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.view; |
| 18 | |
Chet Haase | 21cd138 | 2010-09-01 17:42:29 -0700 | [diff] [blame] | 19 | import android.animation.LayoutTransition; |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 20 | import com.android.internal.R; |
| 21 | |
| 22 | import android.content.Context; |
Dianne Hackborn | e36d6e2 | 2010-02-17 19:46:25 -0800 | [diff] [blame] | 23 | import android.content.res.Configuration; |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 24 | import android.content.res.TypedArray; |
| 25 | import android.graphics.Bitmap; |
| 26 | import android.graphics.Canvas; |
Adam Powell | 6e34636 | 2010-07-23 10:18:23 -0700 | [diff] [blame] | 27 | import android.graphics.Matrix; |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 28 | import android.graphics.Paint; |
Christopher Tate | a53146c | 2010-09-07 11:57:52 -0700 | [diff] [blame] | 29 | import android.graphics.PointF; |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 30 | import android.graphics.Rect; |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 31 | import android.graphics.RectF; |
svetoslavganov | 75986cf | 2009-05-14 22:28:01 -0700 | [diff] [blame] | 32 | import android.graphics.Region; |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 33 | import android.os.Parcelable; |
| 34 | import android.os.SystemClock; |
| 35 | import android.util.AttributeSet; |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 36 | import android.util.Log; |
| 37 | import android.util.SparseArray; |
svetoslavganov | 75986cf | 2009-05-14 22:28:01 -0700 | [diff] [blame] | 38 | import android.view.accessibility.AccessibilityEvent; |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 39 | import android.view.animation.Animation; |
| 40 | import android.view.animation.AnimationUtils; |
| 41 | import android.view.animation.LayoutAnimationController; |
| 42 | import android.view.animation.Transformation; |
| 43 | |
| 44 | import java.util.ArrayList; |
| 45 | |
| 46 | /** |
| 47 | * <p> |
| 48 | * A <code>ViewGroup</code> is a special view that can contain other views |
| 49 | * (called children.) The view group is the base class for layouts and views |
| 50 | * containers. This class also defines the |
| 51 | * {@link android.view.ViewGroup.LayoutParams} class which serves as the base |
| 52 | * class for layouts parameters. |
| 53 | * </p> |
| 54 | * |
| 55 | * <p> |
| 56 | * Also see {@link LayoutParams} for layout attributes. |
| 57 | * </p> |
Romain Guy | d6a463a | 2009-05-21 23:10:10 -0700 | [diff] [blame] | 58 | * |
| 59 | * @attr ref android.R.styleable#ViewGroup_clipChildren |
| 60 | * @attr ref android.R.styleable#ViewGroup_clipToPadding |
| 61 | * @attr ref android.R.styleable#ViewGroup_layoutAnimation |
| 62 | * @attr ref android.R.styleable#ViewGroup_animationCache |
| 63 | * @attr ref android.R.styleable#ViewGroup_persistentDrawingCache |
| 64 | * @attr ref android.R.styleable#ViewGroup_alwaysDrawnWithCache |
| 65 | * @attr ref android.R.styleable#ViewGroup_addStatesFromChildren |
| 66 | * @attr ref android.R.styleable#ViewGroup_descendantFocusability |
Chet Haase | 13cc120 | 2010-09-03 15:39:20 -0700 | [diff] [blame] | 67 | * @attr ref android.R.styleable#ViewGroup_animateLayoutChanges |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 68 | */ |
| 69 | public abstract class ViewGroup extends View implements ViewParent, ViewManager { |
Chet Haase | 21cd138 | 2010-09-01 17:42:29 -0700 | [diff] [blame] | 70 | |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 71 | private static final boolean DBG = false; |
Romain Guy | dbc26d2 | 2010-10-11 17:58:29 -0700 | [diff] [blame] | 72 | |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 73 | /** |
| 74 | * Views which have been hidden or removed which need to be animated on |
| 75 | * their way out. |
| 76 | * This field should be made private, so it is hidden from the SDK. |
| 77 | * {@hide} |
| 78 | */ |
| 79 | protected ArrayList<View> mDisappearingChildren; |
| 80 | |
| 81 | /** |
| 82 | * Listener used to propagate events indicating when children are added |
| 83 | * and/or removed from a view group. |
| 84 | * This field should be made private, so it is hidden from the SDK. |
| 85 | * {@hide} |
| 86 | */ |
| 87 | protected OnHierarchyChangeListener mOnHierarchyChangeListener; |
| 88 | |
| 89 | // The view contained within this ViewGroup that has or contains focus. |
| 90 | private View mFocused; |
| 91 | |
Chet Haase | 4846032 | 2010-06-11 14:22:25 -0700 | [diff] [blame] | 92 | /** |
| 93 | * A Transformation used when drawing children, to |
| 94 | * apply on the child being drawn. |
| 95 | */ |
| 96 | private final Transformation mChildTransformation = new Transformation(); |
| 97 | |
| 98 | /** |
| 99 | * Used to track the current invalidation region. |
| 100 | */ |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 101 | private RectF mInvalidateRegion; |
| 102 | |
Chet Haase | 4846032 | 2010-06-11 14:22:25 -0700 | [diff] [blame] | 103 | /** |
| 104 | * A Transformation used to calculate a correct |
| 105 | * invalidation area when the application is autoscaled. |
| 106 | */ |
| 107 | private Transformation mInvalidationTransformation; |
| 108 | |
Christopher Tate | a53146c | 2010-09-07 11:57:52 -0700 | [diff] [blame] | 109 | // View currently under an ongoing drag |
| 110 | private View mCurrentDragView; |
| 111 | |
| 112 | // Does this group have a child that can accept the current drag payload? |
| 113 | private boolean mChildAcceptsDrag; |
| 114 | |
| 115 | // Used during drag dispatch |
| 116 | private final PointF mLocalPoint = new PointF(); |
| 117 | |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 118 | // Layout animation |
| 119 | private LayoutAnimationController mLayoutAnimationController; |
| 120 | private Animation.AnimationListener mAnimationListener; |
| 121 | |
Jeff Brown | 20e987b | 2010-08-23 12:01:02 -0700 | [diff] [blame] | 122 | // First touch target in the linked list of touch targets. |
| 123 | private TouchTarget mFirstTouchTarget; |
| 124 | |
| 125 | // Temporary arrays for splitting pointers. |
| 126 | private int[] mTmpPointerIndexMap; |
| 127 | private int[] mTmpPointerIds; |
| 128 | private MotionEvent.PointerCoords[] mTmpPointerCoords; |
| 129 | |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 130 | /** |
| 131 | * Internal flags. |
Romain Guy | 8506ab4 | 2009-06-11 17:35:47 -0700 | [diff] [blame] | 132 | * |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 133 | * This field should be made private, so it is hidden from the SDK. |
| 134 | * {@hide} |
| 135 | */ |
| 136 | protected int mGroupFlags; |
| 137 | |
| 138 | // When set, ViewGroup invalidates only the child's rectangle |
| 139 | // Set by default |
| 140 | private static final int FLAG_CLIP_CHILDREN = 0x1; |
| 141 | |
| 142 | // When set, ViewGroup excludes the padding area from the invalidate rectangle |
| 143 | // Set by default |
| 144 | private static final int FLAG_CLIP_TO_PADDING = 0x2; |
| 145 | |
| 146 | // When set, dispatchDraw() will invoke invalidate(); this is set by drawChild() when |
| 147 | // a child needs to be invalidated and FLAG_OPTIMIZE_INVALIDATE is set |
| 148 | private static final int FLAG_INVALIDATE_REQUIRED = 0x4; |
| 149 | |
| 150 | // When set, dispatchDraw() will run the layout animation and unset the flag |
| 151 | private static final int FLAG_RUN_ANIMATION = 0x8; |
| 152 | |
| 153 | // When set, there is either no layout animation on the ViewGroup or the layout |
| 154 | // animation is over |
| 155 | // Set by default |
| 156 | private static final int FLAG_ANIMATION_DONE = 0x10; |
| 157 | |
| 158 | // If set, this ViewGroup has padding; if unset there is no padding and we don't need |
| 159 | // to clip it, even if FLAG_CLIP_TO_PADDING is set |
| 160 | private static final int FLAG_PADDING_NOT_NULL = 0x20; |
| 161 | |
| 162 | // When set, this ViewGroup caches its children in a Bitmap before starting a layout animation |
| 163 | // Set by default |
| 164 | private static final int FLAG_ANIMATION_CACHE = 0x40; |
| 165 | |
| 166 | // When set, this ViewGroup converts calls to invalidate(Rect) to invalidate() during a |
| 167 | // layout animation; this avoid clobbering the hierarchy |
| 168 | // Automatically set when the layout animation starts, depending on the animation's |
| 169 | // characteristics |
| 170 | private static final int FLAG_OPTIMIZE_INVALIDATE = 0x80; |
| 171 | |
| 172 | // When set, the next call to drawChild() will clear mChildTransformation's matrix |
| 173 | private static final int FLAG_CLEAR_TRANSFORMATION = 0x100; |
| 174 | |
| 175 | // When set, this ViewGroup invokes mAnimationListener.onAnimationEnd() and removes |
| 176 | // the children's Bitmap caches if necessary |
| 177 | // This flag is set when the layout animation is over (after FLAG_ANIMATION_DONE is set) |
| 178 | private static final int FLAG_NOTIFY_ANIMATION_LISTENER = 0x200; |
| 179 | |
| 180 | /** |
| 181 | * When set, the drawing method will call {@link #getChildDrawingOrder(int, int)} |
| 182 | * to get the index of the child to draw for that iteration. |
Romain Guy | 293451e | 2009-11-04 13:59:48 -0800 | [diff] [blame] | 183 | * |
| 184 | * @hide |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 185 | */ |
| 186 | protected static final int FLAG_USE_CHILD_DRAWING_ORDER = 0x400; |
Romain Guy | 8506ab4 | 2009-06-11 17:35:47 -0700 | [diff] [blame] | 187 | |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 188 | /** |
| 189 | * When set, this ViewGroup supports static transformations on children; this causes |
| 190 | * {@link #getChildStaticTransformation(View, android.view.animation.Transformation)} to be |
| 191 | * invoked when a child is drawn. |
| 192 | * |
| 193 | * Any subclass overriding |
| 194 | * {@link #getChildStaticTransformation(View, android.view.animation.Transformation)} should |
| 195 | * set this flags in {@link #mGroupFlags}. |
Romain Guy | 8506ab4 | 2009-06-11 17:35:47 -0700 | [diff] [blame] | 196 | * |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 197 | * {@hide} |
| 198 | */ |
| 199 | protected static final int FLAG_SUPPORT_STATIC_TRANSFORMATIONS = 0x800; |
| 200 | |
| 201 | // When the previous drawChild() invocation used an alpha value that was lower than |
| 202 | // 1.0 and set it in mCachePaint |
| 203 | private static final int FLAG_ALPHA_LOWER_THAN_ONE = 0x1000; |
| 204 | |
| 205 | /** |
| 206 | * When set, this ViewGroup's drawable states also include those |
| 207 | * of its children. |
| 208 | */ |
| 209 | private static final int FLAG_ADD_STATES_FROM_CHILDREN = 0x2000; |
| 210 | |
| 211 | /** |
| 212 | * When set, this ViewGroup tries to always draw its children using their drawing cache. |
| 213 | */ |
| 214 | private static final int FLAG_ALWAYS_DRAWN_WITH_CACHE = 0x4000; |
| 215 | |
| 216 | /** |
| 217 | * When set, and if FLAG_ALWAYS_DRAWN_WITH_CACHE is not set, this ViewGroup will try to |
| 218 | * draw its children with their drawing cache. |
| 219 | */ |
| 220 | private static final int FLAG_CHILDREN_DRAWN_WITH_CACHE = 0x8000; |
| 221 | |
| 222 | /** |
| 223 | * When set, this group will go through its list of children to notify them of |
| 224 | * any drawable state change. |
| 225 | */ |
| 226 | private static final int FLAG_NOTIFY_CHILDREN_ON_DRAWABLE_STATE_CHANGE = 0x10000; |
| 227 | |
| 228 | private static final int FLAG_MASK_FOCUSABILITY = 0x60000; |
| 229 | |
| 230 | /** |
| 231 | * This view will get focus before any of its descendants. |
| 232 | */ |
| 233 | public static final int FOCUS_BEFORE_DESCENDANTS = 0x20000; |
| 234 | |
| 235 | /** |
| 236 | * This view will get focus only if none of its descendants want it. |
| 237 | */ |
| 238 | public static final int FOCUS_AFTER_DESCENDANTS = 0x40000; |
| 239 | |
| 240 | /** |
| 241 | * This view will block any of its descendants from getting focus, even |
| 242 | * if they are focusable. |
| 243 | */ |
| 244 | public static final int FOCUS_BLOCK_DESCENDANTS = 0x60000; |
| 245 | |
| 246 | /** |
| 247 | * Used to map between enum in attrubutes and flag values. |
| 248 | */ |
| 249 | private static final int[] DESCENDANT_FOCUSABILITY_FLAGS = |
| 250 | {FOCUS_BEFORE_DESCENDANTS, FOCUS_AFTER_DESCENDANTS, |
| 251 | FOCUS_BLOCK_DESCENDANTS}; |
| 252 | |
| 253 | /** |
| 254 | * When set, this ViewGroup should not intercept touch events. |
Adam Powell | 110486f | 2010-06-22 17:14:44 -0700 | [diff] [blame] | 255 | * {@hide} |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 256 | */ |
Adam Powell | 110486f | 2010-06-22 17:14:44 -0700 | [diff] [blame] | 257 | protected static final int FLAG_DISALLOW_INTERCEPT = 0x80000; |
Romain Guy | 8506ab4 | 2009-06-11 17:35:47 -0700 | [diff] [blame] | 258 | |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 259 | /** |
Adam Powell | 2b342f0 | 2010-08-18 18:14:13 -0700 | [diff] [blame] | 260 | * When set, this ViewGroup will split MotionEvents to multiple child Views when appropriate. |
| 261 | */ |
Adam Powell | f37df07 | 2010-09-17 16:22:49 -0700 | [diff] [blame] | 262 | private static final int FLAG_SPLIT_MOTION_EVENTS = 0x200000; |
Adam Powell | 2b342f0 | 2010-08-18 18:14:13 -0700 | [diff] [blame] | 263 | |
| 264 | /** |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 265 | * Indicates which types of drawing caches are to be kept in memory. |
| 266 | * This field should be made private, so it is hidden from the SDK. |
| 267 | * {@hide} |
| 268 | */ |
| 269 | protected int mPersistentDrawingCache; |
| 270 | |
| 271 | /** |
| 272 | * Used to indicate that no drawing cache should be kept in memory. |
| 273 | */ |
| 274 | public static final int PERSISTENT_NO_CACHE = 0x0; |
| 275 | |
| 276 | /** |
| 277 | * Used to indicate that the animation drawing cache should be kept in memory. |
| 278 | */ |
| 279 | public static final int PERSISTENT_ANIMATION_CACHE = 0x1; |
| 280 | |
| 281 | /** |
| 282 | * Used to indicate that the scrolling drawing cache should be kept in memory. |
| 283 | */ |
| 284 | public static final int PERSISTENT_SCROLLING_CACHE = 0x2; |
| 285 | |
| 286 | /** |
| 287 | * Used to indicate that all drawing caches should be kept in memory. |
| 288 | */ |
| 289 | public static final int PERSISTENT_ALL_CACHES = 0x3; |
| 290 | |
| 291 | /** |
| 292 | * We clip to padding when FLAG_CLIP_TO_PADDING and FLAG_PADDING_NOT_NULL |
| 293 | * are set at the same time. |
| 294 | */ |
| 295 | protected static final int CLIP_TO_PADDING_MASK = FLAG_CLIP_TO_PADDING | FLAG_PADDING_NOT_NULL; |
| 296 | |
| 297 | // Index of the child's left position in the mLocation array |
| 298 | private static final int CHILD_LEFT_INDEX = 0; |
| 299 | // Index of the child's top position in the mLocation array |
| 300 | private static final int CHILD_TOP_INDEX = 1; |
| 301 | |
| 302 | // Child views of this ViewGroup |
| 303 | private View[] mChildren; |
| 304 | // Number of valid children in the mChildren array, the rest should be null or not |
| 305 | // considered as children |
| 306 | private int mChildrenCount; |
| 307 | |
| 308 | private static final int ARRAY_INITIAL_CAPACITY = 12; |
| 309 | private static final int ARRAY_CAPACITY_INCREMENT = 12; |
| 310 | |
| 311 | // Used to draw cached views |
| 312 | private final Paint mCachePaint = new Paint(); |
| 313 | |
Chet Haase | 21cd138 | 2010-09-01 17:42:29 -0700 | [diff] [blame] | 314 | // Used to animate add/remove changes in layout |
| 315 | private LayoutTransition mTransition; |
| 316 | |
| 317 | // The set of views that are currently being transitioned. This list is used to track views |
| 318 | // being removed that should not actually be removed from the parent yet because they are |
| 319 | // being animated. |
| 320 | private ArrayList<View> mTransitioningViews; |
| 321 | |
Chet Haase | 5e25c2c | 2010-09-16 11:15:56 -0700 | [diff] [blame] | 322 | // List of children changing visibility. This is used to potentially keep rendering |
| 323 | // views during a transition when they otherwise would have become gone/invisible |
| 324 | private ArrayList<View> mVisibilityChangingChildren; |
| 325 | |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 326 | public ViewGroup(Context context) { |
| 327 | super(context); |
| 328 | initViewGroup(); |
| 329 | } |
| 330 | |
| 331 | public ViewGroup(Context context, AttributeSet attrs) { |
| 332 | super(context, attrs); |
| 333 | initViewGroup(); |
| 334 | initFromAttributes(context, attrs); |
| 335 | } |
| 336 | |
| 337 | public ViewGroup(Context context, AttributeSet attrs, int defStyle) { |
| 338 | super(context, attrs, defStyle); |
| 339 | initViewGroup(); |
| 340 | initFromAttributes(context, attrs); |
| 341 | } |
| 342 | |
| 343 | private void initViewGroup() { |
| 344 | // ViewGroup doesn't draw by default |
| 345 | setFlags(WILL_NOT_DRAW, DRAW_MASK); |
| 346 | mGroupFlags |= FLAG_CLIP_CHILDREN; |
| 347 | mGroupFlags |= FLAG_CLIP_TO_PADDING; |
| 348 | mGroupFlags |= FLAG_ANIMATION_DONE; |
| 349 | mGroupFlags |= FLAG_ANIMATION_CACHE; |
| 350 | mGroupFlags |= FLAG_ALWAYS_DRAWN_WITH_CACHE; |
| 351 | |
| 352 | setDescendantFocusability(FOCUS_BEFORE_DESCENDANTS); |
| 353 | |
| 354 | mChildren = new View[ARRAY_INITIAL_CAPACITY]; |
| 355 | mChildrenCount = 0; |
| 356 | |
| 357 | mCachePaint.setDither(false); |
| 358 | |
| 359 | mPersistentDrawingCache = PERSISTENT_SCROLLING_CACHE; |
| 360 | } |
| 361 | |
| 362 | private void initFromAttributes(Context context, AttributeSet attrs) { |
| 363 | TypedArray a = context.obtainStyledAttributes(attrs, |
| 364 | R.styleable.ViewGroup); |
| 365 | |
| 366 | final int N = a.getIndexCount(); |
| 367 | for (int i = 0; i < N; i++) { |
| 368 | int attr = a.getIndex(i); |
| 369 | switch (attr) { |
| 370 | case R.styleable.ViewGroup_clipChildren: |
| 371 | setClipChildren(a.getBoolean(attr, true)); |
| 372 | break; |
| 373 | case R.styleable.ViewGroup_clipToPadding: |
| 374 | setClipToPadding(a.getBoolean(attr, true)); |
| 375 | break; |
| 376 | case R.styleable.ViewGroup_animationCache: |
| 377 | setAnimationCacheEnabled(a.getBoolean(attr, true)); |
| 378 | break; |
| 379 | case R.styleable.ViewGroup_persistentDrawingCache: |
| 380 | setPersistentDrawingCache(a.getInt(attr, PERSISTENT_SCROLLING_CACHE)); |
| 381 | break; |
| 382 | case R.styleable.ViewGroup_addStatesFromChildren: |
| 383 | setAddStatesFromChildren(a.getBoolean(attr, false)); |
| 384 | break; |
| 385 | case R.styleable.ViewGroup_alwaysDrawnWithCache: |
| 386 | setAlwaysDrawnWithCacheEnabled(a.getBoolean(attr, true)); |
| 387 | break; |
| 388 | case R.styleable.ViewGroup_layoutAnimation: |
| 389 | int id = a.getResourceId(attr, -1); |
| 390 | if (id > 0) { |
| 391 | setLayoutAnimation(AnimationUtils.loadLayoutAnimation(mContext, id)); |
| 392 | } |
| 393 | break; |
| 394 | case R.styleable.ViewGroup_descendantFocusability: |
| 395 | setDescendantFocusability(DESCENDANT_FOCUSABILITY_FLAGS[a.getInt(attr, 0)]); |
| 396 | break; |
Adam Powell | 2b342f0 | 2010-08-18 18:14:13 -0700 | [diff] [blame] | 397 | case R.styleable.ViewGroup_splitMotionEvents: |
| 398 | setMotionEventSplittingEnabled(a.getBoolean(attr, false)); |
| 399 | break; |
Chet Haase | 13cc120 | 2010-09-03 15:39:20 -0700 | [diff] [blame] | 400 | case R.styleable.ViewGroup_animateLayoutChanges: |
| 401 | boolean animateLayoutChanges = a.getBoolean(attr, false); |
| 402 | if (animateLayoutChanges) { |
| 403 | setLayoutTransition(new LayoutTransition()); |
| 404 | } |
| 405 | break; |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 406 | } |
| 407 | } |
| 408 | |
| 409 | a.recycle(); |
| 410 | } |
| 411 | |
| 412 | /** |
| 413 | * Gets the descendant focusability of this view group. The descendant |
| 414 | * focusability defines the relationship between this view group and its |
| 415 | * descendants when looking for a view to take focus in |
| 416 | * {@link #requestFocus(int, android.graphics.Rect)}. |
| 417 | * |
| 418 | * @return one of {@link #FOCUS_BEFORE_DESCENDANTS}, {@link #FOCUS_AFTER_DESCENDANTS}, |
| 419 | * {@link #FOCUS_BLOCK_DESCENDANTS}. |
| 420 | */ |
Konstantin Lopyrev | bea9516 | 2010-08-10 17:02:18 -0700 | [diff] [blame] | 421 | @ViewDebug.ExportedProperty(category = "focus", mapping = { |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 422 | @ViewDebug.IntToString(from = FOCUS_BEFORE_DESCENDANTS, to = "FOCUS_BEFORE_DESCENDANTS"), |
| 423 | @ViewDebug.IntToString(from = FOCUS_AFTER_DESCENDANTS, to = "FOCUS_AFTER_DESCENDANTS"), |
| 424 | @ViewDebug.IntToString(from = FOCUS_BLOCK_DESCENDANTS, to = "FOCUS_BLOCK_DESCENDANTS") |
| 425 | }) |
| 426 | public int getDescendantFocusability() { |
| 427 | return mGroupFlags & FLAG_MASK_FOCUSABILITY; |
| 428 | } |
| 429 | |
| 430 | /** |
| 431 | * Set the descendant focusability of this view group. This defines the relationship |
| 432 | * between this view group and its descendants when looking for a view to |
| 433 | * take focus in {@link #requestFocus(int, android.graphics.Rect)}. |
| 434 | * |
| 435 | * @param focusability one of {@link #FOCUS_BEFORE_DESCENDANTS}, {@link #FOCUS_AFTER_DESCENDANTS}, |
| 436 | * {@link #FOCUS_BLOCK_DESCENDANTS}. |
| 437 | */ |
| 438 | public void setDescendantFocusability(int focusability) { |
| 439 | switch (focusability) { |
| 440 | case FOCUS_BEFORE_DESCENDANTS: |
| 441 | case FOCUS_AFTER_DESCENDANTS: |
| 442 | case FOCUS_BLOCK_DESCENDANTS: |
| 443 | break; |
| 444 | default: |
| 445 | throw new IllegalArgumentException("must be one of FOCUS_BEFORE_DESCENDANTS, " |
| 446 | + "FOCUS_AFTER_DESCENDANTS, FOCUS_BLOCK_DESCENDANTS"); |
| 447 | } |
| 448 | mGroupFlags &= ~FLAG_MASK_FOCUSABILITY; |
| 449 | mGroupFlags |= (focusability & FLAG_MASK_FOCUSABILITY); |
| 450 | } |
| 451 | |
| 452 | /** |
| 453 | * {@inheritDoc} |
| 454 | */ |
| 455 | @Override |
| 456 | void handleFocusGainInternal(int direction, Rect previouslyFocusedRect) { |
| 457 | if (mFocused != null) { |
| 458 | mFocused.unFocus(); |
| 459 | mFocused = null; |
| 460 | } |
| 461 | super.handleFocusGainInternal(direction, previouslyFocusedRect); |
| 462 | } |
| 463 | |
| 464 | /** |
| 465 | * {@inheritDoc} |
| 466 | */ |
| 467 | public void requestChildFocus(View child, View focused) { |
| 468 | if (DBG) { |
| 469 | System.out.println(this + " requestChildFocus()"); |
| 470 | } |
| 471 | if (getDescendantFocusability() == FOCUS_BLOCK_DESCENDANTS) { |
| 472 | return; |
| 473 | } |
| 474 | |
| 475 | // Unfocus us, if necessary |
| 476 | super.unFocus(); |
| 477 | |
| 478 | // We had a previous notion of who had focus. Clear it. |
| 479 | if (mFocused != child) { |
| 480 | if (mFocused != null) { |
| 481 | mFocused.unFocus(); |
| 482 | } |
| 483 | |
| 484 | mFocused = child; |
| 485 | } |
| 486 | if (mParent != null) { |
| 487 | mParent.requestChildFocus(this, focused); |
| 488 | } |
| 489 | } |
| 490 | |
| 491 | /** |
| 492 | * {@inheritDoc} |
| 493 | */ |
| 494 | public void focusableViewAvailable(View v) { |
| 495 | if (mParent != null |
| 496 | // shortcut: don't report a new focusable view if we block our descendants from |
| 497 | // getting focus |
| 498 | && (getDescendantFocusability() != FOCUS_BLOCK_DESCENDANTS) |
| 499 | // shortcut: don't report a new focusable view if we already are focused |
| 500 | // (and we don't prefer our descendants) |
| 501 | // |
| 502 | // note: knowing that mFocused is non-null is not a good enough reason |
| 503 | // to break the traversal since in that case we'd actually have to find |
| 504 | // the focused view and make sure it wasn't FOCUS_AFTER_DESCENDANTS and |
| 505 | // an ancestor of v; this will get checked for at ViewRoot |
| 506 | && !(isFocused() && getDescendantFocusability() != FOCUS_AFTER_DESCENDANTS)) { |
| 507 | mParent.focusableViewAvailable(v); |
| 508 | } |
| 509 | } |
| 510 | |
| 511 | /** |
| 512 | * {@inheritDoc} |
| 513 | */ |
| 514 | public boolean showContextMenuForChild(View originalView) { |
| 515 | return mParent != null && mParent.showContextMenuForChild(originalView); |
| 516 | } |
| 517 | |
| 518 | /** |
Adam Powell | 6e34636 | 2010-07-23 10:18:23 -0700 | [diff] [blame] | 519 | * {@inheritDoc} |
| 520 | */ |
| 521 | public ActionMode startActionModeForChild(View originalView, ActionMode.Callback callback) { |
| 522 | return mParent != null ? mParent.startActionModeForChild(originalView, callback) : null; |
| 523 | } |
| 524 | |
| 525 | /** |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 526 | * Find the nearest view in the specified direction that wants to take |
| 527 | * focus. |
| 528 | * |
| 529 | * @param focused The view that currently has focus |
| 530 | * @param direction One of FOCUS_UP, FOCUS_DOWN, FOCUS_LEFT, and |
| 531 | * FOCUS_RIGHT, or 0 for not applicable. |
| 532 | */ |
| 533 | public View focusSearch(View focused, int direction) { |
| 534 | if (isRootNamespace()) { |
| 535 | // root namespace means we should consider ourselves the top of the |
| 536 | // tree for focus searching; otherwise we could be focus searching |
| 537 | // into other tabs. see LocalActivityManager and TabHost for more info |
| 538 | return FocusFinder.getInstance().findNextFocus(this, focused, direction); |
| 539 | } else if (mParent != null) { |
| 540 | return mParent.focusSearch(focused, direction); |
| 541 | } |
| 542 | return null; |
| 543 | } |
| 544 | |
| 545 | /** |
| 546 | * {@inheritDoc} |
| 547 | */ |
| 548 | public boolean requestChildRectangleOnScreen(View child, Rect rectangle, boolean immediate) { |
| 549 | return false; |
| 550 | } |
| 551 | |
| 552 | /** |
| 553 | * {@inheritDoc} |
| 554 | */ |
| 555 | @Override |
| 556 | public boolean dispatchUnhandledMove(View focused, int direction) { |
| 557 | return mFocused != null && |
| 558 | mFocused.dispatchUnhandledMove(focused, direction); |
| 559 | } |
| 560 | |
| 561 | /** |
| 562 | * {@inheritDoc} |
| 563 | */ |
| 564 | public void clearChildFocus(View child) { |
| 565 | if (DBG) { |
| 566 | System.out.println(this + " clearChildFocus()"); |
| 567 | } |
| 568 | |
| 569 | mFocused = null; |
| 570 | if (mParent != null) { |
| 571 | mParent.clearChildFocus(this); |
| 572 | } |
| 573 | } |
| 574 | |
| 575 | /** |
| 576 | * {@inheritDoc} |
| 577 | */ |
| 578 | @Override |
| 579 | public void clearFocus() { |
| 580 | super.clearFocus(); |
| 581 | |
| 582 | // clear any child focus if it exists |
| 583 | if (mFocused != null) { |
| 584 | mFocused.clearFocus(); |
| 585 | } |
| 586 | } |
| 587 | |
| 588 | /** |
| 589 | * {@inheritDoc} |
| 590 | */ |
| 591 | @Override |
| 592 | void unFocus() { |
| 593 | if (DBG) { |
| 594 | System.out.println(this + " unFocus()"); |
| 595 | } |
| 596 | |
| 597 | super.unFocus(); |
| 598 | if (mFocused != null) { |
| 599 | mFocused.unFocus(); |
| 600 | } |
| 601 | mFocused = null; |
| 602 | } |
| 603 | |
| 604 | /** |
| 605 | * Returns the focused child of this view, if any. The child may have focus |
| 606 | * or contain focus. |
| 607 | * |
| 608 | * @return the focused child or null. |
| 609 | */ |
| 610 | public View getFocusedChild() { |
| 611 | return mFocused; |
| 612 | } |
| 613 | |
| 614 | /** |
| 615 | * Returns true if this view has or contains focus |
| 616 | * |
| 617 | * @return true if this view has or contains focus |
| 618 | */ |
| 619 | @Override |
| 620 | public boolean hasFocus() { |
| 621 | return (mPrivateFlags & FOCUSED) != 0 || mFocused != null; |
| 622 | } |
| 623 | |
| 624 | /* |
| 625 | * (non-Javadoc) |
| 626 | * |
| 627 | * @see android.view.View#findFocus() |
| 628 | */ |
| 629 | @Override |
| 630 | public View findFocus() { |
| 631 | if (DBG) { |
| 632 | System.out.println("Find focus in " + this + ": flags=" |
| 633 | + isFocused() + ", child=" + mFocused); |
| 634 | } |
| 635 | |
| 636 | if (isFocused()) { |
| 637 | return this; |
| 638 | } |
| 639 | |
| 640 | if (mFocused != null) { |
| 641 | return mFocused.findFocus(); |
| 642 | } |
| 643 | return null; |
| 644 | } |
| 645 | |
| 646 | /** |
| 647 | * {@inheritDoc} |
| 648 | */ |
| 649 | @Override |
| 650 | public boolean hasFocusable() { |
| 651 | if ((mViewFlags & VISIBILITY_MASK) != VISIBLE) { |
| 652 | return false; |
| 653 | } |
| 654 | |
| 655 | if (isFocusable()) { |
| 656 | return true; |
| 657 | } |
| 658 | |
| 659 | final int descendantFocusability = getDescendantFocusability(); |
| 660 | if (descendantFocusability != FOCUS_BLOCK_DESCENDANTS) { |
| 661 | final int count = mChildrenCount; |
| 662 | final View[] children = mChildren; |
| 663 | |
| 664 | for (int i = 0; i < count; i++) { |
| 665 | final View child = children[i]; |
| 666 | if (child.hasFocusable()) { |
| 667 | return true; |
| 668 | } |
| 669 | } |
| 670 | } |
| 671 | |
| 672 | return false; |
| 673 | } |
| 674 | |
| 675 | /** |
| 676 | * {@inheritDoc} |
| 677 | */ |
| 678 | @Override |
| 679 | public void addFocusables(ArrayList<View> views, int direction) { |
svetoslavganov | 75986cf | 2009-05-14 22:28:01 -0700 | [diff] [blame] | 680 | addFocusables(views, direction, FOCUSABLES_TOUCH_MODE); |
| 681 | } |
| 682 | |
| 683 | /** |
| 684 | * {@inheritDoc} |
| 685 | */ |
| 686 | @Override |
| 687 | public void addFocusables(ArrayList<View> views, int direction, int focusableMode) { |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 688 | final int focusableCount = views.size(); |
| 689 | |
| 690 | final int descendantFocusability = getDescendantFocusability(); |
| 691 | |
| 692 | if (descendantFocusability != FOCUS_BLOCK_DESCENDANTS) { |
| 693 | final int count = mChildrenCount; |
| 694 | final View[] children = mChildren; |
| 695 | |
| 696 | for (int i = 0; i < count; i++) { |
| 697 | final View child = children[i]; |
| 698 | if ((child.mViewFlags & VISIBILITY_MASK) == VISIBLE) { |
svetoslavganov | 75986cf | 2009-05-14 22:28:01 -0700 | [diff] [blame] | 699 | child.addFocusables(views, direction, focusableMode); |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 700 | } |
| 701 | } |
| 702 | } |
| 703 | |
| 704 | // we add ourselves (if focusable) in all cases except for when we are |
| 705 | // FOCUS_AFTER_DESCENDANTS and there are some descendants focusable. this is |
| 706 | // to avoid the focus search finding layouts when a more precise search |
| 707 | // among the focusable children would be more interesting. |
| 708 | if ( |
| 709 | descendantFocusability != FOCUS_AFTER_DESCENDANTS || |
| 710 | // No focusable descendants |
| 711 | (focusableCount == views.size())) { |
svetoslavganov | 75986cf | 2009-05-14 22:28:01 -0700 | [diff] [blame] | 712 | super.addFocusables(views, direction, focusableMode); |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 713 | } |
| 714 | } |
| 715 | |
| 716 | /** |
| 717 | * {@inheritDoc} |
| 718 | */ |
| 719 | @Override |
| 720 | public void dispatchWindowFocusChanged(boolean hasFocus) { |
| 721 | super.dispatchWindowFocusChanged(hasFocus); |
| 722 | final int count = mChildrenCount; |
| 723 | final View[] children = mChildren; |
| 724 | for (int i = 0; i < count; i++) { |
| 725 | children[i].dispatchWindowFocusChanged(hasFocus); |
| 726 | } |
| 727 | } |
| 728 | |
| 729 | /** |
| 730 | * {@inheritDoc} |
| 731 | */ |
| 732 | @Override |
| 733 | public void addTouchables(ArrayList<View> views) { |
| 734 | super.addTouchables(views); |
| 735 | |
| 736 | final int count = mChildrenCount; |
| 737 | final View[] children = mChildren; |
| 738 | |
| 739 | for (int i = 0; i < count; i++) { |
| 740 | final View child = children[i]; |
| 741 | if ((child.mViewFlags & VISIBILITY_MASK) == VISIBLE) { |
| 742 | child.addTouchables(views); |
| 743 | } |
| 744 | } |
| 745 | } |
Romain Guy | 43c9cdf | 2010-01-27 13:53:55 -0800 | [diff] [blame] | 746 | |
| 747 | /** |
| 748 | * {@inheritDoc} |
| 749 | */ |
| 750 | @Override |
| 751 | public void dispatchDisplayHint(int hint) { |
| 752 | super.dispatchDisplayHint(hint); |
| 753 | final int count = mChildrenCount; |
| 754 | final View[] children = mChildren; |
| 755 | for (int i = 0; i < count; i++) { |
| 756 | children[i].dispatchDisplayHint(hint); |
| 757 | } |
| 758 | } |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 759 | |
| 760 | /** |
Chet Haase | 5e25c2c | 2010-09-16 11:15:56 -0700 | [diff] [blame] | 761 | * @hide |
| 762 | * @param child |
| 763 | * @param visibility |
| 764 | */ |
| 765 | void onChildVisibilityChanged(View child, int visibility) { |
| 766 | if (mTransition != null) { |
| 767 | if (visibility == VISIBLE) { |
| 768 | mTransition.showChild(this, child); |
| 769 | } else { |
| 770 | mTransition.hideChild(this, child); |
| 771 | } |
| 772 | if (visibility != VISIBLE) { |
| 773 | // Only track this on disappearing views - appearing views are already visible |
| 774 | // and don't need special handling during drawChild() |
| 775 | if (mVisibilityChangingChildren == null) { |
| 776 | mVisibilityChangingChildren = new ArrayList<View>(); |
| 777 | } |
| 778 | mVisibilityChangingChildren.add(child); |
| 779 | if (mTransitioningViews != null && mTransitioningViews.contains(child)) { |
| 780 | addDisappearingView(child); |
| 781 | } |
| 782 | } |
| 783 | } |
| 784 | } |
| 785 | |
| 786 | /** |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 787 | * {@inheritDoc} |
| 788 | */ |
| 789 | @Override |
Adam Powell | 326d808 | 2009-12-09 15:10:07 -0800 | [diff] [blame] | 790 | protected void dispatchVisibilityChanged(View changedView, int visibility) { |
| 791 | super.dispatchVisibilityChanged(changedView, visibility); |
| 792 | final int count = mChildrenCount; |
| 793 | final View[] children = mChildren; |
| 794 | for (int i = 0; i < count; i++) { |
| 795 | children[i].dispatchVisibilityChanged(changedView, visibility); |
| 796 | } |
| 797 | } |
| 798 | |
| 799 | /** |
| 800 | * {@inheritDoc} |
| 801 | */ |
| 802 | @Override |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 803 | public void dispatchWindowVisibilityChanged(int visibility) { |
| 804 | super.dispatchWindowVisibilityChanged(visibility); |
| 805 | final int count = mChildrenCount; |
| 806 | final View[] children = mChildren; |
| 807 | for (int i = 0; i < count; i++) { |
| 808 | children[i].dispatchWindowVisibilityChanged(visibility); |
| 809 | } |
| 810 | } |
| 811 | |
| 812 | /** |
| 813 | * {@inheritDoc} |
| 814 | */ |
Dianne Hackborn | e36d6e2 | 2010-02-17 19:46:25 -0800 | [diff] [blame] | 815 | @Override |
| 816 | public void dispatchConfigurationChanged(Configuration newConfig) { |
| 817 | super.dispatchConfigurationChanged(newConfig); |
| 818 | final int count = mChildrenCount; |
| 819 | final View[] children = mChildren; |
| 820 | for (int i = 0; i < count; i++) { |
| 821 | children[i].dispatchConfigurationChanged(newConfig); |
| 822 | } |
| 823 | } |
| 824 | |
| 825 | /** |
| 826 | * {@inheritDoc} |
| 827 | */ |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 828 | public void recomputeViewAttributes(View child) { |
| 829 | ViewParent parent = mParent; |
| 830 | if (parent != null) parent.recomputeViewAttributes(this); |
| 831 | } |
Romain Guy | 8506ab4 | 2009-06-11 17:35:47 -0700 | [diff] [blame] | 832 | |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 833 | @Override |
| 834 | void dispatchCollectViewAttributes(int visibility) { |
| 835 | visibility |= mViewFlags&VISIBILITY_MASK; |
| 836 | super.dispatchCollectViewAttributes(visibility); |
| 837 | final int count = mChildrenCount; |
| 838 | final View[] children = mChildren; |
| 839 | for (int i = 0; i < count; i++) { |
| 840 | children[i].dispatchCollectViewAttributes(visibility); |
| 841 | } |
| 842 | } |
| 843 | |
| 844 | /** |
| 845 | * {@inheritDoc} |
| 846 | */ |
| 847 | public void bringChildToFront(View child) { |
| 848 | int index = indexOfChild(child); |
| 849 | if (index >= 0) { |
| 850 | removeFromArray(index); |
| 851 | addInArray(child, mChildrenCount); |
| 852 | child.mParent = this; |
| 853 | } |
| 854 | } |
| 855 | |
| 856 | /** |
| 857 | * {@inheritDoc} |
Christopher Tate | a53146c | 2010-09-07 11:57:52 -0700 | [diff] [blame] | 858 | * |
| 859 | * !!! TODO: write real docs |
| 860 | */ |
| 861 | @Override |
| 862 | public boolean dispatchDragEvent(DragEvent event) { |
| 863 | boolean retval = false; |
| 864 | final float tx = event.mX; |
| 865 | final float ty = event.mY; |
| 866 | |
Christopher Tate | 2c095f3 | 2010-10-04 14:13:40 -0700 | [diff] [blame] | 867 | ViewRoot root = getViewRoot(); |
Christopher Tate | a53146c | 2010-09-07 11:57:52 -0700 | [diff] [blame] | 868 | |
| 869 | // Dispatch down the view hierarchy |
| 870 | switch (event.mAction) { |
| 871 | case DragEvent.ACTION_DRAG_STARTED: { |
| 872 | // clear state to recalculate which views we drag over |
Chris Tate | 9d1ab88 | 2010-11-02 15:55:39 -0700 | [diff] [blame] | 873 | mCurrentDragView = null; |
Christopher Tate | a53146c | 2010-09-07 11:57:52 -0700 | [diff] [blame] | 874 | |
| 875 | // Now dispatch down to our children, caching the responses |
| 876 | mChildAcceptsDrag = false; |
| 877 | final int count = mChildrenCount; |
| 878 | final View[] children = mChildren; |
| 879 | for (int i = 0; i < count; i++) { |
Christopher Tate | 2c095f3 | 2010-10-04 14:13:40 -0700 | [diff] [blame] | 880 | final View child = children[i]; |
| 881 | if (child.getVisibility() == VISIBLE) { |
| 882 | final boolean handled = children[i].dispatchDragEvent(event); |
| 883 | children[i].mCanAcceptDrop = handled; |
| 884 | if (handled) { |
| 885 | mChildAcceptsDrag = true; |
| 886 | } |
Christopher Tate | a53146c | 2010-09-07 11:57:52 -0700 | [diff] [blame] | 887 | } |
| 888 | } |
| 889 | |
| 890 | // Return HANDLED if one of our children can accept the drag |
| 891 | if (mChildAcceptsDrag) { |
| 892 | retval = true; |
| 893 | } |
| 894 | } break; |
| 895 | |
| 896 | case DragEvent.ACTION_DRAG_ENDED: { |
| 897 | // Notify all of our children that the drag is over |
| 898 | final int count = mChildrenCount; |
| 899 | final View[] children = mChildren; |
| 900 | for (int i = 0; i < count; i++) { |
Christopher Tate | 2c095f3 | 2010-10-04 14:13:40 -0700 | [diff] [blame] | 901 | final View child = children[i]; |
| 902 | if (child.getVisibility() == VISIBLE) { |
| 903 | child.dispatchDragEvent(event); |
| 904 | } |
Christopher Tate | a53146c | 2010-09-07 11:57:52 -0700 | [diff] [blame] | 905 | } |
| 906 | // We consider drag-ended to have been handled if one of our children |
| 907 | // had offered to handle the drag. |
| 908 | if (mChildAcceptsDrag) { |
| 909 | retval = true; |
| 910 | } |
| 911 | } break; |
| 912 | |
| 913 | case DragEvent.ACTION_DRAG_LOCATION: { |
| 914 | // Find the [possibly new] drag target |
| 915 | final View target = findFrontmostDroppableChildAt(event.mX, event.mY, mLocalPoint); |
| 916 | |
| 917 | // If we've changed apparent drag target, tell the view root which view |
Chris Tate | 9d1ab88 | 2010-11-02 15:55:39 -0700 | [diff] [blame] | 918 | // we're over now [for purposes of the eventual drag-recipient-changed |
| 919 | // notifications to the framework] and tell the new target that the drag |
| 920 | // has entered its bounds. The root will see setDragFocus() calls all |
| 921 | // the way down to the final leaf view that is handling the LOCATION event |
| 922 | // before reporting the new potential recipient to the framework. |
Christopher Tate | a53146c | 2010-09-07 11:57:52 -0700 | [diff] [blame] | 923 | if (mCurrentDragView != target) { |
Chris Tate | 9d1ab88 | 2010-11-02 15:55:39 -0700 | [diff] [blame] | 924 | root.setDragFocus(target); |
| 925 | |
| 926 | final int action = event.mAction; |
| 927 | // If we've dragged off of a child view, send it the EXITED message |
| 928 | if (mCurrentDragView != null) { |
| 929 | event.mAction = DragEvent.ACTION_DRAG_EXITED; |
| 930 | mCurrentDragView.dispatchDragEvent(event); |
| 931 | } |
Christopher Tate | a53146c | 2010-09-07 11:57:52 -0700 | [diff] [blame] | 932 | mCurrentDragView = target; |
Chris Tate | 9d1ab88 | 2010-11-02 15:55:39 -0700 | [diff] [blame] | 933 | |
| 934 | // If we've dragged over a new child view, send it the ENTERED message |
| 935 | if (target != null) { |
| 936 | event.mAction = DragEvent.ACTION_DRAG_ENTERED; |
| 937 | target.dispatchDragEvent(event); |
| 938 | } |
| 939 | event.mAction = action; // restore the event's original state |
Christopher Tate | a53146c | 2010-09-07 11:57:52 -0700 | [diff] [blame] | 940 | } |
Christopher Tate | 2c095f3 | 2010-10-04 14:13:40 -0700 | [diff] [blame] | 941 | |
Christopher Tate | a53146c | 2010-09-07 11:57:52 -0700 | [diff] [blame] | 942 | // Dispatch the actual drag location notice, localized into its coordinates |
| 943 | if (target != null) { |
| 944 | event.mX = mLocalPoint.x; |
| 945 | event.mY = mLocalPoint.y; |
| 946 | |
| 947 | retval = target.dispatchDragEvent(event); |
| 948 | |
| 949 | event.mX = tx; |
| 950 | event.mY = ty; |
| 951 | } |
| 952 | } break; |
| 953 | |
Chris Tate | 9d1ab88 | 2010-11-02 15:55:39 -0700 | [diff] [blame] | 954 | /* Entered / exited dispatch |
| 955 | * |
| 956 | * DRAG_ENTERED is not dispatched downwards from ViewGroup. The reason for this is |
| 957 | * that we're about to get the corresponding LOCATION event, which we will use to |
| 958 | * determine which of our children is the new target; at that point we will |
| 959 | * push a DRAG_ENTERED down to the new target child [which may itself be a ViewGroup]. |
| 960 | * |
| 961 | * DRAG_EXITED *is* dispatched all the way down immediately: once we know the |
| 962 | * drag has left this ViewGroup, we know by definition that every contained subview |
| 963 | * is also no longer under the drag point. |
| 964 | */ |
| 965 | |
| 966 | case DragEvent.ACTION_DRAG_EXITED: { |
| 967 | if (mCurrentDragView != null) { |
| 968 | mCurrentDragView.dispatchDragEvent(event); |
| 969 | mCurrentDragView = null; |
| 970 | } |
| 971 | } break; |
| 972 | |
Christopher Tate | a53146c | 2010-09-07 11:57:52 -0700 | [diff] [blame] | 973 | case DragEvent.ACTION_DROP: { |
Christopher Tate | 2c095f3 | 2010-10-04 14:13:40 -0700 | [diff] [blame] | 974 | if (ViewDebug.DEBUG_DRAG) Log.d(View.VIEW_LOG_TAG, "Drop event: " + event); |
Christopher Tate | a53146c | 2010-09-07 11:57:52 -0700 | [diff] [blame] | 975 | View target = findFrontmostDroppableChildAt(event.mX, event.mY, mLocalPoint); |
| 976 | if (target != null) { |
Christopher Tate | 5ada6cb | 2010-10-05 14:15:29 -0700 | [diff] [blame] | 977 | if (ViewDebug.DEBUG_DRAG) Log.d(View.VIEW_LOG_TAG, " dispatch drop to " + target); |
Christopher Tate | a53146c | 2010-09-07 11:57:52 -0700 | [diff] [blame] | 978 | event.mX = mLocalPoint.x; |
| 979 | event.mY = mLocalPoint.y; |
| 980 | retval = target.dispatchDragEvent(event); |
| 981 | event.mX = tx; |
| 982 | event.mY = ty; |
Christopher Tate | 5ada6cb | 2010-10-05 14:15:29 -0700 | [diff] [blame] | 983 | } else { |
| 984 | if (ViewDebug.DEBUG_DRAG) { |
| 985 | Log.d(View.VIEW_LOG_TAG, " not dropped on an accepting view"); |
| 986 | } |
Christopher Tate | a53146c | 2010-09-07 11:57:52 -0700 | [diff] [blame] | 987 | } |
| 988 | } break; |
| 989 | } |
| 990 | |
| 991 | // If none of our children could handle the event, try here |
| 992 | if (!retval) { |
Chris Tate | 32affef | 2010-10-18 15:29:21 -0700 | [diff] [blame] | 993 | // Call up to the View implementation that dispatches to installed listeners |
| 994 | retval = super.dispatchDragEvent(event); |
Christopher Tate | a53146c | 2010-09-07 11:57:52 -0700 | [diff] [blame] | 995 | } |
| 996 | return retval; |
| 997 | } |
| 998 | |
| 999 | // Find the frontmost child view that lies under the given point, and calculate |
| 1000 | // the position within its own local coordinate system. |
| 1001 | View findFrontmostDroppableChildAt(float x, float y, PointF outLocalPoint) { |
Christopher Tate | a53146c | 2010-09-07 11:57:52 -0700 | [diff] [blame] | 1002 | final int count = mChildrenCount; |
| 1003 | final View[] children = mChildren; |
| 1004 | for (int i = count - 1; i >= 0; i--) { |
| 1005 | final View child = children[i]; |
Romain Guy | 469b1db | 2010-10-05 11:49:57 -0700 | [diff] [blame] | 1006 | if (!child.mCanAcceptDrop) { |
Christopher Tate | a53146c | 2010-09-07 11:57:52 -0700 | [diff] [blame] | 1007 | continue; |
| 1008 | } |
| 1009 | |
Christopher Tate | 2c095f3 | 2010-10-04 14:13:40 -0700 | [diff] [blame] | 1010 | if (isTransformedTouchPointInView(x, y, child, outLocalPoint)) { |
Christopher Tate | a53146c | 2010-09-07 11:57:52 -0700 | [diff] [blame] | 1011 | return child; |
| 1012 | } |
| 1013 | } |
| 1014 | return null; |
| 1015 | } |
| 1016 | |
| 1017 | /** |
| 1018 | * {@inheritDoc} |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 1019 | */ |
| 1020 | @Override |
| 1021 | public boolean dispatchKeyEventPreIme(KeyEvent event) { |
| 1022 | if ((mPrivateFlags & (FOCUSED | HAS_BOUNDS)) == (FOCUSED | HAS_BOUNDS)) { |
| 1023 | return super.dispatchKeyEventPreIme(event); |
| 1024 | } else if (mFocused != null && (mFocused.mPrivateFlags & HAS_BOUNDS) == HAS_BOUNDS) { |
| 1025 | return mFocused.dispatchKeyEventPreIme(event); |
| 1026 | } |
| 1027 | return false; |
| 1028 | } |
| 1029 | |
| 1030 | /** |
| 1031 | * {@inheritDoc} |
| 1032 | */ |
| 1033 | @Override |
| 1034 | public boolean dispatchKeyEvent(KeyEvent event) { |
| 1035 | if ((mPrivateFlags & (FOCUSED | HAS_BOUNDS)) == (FOCUSED | HAS_BOUNDS)) { |
| 1036 | return super.dispatchKeyEvent(event); |
| 1037 | } else if (mFocused != null && (mFocused.mPrivateFlags & HAS_BOUNDS) == HAS_BOUNDS) { |
| 1038 | return mFocused.dispatchKeyEvent(event); |
| 1039 | } |
| 1040 | return false; |
| 1041 | } |
| 1042 | |
| 1043 | /** |
| 1044 | * {@inheritDoc} |
| 1045 | */ |
| 1046 | @Override |
| 1047 | public boolean dispatchKeyShortcutEvent(KeyEvent event) { |
| 1048 | if ((mPrivateFlags & (FOCUSED | HAS_BOUNDS)) == (FOCUSED | HAS_BOUNDS)) { |
| 1049 | return super.dispatchKeyShortcutEvent(event); |
| 1050 | } else if (mFocused != null && (mFocused.mPrivateFlags & HAS_BOUNDS) == HAS_BOUNDS) { |
| 1051 | return mFocused.dispatchKeyShortcutEvent(event); |
| 1052 | } |
| 1053 | return false; |
| 1054 | } |
| 1055 | |
| 1056 | /** |
| 1057 | * {@inheritDoc} |
| 1058 | */ |
| 1059 | @Override |
| 1060 | public boolean dispatchTrackballEvent(MotionEvent event) { |
| 1061 | if ((mPrivateFlags & (FOCUSED | HAS_BOUNDS)) == (FOCUSED | HAS_BOUNDS)) { |
| 1062 | return super.dispatchTrackballEvent(event); |
| 1063 | } else if (mFocused != null && (mFocused.mPrivateFlags & HAS_BOUNDS) == HAS_BOUNDS) { |
| 1064 | return mFocused.dispatchTrackballEvent(event); |
| 1065 | } |
| 1066 | return false; |
| 1067 | } |
| 1068 | |
| 1069 | /** |
| 1070 | * {@inheritDoc} |
| 1071 | */ |
| 1072 | @Override |
| 1073 | public boolean dispatchTouchEvent(MotionEvent ev) { |
Jeff Brown | 85a3176 | 2010-09-01 17:01:00 -0700 | [diff] [blame] | 1074 | if (!onFilterTouchEventForSecurity(ev)) { |
| 1075 | return false; |
| 1076 | } |
| 1077 | |
Jeff Brown | 20e987b | 2010-08-23 12:01:02 -0700 | [diff] [blame] | 1078 | final int action = ev.getAction(); |
| 1079 | final int actionMasked = action & MotionEvent.ACTION_MASK; |
| 1080 | |
| 1081 | // Handle an initial down. |
| 1082 | if (actionMasked == MotionEvent.ACTION_DOWN) { |
| 1083 | // Throw away all previous state when starting a new touch gesture. |
| 1084 | // The framework may have dropped the up or cancel event for the previous gesture |
| 1085 | // due to an app switch, ANR, or some other state change. |
| 1086 | cancelAndClearTouchTargets(ev); |
| 1087 | resetTouchState(); |
Adam Powell | 167bc82 | 2010-09-13 18:11:08 -0700 | [diff] [blame] | 1088 | } |
Adam Powell | 2b342f0 | 2010-08-18 18:14:13 -0700 | [diff] [blame] | 1089 | |
Jeff Brown | 20e987b | 2010-08-23 12:01:02 -0700 | [diff] [blame] | 1090 | // Check for interception. |
| 1091 | final boolean intercepted; |
| 1092 | if (actionMasked == MotionEvent.ACTION_DOWN || mFirstTouchTarget != null) { |
| 1093 | final boolean disallowIntercept = (mGroupFlags & FLAG_DISALLOW_INTERCEPT) != 0; |
| 1094 | if (!disallowIntercept) { |
| 1095 | intercepted = onInterceptTouchEvent(ev); |
| 1096 | ev.setAction(action); // restore action in case onInterceptTouchEvent() changed it |
| 1097 | } else { |
| 1098 | intercepted = false; |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 1099 | } |
Jeff Brown | 20e987b | 2010-08-23 12:01:02 -0700 | [diff] [blame] | 1100 | } else { |
| 1101 | intercepted = true; |
| 1102 | } |
Adam Powell | b08013c | 2010-09-16 16:28:11 -0700 | [diff] [blame] | 1103 | |
Jeff Brown | 20e987b | 2010-08-23 12:01:02 -0700 | [diff] [blame] | 1104 | // Check for cancelation. |
| 1105 | final boolean canceled = resetCancelNextUpFlag(this) |
| 1106 | || actionMasked == MotionEvent.ACTION_CANCEL; |
| 1107 | |
| 1108 | // Update list of touch targets for pointer down, if needed. |
| 1109 | final boolean split = (mGroupFlags & FLAG_SPLIT_MOTION_EVENTS) != 0; |
| 1110 | TouchTarget newTouchTarget = null; |
| 1111 | boolean alreadyDispatchedToNewTouchTarget = false; |
| 1112 | if (!canceled && !intercepted) { |
| 1113 | if (actionMasked == MotionEvent.ACTION_DOWN |
| 1114 | || (split && actionMasked == MotionEvent.ACTION_POINTER_DOWN)) { |
| 1115 | final int actionIndex = ev.getActionIndex(); // always 0 for down |
| 1116 | final int idBitsToAssign = split ? 1 << ev.getPointerId(actionIndex) |
| 1117 | : TouchTarget.ALL_POINTER_IDS; |
| 1118 | |
| 1119 | // Clean up earlier touch targets for this pointer id in case they |
| 1120 | // have become out of sync. |
| 1121 | removePointersFromTouchTargets(idBitsToAssign); |
| 1122 | |
| 1123 | final int childrenCount = mChildrenCount; |
| 1124 | if (childrenCount != 0) { |
| 1125 | // Find a child that can receive the event. Scan children from front to back. |
| 1126 | final View[] children = mChildren; |
| 1127 | final float x = ev.getX(actionIndex); |
| 1128 | final float y = ev.getY(actionIndex); |
| 1129 | |
| 1130 | for (int i = childrenCount - 1; i >= 0; i--) { |
| 1131 | final View child = children[i]; |
| 1132 | if ((child.mViewFlags & VISIBILITY_MASK) != VISIBLE |
| 1133 | && child.getAnimation() == null) { |
| 1134 | // Skip invisible child unless it is animating. |
| 1135 | continue; |
| 1136 | } |
| 1137 | |
Christopher Tate | 2c095f3 | 2010-10-04 14:13:40 -0700 | [diff] [blame] | 1138 | if (!isTransformedTouchPointInView(x, y, child, null)) { |
Jeff Brown | 20e987b | 2010-08-23 12:01:02 -0700 | [diff] [blame] | 1139 | // New pointer is out of child's bounds. |
| 1140 | continue; |
| 1141 | } |
| 1142 | |
| 1143 | newTouchTarget = getTouchTarget(child); |
| 1144 | if (newTouchTarget != null) { |
| 1145 | // Child is already receiving touch within its bounds. |
| 1146 | // Give it the new pointer in addition to the ones it is handling. |
| 1147 | newTouchTarget.pointerIdBits |= idBitsToAssign; |
| 1148 | break; |
| 1149 | } |
| 1150 | |
| 1151 | resetCancelNextUpFlag(child); |
| 1152 | if (dispatchTransformedTouchEvent(ev, false, child, idBitsToAssign)) { |
| 1153 | // Child wants to receive touch within its bounds. |
| 1154 | newTouchTarget = addTouchTarget(child, idBitsToAssign); |
| 1155 | alreadyDispatchedToNewTouchTarget = true; |
| 1156 | break; |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 1157 | } |
| 1158 | } |
| 1159 | } |
Jeff Brown | 20e987b | 2010-08-23 12:01:02 -0700 | [diff] [blame] | 1160 | |
| 1161 | if (newTouchTarget == null && mFirstTouchTarget != null) { |
| 1162 | // Did not find a child to receive the event. |
| 1163 | // Assign the pointer to the least recently added target. |
| 1164 | newTouchTarget = mFirstTouchTarget; |
| 1165 | while (newTouchTarget.next != null) { |
| 1166 | newTouchTarget = newTouchTarget.next; |
| 1167 | } |
| 1168 | newTouchTarget.pointerIdBits |= idBitsToAssign; |
| 1169 | } |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 1170 | } |
| 1171 | } |
Romain Guy | 8506ab4 | 2009-06-11 17:35:47 -0700 | [diff] [blame] | 1172 | |
Jeff Brown | 20e987b | 2010-08-23 12:01:02 -0700 | [diff] [blame] | 1173 | // Dispatch to touch targets. |
| 1174 | boolean handled = false; |
| 1175 | if (mFirstTouchTarget == null) { |
| 1176 | // No touch targets so treat this as an ordinary view. |
| 1177 | handled = dispatchTransformedTouchEvent(ev, canceled, null, |
| 1178 | TouchTarget.ALL_POINTER_IDS); |
Adam Cohen | 9b07394 | 2010-08-19 16:49:52 -0700 | [diff] [blame] | 1179 | } else { |
Jeff Brown | 20e987b | 2010-08-23 12:01:02 -0700 | [diff] [blame] | 1180 | // Dispatch to touch targets, excluding the new touch target if we already |
| 1181 | // dispatched to it. Cancel touch targets if necessary. |
| 1182 | TouchTarget predecessor = null; |
| 1183 | TouchTarget target = mFirstTouchTarget; |
| 1184 | while (target != null) { |
| 1185 | final TouchTarget next = target.next; |
| 1186 | if (alreadyDispatchedToNewTouchTarget && target == newTouchTarget) { |
| 1187 | handled = true; |
| 1188 | } else { |
| 1189 | final boolean cancelChild = resetCancelNextUpFlag(target.child) || intercepted; |
| 1190 | if (dispatchTransformedTouchEvent(ev, cancelChild, |
| 1191 | target.child, target.pointerIdBits)) { |
| 1192 | handled = true; |
| 1193 | } |
| 1194 | if (cancelChild) { |
| 1195 | if (predecessor == null) { |
| 1196 | mFirstTouchTarget = next; |
| 1197 | } else { |
| 1198 | predecessor.next = next; |
| 1199 | } |
| 1200 | target.recycle(); |
| 1201 | target = next; |
| 1202 | continue; |
| 1203 | } |
| 1204 | } |
| 1205 | predecessor = target; |
| 1206 | target = next; |
| 1207 | } |
| 1208 | } |
| 1209 | |
| 1210 | // Update list of touch targets for pointer up or cancel, if needed. |
| 1211 | if (canceled || actionMasked == MotionEvent.ACTION_UP) { |
| 1212 | resetTouchState(); |
| 1213 | } else if (split && actionMasked == MotionEvent.ACTION_POINTER_UP) { |
| 1214 | final int actionIndex = ev.getActionIndex(); |
| 1215 | final int idBitsToRemove = 1 << ev.getPointerId(actionIndex); |
| 1216 | removePointersFromTouchTargets(idBitsToRemove); |
| 1217 | } |
| 1218 | |
| 1219 | return handled; |
| 1220 | } |
| 1221 | |
Romain Guy | 469b1db | 2010-10-05 11:49:57 -0700 | [diff] [blame] | 1222 | /** |
| 1223 | * Resets all touch state in preparation for a new cycle. |
| 1224 | */ |
| 1225 | private void resetTouchState() { |
Jeff Brown | 20e987b | 2010-08-23 12:01:02 -0700 | [diff] [blame] | 1226 | clearTouchTargets(); |
| 1227 | resetCancelNextUpFlag(this); |
| 1228 | mGroupFlags &= ~FLAG_DISALLOW_INTERCEPT; |
| 1229 | } |
| 1230 | |
Romain Guy | 469b1db | 2010-10-05 11:49:57 -0700 | [diff] [blame] | 1231 | /** |
| 1232 | * Resets the cancel next up flag. |
| 1233 | * Returns true if the flag was previously set. |
| 1234 | */ |
| 1235 | private boolean resetCancelNextUpFlag(View view) { |
Jeff Brown | 20e987b | 2010-08-23 12:01:02 -0700 | [diff] [blame] | 1236 | if ((view.mPrivateFlags & CANCEL_NEXT_UP_EVENT) != 0) { |
| 1237 | view.mPrivateFlags &= ~CANCEL_NEXT_UP_EVENT; |
| 1238 | return true; |
Adam Cohen | 9b07394 | 2010-08-19 16:49:52 -0700 | [diff] [blame] | 1239 | } |
| 1240 | return false; |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 1241 | } |
| 1242 | |
Romain Guy | 469b1db | 2010-10-05 11:49:57 -0700 | [diff] [blame] | 1243 | /** |
| 1244 | * Clears all touch targets. |
| 1245 | */ |
| 1246 | private void clearTouchTargets() { |
Jeff Brown | 20e987b | 2010-08-23 12:01:02 -0700 | [diff] [blame] | 1247 | TouchTarget target = mFirstTouchTarget; |
| 1248 | if (target != null) { |
| 1249 | do { |
| 1250 | TouchTarget next = target.next; |
| 1251 | target.recycle(); |
| 1252 | target = next; |
| 1253 | } while (target != null); |
| 1254 | mFirstTouchTarget = null; |
| 1255 | } |
| 1256 | } |
| 1257 | |
Romain Guy | 469b1db | 2010-10-05 11:49:57 -0700 | [diff] [blame] | 1258 | /** |
| 1259 | * Cancels and clears all touch targets. |
| 1260 | */ |
| 1261 | private void cancelAndClearTouchTargets(MotionEvent event) { |
Jeff Brown | 20e987b | 2010-08-23 12:01:02 -0700 | [diff] [blame] | 1262 | if (mFirstTouchTarget != null) { |
| 1263 | boolean syntheticEvent = false; |
| 1264 | if (event == null) { |
| 1265 | final long now = SystemClock.uptimeMillis(); |
| 1266 | event = MotionEvent.obtain(now, now, |
| 1267 | MotionEvent.ACTION_CANCEL, 0.0f, 0.0f, 0); |
| 1268 | syntheticEvent = true; |
| 1269 | } |
| 1270 | |
| 1271 | for (TouchTarget target = mFirstTouchTarget; target != null; target = target.next) { |
| 1272 | resetCancelNextUpFlag(target.child); |
| 1273 | dispatchTransformedTouchEvent(event, true, target.child, target.pointerIdBits); |
| 1274 | } |
| 1275 | clearTouchTargets(); |
| 1276 | |
| 1277 | if (syntheticEvent) { |
| 1278 | event.recycle(); |
| 1279 | } |
| 1280 | } |
| 1281 | } |
| 1282 | |
Romain Guy | 469b1db | 2010-10-05 11:49:57 -0700 | [diff] [blame] | 1283 | /** |
| 1284 | * Gets the touch target for specified child view. |
| 1285 | * Returns null if not found. |
| 1286 | */ |
| 1287 | private TouchTarget getTouchTarget(View child) { |
Jeff Brown | 20e987b | 2010-08-23 12:01:02 -0700 | [diff] [blame] | 1288 | for (TouchTarget target = mFirstTouchTarget; target != null; target = target.next) { |
| 1289 | if (target.child == child) { |
| 1290 | return target; |
| 1291 | } |
| 1292 | } |
| 1293 | return null; |
| 1294 | } |
| 1295 | |
Romain Guy | 469b1db | 2010-10-05 11:49:57 -0700 | [diff] [blame] | 1296 | /** |
| 1297 | * Adds a touch target for specified child to the beginning of the list. |
| 1298 | * Assumes the target child is not already present. |
| 1299 | */ |
| 1300 | private TouchTarget addTouchTarget(View child, int pointerIdBits) { |
Jeff Brown | 20e987b | 2010-08-23 12:01:02 -0700 | [diff] [blame] | 1301 | TouchTarget target = TouchTarget.obtain(child, pointerIdBits); |
| 1302 | target.next = mFirstTouchTarget; |
| 1303 | mFirstTouchTarget = target; |
| 1304 | return target; |
| 1305 | } |
| 1306 | |
Romain Guy | 469b1db | 2010-10-05 11:49:57 -0700 | [diff] [blame] | 1307 | /** |
| 1308 | * Removes the pointer ids from consideration. |
| 1309 | */ |
| 1310 | private void removePointersFromTouchTargets(int pointerIdBits) { |
Jeff Brown | 20e987b | 2010-08-23 12:01:02 -0700 | [diff] [blame] | 1311 | TouchTarget predecessor = null; |
| 1312 | TouchTarget target = mFirstTouchTarget; |
| 1313 | while (target != null) { |
| 1314 | final TouchTarget next = target.next; |
| 1315 | if ((target.pointerIdBits & pointerIdBits) != 0) { |
| 1316 | target.pointerIdBits &= ~pointerIdBits; |
| 1317 | if (target.pointerIdBits == 0) { |
| 1318 | if (predecessor == null) { |
| 1319 | mFirstTouchTarget = next; |
| 1320 | } else { |
| 1321 | predecessor.next = next; |
| 1322 | } |
| 1323 | target.recycle(); |
| 1324 | target = next; |
| 1325 | continue; |
| 1326 | } |
| 1327 | } |
| 1328 | predecessor = target; |
| 1329 | target = next; |
| 1330 | } |
| 1331 | } |
| 1332 | |
Romain Guy | 469b1db | 2010-10-05 11:49:57 -0700 | [diff] [blame] | 1333 | /** |
| 1334 | * Returns true if a child view contains the specified point when transformed |
Jeff Brown | 20e987b | 2010-08-23 12:01:02 -0700 | [diff] [blame] | 1335 | * into its coordinate space. |
Romain Guy | 469b1db | 2010-10-05 11:49:57 -0700 | [diff] [blame] | 1336 | * Child must not be null. |
Adam Cohen | a32edd4 | 2010-10-26 10:35:01 -0700 | [diff] [blame] | 1337 | * @hide |
Romain Guy | 469b1db | 2010-10-05 11:49:57 -0700 | [diff] [blame] | 1338 | */ |
Adam Cohen | a32edd4 | 2010-10-26 10:35:01 -0700 | [diff] [blame] | 1339 | protected boolean isTransformedTouchPointInView(float x, float y, View child, |
Christopher Tate | 2c095f3 | 2010-10-04 14:13:40 -0700 | [diff] [blame] | 1340 | PointF outLocalPoint) { |
Jeff Brown | 20e987b | 2010-08-23 12:01:02 -0700 | [diff] [blame] | 1341 | float localX = x + mScrollX - child.mLeft; |
| 1342 | float localY = y + mScrollY - child.mTop; |
| 1343 | if (! child.hasIdentityMatrix() && mAttachInfo != null) { |
Adam Powell | 2b342f0 | 2010-08-18 18:14:13 -0700 | [diff] [blame] | 1344 | final float[] localXY = mAttachInfo.mTmpTransformLocation; |
| 1345 | localXY[0] = localX; |
| 1346 | localXY[1] = localY; |
| 1347 | child.getInverseMatrix().mapPoints(localXY); |
| 1348 | localX = localXY[0]; |
| 1349 | localY = localXY[1]; |
| 1350 | } |
Christopher Tate | 2c095f3 | 2010-10-04 14:13:40 -0700 | [diff] [blame] | 1351 | final boolean isInView = child.pointInView(localX, localY); |
| 1352 | if (isInView && outLocalPoint != null) { |
| 1353 | outLocalPoint.set(localX, localY); |
| 1354 | } |
| 1355 | return isInView; |
Adam Powell | 2b342f0 | 2010-08-18 18:14:13 -0700 | [diff] [blame] | 1356 | } |
| 1357 | |
Romain Guy | 469b1db | 2010-10-05 11:49:57 -0700 | [diff] [blame] | 1358 | /** |
| 1359 | * Transforms a motion event into the coordinate space of a particular child view, |
Jeff Brown | 20e987b | 2010-08-23 12:01:02 -0700 | [diff] [blame] | 1360 | * filters out irrelevant pointer ids, and overrides its action if necessary. |
Romain Guy | 469b1db | 2010-10-05 11:49:57 -0700 | [diff] [blame] | 1361 | * If child is null, assumes the MotionEvent will be sent to this ViewGroup instead. |
| 1362 | */ |
| 1363 | private boolean dispatchTransformedTouchEvent(MotionEvent event, boolean cancel, |
Jeff Brown | 20e987b | 2010-08-23 12:01:02 -0700 | [diff] [blame] | 1364 | View child, int desiredPointerIdBits) { |
| 1365 | final boolean handled; |
Adam Powell | 2b342f0 | 2010-08-18 18:14:13 -0700 | [diff] [blame] | 1366 | |
Jeff Brown | 20e987b | 2010-08-23 12:01:02 -0700 | [diff] [blame] | 1367 | // Canceling motions is a special case. We don't need to perform any transformations |
| 1368 | // or filtering. The important part is the action, not the contents. |
| 1369 | final int oldAction = event.getAction(); |
| 1370 | if (cancel || oldAction == MotionEvent.ACTION_CANCEL) { |
| 1371 | event.setAction(MotionEvent.ACTION_CANCEL); |
| 1372 | if (child == null) { |
| 1373 | handled = super.dispatchTouchEvent(event); |
| 1374 | } else { |
| 1375 | handled = child.dispatchTouchEvent(event); |
| 1376 | } |
| 1377 | event.setAction(oldAction); |
| 1378 | return handled; |
| 1379 | } |
Adam Powell | 2b342f0 | 2010-08-18 18:14:13 -0700 | [diff] [blame] | 1380 | |
Jeff Brown | 20e987b | 2010-08-23 12:01:02 -0700 | [diff] [blame] | 1381 | // Calculate the number of pointers to deliver. |
| 1382 | final int oldPointerCount = event.getPointerCount(); |
| 1383 | int newPointerCount = 0; |
| 1384 | if (desiredPointerIdBits == TouchTarget.ALL_POINTER_IDS) { |
| 1385 | newPointerCount = oldPointerCount; |
| 1386 | } else { |
| 1387 | for (int i = 0; i < oldPointerCount; i++) { |
| 1388 | final int pointerId = event.getPointerId(i); |
| 1389 | final int pointerIdBit = 1 << pointerId; |
| 1390 | if ((pointerIdBit & desiredPointerIdBits) != 0) { |
| 1391 | newPointerCount += 1; |
| 1392 | } |
| 1393 | } |
| 1394 | } |
Adam Powell | 2b342f0 | 2010-08-18 18:14:13 -0700 | [diff] [blame] | 1395 | |
Jeff Brown | 20e987b | 2010-08-23 12:01:02 -0700 | [diff] [blame] | 1396 | // If for some reason we ended up in an inconsistent state where it looks like we |
| 1397 | // might produce a motion event with no pointers in it, then drop the event. |
| 1398 | if (newPointerCount == 0) { |
| 1399 | return false; |
| 1400 | } |
Adam Powell | 2b342f0 | 2010-08-18 18:14:13 -0700 | [diff] [blame] | 1401 | |
Jeff Brown | 20e987b | 2010-08-23 12:01:02 -0700 | [diff] [blame] | 1402 | // If the number of pointers is the same and we don't need to perform any fancy |
| 1403 | // irreversible transformations, then we can reuse the motion event for this |
| 1404 | // dispatch as long as we are careful to revert any changes we make. |
| 1405 | final boolean reuse = newPointerCount == oldPointerCount |
| 1406 | && (child == null || child.hasIdentityMatrix()); |
| 1407 | if (reuse) { |
| 1408 | if (child == null) { |
| 1409 | handled = super.dispatchTouchEvent(event); |
| 1410 | } else { |
| 1411 | final float offsetX = mScrollX - child.mLeft; |
| 1412 | final float offsetY = mScrollY - child.mTop; |
| 1413 | event.offsetLocation(offsetX, offsetY); |
Adam Powell | 2b342f0 | 2010-08-18 18:14:13 -0700 | [diff] [blame] | 1414 | |
Jeff Brown | 20e987b | 2010-08-23 12:01:02 -0700 | [diff] [blame] | 1415 | handled = child.dispatchTouchEvent(event); |
| 1416 | |
| 1417 | event.offsetLocation(-offsetX, -offsetY); |
| 1418 | } |
| 1419 | return handled; |
| 1420 | } |
| 1421 | |
| 1422 | // Make a copy of the event. |
| 1423 | // If the number of pointers is different, then we need to filter out irrelevant pointers |
| 1424 | // as we make a copy of the motion event. |
| 1425 | MotionEvent transformedEvent; |
| 1426 | if (newPointerCount == oldPointerCount) { |
| 1427 | transformedEvent = MotionEvent.obtain(event); |
| 1428 | } else { |
| 1429 | growTmpPointerArrays(newPointerCount); |
| 1430 | final int[] newPointerIndexMap = mTmpPointerIndexMap; |
| 1431 | final int[] newPointerIds = mTmpPointerIds; |
| 1432 | final MotionEvent.PointerCoords[] newPointerCoords = mTmpPointerCoords; |
| 1433 | |
| 1434 | int newPointerIndex = 0; |
| 1435 | int oldPointerIndex = 0; |
| 1436 | while (newPointerIndex < newPointerCount) { |
| 1437 | final int pointerId = event.getPointerId(oldPointerIndex); |
| 1438 | final int pointerIdBits = 1 << pointerId; |
| 1439 | if ((pointerIdBits & desiredPointerIdBits) != 0) { |
| 1440 | newPointerIndexMap[newPointerIndex] = oldPointerIndex; |
| 1441 | newPointerIds[newPointerIndex] = pointerId; |
| 1442 | if (newPointerCoords[newPointerIndex] == null) { |
| 1443 | newPointerCoords[newPointerIndex] = new MotionEvent.PointerCoords(); |
| 1444 | } |
| 1445 | |
| 1446 | newPointerIndex += 1; |
| 1447 | } |
| 1448 | oldPointerIndex += 1; |
| 1449 | } |
| 1450 | |
| 1451 | final int newAction; |
| 1452 | if (cancel) { |
| 1453 | newAction = MotionEvent.ACTION_CANCEL; |
| 1454 | } else { |
| 1455 | final int oldMaskedAction = oldAction & MotionEvent.ACTION_MASK; |
| 1456 | if (oldMaskedAction == MotionEvent.ACTION_POINTER_DOWN |
| 1457 | || oldMaskedAction == MotionEvent.ACTION_POINTER_UP) { |
| 1458 | final int changedPointerId = event.getPointerId( |
| 1459 | (oldAction & MotionEvent.ACTION_POINTER_INDEX_MASK) |
| 1460 | >> MotionEvent.ACTION_POINTER_INDEX_SHIFT); |
| 1461 | final int changedPointerIdBits = 1 << changedPointerId; |
| 1462 | if ((changedPointerIdBits & desiredPointerIdBits) != 0) { |
| 1463 | if (newPointerCount == 1) { |
| 1464 | // The first/last pointer went down/up. |
| 1465 | newAction = oldMaskedAction == MotionEvent.ACTION_POINTER_DOWN |
| 1466 | ? MotionEvent.ACTION_DOWN : MotionEvent.ACTION_UP; |
| 1467 | } else { |
| 1468 | // A secondary pointer went down/up. |
| 1469 | int newChangedPointerIndex = 0; |
| 1470 | while (newPointerIds[newChangedPointerIndex] != changedPointerId) { |
| 1471 | newChangedPointerIndex += 1; |
Adam Powell | 2b342f0 | 2010-08-18 18:14:13 -0700 | [diff] [blame] | 1472 | } |
Jeff Brown | 20e987b | 2010-08-23 12:01:02 -0700 | [diff] [blame] | 1473 | newAction = oldMaskedAction | (newChangedPointerIndex |
| 1474 | << MotionEvent.ACTION_POINTER_INDEX_SHIFT); |
Adam Powell | 2b342f0 | 2010-08-18 18:14:13 -0700 | [diff] [blame] | 1475 | } |
Jeff Brown | 20e987b | 2010-08-23 12:01:02 -0700 | [diff] [blame] | 1476 | } else { |
| 1477 | // An unrelated pointer changed. |
| 1478 | newAction = MotionEvent.ACTION_MOVE; |
| 1479 | } |
| 1480 | } else { |
| 1481 | // Simple up/down/cancel/move motion action. |
| 1482 | newAction = oldMaskedAction; |
| 1483 | } |
| 1484 | } |
| 1485 | |
| 1486 | transformedEvent = null; |
| 1487 | final int historySize = event.getHistorySize(); |
| 1488 | for (int historyIndex = 0; historyIndex <= historySize; historyIndex++) { |
| 1489 | for (newPointerIndex = 0; newPointerIndex < newPointerCount; newPointerIndex++) { |
| 1490 | final MotionEvent.PointerCoords c = newPointerCoords[newPointerIndex]; |
| 1491 | oldPointerIndex = newPointerIndexMap[newPointerIndex]; |
| 1492 | if (historyIndex != historySize) { |
| 1493 | event.getHistoricalPointerCoords(oldPointerIndex, historyIndex, c); |
| 1494 | } else { |
| 1495 | event.getPointerCoords(oldPointerIndex, c); |
Adam Powell | 2b342f0 | 2010-08-18 18:14:13 -0700 | [diff] [blame] | 1496 | } |
| 1497 | } |
| 1498 | |
Jeff Brown | 20e987b | 2010-08-23 12:01:02 -0700 | [diff] [blame] | 1499 | final long eventTime; |
| 1500 | if (historyIndex != historySize) { |
| 1501 | eventTime = event.getHistoricalEventTime(historyIndex); |
| 1502 | } else { |
| 1503 | eventTime = event.getEventTime(); |
| 1504 | } |
| 1505 | |
| 1506 | if (transformedEvent == null) { |
| 1507 | transformedEvent = MotionEvent.obtain( |
| 1508 | event.getDownTime(), eventTime, newAction, |
| 1509 | newPointerCount, newPointerIds, newPointerCoords, |
| 1510 | event.getMetaState(), event.getXPrecision(), event.getYPrecision(), |
| 1511 | event.getDeviceId(), event.getEdgeFlags(), event.getSource(), |
| 1512 | event.getFlags()); |
| 1513 | } else { |
| 1514 | transformedEvent.addBatch(eventTime, newPointerCoords, 0); |
Adam Powell | 2b342f0 | 2010-08-18 18:14:13 -0700 | [diff] [blame] | 1515 | } |
| 1516 | } |
| 1517 | } |
| 1518 | |
Jeff Brown | 20e987b | 2010-08-23 12:01:02 -0700 | [diff] [blame] | 1519 | // Perform any necessary transformations and dispatch. |
| 1520 | if (child == null) { |
| 1521 | handled = super.dispatchTouchEvent(transformedEvent); |
| 1522 | } else { |
| 1523 | final float offsetX = mScrollX - child.mLeft; |
| 1524 | final float offsetY = mScrollY - child.mTop; |
| 1525 | transformedEvent.offsetLocation(offsetX, offsetY); |
| 1526 | if (! child.hasIdentityMatrix()) { |
| 1527 | transformedEvent.transform(child.getInverseMatrix()); |
Adam Powell | 2b342f0 | 2010-08-18 18:14:13 -0700 | [diff] [blame] | 1528 | } |
| 1529 | |
Jeff Brown | 20e987b | 2010-08-23 12:01:02 -0700 | [diff] [blame] | 1530 | handled = child.dispatchTouchEvent(transformedEvent); |
Adam Powell | 2b342f0 | 2010-08-18 18:14:13 -0700 | [diff] [blame] | 1531 | } |
| 1532 | |
Jeff Brown | 20e987b | 2010-08-23 12:01:02 -0700 | [diff] [blame] | 1533 | // Done. |
| 1534 | transformedEvent.recycle(); |
Adam Powell | 2b342f0 | 2010-08-18 18:14:13 -0700 | [diff] [blame] | 1535 | return handled; |
| 1536 | } |
| 1537 | |
Romain Guy | 469b1db | 2010-10-05 11:49:57 -0700 | [diff] [blame] | 1538 | /** |
| 1539 | * Enlarge the temporary pointer arrays for splitting pointers. |
| 1540 | * May discard contents (but keeps PointerCoords objects to avoid reallocating them). |
| 1541 | */ |
| 1542 | private void growTmpPointerArrays(int desiredCapacity) { |
Jeff Brown | 20e987b | 2010-08-23 12:01:02 -0700 | [diff] [blame] | 1543 | final MotionEvent.PointerCoords[] oldTmpPointerCoords = mTmpPointerCoords; |
| 1544 | int capacity; |
| 1545 | if (oldTmpPointerCoords != null) { |
| 1546 | capacity = oldTmpPointerCoords.length; |
| 1547 | if (desiredCapacity <= capacity) { |
| 1548 | return; |
| 1549 | } |
| 1550 | } else { |
| 1551 | capacity = 4; |
| 1552 | } |
| 1553 | |
| 1554 | while (capacity < desiredCapacity) { |
| 1555 | capacity *= 2; |
| 1556 | } |
| 1557 | |
| 1558 | mTmpPointerIndexMap = new int[capacity]; |
| 1559 | mTmpPointerIds = new int[capacity]; |
| 1560 | mTmpPointerCoords = new MotionEvent.PointerCoords[capacity]; |
| 1561 | |
| 1562 | if (oldTmpPointerCoords != null) { |
| 1563 | System.arraycopy(oldTmpPointerCoords, 0, mTmpPointerCoords, 0, |
| 1564 | oldTmpPointerCoords.length); |
| 1565 | } |
| 1566 | } |
| 1567 | |
Adam Powell | 2b342f0 | 2010-08-18 18:14:13 -0700 | [diff] [blame] | 1568 | /** |
| 1569 | * Enable or disable the splitting of MotionEvents to multiple children during touch event |
| 1570 | * dispatch. This behavior is disabled by default. |
| 1571 | * |
| 1572 | * <p>When this option is enabled MotionEvents may be split and dispatched to different child |
| 1573 | * views depending on where each pointer initially went down. This allows for user interactions |
| 1574 | * such as scrolling two panes of content independently, chording of buttons, and performing |
| 1575 | * independent gestures on different pieces of content. |
| 1576 | * |
| 1577 | * @param split <code>true</code> to allow MotionEvents to be split and dispatched to multiple |
| 1578 | * child views. <code>false</code> to only allow one child view to be the target of |
| 1579 | * any MotionEvent received by this ViewGroup. |
| 1580 | */ |
| 1581 | public void setMotionEventSplittingEnabled(boolean split) { |
| 1582 | // TODO Applications really shouldn't change this setting mid-touch event, |
| 1583 | // but perhaps this should handle that case and send ACTION_CANCELs to any child views |
| 1584 | // with gestures in progress when this is changed. |
| 1585 | if (split) { |
Adam Powell | 2b342f0 | 2010-08-18 18:14:13 -0700 | [diff] [blame] | 1586 | mGroupFlags |= FLAG_SPLIT_MOTION_EVENTS; |
| 1587 | } else { |
| 1588 | mGroupFlags &= ~FLAG_SPLIT_MOTION_EVENTS; |
Adam Powell | 2b342f0 | 2010-08-18 18:14:13 -0700 | [diff] [blame] | 1589 | } |
| 1590 | } |
| 1591 | |
| 1592 | /** |
| 1593 | * @return true if MotionEvents dispatched to this ViewGroup can be split to multiple children. |
| 1594 | */ |
| 1595 | public boolean isMotionEventSplittingEnabled() { |
| 1596 | return (mGroupFlags & FLAG_SPLIT_MOTION_EVENTS) == FLAG_SPLIT_MOTION_EVENTS; |
| 1597 | } |
| 1598 | |
| 1599 | /** |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 1600 | * {@inheritDoc} |
| 1601 | */ |
| 1602 | public void requestDisallowInterceptTouchEvent(boolean disallowIntercept) { |
Romain Guy | 8506ab4 | 2009-06-11 17:35:47 -0700 | [diff] [blame] | 1603 | |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 1604 | if (disallowIntercept == ((mGroupFlags & FLAG_DISALLOW_INTERCEPT) != 0)) { |
| 1605 | // We're already in this state, assume our ancestors are too |
| 1606 | return; |
| 1607 | } |
Romain Guy | 8506ab4 | 2009-06-11 17:35:47 -0700 | [diff] [blame] | 1608 | |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 1609 | if (disallowIntercept) { |
| 1610 | mGroupFlags |= FLAG_DISALLOW_INTERCEPT; |
| 1611 | } else { |
| 1612 | mGroupFlags &= ~FLAG_DISALLOW_INTERCEPT; |
| 1613 | } |
Romain Guy | 8506ab4 | 2009-06-11 17:35:47 -0700 | [diff] [blame] | 1614 | |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 1615 | // Pass it up to our parent |
| 1616 | if (mParent != null) { |
| 1617 | mParent.requestDisallowInterceptTouchEvent(disallowIntercept); |
| 1618 | } |
| 1619 | } |
| 1620 | |
| 1621 | /** |
| 1622 | * Implement this method to intercept all touch screen motion events. This |
| 1623 | * allows you to watch events as they are dispatched to your children, and |
| 1624 | * take ownership of the current gesture at any point. |
| 1625 | * |
| 1626 | * <p>Using this function takes some care, as it has a fairly complicated |
| 1627 | * interaction with {@link View#onTouchEvent(MotionEvent) |
| 1628 | * View.onTouchEvent(MotionEvent)}, and using it requires implementing |
| 1629 | * that method as well as this one in the correct way. Events will be |
| 1630 | * received in the following order: |
| 1631 | * |
| 1632 | * <ol> |
| 1633 | * <li> You will receive the down event here. |
| 1634 | * <li> The down event will be handled either by a child of this view |
| 1635 | * group, or given to your own onTouchEvent() method to handle; this means |
| 1636 | * you should implement onTouchEvent() to return true, so you will |
| 1637 | * continue to see the rest of the gesture (instead of looking for |
| 1638 | * a parent view to handle it). Also, by returning true from |
| 1639 | * onTouchEvent(), you will not receive any following |
| 1640 | * events in onInterceptTouchEvent() and all touch processing must |
| 1641 | * happen in onTouchEvent() like normal. |
| 1642 | * <li> For as long as you return false from this function, each following |
| 1643 | * event (up to and including the final up) will be delivered first here |
| 1644 | * and then to the target's onTouchEvent(). |
| 1645 | * <li> If you return true from here, you will not receive any |
| 1646 | * following events: the target view will receive the same event but |
| 1647 | * with the action {@link MotionEvent#ACTION_CANCEL}, and all further |
| 1648 | * events will be delivered to your onTouchEvent() method and no longer |
| 1649 | * appear here. |
| 1650 | * </ol> |
| 1651 | * |
| 1652 | * @param ev The motion event being dispatched down the hierarchy. |
| 1653 | * @return Return true to steal motion events from the children and have |
| 1654 | * them dispatched to this ViewGroup through onTouchEvent(). |
| 1655 | * The current target will receive an ACTION_CANCEL event, and no further |
| 1656 | * messages will be delivered here. |
| 1657 | */ |
| 1658 | public boolean onInterceptTouchEvent(MotionEvent ev) { |
| 1659 | return false; |
| 1660 | } |
| 1661 | |
| 1662 | /** |
| 1663 | * {@inheritDoc} |
| 1664 | * |
| 1665 | * Looks for a view to give focus to respecting the setting specified by |
| 1666 | * {@link #getDescendantFocusability()}. |
| 1667 | * |
| 1668 | * Uses {@link #onRequestFocusInDescendants(int, android.graphics.Rect)} to |
| 1669 | * find focus within the children of this group when appropriate. |
| 1670 | * |
| 1671 | * @see #FOCUS_BEFORE_DESCENDANTS |
| 1672 | * @see #FOCUS_AFTER_DESCENDANTS |
| 1673 | * @see #FOCUS_BLOCK_DESCENDANTS |
| 1674 | * @see #onRequestFocusInDescendants |
| 1675 | */ |
| 1676 | @Override |
| 1677 | public boolean requestFocus(int direction, Rect previouslyFocusedRect) { |
| 1678 | if (DBG) { |
| 1679 | System.out.println(this + " ViewGroup.requestFocus direction=" |
| 1680 | + direction); |
| 1681 | } |
| 1682 | int descendantFocusability = getDescendantFocusability(); |
| 1683 | |
| 1684 | switch (descendantFocusability) { |
| 1685 | case FOCUS_BLOCK_DESCENDANTS: |
| 1686 | return super.requestFocus(direction, previouslyFocusedRect); |
| 1687 | case FOCUS_BEFORE_DESCENDANTS: { |
| 1688 | final boolean took = super.requestFocus(direction, previouslyFocusedRect); |
| 1689 | return took ? took : onRequestFocusInDescendants(direction, previouslyFocusedRect); |
| 1690 | } |
| 1691 | case FOCUS_AFTER_DESCENDANTS: { |
| 1692 | final boolean took = onRequestFocusInDescendants(direction, previouslyFocusedRect); |
| 1693 | return took ? took : super.requestFocus(direction, previouslyFocusedRect); |
| 1694 | } |
| 1695 | default: |
| 1696 | throw new IllegalStateException("descendant focusability must be " |
| 1697 | + "one of FOCUS_BEFORE_DESCENDANTS, FOCUS_AFTER_DESCENDANTS, FOCUS_BLOCK_DESCENDANTS " |
| 1698 | + "but is " + descendantFocusability); |
| 1699 | } |
| 1700 | } |
| 1701 | |
| 1702 | /** |
| 1703 | * Look for a descendant to call {@link View#requestFocus} on. |
| 1704 | * Called by {@link ViewGroup#requestFocus(int, android.graphics.Rect)} |
| 1705 | * when it wants to request focus within its children. Override this to |
| 1706 | * customize how your {@link ViewGroup} requests focus within its children. |
| 1707 | * @param direction One of FOCUS_UP, FOCUS_DOWN, FOCUS_LEFT, and FOCUS_RIGHT |
| 1708 | * @param previouslyFocusedRect The rectangle (in this View's coordinate system) |
| 1709 | * to give a finer grained hint about where focus is coming from. May be null |
| 1710 | * if there is no hint. |
| 1711 | * @return Whether focus was taken. |
| 1712 | */ |
| 1713 | @SuppressWarnings({"ConstantConditions"}) |
| 1714 | protected boolean onRequestFocusInDescendants(int direction, |
| 1715 | Rect previouslyFocusedRect) { |
| 1716 | int index; |
| 1717 | int increment; |
| 1718 | int end; |
| 1719 | int count = mChildrenCount; |
| 1720 | if ((direction & FOCUS_FORWARD) != 0) { |
| 1721 | index = 0; |
| 1722 | increment = 1; |
| 1723 | end = count; |
| 1724 | } else { |
| 1725 | index = count - 1; |
| 1726 | increment = -1; |
| 1727 | end = -1; |
| 1728 | } |
| 1729 | final View[] children = mChildren; |
| 1730 | for (int i = index; i != end; i += increment) { |
| 1731 | View child = children[i]; |
| 1732 | if ((child.mViewFlags & VISIBILITY_MASK) == VISIBLE) { |
| 1733 | if (child.requestFocus(direction, previouslyFocusedRect)) { |
| 1734 | return true; |
| 1735 | } |
| 1736 | } |
| 1737 | } |
| 1738 | return false; |
| 1739 | } |
Chet Haase | 5c13d89 | 2010-10-08 08:37:55 -0700 | [diff] [blame] | 1740 | |
Romain Guy | a440b00 | 2010-02-24 15:57:54 -0800 | [diff] [blame] | 1741 | /** |
| 1742 | * {@inheritDoc} |
Chet Haase | 5c13d89 | 2010-10-08 08:37:55 -0700 | [diff] [blame] | 1743 | * |
Romain Guy | dcc490f | 2010-02-24 17:59:35 -0800 | [diff] [blame] | 1744 | * @hide |
Romain Guy | a440b00 | 2010-02-24 15:57:54 -0800 | [diff] [blame] | 1745 | */ |
| 1746 | @Override |
| 1747 | public void dispatchStartTemporaryDetach() { |
| 1748 | super.dispatchStartTemporaryDetach(); |
| 1749 | final int count = mChildrenCount; |
| 1750 | final View[] children = mChildren; |
| 1751 | for (int i = 0; i < count; i++) { |
| 1752 | children[i].dispatchStartTemporaryDetach(); |
| 1753 | } |
| 1754 | } |
Chet Haase | 5c13d89 | 2010-10-08 08:37:55 -0700 | [diff] [blame] | 1755 | |
Romain Guy | a440b00 | 2010-02-24 15:57:54 -0800 | [diff] [blame] | 1756 | /** |
| 1757 | * {@inheritDoc} |
Chet Haase | 5c13d89 | 2010-10-08 08:37:55 -0700 | [diff] [blame] | 1758 | * |
Romain Guy | dcc490f | 2010-02-24 17:59:35 -0800 | [diff] [blame] | 1759 | * @hide |
Romain Guy | a440b00 | 2010-02-24 15:57:54 -0800 | [diff] [blame] | 1760 | */ |
| 1761 | @Override |
| 1762 | public void dispatchFinishTemporaryDetach() { |
| 1763 | super.dispatchFinishTemporaryDetach(); |
| 1764 | final int count = mChildrenCount; |
| 1765 | final View[] children = mChildren; |
| 1766 | for (int i = 0; i < count; i++) { |
| 1767 | children[i].dispatchFinishTemporaryDetach(); |
| 1768 | } |
| 1769 | } |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 1770 | |
| 1771 | /** |
| 1772 | * {@inheritDoc} |
| 1773 | */ |
| 1774 | @Override |
| 1775 | void dispatchAttachedToWindow(AttachInfo info, int visibility) { |
| 1776 | super.dispatchAttachedToWindow(info, visibility); |
| 1777 | visibility |= mViewFlags & VISIBILITY_MASK; |
| 1778 | final int count = mChildrenCount; |
| 1779 | final View[] children = mChildren; |
| 1780 | for (int i = 0; i < count; i++) { |
| 1781 | children[i].dispatchAttachedToWindow(info, visibility); |
| 1782 | } |
| 1783 | } |
| 1784 | |
svetoslavganov | 75986cf | 2009-05-14 22:28:01 -0700 | [diff] [blame] | 1785 | @Override |
| 1786 | public boolean dispatchPopulateAccessibilityEvent(AccessibilityEvent event) { |
| 1787 | boolean populated = false; |
| 1788 | for (int i = 0, count = getChildCount(); i < count; i++) { |
| 1789 | populated |= getChildAt(i).dispatchPopulateAccessibilityEvent(event); |
| 1790 | } |
| 1791 | return populated; |
| 1792 | } |
| 1793 | |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 1794 | /** |
| 1795 | * {@inheritDoc} |
| 1796 | */ |
| 1797 | @Override |
| 1798 | void dispatchDetachedFromWindow() { |
Jeff Brown | 20e987b | 2010-08-23 12:01:02 -0700 | [diff] [blame] | 1799 | // If we still have a touch target, we are still in the process of |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 1800 | // dispatching motion events to a child; we need to get rid of that |
| 1801 | // child to avoid dispatching events to it after the window is torn |
| 1802 | // down. To make sure we keep the child in a consistent state, we |
| 1803 | // first send it an ACTION_CANCEL motion event. |
Jeff Brown | 20e987b | 2010-08-23 12:01:02 -0700 | [diff] [blame] | 1804 | cancelAndClearTouchTargets(null); |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 1805 | |
| 1806 | final int count = mChildrenCount; |
| 1807 | final View[] children = mChildren; |
| 1808 | for (int i = 0; i < count; i++) { |
| 1809 | children[i].dispatchDetachedFromWindow(); |
| 1810 | } |
| 1811 | super.dispatchDetachedFromWindow(); |
| 1812 | } |
| 1813 | |
| 1814 | /** |
| 1815 | * {@inheritDoc} |
| 1816 | */ |
| 1817 | @Override |
| 1818 | public void setPadding(int left, int top, int right, int bottom) { |
| 1819 | super.setPadding(left, top, right, bottom); |
| 1820 | |
| 1821 | if ((mPaddingLeft | mPaddingTop | mPaddingRight | mPaddingRight) != 0) { |
| 1822 | mGroupFlags |= FLAG_PADDING_NOT_NULL; |
| 1823 | } else { |
| 1824 | mGroupFlags &= ~FLAG_PADDING_NOT_NULL; |
| 1825 | } |
| 1826 | } |
| 1827 | |
| 1828 | /** |
| 1829 | * {@inheritDoc} |
| 1830 | */ |
| 1831 | @Override |
| 1832 | protected void dispatchSaveInstanceState(SparseArray<Parcelable> container) { |
| 1833 | super.dispatchSaveInstanceState(container); |
| 1834 | final int count = mChildrenCount; |
| 1835 | final View[] children = mChildren; |
| 1836 | for (int i = 0; i < count; i++) { |
Dianne Hackborn | b4bc78b | 2010-05-12 18:59:50 -0700 | [diff] [blame] | 1837 | View c = children[i]; |
| 1838 | if ((c.mViewFlags & PARENT_SAVE_DISABLED_MASK) != PARENT_SAVE_DISABLED) { |
| 1839 | c.dispatchSaveInstanceState(container); |
| 1840 | } |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 1841 | } |
| 1842 | } |
| 1843 | |
| 1844 | /** |
| 1845 | * Perform dispatching of a {@link #saveHierarchyState freeze()} to only this view, |
| 1846 | * not to its children. For use when overriding |
| 1847 | * {@link #dispatchSaveInstanceState dispatchFreeze()} to allow subclasses to freeze |
| 1848 | * their own state but not the state of their children. |
| 1849 | * |
| 1850 | * @param container the container |
| 1851 | */ |
| 1852 | protected void dispatchFreezeSelfOnly(SparseArray<Parcelable> container) { |
| 1853 | super.dispatchSaveInstanceState(container); |
| 1854 | } |
| 1855 | |
| 1856 | /** |
| 1857 | * {@inheritDoc} |
| 1858 | */ |
| 1859 | @Override |
| 1860 | protected void dispatchRestoreInstanceState(SparseArray<Parcelable> container) { |
| 1861 | super.dispatchRestoreInstanceState(container); |
| 1862 | final int count = mChildrenCount; |
| 1863 | final View[] children = mChildren; |
| 1864 | for (int i = 0; i < count; i++) { |
Dianne Hackborn | b4bc78b | 2010-05-12 18:59:50 -0700 | [diff] [blame] | 1865 | View c = children[i]; |
| 1866 | if ((c.mViewFlags & PARENT_SAVE_DISABLED_MASK) != PARENT_SAVE_DISABLED) { |
| 1867 | c.dispatchRestoreInstanceState(container); |
| 1868 | } |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 1869 | } |
| 1870 | } |
| 1871 | |
| 1872 | /** |
| 1873 | * Perform dispatching of a {@link #restoreHierarchyState thaw()} to only this view, |
| 1874 | * not to its children. For use when overriding |
| 1875 | * {@link #dispatchRestoreInstanceState dispatchThaw()} to allow subclasses to thaw |
| 1876 | * their own state but not the state of their children. |
| 1877 | * |
| 1878 | * @param container the container |
| 1879 | */ |
| 1880 | protected void dispatchThawSelfOnly(SparseArray<Parcelable> container) { |
| 1881 | super.dispatchRestoreInstanceState(container); |
| 1882 | } |
| 1883 | |
| 1884 | /** |
| 1885 | * Enables or disables the drawing cache for each child of this view group. |
| 1886 | * |
| 1887 | * @param enabled true to enable the cache, false to dispose of it |
| 1888 | */ |
| 1889 | protected void setChildrenDrawingCacheEnabled(boolean enabled) { |
| 1890 | if (enabled || (mPersistentDrawingCache & PERSISTENT_ALL_CACHES) != PERSISTENT_ALL_CACHES) { |
| 1891 | final View[] children = mChildren; |
| 1892 | final int count = mChildrenCount; |
| 1893 | for (int i = 0; i < count; i++) { |
| 1894 | children[i].setDrawingCacheEnabled(enabled); |
| 1895 | } |
| 1896 | } |
| 1897 | } |
| 1898 | |
| 1899 | @Override |
| 1900 | protected void onAnimationStart() { |
| 1901 | super.onAnimationStart(); |
| 1902 | |
| 1903 | // When this ViewGroup's animation starts, build the cache for the children |
| 1904 | if ((mGroupFlags & FLAG_ANIMATION_CACHE) == FLAG_ANIMATION_CACHE) { |
| 1905 | final int count = mChildrenCount; |
| 1906 | final View[] children = mChildren; |
Romain Guy | 0d9275e | 2010-10-26 14:22:30 -0700 | [diff] [blame] | 1907 | final boolean buildCache = !isHardwareAccelerated(); |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 1908 | |
| 1909 | for (int i = 0; i < count; i++) { |
| 1910 | final View child = children[i]; |
| 1911 | if ((child.mViewFlags & VISIBILITY_MASK) == VISIBLE) { |
| 1912 | child.setDrawingCacheEnabled(true); |
Romain Guy | 0d9275e | 2010-10-26 14:22:30 -0700 | [diff] [blame] | 1913 | if (buildCache) { |
| 1914 | child.buildDrawingCache(true); |
| 1915 | } |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 1916 | } |
| 1917 | } |
| 1918 | |
| 1919 | mGroupFlags |= FLAG_CHILDREN_DRAWN_WITH_CACHE; |
| 1920 | } |
| 1921 | } |
| 1922 | |
| 1923 | @Override |
| 1924 | protected void onAnimationEnd() { |
| 1925 | super.onAnimationEnd(); |
| 1926 | |
| 1927 | // When this ViewGroup's animation ends, destroy the cache of the children |
| 1928 | if ((mGroupFlags & FLAG_ANIMATION_CACHE) == FLAG_ANIMATION_CACHE) { |
| 1929 | mGroupFlags &= ~FLAG_CHILDREN_DRAWN_WITH_CACHE; |
| 1930 | |
| 1931 | if ((mPersistentDrawingCache & PERSISTENT_ANIMATION_CACHE) == 0) { |
| 1932 | setChildrenDrawingCacheEnabled(false); |
| 1933 | } |
| 1934 | } |
| 1935 | } |
| 1936 | |
Romain Guy | 223ff5c | 2010-03-02 17:07:47 -0800 | [diff] [blame] | 1937 | @Override |
| 1938 | Bitmap createSnapshot(Bitmap.Config quality, int backgroundColor, boolean skipChildren) { |
Romain Guy | 65554f2 | 2010-03-22 18:58:21 -0700 | [diff] [blame] | 1939 | int count = mChildrenCount; |
| 1940 | int[] visibilities = null; |
| 1941 | |
Romain Guy | 223ff5c | 2010-03-02 17:07:47 -0800 | [diff] [blame] | 1942 | if (skipChildren) { |
Romain Guy | 65554f2 | 2010-03-22 18:58:21 -0700 | [diff] [blame] | 1943 | visibilities = new int[count]; |
| 1944 | for (int i = 0; i < count; i++) { |
| 1945 | View child = getChildAt(i); |
| 1946 | visibilities[i] = child.getVisibility(); |
| 1947 | if (visibilities[i] == View.VISIBLE) { |
| 1948 | child.setVisibility(INVISIBLE); |
| 1949 | } |
| 1950 | } |
Romain Guy | 223ff5c | 2010-03-02 17:07:47 -0800 | [diff] [blame] | 1951 | } |
| 1952 | |
| 1953 | Bitmap b = super.createSnapshot(quality, backgroundColor, skipChildren); |
Romain Guy | 65554f2 | 2010-03-22 18:58:21 -0700 | [diff] [blame] | 1954 | |
| 1955 | if (skipChildren) { |
| 1956 | for (int i = 0; i < count; i++) { |
| 1957 | getChildAt(i).setVisibility(visibilities[i]); |
Chet Haase | 5c13d89 | 2010-10-08 08:37:55 -0700 | [diff] [blame] | 1958 | } |
Romain Guy | 65554f2 | 2010-03-22 18:58:21 -0700 | [diff] [blame] | 1959 | } |
Romain Guy | 223ff5c | 2010-03-02 17:07:47 -0800 | [diff] [blame] | 1960 | |
| 1961 | return b; |
| 1962 | } |
| 1963 | |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 1964 | /** |
| 1965 | * {@inheritDoc} |
| 1966 | */ |
| 1967 | @Override |
| 1968 | protected void dispatchDraw(Canvas canvas) { |
| 1969 | final int count = mChildrenCount; |
| 1970 | final View[] children = mChildren; |
| 1971 | int flags = mGroupFlags; |
| 1972 | |
| 1973 | if ((flags & FLAG_RUN_ANIMATION) != 0 && canAnimate()) { |
| 1974 | final boolean cache = (mGroupFlags & FLAG_ANIMATION_CACHE) == FLAG_ANIMATION_CACHE; |
| 1975 | |
Romain Guy | 0d9275e | 2010-10-26 14:22:30 -0700 | [diff] [blame] | 1976 | final boolean buildCache = !isHardwareAccelerated(); |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 1977 | for (int i = 0; i < count; i++) { |
| 1978 | final View child = children[i]; |
| 1979 | if ((child.mViewFlags & VISIBILITY_MASK) == VISIBLE) { |
| 1980 | final LayoutParams params = child.getLayoutParams(); |
| 1981 | attachLayoutAnimationParameters(child, params, i, count); |
| 1982 | bindLayoutAnimation(child); |
| 1983 | if (cache) { |
| 1984 | child.setDrawingCacheEnabled(true); |
Romain Guy | 0d9275e | 2010-10-26 14:22:30 -0700 | [diff] [blame] | 1985 | if (buildCache) { |
| 1986 | child.buildDrawingCache(true); |
| 1987 | } |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 1988 | } |
| 1989 | } |
| 1990 | } |
| 1991 | |
| 1992 | final LayoutAnimationController controller = mLayoutAnimationController; |
| 1993 | if (controller.willOverlap()) { |
| 1994 | mGroupFlags |= FLAG_OPTIMIZE_INVALIDATE; |
| 1995 | } |
| 1996 | |
| 1997 | controller.start(); |
| 1998 | |
| 1999 | mGroupFlags &= ~FLAG_RUN_ANIMATION; |
| 2000 | mGroupFlags &= ~FLAG_ANIMATION_DONE; |
| 2001 | |
| 2002 | if (cache) { |
| 2003 | mGroupFlags |= FLAG_CHILDREN_DRAWN_WITH_CACHE; |
| 2004 | } |
| 2005 | |
| 2006 | if (mAnimationListener != null) { |
| 2007 | mAnimationListener.onAnimationStart(controller.getAnimation()); |
| 2008 | } |
| 2009 | } |
| 2010 | |
| 2011 | int saveCount = 0; |
| 2012 | final boolean clipToPadding = (flags & CLIP_TO_PADDING_MASK) == CLIP_TO_PADDING_MASK; |
| 2013 | if (clipToPadding) { |
| 2014 | saveCount = canvas.save(); |
Romain Guy | 8f2d94f | 2009-03-25 18:04:42 -0700 | [diff] [blame] | 2015 | canvas.clipRect(mScrollX + mPaddingLeft, mScrollY + mPaddingTop, |
| 2016 | mScrollX + mRight - mLeft - mPaddingRight, |
| 2017 | mScrollY + mBottom - mTop - mPaddingBottom); |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 2018 | |
| 2019 | } |
| 2020 | |
| 2021 | // We will draw our child's animation, let's reset the flag |
| 2022 | mPrivateFlags &= ~DRAW_ANIMATION; |
| 2023 | mGroupFlags &= ~FLAG_INVALIDATE_REQUIRED; |
| 2024 | |
| 2025 | boolean more = false; |
| 2026 | final long drawingTime = getDrawingTime(); |
| 2027 | |
| 2028 | if ((flags & FLAG_USE_CHILD_DRAWING_ORDER) == 0) { |
| 2029 | for (int i = 0; i < count; i++) { |
| 2030 | final View child = children[i]; |
| 2031 | if ((child.mViewFlags & VISIBILITY_MASK) == VISIBLE || child.getAnimation() != null) { |
| 2032 | more |= drawChild(canvas, child, drawingTime); |
| 2033 | } |
| 2034 | } |
| 2035 | } else { |
| 2036 | for (int i = 0; i < count; i++) { |
| 2037 | final View child = children[getChildDrawingOrder(count, i)]; |
| 2038 | if ((child.mViewFlags & VISIBILITY_MASK) == VISIBLE || child.getAnimation() != null) { |
| 2039 | more |= drawChild(canvas, child, drawingTime); |
| 2040 | } |
| 2041 | } |
| 2042 | } |
| 2043 | |
| 2044 | // Draw any disappearing views that have animations |
| 2045 | if (mDisappearingChildren != null) { |
| 2046 | final ArrayList<View> disappearingChildren = mDisappearingChildren; |
| 2047 | final int disappearingCount = disappearingChildren.size() - 1; |
| 2048 | // Go backwards -- we may delete as animations finish |
| 2049 | for (int i = disappearingCount; i >= 0; i--) { |
| 2050 | final View child = disappearingChildren.get(i); |
| 2051 | more |= drawChild(canvas, child, drawingTime); |
| 2052 | } |
| 2053 | } |
| 2054 | |
| 2055 | if (clipToPadding) { |
| 2056 | canvas.restoreToCount(saveCount); |
| 2057 | } |
| 2058 | |
| 2059 | // mGroupFlags might have been updated by drawChild() |
| 2060 | flags = mGroupFlags; |
| 2061 | |
| 2062 | if ((flags & FLAG_INVALIDATE_REQUIRED) == FLAG_INVALIDATE_REQUIRED) { |
| 2063 | invalidate(); |
| 2064 | } |
| 2065 | |
| 2066 | if ((flags & FLAG_ANIMATION_DONE) == 0 && (flags & FLAG_NOTIFY_ANIMATION_LISTENER) == 0 && |
| 2067 | mLayoutAnimationController.isDone() && !more) { |
| 2068 | // We want to erase the drawing cache and notify the listener after the |
| 2069 | // next frame is drawn because one extra invalidate() is caused by |
| 2070 | // drawChild() after the animation is over |
| 2071 | mGroupFlags |= FLAG_NOTIFY_ANIMATION_LISTENER; |
| 2072 | final Runnable end = new Runnable() { |
| 2073 | public void run() { |
| 2074 | notifyAnimationListener(); |
| 2075 | } |
| 2076 | }; |
| 2077 | post(end); |
| 2078 | } |
| 2079 | } |
Romain Guy | 8506ab4 | 2009-06-11 17:35:47 -0700 | [diff] [blame] | 2080 | |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 2081 | /** |
| 2082 | * Returns the index of the child to draw for this iteration. Override this |
| 2083 | * if you want to change the drawing order of children. By default, it |
| 2084 | * returns i. |
| 2085 | * <p> |
Romain Guy | 293451e | 2009-11-04 13:59:48 -0800 | [diff] [blame] | 2086 | * NOTE: In order for this method to be called, you must enable child ordering |
| 2087 | * first by calling {@link #setChildrenDrawingOrderEnabled(boolean)}. |
Romain Guy | 8506ab4 | 2009-06-11 17:35:47 -0700 | [diff] [blame] | 2088 | * |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 2089 | * @param i The current iteration. |
| 2090 | * @return The index of the child to draw this iteration. |
Chet Haase | 5c13d89 | 2010-10-08 08:37:55 -0700 | [diff] [blame] | 2091 | * |
Romain Guy | 293451e | 2009-11-04 13:59:48 -0800 | [diff] [blame] | 2092 | * @see #setChildrenDrawingOrderEnabled(boolean) |
| 2093 | * @see #isChildrenDrawingOrderEnabled() |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 2094 | */ |
| 2095 | protected int getChildDrawingOrder(int childCount, int i) { |
| 2096 | return i; |
| 2097 | } |
Romain Guy | 8506ab4 | 2009-06-11 17:35:47 -0700 | [diff] [blame] | 2098 | |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 2099 | private void notifyAnimationListener() { |
| 2100 | mGroupFlags &= ~FLAG_NOTIFY_ANIMATION_LISTENER; |
| 2101 | mGroupFlags |= FLAG_ANIMATION_DONE; |
| 2102 | |
| 2103 | if (mAnimationListener != null) { |
| 2104 | final Runnable end = new Runnable() { |
| 2105 | public void run() { |
| 2106 | mAnimationListener.onAnimationEnd(mLayoutAnimationController.getAnimation()); |
| 2107 | } |
| 2108 | }; |
| 2109 | post(end); |
| 2110 | } |
| 2111 | |
| 2112 | if ((mGroupFlags & FLAG_ANIMATION_CACHE) == FLAG_ANIMATION_CACHE) { |
| 2113 | mGroupFlags &= ~FLAG_CHILDREN_DRAWN_WITH_CACHE; |
| 2114 | if ((mPersistentDrawingCache & PERSISTENT_ANIMATION_CACHE) == 0) { |
| 2115 | setChildrenDrawingCacheEnabled(false); |
| 2116 | } |
| 2117 | } |
| 2118 | |
| 2119 | invalidate(); |
| 2120 | } |
| 2121 | |
| 2122 | /** |
| 2123 | * Draw one child of this View Group. This method is responsible for getting |
| 2124 | * the canvas in the right state. This includes clipping, translating so |
| 2125 | * that the child's scrolled origin is at 0, 0, and applying any animation |
| 2126 | * transformations. |
| 2127 | * |
| 2128 | * @param canvas The canvas on which to draw the child |
| 2129 | * @param child Who to draw |
| 2130 | * @param drawingTime The time at which draw is occuring |
| 2131 | * @return True if an invalidate() was issued |
| 2132 | */ |
| 2133 | protected boolean drawChild(Canvas canvas, View child, long drawingTime) { |
| 2134 | boolean more = false; |
| 2135 | |
| 2136 | final int cl = child.mLeft; |
| 2137 | final int ct = child.mTop; |
| 2138 | final int cr = child.mRight; |
| 2139 | final int cb = child.mBottom; |
| 2140 | |
Chet Haase | 70d4ba1 | 2010-10-06 09:46:45 -0700 | [diff] [blame] | 2141 | final boolean childHasIdentityMatrix = child.hasIdentityMatrix(); |
| 2142 | |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 2143 | final int flags = mGroupFlags; |
| 2144 | |
| 2145 | if ((flags & FLAG_CLEAR_TRANSFORMATION) == FLAG_CLEAR_TRANSFORMATION) { |
Chet Haase | 4846032 | 2010-06-11 14:22:25 -0700 | [diff] [blame] | 2146 | mChildTransformation.clear(); |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 2147 | mGroupFlags &= ~FLAG_CLEAR_TRANSFORMATION; |
| 2148 | } |
| 2149 | |
| 2150 | Transformation transformToApply = null; |
Chet Haase | 4846032 | 2010-06-11 14:22:25 -0700 | [diff] [blame] | 2151 | Transformation invalidationTransform; |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 2152 | final Animation a = child.getAnimation(); |
| 2153 | boolean concatMatrix = false; |
| 2154 | |
Chet Haase | 4846032 | 2010-06-11 14:22:25 -0700 | [diff] [blame] | 2155 | boolean scalingRequired = false; |
| 2156 | boolean caching = false; |
Romain Guy | b051e89 | 2010-09-28 19:09:36 -0700 | [diff] [blame] | 2157 | if ((flags & FLAG_CHILDREN_DRAWN_WITH_CACHE) == FLAG_CHILDREN_DRAWN_WITH_CACHE || |
Chet Haase | 4846032 | 2010-06-11 14:22:25 -0700 | [diff] [blame] | 2158 | (flags & FLAG_ALWAYS_DRAWN_WITH_CACHE) == FLAG_ALWAYS_DRAWN_WITH_CACHE) { |
| 2159 | caching = true; |
| 2160 | if (mAttachInfo != null) scalingRequired = mAttachInfo.mScalingRequired; |
| 2161 | } |
| 2162 | |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 2163 | if (a != null) { |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 2164 | final boolean initialized = a.isInitialized(); |
| 2165 | if (!initialized) { |
Romain Guy | 8f2d94f | 2009-03-25 18:04:42 -0700 | [diff] [blame] | 2166 | a.initialize(cr - cl, cb - ct, getWidth(), getHeight()); |
| 2167 | a.initializeInvalidateRegion(0, 0, cr - cl, cb - ct); |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 2168 | child.onAnimationStart(); |
| 2169 | } |
| 2170 | |
Chet Haase | 4846032 | 2010-06-11 14:22:25 -0700 | [diff] [blame] | 2171 | more = a.getTransformation(drawingTime, mChildTransformation, |
| 2172 | scalingRequired ? mAttachInfo.mApplicationScale : 1f); |
| 2173 | if (scalingRequired && mAttachInfo.mApplicationScale != 1f) { |
| 2174 | if (mInvalidationTransformation == null) { |
| 2175 | mInvalidationTransformation = new Transformation(); |
| 2176 | } |
| 2177 | invalidationTransform = mInvalidationTransformation; |
| 2178 | a.getTransformation(drawingTime, invalidationTransform, 1f); |
| 2179 | } else { |
| 2180 | invalidationTransform = mChildTransformation; |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 2181 | } |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 2182 | transformToApply = mChildTransformation; |
| 2183 | |
| 2184 | concatMatrix = a.willChangeTransformationMatrix(); |
| 2185 | |
| 2186 | if (more) { |
| 2187 | if (!a.willChangeBounds()) { |
| 2188 | if ((flags & (FLAG_OPTIMIZE_INVALIDATE | FLAG_ANIMATION_DONE)) == |
| 2189 | FLAG_OPTIMIZE_INVALIDATE) { |
| 2190 | mGroupFlags |= FLAG_INVALIDATE_REQUIRED; |
| 2191 | } else if ((flags & FLAG_INVALIDATE_REQUIRED) == 0) { |
| 2192 | // The child need to draw an animation, potentially offscreen, so |
| 2193 | // make sure we do not cancel invalidate requests |
| 2194 | mPrivateFlags |= DRAW_ANIMATION; |
| 2195 | invalidate(cl, ct, cr, cb); |
| 2196 | } |
| 2197 | } else { |
Chet Haase | 4846032 | 2010-06-11 14:22:25 -0700 | [diff] [blame] | 2198 | if (mInvalidateRegion == null) { |
| 2199 | mInvalidateRegion = new RectF(); |
| 2200 | } |
| 2201 | final RectF region = mInvalidateRegion; |
| 2202 | a.getInvalidateRegion(0, 0, cr - cl, cb - ct, region, invalidationTransform); |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 2203 | |
| 2204 | // The child need to draw an animation, potentially offscreen, so |
| 2205 | // make sure we do not cancel invalidate requests |
| 2206 | mPrivateFlags |= DRAW_ANIMATION; |
The Android Open Source Project | 4df2423 | 2009-03-05 14:34:35 -0800 | [diff] [blame] | 2207 | |
| 2208 | final int left = cl + (int) region.left; |
| 2209 | final int top = ct + (int) region.top; |
| 2210 | invalidate(left, top, left + (int) region.width(), top + (int) region.height()); |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 2211 | } |
| 2212 | } |
| 2213 | } else if ((flags & FLAG_SUPPORT_STATIC_TRANSFORMATIONS) == |
| 2214 | FLAG_SUPPORT_STATIC_TRANSFORMATIONS) { |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 2215 | final boolean hasTransform = getChildStaticTransformation(child, mChildTransformation); |
| 2216 | if (hasTransform) { |
| 2217 | final int transformType = mChildTransformation.getTransformationType(); |
| 2218 | transformToApply = transformType != Transformation.TYPE_IDENTITY ? |
| 2219 | mChildTransformation : null; |
| 2220 | concatMatrix = (transformType & Transformation.TYPE_MATRIX) != 0; |
| 2221 | } |
| 2222 | } |
| 2223 | |
Chet Haase | 70d4ba1 | 2010-10-06 09:46:45 -0700 | [diff] [blame] | 2224 | concatMatrix |= !childHasIdentityMatrix; |
Chet Haase | df030d2 | 2010-07-30 17:22:38 -0700 | [diff] [blame] | 2225 | |
Romain Guy | 5bcdff4 | 2009-05-14 21:27:18 -0700 | [diff] [blame] | 2226 | // Sets the flag as early as possible to allow draw() implementations |
Romain Guy | 986003d | 2009-03-25 17:42:35 -0700 | [diff] [blame] | 2227 | // to call invalidate() successfully when doing animations |
Romain Guy | 5bcdff4 | 2009-05-14 21:27:18 -0700 | [diff] [blame] | 2228 | child.mPrivateFlags |= DRAWN; |
Romain Guy | 986003d | 2009-03-25 17:42:35 -0700 | [diff] [blame] | 2229 | |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 2230 | if (!concatMatrix && canvas.quickReject(cl, ct, cr, cb, Canvas.EdgeType.BW) && |
| 2231 | (child.mPrivateFlags & DRAW_ANIMATION) == 0) { |
| 2232 | return more; |
| 2233 | } |
Chet Haase | 5c13d89 | 2010-10-08 08:37:55 -0700 | [diff] [blame] | 2234 | |
Romain Guy | dbc26d2 | 2010-10-11 17:58:29 -0700 | [diff] [blame] | 2235 | float alpha = child.getAlpha(); |
| 2236 | // Bail out early if the view does not need to be drawn |
Romain Guy | 67a2f7b | 2010-10-13 15:35:22 -0700 | [diff] [blame] | 2237 | if (alpha <= ViewConfiguration.ALPHA_THRESHOLD && (child.mPrivateFlags & ALPHA_SET) == 0 && |
| 2238 | !(child instanceof SurfaceView)) { |
Romain Guy | a3496a9 | 2010-10-12 11:53:24 -0700 | [diff] [blame] | 2239 | return more; |
| 2240 | } |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 2241 | |
| 2242 | child.computeScroll(); |
| 2243 | |
| 2244 | final int sx = child.mScrollX; |
| 2245 | final int sy = child.mScrollY; |
| 2246 | |
Romain Guy | b051e89 | 2010-09-28 19:09:36 -0700 | [diff] [blame] | 2247 | DisplayList displayList = null; |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 2248 | Bitmap cache = null; |
Chet Haase | 4846032 | 2010-06-11 14:22:25 -0700 | [diff] [blame] | 2249 | if (caching) { |
Romain Guy | b051e89 | 2010-09-28 19:09:36 -0700 | [diff] [blame] | 2250 | if (!canvas.isHardwareAccelerated()) { |
| 2251 | cache = child.getDrawingCache(true); |
| 2252 | } else { |
Romain Guy | 0d9275e | 2010-10-26 14:22:30 -0700 | [diff] [blame] | 2253 | displayList = child.getDisplayList(); |
Romain Guy | b051e89 | 2010-09-28 19:09:36 -0700 | [diff] [blame] | 2254 | } |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 2255 | } |
| 2256 | |
Romain Guy | b051e89 | 2010-09-28 19:09:36 -0700 | [diff] [blame] | 2257 | final boolean hasDisplayList = displayList != null && displayList.isReady(); |
| 2258 | final boolean hasNoCache = cache == null || hasDisplayList; |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 2259 | |
| 2260 | final int restoreTo = canvas.save(); |
| 2261 | if (hasNoCache) { |
| 2262 | canvas.translate(cl - sx, ct - sy); |
| 2263 | } else { |
| 2264 | canvas.translate(cl, ct); |
Romain Guy | 8506ab4 | 2009-06-11 17:35:47 -0700 | [diff] [blame] | 2265 | if (scalingRequired) { |
Romain Guy | cafdea6 | 2009-06-12 10:51:36 -0700 | [diff] [blame] | 2266 | // mAttachInfo cannot be null, otherwise scalingRequired == false |
Romain Guy | 8506ab4 | 2009-06-11 17:35:47 -0700 | [diff] [blame] | 2267 | final float scale = 1.0f / mAttachInfo.mApplicationScale; |
| 2268 | canvas.scale(scale, scale); |
| 2269 | } |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 2270 | } |
| 2271 | |
Romain Guy | 33e72ae | 2010-07-17 12:40:29 -0700 | [diff] [blame] | 2272 | if (transformToApply != null || alpha < 1.0f || !child.hasIdentityMatrix()) { |
Chet Haase | 70d4ba1 | 2010-10-06 09:46:45 -0700 | [diff] [blame] | 2273 | if (transformToApply != null || !childHasIdentityMatrix) { |
| 2274 | int transX = 0; |
| 2275 | int transY = 0; |
Romain Guy | 33e72ae | 2010-07-17 12:40:29 -0700 | [diff] [blame] | 2276 | |
Chet Haase | 70d4ba1 | 2010-10-06 09:46:45 -0700 | [diff] [blame] | 2277 | if (hasNoCache) { |
| 2278 | transX = -sx; |
| 2279 | transY = -sy; |
| 2280 | } |
Romain Guy | 33e72ae | 2010-07-17 12:40:29 -0700 | [diff] [blame] | 2281 | |
Chet Haase | 70d4ba1 | 2010-10-06 09:46:45 -0700 | [diff] [blame] | 2282 | if (transformToApply != null) { |
| 2283 | if (concatMatrix) { |
| 2284 | // Undo the scroll translation, apply the transformation matrix, |
| 2285 | // then redo the scroll translate to get the correct result. |
| 2286 | canvas.translate(-transX, -transY); |
| 2287 | canvas.concat(transformToApply.getMatrix()); |
| 2288 | canvas.translate(transX, transY); |
| 2289 | mGroupFlags |= FLAG_CLEAR_TRANSFORMATION; |
| 2290 | } |
| 2291 | |
| 2292 | float transformAlpha = transformToApply.getAlpha(); |
| 2293 | if (transformAlpha < 1.0f) { |
| 2294 | alpha *= transformToApply.getAlpha(); |
| 2295 | mGroupFlags |= FLAG_CLEAR_TRANSFORMATION; |
| 2296 | } |
| 2297 | } |
| 2298 | |
| 2299 | if (!childHasIdentityMatrix) { |
Chet Haase | c3aa361 | 2010-06-17 08:50:37 -0700 | [diff] [blame] | 2300 | canvas.translate(-transX, -transY); |
Chet Haase | 70d4ba1 | 2010-10-06 09:46:45 -0700 | [diff] [blame] | 2301 | canvas.concat(child.getMatrix()); |
Chet Haase | c3aa361 | 2010-06-17 08:50:37 -0700 | [diff] [blame] | 2302 | canvas.translate(transX, transY); |
Chet Haase | c3aa361 | 2010-06-17 08:50:37 -0700 | [diff] [blame] | 2303 | } |
Chet Haase | c3aa361 | 2010-06-17 08:50:37 -0700 | [diff] [blame] | 2304 | } |
Romain Guy | 33e72ae | 2010-07-17 12:40:29 -0700 | [diff] [blame] | 2305 | |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 2306 | if (alpha < 1.0f) { |
| 2307 | mGroupFlags |= FLAG_CLEAR_TRANSFORMATION; |
Romain Guy | 33e72ae | 2010-07-17 12:40:29 -0700 | [diff] [blame] | 2308 | if (hasNoCache) { |
| 2309 | final int multipliedAlpha = (int) (255 * alpha); |
| 2310 | if (!child.onSetAlpha(multipliedAlpha)) { |
Romain Guy | fd88042 | 2010-09-23 16:16:04 -0700 | [diff] [blame] | 2311 | int layerFlags = Canvas.HAS_ALPHA_LAYER_SAVE_FLAG; |
| 2312 | if ((flags & FLAG_CLIP_CHILDREN) == FLAG_CLIP_CHILDREN) { |
| 2313 | layerFlags |= Canvas.CLIP_TO_LAYER_SAVE_FLAG; |
| 2314 | } |
Romain Guy | 33e72ae | 2010-07-17 12:40:29 -0700 | [diff] [blame] | 2315 | canvas.saveLayerAlpha(sx, sy, sx + cr - cl, sy + cb - ct, multipliedAlpha, |
Romain Guy | fd88042 | 2010-09-23 16:16:04 -0700 | [diff] [blame] | 2316 | layerFlags); |
Romain Guy | 33e72ae | 2010-07-17 12:40:29 -0700 | [diff] [blame] | 2317 | } else { |
| 2318 | child.mPrivateFlags |= ALPHA_SET; |
| 2319 | } |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 2320 | } |
| 2321 | } |
| 2322 | } else if ((child.mPrivateFlags & ALPHA_SET) == ALPHA_SET) { |
| 2323 | child.onSetAlpha(255); |
Romain Guy | 9b34d45 | 2010-09-02 11:45:04 -0700 | [diff] [blame] | 2324 | child.mPrivateFlags &= ~ALPHA_SET; |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 2325 | } |
| 2326 | |
| 2327 | if ((flags & FLAG_CLIP_CHILDREN) == FLAG_CLIP_CHILDREN) { |
| 2328 | if (hasNoCache) { |
Romain Guy | 8f2d94f | 2009-03-25 18:04:42 -0700 | [diff] [blame] | 2329 | canvas.clipRect(sx, sy, sx + (cr - cl), sy + (cb - ct)); |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 2330 | } else { |
Romain Guy | 8506ab4 | 2009-06-11 17:35:47 -0700 | [diff] [blame] | 2331 | if (!scalingRequired) { |
| 2332 | canvas.clipRect(0, 0, cr - cl, cb - ct); |
| 2333 | } else { |
| 2334 | canvas.clipRect(0, 0, cache.getWidth(), cache.getHeight()); |
| 2335 | } |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 2336 | } |
| 2337 | } |
| 2338 | |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 2339 | if (hasNoCache) { |
Romain Guy | b051e89 | 2010-09-28 19:09:36 -0700 | [diff] [blame] | 2340 | if (!hasDisplayList) { |
| 2341 | // Fast path for layouts with no backgrounds |
| 2342 | if ((child.mPrivateFlags & SKIP_DRAW) == SKIP_DRAW) { |
| 2343 | if (ViewDebug.TRACE_HIERARCHY) { |
| 2344 | ViewDebug.trace(this, ViewDebug.HierarchyTraceType.DRAW); |
| 2345 | } |
| 2346 | child.mPrivateFlags &= ~DIRTY_MASK; |
| 2347 | child.dispatchDraw(canvas); |
| 2348 | } else { |
| 2349 | child.draw(canvas); |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 2350 | } |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 2351 | } else { |
Romain Guy | b051e89 | 2010-09-28 19:09:36 -0700 | [diff] [blame] | 2352 | ((HardwareCanvas) canvas).drawDisplayList(displayList); |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 2353 | } |
Romain Guy | b051e89 | 2010-09-28 19:09:36 -0700 | [diff] [blame] | 2354 | } else if (cache != null) { |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 2355 | final Paint cachePaint = mCachePaint; |
| 2356 | if (alpha < 1.0f) { |
| 2357 | cachePaint.setAlpha((int) (alpha * 255)); |
| 2358 | mGroupFlags |= FLAG_ALPHA_LOWER_THAN_ONE; |
| 2359 | } else if ((flags & FLAG_ALPHA_LOWER_THAN_ONE) == FLAG_ALPHA_LOWER_THAN_ONE) { |
| 2360 | cachePaint.setAlpha(255); |
| 2361 | mGroupFlags &= ~FLAG_ALPHA_LOWER_THAN_ONE; |
| 2362 | } |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 2363 | canvas.drawBitmap(cache, 0.0f, 0.0f, cachePaint); |
| 2364 | } |
| 2365 | |
| 2366 | canvas.restoreToCount(restoreTo); |
| 2367 | |
| 2368 | if (a != null && !more) { |
| 2369 | child.onSetAlpha(255); |
| 2370 | finishAnimatingView(child, a); |
| 2371 | } |
| 2372 | |
| 2373 | return more; |
| 2374 | } |
| 2375 | |
| 2376 | /** |
| 2377 | * By default, children are clipped to their bounds before drawing. This |
| 2378 | * allows view groups to override this behavior for animations, etc. |
| 2379 | * |
| 2380 | * @param clipChildren true to clip children to their bounds, |
| 2381 | * false otherwise |
| 2382 | * @attr ref android.R.styleable#ViewGroup_clipChildren |
| 2383 | */ |
| 2384 | public void setClipChildren(boolean clipChildren) { |
| 2385 | setBooleanFlag(FLAG_CLIP_CHILDREN, clipChildren); |
| 2386 | } |
| 2387 | |
| 2388 | /** |
| 2389 | * By default, children are clipped to the padding of the ViewGroup. This |
| 2390 | * allows view groups to override this behavior |
| 2391 | * |
| 2392 | * @param clipToPadding true to clip children to the padding of the |
| 2393 | * group, false otherwise |
| 2394 | * @attr ref android.R.styleable#ViewGroup_clipToPadding |
| 2395 | */ |
| 2396 | public void setClipToPadding(boolean clipToPadding) { |
| 2397 | setBooleanFlag(FLAG_CLIP_TO_PADDING, clipToPadding); |
| 2398 | } |
| 2399 | |
| 2400 | /** |
| 2401 | * {@inheritDoc} |
| 2402 | */ |
| 2403 | @Override |
| 2404 | public void dispatchSetSelected(boolean selected) { |
| 2405 | final View[] children = mChildren; |
| 2406 | final int count = mChildrenCount; |
| 2407 | for (int i = 0; i < count; i++) { |
Chet Haase | 5c13d89 | 2010-10-08 08:37:55 -0700 | [diff] [blame] | 2408 | |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 2409 | children[i].setSelected(selected); |
| 2410 | } |
| 2411 | } |
Romain Guy | 8506ab4 | 2009-06-11 17:35:47 -0700 | [diff] [blame] | 2412 | |
Dianne Hackborn | d0fa371 | 2010-09-14 18:57:14 -0700 | [diff] [blame] | 2413 | /** |
| 2414 | * {@inheritDoc} |
| 2415 | */ |
| 2416 | @Override |
| 2417 | public void dispatchSetActivated(boolean activated) { |
| 2418 | final View[] children = mChildren; |
| 2419 | final int count = mChildrenCount; |
| 2420 | for (int i = 0; i < count; i++) { |
| 2421 | |
| 2422 | children[i].setActivated(activated); |
| 2423 | } |
| 2424 | } |
| 2425 | |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 2426 | @Override |
| 2427 | protected void dispatchSetPressed(boolean pressed) { |
| 2428 | final View[] children = mChildren; |
| 2429 | final int count = mChildrenCount; |
| 2430 | for (int i = 0; i < count; i++) { |
| 2431 | children[i].setPressed(pressed); |
| 2432 | } |
| 2433 | } |
| 2434 | |
| 2435 | /** |
| 2436 | * When this property is set to true, this ViewGroup supports static transformations on |
| 2437 | * children; this causes |
| 2438 | * {@link #getChildStaticTransformation(View, android.view.animation.Transformation)} to be |
| 2439 | * invoked when a child is drawn. |
| 2440 | * |
| 2441 | * Any subclass overriding |
| 2442 | * {@link #getChildStaticTransformation(View, android.view.animation.Transformation)} should |
| 2443 | * set this property to true. |
| 2444 | * |
| 2445 | * @param enabled True to enable static transformations on children, false otherwise. |
| 2446 | * |
| 2447 | * @see #FLAG_SUPPORT_STATIC_TRANSFORMATIONS |
| 2448 | */ |
| 2449 | protected void setStaticTransformationsEnabled(boolean enabled) { |
| 2450 | setBooleanFlag(FLAG_SUPPORT_STATIC_TRANSFORMATIONS, enabled); |
| 2451 | } |
| 2452 | |
| 2453 | /** |
| 2454 | * {@inheritDoc} |
| 2455 | * |
Romain Guy | 8506ab4 | 2009-06-11 17:35:47 -0700 | [diff] [blame] | 2456 | * @see #setStaticTransformationsEnabled(boolean) |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 2457 | */ |
| 2458 | protected boolean getChildStaticTransformation(View child, Transformation t) { |
| 2459 | return false; |
| 2460 | } |
| 2461 | |
| 2462 | /** |
| 2463 | * {@hide} |
| 2464 | */ |
| 2465 | @Override |
| 2466 | protected View findViewTraversal(int id) { |
| 2467 | if (id == mID) { |
| 2468 | return this; |
| 2469 | } |
| 2470 | |
| 2471 | final View[] where = mChildren; |
| 2472 | final int len = mChildrenCount; |
| 2473 | |
| 2474 | for (int i = 0; i < len; i++) { |
| 2475 | View v = where[i]; |
| 2476 | |
| 2477 | if ((v.mPrivateFlags & IS_ROOT_NAMESPACE) == 0) { |
| 2478 | v = v.findViewById(id); |
| 2479 | |
| 2480 | if (v != null) { |
| 2481 | return v; |
| 2482 | } |
| 2483 | } |
| 2484 | } |
| 2485 | |
| 2486 | return null; |
| 2487 | } |
| 2488 | |
| 2489 | /** |
| 2490 | * {@hide} |
| 2491 | */ |
| 2492 | @Override |
| 2493 | protected View findViewWithTagTraversal(Object tag) { |
| 2494 | if (tag != null && tag.equals(mTag)) { |
| 2495 | return this; |
| 2496 | } |
| 2497 | |
| 2498 | final View[] where = mChildren; |
| 2499 | final int len = mChildrenCount; |
| 2500 | |
| 2501 | for (int i = 0; i < len; i++) { |
| 2502 | View v = where[i]; |
| 2503 | |
| 2504 | if ((v.mPrivateFlags & IS_ROOT_NAMESPACE) == 0) { |
| 2505 | v = v.findViewWithTag(tag); |
| 2506 | |
| 2507 | if (v != null) { |
| 2508 | return v; |
| 2509 | } |
| 2510 | } |
| 2511 | } |
| 2512 | |
| 2513 | return null; |
| 2514 | } |
| 2515 | |
| 2516 | /** |
| 2517 | * Adds a child view. If no layout parameters are already set on the child, the |
| 2518 | * default parameters for this ViewGroup are set on the child. |
| 2519 | * |
| 2520 | * @param child the child view to add |
| 2521 | * |
| 2522 | * @see #generateDefaultLayoutParams() |
| 2523 | */ |
| 2524 | public void addView(View child) { |
| 2525 | addView(child, -1); |
| 2526 | } |
| 2527 | |
| 2528 | /** |
| 2529 | * Adds a child view. If no layout parameters are already set on the child, the |
| 2530 | * default parameters for this ViewGroup are set on the child. |
| 2531 | * |
| 2532 | * @param child the child view to add |
| 2533 | * @param index the position at which to add the child |
| 2534 | * |
| 2535 | * @see #generateDefaultLayoutParams() |
| 2536 | */ |
| 2537 | public void addView(View child, int index) { |
| 2538 | LayoutParams params = child.getLayoutParams(); |
| 2539 | if (params == null) { |
| 2540 | params = generateDefaultLayoutParams(); |
| 2541 | if (params == null) { |
| 2542 | throw new IllegalArgumentException("generateDefaultLayoutParams() cannot return null"); |
| 2543 | } |
| 2544 | } |
| 2545 | addView(child, index, params); |
| 2546 | } |
| 2547 | |
| 2548 | /** |
| 2549 | * Adds a child view with this ViewGroup's default layout parameters and the |
| 2550 | * specified width and height. |
| 2551 | * |
| 2552 | * @param child the child view to add |
| 2553 | */ |
| 2554 | public void addView(View child, int width, int height) { |
| 2555 | final LayoutParams params = generateDefaultLayoutParams(); |
| 2556 | params.width = width; |
| 2557 | params.height = height; |
| 2558 | addView(child, -1, params); |
| 2559 | } |
| 2560 | |
| 2561 | /** |
| 2562 | * Adds a child view with the specified layout parameters. |
| 2563 | * |
| 2564 | * @param child the child view to add |
| 2565 | * @param params the layout parameters to set on the child |
| 2566 | */ |
| 2567 | public void addView(View child, LayoutParams params) { |
| 2568 | addView(child, -1, params); |
| 2569 | } |
| 2570 | |
| 2571 | /** |
| 2572 | * Adds a child view with the specified layout parameters. |
| 2573 | * |
| 2574 | * @param child the child view to add |
| 2575 | * @param index the position at which to add the child |
| 2576 | * @param params the layout parameters to set on the child |
| 2577 | */ |
| 2578 | public void addView(View child, int index, LayoutParams params) { |
| 2579 | if (DBG) { |
| 2580 | System.out.println(this + " addView"); |
| 2581 | } |
| 2582 | |
| 2583 | // addViewInner() will call child.requestLayout() when setting the new LayoutParams |
| 2584 | // therefore, we call requestLayout() on ourselves before, so that the child's request |
| 2585 | // will be blocked at our level |
| 2586 | requestLayout(); |
| 2587 | invalidate(); |
| 2588 | addViewInner(child, index, params, false); |
| 2589 | } |
| 2590 | |
| 2591 | /** |
| 2592 | * {@inheritDoc} |
| 2593 | */ |
| 2594 | public void updateViewLayout(View view, ViewGroup.LayoutParams params) { |
| 2595 | if (!checkLayoutParams(params)) { |
| 2596 | throw new IllegalArgumentException("Invalid LayoutParams supplied to " + this); |
| 2597 | } |
| 2598 | if (view.mParent != this) { |
| 2599 | throw new IllegalArgumentException("Given view not a child of " + this); |
| 2600 | } |
| 2601 | view.setLayoutParams(params); |
| 2602 | } |
| 2603 | |
| 2604 | /** |
| 2605 | * {@inheritDoc} |
| 2606 | */ |
| 2607 | protected boolean checkLayoutParams(ViewGroup.LayoutParams p) { |
| 2608 | return p != null; |
| 2609 | } |
| 2610 | |
| 2611 | /** |
| 2612 | * Interface definition for a callback to be invoked when the hierarchy |
| 2613 | * within this view changed. The hierarchy changes whenever a child is added |
| 2614 | * to or removed from this view. |
| 2615 | */ |
| 2616 | public interface OnHierarchyChangeListener { |
| 2617 | /** |
| 2618 | * Called when a new child is added to a parent view. |
| 2619 | * |
| 2620 | * @param parent the view in which a child was added |
| 2621 | * @param child the new child view added in the hierarchy |
| 2622 | */ |
| 2623 | void onChildViewAdded(View parent, View child); |
| 2624 | |
| 2625 | /** |
| 2626 | * Called when a child is removed from a parent view. |
| 2627 | * |
| 2628 | * @param parent the view from which the child was removed |
| 2629 | * @param child the child removed from the hierarchy |
| 2630 | */ |
| 2631 | void onChildViewRemoved(View parent, View child); |
| 2632 | } |
| 2633 | |
| 2634 | /** |
| 2635 | * Register a callback to be invoked when a child is added to or removed |
| 2636 | * from this view. |
| 2637 | * |
| 2638 | * @param listener the callback to invoke on hierarchy change |
| 2639 | */ |
| 2640 | public void setOnHierarchyChangeListener(OnHierarchyChangeListener listener) { |
| 2641 | mOnHierarchyChangeListener = listener; |
| 2642 | } |
| 2643 | |
| 2644 | /** |
| 2645 | * Adds a view during layout. This is useful if in your onLayout() method, |
| 2646 | * you need to add more views (as does the list view for example). |
| 2647 | * |
| 2648 | * If index is negative, it means put it at the end of the list. |
| 2649 | * |
| 2650 | * @param child the view to add to the group |
| 2651 | * @param index the index at which the child must be added |
| 2652 | * @param params the layout parameters to associate with the child |
| 2653 | * @return true if the child was added, false otherwise |
| 2654 | */ |
| 2655 | protected boolean addViewInLayout(View child, int index, LayoutParams params) { |
| 2656 | return addViewInLayout(child, index, params, false); |
| 2657 | } |
| 2658 | |
| 2659 | /** |
| 2660 | * Adds a view during layout. This is useful if in your onLayout() method, |
| 2661 | * you need to add more views (as does the list view for example). |
| 2662 | * |
| 2663 | * If index is negative, it means put it at the end of the list. |
| 2664 | * |
| 2665 | * @param child the view to add to the group |
| 2666 | * @param index the index at which the child must be added |
| 2667 | * @param params the layout parameters to associate with the child |
| 2668 | * @param preventRequestLayout if true, calling this method will not trigger a |
| 2669 | * layout request on child |
| 2670 | * @return true if the child was added, false otherwise |
| 2671 | */ |
| 2672 | protected boolean addViewInLayout(View child, int index, LayoutParams params, |
| 2673 | boolean preventRequestLayout) { |
| 2674 | child.mParent = null; |
| 2675 | addViewInner(child, index, params, preventRequestLayout); |
Romain Guy | 24443ea | 2009-05-11 11:56:30 -0700 | [diff] [blame] | 2676 | child.mPrivateFlags = (child.mPrivateFlags & ~DIRTY_MASK) | DRAWN; |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 2677 | return true; |
| 2678 | } |
| 2679 | |
| 2680 | /** |
| 2681 | * Prevents the specified child to be laid out during the next layout pass. |
| 2682 | * |
| 2683 | * @param child the child on which to perform the cleanup |
| 2684 | */ |
| 2685 | protected void cleanupLayoutState(View child) { |
| 2686 | child.mPrivateFlags &= ~View.FORCE_LAYOUT; |
| 2687 | } |
| 2688 | |
| 2689 | private void addViewInner(View child, int index, LayoutParams params, |
| 2690 | boolean preventRequestLayout) { |
| 2691 | |
| 2692 | if (child.getParent() != null) { |
| 2693 | throw new IllegalStateException("The specified child already has a parent. " + |
| 2694 | "You must call removeView() on the child's parent first."); |
| 2695 | } |
| 2696 | |
Chet Haase | 21cd138 | 2010-09-01 17:42:29 -0700 | [diff] [blame] | 2697 | if (mTransition != null) { |
Chet Haase | 5e25c2c | 2010-09-16 11:15:56 -0700 | [diff] [blame] | 2698 | mTransition.addChild(this, child); |
Chet Haase | 21cd138 | 2010-09-01 17:42:29 -0700 | [diff] [blame] | 2699 | } |
| 2700 | |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 2701 | if (!checkLayoutParams(params)) { |
| 2702 | params = generateLayoutParams(params); |
| 2703 | } |
| 2704 | |
| 2705 | if (preventRequestLayout) { |
| 2706 | child.mLayoutParams = params; |
| 2707 | } else { |
| 2708 | child.setLayoutParams(params); |
| 2709 | } |
| 2710 | |
| 2711 | if (index < 0) { |
| 2712 | index = mChildrenCount; |
| 2713 | } |
| 2714 | |
| 2715 | addInArray(child, index); |
| 2716 | |
| 2717 | // tell our children |
| 2718 | if (preventRequestLayout) { |
| 2719 | child.assignParent(this); |
| 2720 | } else { |
| 2721 | child.mParent = this; |
| 2722 | } |
| 2723 | |
| 2724 | if (child.hasFocus()) { |
| 2725 | requestChildFocus(child, child.findFocus()); |
| 2726 | } |
Romain Guy | 8506ab4 | 2009-06-11 17:35:47 -0700 | [diff] [blame] | 2727 | |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 2728 | AttachInfo ai = mAttachInfo; |
| 2729 | if (ai != null) { |
Romain Guy | 8506ab4 | 2009-06-11 17:35:47 -0700 | [diff] [blame] | 2730 | boolean lastKeepOn = ai.mKeepScreenOn; |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 2731 | ai.mKeepScreenOn = false; |
| 2732 | child.dispatchAttachedToWindow(mAttachInfo, (mViewFlags&VISIBILITY_MASK)); |
| 2733 | if (ai.mKeepScreenOn) { |
| 2734 | needGlobalAttributesUpdate(true); |
| 2735 | } |
| 2736 | ai.mKeepScreenOn = lastKeepOn; |
| 2737 | } |
| 2738 | |
| 2739 | if (mOnHierarchyChangeListener != null) { |
| 2740 | mOnHierarchyChangeListener.onChildViewAdded(this, child); |
| 2741 | } |
| 2742 | |
| 2743 | if ((child.mViewFlags & DUPLICATE_PARENT_STATE) == DUPLICATE_PARENT_STATE) { |
| 2744 | mGroupFlags |= FLAG_NOTIFY_CHILDREN_ON_DRAWABLE_STATE_CHANGE; |
| 2745 | } |
| 2746 | } |
| 2747 | |
| 2748 | private void addInArray(View child, int index) { |
| 2749 | View[] children = mChildren; |
| 2750 | final int count = mChildrenCount; |
| 2751 | final int size = children.length; |
| 2752 | if (index == count) { |
| 2753 | if (size == count) { |
| 2754 | mChildren = new View[size + ARRAY_CAPACITY_INCREMENT]; |
| 2755 | System.arraycopy(children, 0, mChildren, 0, size); |
| 2756 | children = mChildren; |
| 2757 | } |
| 2758 | children[mChildrenCount++] = child; |
| 2759 | } else if (index < count) { |
| 2760 | if (size == count) { |
| 2761 | mChildren = new View[size + ARRAY_CAPACITY_INCREMENT]; |
| 2762 | System.arraycopy(children, 0, mChildren, 0, index); |
| 2763 | System.arraycopy(children, index, mChildren, index + 1, count - index); |
| 2764 | children = mChildren; |
| 2765 | } else { |
| 2766 | System.arraycopy(children, index, children, index + 1, count - index); |
| 2767 | } |
| 2768 | children[index] = child; |
| 2769 | mChildrenCount++; |
| 2770 | } else { |
| 2771 | throw new IndexOutOfBoundsException("index=" + index + " count=" + count); |
| 2772 | } |
| 2773 | } |
| 2774 | |
| 2775 | // This method also sets the child's mParent to null |
| 2776 | private void removeFromArray(int index) { |
| 2777 | final View[] children = mChildren; |
Chet Haase | 21cd138 | 2010-09-01 17:42:29 -0700 | [diff] [blame] | 2778 | if (!(mTransitioningViews != null && mTransitioningViews.contains(children[index]))) { |
| 2779 | children[index].mParent = null; |
| 2780 | } |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 2781 | final int count = mChildrenCount; |
| 2782 | if (index == count - 1) { |
| 2783 | children[--mChildrenCount] = null; |
| 2784 | } else if (index >= 0 && index < count) { |
| 2785 | System.arraycopy(children, index + 1, children, index, count - index - 1); |
| 2786 | children[--mChildrenCount] = null; |
| 2787 | } else { |
| 2788 | throw new IndexOutOfBoundsException(); |
| 2789 | } |
| 2790 | } |
| 2791 | |
| 2792 | // This method also sets the children's mParent to null |
| 2793 | private void removeFromArray(int start, int count) { |
| 2794 | final View[] children = mChildren; |
| 2795 | final int childrenCount = mChildrenCount; |
| 2796 | |
| 2797 | start = Math.max(0, start); |
| 2798 | final int end = Math.min(childrenCount, start + count); |
| 2799 | |
| 2800 | if (start == end) { |
| 2801 | return; |
| 2802 | } |
| 2803 | |
| 2804 | if (end == childrenCount) { |
| 2805 | for (int i = start; i < end; i++) { |
| 2806 | children[i].mParent = null; |
| 2807 | children[i] = null; |
| 2808 | } |
| 2809 | } else { |
| 2810 | for (int i = start; i < end; i++) { |
| 2811 | children[i].mParent = null; |
| 2812 | } |
| 2813 | |
| 2814 | // Since we're looping above, we might as well do the copy, but is arraycopy() |
| 2815 | // faster than the extra 2 bounds checks we would do in the loop? |
| 2816 | System.arraycopy(children, end, children, start, childrenCount - end); |
| 2817 | |
| 2818 | for (int i = childrenCount - (end - start); i < childrenCount; i++) { |
| 2819 | children[i] = null; |
| 2820 | } |
| 2821 | } |
| 2822 | |
| 2823 | mChildrenCount -= (end - start); |
| 2824 | } |
| 2825 | |
| 2826 | private void bindLayoutAnimation(View child) { |
| 2827 | Animation a = mLayoutAnimationController.getAnimationForView(child); |
| 2828 | child.setAnimation(a); |
| 2829 | } |
| 2830 | |
| 2831 | /** |
| 2832 | * Subclasses should override this method to set layout animation |
| 2833 | * parameters on the supplied child. |
| 2834 | * |
| 2835 | * @param child the child to associate with animation parameters |
| 2836 | * @param params the child's layout parameters which hold the animation |
| 2837 | * parameters |
| 2838 | * @param index the index of the child in the view group |
| 2839 | * @param count the number of children in the view group |
| 2840 | */ |
| 2841 | protected void attachLayoutAnimationParameters(View child, |
| 2842 | LayoutParams params, int index, int count) { |
| 2843 | LayoutAnimationController.AnimationParameters animationParams = |
| 2844 | params.layoutAnimationParameters; |
| 2845 | if (animationParams == null) { |
| 2846 | animationParams = new LayoutAnimationController.AnimationParameters(); |
| 2847 | params.layoutAnimationParameters = animationParams; |
| 2848 | } |
| 2849 | |
| 2850 | animationParams.count = count; |
| 2851 | animationParams.index = index; |
| 2852 | } |
| 2853 | |
| 2854 | /** |
| 2855 | * {@inheritDoc} |
| 2856 | */ |
| 2857 | public void removeView(View view) { |
| 2858 | removeViewInternal(view); |
| 2859 | requestLayout(); |
| 2860 | invalidate(); |
| 2861 | } |
| 2862 | |
| 2863 | /** |
| 2864 | * Removes a view during layout. This is useful if in your onLayout() method, |
| 2865 | * you need to remove more views. |
| 2866 | * |
| 2867 | * @param view the view to remove from the group |
| 2868 | */ |
| 2869 | public void removeViewInLayout(View view) { |
| 2870 | removeViewInternal(view); |
| 2871 | } |
| 2872 | |
| 2873 | /** |
| 2874 | * Removes a range of views during layout. This is useful if in your onLayout() method, |
| 2875 | * you need to remove more views. |
| 2876 | * |
| 2877 | * @param start the index of the first view to remove from the group |
| 2878 | * @param count the number of views to remove from the group |
| 2879 | */ |
| 2880 | public void removeViewsInLayout(int start, int count) { |
| 2881 | removeViewsInternal(start, count); |
| 2882 | } |
| 2883 | |
| 2884 | /** |
| 2885 | * Removes the view at the specified position in the group. |
| 2886 | * |
| 2887 | * @param index the position in the group of the view to remove |
| 2888 | */ |
| 2889 | public void removeViewAt(int index) { |
| 2890 | removeViewInternal(index, getChildAt(index)); |
| 2891 | requestLayout(); |
| 2892 | invalidate(); |
| 2893 | } |
| 2894 | |
| 2895 | /** |
| 2896 | * Removes the specified range of views from the group. |
| 2897 | * |
| 2898 | * @param start the first position in the group of the range of views to remove |
| 2899 | * @param count the number of views to remove |
| 2900 | */ |
| 2901 | public void removeViews(int start, int count) { |
| 2902 | removeViewsInternal(start, count); |
| 2903 | requestLayout(); |
| 2904 | invalidate(); |
| 2905 | } |
| 2906 | |
| 2907 | private void removeViewInternal(View view) { |
| 2908 | final int index = indexOfChild(view); |
| 2909 | if (index >= 0) { |
| 2910 | removeViewInternal(index, view); |
| 2911 | } |
| 2912 | } |
| 2913 | |
| 2914 | private void removeViewInternal(int index, View view) { |
Chet Haase | 21cd138 | 2010-09-01 17:42:29 -0700 | [diff] [blame] | 2915 | |
| 2916 | if (mTransition != null) { |
Chet Haase | 5e25c2c | 2010-09-16 11:15:56 -0700 | [diff] [blame] | 2917 | mTransition.removeChild(this, view); |
Chet Haase | 21cd138 | 2010-09-01 17:42:29 -0700 | [diff] [blame] | 2918 | } |
| 2919 | |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 2920 | boolean clearChildFocus = false; |
| 2921 | if (view == mFocused) { |
| 2922 | view.clearFocusForRemoval(); |
| 2923 | clearChildFocus = true; |
| 2924 | } |
| 2925 | |
Chet Haase | 21cd138 | 2010-09-01 17:42:29 -0700 | [diff] [blame] | 2926 | if (view.getAnimation() != null || |
| 2927 | (mTransitioningViews != null && mTransitioningViews.contains(view))) { |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 2928 | addDisappearingView(view); |
| 2929 | } else if (view.mAttachInfo != null) { |
| 2930 | view.dispatchDetachedFromWindow(); |
| 2931 | } |
| 2932 | |
| 2933 | if (mOnHierarchyChangeListener != null) { |
| 2934 | mOnHierarchyChangeListener.onChildViewRemoved(this, view); |
| 2935 | } |
| 2936 | |
| 2937 | needGlobalAttributesUpdate(false); |
Romain Guy | 8506ab4 | 2009-06-11 17:35:47 -0700 | [diff] [blame] | 2938 | |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 2939 | removeFromArray(index); |
| 2940 | |
| 2941 | if (clearChildFocus) { |
| 2942 | clearChildFocus(view); |
| 2943 | } |
| 2944 | } |
| 2945 | |
Chet Haase | 21cd138 | 2010-09-01 17:42:29 -0700 | [diff] [blame] | 2946 | /** |
| 2947 | * Sets the LayoutTransition object for this ViewGroup. If the LayoutTransition object is |
| 2948 | * not null, changes in layout which occur because of children being added to or removed from |
| 2949 | * the ViewGroup will be animated according to the animations defined in that LayoutTransition |
| 2950 | * object. By default, the transition object is null (so layout changes are not animated). |
| 2951 | * |
| 2952 | * @param transition The LayoutTransition object that will animated changes in layout. A value |
| 2953 | * of <code>null</code> means no transition will run on layout changes. |
Chet Haase | 13cc120 | 2010-09-03 15:39:20 -0700 | [diff] [blame] | 2954 | * @attr ref android.R.styleable#ViewGroup_animateLayoutChanges |
Chet Haase | 21cd138 | 2010-09-01 17:42:29 -0700 | [diff] [blame] | 2955 | */ |
| 2956 | public void setLayoutTransition(LayoutTransition transition) { |
Chet Haase | b20db3e | 2010-09-10 13:07:30 -0700 | [diff] [blame] | 2957 | if (mTransition != null) { |
| 2958 | mTransition.removeTransitionListener(mLayoutTransitionListener); |
| 2959 | } |
Chet Haase | 21cd138 | 2010-09-01 17:42:29 -0700 | [diff] [blame] | 2960 | mTransition = transition; |
Chet Haase | 13cc120 | 2010-09-03 15:39:20 -0700 | [diff] [blame] | 2961 | if (mTransition != null) { |
| 2962 | mTransition.addTransitionListener(mLayoutTransitionListener); |
| 2963 | } |
| 2964 | } |
| 2965 | |
| 2966 | /** |
| 2967 | * Gets the LayoutTransition object for this ViewGroup. If the LayoutTransition object is |
| 2968 | * not null, changes in layout which occur because of children being added to or removed from |
| 2969 | * the ViewGroup will be animated according to the animations defined in that LayoutTransition |
| 2970 | * object. By default, the transition object is null (so layout changes are not animated). |
| 2971 | * |
| 2972 | * @return LayoutTranstion The LayoutTransition object that will animated changes in layout. |
| 2973 | * A value of <code>null</code> means no transition will run on layout changes. |
| 2974 | */ |
| 2975 | public LayoutTransition getLayoutTransition() { |
| 2976 | return mTransition; |
Chet Haase | 21cd138 | 2010-09-01 17:42:29 -0700 | [diff] [blame] | 2977 | } |
| 2978 | |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 2979 | private void removeViewsInternal(int start, int count) { |
| 2980 | final OnHierarchyChangeListener onHierarchyChangeListener = mOnHierarchyChangeListener; |
| 2981 | final boolean notifyListener = onHierarchyChangeListener != null; |
| 2982 | final View focused = mFocused; |
| 2983 | final boolean detach = mAttachInfo != null; |
| 2984 | View clearChildFocus = null; |
| 2985 | |
| 2986 | final View[] children = mChildren; |
| 2987 | final int end = start + count; |
| 2988 | |
| 2989 | for (int i = start; i < end; i++) { |
| 2990 | final View view = children[i]; |
| 2991 | |
Chet Haase | 21cd138 | 2010-09-01 17:42:29 -0700 | [diff] [blame] | 2992 | if (mTransition != null) { |
Chet Haase | 5e25c2c | 2010-09-16 11:15:56 -0700 | [diff] [blame] | 2993 | mTransition.removeChild(this, view); |
Chet Haase | 21cd138 | 2010-09-01 17:42:29 -0700 | [diff] [blame] | 2994 | } |
| 2995 | |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 2996 | if (view == focused) { |
| 2997 | view.clearFocusForRemoval(); |
| 2998 | clearChildFocus = view; |
| 2999 | } |
| 3000 | |
Chet Haase | 21cd138 | 2010-09-01 17:42:29 -0700 | [diff] [blame] | 3001 | if (view.getAnimation() != null || |
| 3002 | (mTransitioningViews != null && mTransitioningViews.contains(view))) { |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 3003 | addDisappearingView(view); |
| 3004 | } else if (detach) { |
| 3005 | view.dispatchDetachedFromWindow(); |
| 3006 | } |
| 3007 | |
| 3008 | needGlobalAttributesUpdate(false); |
Romain Guy | 8506ab4 | 2009-06-11 17:35:47 -0700 | [diff] [blame] | 3009 | |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 3010 | if (notifyListener) { |
| 3011 | onHierarchyChangeListener.onChildViewRemoved(this, view); |
| 3012 | } |
| 3013 | } |
| 3014 | |
| 3015 | removeFromArray(start, count); |
| 3016 | |
| 3017 | if (clearChildFocus != null) { |
| 3018 | clearChildFocus(clearChildFocus); |
| 3019 | } |
| 3020 | } |
| 3021 | |
| 3022 | /** |
| 3023 | * Call this method to remove all child views from the |
| 3024 | * ViewGroup. |
| 3025 | */ |
| 3026 | public void removeAllViews() { |
| 3027 | removeAllViewsInLayout(); |
| 3028 | requestLayout(); |
| 3029 | invalidate(); |
| 3030 | } |
| 3031 | |
| 3032 | /** |
| 3033 | * Called by a ViewGroup subclass to remove child views from itself, |
| 3034 | * when it must first know its size on screen before it can calculate how many |
| 3035 | * child views it will render. An example is a Gallery or a ListView, which |
| 3036 | * may "have" 50 children, but actually only render the number of children |
| 3037 | * that can currently fit inside the object on screen. Do not call |
| 3038 | * this method unless you are extending ViewGroup and understand the |
| 3039 | * view measuring and layout pipeline. |
| 3040 | */ |
| 3041 | public void removeAllViewsInLayout() { |
| 3042 | final int count = mChildrenCount; |
| 3043 | if (count <= 0) { |
| 3044 | return; |
| 3045 | } |
| 3046 | |
| 3047 | final View[] children = mChildren; |
| 3048 | mChildrenCount = 0; |
| 3049 | |
| 3050 | final OnHierarchyChangeListener listener = mOnHierarchyChangeListener; |
| 3051 | final boolean notify = listener != null; |
| 3052 | final View focused = mFocused; |
| 3053 | final boolean detach = mAttachInfo != null; |
| 3054 | View clearChildFocus = null; |
| 3055 | |
| 3056 | needGlobalAttributesUpdate(false); |
Romain Guy | 8506ab4 | 2009-06-11 17:35:47 -0700 | [diff] [blame] | 3057 | |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 3058 | for (int i = count - 1; i >= 0; i--) { |
| 3059 | final View view = children[i]; |
| 3060 | |
Chet Haase | 21cd138 | 2010-09-01 17:42:29 -0700 | [diff] [blame] | 3061 | if (mTransition != null) { |
Chet Haase | 5e25c2c | 2010-09-16 11:15:56 -0700 | [diff] [blame] | 3062 | mTransition.removeChild(this, view); |
Chet Haase | 21cd138 | 2010-09-01 17:42:29 -0700 | [diff] [blame] | 3063 | } |
| 3064 | |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 3065 | if (view == focused) { |
| 3066 | view.clearFocusForRemoval(); |
| 3067 | clearChildFocus = view; |
| 3068 | } |
| 3069 | |
Chet Haase | 21cd138 | 2010-09-01 17:42:29 -0700 | [diff] [blame] | 3070 | if (view.getAnimation() != null || |
| 3071 | (mTransitioningViews != null && mTransitioningViews.contains(view))) { |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 3072 | addDisappearingView(view); |
| 3073 | } else if (detach) { |
| 3074 | view.dispatchDetachedFromWindow(); |
| 3075 | } |
| 3076 | |
| 3077 | if (notify) { |
| 3078 | listener.onChildViewRemoved(this, view); |
| 3079 | } |
| 3080 | |
| 3081 | view.mParent = null; |
| 3082 | children[i] = null; |
| 3083 | } |
| 3084 | |
| 3085 | if (clearChildFocus != null) { |
| 3086 | clearChildFocus(clearChildFocus); |
| 3087 | } |
| 3088 | } |
| 3089 | |
| 3090 | /** |
| 3091 | * Finishes the removal of a detached view. This method will dispatch the detached from |
| 3092 | * window event and notify the hierarchy change listener. |
| 3093 | * |
| 3094 | * @param child the child to be definitely removed from the view hierarchy |
| 3095 | * @param animate if true and the view has an animation, the view is placed in the |
| 3096 | * disappearing views list, otherwise, it is detached from the window |
| 3097 | * |
| 3098 | * @see #attachViewToParent(View, int, android.view.ViewGroup.LayoutParams) |
| 3099 | * @see #detachAllViewsFromParent() |
| 3100 | * @see #detachViewFromParent(View) |
| 3101 | * @see #detachViewFromParent(int) |
| 3102 | */ |
| 3103 | protected void removeDetachedView(View child, boolean animate) { |
Chet Haase | 21cd138 | 2010-09-01 17:42:29 -0700 | [diff] [blame] | 3104 | if (mTransition != null) { |
Chet Haase | 5e25c2c | 2010-09-16 11:15:56 -0700 | [diff] [blame] | 3105 | mTransition.removeChild(this, child); |
Chet Haase | 21cd138 | 2010-09-01 17:42:29 -0700 | [diff] [blame] | 3106 | } |
| 3107 | |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 3108 | if (child == mFocused) { |
| 3109 | child.clearFocus(); |
| 3110 | } |
Romain Guy | 8506ab4 | 2009-06-11 17:35:47 -0700 | [diff] [blame] | 3111 | |
Chet Haase | 21cd138 | 2010-09-01 17:42:29 -0700 | [diff] [blame] | 3112 | if ((animate && child.getAnimation() != null) || |
| 3113 | (mTransitioningViews != null && mTransitioningViews.contains(child))) { |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 3114 | addDisappearingView(child); |
| 3115 | } else if (child.mAttachInfo != null) { |
| 3116 | child.dispatchDetachedFromWindow(); |
| 3117 | } |
| 3118 | |
| 3119 | if (mOnHierarchyChangeListener != null) { |
| 3120 | mOnHierarchyChangeListener.onChildViewRemoved(this, child); |
| 3121 | } |
| 3122 | } |
| 3123 | |
| 3124 | /** |
| 3125 | * Attaches a view to this view group. Attaching a view assigns this group as the parent, |
| 3126 | * sets the layout parameters and puts the view in the list of children so it can be retrieved |
| 3127 | * by calling {@link #getChildAt(int)}. |
| 3128 | * |
| 3129 | * This method should be called only for view which were detached from their parent. |
| 3130 | * |
| 3131 | * @param child the child to attach |
| 3132 | * @param index the index at which the child should be attached |
| 3133 | * @param params the layout parameters of the child |
| 3134 | * |
| 3135 | * @see #removeDetachedView(View, boolean) |
| 3136 | * @see #detachAllViewsFromParent() |
| 3137 | * @see #detachViewFromParent(View) |
| 3138 | * @see #detachViewFromParent(int) |
| 3139 | */ |
| 3140 | protected void attachViewToParent(View child, int index, LayoutParams params) { |
| 3141 | child.mLayoutParams = params; |
| 3142 | |
| 3143 | if (index < 0) { |
| 3144 | index = mChildrenCount; |
| 3145 | } |
| 3146 | |
| 3147 | addInArray(child, index); |
| 3148 | |
| 3149 | child.mParent = this; |
Romain Guy | bc9fdc9 | 2010-01-19 13:27:48 -0800 | [diff] [blame] | 3150 | child.mPrivateFlags = (child.mPrivateFlags & ~DIRTY_MASK & ~DRAWING_CACHE_VALID) | DRAWN; |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 3151 | |
| 3152 | if (child.hasFocus()) { |
| 3153 | requestChildFocus(child, child.findFocus()); |
| 3154 | } |
| 3155 | } |
| 3156 | |
| 3157 | /** |
| 3158 | * Detaches a view from its parent. Detaching a view should be temporary and followed |
| 3159 | * either by a call to {@link #attachViewToParent(View, int, android.view.ViewGroup.LayoutParams)} |
| 3160 | * or a call to {@link #removeDetachedView(View, boolean)}. When a view is detached, |
| 3161 | * its parent is null and cannot be retrieved by a call to {@link #getChildAt(int)}. |
| 3162 | * |
| 3163 | * @param child the child to detach |
| 3164 | * |
| 3165 | * @see #detachViewFromParent(int) |
| 3166 | * @see #detachViewsFromParent(int, int) |
| 3167 | * @see #detachAllViewsFromParent() |
| 3168 | * @see #attachViewToParent(View, int, android.view.ViewGroup.LayoutParams) |
| 3169 | * @see #removeDetachedView(View, boolean) |
| 3170 | */ |
| 3171 | protected void detachViewFromParent(View child) { |
| 3172 | removeFromArray(indexOfChild(child)); |
| 3173 | } |
| 3174 | |
| 3175 | /** |
| 3176 | * Detaches a view from its parent. Detaching a view should be temporary and followed |
| 3177 | * either by a call to {@link #attachViewToParent(View, int, android.view.ViewGroup.LayoutParams)} |
| 3178 | * or a call to {@link #removeDetachedView(View, boolean)}. When a view is detached, |
| 3179 | * its parent is null and cannot be retrieved by a call to {@link #getChildAt(int)}. |
| 3180 | * |
| 3181 | * @param index the index of the child to detach |
| 3182 | * |
| 3183 | * @see #detachViewFromParent(View) |
| 3184 | * @see #detachAllViewsFromParent() |
| 3185 | * @see #detachViewsFromParent(int, int) |
| 3186 | * @see #attachViewToParent(View, int, android.view.ViewGroup.LayoutParams) |
| 3187 | * @see #removeDetachedView(View, boolean) |
| 3188 | */ |
| 3189 | protected void detachViewFromParent(int index) { |
| 3190 | removeFromArray(index); |
| 3191 | } |
| 3192 | |
| 3193 | /** |
| 3194 | * Detaches a range of view from their parent. Detaching a view should be temporary and followed |
| 3195 | * either by a call to {@link #attachViewToParent(View, int, android.view.ViewGroup.LayoutParams)} |
| 3196 | * or a call to {@link #removeDetachedView(View, boolean)}. When a view is detached, its |
| 3197 | * parent is null and cannot be retrieved by a call to {@link #getChildAt(int)}. |
| 3198 | * |
| 3199 | * @param start the first index of the childrend range to detach |
| 3200 | * @param count the number of children to detach |
| 3201 | * |
| 3202 | * @see #detachViewFromParent(View) |
| 3203 | * @see #detachViewFromParent(int) |
| 3204 | * @see #detachAllViewsFromParent() |
| 3205 | * @see #attachViewToParent(View, int, android.view.ViewGroup.LayoutParams) |
| 3206 | * @see #removeDetachedView(View, boolean) |
| 3207 | */ |
| 3208 | protected void detachViewsFromParent(int start, int count) { |
| 3209 | removeFromArray(start, count); |
| 3210 | } |
| 3211 | |
| 3212 | /** |
| 3213 | * Detaches all views from the parent. Detaching a view should be temporary and followed |
| 3214 | * either by a call to {@link #attachViewToParent(View, int, android.view.ViewGroup.LayoutParams)} |
| 3215 | * or a call to {@link #removeDetachedView(View, boolean)}. When a view is detached, |
| 3216 | * its parent is null and cannot be retrieved by a call to {@link #getChildAt(int)}. |
| 3217 | * |
| 3218 | * @see #detachViewFromParent(View) |
| 3219 | * @see #detachViewFromParent(int) |
| 3220 | * @see #detachViewsFromParent(int, int) |
| 3221 | * @see #attachViewToParent(View, int, android.view.ViewGroup.LayoutParams) |
| 3222 | * @see #removeDetachedView(View, boolean) |
| 3223 | */ |
| 3224 | protected void detachAllViewsFromParent() { |
| 3225 | final int count = mChildrenCount; |
| 3226 | if (count <= 0) { |
| 3227 | return; |
| 3228 | } |
| 3229 | |
| 3230 | final View[] children = mChildren; |
| 3231 | mChildrenCount = 0; |
| 3232 | |
| 3233 | for (int i = count - 1; i >= 0; i--) { |
| 3234 | children[i].mParent = null; |
| 3235 | children[i] = null; |
| 3236 | } |
| 3237 | } |
| 3238 | |
| 3239 | /** |
| 3240 | * Don't call or override this method. It is used for the implementation of |
| 3241 | * the view hierarchy. |
| 3242 | */ |
| 3243 | public final void invalidateChild(View child, final Rect dirty) { |
| 3244 | if (ViewDebug.TRACE_HIERARCHY) { |
| 3245 | ViewDebug.trace(this, ViewDebug.HierarchyTraceType.INVALIDATE_CHILD); |
| 3246 | } |
| 3247 | |
| 3248 | ViewParent parent = this; |
| 3249 | |
| 3250 | final AttachInfo attachInfo = mAttachInfo; |
| 3251 | if (attachInfo != null) { |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 3252 | // If the child is drawing an animation, we want to copy this flag onto |
| 3253 | // ourselves and the parent to make sure the invalidate request goes |
| 3254 | // through |
| 3255 | final boolean drawAnimation = (child.mPrivateFlags & DRAW_ANIMATION) == DRAW_ANIMATION; |
Romain Guy | 24443ea | 2009-05-11 11:56:30 -0700 | [diff] [blame] | 3256 | |
| 3257 | // Check whether the child that requests the invalidate is fully opaque |
Romain Guy | ec25df9 | 2009-05-25 04:39:37 -0700 | [diff] [blame] | 3258 | final boolean isOpaque = child.isOpaque() && !drawAnimation && |
Chet Haase | 70d4ba1 | 2010-10-06 09:46:45 -0700 | [diff] [blame] | 3259 | child.getAnimation() == null; |
Romain Guy | 24443ea | 2009-05-11 11:56:30 -0700 | [diff] [blame] | 3260 | // Mark the child as dirty, using the appropriate flag |
| 3261 | // Make sure we do not set both flags at the same time |
| 3262 | final int opaqueFlag = isOpaque ? DIRTY_OPAQUE : DIRTY; |
| 3263 | |
Chet Haase | 70d4ba1 | 2010-10-06 09:46:45 -0700 | [diff] [blame] | 3264 | if (dirty == null) { |
| 3265 | do { |
| 3266 | View view = null; |
| 3267 | if (parent instanceof View) { |
| 3268 | view = (View) parent; |
| 3269 | if ((view.mPrivateFlags & DIRTY_MASK) != 0) { |
| 3270 | // already marked dirty - we're done |
| 3271 | break; |
| 3272 | } |
| 3273 | } |
| 3274 | |
| 3275 | if (drawAnimation) { |
| 3276 | if (view != null) { |
| 3277 | view.mPrivateFlags |= DRAW_ANIMATION; |
| 3278 | } else if (parent instanceof ViewRoot) { |
| 3279 | ((ViewRoot) parent).mIsAnimating = true; |
| 3280 | } |
| 3281 | } |
| 3282 | |
| 3283 | if (parent instanceof ViewRoot) { |
| 3284 | ((ViewRoot) parent).invalidate(); |
| 3285 | parent = null; |
| 3286 | } else if (view != null) { |
| 3287 | if ((mPrivateFlags & DRAWN) == DRAWN) { |
| 3288 | view.mPrivateFlags &= ~DRAWING_CACHE_VALID; |
| 3289 | if (view != null && (view.mPrivateFlags & DIRTY_MASK) != DIRTY) { |
| 3290 | view.mPrivateFlags = |
| 3291 | (view.mPrivateFlags & ~DIRTY_MASK) | opaqueFlag; |
| 3292 | } |
| 3293 | parent = view.mParent; |
| 3294 | } else { |
| 3295 | parent = null; |
| 3296 | } |
| 3297 | } |
| 3298 | } while (parent != null); |
| 3299 | } else { |
| 3300 | final int[] location = attachInfo.mInvalidateChildLocation; |
| 3301 | location[CHILD_LEFT_INDEX] = child.mLeft; |
| 3302 | location[CHILD_TOP_INDEX] = child.mTop; |
| 3303 | Matrix childMatrix = child.getMatrix(); |
| 3304 | if (!childMatrix.isIdentity()) { |
| 3305 | RectF boundingRect = attachInfo.mTmpTransformRect; |
| 3306 | boundingRect.set(dirty); |
| 3307 | childMatrix.mapRect(boundingRect); |
| 3308 | dirty.set((int) boundingRect.left, (int) boundingRect.top, |
| 3309 | (int) (boundingRect.right + 0.5f), |
| 3310 | (int) (boundingRect.bottom + 0.5f)); |
Romain Guy | 24443ea | 2009-05-11 11:56:30 -0700 | [diff] [blame] | 3311 | } |
| 3312 | |
Chet Haase | 70d4ba1 | 2010-10-06 09:46:45 -0700 | [diff] [blame] | 3313 | do { |
| 3314 | View view = null; |
| 3315 | if (parent instanceof View) { |
| 3316 | view = (View) parent; |
| 3317 | } |
| 3318 | |
| 3319 | if (drawAnimation) { |
| 3320 | if (view != null) { |
| 3321 | view.mPrivateFlags |= DRAW_ANIMATION; |
| 3322 | } else if (parent instanceof ViewRoot) { |
| 3323 | ((ViewRoot) parent).mIsAnimating = true; |
| 3324 | } |
| 3325 | } |
| 3326 | |
| 3327 | // If the parent is dirty opaque or not dirty, mark it dirty with the opaque |
| 3328 | // flag coming from the child that initiated the invalidate |
| 3329 | if (view != null && (view.mPrivateFlags & DIRTY_MASK) != DIRTY) { |
| 3330 | view.mPrivateFlags = (view.mPrivateFlags & ~DIRTY_MASK) | opaqueFlag; |
| 3331 | } |
| 3332 | |
| 3333 | parent = parent.invalidateChildInParent(location, dirty); |
Romain Guy | 24443ea | 2009-05-11 11:56:30 -0700 | [diff] [blame] | 3334 | if (view != null) { |
Chet Haase | 70d4ba1 | 2010-10-06 09:46:45 -0700 | [diff] [blame] | 3335 | // Account for transform on current parent |
| 3336 | Matrix m = view.getMatrix(); |
| 3337 | if (!m.isIdentity()) { |
| 3338 | RectF boundingRect = attachInfo.mTmpTransformRect; |
| 3339 | boundingRect.set(dirty); |
| 3340 | m.mapRect(boundingRect); |
| 3341 | dirty.set((int) boundingRect.left, (int) boundingRect.top, |
| 3342 | (int) (boundingRect.right + 0.5f), |
| 3343 | (int) (boundingRect.bottom + 0.5f)); |
| 3344 | } |
Romain Guy | bb93d55 | 2009-03-24 21:04:15 -0700 | [diff] [blame] | 3345 | } |
Chet Haase | 70d4ba1 | 2010-10-06 09:46:45 -0700 | [diff] [blame] | 3346 | } while (parent != null); |
| 3347 | } |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 3348 | } |
| 3349 | } |
| 3350 | |
| 3351 | /** |
| 3352 | * Don't call or override this method. It is used for the implementation of |
| 3353 | * the view hierarchy. |
| 3354 | * |
| 3355 | * This implementation returns null if this ViewGroup does not have a parent, |
| 3356 | * if this ViewGroup is already fully invalidated or if the dirty rectangle |
| 3357 | * does not intersect with this ViewGroup's bounds. |
| 3358 | */ |
| 3359 | public ViewParent invalidateChildInParent(final int[] location, final Rect dirty) { |
| 3360 | if (ViewDebug.TRACE_HIERARCHY) { |
| 3361 | ViewDebug.trace(this, ViewDebug.HierarchyTraceType.INVALIDATE_CHILD_IN_PARENT); |
| 3362 | } |
| 3363 | |
| 3364 | if ((mPrivateFlags & DRAWN) == DRAWN) { |
| 3365 | if ((mGroupFlags & (FLAG_OPTIMIZE_INVALIDATE | FLAG_ANIMATION_DONE)) != |
| 3366 | FLAG_OPTIMIZE_INVALIDATE) { |
| 3367 | dirty.offset(location[CHILD_LEFT_INDEX] - mScrollX, |
| 3368 | location[CHILD_TOP_INDEX] - mScrollY); |
| 3369 | |
| 3370 | final int left = mLeft; |
| 3371 | final int top = mTop; |
| 3372 | |
Adam Powell | 879fb6b | 2010-09-20 11:23:56 -0700 | [diff] [blame] | 3373 | if (dirty.intersect(0, 0, mRight - left, mBottom - top) || |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 3374 | (mPrivateFlags & DRAW_ANIMATION) == DRAW_ANIMATION) { |
| 3375 | mPrivateFlags &= ~DRAWING_CACHE_VALID; |
| 3376 | |
| 3377 | location[CHILD_LEFT_INDEX] = left; |
| 3378 | location[CHILD_TOP_INDEX] = top; |
| 3379 | |
| 3380 | return mParent; |
| 3381 | } |
| 3382 | } else { |
| 3383 | mPrivateFlags &= ~DRAWN & ~DRAWING_CACHE_VALID; |
| 3384 | |
| 3385 | location[CHILD_LEFT_INDEX] = mLeft; |
| 3386 | location[CHILD_TOP_INDEX] = mTop; |
| 3387 | |
| 3388 | dirty.set(0, 0, mRight - location[CHILD_LEFT_INDEX], |
| 3389 | mBottom - location[CHILD_TOP_INDEX]); |
| 3390 | |
| 3391 | return mParent; |
| 3392 | } |
| 3393 | } |
| 3394 | |
| 3395 | return null; |
| 3396 | } |
| 3397 | |
| 3398 | /** |
| 3399 | * Offset a rectangle that is in a descendant's coordinate |
| 3400 | * space into our coordinate space. |
| 3401 | * @param descendant A descendant of this view |
| 3402 | * @param rect A rectangle defined in descendant's coordinate space. |
| 3403 | */ |
| 3404 | public final void offsetDescendantRectToMyCoords(View descendant, Rect rect) { |
| 3405 | offsetRectBetweenParentAndChild(descendant, rect, true, false); |
| 3406 | } |
| 3407 | |
| 3408 | /** |
| 3409 | * Offset a rectangle that is in our coordinate space into an ancestor's |
| 3410 | * coordinate space. |
| 3411 | * @param descendant A descendant of this view |
| 3412 | * @param rect A rectangle defined in descendant's coordinate space. |
| 3413 | */ |
| 3414 | public final void offsetRectIntoDescendantCoords(View descendant, Rect rect) { |
| 3415 | offsetRectBetweenParentAndChild(descendant, rect, false, false); |
| 3416 | } |
| 3417 | |
| 3418 | /** |
| 3419 | * Helper method that offsets a rect either from parent to descendant or |
| 3420 | * descendant to parent. |
| 3421 | */ |
| 3422 | void offsetRectBetweenParentAndChild(View descendant, Rect rect, |
| 3423 | boolean offsetFromChildToParent, boolean clipToBounds) { |
| 3424 | |
| 3425 | // already in the same coord system :) |
| 3426 | if (descendant == this) { |
| 3427 | return; |
| 3428 | } |
| 3429 | |
| 3430 | ViewParent theParent = descendant.mParent; |
| 3431 | |
| 3432 | // search and offset up to the parent |
| 3433 | while ((theParent != null) |
| 3434 | && (theParent instanceof View) |
| 3435 | && (theParent != this)) { |
| 3436 | |
| 3437 | if (offsetFromChildToParent) { |
| 3438 | rect.offset(descendant.mLeft - descendant.mScrollX, |
| 3439 | descendant.mTop - descendant.mScrollY); |
| 3440 | if (clipToBounds) { |
| 3441 | View p = (View) theParent; |
| 3442 | rect.intersect(0, 0, p.mRight - p.mLeft, p.mBottom - p.mTop); |
| 3443 | } |
| 3444 | } else { |
| 3445 | if (clipToBounds) { |
| 3446 | View p = (View) theParent; |
| 3447 | rect.intersect(0, 0, p.mRight - p.mLeft, p.mBottom - p.mTop); |
| 3448 | } |
| 3449 | rect.offset(descendant.mScrollX - descendant.mLeft, |
| 3450 | descendant.mScrollY - descendant.mTop); |
| 3451 | } |
| 3452 | |
| 3453 | descendant = (View) theParent; |
| 3454 | theParent = descendant.mParent; |
| 3455 | } |
| 3456 | |
| 3457 | // now that we are up to this view, need to offset one more time |
| 3458 | // to get into our coordinate space |
| 3459 | if (theParent == this) { |
| 3460 | if (offsetFromChildToParent) { |
| 3461 | rect.offset(descendant.mLeft - descendant.mScrollX, |
| 3462 | descendant.mTop - descendant.mScrollY); |
| 3463 | } else { |
| 3464 | rect.offset(descendant.mScrollX - descendant.mLeft, |
| 3465 | descendant.mScrollY - descendant.mTop); |
| 3466 | } |
| 3467 | } else { |
| 3468 | throw new IllegalArgumentException("parameter must be a descendant of this view"); |
| 3469 | } |
| 3470 | } |
| 3471 | |
| 3472 | /** |
| 3473 | * Offset the vertical location of all children of this view by the specified number of pixels. |
| 3474 | * |
| 3475 | * @param offset the number of pixels to offset |
| 3476 | * |
| 3477 | * @hide |
| 3478 | */ |
| 3479 | public void offsetChildrenTopAndBottom(int offset) { |
| 3480 | final int count = mChildrenCount; |
| 3481 | final View[] children = mChildren; |
| 3482 | |
| 3483 | for (int i = 0; i < count; i++) { |
| 3484 | final View v = children[i]; |
| 3485 | v.mTop += offset; |
| 3486 | v.mBottom += offset; |
| 3487 | } |
| 3488 | } |
| 3489 | |
| 3490 | /** |
| 3491 | * {@inheritDoc} |
| 3492 | */ |
| 3493 | public boolean getChildVisibleRect(View child, Rect r, android.graphics.Point offset) { |
| 3494 | int dx = child.mLeft - mScrollX; |
| 3495 | int dy = child.mTop - mScrollY; |
| 3496 | if (offset != null) { |
| 3497 | offset.x += dx; |
| 3498 | offset.y += dy; |
| 3499 | } |
| 3500 | r.offset(dx, dy); |
| 3501 | return r.intersect(0, 0, mRight - mLeft, mBottom - mTop) && |
| 3502 | (mParent == null || mParent.getChildVisibleRect(this, r, offset)); |
| 3503 | } |
| 3504 | |
| 3505 | /** |
| 3506 | * {@inheritDoc} |
| 3507 | */ |
| 3508 | @Override |
| 3509 | protected abstract void onLayout(boolean changed, |
| 3510 | int l, int t, int r, int b); |
| 3511 | |
| 3512 | /** |
| 3513 | * Indicates whether the view group has the ability to animate its children |
| 3514 | * after the first layout. |
| 3515 | * |
| 3516 | * @return true if the children can be animated, false otherwise |
| 3517 | */ |
| 3518 | protected boolean canAnimate() { |
| 3519 | return mLayoutAnimationController != null; |
| 3520 | } |
| 3521 | |
| 3522 | /** |
| 3523 | * Runs the layout animation. Calling this method triggers a relayout of |
| 3524 | * this view group. |
| 3525 | */ |
| 3526 | public void startLayoutAnimation() { |
| 3527 | if (mLayoutAnimationController != null) { |
| 3528 | mGroupFlags |= FLAG_RUN_ANIMATION; |
| 3529 | requestLayout(); |
| 3530 | } |
| 3531 | } |
| 3532 | |
| 3533 | /** |
| 3534 | * Schedules the layout animation to be played after the next layout pass |
| 3535 | * of this view group. This can be used to restart the layout animation |
| 3536 | * when the content of the view group changes or when the activity is |
| 3537 | * paused and resumed. |
| 3538 | */ |
| 3539 | public void scheduleLayoutAnimation() { |
| 3540 | mGroupFlags |= FLAG_RUN_ANIMATION; |
| 3541 | } |
| 3542 | |
| 3543 | /** |
| 3544 | * Sets the layout animation controller used to animate the group's |
| 3545 | * children after the first layout. |
| 3546 | * |
| 3547 | * @param controller the animation controller |
| 3548 | */ |
| 3549 | public void setLayoutAnimation(LayoutAnimationController controller) { |
| 3550 | mLayoutAnimationController = controller; |
| 3551 | if (mLayoutAnimationController != null) { |
| 3552 | mGroupFlags |= FLAG_RUN_ANIMATION; |
| 3553 | } |
| 3554 | } |
| 3555 | |
| 3556 | /** |
| 3557 | * Returns the layout animation controller used to animate the group's |
| 3558 | * children. |
| 3559 | * |
| 3560 | * @return the current animation controller |
| 3561 | */ |
| 3562 | public LayoutAnimationController getLayoutAnimation() { |
| 3563 | return mLayoutAnimationController; |
| 3564 | } |
| 3565 | |
| 3566 | /** |
| 3567 | * Indicates whether the children's drawing cache is used during a layout |
| 3568 | * animation. By default, the drawing cache is enabled but this will prevent |
| 3569 | * nested layout animations from working. To nest animations, you must disable |
| 3570 | * the cache. |
| 3571 | * |
| 3572 | * @return true if the animation cache is enabled, false otherwise |
| 3573 | * |
| 3574 | * @see #setAnimationCacheEnabled(boolean) |
| 3575 | * @see View#setDrawingCacheEnabled(boolean) |
| 3576 | */ |
| 3577 | @ViewDebug.ExportedProperty |
| 3578 | public boolean isAnimationCacheEnabled() { |
| 3579 | return (mGroupFlags & FLAG_ANIMATION_CACHE) == FLAG_ANIMATION_CACHE; |
| 3580 | } |
| 3581 | |
| 3582 | /** |
| 3583 | * Enables or disables the children's drawing cache during a layout animation. |
| 3584 | * By default, the drawing cache is enabled but this will prevent nested |
| 3585 | * layout animations from working. To nest animations, you must disable the |
| 3586 | * cache. |
| 3587 | * |
| 3588 | * @param enabled true to enable the animation cache, false otherwise |
| 3589 | * |
| 3590 | * @see #isAnimationCacheEnabled() |
| 3591 | * @see View#setDrawingCacheEnabled(boolean) |
| 3592 | */ |
| 3593 | public void setAnimationCacheEnabled(boolean enabled) { |
| 3594 | setBooleanFlag(FLAG_ANIMATION_CACHE, enabled); |
| 3595 | } |
| 3596 | |
| 3597 | /** |
| 3598 | * Indicates whether this ViewGroup will always try to draw its children using their |
| 3599 | * drawing cache. By default this property is enabled. |
| 3600 | * |
| 3601 | * @return true if the animation cache is enabled, false otherwise |
| 3602 | * |
| 3603 | * @see #setAlwaysDrawnWithCacheEnabled(boolean) |
| 3604 | * @see #setChildrenDrawnWithCacheEnabled(boolean) |
| 3605 | * @see View#setDrawingCacheEnabled(boolean) |
| 3606 | */ |
Konstantin Lopyrev | bea9516 | 2010-08-10 17:02:18 -0700 | [diff] [blame] | 3607 | @ViewDebug.ExportedProperty(category = "drawing") |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 3608 | public boolean isAlwaysDrawnWithCacheEnabled() { |
| 3609 | return (mGroupFlags & FLAG_ALWAYS_DRAWN_WITH_CACHE) == FLAG_ALWAYS_DRAWN_WITH_CACHE; |
| 3610 | } |
| 3611 | |
| 3612 | /** |
| 3613 | * Indicates whether this ViewGroup will always try to draw its children using their |
| 3614 | * drawing cache. This property can be set to true when the cache rendering is |
| 3615 | * slightly different from the children's normal rendering. Renderings can be different, |
| 3616 | * for instance, when the cache's quality is set to low. |
| 3617 | * |
| 3618 | * When this property is disabled, the ViewGroup will use the drawing cache of its |
| 3619 | * children only when asked to. It's usually the task of subclasses to tell ViewGroup |
| 3620 | * when to start using the drawing cache and when to stop using it. |
| 3621 | * |
| 3622 | * @param always true to always draw with the drawing cache, false otherwise |
| 3623 | * |
| 3624 | * @see #isAlwaysDrawnWithCacheEnabled() |
| 3625 | * @see #setChildrenDrawnWithCacheEnabled(boolean) |
| 3626 | * @see View#setDrawingCacheEnabled(boolean) |
| 3627 | * @see View#setDrawingCacheQuality(int) |
| 3628 | */ |
| 3629 | public void setAlwaysDrawnWithCacheEnabled(boolean always) { |
| 3630 | setBooleanFlag(FLAG_ALWAYS_DRAWN_WITH_CACHE, always); |
| 3631 | } |
| 3632 | |
| 3633 | /** |
| 3634 | * Indicates whether the ViewGroup is currently drawing its children using |
| 3635 | * their drawing cache. |
| 3636 | * |
| 3637 | * @return true if children should be drawn with their cache, false otherwise |
| 3638 | * |
| 3639 | * @see #setAlwaysDrawnWithCacheEnabled(boolean) |
| 3640 | * @see #setChildrenDrawnWithCacheEnabled(boolean) |
| 3641 | */ |
Konstantin Lopyrev | bea9516 | 2010-08-10 17:02:18 -0700 | [diff] [blame] | 3642 | @ViewDebug.ExportedProperty(category = "drawing") |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 3643 | protected boolean isChildrenDrawnWithCacheEnabled() { |
| 3644 | return (mGroupFlags & FLAG_CHILDREN_DRAWN_WITH_CACHE) == FLAG_CHILDREN_DRAWN_WITH_CACHE; |
| 3645 | } |
| 3646 | |
| 3647 | /** |
| 3648 | * Tells the ViewGroup to draw its children using their drawing cache. This property |
| 3649 | * is ignored when {@link #isAlwaysDrawnWithCacheEnabled()} is true. A child's drawing cache |
| 3650 | * will be used only if it has been enabled. |
| 3651 | * |
| 3652 | * Subclasses should call this method to start and stop using the drawing cache when |
| 3653 | * they perform performance sensitive operations, like scrolling or animating. |
| 3654 | * |
| 3655 | * @param enabled true if children should be drawn with their cache, false otherwise |
| 3656 | * |
| 3657 | * @see #setAlwaysDrawnWithCacheEnabled(boolean) |
| 3658 | * @see #isChildrenDrawnWithCacheEnabled() |
| 3659 | */ |
| 3660 | protected void setChildrenDrawnWithCacheEnabled(boolean enabled) { |
| 3661 | setBooleanFlag(FLAG_CHILDREN_DRAWN_WITH_CACHE, enabled); |
| 3662 | } |
| 3663 | |
Romain Guy | 293451e | 2009-11-04 13:59:48 -0800 | [diff] [blame] | 3664 | /** |
| 3665 | * Indicates whether the ViewGroup is drawing its children in the order defined by |
| 3666 | * {@link #getChildDrawingOrder(int, int)}. |
| 3667 | * |
| 3668 | * @return true if children drawing order is defined by {@link #getChildDrawingOrder(int, int)}, |
| 3669 | * false otherwise |
| 3670 | * |
| 3671 | * @see #setChildrenDrawingOrderEnabled(boolean) |
| 3672 | * @see #getChildDrawingOrder(int, int) |
| 3673 | */ |
Konstantin Lopyrev | bea9516 | 2010-08-10 17:02:18 -0700 | [diff] [blame] | 3674 | @ViewDebug.ExportedProperty(category = "drawing") |
Romain Guy | 293451e | 2009-11-04 13:59:48 -0800 | [diff] [blame] | 3675 | protected boolean isChildrenDrawingOrderEnabled() { |
| 3676 | return (mGroupFlags & FLAG_USE_CHILD_DRAWING_ORDER) == FLAG_USE_CHILD_DRAWING_ORDER; |
| 3677 | } |
| 3678 | |
| 3679 | /** |
| 3680 | * Tells the ViewGroup whether to draw its children in the order defined by the method |
| 3681 | * {@link #getChildDrawingOrder(int, int)}. |
| 3682 | * |
| 3683 | * @param enabled true if the order of the children when drawing is determined by |
| 3684 | * {@link #getChildDrawingOrder(int, int)}, false otherwise |
| 3685 | * |
| 3686 | * @see #isChildrenDrawingOrderEnabled() |
| 3687 | * @see #getChildDrawingOrder(int, int) |
| 3688 | */ |
| 3689 | protected void setChildrenDrawingOrderEnabled(boolean enabled) { |
| 3690 | setBooleanFlag(FLAG_USE_CHILD_DRAWING_ORDER, enabled); |
| 3691 | } |
| 3692 | |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 3693 | private void setBooleanFlag(int flag, boolean value) { |
| 3694 | if (value) { |
| 3695 | mGroupFlags |= flag; |
| 3696 | } else { |
| 3697 | mGroupFlags &= ~flag; |
| 3698 | } |
| 3699 | } |
| 3700 | |
| 3701 | /** |
| 3702 | * Returns an integer indicating what types of drawing caches are kept in memory. |
| 3703 | * |
| 3704 | * @see #setPersistentDrawingCache(int) |
| 3705 | * @see #setAnimationCacheEnabled(boolean) |
| 3706 | * |
| 3707 | * @return one or a combination of {@link #PERSISTENT_NO_CACHE}, |
| 3708 | * {@link #PERSISTENT_ANIMATION_CACHE}, {@link #PERSISTENT_SCROLLING_CACHE} |
| 3709 | * and {@link #PERSISTENT_ALL_CACHES} |
| 3710 | */ |
Konstantin Lopyrev | bea9516 | 2010-08-10 17:02:18 -0700 | [diff] [blame] | 3711 | @ViewDebug.ExportedProperty(category = "drawing", mapping = { |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 3712 | @ViewDebug.IntToString(from = PERSISTENT_NO_CACHE, to = "NONE"), |
Romain Guy | 203688c | 2010-05-12 15:41:32 -0700 | [diff] [blame] | 3713 | @ViewDebug.IntToString(from = PERSISTENT_ANIMATION_CACHE, to = "ANIMATION"), |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 3714 | @ViewDebug.IntToString(from = PERSISTENT_SCROLLING_CACHE, to = "SCROLLING"), |
| 3715 | @ViewDebug.IntToString(from = PERSISTENT_ALL_CACHES, to = "ALL") |
| 3716 | }) |
| 3717 | public int getPersistentDrawingCache() { |
| 3718 | return mPersistentDrawingCache; |
| 3719 | } |
| 3720 | |
| 3721 | /** |
| 3722 | * Indicates what types of drawing caches should be kept in memory after |
| 3723 | * they have been created. |
| 3724 | * |
| 3725 | * @see #getPersistentDrawingCache() |
| 3726 | * @see #setAnimationCacheEnabled(boolean) |
| 3727 | * |
| 3728 | * @param drawingCacheToKeep one or a combination of {@link #PERSISTENT_NO_CACHE}, |
| 3729 | * {@link #PERSISTENT_ANIMATION_CACHE}, {@link #PERSISTENT_SCROLLING_CACHE} |
| 3730 | * and {@link #PERSISTENT_ALL_CACHES} |
| 3731 | */ |
| 3732 | public void setPersistentDrawingCache(int drawingCacheToKeep) { |
| 3733 | mPersistentDrawingCache = drawingCacheToKeep & PERSISTENT_ALL_CACHES; |
| 3734 | } |
| 3735 | |
| 3736 | /** |
| 3737 | * Returns a new set of layout parameters based on the supplied attributes set. |
| 3738 | * |
| 3739 | * @param attrs the attributes to build the layout parameters from |
| 3740 | * |
| 3741 | * @return an instance of {@link android.view.ViewGroup.LayoutParams} or one |
| 3742 | * of its descendants |
| 3743 | */ |
| 3744 | public LayoutParams generateLayoutParams(AttributeSet attrs) { |
| 3745 | return new LayoutParams(getContext(), attrs); |
| 3746 | } |
| 3747 | |
| 3748 | /** |
| 3749 | * Returns a safe set of layout parameters based on the supplied layout params. |
| 3750 | * When a ViewGroup is passed a View whose layout params do not pass the test of |
| 3751 | * {@link #checkLayoutParams(android.view.ViewGroup.LayoutParams)}, this method |
| 3752 | * is invoked. This method should return a new set of layout params suitable for |
| 3753 | * this ViewGroup, possibly by copying the appropriate attributes from the |
| 3754 | * specified set of layout params. |
| 3755 | * |
| 3756 | * @param p The layout parameters to convert into a suitable set of layout parameters |
| 3757 | * for this ViewGroup. |
| 3758 | * |
| 3759 | * @return an instance of {@link android.view.ViewGroup.LayoutParams} or one |
| 3760 | * of its descendants |
| 3761 | */ |
| 3762 | protected LayoutParams generateLayoutParams(ViewGroup.LayoutParams p) { |
| 3763 | return p; |
| 3764 | } |
| 3765 | |
| 3766 | /** |
| 3767 | * Returns a set of default layout parameters. These parameters are requested |
| 3768 | * when the View passed to {@link #addView(View)} has no layout parameters |
| 3769 | * already set. If null is returned, an exception is thrown from addView. |
| 3770 | * |
| 3771 | * @return a set of default layout parameters or null |
| 3772 | */ |
| 3773 | protected LayoutParams generateDefaultLayoutParams() { |
| 3774 | return new LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT); |
| 3775 | } |
| 3776 | |
| 3777 | /** |
Romain Guy | 13922e0 | 2009-05-12 17:56:14 -0700 | [diff] [blame] | 3778 | * @hide |
| 3779 | */ |
| 3780 | @Override |
| 3781 | protected boolean dispatchConsistencyCheck(int consistency) { |
| 3782 | boolean result = super.dispatchConsistencyCheck(consistency); |
| 3783 | |
| 3784 | final int count = mChildrenCount; |
| 3785 | final View[] children = mChildren; |
| 3786 | for (int i = 0; i < count; i++) { |
| 3787 | if (!children[i].dispatchConsistencyCheck(consistency)) result = false; |
| 3788 | } |
| 3789 | |
| 3790 | return result; |
| 3791 | } |
| 3792 | |
| 3793 | /** |
| 3794 | * @hide |
| 3795 | */ |
| 3796 | @Override |
| 3797 | protected boolean onConsistencyCheck(int consistency) { |
| 3798 | boolean result = super.onConsistencyCheck(consistency); |
| 3799 | |
| 3800 | final boolean checkLayout = (consistency & ViewDebug.CONSISTENCY_LAYOUT) != 0; |
| 3801 | final boolean checkDrawing = (consistency & ViewDebug.CONSISTENCY_DRAWING) != 0; |
| 3802 | |
| 3803 | if (checkLayout) { |
| 3804 | final int count = mChildrenCount; |
| 3805 | final View[] children = mChildren; |
| 3806 | for (int i = 0; i < count; i++) { |
| 3807 | if (children[i].getParent() != this) { |
| 3808 | result = false; |
| 3809 | android.util.Log.d(ViewDebug.CONSISTENCY_LOG_TAG, |
| 3810 | "View " + children[i] + " has no parent/a parent that is not " + this); |
| 3811 | } |
| 3812 | } |
| 3813 | } |
| 3814 | |
| 3815 | if (checkDrawing) { |
| 3816 | // If this group is dirty, check that the parent is dirty as well |
| 3817 | if ((mPrivateFlags & DIRTY_MASK) != 0) { |
| 3818 | final ViewParent parent = getParent(); |
| 3819 | if (parent != null && !(parent instanceof ViewRoot)) { |
| 3820 | if ((((View) parent).mPrivateFlags & DIRTY_MASK) == 0) { |
| 3821 | result = false; |
| 3822 | android.util.Log.d(ViewDebug.CONSISTENCY_LOG_TAG, |
| 3823 | "ViewGroup " + this + " is dirty but its parent is not: " + this); |
| 3824 | } |
| 3825 | } |
| 3826 | } |
| 3827 | } |
| 3828 | |
| 3829 | return result; |
| 3830 | } |
| 3831 | |
| 3832 | /** |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 3833 | * {@inheritDoc} |
| 3834 | */ |
| 3835 | @Override |
| 3836 | protected void debug(int depth) { |
| 3837 | super.debug(depth); |
| 3838 | String output; |
| 3839 | |
| 3840 | if (mFocused != null) { |
| 3841 | output = debugIndent(depth); |
| 3842 | output += "mFocused"; |
| 3843 | Log.d(VIEW_LOG_TAG, output); |
| 3844 | } |
| 3845 | if (mChildrenCount != 0) { |
| 3846 | output = debugIndent(depth); |
| 3847 | output += "{"; |
| 3848 | Log.d(VIEW_LOG_TAG, output); |
| 3849 | } |
| 3850 | int count = mChildrenCount; |
| 3851 | for (int i = 0; i < count; i++) { |
| 3852 | View child = mChildren[i]; |
| 3853 | child.debug(depth + 1); |
| 3854 | } |
| 3855 | |
| 3856 | if (mChildrenCount != 0) { |
| 3857 | output = debugIndent(depth); |
| 3858 | output += "}"; |
| 3859 | Log.d(VIEW_LOG_TAG, output); |
| 3860 | } |
| 3861 | } |
| 3862 | |
| 3863 | /** |
| 3864 | * Returns the position in the group of the specified child view. |
| 3865 | * |
| 3866 | * @param child the view for which to get the position |
| 3867 | * @return a positive integer representing the position of the view in the |
| 3868 | * group, or -1 if the view does not exist in the group |
| 3869 | */ |
| 3870 | public int indexOfChild(View child) { |
| 3871 | final int count = mChildrenCount; |
| 3872 | final View[] children = mChildren; |
| 3873 | for (int i = 0; i < count; i++) { |
| 3874 | if (children[i] == child) { |
| 3875 | return i; |
| 3876 | } |
| 3877 | } |
| 3878 | return -1; |
| 3879 | } |
| 3880 | |
| 3881 | /** |
| 3882 | * Returns the number of children in the group. |
| 3883 | * |
| 3884 | * @return a positive integer representing the number of children in |
| 3885 | * the group |
| 3886 | */ |
| 3887 | public int getChildCount() { |
| 3888 | return mChildrenCount; |
| 3889 | } |
| 3890 | |
| 3891 | /** |
| 3892 | * Returns the view at the specified position in the group. |
| 3893 | * |
| 3894 | * @param index the position at which to get the view from |
| 3895 | * @return the view at the specified position or null if the position |
| 3896 | * does not exist within the group |
| 3897 | */ |
| 3898 | public View getChildAt(int index) { |
| 3899 | try { |
| 3900 | return mChildren[index]; |
| 3901 | } catch (IndexOutOfBoundsException ex) { |
| 3902 | return null; |
| 3903 | } |
| 3904 | } |
| 3905 | |
| 3906 | /** |
| 3907 | * Ask all of the children of this view to measure themselves, taking into |
| 3908 | * account both the MeasureSpec requirements for this view and its padding. |
| 3909 | * We skip children that are in the GONE state The heavy lifting is done in |
| 3910 | * getChildMeasureSpec. |
| 3911 | * |
| 3912 | * @param widthMeasureSpec The width requirements for this view |
| 3913 | * @param heightMeasureSpec The height requirements for this view |
| 3914 | */ |
| 3915 | protected void measureChildren(int widthMeasureSpec, int heightMeasureSpec) { |
| 3916 | final int size = mChildrenCount; |
| 3917 | final View[] children = mChildren; |
| 3918 | for (int i = 0; i < size; ++i) { |
| 3919 | final View child = children[i]; |
| 3920 | if ((child.mViewFlags & VISIBILITY_MASK) != GONE) { |
| 3921 | measureChild(child, widthMeasureSpec, heightMeasureSpec); |
| 3922 | } |
| 3923 | } |
| 3924 | } |
| 3925 | |
| 3926 | /** |
| 3927 | * Ask one of the children of this view to measure itself, taking into |
| 3928 | * account both the MeasureSpec requirements for this view and its padding. |
| 3929 | * The heavy lifting is done in getChildMeasureSpec. |
| 3930 | * |
| 3931 | * @param child The child to measure |
| 3932 | * @param parentWidthMeasureSpec The width requirements for this view |
| 3933 | * @param parentHeightMeasureSpec The height requirements for this view |
| 3934 | */ |
| 3935 | protected void measureChild(View child, int parentWidthMeasureSpec, |
| 3936 | int parentHeightMeasureSpec) { |
| 3937 | final LayoutParams lp = child.getLayoutParams(); |
| 3938 | |
| 3939 | final int childWidthMeasureSpec = getChildMeasureSpec(parentWidthMeasureSpec, |
| 3940 | mPaddingLeft + mPaddingRight, lp.width); |
| 3941 | final int childHeightMeasureSpec = getChildMeasureSpec(parentHeightMeasureSpec, |
| 3942 | mPaddingTop + mPaddingBottom, lp.height); |
| 3943 | |
| 3944 | child.measure(childWidthMeasureSpec, childHeightMeasureSpec); |
| 3945 | } |
| 3946 | |
| 3947 | /** |
| 3948 | * Ask one of the children of this view to measure itself, taking into |
| 3949 | * account both the MeasureSpec requirements for this view and its padding |
| 3950 | * and margins. The child must have MarginLayoutParams The heavy lifting is |
| 3951 | * done in getChildMeasureSpec. |
| 3952 | * |
| 3953 | * @param child The child to measure |
| 3954 | * @param parentWidthMeasureSpec The width requirements for this view |
| 3955 | * @param widthUsed Extra space that has been used up by the parent |
| 3956 | * horizontally (possibly by other children of the parent) |
| 3957 | * @param parentHeightMeasureSpec The height requirements for this view |
| 3958 | * @param heightUsed Extra space that has been used up by the parent |
| 3959 | * vertically (possibly by other children of the parent) |
| 3960 | */ |
| 3961 | protected void measureChildWithMargins(View child, |
| 3962 | int parentWidthMeasureSpec, int widthUsed, |
| 3963 | int parentHeightMeasureSpec, int heightUsed) { |
| 3964 | final MarginLayoutParams lp = (MarginLayoutParams) child.getLayoutParams(); |
| 3965 | |
| 3966 | final int childWidthMeasureSpec = getChildMeasureSpec(parentWidthMeasureSpec, |
| 3967 | mPaddingLeft + mPaddingRight + lp.leftMargin + lp.rightMargin |
| 3968 | + widthUsed, lp.width); |
| 3969 | final int childHeightMeasureSpec = getChildMeasureSpec(parentHeightMeasureSpec, |
| 3970 | mPaddingTop + mPaddingBottom + lp.topMargin + lp.bottomMargin |
| 3971 | + heightUsed, lp.height); |
| 3972 | |
| 3973 | child.measure(childWidthMeasureSpec, childHeightMeasureSpec); |
| 3974 | } |
| 3975 | |
| 3976 | /** |
| 3977 | * Does the hard part of measureChildren: figuring out the MeasureSpec to |
| 3978 | * pass to a particular child. This method figures out the right MeasureSpec |
| 3979 | * for one dimension (height or width) of one child view. |
| 3980 | * |
| 3981 | * The goal is to combine information from our MeasureSpec with the |
| 3982 | * LayoutParams of the child to get the best possible results. For example, |
| 3983 | * if the this view knows its size (because its MeasureSpec has a mode of |
| 3984 | * EXACTLY), and the child has indicated in its LayoutParams that it wants |
| 3985 | * to be the same size as the parent, the parent should ask the child to |
| 3986 | * layout given an exact size. |
| 3987 | * |
| 3988 | * @param spec The requirements for this view |
| 3989 | * @param padding The padding of this view for the current dimension and |
| 3990 | * margins, if applicable |
| 3991 | * @param childDimension How big the child wants to be in the current |
| 3992 | * dimension |
| 3993 | * @return a MeasureSpec integer for the child |
| 3994 | */ |
| 3995 | public static int getChildMeasureSpec(int spec, int padding, int childDimension) { |
| 3996 | int specMode = MeasureSpec.getMode(spec); |
| 3997 | int specSize = MeasureSpec.getSize(spec); |
| 3998 | |
| 3999 | int size = Math.max(0, specSize - padding); |
| 4000 | |
| 4001 | int resultSize = 0; |
| 4002 | int resultMode = 0; |
| 4003 | |
| 4004 | switch (specMode) { |
| 4005 | // Parent has imposed an exact size on us |
| 4006 | case MeasureSpec.EXACTLY: |
| 4007 | if (childDimension >= 0) { |
| 4008 | resultSize = childDimension; |
| 4009 | resultMode = MeasureSpec.EXACTLY; |
Romain Guy | 980a938 | 2010-01-08 15:06:28 -0800 | [diff] [blame] | 4010 | } else if (childDimension == LayoutParams.MATCH_PARENT) { |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 4011 | // Child wants to be our size. So be it. |
| 4012 | resultSize = size; |
| 4013 | resultMode = MeasureSpec.EXACTLY; |
| 4014 | } else if (childDimension == LayoutParams.WRAP_CONTENT) { |
| 4015 | // Child wants to determine its own size. It can't be |
| 4016 | // bigger than us. |
| 4017 | resultSize = size; |
| 4018 | resultMode = MeasureSpec.AT_MOST; |
| 4019 | } |
| 4020 | break; |
| 4021 | |
| 4022 | // Parent has imposed a maximum size on us |
| 4023 | case MeasureSpec.AT_MOST: |
| 4024 | if (childDimension >= 0) { |
| 4025 | // Child wants a specific size... so be it |
| 4026 | resultSize = childDimension; |
| 4027 | resultMode = MeasureSpec.EXACTLY; |
Romain Guy | 980a938 | 2010-01-08 15:06:28 -0800 | [diff] [blame] | 4028 | } else if (childDimension == LayoutParams.MATCH_PARENT) { |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 4029 | // Child wants to be our size, but our size is not fixed. |
| 4030 | // Constrain child to not be bigger than us. |
| 4031 | resultSize = size; |
| 4032 | resultMode = MeasureSpec.AT_MOST; |
| 4033 | } else if (childDimension == LayoutParams.WRAP_CONTENT) { |
| 4034 | // Child wants to determine its own size. It can't be |
| 4035 | // bigger than us. |
| 4036 | resultSize = size; |
| 4037 | resultMode = MeasureSpec.AT_MOST; |
| 4038 | } |
| 4039 | break; |
| 4040 | |
| 4041 | // Parent asked to see how big we want to be |
| 4042 | case MeasureSpec.UNSPECIFIED: |
| 4043 | if (childDimension >= 0) { |
| 4044 | // Child wants a specific size... let him have it |
| 4045 | resultSize = childDimension; |
| 4046 | resultMode = MeasureSpec.EXACTLY; |
Romain Guy | 980a938 | 2010-01-08 15:06:28 -0800 | [diff] [blame] | 4047 | } else if (childDimension == LayoutParams.MATCH_PARENT) { |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 4048 | // Child wants to be our size... find out how big it should |
| 4049 | // be |
| 4050 | resultSize = 0; |
| 4051 | resultMode = MeasureSpec.UNSPECIFIED; |
| 4052 | } else if (childDimension == LayoutParams.WRAP_CONTENT) { |
| 4053 | // Child wants to determine its own size.... find out how |
| 4054 | // big it should be |
| 4055 | resultSize = 0; |
| 4056 | resultMode = MeasureSpec.UNSPECIFIED; |
| 4057 | } |
| 4058 | break; |
| 4059 | } |
| 4060 | return MeasureSpec.makeMeasureSpec(resultSize, resultMode); |
| 4061 | } |
| 4062 | |
| 4063 | |
| 4064 | /** |
| 4065 | * Removes any pending animations for views that have been removed. Call |
| 4066 | * this if you don't want animations for exiting views to stack up. |
| 4067 | */ |
| 4068 | public void clearDisappearingChildren() { |
| 4069 | if (mDisappearingChildren != null) { |
| 4070 | mDisappearingChildren.clear(); |
| 4071 | } |
| 4072 | } |
| 4073 | |
| 4074 | /** |
| 4075 | * Add a view which is removed from mChildren but still needs animation |
| 4076 | * |
| 4077 | * @param v View to add |
| 4078 | */ |
| 4079 | private void addDisappearingView(View v) { |
| 4080 | ArrayList<View> disappearingChildren = mDisappearingChildren; |
| 4081 | |
| 4082 | if (disappearingChildren == null) { |
| 4083 | disappearingChildren = mDisappearingChildren = new ArrayList<View>(); |
| 4084 | } |
| 4085 | |
| 4086 | disappearingChildren.add(v); |
| 4087 | } |
| 4088 | |
| 4089 | /** |
| 4090 | * Cleanup a view when its animation is done. This may mean removing it from |
| 4091 | * the list of disappearing views. |
| 4092 | * |
| 4093 | * @param view The view whose animation has finished |
| 4094 | * @param animation The animation, cannot be null |
| 4095 | */ |
| 4096 | private void finishAnimatingView(final View view, Animation animation) { |
| 4097 | final ArrayList<View> disappearingChildren = mDisappearingChildren; |
| 4098 | if (disappearingChildren != null) { |
| 4099 | if (disappearingChildren.contains(view)) { |
| 4100 | disappearingChildren.remove(view); |
| 4101 | |
| 4102 | if (view.mAttachInfo != null) { |
| 4103 | view.dispatchDetachedFromWindow(); |
| 4104 | } |
| 4105 | |
| 4106 | view.clearAnimation(); |
| 4107 | mGroupFlags |= FLAG_INVALIDATE_REQUIRED; |
| 4108 | } |
| 4109 | } |
| 4110 | |
| 4111 | if (animation != null && !animation.getFillAfter()) { |
| 4112 | view.clearAnimation(); |
| 4113 | } |
| 4114 | |
| 4115 | if ((view.mPrivateFlags & ANIMATION_STARTED) == ANIMATION_STARTED) { |
| 4116 | view.onAnimationEnd(); |
| 4117 | // Should be performed by onAnimationEnd() but this avoid an infinite loop, |
| 4118 | // so we'd rather be safe than sorry |
| 4119 | view.mPrivateFlags &= ~ANIMATION_STARTED; |
| 4120 | // Draw one more frame after the animation is done |
| 4121 | mGroupFlags |= FLAG_INVALIDATE_REQUIRED; |
| 4122 | } |
| 4123 | } |
| 4124 | |
Chet Haase | b20db3e | 2010-09-10 13:07:30 -0700 | [diff] [blame] | 4125 | /** |
| 4126 | * This method tells the ViewGroup that the given View object, which should have this |
| 4127 | * ViewGroup as its parent, |
| 4128 | * should be kept around (re-displayed when the ViewGroup draws its children) even if it |
| 4129 | * is removed from its parent. This allows animations, such as those used by |
| 4130 | * {@link android.app.Fragment} and {@link android.animation.LayoutTransition} to animate |
| 4131 | * the removal of views. A call to this method should always be accompanied by a later call |
| 4132 | * to {@link #endViewTransition(View)}, such as after an animation on the View has finished, |
| 4133 | * so that the View finally gets removed. |
| 4134 | * |
| 4135 | * @param view The View object to be kept visible even if it gets removed from its parent. |
| 4136 | */ |
| 4137 | public void startViewTransition(View view) { |
| 4138 | if (view.mParent == this) { |
| 4139 | if (mTransitioningViews == null) { |
| 4140 | mTransitioningViews = new ArrayList<View>(); |
| 4141 | } |
| 4142 | mTransitioningViews.add(view); |
| 4143 | } |
| 4144 | } |
| 4145 | |
| 4146 | /** |
| 4147 | * This method should always be called following an earlier call to |
| 4148 | * {@link #startViewTransition(View)}. The given View is finally removed from its parent |
| 4149 | * and will no longer be displayed. Note that this method does not perform the functionality |
| 4150 | * of removing a view from its parent; it just discontinues the display of a View that |
| 4151 | * has previously been removed. |
| 4152 | * |
| 4153 | * @return view The View object that has been removed but is being kept around in the visible |
| 4154 | * hierarchy by an earlier call to {@link #startViewTransition(View)}. |
| 4155 | */ |
| 4156 | public void endViewTransition(View view) { |
| 4157 | if (mTransitioningViews != null) { |
| 4158 | mTransitioningViews.remove(view); |
| 4159 | final ArrayList<View> disappearingChildren = mDisappearingChildren; |
| 4160 | if (disappearingChildren != null && disappearingChildren.contains(view)) { |
| 4161 | disappearingChildren.remove(view); |
Chet Haase | 5e25c2c | 2010-09-16 11:15:56 -0700 | [diff] [blame] | 4162 | if (mVisibilityChangingChildren != null && |
| 4163 | mVisibilityChangingChildren.contains(view)) { |
| 4164 | mVisibilityChangingChildren.remove(view); |
| 4165 | } else { |
| 4166 | if (view.mAttachInfo != null) { |
| 4167 | view.dispatchDetachedFromWindow(); |
| 4168 | } |
| 4169 | if (view.mParent != null) { |
| 4170 | view.mParent = null; |
| 4171 | } |
Chet Haase | b20db3e | 2010-09-10 13:07:30 -0700 | [diff] [blame] | 4172 | } |
| 4173 | mGroupFlags |= FLAG_INVALIDATE_REQUIRED; |
| 4174 | } |
| 4175 | } |
| 4176 | } |
| 4177 | |
Chet Haase | 21cd138 | 2010-09-01 17:42:29 -0700 | [diff] [blame] | 4178 | private LayoutTransition.TransitionListener mLayoutTransitionListener = |
| 4179 | new LayoutTransition.TransitionListener() { |
| 4180 | @Override |
| 4181 | public void startTransition(LayoutTransition transition, ViewGroup container, |
| 4182 | View view, int transitionType) { |
| 4183 | // We only care about disappearing items, since we need special logic to keep |
| 4184 | // those items visible after they've been 'removed' |
| 4185 | if (transitionType == LayoutTransition.DISAPPEARING) { |
Chet Haase | b20db3e | 2010-09-10 13:07:30 -0700 | [diff] [blame] | 4186 | startViewTransition(view); |
Chet Haase | 21cd138 | 2010-09-01 17:42:29 -0700 | [diff] [blame] | 4187 | } |
| 4188 | } |
| 4189 | |
| 4190 | @Override |
| 4191 | public void endTransition(LayoutTransition transition, ViewGroup container, |
| 4192 | View view, int transitionType) { |
| 4193 | if (transitionType == LayoutTransition.DISAPPEARING && mTransitioningViews != null) { |
Chet Haase | b20db3e | 2010-09-10 13:07:30 -0700 | [diff] [blame] | 4194 | endViewTransition(view); |
Chet Haase | 21cd138 | 2010-09-01 17:42:29 -0700 | [diff] [blame] | 4195 | } |
| 4196 | } |
| 4197 | }; |
| 4198 | |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 4199 | /** |
| 4200 | * {@inheritDoc} |
| 4201 | */ |
| 4202 | @Override |
| 4203 | public boolean gatherTransparentRegion(Region region) { |
| 4204 | // If no transparent regions requested, we are always opaque. |
| 4205 | final boolean meOpaque = (mPrivateFlags & View.REQUEST_TRANSPARENT_REGIONS) == 0; |
| 4206 | if (meOpaque && region == null) { |
| 4207 | // The caller doesn't care about the region, so stop now. |
| 4208 | return true; |
| 4209 | } |
| 4210 | super.gatherTransparentRegion(region); |
| 4211 | final View[] children = mChildren; |
| 4212 | final int count = mChildrenCount; |
| 4213 | boolean noneOfTheChildrenAreTransparent = true; |
| 4214 | for (int i = 0; i < count; i++) { |
| 4215 | final View child = children[i]; |
| 4216 | if ((child.mViewFlags & VISIBILITY_MASK) != GONE || child.getAnimation() != null) { |
| 4217 | if (!child.gatherTransparentRegion(region)) { |
| 4218 | noneOfTheChildrenAreTransparent = false; |
| 4219 | } |
| 4220 | } |
| 4221 | } |
| 4222 | return meOpaque || noneOfTheChildrenAreTransparent; |
| 4223 | } |
| 4224 | |
| 4225 | /** |
| 4226 | * {@inheritDoc} |
| 4227 | */ |
| 4228 | public void requestTransparentRegion(View child) { |
| 4229 | if (child != null) { |
| 4230 | child.mPrivateFlags |= View.REQUEST_TRANSPARENT_REGIONS; |
| 4231 | if (mParent != null) { |
| 4232 | mParent.requestTransparentRegion(this); |
| 4233 | } |
| 4234 | } |
| 4235 | } |
Romain Guy | 8506ab4 | 2009-06-11 17:35:47 -0700 | [diff] [blame] | 4236 | |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 4237 | |
| 4238 | @Override |
| 4239 | protected boolean fitSystemWindows(Rect insets) { |
| 4240 | boolean done = super.fitSystemWindows(insets); |
| 4241 | if (!done) { |
| 4242 | final int count = mChildrenCount; |
| 4243 | final View[] children = mChildren; |
| 4244 | for (int i = 0; i < count; i++) { |
| 4245 | done = children[i].fitSystemWindows(insets); |
| 4246 | if (done) { |
| 4247 | break; |
| 4248 | } |
| 4249 | } |
| 4250 | } |
| 4251 | return done; |
| 4252 | } |
| 4253 | |
| 4254 | /** |
| 4255 | * Returns the animation listener to which layout animation events are |
| 4256 | * sent. |
| 4257 | * |
| 4258 | * @return an {@link android.view.animation.Animation.AnimationListener} |
| 4259 | */ |
| 4260 | public Animation.AnimationListener getLayoutAnimationListener() { |
| 4261 | return mAnimationListener; |
| 4262 | } |
| 4263 | |
| 4264 | @Override |
| 4265 | protected void drawableStateChanged() { |
| 4266 | super.drawableStateChanged(); |
| 4267 | |
| 4268 | if ((mGroupFlags & FLAG_NOTIFY_CHILDREN_ON_DRAWABLE_STATE_CHANGE) != 0) { |
| 4269 | if ((mGroupFlags & FLAG_ADD_STATES_FROM_CHILDREN) != 0) { |
| 4270 | throw new IllegalStateException("addStateFromChildren cannot be enabled if a" |
| 4271 | + " child has duplicateParentState set to true"); |
| 4272 | } |
| 4273 | |
| 4274 | final View[] children = mChildren; |
| 4275 | final int count = mChildrenCount; |
| 4276 | |
| 4277 | for (int i = 0; i < count; i++) { |
| 4278 | final View child = children[i]; |
| 4279 | if ((child.mViewFlags & DUPLICATE_PARENT_STATE) != 0) { |
| 4280 | child.refreshDrawableState(); |
| 4281 | } |
| 4282 | } |
| 4283 | } |
| 4284 | } |
| 4285 | |
| 4286 | @Override |
Dianne Hackborn | e213677 | 2010-11-04 15:08:59 -0700 | [diff] [blame^] | 4287 | public void jumpDrawablesToCurrentState() { |
| 4288 | super.jumpDrawablesToCurrentState(); |
| 4289 | final View[] children = mChildren; |
| 4290 | final int count = mChildrenCount; |
| 4291 | for (int i = 0; i < count; i++) { |
| 4292 | children[i].jumpDrawablesToCurrentState(); |
| 4293 | } |
| 4294 | } |
| 4295 | |
| 4296 | @Override |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 4297 | protected int[] onCreateDrawableState(int extraSpace) { |
| 4298 | if ((mGroupFlags & FLAG_ADD_STATES_FROM_CHILDREN) == 0) { |
| 4299 | return super.onCreateDrawableState(extraSpace); |
| 4300 | } |
| 4301 | |
| 4302 | int need = 0; |
| 4303 | int n = getChildCount(); |
| 4304 | for (int i = 0; i < n; i++) { |
| 4305 | int[] childState = getChildAt(i).getDrawableState(); |
| 4306 | |
| 4307 | if (childState != null) { |
| 4308 | need += childState.length; |
| 4309 | } |
| 4310 | } |
| 4311 | |
| 4312 | int[] state = super.onCreateDrawableState(extraSpace + need); |
| 4313 | |
| 4314 | for (int i = 0; i < n; i++) { |
| 4315 | int[] childState = getChildAt(i).getDrawableState(); |
| 4316 | |
| 4317 | if (childState != null) { |
| 4318 | state = mergeDrawableStates(state, childState); |
| 4319 | } |
| 4320 | } |
| 4321 | |
| 4322 | return state; |
| 4323 | } |
| 4324 | |
| 4325 | /** |
| 4326 | * Sets whether this ViewGroup's drawable states also include |
| 4327 | * its children's drawable states. This is used, for example, to |
| 4328 | * make a group appear to be focused when its child EditText or button |
| 4329 | * is focused. |
| 4330 | */ |
| 4331 | public void setAddStatesFromChildren(boolean addsStates) { |
| 4332 | if (addsStates) { |
| 4333 | mGroupFlags |= FLAG_ADD_STATES_FROM_CHILDREN; |
| 4334 | } else { |
| 4335 | mGroupFlags &= ~FLAG_ADD_STATES_FROM_CHILDREN; |
| 4336 | } |
| 4337 | |
| 4338 | refreshDrawableState(); |
| 4339 | } |
| 4340 | |
| 4341 | /** |
| 4342 | * Returns whether this ViewGroup's drawable states also include |
| 4343 | * its children's drawable states. This is used, for example, to |
| 4344 | * make a group appear to be focused when its child EditText or button |
| 4345 | * is focused. |
| 4346 | */ |
| 4347 | public boolean addStatesFromChildren() { |
| 4348 | return (mGroupFlags & FLAG_ADD_STATES_FROM_CHILDREN) != 0; |
| 4349 | } |
| 4350 | |
| 4351 | /** |
| 4352 | * If {link #addStatesFromChildren} is true, refreshes this group's |
| 4353 | * drawable state (to include the states from its children). |
| 4354 | */ |
| 4355 | public void childDrawableStateChanged(View child) { |
| 4356 | if ((mGroupFlags & FLAG_ADD_STATES_FROM_CHILDREN) != 0) { |
| 4357 | refreshDrawableState(); |
| 4358 | } |
| 4359 | } |
| 4360 | |
| 4361 | /** |
| 4362 | * Specifies the animation listener to which layout animation events must |
| 4363 | * be sent. Only |
| 4364 | * {@link android.view.animation.Animation.AnimationListener#onAnimationStart(Animation)} |
| 4365 | * and |
| 4366 | * {@link android.view.animation.Animation.AnimationListener#onAnimationEnd(Animation)} |
| 4367 | * are invoked. |
| 4368 | * |
| 4369 | * @param animationListener the layout animation listener |
| 4370 | */ |
| 4371 | public void setLayoutAnimationListener(Animation.AnimationListener animationListener) { |
| 4372 | mAnimationListener = animationListener; |
| 4373 | } |
| 4374 | |
| 4375 | /** |
| 4376 | * LayoutParams are used by views to tell their parents how they want to be |
| 4377 | * laid out. See |
| 4378 | * {@link android.R.styleable#ViewGroup_Layout ViewGroup Layout Attributes} |
| 4379 | * for a list of all child view attributes that this class supports. |
Romain Guy | 8506ab4 | 2009-06-11 17:35:47 -0700 | [diff] [blame] | 4380 | * |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 4381 | * <p> |
| 4382 | * The base LayoutParams class just describes how big the view wants to be |
| 4383 | * for both width and height. For each dimension, it can specify one of: |
| 4384 | * <ul> |
Dirk Dougherty | 75c66da | 2010-03-25 16:33:33 -0700 | [diff] [blame] | 4385 | * <li>FILL_PARENT (renamed MATCH_PARENT in API Level 8 and higher), which |
| 4386 | * means that the view wants to be as big as its parent (minus padding) |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 4387 | * <li> WRAP_CONTENT, which means that the view wants to be just big enough |
| 4388 | * to enclose its content (plus padding) |
Dirk Dougherty | 75c66da | 2010-03-25 16:33:33 -0700 | [diff] [blame] | 4389 | * <li> an exact number |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 4390 | * </ul> |
| 4391 | * There are subclasses of LayoutParams for different subclasses of |
| 4392 | * ViewGroup. For example, AbsoluteLayout has its own subclass of |
| 4393 | * LayoutParams which adds an X and Y value. |
| 4394 | * |
| 4395 | * @attr ref android.R.styleable#ViewGroup_Layout_layout_height |
| 4396 | * @attr ref android.R.styleable#ViewGroup_Layout_layout_width |
| 4397 | */ |
| 4398 | public static class LayoutParams { |
| 4399 | /** |
Dirk Dougherty | 75c66da | 2010-03-25 16:33:33 -0700 | [diff] [blame] | 4400 | * Special value for the height or width requested by a View. |
| 4401 | * FILL_PARENT means that the view wants to be as big as its parent, |
| 4402 | * minus the parent's padding, if any. This value is deprecated |
| 4403 | * starting in API Level 8 and replaced by {@link #MATCH_PARENT}. |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 4404 | */ |
Romain Guy | 980a938 | 2010-01-08 15:06:28 -0800 | [diff] [blame] | 4405 | @SuppressWarnings({"UnusedDeclaration"}) |
| 4406 | @Deprecated |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 4407 | public static final int FILL_PARENT = -1; |
| 4408 | |
| 4409 | /** |
| 4410 | * Special value for the height or width requested by a View. |
Gilles Debunne | f5c6eff | 2010-02-09 19:08:36 -0800 | [diff] [blame] | 4411 | * MATCH_PARENT means that the view wants to be as big as its parent, |
Dirk Dougherty | 75c66da | 2010-03-25 16:33:33 -0700 | [diff] [blame] | 4412 | * minus the parent's padding, if any. Introduced in API Level 8. |
Romain Guy | 980a938 | 2010-01-08 15:06:28 -0800 | [diff] [blame] | 4413 | */ |
| 4414 | public static final int MATCH_PARENT = -1; |
| 4415 | |
| 4416 | /** |
| 4417 | * Special value for the height or width requested by a View. |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 4418 | * WRAP_CONTENT means that the view wants to be just large enough to fit |
| 4419 | * its own internal content, taking its own padding into account. |
| 4420 | */ |
| 4421 | public static final int WRAP_CONTENT = -2; |
| 4422 | |
| 4423 | /** |
Dirk Dougherty | 75c66da | 2010-03-25 16:33:33 -0700 | [diff] [blame] | 4424 | * Information about how wide the view wants to be. Can be one of the |
| 4425 | * constants FILL_PARENT (replaced by MATCH_PARENT , |
| 4426 | * in API Level 8) or WRAP_CONTENT. or an exact size. |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 4427 | */ |
Konstantin Lopyrev | bea9516 | 2010-08-10 17:02:18 -0700 | [diff] [blame] | 4428 | @ViewDebug.ExportedProperty(category = "layout", mapping = { |
Romain Guy | 980a938 | 2010-01-08 15:06:28 -0800 | [diff] [blame] | 4429 | @ViewDebug.IntToString(from = MATCH_PARENT, to = "MATCH_PARENT"), |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 4430 | @ViewDebug.IntToString(from = WRAP_CONTENT, to = "WRAP_CONTENT") |
| 4431 | }) |
| 4432 | public int width; |
| 4433 | |
| 4434 | /** |
Dirk Dougherty | 75c66da | 2010-03-25 16:33:33 -0700 | [diff] [blame] | 4435 | * Information about how tall the view wants to be. Can be one of the |
| 4436 | * constants FILL_PARENT (replaced by MATCH_PARENT , |
| 4437 | * in API Level 8) or WRAP_CONTENT. or an exact size. |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 4438 | */ |
Konstantin Lopyrev | bea9516 | 2010-08-10 17:02:18 -0700 | [diff] [blame] | 4439 | @ViewDebug.ExportedProperty(category = "layout", mapping = { |
Romain Guy | 980a938 | 2010-01-08 15:06:28 -0800 | [diff] [blame] | 4440 | @ViewDebug.IntToString(from = MATCH_PARENT, to = "MATCH_PARENT"), |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 4441 | @ViewDebug.IntToString(from = WRAP_CONTENT, to = "WRAP_CONTENT") |
| 4442 | }) |
| 4443 | public int height; |
| 4444 | |
| 4445 | /** |
| 4446 | * Used to animate layouts. |
| 4447 | */ |
| 4448 | public LayoutAnimationController.AnimationParameters layoutAnimationParameters; |
| 4449 | |
| 4450 | /** |
| 4451 | * Creates a new set of layout parameters. The values are extracted from |
| 4452 | * the supplied attributes set and context. The XML attributes mapped |
| 4453 | * to this set of layout parameters are: |
| 4454 | * |
| 4455 | * <ul> |
| 4456 | * <li><code>layout_width</code>: the width, either an exact value, |
Dirk Dougherty | 75c66da | 2010-03-25 16:33:33 -0700 | [diff] [blame] | 4457 | * {@link #WRAP_CONTENT}, or {@link #FILL_PARENT} (replaced by |
| 4458 | * {@link #MATCH_PARENT} in API Level 8)</li> |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 4459 | * <li><code>layout_height</code>: the height, either an exact value, |
Dirk Dougherty | 75c66da | 2010-03-25 16:33:33 -0700 | [diff] [blame] | 4460 | * {@link #WRAP_CONTENT}, or {@link #FILL_PARENT} (replaced by |
| 4461 | * {@link #MATCH_PARENT} in API Level 8)</li> |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 4462 | * </ul> |
| 4463 | * |
| 4464 | * @param c the application environment |
| 4465 | * @param attrs the set of attributes from which to extract the layout |
| 4466 | * parameters' values |
| 4467 | */ |
| 4468 | public LayoutParams(Context c, AttributeSet attrs) { |
| 4469 | TypedArray a = c.obtainStyledAttributes(attrs, R.styleable.ViewGroup_Layout); |
| 4470 | setBaseAttributes(a, |
| 4471 | R.styleable.ViewGroup_Layout_layout_width, |
| 4472 | R.styleable.ViewGroup_Layout_layout_height); |
| 4473 | a.recycle(); |
| 4474 | } |
| 4475 | |
| 4476 | /** |
| 4477 | * Creates a new set of layout parameters with the specified width |
| 4478 | * and height. |
| 4479 | * |
Dirk Dougherty | 75c66da | 2010-03-25 16:33:33 -0700 | [diff] [blame] | 4480 | * @param width the width, either {@link #WRAP_CONTENT}, |
| 4481 | * {@link #FILL_PARENT} (replaced by {@link #MATCH_PARENT} in |
| 4482 | * API Level 8), or a fixed size in pixels |
| 4483 | * @param height the height, either {@link #WRAP_CONTENT}, |
| 4484 | * {@link #FILL_PARENT} (replaced by {@link #MATCH_PARENT} in |
| 4485 | * API Level 8), or a fixed size in pixels |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 4486 | */ |
| 4487 | public LayoutParams(int width, int height) { |
| 4488 | this.width = width; |
| 4489 | this.height = height; |
| 4490 | } |
| 4491 | |
| 4492 | /** |
| 4493 | * Copy constructor. Clones the width and height values of the source. |
| 4494 | * |
| 4495 | * @param source The layout params to copy from. |
| 4496 | */ |
| 4497 | public LayoutParams(LayoutParams source) { |
| 4498 | this.width = source.width; |
| 4499 | this.height = source.height; |
| 4500 | } |
| 4501 | |
| 4502 | /** |
| 4503 | * Used internally by MarginLayoutParams. |
| 4504 | * @hide |
| 4505 | */ |
| 4506 | LayoutParams() { |
| 4507 | } |
| 4508 | |
| 4509 | /** |
| 4510 | * Extracts the layout parameters from the supplied attributes. |
| 4511 | * |
| 4512 | * @param a the style attributes to extract the parameters from |
| 4513 | * @param widthAttr the identifier of the width attribute |
| 4514 | * @param heightAttr the identifier of the height attribute |
| 4515 | */ |
| 4516 | protected void setBaseAttributes(TypedArray a, int widthAttr, int heightAttr) { |
| 4517 | width = a.getLayoutDimension(widthAttr, "layout_width"); |
| 4518 | height = a.getLayoutDimension(heightAttr, "layout_height"); |
| 4519 | } |
| 4520 | |
| 4521 | /** |
| 4522 | * Returns a String representation of this set of layout parameters. |
| 4523 | * |
| 4524 | * @param output the String to prepend to the internal representation |
| 4525 | * @return a String with the following format: output + |
| 4526 | * "ViewGroup.LayoutParams={ width=WIDTH, height=HEIGHT }" |
Romain Guy | 8506ab4 | 2009-06-11 17:35:47 -0700 | [diff] [blame] | 4527 | * |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 4528 | * @hide |
| 4529 | */ |
| 4530 | public String debug(String output) { |
| 4531 | return output + "ViewGroup.LayoutParams={ width=" |
| 4532 | + sizeToString(width) + ", height=" + sizeToString(height) + " }"; |
| 4533 | } |
| 4534 | |
| 4535 | /** |
| 4536 | * Converts the specified size to a readable String. |
| 4537 | * |
| 4538 | * @param size the size to convert |
| 4539 | * @return a String instance representing the supplied size |
Romain Guy | 8506ab4 | 2009-06-11 17:35:47 -0700 | [diff] [blame] | 4540 | * |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 4541 | * @hide |
| 4542 | */ |
| 4543 | protected static String sizeToString(int size) { |
| 4544 | if (size == WRAP_CONTENT) { |
| 4545 | return "wrap-content"; |
| 4546 | } |
Romain Guy | 980a938 | 2010-01-08 15:06:28 -0800 | [diff] [blame] | 4547 | if (size == MATCH_PARENT) { |
| 4548 | return "match-parent"; |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 4549 | } |
| 4550 | return String.valueOf(size); |
| 4551 | } |
| 4552 | } |
| 4553 | |
| 4554 | /** |
| 4555 | * Per-child layout information for layouts that support margins. |
| 4556 | * See |
| 4557 | * {@link android.R.styleable#ViewGroup_MarginLayout ViewGroup Margin Layout Attributes} |
| 4558 | * for a list of all child view attributes that this class supports. |
| 4559 | */ |
| 4560 | public static class MarginLayoutParams extends ViewGroup.LayoutParams { |
| 4561 | /** |
| 4562 | * The left margin in pixels of the child. |
| 4563 | */ |
Konstantin Lopyrev | bea9516 | 2010-08-10 17:02:18 -0700 | [diff] [blame] | 4564 | @ViewDebug.ExportedProperty(category = "layout") |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 4565 | public int leftMargin; |
| 4566 | |
| 4567 | /** |
| 4568 | * The top margin in pixels of the child. |
| 4569 | */ |
Konstantin Lopyrev | bea9516 | 2010-08-10 17:02:18 -0700 | [diff] [blame] | 4570 | @ViewDebug.ExportedProperty(category = "layout") |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 4571 | public int topMargin; |
| 4572 | |
| 4573 | /** |
| 4574 | * The right margin in pixels of the child. |
| 4575 | */ |
Konstantin Lopyrev | bea9516 | 2010-08-10 17:02:18 -0700 | [diff] [blame] | 4576 | @ViewDebug.ExportedProperty(category = "layout") |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 4577 | public int rightMargin; |
| 4578 | |
| 4579 | /** |
| 4580 | * The bottom margin in pixels of the child. |
| 4581 | */ |
Konstantin Lopyrev | bea9516 | 2010-08-10 17:02:18 -0700 | [diff] [blame] | 4582 | @ViewDebug.ExportedProperty(category = "layout") |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 4583 | public int bottomMargin; |
| 4584 | |
| 4585 | /** |
| 4586 | * Creates a new set of layout parameters. The values are extracted from |
| 4587 | * the supplied attributes set and context. |
| 4588 | * |
| 4589 | * @param c the application environment |
| 4590 | * @param attrs the set of attributes from which to extract the layout |
| 4591 | * parameters' values |
| 4592 | */ |
| 4593 | public MarginLayoutParams(Context c, AttributeSet attrs) { |
| 4594 | super(); |
| 4595 | |
| 4596 | TypedArray a = c.obtainStyledAttributes(attrs, R.styleable.ViewGroup_MarginLayout); |
| 4597 | setBaseAttributes(a, |
| 4598 | R.styleable.ViewGroup_MarginLayout_layout_width, |
| 4599 | R.styleable.ViewGroup_MarginLayout_layout_height); |
| 4600 | |
| 4601 | int margin = a.getDimensionPixelSize( |
| 4602 | com.android.internal.R.styleable.ViewGroup_MarginLayout_layout_margin, -1); |
| 4603 | if (margin >= 0) { |
| 4604 | leftMargin = margin; |
| 4605 | topMargin = margin; |
| 4606 | rightMargin= margin; |
| 4607 | bottomMargin = margin; |
| 4608 | } else { |
| 4609 | leftMargin = a.getDimensionPixelSize( |
| 4610 | R.styleable.ViewGroup_MarginLayout_layout_marginLeft, 0); |
| 4611 | topMargin = a.getDimensionPixelSize( |
| 4612 | R.styleable.ViewGroup_MarginLayout_layout_marginTop, 0); |
| 4613 | rightMargin = a.getDimensionPixelSize( |
| 4614 | R.styleable.ViewGroup_MarginLayout_layout_marginRight, 0); |
| 4615 | bottomMargin = a.getDimensionPixelSize( |
| 4616 | R.styleable.ViewGroup_MarginLayout_layout_marginBottom, 0); |
| 4617 | } |
| 4618 | |
| 4619 | a.recycle(); |
| 4620 | } |
| 4621 | |
| 4622 | /** |
| 4623 | * {@inheritDoc} |
| 4624 | */ |
| 4625 | public MarginLayoutParams(int width, int height) { |
| 4626 | super(width, height); |
| 4627 | } |
| 4628 | |
| 4629 | /** |
| 4630 | * Copy constructor. Clones the width, height and margin values of the source. |
| 4631 | * |
| 4632 | * @param source The layout params to copy from. |
| 4633 | */ |
| 4634 | public MarginLayoutParams(MarginLayoutParams source) { |
| 4635 | this.width = source.width; |
| 4636 | this.height = source.height; |
| 4637 | |
| 4638 | this.leftMargin = source.leftMargin; |
| 4639 | this.topMargin = source.topMargin; |
| 4640 | this.rightMargin = source.rightMargin; |
| 4641 | this.bottomMargin = source.bottomMargin; |
| 4642 | } |
| 4643 | |
| 4644 | /** |
| 4645 | * {@inheritDoc} |
| 4646 | */ |
| 4647 | public MarginLayoutParams(LayoutParams source) { |
| 4648 | super(source); |
| 4649 | } |
| 4650 | |
| 4651 | /** |
| 4652 | * Sets the margins, in pixels. |
| 4653 | * |
| 4654 | * @param left the left margin size |
| 4655 | * @param top the top margin size |
| 4656 | * @param right the right margin size |
| 4657 | * @param bottom the bottom margin size |
| 4658 | * |
| 4659 | * @attr ref android.R.styleable#ViewGroup_MarginLayout_layout_marginLeft |
| 4660 | * @attr ref android.R.styleable#ViewGroup_MarginLayout_layout_marginTop |
| 4661 | * @attr ref android.R.styleable#ViewGroup_MarginLayout_layout_marginRight |
| 4662 | * @attr ref android.R.styleable#ViewGroup_MarginLayout_layout_marginBottom |
| 4663 | */ |
| 4664 | public void setMargins(int left, int top, int right, int bottom) { |
| 4665 | leftMargin = left; |
| 4666 | topMargin = top; |
| 4667 | rightMargin = right; |
| 4668 | bottomMargin = bottom; |
| 4669 | } |
| 4670 | } |
Adam Powell | 2b342f0 | 2010-08-18 18:14:13 -0700 | [diff] [blame] | 4671 | |
Jeff Brown | 20e987b | 2010-08-23 12:01:02 -0700 | [diff] [blame] | 4672 | /* Describes a touched view and the ids of the pointers that it has captured. |
| 4673 | * |
| 4674 | * This code assumes that pointer ids are always in the range 0..31 such that |
| 4675 | * it can use a bitfield to track which pointer ids are present. |
| 4676 | * As it happens, the lower layers of the input dispatch pipeline also use the |
| 4677 | * same trick so the assumption should be safe here... |
| 4678 | */ |
| 4679 | private static final class TouchTarget { |
| 4680 | private static final int MAX_RECYCLED = 32; |
| 4681 | private static final Object sRecycleLock = new Object(); |
| 4682 | private static TouchTarget sRecycleBin; |
| 4683 | private static int sRecycledCount; |
Adam Powell | 2b342f0 | 2010-08-18 18:14:13 -0700 | [diff] [blame] | 4684 | |
Jeff Brown | 20e987b | 2010-08-23 12:01:02 -0700 | [diff] [blame] | 4685 | public static final int ALL_POINTER_IDS = -1; // all ones |
Adam Powell | 2b342f0 | 2010-08-18 18:14:13 -0700 | [diff] [blame] | 4686 | |
Jeff Brown | 20e987b | 2010-08-23 12:01:02 -0700 | [diff] [blame] | 4687 | // The touched child view. |
| 4688 | public View child; |
| 4689 | |
| 4690 | // The combined bit mask of pointer ids for all pointers captured by the target. |
| 4691 | public int pointerIdBits; |
| 4692 | |
| 4693 | // The next target in the target list. |
| 4694 | public TouchTarget next; |
| 4695 | |
| 4696 | private TouchTarget() { |
Adam Powell | 2b342f0 | 2010-08-18 18:14:13 -0700 | [diff] [blame] | 4697 | } |
| 4698 | |
Jeff Brown | 20e987b | 2010-08-23 12:01:02 -0700 | [diff] [blame] | 4699 | public static TouchTarget obtain(View child, int pointerIdBits) { |
| 4700 | final TouchTarget target; |
| 4701 | synchronized (sRecycleLock) { |
Adam Powell | 816c3be | 2010-08-23 18:00:05 -0700 | [diff] [blame] | 4702 | if (sRecycleBin == null) { |
Jeff Brown | 20e987b | 2010-08-23 12:01:02 -0700 | [diff] [blame] | 4703 | target = new TouchTarget(); |
Adam Powell | 816c3be | 2010-08-23 18:00:05 -0700 | [diff] [blame] | 4704 | } else { |
Jeff Brown | 20e987b | 2010-08-23 12:01:02 -0700 | [diff] [blame] | 4705 | target = sRecycleBin; |
| 4706 | sRecycleBin = target.next; |
| 4707 | sRecycledCount--; |
| 4708 | target.next = null; |
Adam Powell | 816c3be | 2010-08-23 18:00:05 -0700 | [diff] [blame] | 4709 | } |
Adam Powell | 816c3be | 2010-08-23 18:00:05 -0700 | [diff] [blame] | 4710 | } |
Jeff Brown | 20e987b | 2010-08-23 12:01:02 -0700 | [diff] [blame] | 4711 | target.child = child; |
| 4712 | target.pointerIdBits = pointerIdBits; |
| 4713 | return target; |
| 4714 | } |
Adam Powell | 816c3be | 2010-08-23 18:00:05 -0700 | [diff] [blame] | 4715 | |
Jeff Brown | 20e987b | 2010-08-23 12:01:02 -0700 | [diff] [blame] | 4716 | public void recycle() { |
| 4717 | synchronized (sRecycleLock) { |
| 4718 | if (sRecycledCount < MAX_RECYCLED) { |
| 4719 | next = sRecycleBin; |
| 4720 | sRecycleBin = this; |
| 4721 | sRecycledCount += 1; |
Patrick Dubroy | fb0547d | 2010-10-19 17:36:18 -0700 | [diff] [blame] | 4722 | } else { |
| 4723 | next = null; |
Adam Powell | 816c3be | 2010-08-23 18:00:05 -0700 | [diff] [blame] | 4724 | } |
Patrick Dubroy | fb0547d | 2010-10-19 17:36:18 -0700 | [diff] [blame] | 4725 | child = null; |
Adam Powell | 816c3be | 2010-08-23 18:00:05 -0700 | [diff] [blame] | 4726 | } |
| 4727 | } |
Adam Powell | 2b342f0 | 2010-08-18 18:14:13 -0700 | [diff] [blame] | 4728 | } |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 4729 | } |