Adam Cohen | 3db4067 | 2010-07-19 22:41:57 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2010 The Android Open Source Project |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | |
| 17 | package android.widget; |
| 18 | |
Adam Cohen | 44729e3 | 2010-07-22 16:00:07 -0700 | [diff] [blame] | 19 | import java.util.ArrayList; |
Adam Cohen | 44729e3 | 2010-07-22 16:00:07 -0700 | [diff] [blame] | 20 | |
| 21 | import android.animation.PropertyAnimator; |
Adam Cohen | 3db4067 | 2010-07-19 22:41:57 -0700 | [diff] [blame] | 22 | import android.content.Context; |
| 23 | import android.content.Intent; |
| 24 | import android.content.res.TypedArray; |
Adam Cohen | 44729e3 | 2010-07-22 16:00:07 -0700 | [diff] [blame] | 25 | import android.graphics.Rect; |
Adam Cohen | 3db4067 | 2010-07-19 22:41:57 -0700 | [diff] [blame] | 26 | import android.os.Handler; |
| 27 | import android.os.Looper; |
Adam Cohen | b04f7ad | 2010-08-15 13:22:42 -0700 | [diff] [blame^] | 28 | import android.os.Parcel; |
| 29 | import android.os.Parcelable; |
Adam Cohen | 3db4067 | 2010-07-19 22:41:57 -0700 | [diff] [blame] | 30 | import android.util.AttributeSet; |
Adam Cohen | 3db4067 | 2010-07-19 22:41:57 -0700 | [diff] [blame] | 31 | import android.view.View; |
Adam Cohen | 44729e3 | 2010-07-22 16:00:07 -0700 | [diff] [blame] | 32 | import android.view.ViewGroup; |
Adam Cohen | 3db4067 | 2010-07-19 22:41:57 -0700 | [diff] [blame] | 33 | import android.view.animation.Animation; |
| 34 | import android.view.animation.AnimationUtils; |
| 35 | |
| 36 | /** |
| 37 | * Base class for a {@link AdapterView} that will perform animations |
| 38 | * when switching between its views. |
| 39 | * |
| 40 | * @attr ref android.R.styleable#AdapterViewAnimator_inAnimation |
| 41 | * @attr ref android.R.styleable#AdapterViewAnimator_outAnimation |
| 42 | * @attr ref android.R.styleable#AdapterViewAnimator_animateFirstView |
| 43 | */ |
Adam Cohen | 44729e3 | 2010-07-22 16:00:07 -0700 | [diff] [blame] | 44 | public abstract class AdapterViewAnimator extends AdapterView<Adapter> |
| 45 | implements RemoteViewsAdapter.RemoteAdapterConnectionCallback{ |
Adam Cohen | 3db4067 | 2010-07-19 22:41:57 -0700 | [diff] [blame] | 46 | private static final String TAG = "RemoteViewAnimator"; |
| 47 | |
Adam Cohen | 44729e3 | 2010-07-22 16:00:07 -0700 | [diff] [blame] | 48 | /** |
| 49 | * The index of the current child, which appears anywhere from the beginning |
| 50 | * to the end of the current set of children, as specified by {@link #mActiveOffset} |
| 51 | */ |
Adam Cohen | 3db4067 | 2010-07-19 22:41:57 -0700 | [diff] [blame] | 52 | int mWhichChild = 0; |
Adam Cohen | 44729e3 | 2010-07-22 16:00:07 -0700 | [diff] [blame] | 53 | |
| 54 | /** |
| 55 | * Whether or not the first view(s) should be animated in |
| 56 | */ |
Adam Cohen | 3db4067 | 2010-07-19 22:41:57 -0700 | [diff] [blame] | 57 | boolean mAnimateFirstTime = true; |
| 58 | |
Adam Cohen | 44729e3 | 2010-07-22 16:00:07 -0700 | [diff] [blame] | 59 | /** |
| 60 | * Represents where the in the current window of |
| 61 | * views the current <code>mDisplayedChild</code> sits |
| 62 | */ |
| 63 | int mActiveOffset = 0; |
| 64 | |
| 65 | /** |
| 66 | * The number of views that the {@link AdapterViewAnimator} keeps as children at any |
| 67 | * given time (not counting views that are pending removal, see {@link #mPreviousViews}). |
| 68 | */ |
| 69 | int mNumActiveViews = 1; |
| 70 | |
| 71 | /** |
| 72 | * Array of the children of the {@link AdapterViewAnimator}. This array |
| 73 | * is accessed in a circular fashion |
| 74 | */ |
| 75 | View[] mActiveViews; |
| 76 | |
| 77 | /** |
| 78 | * List of views pending removal from the {@link AdapterViewAnimator} |
| 79 | */ |
| 80 | ArrayList<View> mPreviousViews; |
| 81 | |
| 82 | /** |
| 83 | * The index, relative to the adapter, of the beginning of the window of views |
| 84 | */ |
| 85 | int mCurrentWindowStart = 0; |
| 86 | |
| 87 | /** |
| 88 | * The index, relative to the adapter, of the end of the window of views |
| 89 | */ |
| 90 | int mCurrentWindowEnd = -1; |
| 91 | |
| 92 | /** |
| 93 | * The same as {@link #mCurrentWindowStart}, except when the we have bounded |
| 94 | * {@link #mCurrentWindowStart} to be non-negative |
| 95 | */ |
| 96 | int mCurrentWindowStartUnbounded = 0; |
| 97 | |
| 98 | /** |
Adam Cohen | 44729e3 | 2010-07-22 16:00:07 -0700 | [diff] [blame] | 99 | * Handler to post events to the main thread |
| 100 | */ |
| 101 | Handler mMainQueue; |
| 102 | |
| 103 | /** |
| 104 | * Listens for data changes from the adapter |
| 105 | */ |
Adam Cohen | 3db4067 | 2010-07-19 22:41:57 -0700 | [diff] [blame] | 106 | AdapterDataSetObserver mDataSetObserver; |
| 107 | |
Adam Cohen | 44729e3 | 2010-07-22 16:00:07 -0700 | [diff] [blame] | 108 | /** |
| 109 | * The {@link Adapter} for this {@link AdapterViewAnimator} |
| 110 | */ |
| 111 | Adapter mAdapter; |
Adam Cohen | 3db4067 | 2010-07-19 22:41:57 -0700 | [diff] [blame] | 112 | |
Adam Cohen | 44729e3 | 2010-07-22 16:00:07 -0700 | [diff] [blame] | 113 | /** |
| 114 | * The {@link RemoteViewsAdapter} for this {@link AdapterViewAnimator} |
| 115 | */ |
| 116 | RemoteViewsAdapter mRemoteViewsAdapter; |
| 117 | |
| 118 | /** |
| 119 | * Specifies whether this is the first time the animator is showing views |
| 120 | */ |
| 121 | boolean mFirstTime = true; |
| 122 | |
| 123 | /** |
Adam Cohen | b04f7ad | 2010-08-15 13:22:42 -0700 | [diff] [blame^] | 124 | * Specifies if the animator should wrap from 0 to the end and vice versa |
| 125 | * or have hard boundaries at the beginning and end |
| 126 | */ |
| 127 | boolean mShouldLoop = true; |
| 128 | |
| 129 | /** |
Adam Cohen | 44729e3 | 2010-07-22 16:00:07 -0700 | [diff] [blame] | 130 | * TODO: Animation stuff is still in flux, waiting on the new framework to settle a bit. |
| 131 | */ |
Adam Cohen | 3db4067 | 2010-07-19 22:41:57 -0700 | [diff] [blame] | 132 | Animation mInAnimation; |
| 133 | Animation mOutAnimation; |
Adam Cohen | 44729e3 | 2010-07-22 16:00:07 -0700 | [diff] [blame] | 134 | private ArrayList<View> mViewsToBringToFront; |
Adam Cohen | 3db4067 | 2010-07-19 22:41:57 -0700 | [diff] [blame] | 135 | |
| 136 | public AdapterViewAnimator(Context context) { |
| 137 | super(context); |
Romain Guy | 5b53f91 | 2010-08-16 18:24:33 -0700 | [diff] [blame] | 138 | initViewAnimator(); |
Adam Cohen | 3db4067 | 2010-07-19 22:41:57 -0700 | [diff] [blame] | 139 | } |
| 140 | |
| 141 | public AdapterViewAnimator(Context context, AttributeSet attrs) { |
| 142 | super(context, attrs); |
| 143 | |
Adam Cohen | 44729e3 | 2010-07-22 16:00:07 -0700 | [diff] [blame] | 144 | TypedArray a = context.obtainStyledAttributes(attrs, |
| 145 | com.android.internal.R.styleable.ViewAnimator); |
| 146 | int resource = a.getResourceId( |
| 147 | com.android.internal.R.styleable.ViewAnimator_inAnimation, 0); |
Adam Cohen | 3db4067 | 2010-07-19 22:41:57 -0700 | [diff] [blame] | 148 | if (resource > 0) { |
| 149 | setInAnimation(context, resource); |
| 150 | } |
| 151 | |
| 152 | resource = a.getResourceId(com.android.internal.R.styleable.ViewAnimator_outAnimation, 0); |
| 153 | if (resource > 0) { |
| 154 | setOutAnimation(context, resource); |
| 155 | } |
| 156 | |
Adam Cohen | 44729e3 | 2010-07-22 16:00:07 -0700 | [diff] [blame] | 157 | boolean flag = a.getBoolean( |
| 158 | com.android.internal.R.styleable.ViewAnimator_animateFirstView, true); |
Adam Cohen | 3db4067 | 2010-07-19 22:41:57 -0700 | [diff] [blame] | 159 | setAnimateFirstView(flag); |
| 160 | |
| 161 | a.recycle(); |
| 162 | |
Romain Guy | 5b53f91 | 2010-08-16 18:24:33 -0700 | [diff] [blame] | 163 | initViewAnimator(); |
Adam Cohen | 3db4067 | 2010-07-19 22:41:57 -0700 | [diff] [blame] | 164 | } |
| 165 | |
| 166 | /** |
| 167 | * Initialize this {@link AdapterViewAnimator} |
| 168 | */ |
Romain Guy | 5b53f91 | 2010-08-16 18:24:33 -0700 | [diff] [blame] | 169 | private void initViewAnimator() { |
Adam Cohen | 3db4067 | 2010-07-19 22:41:57 -0700 | [diff] [blame] | 170 | mMainQueue = new Handler(Looper.myLooper()); |
Adam Cohen | 44729e3 | 2010-07-22 16:00:07 -0700 | [diff] [blame] | 171 | mActiveViews = new View[mNumActiveViews]; |
| 172 | mPreviousViews = new ArrayList<View>(); |
| 173 | mViewsToBringToFront = new ArrayList<View>(); |
| 174 | } |
| 175 | |
| 176 | /** |
| 177 | * This method is used by subclasses to configure the animator to display the |
| 178 | * desired number of views, and specify the offset |
| 179 | * |
| 180 | * @param numVisibleViews The number of views the animator keeps in the {@link ViewGroup} |
Romain Guy | 5b53f91 | 2010-08-16 18:24:33 -0700 | [diff] [blame] | 181 | * @param activeOffset This parameter specifies where the current index ({@link #mWhichChild}) |
Adam Cohen | 44729e3 | 2010-07-22 16:00:07 -0700 | [diff] [blame] | 182 | * sits within the window. For example if activeOffset is 1, and numVisibleViews is 3, |
Romain Guy | 5b53f91 | 2010-08-16 18:24:33 -0700 | [diff] [blame] | 183 | * and {@link #setDisplayedChild(int)} is called with 10, then the effective window will |
| 184 | * be the indexes 9, 10, and 11. In the same example, if activeOffset were 0, then the |
Adam Cohen | 44729e3 | 2010-07-22 16:00:07 -0700 | [diff] [blame] | 185 | * window would instead contain indexes 10, 11 and 12. |
Adam Cohen | b04f7ad | 2010-08-15 13:22:42 -0700 | [diff] [blame^] | 186 | * @param shouldLoop If the animator is show view 0, and setPrevious() is called, do we |
| 187 | * we loop back to the end, or do we do nothing |
Adam Cohen | 44729e3 | 2010-07-22 16:00:07 -0700 | [diff] [blame] | 188 | */ |
Adam Cohen | b04f7ad | 2010-08-15 13:22:42 -0700 | [diff] [blame^] | 189 | void configureViewAnimator(int numVisibleViews, int activeOffset, boolean shouldLoop) { |
Adam Cohen | 44729e3 | 2010-07-22 16:00:07 -0700 | [diff] [blame] | 190 | if (activeOffset > numVisibleViews - 1) { |
| 191 | // Throw an exception here. |
| 192 | } |
| 193 | mNumActiveViews = numVisibleViews; |
| 194 | mActiveOffset = activeOffset; |
| 195 | mActiveViews = new View[mNumActiveViews]; |
| 196 | mPreviousViews.clear(); |
| 197 | removeAllViewsInLayout(); |
| 198 | mCurrentWindowStart = 0; |
| 199 | mCurrentWindowEnd = -1; |
Adam Cohen | b04f7ad | 2010-08-15 13:22:42 -0700 | [diff] [blame^] | 200 | mShouldLoop = shouldLoop; |
Adam Cohen | 44729e3 | 2010-07-22 16:00:07 -0700 | [diff] [blame] | 201 | } |
| 202 | |
| 203 | /** |
| 204 | * This class should be overridden by subclasses to customize view transitions within |
| 205 | * the set of visible views |
| 206 | * |
| 207 | * @param fromIndex The relative index within the window that the view was in, -1 if it wasn't |
| 208 | * in the window |
| 209 | * @param toIndex The relative index within the window that the view is going to, -1 if it is |
| 210 | * being removed |
| 211 | * @param view The view that is being animated |
| 212 | */ |
| 213 | void animateViewForTransition(int fromIndex, int toIndex, View view) { |
| 214 | PropertyAnimator pa; |
| 215 | if (fromIndex == -1) { |
Adam Cohen | b04f7ad | 2010-08-15 13:22:42 -0700 | [diff] [blame^] | 216 | view.setAlpha(0.0f); |
Adam Cohen | 44729e3 | 2010-07-22 16:00:07 -0700 | [diff] [blame] | 217 | pa = new PropertyAnimator(400, view, "alpha", 0.0f, 1.0f); |
| 218 | pa.start(); |
| 219 | } else if (toIndex == -1) { |
| 220 | pa = new PropertyAnimator(400, view, "alpha", 1.0f, 0.0f); |
| 221 | pa.start(); |
| 222 | } |
Adam Cohen | 3db4067 | 2010-07-19 22:41:57 -0700 | [diff] [blame] | 223 | } |
| 224 | |
| 225 | /** |
| 226 | * Sets which child view will be displayed. |
| 227 | * |
| 228 | * @param whichChild the index of the child view to display |
| 229 | */ |
| 230 | public void setDisplayedChild(int whichChild) { |
| 231 | if (mAdapter != null) { |
| 232 | mWhichChild = whichChild; |
| 233 | if (whichChild >= mAdapter.getCount()) { |
Adam Cohen | b04f7ad | 2010-08-15 13:22:42 -0700 | [diff] [blame^] | 234 | mWhichChild = mShouldLoop ? 0 : mAdapter.getCount() - 1; |
Adam Cohen | 3db4067 | 2010-07-19 22:41:57 -0700 | [diff] [blame] | 235 | } else if (whichChild < 0) { |
Adam Cohen | b04f7ad | 2010-08-15 13:22:42 -0700 | [diff] [blame^] | 236 | mWhichChild = mShouldLoop ? mAdapter.getCount() - 1 : 0; |
Adam Cohen | 3db4067 | 2010-07-19 22:41:57 -0700 | [diff] [blame] | 237 | } |
| 238 | |
| 239 | boolean hasFocus = getFocusedChild() != null; |
| 240 | // This will clear old focus if we had it |
| 241 | showOnly(mWhichChild); |
| 242 | if (hasFocus) { |
| 243 | // Try to retake focus if we had it |
| 244 | requestFocus(FOCUS_FORWARD); |
| 245 | } |
| 246 | } |
| 247 | } |
| 248 | |
| 249 | /** |
| 250 | * Return default inAnimation. To be overriden by subclasses. |
| 251 | */ |
Adam Cohen | 44729e3 | 2010-07-22 16:00:07 -0700 | [diff] [blame] | 252 | Animation getDefaultInAnimation() { |
Adam Cohen | 3db4067 | 2010-07-19 22:41:57 -0700 | [diff] [blame] | 253 | return null; |
| 254 | } |
| 255 | |
| 256 | /** |
Adam Cohen | 44729e3 | 2010-07-22 16:00:07 -0700 | [diff] [blame] | 257 | * Return default outAnimation. To be overridden by subclasses. |
Adam Cohen | 3db4067 | 2010-07-19 22:41:57 -0700 | [diff] [blame] | 258 | */ |
Adam Cohen | 44729e3 | 2010-07-22 16:00:07 -0700 | [diff] [blame] | 259 | Animation getDefaultOutAnimation() { |
Adam Cohen | 3db4067 | 2010-07-19 22:41:57 -0700 | [diff] [blame] | 260 | return null; |
| 261 | } |
| 262 | |
| 263 | /** |
Adam Cohen | 44729e3 | 2010-07-22 16:00:07 -0700 | [diff] [blame] | 264 | * To be overridden by subclasses. This method applies a view / index specific |
| 265 | * transform to the child view. |
| 266 | * |
| 267 | * @param child |
| 268 | * @param relativeIndex |
| 269 | */ |
| 270 | void applyTransformForChildAtIndex(View child, int relativeIndex) { |
| 271 | } |
| 272 | |
| 273 | /** |
Adam Cohen | 3db4067 | 2010-07-19 22:41:57 -0700 | [diff] [blame] | 274 | * Returns the index of the currently displayed child view. |
| 275 | */ |
| 276 | public int getDisplayedChild() { |
| 277 | return mWhichChild; |
| 278 | } |
| 279 | |
| 280 | /** |
| 281 | * Manually shows the next child. |
| 282 | */ |
| 283 | public void showNext() { |
| 284 | setDisplayedChild(mWhichChild + 1); |
| 285 | } |
| 286 | |
| 287 | /** |
| 288 | * Manually shows the previous child. |
| 289 | */ |
| 290 | public void showPrevious() { |
| 291 | setDisplayedChild(mWhichChild - 1); |
| 292 | } |
| 293 | |
| 294 | /** |
| 295 | * Shows only the specified child. The other displays Views exit the screen, |
| 296 | * optionally with the with the {@link #getOutAnimation() out animation} and |
| 297 | * the specified child enters the screen, optionally with the |
| 298 | * {@link #getInAnimation() in animation}. |
| 299 | * |
| 300 | * @param childIndex The index of the child to be shown. |
| 301 | * @param animate Whether or not to use the in and out animations, defaults |
| 302 | * to true. |
| 303 | */ |
| 304 | void showOnly(int childIndex, boolean animate) { |
| 305 | showOnly(childIndex, animate, false); |
| 306 | } |
| 307 | |
Adam Cohen | 44729e3 | 2010-07-22 16:00:07 -0700 | [diff] [blame] | 308 | private int modulo(int pos, int size) { |
| 309 | return (size + (pos % size)) % size; |
Adam Cohen | 3db4067 | 2010-07-19 22:41:57 -0700 | [diff] [blame] | 310 | } |
| 311 | |
Adam Cohen | 44729e3 | 2010-07-22 16:00:07 -0700 | [diff] [blame] | 312 | /** |
| 313 | * Get the view at this index relative to the current window's start |
| 314 | * |
| 315 | * @param relativeIndex Position relative to the current window's start |
| 316 | * @return View at this index, null if the index is outside the bounds |
| 317 | */ |
| 318 | View getViewAtRelativeIndex(int relativeIndex) { |
| 319 | if (relativeIndex >= 0 && relativeIndex <= mNumActiveViews - 1) { |
| 320 | int index = mCurrentWindowStartUnbounded + relativeIndex; |
| 321 | return mActiveViews[modulo(index, mNumActiveViews)]; |
| 322 | } |
| 323 | return null; |
| 324 | } |
Adam Cohen | 3db4067 | 2010-07-19 22:41:57 -0700 | [diff] [blame] | 325 | |
Adam Cohen | 44729e3 | 2010-07-22 16:00:07 -0700 | [diff] [blame] | 326 | private LayoutParams createOrReuseLayoutParams(View v) { |
Romain Guy | 5b53f91 | 2010-08-16 18:24:33 -0700 | [diff] [blame] | 327 | final ViewGroup.LayoutParams currentLp = v.getLayoutParams(); |
Adam Cohen | 44729e3 | 2010-07-22 16:00:07 -0700 | [diff] [blame] | 328 | if (currentLp instanceof LayoutParams) { |
Adam Cohen | b04f7ad | 2010-08-15 13:22:42 -0700 | [diff] [blame^] | 329 | LayoutParams lp = (LayoutParams) currentLp; |
| 330 | lp.setHorizontalOffset(0); |
| 331 | lp.setVerticalOffset(0); |
| 332 | return lp; |
Adam Cohen | 44729e3 | 2010-07-22 16:00:07 -0700 | [diff] [blame] | 333 | } |
| 334 | return new LayoutParams(v); |
| 335 | } |
Adam Cohen | 3db4067 | 2010-07-19 22:41:57 -0700 | [diff] [blame] | 336 | |
Adam Cohen | 44729e3 | 2010-07-22 16:00:07 -0700 | [diff] [blame] | 337 | void showOnly(int childIndex, boolean animate, boolean onLayout) { |
| 338 | if (mAdapter == null) return; |
Adam Cohen | 3db4067 | 2010-07-19 22:41:57 -0700 | [diff] [blame] | 339 | |
Adam Cohen | 44729e3 | 2010-07-22 16:00:07 -0700 | [diff] [blame] | 340 | for (int i = 0; i < mPreviousViews.size(); i++) { |
| 341 | View viewToRemove = mPreviousViews.get(i); |
| 342 | viewToRemove.clearAnimation(); |
| 343 | // applyTransformForChildAtIndex here just allows for any cleanup |
| 344 | // associated with this view that may need to be done by a subclass |
| 345 | applyTransformForChildAtIndex(viewToRemove, -1); |
| 346 | removeViewInLayout(viewToRemove); |
| 347 | } |
| 348 | mPreviousViews.clear(); |
| 349 | int newWindowStartUnbounded = childIndex - mActiveOffset; |
| 350 | int newWindowEndUnbounded = newWindowStartUnbounded + mNumActiveViews - 1; |
| 351 | int newWindowStart = Math.max(0, newWindowStartUnbounded); |
| 352 | int newWindowEnd = Math.min(mAdapter.getCount(), newWindowEndUnbounded); |
Adam Cohen | 3db4067 | 2010-07-19 22:41:57 -0700 | [diff] [blame] | 353 | |
Adam Cohen | 44729e3 | 2010-07-22 16:00:07 -0700 | [diff] [blame] | 354 | // This section clears out any items that are in our mActiveViews list |
| 355 | // but are outside the effective bounds of our window (this is becomes an issue |
| 356 | // at the extremities of the list, eg. where newWindowStartUnbounded < 0 or |
| 357 | // newWindowEndUnbounded > mAdapter.getCount() - 1 |
| 358 | for (int i = newWindowStartUnbounded; i < newWindowEndUnbounded; i++) { |
| 359 | if (i < newWindowStart || i > newWindowEnd) { |
| 360 | int index = modulo(i, mNumActiveViews); |
| 361 | if (mActiveViews[index] != null) { |
| 362 | View previousView = mActiveViews[index]; |
| 363 | mPreviousViews.add(previousView); |
| 364 | int previousViewRelativeIndex = modulo(index - mCurrentWindowStart, |
| 365 | mNumActiveViews); |
| 366 | animateViewForTransition(previousViewRelativeIndex, -1, previousView); |
Adam Cohen | b04f7ad | 2010-08-15 13:22:42 -0700 | [diff] [blame^] | 367 | mActiveViews[index] = null; |
Adam Cohen | 3db4067 | 2010-07-19 22:41:57 -0700 | [diff] [blame] | 368 | } |
Adam Cohen | 3db4067 | 2010-07-19 22:41:57 -0700 | [diff] [blame] | 369 | } |
Adam Cohen | 44729e3 | 2010-07-22 16:00:07 -0700 | [diff] [blame] | 370 | } |
Adam Cohen | 3db4067 | 2010-07-19 22:41:57 -0700 | [diff] [blame] | 371 | |
Adam Cohen | 44729e3 | 2010-07-22 16:00:07 -0700 | [diff] [blame] | 372 | // If the window has changed |
| 373 | if (! (newWindowStart == mCurrentWindowStart && newWindowEnd == mCurrentWindowEnd)) { |
| 374 | // Run through the indices in the new range |
| 375 | for (int i = newWindowStart; i <= newWindowEnd; i++) { |
Adam Cohen | 3db4067 | 2010-07-19 22:41:57 -0700 | [diff] [blame] | 376 | |
Adam Cohen | 44729e3 | 2010-07-22 16:00:07 -0700 | [diff] [blame] | 377 | int oldRelativeIndex = i - mCurrentWindowStartUnbounded; |
| 378 | int newRelativeIndex = i - newWindowStartUnbounded; |
| 379 | int index = modulo(i, mNumActiveViews); |
| 380 | |
| 381 | // If this item is in the current window, great, we just need to apply |
| 382 | // the transform for it's new relative position in the window, and animate |
| 383 | // between it's current and new relative positions |
| 384 | if (i >= mCurrentWindowStart && i <= mCurrentWindowEnd) { |
| 385 | View view = mActiveViews[index]; |
| 386 | applyTransformForChildAtIndex(view, newRelativeIndex); |
| 387 | animateViewForTransition(oldRelativeIndex, newRelativeIndex, view); |
| 388 | |
| 389 | // Otherwise this view is new, so first we have to displace the view that's |
| 390 | // taking the new view's place within our cache (a circular array) |
| 391 | } else { |
| 392 | if (mActiveViews[index] != null) { |
| 393 | View previousView = mActiveViews[index]; |
| 394 | mPreviousViews.add(previousView); |
| 395 | int previousViewRelativeIndex = modulo(index - mCurrentWindowStart, |
| 396 | mNumActiveViews); |
| 397 | animateViewForTransition(previousViewRelativeIndex, -1, previousView); |
| 398 | |
| 399 | if (mCurrentWindowStart > newWindowStart) { |
| 400 | mViewsToBringToFront.add(previousView); |
| 401 | } |
Adam Cohen | 3db4067 | 2010-07-19 22:41:57 -0700 | [diff] [blame] | 402 | } |
Adam Cohen | 44729e3 | 2010-07-22 16:00:07 -0700 | [diff] [blame] | 403 | |
| 404 | // We've cleared a spot for the new view. Get it from the adapter, add it |
| 405 | // and apply any transform / animation |
| 406 | View newView = mAdapter.getView(i, null, this); |
| 407 | if (newView != null) { |
| 408 | mActiveViews[index] = newView; |
| 409 | addViewInLayout(newView, -1, createOrReuseLayoutParams(newView)); |
| 410 | applyTransformForChildAtIndex(newView, newRelativeIndex); |
| 411 | animateViewForTransition(-1, newRelativeIndex, newView); |
| 412 | } |
| 413 | } |
| 414 | mActiveViews[index].bringToFront(); |
Adam Cohen | 3db4067 | 2010-07-19 22:41:57 -0700 | [diff] [blame] | 415 | } |
Adam Cohen | 44729e3 | 2010-07-22 16:00:07 -0700 | [diff] [blame] | 416 | |
| 417 | for (int i = 0; i < mViewsToBringToFront.size(); i++) { |
| 418 | View v = mViewsToBringToFront.get(i); |
| 419 | v.bringToFront(); |
| 420 | } |
| 421 | mViewsToBringToFront.clear(); |
| 422 | |
| 423 | mCurrentWindowStart = newWindowStart; |
| 424 | mCurrentWindowEnd = newWindowEnd; |
| 425 | mCurrentWindowStartUnbounded = newWindowStartUnbounded; |
| 426 | } |
| 427 | |
| 428 | mFirstTime = false; |
| 429 | if (!onLayout) { |
| 430 | requestLayout(); |
| 431 | invalidate(); |
| 432 | } else { |
| 433 | // If the Adapter tries to layout the current view when we get it using getView |
| 434 | // above the layout will end up being ignored since we are currently laying out, so |
| 435 | // we post a delayed requestLayout and invalidate |
| 436 | mMainQueue.post(new Runnable() { |
| 437 | @Override |
| 438 | public void run() { |
| 439 | requestLayout(); |
| 440 | invalidate(); |
| 441 | } |
| 442 | }); |
Adam Cohen | 3db4067 | 2010-07-19 22:41:57 -0700 | [diff] [blame] | 443 | } |
| 444 | } |
| 445 | |
| 446 | @Override |
| 447 | protected void onLayout(boolean changed, int left, int top, int right, int bottom) { |
| 448 | boolean dataChanged = mDataChanged; |
| 449 | if (dataChanged) { |
| 450 | handleDataChanged(); |
| 451 | |
| 452 | // if the data changes, mWhichChild might be out of the bounds of the adapter |
| 453 | // in this case, we reset mWhichChild to the beginning |
| 454 | if (mWhichChild >= mAdapter.getCount()) |
| 455 | mWhichChild = 0; |
| 456 | |
| 457 | showOnly(mWhichChild, true, true); |
| 458 | } |
| 459 | |
| 460 | final int childCount = getChildCount(); |
| 461 | for (int i = 0; i < childCount; i++) { |
| 462 | final View child = getChildAt(i); |
| 463 | |
| 464 | int childRight = mPaddingLeft + child.getMeasuredWidth(); |
| 465 | int childBottom = mPaddingTop + child.getMeasuredHeight(); |
Adam Cohen | 44729e3 | 2010-07-22 16:00:07 -0700 | [diff] [blame] | 466 | LayoutParams lp = (LayoutParams) child.getLayoutParams(); |
Adam Cohen | 3db4067 | 2010-07-19 22:41:57 -0700 | [diff] [blame] | 467 | |
Adam Cohen | 44729e3 | 2010-07-22 16:00:07 -0700 | [diff] [blame] | 468 | child.layout(mPaddingLeft + lp.horizontalOffset, mPaddingTop + lp.verticalOffset, |
| 469 | childRight + lp.horizontalOffset, childBottom + lp.verticalOffset); |
Adam Cohen | 3db4067 | 2010-07-19 22:41:57 -0700 | [diff] [blame] | 470 | } |
Adam Cohen | 3db4067 | 2010-07-19 22:41:57 -0700 | [diff] [blame] | 471 | mDataChanged = false; |
| 472 | } |
| 473 | |
Adam Cohen | b04f7ad | 2010-08-15 13:22:42 -0700 | [diff] [blame^] | 474 | static class SavedState extends BaseSavedState { |
| 475 | int whichChild; |
| 476 | |
| 477 | /** |
| 478 | * Constructor called from {@link AdapterViewAnimator#onSaveInstanceState()} |
| 479 | */ |
| 480 | SavedState(Parcelable superState, int whichChild) { |
| 481 | super(superState); |
| 482 | this.whichChild = whichChild; |
| 483 | } |
| 484 | |
| 485 | /** |
| 486 | * Constructor called from {@link #CREATOR} |
| 487 | */ |
| 488 | private SavedState(Parcel in) { |
| 489 | super(in); |
| 490 | whichChild = in.readInt(); |
| 491 | } |
| 492 | |
| 493 | @Override |
| 494 | public void writeToParcel(Parcel out, int flags) { |
| 495 | super.writeToParcel(out, flags); |
| 496 | out.writeInt(whichChild); |
| 497 | } |
| 498 | |
| 499 | @Override |
| 500 | public String toString() { |
| 501 | return "AdapterViewAnimator.SavedState{ whichChild = " + whichChild + " }"; |
| 502 | } |
| 503 | |
| 504 | public static final Parcelable.Creator<SavedState> CREATOR |
| 505 | = new Parcelable.Creator<SavedState>() { |
| 506 | public SavedState createFromParcel(Parcel in) { |
| 507 | return new SavedState(in); |
| 508 | } |
| 509 | |
| 510 | public SavedState[] newArray(int size) { |
| 511 | return new SavedState[size]; |
| 512 | } |
| 513 | }; |
| 514 | } |
| 515 | |
| 516 | @Override |
| 517 | public Parcelable onSaveInstanceState() { |
| 518 | Parcelable superState = super.onSaveInstanceState(); |
| 519 | return new SavedState(superState, mWhichChild); |
| 520 | } |
| 521 | |
| 522 | @Override |
| 523 | public void onRestoreInstanceState(Parcelable state) { |
| 524 | SavedState ss = (SavedState) state; |
| 525 | super.onRestoreInstanceState(ss.getSuperState()); |
| 526 | |
| 527 | // Here we set mWhichChild in addition to setDisplayedChild |
| 528 | // We do the former in case mAdapter is null, and hence setDisplayedChild won't |
| 529 | // set mWhichChild |
| 530 | mWhichChild = ss.whichChild; |
| 531 | setDisplayedChild(mWhichChild); |
| 532 | } |
| 533 | |
Adam Cohen | 3db4067 | 2010-07-19 22:41:57 -0700 | [diff] [blame] | 534 | @Override |
| 535 | protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { |
| 536 | final int count = getChildCount(); |
| 537 | |
| 538 | int widthSpecSize = MeasureSpec.getSize(widthMeasureSpec); |
| 539 | int heightSpecSize = MeasureSpec.getSize(heightMeasureSpec); |
| 540 | |
Adam Cohen | 3db4067 | 2010-07-19 22:41:57 -0700 | [diff] [blame] | 541 | for (int i = 0; i < count; i++) { |
| 542 | final View child = getChildAt(i); |
| 543 | |
| 544 | final LayoutParams lp = (LayoutParams) child.getLayoutParams(); |
| 545 | |
| 546 | lp.width = widthSpecSize - mPaddingLeft - mPaddingRight; |
| 547 | lp.height = heightSpecSize - mPaddingTop - mPaddingBottom; |
| 548 | |
| 549 | int childWidthMeasureSpec = MeasureSpec.makeMeasureSpec(lp.width, |
| 550 | MeasureSpec.EXACTLY); |
| 551 | int childheightMeasureSpec = MeasureSpec.makeMeasureSpec(lp.height, |
| 552 | MeasureSpec.EXACTLY); |
| 553 | |
| 554 | child.measure(childWidthMeasureSpec, childheightMeasureSpec); |
| 555 | } |
Adam Cohen | 3db4067 | 2010-07-19 22:41:57 -0700 | [diff] [blame] | 556 | setMeasuredDimension(widthSpecSize, heightSpecSize); |
| 557 | } |
| 558 | |
| 559 | /** |
| 560 | * Shows only the specified child. The other displays Views exit the screen |
| 561 | * with the {@link #getOutAnimation() out animation} and the specified child |
| 562 | * enters the screen with the {@link #getInAnimation() in animation}. |
| 563 | * |
| 564 | * @param childIndex The index of the child to be shown. |
| 565 | */ |
| 566 | void showOnly(int childIndex) { |
| 567 | final boolean animate = (!mFirstTime || mAnimateFirstTime); |
| 568 | showOnly(childIndex, animate); |
| 569 | } |
| 570 | |
| 571 | /** |
| 572 | * Returns the View corresponding to the currently displayed child. |
| 573 | * |
| 574 | * @return The View currently displayed. |
| 575 | * |
| 576 | * @see #getDisplayedChild() |
| 577 | */ |
| 578 | public View getCurrentView() { |
Adam Cohen | 44729e3 | 2010-07-22 16:00:07 -0700 | [diff] [blame] | 579 | return getViewAtRelativeIndex(mActiveOffset); |
Adam Cohen | 3db4067 | 2010-07-19 22:41:57 -0700 | [diff] [blame] | 580 | } |
| 581 | |
| 582 | /** |
| 583 | * Returns the current animation used to animate a View that enters the screen. |
| 584 | * |
| 585 | * @return An Animation or null if none is set. |
| 586 | * |
| 587 | * @see #setInAnimation(android.view.animation.Animation) |
| 588 | * @see #setInAnimation(android.content.Context, int) |
| 589 | */ |
| 590 | public Animation getInAnimation() { |
| 591 | return mInAnimation; |
| 592 | } |
| 593 | |
| 594 | /** |
| 595 | * Specifies the animation used to animate a View that enters the screen. |
| 596 | * |
| 597 | * @param inAnimation The animation started when a View enters the screen. |
| 598 | * |
| 599 | * @see #getInAnimation() |
| 600 | * @see #setInAnimation(android.content.Context, int) |
| 601 | */ |
| 602 | public void setInAnimation(Animation inAnimation) { |
| 603 | mInAnimation = inAnimation; |
| 604 | } |
| 605 | |
| 606 | /** |
| 607 | * Returns the current animation used to animate a View that exits the screen. |
| 608 | * |
| 609 | * @return An Animation or null if none is set. |
| 610 | * |
| 611 | * @see #setOutAnimation(android.view.animation.Animation) |
| 612 | * @see #setOutAnimation(android.content.Context, int) |
| 613 | */ |
| 614 | public Animation getOutAnimation() { |
| 615 | return mOutAnimation; |
| 616 | } |
| 617 | |
| 618 | /** |
| 619 | * Specifies the animation used to animate a View that exit the screen. |
| 620 | * |
| 621 | * @param outAnimation The animation started when a View exit the screen. |
| 622 | * |
| 623 | * @see #getOutAnimation() |
| 624 | * @see #setOutAnimation(android.content.Context, int) |
| 625 | */ |
| 626 | public void setOutAnimation(Animation outAnimation) { |
| 627 | mOutAnimation = outAnimation; |
| 628 | } |
| 629 | |
| 630 | /** |
| 631 | * Specifies the animation used to animate a View that enters the screen. |
| 632 | * |
| 633 | * @param context The application's environment. |
| 634 | * @param resourceID The resource id of the animation. |
| 635 | * |
| 636 | * @see #getInAnimation() |
| 637 | * @see #setInAnimation(android.view.animation.Animation) |
| 638 | */ |
| 639 | public void setInAnimation(Context context, int resourceID) { |
| 640 | setInAnimation(AnimationUtils.loadAnimation(context, resourceID)); |
| 641 | } |
| 642 | |
| 643 | /** |
| 644 | * Specifies the animation used to animate a View that exit the screen. |
| 645 | * |
| 646 | * @param context The application's environment. |
| 647 | * @param resourceID The resource id of the animation. |
| 648 | * |
| 649 | * @see #getOutAnimation() |
| 650 | * @see #setOutAnimation(android.view.animation.Animation) |
| 651 | */ |
| 652 | public void setOutAnimation(Context context, int resourceID) { |
| 653 | setOutAnimation(AnimationUtils.loadAnimation(context, resourceID)); |
| 654 | } |
| 655 | |
| 656 | /** |
| 657 | * Indicates whether the current View should be animated the first time |
| 658 | * the ViewAnimation is displayed. |
| 659 | * |
| 660 | * @param animate True to animate the current View the first time it is displayed, |
| 661 | * false otherwise. |
| 662 | */ |
| 663 | public void setAnimateFirstView(boolean animate) { |
| 664 | mAnimateFirstTime = animate; |
| 665 | } |
| 666 | |
| 667 | @Override |
| 668 | public int getBaseline() { |
| 669 | return (getCurrentView() != null) ? getCurrentView().getBaseline() : super.getBaseline(); |
| 670 | } |
| 671 | |
| 672 | @Override |
| 673 | public Adapter getAdapter() { |
| 674 | return mAdapter; |
| 675 | } |
| 676 | |
| 677 | @Override |
| 678 | public void setAdapter(Adapter adapter) { |
Adam Cohen | 8322834 | 2010-08-10 16:47:30 -0700 | [diff] [blame] | 679 | if (mAdapter != null && mDataSetObserver != null) { |
| 680 | mAdapter.unregisterDataSetObserver(mDataSetObserver); |
| 681 | } |
| 682 | |
Adam Cohen | 3db4067 | 2010-07-19 22:41:57 -0700 | [diff] [blame] | 683 | mAdapter = adapter; |
| 684 | |
| 685 | if (mAdapter != null) { |
Adam Cohen | 3db4067 | 2010-07-19 22:41:57 -0700 | [diff] [blame] | 686 | mDataSetObserver = new AdapterDataSetObserver(); |
| 687 | mAdapter.registerDataSetObserver(mDataSetObserver); |
| 688 | } |
Adam Cohen | 44729e3 | 2010-07-22 16:00:07 -0700 | [diff] [blame] | 689 | setFocusable(true); |
Adam Cohen | 3db4067 | 2010-07-19 22:41:57 -0700 | [diff] [blame] | 690 | } |
| 691 | |
| 692 | /** |
Adam Cohen | 44729e3 | 2010-07-22 16:00:07 -0700 | [diff] [blame] | 693 | * Sets up this AdapterViewAnimator to use a remote views adapter which connects to a |
| 694 | * RemoteViewsService through the specified intent. |
| 695 | * |
| 696 | * @param intent the intent used to identify the RemoteViewsService for the adapter to |
| 697 | * connect to. |
Adam Cohen | 3db4067 | 2010-07-19 22:41:57 -0700 | [diff] [blame] | 698 | */ |
| 699 | @android.view.RemotableViewMethod |
| 700 | public void setRemoteViewsAdapter(Intent intent) { |
| 701 | mRemoteViewsAdapter = new RemoteViewsAdapter(getContext(), intent, this); |
| 702 | } |
| 703 | |
| 704 | @Override |
| 705 | public void setSelection(int position) { |
| 706 | setDisplayedChild(position); |
| 707 | } |
| 708 | |
| 709 | @Override |
| 710 | public View getSelectedView() { |
Adam Cohen | 44729e3 | 2010-07-22 16:00:07 -0700 | [diff] [blame] | 711 | return getViewAtRelativeIndex(mActiveOffset); |
Adam Cohen | 3db4067 | 2010-07-19 22:41:57 -0700 | [diff] [blame] | 712 | } |
| 713 | |
| 714 | /** |
| 715 | * Called back when the adapter connects to the RemoteViewsService. |
| 716 | */ |
| 717 | public void onRemoteAdapterConnected() { |
| 718 | if (mRemoteViewsAdapter != mAdapter) { |
| 719 | setAdapter(mRemoteViewsAdapter); |
| 720 | } |
| 721 | } |
| 722 | |
| 723 | /** |
| 724 | * Called back when the adapter disconnects from the RemoteViewsService. |
| 725 | */ |
| 726 | public void onRemoteAdapterDisconnected() { |
| 727 | if (mRemoteViewsAdapter != mAdapter) { |
| 728 | mRemoteViewsAdapter = null; |
| 729 | setAdapter(mRemoteViewsAdapter); |
| 730 | } |
| 731 | } |
Adam Cohen | 44729e3 | 2010-07-22 16:00:07 -0700 | [diff] [blame] | 732 | |
Adam Cohen | b04f7ad | 2010-08-15 13:22:42 -0700 | [diff] [blame^] | 733 | private final Rect dirtyRect = new Rect(); |
| 734 | @Override |
| 735 | public void removeViewInLayout(View view) { |
| 736 | // TODO: need to investigate this block a bit more |
| 737 | // and perhaps fix some other invalidations issues. |
| 738 | View parent = null; |
| 739 | view.setVisibility(INVISIBLE); |
| 740 | if (view.getLayoutParams() instanceof LayoutParams) { |
| 741 | LayoutParams lp = (LayoutParams) view.getLayoutParams(); |
| 742 | parent = lp.getParentAndDirtyRegion(dirtyRect); |
| 743 | } |
| 744 | |
| 745 | super.removeViewInLayout(view); |
| 746 | |
| 747 | if (parent != null) |
| 748 | parent.invalidate(dirtyRect.left, dirtyRect.top, dirtyRect.right, dirtyRect.bottom); |
| 749 | } |
| 750 | |
Adam Cohen | 44729e3 | 2010-07-22 16:00:07 -0700 | [diff] [blame] | 751 | static class LayoutParams extends ViewGroup.LayoutParams { |
| 752 | int horizontalOffset; |
| 753 | int verticalOffset; |
| 754 | View mView; |
| 755 | |
| 756 | LayoutParams(View view) { |
| 757 | super(0, 0); |
| 758 | horizontalOffset = 0; |
| 759 | verticalOffset = 0; |
| 760 | mView = view; |
| 761 | } |
| 762 | |
| 763 | LayoutParams(Context c, AttributeSet attrs) { |
| 764 | super(c, attrs); |
| 765 | horizontalOffset = 0; |
| 766 | verticalOffset = 0; |
| 767 | } |
| 768 | |
Adam Cohen | 44729e3 | 2010-07-22 16:00:07 -0700 | [diff] [blame] | 769 | private Rect parentRect = new Rect(); |
| 770 | void invalidateGlobalRegion(View v, Rect r) { |
| 771 | View p = v; |
| 772 | boolean firstPass = true; |
| 773 | parentRect.set(0, 0, 0, 0); |
| 774 | while (p.getParent() != null && p.getParent() instanceof View |
| 775 | && !parentRect.contains(r)) { |
| 776 | if (!firstPass) r.offset(p.getLeft() - p.getScrollX(), p.getTop() - p.getScrollY()); |
| 777 | firstPass = false; |
| 778 | p = (View) p.getParent(); |
| 779 | parentRect.set(p.getLeft() - p.getScrollX(), p.getTop() - p.getScrollY(), |
| 780 | p.getRight() - p.getScrollX(), p.getBottom() - p.getScrollY()); |
| 781 | } |
| 782 | p.invalidate(r.left, r.top, r.right, r.bottom); |
| 783 | } |
| 784 | |
Adam Cohen | b04f7ad | 2010-08-15 13:22:42 -0700 | [diff] [blame^] | 785 | public View getParentAndDirtyRegion(Rect globalRect) { |
| 786 | globalRect.set(mView.getLeft(), mView.getTop(), mView.getRight(), mView.getBottom()); |
| 787 | View p = mView; |
| 788 | boolean firstPass = true; |
| 789 | parentRect.set(0, 0, 0, 0); |
| 790 | while (p.getParent() != null && p.getParent() instanceof View |
| 791 | && !parentRect.contains(globalRect)) { |
| 792 | if (!firstPass) { |
| 793 | globalRect.offset(p.getLeft() - p.getScrollX(), p.getTop() - p.getScrollY()); |
| 794 | } |
| 795 | |
| 796 | firstPass = false; |
| 797 | p = (View) p.getParent(); |
| 798 | parentRect.set(p.getLeft() - p.getScrollX(), p.getTop() - p.getScrollY(), |
| 799 | p.getRight() - p.getScrollX(), p.getBottom() - p.getScrollY()); |
| 800 | } |
| 801 | return p; |
| 802 | } |
| 803 | |
Adam Cohen | 44729e3 | 2010-07-22 16:00:07 -0700 | [diff] [blame] | 804 | private Rect invalidateRect = new Rect(); |
| 805 | // This is public so that PropertyAnimator can access it |
| 806 | public void setVerticalOffset(int newVerticalOffset) { |
| 807 | int offsetDelta = newVerticalOffset - verticalOffset; |
| 808 | verticalOffset = newVerticalOffset; |
| 809 | if (mView != null) { |
| 810 | mView.requestLayout(); |
| 811 | int top = Math.min(mView.getTop() + offsetDelta, mView.getTop()); |
| 812 | int bottom = Math.max(mView.getBottom() + offsetDelta, mView.getBottom()); |
| 813 | invalidateRect.set(mView.getLeft(), top, mView.getRight(), bottom); |
| 814 | invalidateGlobalRegion(mView, invalidateRect); |
| 815 | } |
| 816 | } |
Adam Cohen | 32a42f1 | 2010-08-11 19:34:30 -0700 | [diff] [blame] | 817 | |
| 818 | public void setHorizontalOffset(int newHorizontalOffset) { |
| 819 | int offsetDelta = newHorizontalOffset - horizontalOffset; |
| 820 | horizontalOffset = newHorizontalOffset; |
| 821 | if (mView != null) { |
| 822 | mView.requestLayout(); |
| 823 | int left = Math.min(mView.getLeft() + offsetDelta, mView.getLeft()); |
| 824 | int right = Math.max(mView.getRight() + offsetDelta, mView.getRight()); |
| 825 | invalidateRect.set(left, mView.getTop(), right, mView.getBottom()); |
| 826 | invalidateGlobalRegion(mView, invalidateRect); |
| 827 | } |
| 828 | } |
Adam Cohen | 44729e3 | 2010-07-22 16:00:07 -0700 | [diff] [blame] | 829 | } |
Adam Cohen | 3db4067 | 2010-07-19 22:41:57 -0700 | [diff] [blame] | 830 | } |