize.set(view.getWidth(), view.getHeight()); |
| shadowTouchPoint.set(shadowSize.x / 2, shadowSize.y / 2); |
| } else { |
| Log.e(View.VIEW_LOG_TAG, "Asked for drag thumb metrics but no view"); |
| } |
| } |
| |
| /** |
| * Draws the shadow image. The system creates the {@link android.graphics.Canvas} object |
| * based on the dimensions it received from the |
| * {@link #onProvideShadowMetrics(Point, Point)} callback. |
| * |
| * @param canvas A {@link android.graphics.Canvas} object in which to draw the shadow image. |
| */ |
| public void onDrawShadow(Canvas canvas) { |
| final View view = mView.get(); |
| if (view != null) { |
| view.draw(canvas); |
| } else { |
| Log.e(View.VIEW_LOG_TAG, "Asked to draw drag shadow but no view"); |
| } |
| } |
| } |
| |
| /** |
| * Starts a drag and drop operation. When your application calls this method, it passes a |
| * {@link android.view.View.DragShadowBuilder} object to the system. The |
| * system calls this object's {@link DragShadowBuilder#onProvideShadowMetrics(Point, Point)} |
| * to get metrics for the drag shadow, and then calls the object's |
| * {@link DragShadowBuilder#onDrawShadow(Canvas)} to draw the drag shadow itself. |
| * <p> |
| * Once the system has the drag shadow, it begins the drag and drop operation by sending |
| * drag events to all the View objects in your application that are currently visible. It does |
| * this either by calling the View object's drag listener (an implementation of |
| * {@link android.view.View.OnDragListener#onDrag(View,DragEvent) onDrag()} or by calling the |
| * View object's {@link android.view.View#onDragEvent(DragEvent) onDragEvent()} method. |
| * Both are passed a {@link android.view.DragEvent} object that has a |
| * {@link android.view.DragEvent#getAction()} value of |
| * {@link android.view.DragEvent#ACTION_DRAG_STARTED}. |
| * </p> |
| * <p> |
| * Your application can invoke startDrag() on any attached View object. The View object does not |
| * need to be the one used in {@link android.view.View.DragShadowBuilder}, nor does it need to |
| * be related to the View the user selected for dragging. |
| * </p> |
| * @param data A {@link android.content.ClipData} object pointing to the data to be |
| * transferred by the drag and drop operation. |
| * @param shadowBuilder A {@link android.view.View.DragShadowBuilder} object for building the |
| * drag shadow. |
| * @param myLocalState An {@link java.lang.Object} containing local data about the drag and |
| * drop operation. This Object is put into every DragEvent object sent by the system during the |
| * current drag. |
| * <p> |
| * myLocalState is a lightweight mechanism for the sending information from the dragged View |
| * to the target Views. For example, it can contain flags that differentiate between a |
| * a copy operation and a move operation. |
| * </p> |
| * @param flags Flags that control the drag and drop operation. No flags are currently defined, |
| * so the parameter should be set to 0. |
| * @return {@code true} if the method completes successfully, or |
| * {@code false} if it fails anywhere. Returning {@code false} means the system was unable to |
| * do a drag, and so no drag operation is in progress. |
| */ |
| public final boolean startDrag(ClipData data, DragShadowBuilder shadowBuilder, |
| Object myLocalState, int flags) { |
| if (ViewDebug.DEBUG_DRAG) { |
| Log.d(VIEW_LOG_TAG, "startDrag: data=" + data + " flags=" + flags); |
| } |
| boolean okay = false; |
| |
| Point shadowSize = new Point(); |
| Point shadowTouchPoint = new Point(); |
| shadowBuilder.onProvideShadowMetrics(shadowSize, shadowTouchPoint); |
| |
| if ((shadowSize.x < 0) || (shadowSize.y < 0) || |
| (shadowTouchPoint.x < 0) || (shadowTouchPoint.y < 0)) { |
| throw new IllegalStateException("Drag shadow dimensions must not be negative"); |
| } |
| |
| if (ViewDebug.DEBUG_DRAG) { |
| Log.d(VIEW_LOG_TAG, "drag shadow: width=" + shadowSize.x + " height=" + shadowSize.y |
| + " shadowX=" + shadowTouchPoint.x + " shadowY=" + shadowTouchPoint.y); |
| } |
| Surface surface = new Surface(); |
| try { |
| IBinder token = mAttachInfo.mSession.prepareDrag(mAttachInfo.mWindow, |
| flags, shadowSize.x, shadowSize.y, surface); |
| if (ViewDebug.DEBUG_DRAG) Log.d(VIEW_LOG_TAG, "prepareDrag returned token=" + token |
| + " surface=" + surface); |
| if (token != null) { |
| Canvas canvas = surface.lockCanvas(null); |
| try { |
| canvas.drawColor(0, PorterDuff.Mode.CLEAR); |
| shadowBuilder.onDrawShadow(canvas); |
| } finally { |
| surface.unlockCanvasAndPost(canvas); |
| } |
| |
| final ViewAncestor root = getViewAncestor(); |
| |
| // Cache the local state object for delivery with DragEvents |
| root.setLocalDragState(myLocalState); |
| |
| // repurpose 'shadowSize' for the last touch point |
| root.getLastTouchPoint(shadowSize); |
| |
| okay = mAttachInfo.mSession.performDrag(mAttachInfo.mWindow, token, |
| shadowSize.x, shadowSize.y, |
| shadowTouchPoint.x, shadowTouchPoint.y, data); |
| if (ViewDebug.DEBUG_DRAG) Log.d(VIEW_LOG_TAG, "performDrag returned " + okay); |
| } |
| } catch (Exception e) { |
| Log.e(VIEW_LOG_TAG, "Unable to initiate drag", e); |
| surface.destroy(); |
| } |
| |
| return okay; |
| } |
| |
| /** |
| * Handles drag events sent by the system following a call to |
| * {@link android.view.View#startDrag(ClipData,DragShadowBuilder,Object,int) startDrag()}. |
| *<p> |
| * When the system calls this method, it passes a |
| * {@link android.view.DragEvent} object. A call to |
| * {@link android.view.DragEvent#getAction()} returns one of the action type constants defined |
| * in DragEvent. The method uses these to determine what is happening in the drag and drop |
| * operation. |
| * @param event The {@link android.view.DragEvent} sent by the system. |
| * The {@link android.view.DragEvent#getAction()} method returns an action type constant defined |
| * in DragEvent, indicating the type of drag event represented by this object. |
| * @return {@code true} if the method was successful, otherwise {@code false}. |
| * <p> |
| * The method should return {@code true} in response to an action type of |
| * {@link android.view.DragEvent#ACTION_DRAG_STARTED} to receive drag events for the current |
| * operation. |
| * </p> |
| * <p> |
| * The method should also return {@code true} in response to an action type of |
| * {@link android.view.DragEvent#ACTION_DROP} if it consumed the drop, or |
| * {@code false} if it didn't. |
| * </p> |
| */ |
| public boolean onDragEvent(DragEvent event) { |
| return false; |
| } |
| |
| /** |
| * Detects if this View is enabled and has a drag event listener. |
| * If both are true, then it calls the drag event listener with the |
| * {@link android.view.DragEvent} it received. If the drag event listener returns |
| * {@code true}, then dispatchDragEvent() returns {@code true}. |
| * <p> |
| * For all other cases, the method calls the |
| * {@link android.view.View#onDragEvent(DragEvent) onDragEvent()} drag event handler |
| * method and returns its result. |
| * </p> |
| * <p> |
| * This ensures that a drag event is always consumed, even if the View does not have a drag |
| * event listener. However, if the View has a listener and the listener returns true, then |
| * onDragEvent() is not called. |
| * </p> |
| */ |
| public boolean dispatchDragEvent(DragEvent event) { |
| //noinspection SimplifiableIfStatement |
| if (mOnDragListener != null && (mViewFlags & ENABLED_MASK) == ENABLED |
| && mOnDragListener.onDrag(this, event)) { |
| return true; |
| } |
| return onDragEvent(event); |
| } |
| |
| boolean canAcceptDrag() { |
| return (mPrivateFlags2 & DRAG_CAN_ACCEPT) != 0; |
| } |
| |
| /** |
| * This needs to be a better API (NOT ON VIEW) before it is exposed. If |
| * it is ever exposed at all. |
| * @hide |
| */ |
| public void onCloseSystemDialogs(String reason) { |
| } |
| |
| /** |
| * Given a Drawable whose bounds have been set to draw into this view, |
| * update a Region being computed for |
| * {@link #gatherTransparentRegion(android.graphics.Region)} so |
| * that any non-transparent parts of the Drawable are removed from the |
| * given transparent region. |
| * |
| * @param dr The Drawable whose transparency is to be applied to the region. |
| * @param region A Region holding the current transparency information, |
| * where any parts of the region that are set are considered to be |
| * transparent. On return, this region will be modified to have the |
| * transparency information reduced by the corresponding parts of the |
| * Drawable that are not transparent. |
| * {@hide} |
| */ |
| public void applyDrawableToTransparentRegion(Drawable dr, Region region) { |
| if (DBG) { |
| Log.i("View", "Getting transparent region for: " + this); |
| } |
| final Region r = dr.getTransparentRegion(); |
| final Rect db = dr.getBounds(); |
| final AttachInfo attachInfo = mAttachInfo; |
| if (r != null && attachInfo != null) { |
| final int w = getRight()-getLeft(); |
| final int h = getBottom()-getTop(); |
| if (db.left > 0) { |
| //Log.i("VIEW", "Drawable left " + db.left + " > view 0"); |
| r.op(0, 0, db.left, h, Region.Op.UNION); |
| } |
| if (db.right < w) { |
| //Log.i("VIEW", "Drawable right " + db.right + " < view " + w); |
| r.op(db.right, 0, w, h, Region.Op.UNION); |
| } |
| if (db.top > 0) { |
| //Log.i("VIEW", "Drawable top " + db.top + " > view 0"); |
| r.op(0, 0, w, db.top, Region.Op.UNION); |
| } |
| if (db.bottom < h) { |
| //Log.i("VIEW", "Drawable bottom " + db.bottom + " < view " + h); |
| r.op(0, db.bottom, w, h, Region.Op.UNION); |
| } |
| final int[] location = attachInfo.mTransparentLocation; |
| getLocationInWindow(location); |
| r.translate(location[0], location[1]); |
| region.op(r, Region.Op.INTERSECT); |
| } else { |
| region.op(db, Region.Op.DIFFERENCE); |
| } |
| } |
| |
| private void checkForLongClick(int delayOffset) { |
| if ((mViewFlags & LONG_CLICKABLE) == LONG_CLICKABLE) { |
| mHasPerformedLongPress = false; |
| |
| if (mPendingCheckForLongPress == null) { |
| mPendingCheckForLongPress = new CheckForLongPress(); |
| } |
| mPendingCheckForLongPress.rememberWindowAttachCount(); |
| postDelayed(mPendingCheckForLongPress, |
| ViewConfiguration.getLongPressTimeout() - delayOffset); |
| } |
| } |
| |
| /** |
| * Inflate a view from an XML resource. This convenience method wraps the {@link |
| * LayoutInflater} class, which provides a full range of options for view inflation. |
| * |
| * @param context The Context object for your activity or application. |
| * @param resource The resource ID to inflate |
| * @param root A view group that will be the parent. Used to properly inflate the |
| * layout_* parameters. |
| * @see LayoutInflater |
| */ |
| public static View inflate(Context context, int resource, ViewGroup root) { |
| LayoutInflater factory = LayoutInflater.from(context); |
| return factory.inflate(resource, root); |
| } |
| |
| /** |
| * Scroll the view with standard behavior for scrolling beyond the normal |
| * content boundaries. Views that call this method should override |
| * {@link #onOverScrolled(int, int, boolean, boolean)} to respond to the |
| * results of an over-scroll operation. |
| * |
| * Views can use this method to handle any touch or fling-based scrolling. |
| * |
| * @param deltaX Change in X in pixels |
| * @param deltaY Change in Y in pixels |
| * @param scrollX Current X scroll value in pixels before applying deltaX |
| * @param scrollY Current Y scroll value in pixels before applying deltaY |
| * @param scrollRangeX Maximum content scroll range along the X axis |
| * @param scrollRangeY Maximum content scroll range along the Y axis |
| * @param maxOverScrollX Number of pixels to overscroll by in either direction |
| * along the X axis. |
| * @param maxOverScrollY Number of pixels to overscroll by in either direction |
| * along the Y axis. |
| * @param isTouchEvent true if this scroll operation is the result of a touch event. |
| * @return true if scrolling was clamped to an over-scroll boundary along either |
| * axis, false otherwise. |
| */ |
| @SuppressWarnings({"UnusedParameters"}) |
| protected boolean overScrollBy(int deltaX, int deltaY, |
| int scrollX, int scrollY, |
| int scrollRangeX, int scrollRangeY, |
| int maxOverScrollX, int maxOverScrollY, |
| boolean isTouchEvent) { |
| final int overScrollMode = mOverScrollMode; |
| final boolean canScrollHorizontal = |
| computeHorizontalScrollRange() > computeHorizontalScrollExtent(); |
| final boolean canScrollVertical = |
| computeVerticalScrollRange() > computeVerticalScrollExtent(); |
| final boolean overScrollHorizontal = overScrollMode == OVER_SCROLL_ALWAYS || |
| (overScrollMode == OVER_SCROLL_IF_CONTENT_SCROLLS && canScrollHorizontal); |
| final boolean overScrollVertical = overScrollMode == OVER_SCROLL_ALWAYS || |
| (overScrollMode == OVER_SCROLL_IF_CONTENT_SCROLLS && canScrollVertical); |
| |
| int newScrollX = scrollX + deltaX; |
| if (!overScrollHorizontal) { |
| maxOverScrollX = 0; |
| } |
| |
| int newScrollY = scrollY + deltaY; |
| if (!overScrollVertical) { |
| maxOverScrollY = 0; |
| } |
| |
| // Clamp values if at the limits and record |
| final int left = -maxOverScrollX; |
| final int right = maxOverScrollX + scrollRangeX; |
| final int top = -maxOverScrollY; |
| final int bottom = maxOverScrollY + scrollRangeY; |
| |
| boolean clampedX = false; |
| if (newScrollX > right) { |
| newScrollX = right; |
| clampedX = true; |
| } else if (newScrollX < left) { |
| newScrollX = left; |
| clampedX = true; |
| } |
| |
| boolean clampedY = false; |
| if (newScrollY > bottom) { |
| newScrollY = bottom; |
| clampedY = true; |
| } else if (newScrollY < top) { |
| newScrollY = top; |
| clampedY = true; |
| } |
| |
| onOverScrolled(newScrollX, newScrollY, clampedX, clampedY); |
| |
| return clampedX || clampedY; |
| } |
| |
| /** |
| * Called by {@link #overScrollBy(int, int, int, int, int, int, int, int, boolean)} to |
| * respond to the results of an over-scroll operation. |
| * |
| * @param scrollX New X scroll value in pixels |
| * @param scrollY New Y scroll value in pixels |
| * @param clampedX True if scrollX was clamped to an over-scroll boundary |
| * @param clampedY True if scrollY was clamped to an over-scroll boundary |
| */ |
| protected void onOverScrolled(int scrollX, int scrollY, |
| boolean clampedX, boolean clampedY) { |
| // Intentionally empty. |
| } |
| |
| /** |
| * Returns the over-scroll mode for this view. The result will be |
| * one of {@link #OVER_SCROLL_ALWAYS} (default), {@link #OVER_SCROLL_IF_CONTENT_SCROLLS} |
| * (allow over-scrolling only if the view content is larger than the container), |
| * or {@link #OVER_SCROLL_NEVER}. |
| * |
| * @return This view's over-scroll mode. |
| */ |
| public int getOverScrollMode() { |
| return mOverScrollMode; |
| } |
| |
| /** |
| * Set the over-scroll mode for this view. Valid over-scroll modes are |
| * {@link #OVER_SCROLL_ALWAYS} (default), {@link #OVER_SCROLL_IF_CONTENT_SCROLLS} |
| * (allow over-scrolling only if the view content is larger than the container), |
| * or {@link #OVER_SCROLL_NEVER}. |
| * |
| * Setting the over-scroll mode of a view will have an effect only if the |
| * view is capable of scrolling. |
| * |
| * @param overScrollMode The new over-scroll mode for this view. |
| */ |
| public void setOverScrollMode(int overScrollMode) { |
| if (overScrollMode != OVER_SCROLL_ALWAYS && |
| overScrollMode != OVER_SCROLL_IF_CONTENT_SCROLLS && |
| overScrollMode != OVER_SCROLL_NEVER) { |
| throw new IllegalArgumentException("Invalid overscroll mode " + overScrollMode); |
| } |
| mOverScrollMode = overScrollMode; |
| } |
| |
| /** |
| * Gets a scale factor that determines the distance the view should scroll |
| * vertically in response to {@link MotionEvent#ACTION_SCROLL}. |
| * @return The vertical scroll scale factor. |
| * @hide |
| */ |
| protected float getVerticalScrollFactor() { |
| if (mVerticalScrollFactor == 0) { |
| TypedValue outValue = new TypedValue(); |
| if (!mContext.getTheme().resolveAttribute( |
| com.android.internal.R.attr.listPreferredItemHeight, outValue, true)) { |
| throw new IllegalStateException( |
| "Expected theme to define listPreferredItemHeight."); |
| } |
| mVerticalScrollFactor = outValue.getDimension( |
| mContext.getResources().getDisplayMetrics()); |
| } |
| return mVerticalScrollFactor; |
| } |
| |
| /** |
| * Gets a scale factor that determines the distance the view should scroll |
| * horizontally in response to {@link MotionEvent#ACTION_SCROLL}. |
| * @return The horizontal scroll scale factor. |
| * @hide |
| */ |
| protected float getHorizontalScrollFactor() { |
| // TODO: Should use something else. |
| return getVerticalScrollFactor(); |
| } |
| |
| /** |
| * Return the value specifying the text direction or policy that was set with |
| * {@link #setTextDirection(int)}. |
| * |
| * @return the defined text direction. It can be one of: |
| * |
| * {@link #TEXT_DIRECTION_INHERIT}, |
| * {@link #TEXT_DIRECTION_FIRST_STRONG} |
| * {@link #TEXT_DIRECTION_ANY_RTL}, |
| * {@link #TEXT_DIRECTION_CHAR_COUNT}, |
| * {@link #TEXT_DIRECTION_LTR}, |
| * {@link #TEXT_DIRECTION_RTL}, |
| * |
| * @hide |
| */ |
| public int getTextDirection() { |
| return mTextDirection; |
| } |
| |
| /** |
| * Set the text direction. |
| * |
| * @param textDirection the direction to set. Should be one of: |
| * |
| * {@link #TEXT_DIRECTION_INHERIT}, |
| * {@link #TEXT_DIRECTION_FIRST_STRONG} |
| * {@link #TEXT_DIRECTION_ANY_RTL}, |
| * {@link #TEXT_DIRECTION_CHAR_COUNT}, |
| * {@link #TEXT_DIRECTION_LTR}, |
| * {@link #TEXT_DIRECTION_RTL}, |
| * |
| * @hide |
| */ |
| public void setTextDirection(int textDirection) { |
| if (textDirection != mTextDirection) { |
| mTextDirection = textDirection; |
| resetResolvedTextDirection(); |
| requestLayout(); |
| } |
| } |
| |
| /** |
| * Return the resolved text direction. |
| * |
| * @return the resolved text direction. Return one of: |
| * |
| * {@link #TEXT_DIRECTION_LTR}, |
| * {@link #TEXT_DIRECTION_RTL}, |
| * |
| * @hide |
| */ |
| public int getResolvedTextDirection() { |
| if (!isResolvedTextDirection()) { |
| resolveTextDirection(); |
| } |
| return mResolvedTextDirection; |
| } |
| |
| /** |
| * Resolve the text direction. Classes that extend View and want to do a specific text direction |
| * resolution will need to implement this method and set the mResolvedTextDirection to |
| * either TEXT_DIRECTION_LTR if direction is LTR or TEXT_DIRECTION_RTL if |
| * direction is RTL. |
| */ |
| protected void resolveTextDirection() { |
| } |
| |
| /** |
| * Return if the text direction has been resolved or not. |
| * |
| * @return true, if resolved and false if not resolved |
| * |
| * @hide |
| */ |
| public boolean isResolvedTextDirection() { |
| return (mResolvedTextDirection != TEXT_DIRECTION_UNDEFINED); |
| } |
| |
| /** |
| * Reset resolved text direction. Will be resolved during a call to getResolvedLayoutDirection(). |
| */ |
| protected void resetResolvedTextDirection() { |
| mResolvedTextDirection = TEXT_DIRECTION_UNDEFINED; |
| } |
| |
| // |
| // Properties |
| // |
| /** |
| * A Property wrapper around the <code>alpha</code> functionality handled by the |
| * {@link View#setAlpha(float)} and {@link View#getAlpha()} methods. |
| */ |
| public static Property<View, Float> ALPHA = new FloatProperty<View>("alpha") { |
| @Override |
| public void setValue(View object, float value) { |
| object.setAlpha(value); |
| } |
| |
| @Override |
| public Float get(View object) { |
| return object.getAlpha(); |
| } |
| }; |
| |
| /** |
| * A Property wrapper around the <code>translationX</code> functionality handled by the |
| * {@link View#setTranslationX(float)} and {@link View#getTranslationX()} methods. |
| */ |
| public static Property<View, Float> TRANSLATION_X = new FloatProperty<View>("translationX") { |
| @Override |
| public void setValue(View object, float value) { |
| object.setTranslationX(value); |
| } |
| |
| @Override |
| public Float get(View object) { |
| return object.getTranslationX(); |
| } |
| }; |
| |
| /** |
| * A Property wrapper around the <code>translationY</code> functionality handled by the |
| * {@link View#setTranslationY(float)} and {@link View#getTranslationY()} methods. |
| */ |
| public static Property<View, Float> TRANSLATION_Y = new FloatProperty<View>("translationY") { |
| @Override |
| public void setValue(View object, float value) { |
| object.setTranslationY(value); |
| } |
| |
| @Override |
| public Float get(View object) { |
| return object.getTranslationY(); |
| } |
| }; |
| |
| /** |
| * A Property wrapper around the <code>x</code> functionality handled by the |
| * {@link View#setX(float)} and {@link View#getX()} methods. |
| */ |
| public static Property<View, Float> X = new FloatProperty<View>("x") { |
| @Override |
| public void setValue(View object, float value) { |
| object.setX(value); |
| } |
| |
| @Override |
| public Float get(View object) { |
| return object.getX(); |
| } |
| }; |
| |
| /** |
| * A Property wrapper around the <code>y</code> functionality handled by the |
| * {@link View#setY(float)} and {@link View#getY()} methods. |
| */ |
| public static Property<View, Float> Y = new FloatProperty<View>("y") { |
| @Override |
| public void setValue(View object, float value) { |
| object.setY(value); |
| } |
| |
| @Override |
| public Float get(View object) { |
| return object.getY(); |
| } |
| }; |
| |
| /** |
| * A Property wrapper around the <code>rotation</code> functionality handled by the |
| * {@link View#setRotation(float)} and {@link View#getRotation()} methods. |
| */ |
| public static Property<View, Float> ROTATION = new FloatProperty<View>("rotation") { |
| @Override |
| public void setValue(View object, float value) { |
| object.setRotation(value); |
| } |
| |
| @Override |
| public Float get(View object) { |
| return object.getRotation(); |
| } |
| }; |
| |
| /** |
| * A Property wrapper around the <code>rotationX</code> functionality handled by the |
| * {@link View#setRotationX(float)} and {@link View#getRotationX()} methods. |
| */ |
| public static Property<View, Float> ROTATION_X = new FloatProperty<View>("rotationX") { |
| @Override |
| public void setValue(View object, float value) { |
| object.setRotationX(value); |
| } |
| |
| @Override |
| public Float get(View object) { |
| return object.getRotationX(); |
| } |
| }; |
| |
| /** |
| * A Property wrapper around the <code>rotationY</code> functionality handled by the |
| * {@link View#setRotationY(float)} and {@link View#getRotationY()} methods. |
| */ |
| public static Property<View, Float> ROTATION_Y = new FloatProperty<View>("rotationY") { |
| @Override |
| public void setValue(View object, float value) { |
| object.setRotationY(value); |
| } |
| |
| @Override |
| public Float get(View object) { |
| return object.getRotationY(); |
| } |
| }; |
| |
| /** |
| * A Property wrapper around the <code>scaleX</code> functionality handled by the |
| * {@link View#setScaleX(float)} and {@link View#getScaleX()} methods. |
| */ |
| public static Property<View, Float> SCALE_X = new FloatProperty<View>("scaleX") { |
| @Override |
| public void setValue(View object, float value) { |
| object.setScaleX(value); |
| } |
| |
| @Override |
| public Float get(View object) { |
| return object.getScaleX(); |
| } |
| }; |
| |
| /** |
| * A Property wrapper around the <code>scaleY</code> functionality handled by the |
| * {@link View#setScaleY(float)} and {@link View#getScaleY()} methods. |
| */ |
| public static Property<View, Float> SCALE_Y = new FloatProperty<View>("scaleY") { |
| @Override |
| public void setValue(View object, float value) { |
| object.setScaleY(value); |
| } |
| |
| @Override |
| public Float get(View object) { |
| return object.getScaleY(); |
| } |
| }; |
| |
| /** |
| * A MeasureSpec encapsulates the layout requirements passed from parent to child. |
| * Each MeasureSpec represents a requirement for either the width or the height. |
| * A MeasureSpec is comprised of a size and a mode. There are three possible |
| * modes: |
| * <dl> |
| * <dt>UNSPECIFIED</dt> |
| * <dd> |
| * The parent has not imposed any constraint on the child. It can be whatever size |
| * it wants. |
| * </dd> |
| * |
| * <dt>EXACTLY</dt> |
| * <dd> |
| * The parent has determined an exact size for the child. The child is going to be |
| * given those bounds regardless of how big it wants to be. |
| * </dd> |
| * |
| * <dt>AT_MOST</dt> |
| * <dd> |
| * The child can be as large as it wants up to the specified size. |
| * </dd> |
| * </dl> |
| * |
| * MeasureSpecs are implemented as ints to reduce object allocation. This class |
| * is provided to pack and unpack the <size, mode> tuple into the int. |
| */ |
| public static class MeasureSpec { |
| private static final int MODE_SHIFT = 30; |
| private static final int MODE_MASK = 0x3 << MODE_SHIFT; |
| |
| /** |
| * Measure specification mode: The parent has not imposed any constraint |
| * on the child. It can be whatever size it wants. |
| */ |
| public static final int UNSPECIFIED = 0 << MODE_SHIFT; |
| |
| /** |
| * Measure specification mode: The parent has determined an exact size |
| * for the child. The child is going to be given those bounds regardless |
| * of how big it wants to be. |
| */ |
| public static final int EXACTLY = 1 << MODE_SHIFT; |
| |
| /** |
| * Measure specification mode: The child can be as large as it wants up |
| * to the specified size. |
| */ |
| public static final int AT_MOST = 2 << MODE_SHIFT; |
| |
| /** |
| * Creates a measure specification based on the supplied size and mode. |
| * |
| * The mode must always be one of the following: |
| * <ul> |
| * <li>{@link android.view.View.MeasureSpec#UNSPECIFIED}</li> |
| * <li>{@link android.view.View.MeasureSpec#EXACTLY}</li> |
| * <li>{@link android.view.View.MeasureSpec#AT_MOST}</li> |
| * </ul> |
| * |
| * @param size the size of the measure specification |
| * @param mode the mode of the measure specification |
| * @return the measure specification based on size and mode |
| */ |
| public static int makeMeasureSpec(int size, int mode) { |
| return size + mode; |
| } |
| |
| /** |
| * Extracts the mode from the supplied measure specification. |
| * |
| * @param measureSpec the measure specification to extract the mode from |
| * @return {@link android.view.View.MeasureSpec#UNSPECIFIED}, |
| * {@link android.view.View.MeasureSpec#AT_MOST} or |
| * {@link android.view.View.MeasureSpec#EXACTLY} |
| */ |
| public static int getMode(int measureSpec) { |
| return (measureSpec & MODE_MASK); |
| } |
| |
| /** |
| * Extracts the size from the supplied measure specification. |
| * |
| * @param measureSpec the measure specification to extract the size from |
| * @return the size in pixels defined in the supplied measure specification |
| */ |
| public static int getSize(int measureSpec) { |
| return (measureSpec & ~MODE_MASK); |
| } |
| |
| /** |
| * Returns a String representation of the specified measure |
| * specification. |
| * |
| * @param measureSpec the measure specification to convert to a String |
| * @return a String with the following format: "MeasureSpec: MODE SIZE" |
| */ |
| public static String toString(int measureSpec) { |
| int mode = getMode(measureSpec); |
| int size = getSize(measureSpec); |
| |
| StringBuilder sb = new StringBuilder("MeasureSpec: "); |
| |
| if (mode == UNSPECIFIED) |
| sb.append("UNSPECIFIED "); |
| else if (mode == EXACTLY) |
| sb.append("EXACTLY "); |
| else if (mode == AT_MOST) |
| sb.append("AT_MOST "); |
| else |
| sb.append(mode).append(" "); |
| |
| sb.append(size); |
| return sb.toString(); |
| } |
| } |
| |
| class CheckForLongPress implements Runnable { |
| |
| private int mOriginalWindowAttachCount; |
| |
| public void run() { |
| if (isPressed() && (mParent != null) |
| && mOriginalWindowAttachCount == mWindowAttachCount) { |
| if (performLongClick()) { |
| mHasPerformedLongPress = true; |
| } |
| } |
| } |
| |
| public void rememberWindowAttachCount() { |
| mOriginalWindowAttachCount = mWindowAttachCount; |
| } |
| } |
| |
| private final class CheckForTap implements Runnable { |
| public void run() { |
| mPrivateFlags &= ~PREPRESSED; |
| mPrivateFlags |= PRESSED; |
| refreshDrawableState(); |
| checkForLongClick(ViewConfiguration.getTapTimeout()); |
| } |
| } |
| |
| private final class PerformClick implements Runnable { |
| public void run() { |
| performClick(); |
| } |
| } |
| |
| /** @hide */ |
| public void hackTurnOffWindowResizeAnim(boolean off) { |
| mAttachInfo.mTurnOffWindowResizeAnim = off; |
| } |
| |
| /** |
| * This method returns a ViewPropertyAnimator object, which can be used to animate |
| * specific properties on this View. |
| * |
| * @return ViewPropertyAnimator The ViewPropertyAnimator associated with this View. |
| */ |
| public ViewPropertyAnimator animate() { |
| if (mAnimator == null) { |
| mAnimator = new ViewPropertyAnimator(this); |
| } |
| return mAnimator; |
| } |
| |
| /** |
| * Interface definition for a callback to be invoked when a key event is |
| * dispatched to this view. The callback will be invoked before the key |
| * event is given to the view. |
| */ |
| public interface OnKeyListener { |
| /** |
| * Called when a key is dispatched to a view. This allows listeners to |
| * get a chance to respond before the target view. |
| * |
| * @param v The view the key has been dispatched to. |
| * @param keyCode The code for the physical key that was pressed |
| * @param event The KeyEvent object containing full information about |
| * the event. |
| * @return True if the listener has consumed the event, false otherwise. |
| */ |
| boolean onKey(View v, int keyCode, KeyEvent event); |
| } |
| |
| /** |
| * Interface definition for a callback to be invoked when a touch event is |
| * dispatched to this view. The callback will be invoked before the touch |
| * event is given to the view. |
| */ |
| public interface OnTouchListener { |
| /** |
| * Called when a touch event is dispatched to a view. This allows listeners to |
| * get a chance to respond before the target view. |
| * |
| * @param v The view the touch event has been dispatched to. |
| * @param event The MotionEvent object containing full information about |
| * the event. |
| * @return True if the listener has consumed the event, false otherwise. |
| */ |
| boolean onTouch(View v, MotionEvent event); |
| } |
| |
| /** |
| * Interface definition for a callback to be invoked when a hover event is |
| * dispatched to this view. The callback will be invoked before the hover |
| * event is given to the view. |
| */ |
| public interface OnHoverListener { |
| /** |
| * Called when a hover event is dispatched to a view. This allows listeners to |
| * get a chance to respond before the target view. |
| * |
| * @param v The view the hover event has been dispatched to. |
| * @param event The MotionEvent object containing full information about |
| * the event. |
| * @return True if the listener has consumed the event, false otherwise. |
| */ |
| boolean onHover(View v, MotionEvent event); |
| } |
| |
| /** |
| * Interface definition for a callback to be invoked when a generic motion event is |
| * dispatched to this view. The callback will be invoked before the generic motion |
| * event is given to the view. |
| */ |
| public interface OnGenericMotionListener { |
| /** |
| * Called when a generic motion event is dispatched to a view. This allows listeners to |
| * get a chance to respond before the target view. |
| * |
| * @param v The view the generic motion event has been dispatched to. |
| * @param event The MotionEvent object containing full information about |
| * the event. |
| * @return True if the listener has consumed the event, false otherwise. |
| */ |
| boolean onGenericMotion(View v, MotionEvent event); |
| } |
| |
| /** |
| * Interface definition for a callback to be invoked when a view has been clicked and held. |
| */ |
| public interface OnLongClickListener { |
| /** |
| * Called when a view has been clicked and held. |
| * |
| * @param v The view that was clicked and held. |
| * |
| * @return true if the callback consumed the long click, false otherwise. |
| */ |
| boolean onLongClick(View v); |
| } |
| |
| /** |
| * Interface definition for a callback to be invoked when a drag is being dispatched |
| * to this view. The callback will be invoked before the hosting view's own |
| * onDrag(event) method. If the listener wants to fall back to the hosting view's |
| * onDrag(event) behavior, it should return 'false' from this callback. |
| */ |
| public interface OnDragListener { |
| /** |
| * Called when a drag event is dispatched to a view. This allows listeners |
| * to get a chance to override base View behavior. |
| * |
| * @param v The View that received the drag event. |
| * @param event The {@link android.view.DragEvent} object for the drag event. |
| * @return {@code true} if the drag event was handled successfully, or {@code false} |
| * if the drag event was not handled. Note that {@code false} will trigger the View |
| * to call its {@link #onDragEvent(DragEvent) onDragEvent()} handler. |
| */ |
| boolean onDrag(View v, DragEvent event); |
| } |
| |
| /** |
| * Interface definition for a callback to be invoked when the focus state of |
| * a view changed. |
| */ |
| public interface OnFocusChangeListener { |
| /** |
| * Called when the focus state of a view has changed. |
| * |
| * @param v The view whose state has changed. |
| * @param hasFocus The new focus state of v. |
| */ |
| void onFocusChange(View v, boolean hasFocus); |
| } |
| |
| /** |
| * Interface definition for a callback to be invoked when a view is clicked. |
| */ |
| public interface OnClickListener { |
| /** |
| * Called when a view has been clicked. |
| * |
| * @param v The view that was clicked. |
| */ |
| void onClick(View v); |
| } |
| |
| /** |
| * Interface definition for a callback to be invoked when the context menu |
| * for this view is being built. |
| */ |
| public interface OnCreateContextMenuListener { |
| /** |
| * Called when the context menu for this view is being built. It is not |
| * safe to hold onto the menu after this method returns. |
| * |
| * @param menu The context menu that is being built |
| * @param v The view for which the context menu is being built |
| * @param menuInfo Extra information about the item for which the |
| * context menu should be shown. This information will vary |
| * depending on the class of v. |
| */ |
| void onCreateContextMenu(ContextMenu menu, View v, ContextMenuInfo menuInfo); |
| } |
| |
| /** |
| * Interface definition for a callback to be invoked when the status bar changes |
| * visibility. |
| * |
| * @see View#setOnSystemUiVisibilityChangeListener(android.view.View.OnSystemUiVisibilityChangeListener) |
| */ |
| public interface OnSystemUiVisibilityChangeListener { |
| /** |
| * Called when the status bar changes visibility because of a call to |
| * {@link View#setSystemUiVisibility(int)}. |
| * |
| * @param visibility {@link #STATUS_BAR_VISIBLE} or {@link #STATUS_BAR_HIDDEN}. |
| */ |
| public void onSystemUiVisibilityChange(int visibility); |
| } |
| |
| /** |
| * Interface definition for a callback to be invoked when this view is attached |
| * or detached from its window. |
| */ |
| public interface OnAttachStateChangeListener { |
| /** |
| * Called when the view is attached to a window. |
| * @param v The view that was attached |
| */ |
| public void onViewAttachedToWindow(View v); |
| /** |
| * Called when the view is detached from a window. |
| * @param v The view that was detached |
| */ |
| public void onViewDetachedFromWindow(View v); |
| } |
| |
| private final class UnsetPressedState implements Runnable { |
| public void run() { |
| setPressed(false); |
| } |
| } |
| |
| /** |
| * Base class for derived classes that want to save and restore their own |
| * state in {@link android.view.View#onSaveInstanceState()}. |
| */ |
| public static class BaseSavedState extends AbsSavedState { |
| /** |
| * Constructor used when reading from a parcel. Reads the state of the superclass. |
| * |
| * @param source |
| */ |
| public BaseSavedState(Parcel source) { |
| super(source); |
| } |
| |
| /** |
| * Constructor called by derived classes when creating their SavedState objects |
| * |
| * @param superState The state of the superclass of this view |
| */ |
| public BaseSavedState(Parcelable superState) { |
| super(superState); |
| } |
| |
| public static final Parcelable.Creator<BaseSavedState> CREATOR = |
| new Parcelable.Creator<BaseSavedState>() { |
| public BaseSavedState createFromParcel(Parcel in) { |
| return new BaseSavedState(in); |
| } |
| |
| public BaseSavedState[] newArray(int size) { |
| return new BaseSavedState[size]; |
| } |
| }; |
| } |
| |
| /** |
| * A set of information given to a view when it is attached to its parent |
| * window. |
| */ |
| static class AttachInfo { |
| interface Callbacks { |
| void playSoundEffect(int effectId); |
| boolean performHapticFeedback(int effectId, boolean always); |
| } |
| |
| /** |
| * InvalidateInfo is used to post invalidate(int, int, int, int) messages |
| * to a Handler. This class contains the target (View) to invalidate and |
| * the coordinates of the dirty rectangle. |
| * |
| * For performance purposes, this class also implements a pool of up to |
| * POOL_LIMIT objects that get reused. This reduces memory allocations |
| * whenever possible. |
| */ |
| static class InvalidateInfo implements Poolable<InvalidateInfo> { |
| private static final int POOL_LIMIT = 10; |
| private static final Pool<InvalidateInfo> sPool = Pools.synchronizedPool( |
| Pools.finitePool(new PoolableManager<InvalidateInfo>() { |
| public InvalidateInfo newInstance() { |
| return new InvalidateInfo(); |
| } |
| |
| public void onAcquired(InvalidateInfo element) { |
| } |
| |
| public void onReleased(InvalidateInfo element) { |
| } |
| }, POOL_LIMIT) |
| ); |
| |
| private InvalidateInfo mNext; |
| private boolean mIsPooled; |
| |
| View target; |
| |
| int left; |
| int top; |
| int right; |
| int bottom; |
| |
| public void setNextPoolable(InvalidateInfo element) { |
| mNext = element; |
| } |
| |
| public InvalidateInfo getNextPoolable() { |
| return mNext; |
| } |
| |
| static InvalidateInfo acquire() { |
| return sPool.acquire(); |
| } |
| |
| void release() { |
| sPool.release(this); |
| } |
| |
| public boolean isPooled() { |
| return mIsPooled; |
| } |
| |
| public void setPooled(boolean isPooled) { |
| mIsPooled = isPooled; |
| } |
| } |
| |
| final IWindowSession mSession; |
| |
| final IWindow mWindow; |
| |
| final IBinder mWindowToken; |
| |
| final Callbacks mRootCallbacks; |
| |
| HardwareCanvas mHardwareCanvas; |
| |
| /** |
| * The top view of the hierarchy. |
| */ |
| View mRootView; |
| |
| IBinder mPanelParentWindowToken; |
| Surface mSurface; |
| |
| boolean mHardwareAccelerated; |
| boolean mHardwareAccelerationRequested; |
| HardwareRenderer mHardwareRenderer; |
| |
| /** |
| * Scale factor used by the compatibility mode |
| */ |
| float mApplicationScale; |
| |
| /** |
| * Indicates whether the application is in compatibility mode |
| */ |
| boolean mScalingRequired; |
| |
| /** |
| * If set, ViewAncestor doesn't use its lame animation for when the window resizes. |
| */ |
| boolean mTurnOffWindowResizeAnim; |
| |
| /** |
| * Left position of this view's window |
| */ |
| int mWindowLeft; |
| |
| /** |
| * Top position of this view's window |
| */ |
| int mWindowTop; |
| |
| /** |
| * Indicates whether views need to use 32-bit drawing caches |
| */ |
| boolean mUse32BitDrawingCache; |
| |
| /** |
| * For windows that are full-screen but using insets to layout inside |
| * of the screen decorations, these are the current insets for the |
| * content of the window. |
| */ |
| final Rect mContentInsets = new Rect(); |
| |
| /** |
| * For windows that are full-screen but using insets to layout inside |
| * of the screen decorations, these are the current insets for the |
| * actual visible parts of the window. |
| */ |
| final Rect mVisibleInsets = new Rect(); |
| |
| /** |
| * The internal insets given by this window. This value is |
| * supplied by the client (through |
| * {@link ViewTreeObserver.OnComputeInternalInsetsListener}) and will |
| * be given to the window manager when changed to be used in laying |
| * out windows behind it. |
| */ |
| final ViewTreeObserver.InternalInsetsInfo mGivenInternalInsets |
| = new ViewTreeObserver.InternalInsetsInfo(); |
| |
| /** |
| * All views in the window's hierarchy that serve as scroll containers, |
| * used to determine if the window can be resized or must be panned |
| * to adjust for a soft input area. |
| */ |
| final ArrayList<View> mScrollContainers = new ArrayList<View>(); |
| |
| final KeyEvent.DispatcherState mKeyDispatchState |
| = new KeyEvent.DispatcherState(); |
| |
| /** |
| * Indicates whether the view's window currently has the focus. |
| */ |
| boolean mHasWindowFocus; |
| |
| /** |
| * The current visibility of the window. |
| */ |
| int mWindowVisibility; |
| |
| /** |
| * Indicates the time at which drawing started to occur. |
| */ |
| long mDrawingTime; |
| |
| /** |
| * Indicates whether or not ignoring the DIRTY_MASK flags. |
| */ |
| boolean mIgnoreDirtyState; |
| |
| /** |
| * This flag tracks when the mIgnoreDirtyState flag is set during draw(), |
| * to avoid clearing that flag prematurely. |
| */ |
| boolean mSetIgnoreDirtyState = false; |
| |
| /** |
| * Indicates whether the view's window is currently in touch mode. |
| */ |
| boolean mInTouchMode; |
| |
| /** |
| * Indicates that ViewAncestor should trigger a global layout change |
| * the next time it performs a traversal |
| */ |
| boolean mRecomputeGlobalAttributes; |
| |
| /** |
| * Set during a traveral if any views want to keep the screen on. |
| */ |
| boolean mKeepScreenOn; |
| |
| /** |
| * Bitwise-or of all of the values that views have passed to setSystemUiVisibility(). |
| */ |
| int mSystemUiVisibility; |
| |
| /** |
| * True if a view in this hierarchy has an OnSystemUiVisibilityChangeListener |
| * attached. |
| */ |
| boolean mHasSystemUiListeners; |
| |
| /** |
| * Set if the visibility of any views has changed. |
| */ |
| boolean mViewVisibilityChanged; |
| |
| /** |
| * Set to true if a view has been scrolled. |
| */ |
| boolean mViewScrollChanged; |
| |
| /** |
| * Global to the view hierarchy used as a temporary for dealing with |
| * x/y points in the transparent region computations. |
| */ |
| final int[] mTransparentLocation = new int[2]; |
| |
| /** |
| * Global to the view hierarchy used as a temporary for dealing with |
| * x/y points in the ViewGroup.invalidateChild implementation. |
| */ |
| final int[] mInvalidateChildLocation = new int[2]; |
| |
| |
| /** |
| * Global to the view hierarchy used as a temporary for dealing with |
| * x/y location when view is transformed. |
| */ |
| final float[] mTmpTransformLocation = new float[2]; |
| |
| /** |
| * The view tree observer used to dispatch global events like |
| * layout, pre-draw, touch mode change, etc. |
| */ |
| final ViewTreeObserver mTreeObserver = new ViewTreeObserver(); |
| |
| /** |
| * A Canvas used by the view hierarchy to perform bitmap caching. |
| */ |
| Canvas mCanvas; |
| |
| /** |
| * A Handler supplied by a view's {@link android.view.ViewAncestor}. This |
| * handler can be used to pump events in the UI events queue. |
| */ |
| final Handler mHandler; |
| |
| /** |
| * Identifier for messages requesting the view to be invalidated. |
| * Such messages should be sent to {@link #mHandler}. |
| */ |
| static final int INVALIDATE_MSG = 0x1; |
| |
| /** |
| * Identifier for messages requesting the view to invalidate a region. |
| * Such messages should be sent to {@link #mHandler}. |
| */ |
| static final int INVALIDATE_RECT_MSG = 0x2; |
| |
| /** |
| * Temporary for use in computing invalidate rectangles while |
| * calling up the hierarchy. |
| */ |
| final Rect mTmpInvalRect = new Rect(); |
| |
| /** |
| * Temporary for use in computing hit areas with transformed views |
| */ |
| final RectF mTmpTransformRect = new RectF(); |
| |
| /** |
| * Temporary list for use in collecting focusable descendents of a view. |
| */ |
| final ArrayList<View> mFocusablesTempList = new ArrayList<View>(24); |
| |
| /** |
| * The id of the window for accessibility purposes. |
| */ |
| int mAccessibilityWindowId = View.NO_ID; |
| |
| /** |
| * Creates a new set of attachment information with the specified |
| * events handler and thread. |
| * |
| * @param handler the events handler the view must use |
| */ |
| AttachInfo(IWindowSession session, IWindow window, |
| Handler handler, Callbacks effectPlayer) { |
| mSession = session; |
| mWindow = window; |
| mWindowToken = window.asBinder(); |
| mHandler = handler; |
| mRootCallbacks = effectPlayer; |
| } |
| } |
| |
| /** |
| * <p>ScrollabilityCache holds various fields used by a View when scrolling |
| * is supported. This avoids keeping too many unused fields in most |
| * instances of View.</p> |
| */ |
| private static class ScrollabilityCache implements Runnable { |
| |
| /** |
| * Scrollbars are not visible |
| */ |
| public static final int OFF = 0; |
| |
| /** |
| * Scrollbars are visible |
| */ |
| public static final int ON = 1; |
| |
| /** |
| * Scrollbars are fading away |
| */ |
| public static final int FADING = 2; |
| |
| public boolean fadeScrollBars; |
| |
| public int fadingEdgeLength; |
| public int scrollBarDefaultDelayBeforeFade; |
| public int scrollBarFadeDuration; |
| |
| public int scrollBarSize; |
| public ScrollBarDrawable scrollBar; |
| public float[] interpolatorValues; |
| public View host; |
| |
| public final Paint paint; |
| public final Matrix matrix; |
| public Shader shader; |
| |
| public final Interpolator scrollBarInterpolator = new Interpolator(1, 2); |
| |
| private static final float[] OPAQUE = { 255 }; |
| private static final float[] TRANSPARENT = { 0.0f }; |
| |
| /** |
| * When fading should start. This time moves into the future every time |
| * a new scroll happens. Measured based on SystemClock.uptimeMillis() |
| */ |
| public long fadeStartTime; |
| |
| |
| /** |
| * The current state of the scrollbars: ON, OFF, or FADING |
| */ |
| public int state = OFF; |
| |
| private int mLastColor; |
| |
| public ScrollabilityCache(ViewConfiguration configuration, View host) { |
| fadingEdgeLength = configuration.getScaledFadingEdgeLength(); |
| scrollBarSize = configuration.getScaledScrollBarSize(); |
| scrollBarDefaultDelayBeforeFade = ViewConfiguration.getScrollDefaultDelay(); |
| scrollBarFadeDuration = ViewConfiguration.getScrollBarFadeDuration(); |
| |
| paint = new Paint(); |
| matrix = new Matrix(); |
| // use use a height of 1, and then wack the matrix each time we |
| // actually use it. |
| shader = new LinearGradient(0, 0, 0, 1, 0xFF000000, 0, Shader.TileMode.CLAMP); |
| |
| paint.setShader(shader); |
| paint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.DST_OUT)); |
| this.host = host; |
| } |
| |
| public void setFadeColor(int color) { |
| if (color != 0 && color != mLastColor) { |
| mLastColor = color; |
| color |= 0xFF000000; |
| |
| shader = new LinearGradient(0, 0, 0, 1, color | 0xFF000000, |
| color & 0x00FFFFFF, Shader.TileMode.CLAMP); |
| |
| paint.setShader(shader); |
| // Restore the default transfer mode (src_over) |
| paint.setXfermode(null); |
| } |
| } |
| |
| public void run() { |
| long now = AnimationUtils.currentAnimationTimeMillis(); |
| if (now >= fadeStartTime) { |
| |
| // the animation fades the scrollbars out by changing |
| // the opacity (alpha) from fully opaque to fully |
| // transparent |
| int nextFrame = (int) now; |
| int framesCount = 0; |
| |
| Interpolator interpolator = scrollBarInterpolator; |
| |
| // Start opaque |
| interpolator.setKeyFrame(framesCount++, nextFrame, OPAQUE); |
| |
| // End transparent |
| nextFrame += scrollBarFadeDuration; |
| interpolator.setKeyFrame(framesCount, nextFrame, TRANSPARENT); |
| |
| state = FADING; |
| |
| // Kick off the fade animation |
| host.invalidate(true); |
| } |
| } |
| } |
| |
| /** |
| * Resuable callback for sending |
| * {@link AccessibilityEvent#TYPE_VIEW_SCROLLED} accessibility event. |
| */ |
| private class SendViewScrolledAccessibilityEvent implements Runnable { |
| public volatile boolean mIsPending; |
| |
| public void run() { |
| sendAccessibilityEvent(AccessibilityEvent.TYPE_VIEW_SCROLLED); |
| mIsPending = false; |
| } |
| } |
| } |