The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2006 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 | |
| 19 | import android.content.Context; |
| 20 | import android.content.res.TypedArray; |
| 21 | import android.graphics.Canvas; |
| 22 | import android.graphics.Rect; |
| 23 | import android.graphics.Region; |
| 24 | import android.graphics.drawable.Drawable; |
| 25 | import android.util.AttributeSet; |
| 26 | import android.view.View; |
Dianne Hackborn | 958b9ad | 2009-03-31 18:00:36 -0700 | [diff] [blame] | 27 | import android.view.ViewDebug; |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 28 | import android.view.ViewGroup; |
| 29 | import android.view.Gravity; |
| 30 | import android.widget.RemoteViews.RemoteView; |
| 31 | |
Romain Guy | 9c95737 | 2011-01-04 17:39:43 -0800 | [diff] [blame] | 32 | import java.util.ArrayList; |
| 33 | |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 34 | |
| 35 | /** |
| 36 | * FrameLayout is designed to block out an area on the screen to display |
Romain Guy | 606e8cc | 2010-08-17 12:43:05 -0700 | [diff] [blame] | 37 | * a single item. You can add multiple children to a FrameLayout and control their |
| 38 | * position within the FrameLayout using {@link android.widget.FrameLayout.LayoutParams#gravity}. |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 39 | * Children are drawn in a stack, with the most recently added child on top. |
| 40 | * The size of the frame layout is the size of its largest child (plus padding), visible |
| 41 | * or not (if the FrameLayout's parent permits). Views that are GONE are used for sizing |
| 42 | * only if {@link #setMeasureAllChildren(boolean) setConsiderGoneChildrenWhenMeasuring()} |
| 43 | * is set to true. |
| 44 | * |
| 45 | * @attr ref android.R.styleable#FrameLayout_foreground |
| 46 | * @attr ref android.R.styleable#FrameLayout_foregroundGravity |
| 47 | * @attr ref android.R.styleable#FrameLayout_measureAllChildren |
| 48 | */ |
| 49 | @RemoteView |
| 50 | public class FrameLayout extends ViewGroup { |
Romain Guy | 9c95737 | 2011-01-04 17:39:43 -0800 | [diff] [blame] | 51 | private static final int DEFAULT_CHILD_GRAVITY = Gravity.TOP | Gravity.LEFT; |
| 52 | |
Konstantin Lopyrev | bea9516 | 2010-08-10 17:02:18 -0700 | [diff] [blame] | 53 | @ViewDebug.ExportedProperty(category = "measurement") |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 54 | boolean mMeasureAllChildren = false; |
| 55 | |
Konstantin Lopyrev | bea9516 | 2010-08-10 17:02:18 -0700 | [diff] [blame] | 56 | @ViewDebug.ExportedProperty(category = "drawing") |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 57 | private Drawable mForeground; |
Konstantin Lopyrev | bea9516 | 2010-08-10 17:02:18 -0700 | [diff] [blame] | 58 | |
| 59 | @ViewDebug.ExportedProperty(category = "padding") |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 60 | private int mForegroundPaddingLeft = 0; |
Konstantin Lopyrev | bea9516 | 2010-08-10 17:02:18 -0700 | [diff] [blame] | 61 | |
| 62 | @ViewDebug.ExportedProperty(category = "padding") |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 63 | private int mForegroundPaddingTop = 0; |
Konstantin Lopyrev | bea9516 | 2010-08-10 17:02:18 -0700 | [diff] [blame] | 64 | |
| 65 | @ViewDebug.ExportedProperty(category = "padding") |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 66 | private int mForegroundPaddingRight = 0; |
Konstantin Lopyrev | bea9516 | 2010-08-10 17:02:18 -0700 | [diff] [blame] | 67 | |
| 68 | @ViewDebug.ExportedProperty(category = "padding") |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 69 | private int mForegroundPaddingBottom = 0; |
| 70 | |
| 71 | private final Rect mSelfBounds = new Rect(); |
| 72 | private final Rect mOverlayBounds = new Rect(); |
Konstantin Lopyrev | bea9516 | 2010-08-10 17:02:18 -0700 | [diff] [blame] | 73 | |
| 74 | @ViewDebug.ExportedProperty(category = "drawing") |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 75 | private int mForegroundGravity = Gravity.FILL; |
Karl Rosaen | 883e7eb | 2009-03-24 18:55:19 -0700 | [diff] [blame] | 76 | |
| 77 | /** {@hide} */ |
Konstantin Lopyrev | bea9516 | 2010-08-10 17:02:18 -0700 | [diff] [blame] | 78 | @ViewDebug.ExportedProperty(category = "drawing") |
Karl Rosaen | 883e7eb | 2009-03-24 18:55:19 -0700 | [diff] [blame] | 79 | protected boolean mForegroundInPadding = true; |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 80 | |
Dianne Hackborn | 958b9ad | 2009-03-31 18:00:36 -0700 | [diff] [blame] | 81 | boolean mForegroundBoundsChanged = false; |
| 82 | |
Romain Guy | 9c95737 | 2011-01-04 17:39:43 -0800 | [diff] [blame] | 83 | private final ArrayList<View> mMatchParentChildren = new ArrayList<View>(1); |
| 84 | |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 85 | public FrameLayout(Context context) { |
| 86 | super(context); |
| 87 | } |
| 88 | |
| 89 | public FrameLayout(Context context, AttributeSet attrs) { |
| 90 | this(context, attrs, 0); |
| 91 | } |
| 92 | |
| 93 | public FrameLayout(Context context, AttributeSet attrs, int defStyle) { |
| 94 | super(context, attrs, defStyle); |
| 95 | |
| 96 | TypedArray a = context.obtainStyledAttributes(attrs, com.android.internal.R.styleable.FrameLayout, |
| 97 | defStyle, 0); |
| 98 | |
The Android Open Source Project | 1059253 | 2009-03-18 17:39:46 -0700 | [diff] [blame] | 99 | mForegroundGravity = a.getInt( |
| 100 | com.android.internal.R.styleable.FrameLayout_foregroundGravity, mForegroundGravity); |
| 101 | |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 102 | final Drawable d = a.getDrawable(com.android.internal.R.styleable.FrameLayout_foreground); |
| 103 | if (d != null) { |
| 104 | setForeground(d); |
| 105 | } |
| 106 | |
| 107 | if (a.getBoolean(com.android.internal.R.styleable.FrameLayout_measureAllChildren, false)) { |
| 108 | setMeasureAllChildren(true); |
| 109 | } |
| 110 | |
The Android Open Source Project | 1059253 | 2009-03-18 17:39:46 -0700 | [diff] [blame] | 111 | mForegroundInPadding = a.getBoolean( |
| 112 | com.android.internal.R.styleable.FrameLayout_foregroundInsidePadding, true); |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 113 | |
| 114 | a.recycle(); |
| 115 | } |
| 116 | |
| 117 | /** |
| 118 | * Describes how the foreground is positioned. Defaults to FILL. |
| 119 | * |
| 120 | * @param foregroundGravity See {@link android.view.Gravity} |
| 121 | * |
| 122 | * @attr ref android.R.styleable#FrameLayout_foregroundGravity |
| 123 | */ |
| 124 | @android.view.RemotableViewMethod |
| 125 | public void setForegroundGravity(int foregroundGravity) { |
| 126 | if (mForegroundGravity != foregroundGravity) { |
| 127 | if ((foregroundGravity & Gravity.HORIZONTAL_GRAVITY_MASK) == 0) { |
| 128 | foregroundGravity |= Gravity.LEFT; |
| 129 | } |
| 130 | |
| 131 | if ((foregroundGravity & Gravity.VERTICAL_GRAVITY_MASK) == 0) { |
| 132 | foregroundGravity |= Gravity.TOP; |
| 133 | } |
| 134 | |
| 135 | mForegroundGravity = foregroundGravity; |
The Android Open Source Project | 1059253 | 2009-03-18 17:39:46 -0700 | [diff] [blame] | 136 | |
| 137 | |
| 138 | if (mForegroundGravity == Gravity.FILL && mForeground != null) { |
| 139 | Rect padding = new Rect(); |
| 140 | if (mForeground.getPadding(padding)) { |
| 141 | mForegroundPaddingLeft = padding.left; |
| 142 | mForegroundPaddingTop = padding.top; |
| 143 | mForegroundPaddingRight = padding.right; |
| 144 | mForegroundPaddingBottom = padding.bottom; |
| 145 | } |
| 146 | } else { |
| 147 | mForegroundPaddingLeft = 0; |
| 148 | mForegroundPaddingTop = 0; |
| 149 | mForegroundPaddingRight = 0; |
| 150 | mForegroundPaddingBottom = 0; |
| 151 | } |
| 152 | |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 153 | requestLayout(); |
| 154 | } |
| 155 | } |
| 156 | |
| 157 | /** |
| 158 | * {@inheritDoc} |
| 159 | */ |
| 160 | @Override |
| 161 | protected boolean verifyDrawable(Drawable who) { |
| 162 | return super.verifyDrawable(who) || (who == mForeground); |
| 163 | } |
| 164 | |
Dianne Hackborn | e213677 | 2010-11-04 15:08:59 -0700 | [diff] [blame] | 165 | @Override |
| 166 | public void jumpDrawablesToCurrentState() { |
| 167 | super.jumpDrawablesToCurrentState(); |
| 168 | if (mForeground != null) mForeground.jumpToCurrentState(); |
| 169 | } |
| 170 | |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 171 | /** |
| 172 | * {@inheritDoc} |
| 173 | */ |
| 174 | @Override |
| 175 | protected void drawableStateChanged() { |
| 176 | super.drawableStateChanged(); |
| 177 | if (mForeground != null && mForeground.isStateful()) { |
| 178 | mForeground.setState(getDrawableState()); |
| 179 | } |
| 180 | } |
| 181 | |
| 182 | /** |
| 183 | * Returns a set of layout parameters with a width of |
Romain Guy | 980a938 | 2010-01-08 15:06:28 -0800 | [diff] [blame] | 184 | * {@link android.view.ViewGroup.LayoutParams#MATCH_PARENT}, |
| 185 | * and a height of {@link android.view.ViewGroup.LayoutParams#MATCH_PARENT}. |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 186 | */ |
| 187 | @Override |
| 188 | protected LayoutParams generateDefaultLayoutParams() { |
Romain Guy | 980a938 | 2010-01-08 15:06:28 -0800 | [diff] [blame] | 189 | return new LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT); |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 190 | } |
| 191 | |
| 192 | /** |
| 193 | * Supply a Drawable that is to be rendered on top of all of the child |
| 194 | * views in the frame layout. Any padding in the Drawable will be taken |
| 195 | * into account by ensuring that the children are inset to be placed |
| 196 | * inside of the padding area. |
| 197 | * |
| 198 | * @param drawable The Drawable to be drawn on top of the children. |
| 199 | * |
| 200 | * @attr ref android.R.styleable#FrameLayout_foreground |
| 201 | */ |
| 202 | public void setForeground(Drawable drawable) { |
| 203 | if (mForeground != drawable) { |
| 204 | if (mForeground != null) { |
| 205 | mForeground.setCallback(null); |
| 206 | unscheduleDrawable(mForeground); |
| 207 | } |
| 208 | |
| 209 | mForeground = drawable; |
| 210 | mForegroundPaddingLeft = 0; |
| 211 | mForegroundPaddingTop = 0; |
| 212 | mForegroundPaddingRight = 0; |
| 213 | mForegroundPaddingBottom = 0; |
| 214 | |
| 215 | if (drawable != null) { |
| 216 | setWillNotDraw(false); |
| 217 | drawable.setCallback(this); |
| 218 | if (drawable.isStateful()) { |
| 219 | drawable.setState(getDrawableState()); |
| 220 | } |
The Android Open Source Project | 1059253 | 2009-03-18 17:39:46 -0700 | [diff] [blame] | 221 | if (mForegroundGravity == Gravity.FILL) { |
| 222 | Rect padding = new Rect(); |
| 223 | if (drawable.getPadding(padding)) { |
| 224 | mForegroundPaddingLeft = padding.left; |
| 225 | mForegroundPaddingTop = padding.top; |
| 226 | mForegroundPaddingRight = padding.right; |
| 227 | mForegroundPaddingBottom = padding.bottom; |
| 228 | } |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 229 | } |
| 230 | } else { |
| 231 | setWillNotDraw(true); |
| 232 | } |
| 233 | requestLayout(); |
| 234 | invalidate(); |
| 235 | } |
| 236 | } |
| 237 | |
| 238 | /** |
| 239 | * Returns the drawable used as the foreground of this FrameLayout. The |
| 240 | * foreground drawable, if non-null, is always drawn on top of the children. |
| 241 | * |
| 242 | * @return A Drawable or null if no foreground was set. |
| 243 | */ |
| 244 | public Drawable getForeground() { |
| 245 | return mForeground; |
| 246 | } |
| 247 | |
| 248 | /** |
| 249 | * {@inheritDoc} |
| 250 | */ |
| 251 | @Override |
| 252 | protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { |
Romain Guy | 9c95737 | 2011-01-04 17:39:43 -0800 | [diff] [blame] | 253 | int count = getChildCount(); |
| 254 | |
| 255 | final boolean measureMatchParentChildren = |
| 256 | MeasureSpec.getMode(widthMeasureSpec) != MeasureSpec.EXACTLY || |
| 257 | MeasureSpec.getMode(heightMeasureSpec) != MeasureSpec.EXACTLY; |
| 258 | mMatchParentChildren.clear(); |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 259 | |
| 260 | int maxHeight = 0; |
| 261 | int maxWidth = 0; |
Dianne Hackborn | 189ee18 | 2010-12-02 21:48:53 -0800 | [diff] [blame] | 262 | int childState = 0; |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 263 | |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 264 | for (int i = 0; i < count; i++) { |
| 265 | final View child = getChildAt(i); |
| 266 | if (mMeasureAllChildren || child.getVisibility() != GONE) { |
| 267 | measureChildWithMargins(child, widthMeasureSpec, 0, heightMeasureSpec, 0); |
Adam Powell | 2b6be70 | 2011-01-08 16:44:07 -0800 | [diff] [blame] | 268 | final LayoutParams lp = (LayoutParams) child.getLayoutParams(); |
| 269 | maxWidth = Math.max(maxWidth, |
| 270 | child.getMeasuredWidth() + lp.leftMargin + lp.rightMargin); |
| 271 | maxHeight = Math.max(maxHeight, |
| 272 | child.getMeasuredHeight() + lp.topMargin + lp.bottomMargin); |
Dianne Hackborn | 189ee18 | 2010-12-02 21:48:53 -0800 | [diff] [blame] | 273 | childState = combineMeasuredStates(childState, child.getMeasuredState()); |
Romain Guy | 9c95737 | 2011-01-04 17:39:43 -0800 | [diff] [blame] | 274 | if (measureMatchParentChildren) { |
Romain Guy | 9c95737 | 2011-01-04 17:39:43 -0800 | [diff] [blame] | 275 | if (lp.width == LayoutParams.MATCH_PARENT || |
| 276 | lp.height == LayoutParams.MATCH_PARENT) { |
| 277 | mMatchParentChildren.add(child); |
| 278 | } |
| 279 | } |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 280 | } |
| 281 | } |
| 282 | |
| 283 | // Account for padding too |
| 284 | maxWidth += mPaddingLeft + mPaddingRight + mForegroundPaddingLeft + mForegroundPaddingRight; |
| 285 | maxHeight += mPaddingTop + mPaddingBottom + mForegroundPaddingTop + mForegroundPaddingBottom; |
| 286 | |
| 287 | // Check against our minimum height and width |
| 288 | maxHeight = Math.max(maxHeight, getSuggestedMinimumHeight()); |
| 289 | maxWidth = Math.max(maxWidth, getSuggestedMinimumWidth()); |
| 290 | |
| 291 | // Check against our foreground's minimum height and width |
| 292 | final Drawable drawable = getForeground(); |
| 293 | if (drawable != null) { |
| 294 | maxHeight = Math.max(maxHeight, drawable.getMinimumHeight()); |
| 295 | maxWidth = Math.max(maxWidth, drawable.getMinimumWidth()); |
| 296 | } |
| 297 | |
Dianne Hackborn | 189ee18 | 2010-12-02 21:48:53 -0800 | [diff] [blame] | 298 | setMeasuredDimension(resolveSizeAndState(maxWidth, widthMeasureSpec, childState), |
| 299 | resolveSizeAndState(maxHeight, heightMeasureSpec, |
Romain Guy | 9c95737 | 2011-01-04 17:39:43 -0800 | [diff] [blame] | 300 | childState << MEASURED_HEIGHT_STATE_SHIFT)); |
| 301 | |
Romain Guy | a174d7a | 2011-01-07 13:27:39 -0800 | [diff] [blame] | 302 | count = mMatchParentChildren.size(); |
| 303 | if (count > 1) { |
Romain Guy | 9c95737 | 2011-01-04 17:39:43 -0800 | [diff] [blame] | 304 | for (int i = 0; i < count; i++) { |
| 305 | final View child = mMatchParentChildren.get(i); |
| 306 | |
| 307 | final MarginLayoutParams lp = (MarginLayoutParams) child.getLayoutParams(); |
| 308 | int childWidthMeasureSpec; |
| 309 | int childHeightMeasureSpec; |
Romain Guy | a174d7a | 2011-01-07 13:27:39 -0800 | [diff] [blame] | 310 | |
Romain Guy | 9c95737 | 2011-01-04 17:39:43 -0800 | [diff] [blame] | 311 | if (lp.width == LayoutParams.MATCH_PARENT) { |
| 312 | childWidthMeasureSpec = MeasureSpec.makeMeasureSpec(getMeasuredWidth() - |
| 313 | mPaddingLeft - mPaddingRight - lp.leftMargin - lp.rightMargin, |
| 314 | MeasureSpec.EXACTLY); |
| 315 | } else { |
| 316 | childWidthMeasureSpec = getChildMeasureSpec(widthMeasureSpec, |
| 317 | mPaddingLeft + mPaddingRight + lp.leftMargin + lp.rightMargin, |
| 318 | lp.width); |
| 319 | } |
| 320 | |
| 321 | if (lp.height == LayoutParams.MATCH_PARENT) { |
| 322 | childHeightMeasureSpec = MeasureSpec.makeMeasureSpec(getMeasuredHeight() - |
| 323 | mPaddingTop - mPaddingBottom - lp.topMargin - lp.bottomMargin, |
| 324 | MeasureSpec.EXACTLY); |
| 325 | } else { |
Romain Guy | cf70dcb | 2011-01-07 11:03:20 -0800 | [diff] [blame] | 326 | childHeightMeasureSpec = getChildMeasureSpec(heightMeasureSpec, |
Romain Guy | 9c95737 | 2011-01-04 17:39:43 -0800 | [diff] [blame] | 327 | mPaddingTop + mPaddingBottom + lp.topMargin + lp.bottomMargin, |
| 328 | lp.height); |
| 329 | } |
| 330 | |
| 331 | child.measure(childWidthMeasureSpec, childHeightMeasureSpec); |
| 332 | } |
| 333 | } |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 334 | } |
| 335 | |
| 336 | /** |
| 337 | * {@inheritDoc} |
| 338 | */ |
| 339 | @Override |
| 340 | protected void onLayout(boolean changed, int left, int top, int right, int bottom) { |
| 341 | final int count = getChildCount(); |
| 342 | |
| 343 | final int parentLeft = mPaddingLeft + mForegroundPaddingLeft; |
| 344 | final int parentRight = right - left - mPaddingRight - mForegroundPaddingRight; |
| 345 | |
| 346 | final int parentTop = mPaddingTop + mForegroundPaddingTop; |
| 347 | final int parentBottom = bottom - top - mPaddingBottom - mForegroundPaddingBottom; |
| 348 | |
Dianne Hackborn | 958b9ad | 2009-03-31 18:00:36 -0700 | [diff] [blame] | 349 | mForegroundBoundsChanged = true; |
| 350 | |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 351 | for (int i = 0; i < count; i++) { |
| 352 | final View child = getChildAt(i); |
| 353 | if (child.getVisibility() != GONE) { |
| 354 | final LayoutParams lp = (LayoutParams) child.getLayoutParams(); |
| 355 | |
| 356 | final int width = child.getMeasuredWidth(); |
| 357 | final int height = child.getMeasuredHeight(); |
| 358 | |
Romain Guy | 9c95737 | 2011-01-04 17:39:43 -0800 | [diff] [blame] | 359 | int childLeft; |
| 360 | int childTop; |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 361 | |
Adam Powell | 5e0ae67 | 2010-12-06 21:33:04 -0800 | [diff] [blame] | 362 | int gravity = lp.gravity; |
| 363 | if (gravity == -1) { |
| 364 | gravity = DEFAULT_CHILD_GRAVITY; |
| 365 | } |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 366 | |
Adam Powell | 5e0ae67 | 2010-12-06 21:33:04 -0800 | [diff] [blame] | 367 | final int horizontalGravity = gravity & Gravity.HORIZONTAL_GRAVITY_MASK; |
| 368 | final int verticalGravity = gravity & Gravity.VERTICAL_GRAVITY_MASK; |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 369 | |
Adam Powell | 5e0ae67 | 2010-12-06 21:33:04 -0800 | [diff] [blame] | 370 | switch (horizontalGravity) { |
| 371 | case Gravity.LEFT: |
| 372 | childLeft = parentLeft + lp.leftMargin; |
| 373 | break; |
| 374 | case Gravity.CENTER_HORIZONTAL: |
| 375 | childLeft = parentLeft + (parentRight - parentLeft - width) / 2 + |
| 376 | lp.leftMargin - lp.rightMargin; |
| 377 | break; |
| 378 | case Gravity.RIGHT: |
| 379 | childLeft = parentRight - width - lp.rightMargin; |
| 380 | break; |
| 381 | default: |
| 382 | childLeft = parentLeft + lp.leftMargin; |
| 383 | } |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 384 | |
Adam Powell | 5e0ae67 | 2010-12-06 21:33:04 -0800 | [diff] [blame] | 385 | switch (verticalGravity) { |
| 386 | case Gravity.TOP: |
| 387 | childTop = parentTop + lp.topMargin; |
| 388 | break; |
| 389 | case Gravity.CENTER_VERTICAL: |
| 390 | childTop = parentTop + (parentBottom - parentTop - height) / 2 + |
| 391 | lp.topMargin - lp.bottomMargin; |
| 392 | break; |
| 393 | case Gravity.BOTTOM: |
| 394 | childTop = parentBottom - height - lp.bottomMargin; |
| 395 | break; |
| 396 | default: |
| 397 | childTop = parentTop + lp.topMargin; |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 398 | } |
| 399 | |
| 400 | child.layout(childLeft, childTop, childLeft + width, childTop + height); |
| 401 | } |
| 402 | } |
| 403 | } |
| 404 | |
| 405 | /** |
| 406 | * {@inheritDoc} |
| 407 | */ |
| 408 | @Override |
| 409 | protected void onSizeChanged(int w, int h, int oldw, int oldh) { |
| 410 | super.onSizeChanged(w, h, oldw, oldh); |
Dianne Hackborn | 958b9ad | 2009-03-31 18:00:36 -0700 | [diff] [blame] | 411 | mForegroundBoundsChanged = true; |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 412 | } |
| 413 | |
| 414 | /** |
| 415 | * {@inheritDoc} |
| 416 | */ |
| 417 | @Override |
| 418 | public void draw(Canvas canvas) { |
| 419 | super.draw(canvas); |
| 420 | |
| 421 | if (mForeground != null) { |
Dianne Hackborn | 958b9ad | 2009-03-31 18:00:36 -0700 | [diff] [blame] | 422 | final Drawable foreground = mForeground; |
Romain Guy | 82f3495 | 2009-05-24 18:40:45 -0700 | [diff] [blame] | 423 | |
Dianne Hackborn | 958b9ad | 2009-03-31 18:00:36 -0700 | [diff] [blame] | 424 | if (mForegroundBoundsChanged) { |
| 425 | mForegroundBoundsChanged = false; |
Romain Guy | 82f3495 | 2009-05-24 18:40:45 -0700 | [diff] [blame] | 426 | final Rect selfBounds = mSelfBounds; |
| 427 | final Rect overlayBounds = mOverlayBounds; |
Dianne Hackborn | 958b9ad | 2009-03-31 18:00:36 -0700 | [diff] [blame] | 428 | |
Romain Guy | 82f3495 | 2009-05-24 18:40:45 -0700 | [diff] [blame] | 429 | final int w = mRight-mLeft; |
| 430 | final int h = mBottom-mTop; |
Dianne Hackborn | 958b9ad | 2009-03-31 18:00:36 -0700 | [diff] [blame] | 431 | |
Romain Guy | 82f3495 | 2009-05-24 18:40:45 -0700 | [diff] [blame] | 432 | if (mForegroundInPadding) { |
| 433 | selfBounds.set(0, 0, w, h); |
| 434 | } else { |
| 435 | selfBounds.set(mPaddingLeft, mPaddingTop, w - mPaddingRight, h - mPaddingBottom); |
Dianne Hackborn | 958b9ad | 2009-03-31 18:00:36 -0700 | [diff] [blame] | 436 | } |
Romain Guy | 82f3495 | 2009-05-24 18:40:45 -0700 | [diff] [blame] | 437 | |
| 438 | Gravity.apply(mForegroundGravity, foreground.getIntrinsicWidth(), |
| 439 | foreground.getIntrinsicHeight(), selfBounds, overlayBounds); |
| 440 | foreground.setBounds(overlayBounds); |
Dianne Hackborn | 958b9ad | 2009-03-31 18:00:36 -0700 | [diff] [blame] | 441 | } |
| 442 | |
| 443 | foreground.draw(canvas); |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 444 | } |
| 445 | } |
| 446 | |
| 447 | /** |
| 448 | * {@inheritDoc} |
| 449 | */ |
| 450 | @Override |
| 451 | public boolean gatherTransparentRegion(Region region) { |
| 452 | boolean opaque = super.gatherTransparentRegion(region); |
| 453 | if (region != null && mForeground != null) { |
| 454 | applyDrawableToTransparentRegion(mForeground, region); |
| 455 | } |
| 456 | return opaque; |
| 457 | } |
| 458 | |
| 459 | /** |
| 460 | * Determines whether to measure all children or just those in |
| 461 | * the VISIBLE or INVISIBLE state when measuring. Defaults to false. |
| 462 | * @param measureAll true to consider children marked GONE, false otherwise. |
| 463 | * Default value is false. |
| 464 | * |
| 465 | * @attr ref android.R.styleable#FrameLayout_measureAllChildren |
| 466 | */ |
| 467 | @android.view.RemotableViewMethod |
| 468 | public void setMeasureAllChildren(boolean measureAll) { |
| 469 | mMeasureAllChildren = measureAll; |
| 470 | } |
| 471 | |
| 472 | /** |
| 473 | * Determines whether to measure all children or just those in |
| 474 | * the VISIBLE or INVISIBLE state when measuring. |
| 475 | */ |
| 476 | public boolean getConsiderGoneChildrenWhenMeasuring() { |
| 477 | return mMeasureAllChildren; |
| 478 | } |
| 479 | |
| 480 | /** |
| 481 | * {@inheritDoc} |
| 482 | */ |
| 483 | @Override |
| 484 | public LayoutParams generateLayoutParams(AttributeSet attrs) { |
| 485 | return new FrameLayout.LayoutParams(getContext(), attrs); |
| 486 | } |
| 487 | |
| 488 | /** |
| 489 | * {@inheritDoc} |
| 490 | */ |
| 491 | @Override |
| 492 | protected boolean checkLayoutParams(ViewGroup.LayoutParams p) { |
| 493 | return p instanceof LayoutParams; |
| 494 | } |
| 495 | |
| 496 | @Override |
| 497 | protected ViewGroup.LayoutParams generateLayoutParams(ViewGroup.LayoutParams p) { |
| 498 | return new LayoutParams(p); |
| 499 | } |
| 500 | |
| 501 | /** |
| 502 | * Per-child layout information for layouts that support margins. |
| 503 | * See {@link android.R.styleable#FrameLayout_Layout FrameLayout Layout Attributes} |
| 504 | * for a list of all child view attributes that this class supports. |
Romain Guy | 606e8cc | 2010-08-17 12:43:05 -0700 | [diff] [blame] | 505 | * |
| 506 | * @attr ref android.R.styleable#FrameLayout_Layout_layout_gravity |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 507 | */ |
| 508 | public static class LayoutParams extends MarginLayoutParams { |
| 509 | /** |
| 510 | * The gravity to apply with the View to which these layout parameters |
| 511 | * are associated. |
| 512 | * |
| 513 | * @see android.view.Gravity |
Romain Guy | 606e8cc | 2010-08-17 12:43:05 -0700 | [diff] [blame] | 514 | * |
| 515 | * @attr ref android.R.styleable#FrameLayout_Layout_layout_gravity |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 516 | */ |
| 517 | public int gravity = -1; |
| 518 | |
| 519 | /** |
| 520 | * {@inheritDoc} |
| 521 | */ |
| 522 | public LayoutParams(Context c, AttributeSet attrs) { |
| 523 | super(c, attrs); |
| 524 | |
| 525 | TypedArray a = c.obtainStyledAttributes(attrs, com.android.internal.R.styleable.FrameLayout_Layout); |
| 526 | gravity = a.getInt(com.android.internal.R.styleable.FrameLayout_Layout_layout_gravity, -1); |
| 527 | a.recycle(); |
| 528 | } |
| 529 | |
| 530 | /** |
| 531 | * {@inheritDoc} |
| 532 | */ |
| 533 | public LayoutParams(int width, int height) { |
| 534 | super(width, height); |
| 535 | } |
| 536 | |
| 537 | /** |
| 538 | * Creates a new set of layout parameters with the specified width, height |
| 539 | * and weight. |
| 540 | * |
Romain Guy | 980a938 | 2010-01-08 15:06:28 -0800 | [diff] [blame] | 541 | * @param width the width, either {@link #MATCH_PARENT}, |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 542 | * {@link #WRAP_CONTENT} or a fixed size in pixels |
Romain Guy | 980a938 | 2010-01-08 15:06:28 -0800 | [diff] [blame] | 543 | * @param height the height, either {@link #MATCH_PARENT}, |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 544 | * {@link #WRAP_CONTENT} or a fixed size in pixels |
| 545 | * @param gravity the gravity |
| 546 | * |
| 547 | * @see android.view.Gravity |
| 548 | */ |
| 549 | public LayoutParams(int width, int height, int gravity) { |
| 550 | super(width, height); |
| 551 | this.gravity = gravity; |
| 552 | } |
| 553 | |
| 554 | /** |
| 555 | * {@inheritDoc} |
| 556 | */ |
| 557 | public LayoutParams(ViewGroup.LayoutParams source) { |
| 558 | super(source); |
| 559 | } |
| 560 | |
| 561 | /** |
| 562 | * {@inheritDoc} |
| 563 | */ |
| 564 | public LayoutParams(ViewGroup.MarginLayoutParams source) { |
| 565 | super(source); |
| 566 | } |
| 567 | } |
| 568 | } |
| 569 | |