Workspace.java revision 9c1289cb3bfb74f86e53ec7ac6dd76bb39666b2d
1/* 2 * Copyright (C) 2008 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 17package com.android.launcher2; 18 19import android.app.WallpaperManager; 20import android.content.Context; 21import android.content.Intent; 22import android.content.ComponentName; 23import android.content.res.TypedArray; 24import android.content.pm.PackageManager; 25import android.graphics.Canvas; 26import android.graphics.RectF; 27import android.graphics.Rect; 28import android.graphics.drawable.Drawable; 29import android.util.AttributeSet; 30import android.util.Log; 31import android.view.MotionEvent; 32import android.view.VelocityTracker; 33import android.view.View; 34import android.view.ViewConfiguration; 35import android.view.ViewGroup; 36import android.view.ViewParent; 37import android.widget.Scroller; 38import android.widget.TextView; 39import android.os.Parcelable; 40import android.os.Parcel; 41 42import java.util.ArrayList; 43 44/** 45 * The workspace is a wide area with a wallpaper and a finite number of screens. Each 46 * screen contains a number of icons, folders or widgets the user can interact with. 47 * A workspace is meant to be used with a fixed width only. 48 */ 49public class Workspace extends ViewGroup implements DropTarget, DragSource, DragScroller, 50 TweenCallback { 51 private static final int INVALID_SCREEN = -1; 52 53 /** 54 * The velocity at which a fling gesture will cause us to snap to the next screen 55 */ 56 private static final int SNAP_VELOCITY = 1000; 57 58 private final WallpaperManager mWallpaperManager; 59 60 private int mDefaultScreen; 61 62 private boolean mFirstLayout = true; 63 64 private int mCurrentScreen; 65 private int mNextScreen = INVALID_SCREEN; 66 private Scroller mScroller; 67 private VelocityTracker mVelocityTracker; 68 69 private SymmetricalLinearTween mTween; 70 private int mAlpha = 255; 71 72 /** 73 * CellInfo for the cell that is currently being dragged 74 */ 75 private CellLayout.CellInfo mDragInfo; 76 77 /** 78 * Target drop area calculated during last acceptDrop call. 79 */ 80 private int[] mTargetCell = null; 81 82 private float mLastMotionX; 83 private float mLastMotionY; 84 85 private final static int TOUCH_STATE_REST = 0; 86 private final static int TOUCH_STATE_SCROLLING = 1; 87 88 private int mTouchState = TOUCH_STATE_REST; 89 90 private OnLongClickListener mLongClickListener; 91 92 private Launcher mLauncher; 93 private DragController mDragController; 94 95 /** 96 * Cache of vacant cells, used during drag events and invalidated as needed. 97 */ 98 private CellLayout.CellInfo mVacantCache = null; 99 100 private int[] mTempCell = new int[2]; 101 private int[] mTempEstimate = new int[2]; 102 103 private boolean mAllowLongPress; 104 105 private int mTouchSlop; 106 private int mMaximumVelocity; 107 108 final Rect mDrawerBounds = new Rect(); 109 final Rect mClipBounds = new Rect(); 110 int mDrawerContentHeight; 111 int mDrawerContentWidth; 112 113 /** 114 * Used to inflate the Workspace from XML. 115 * 116 * @param context The application's context. 117 * @param attrs The attribtues set containing the Workspace's customization values. 118 */ 119 public Workspace(Context context, AttributeSet attrs) { 120 this(context, attrs, 0); 121 } 122 123 /** 124 * Used to inflate the Workspace from XML. 125 * 126 * @param context The application's context. 127 * @param attrs The attribtues set containing the Workspace's customization values. 128 * @param defStyle Unused. 129 */ 130 public Workspace(Context context, AttributeSet attrs, int defStyle) { 131 super(context, attrs, defStyle); 132 133 mWallpaperManager = WallpaperManager.getInstance(context); 134 135 TypedArray a = context.obtainStyledAttributes(attrs, R.styleable.Workspace, defStyle, 0); 136 mDefaultScreen = a.getInt(R.styleable.Workspace_defaultScreen, 1); 137 a.recycle(); 138 139 initWorkspace(); 140 } 141 142 /** 143 * Initializes various states for this workspace. 144 */ 145 private void initWorkspace() { 146 mScroller = new Scroller(getContext()); 147 mCurrentScreen = mDefaultScreen; 148 Launcher.setScreen(mCurrentScreen); 149 150 final ViewConfiguration configuration = ViewConfiguration.get(getContext()); 151 mTouchSlop = configuration.getScaledTouchSlop(); 152 mMaximumVelocity = configuration.getScaledMaximumFlingVelocity(); 153 154 mTween = new SymmetricalLinearTween(true, 250/*ms*/, this); 155 } 156 157 @Override 158 public void addView(View child, int index, LayoutParams params) { 159 if (!(child instanceof CellLayout)) { 160 throw new IllegalArgumentException("A Workspace can only have CellLayout children."); 161 } 162 super.addView(child, index, params); 163 } 164 165 @Override 166 public void addView(View child) { 167 if (!(child instanceof CellLayout)) { 168 throw new IllegalArgumentException("A Workspace can only have CellLayout children."); 169 } 170 super.addView(child); 171 } 172 173 @Override 174 public void addView(View child, int index) { 175 if (!(child instanceof CellLayout)) { 176 throw new IllegalArgumentException("A Workspace can only have CellLayout children."); 177 } 178 super.addView(child, index); 179 } 180 181 @Override 182 public void addView(View child, int width, int height) { 183 if (!(child instanceof CellLayout)) { 184 throw new IllegalArgumentException("A Workspace can only have CellLayout children."); 185 } 186 super.addView(child, width, height); 187 } 188 189 @Override 190 public void addView(View child, LayoutParams params) { 191 if (!(child instanceof CellLayout)) { 192 throw new IllegalArgumentException("A Workspace can only have CellLayout children."); 193 } 194 super.addView(child, params); 195 } 196 197 /** 198 * @return The open folder on the current screen, or null if there is none 199 */ 200 Folder getOpenFolder() { 201 CellLayout currentScreen = (CellLayout) getChildAt(mCurrentScreen); 202 int count = currentScreen.getChildCount(); 203 for (int i = 0; i < count; i++) { 204 View child = currentScreen.getChildAt(i); 205 CellLayout.LayoutParams lp = (CellLayout.LayoutParams) child.getLayoutParams(); 206 if (lp.cellHSpan == 4 && lp.cellVSpan == 4 && child instanceof Folder) { 207 return (Folder) child; 208 } 209 } 210 return null; 211 } 212 213 ArrayList<Folder> getOpenFolders() { 214 final int screens = getChildCount(); 215 ArrayList<Folder> folders = new ArrayList<Folder>(screens); 216 217 for (int screen = 0; screen < screens; screen++) { 218 CellLayout currentScreen = (CellLayout) getChildAt(screen); 219 int count = currentScreen.getChildCount(); 220 for (int i = 0; i < count; i++) { 221 View child = currentScreen.getChildAt(i); 222 CellLayout.LayoutParams lp = (CellLayout.LayoutParams) child.getLayoutParams(); 223 if (lp.cellHSpan == 4 && lp.cellVSpan == 4 && child instanceof Folder) { 224 folders.add((Folder) child); 225 break; 226 } 227 } 228 } 229 230 return folders; 231 } 232 233 boolean isDefaultScreenShowing() { 234 return mCurrentScreen == mDefaultScreen; 235 } 236 237 /** 238 * Returns the index of the currently displayed screen. 239 * 240 * @return The index of the currently displayed screen. 241 */ 242 int getCurrentScreen() { 243 return mCurrentScreen; 244 } 245 246 /** 247 * Returns how many screens there are. 248 */ 249 int getScreenCount() { 250 return getChildCount(); 251 } 252 253 /** 254 * Computes a bounding rectangle for a range of cells 255 * 256 * @param cellX X coordinate of upper left corner expressed as a cell position 257 * @param cellY Y coordinate of upper left corner expressed as a cell position 258 * @param cellHSpan Width in cells 259 * @param cellVSpan Height in cells 260 * @param rect Rectnagle into which to put the results 261 */ 262 public void cellToRect(int cellX, int cellY, int cellHSpan, int cellVSpan, RectF rect) { 263 ((CellLayout)getChildAt(mCurrentScreen)).cellToRect(cellX, cellY, 264 cellHSpan, cellVSpan, rect); 265 } 266 267 /** 268 * Sets the current screen. 269 * 270 * @param currentScreen 271 */ 272 void setCurrentScreen(int currentScreen) { 273 clearVacantCache(); 274 mCurrentScreen = Math.max(0, Math.min(currentScreen, getChildCount() - 1)); 275 scrollTo(mCurrentScreen * getWidth(), 0); 276 updateWallpaperOffset(); 277 invalidate(); 278 } 279 280 /** 281 * Shows the default screen (defined by the firstScreen attribute in XML.) 282 */ 283 void showDefaultScreen() { 284 setCurrentScreen(mDefaultScreen); 285 } 286 287 /** 288 * Adds the specified child in the current screen. The position and dimension of 289 * the child are defined by x, y, spanX and spanY. 290 * 291 * @param child The child to add in one of the workspace's screens. 292 * @param x The X position of the child in the screen's grid. 293 * @param y The Y position of the child in the screen's grid. 294 * @param spanX The number of cells spanned horizontally by the child. 295 * @param spanY The number of cells spanned vertically by the child. 296 */ 297 void addInCurrentScreen(View child, int x, int y, int spanX, int spanY) { 298 addInScreen(child, mCurrentScreen, x, y, spanX, spanY, false); 299 } 300 301 /** 302 * Adds the specified child in the current screen. The position and dimension of 303 * the child are defined by x, y, spanX and spanY. 304 * 305 * @param child The child to add in one of the workspace's screens. 306 * @param x The X position of the child in the screen's grid. 307 * @param y The Y position of the child in the screen's grid. 308 * @param spanX The number of cells spanned horizontally by the child. 309 * @param spanY The number of cells spanned vertically by the child. 310 * @param insert When true, the child is inserted at the beginning of the children list. 311 */ 312 void addInCurrentScreen(View child, int x, int y, int spanX, int spanY, boolean insert) { 313 addInScreen(child, mCurrentScreen, x, y, spanX, spanY, insert); 314 } 315 316 /** 317 * Adds the specified child in the specified screen. The position and dimension of 318 * the child are defined by x, y, spanX and spanY. 319 * 320 * @param child The child to add in one of the workspace's screens. 321 * @param screen The screen in which to add the child. 322 * @param x The X position of the child in the screen's grid. 323 * @param y The Y position of the child in the screen's grid. 324 * @param spanX The number of cells spanned horizontally by the child. 325 * @param spanY The number of cells spanned vertically by the child. 326 */ 327 void addInScreen(View child, int screen, int x, int y, int spanX, int spanY) { 328 addInScreen(child, screen, x, y, spanX, spanY, false); 329 } 330 331 /** 332 * Adds the specified child in the specified screen. The position and dimension of 333 * the child are defined by x, y, spanX and spanY. 334 * 335 * @param child The child to add in one of the workspace's screens. 336 * @param screen The screen in which to add the child. 337 * @param x The X position of the child in the screen's grid. 338 * @param y The Y position of the child in the screen's grid. 339 * @param spanX The number of cells spanned horizontally by the child. 340 * @param spanY The number of cells spanned vertically by the child. 341 * @param insert When true, the child is inserted at the beginning of the children list. 342 */ 343 void addInScreen(View child, int screen, int x, int y, int spanX, int spanY, boolean insert) { 344 if (screen < 0 || screen >= getChildCount()) { 345 throw new IllegalStateException("The screen must be >= 0 and < " + getChildCount()); 346 } 347 348 clearVacantCache(); 349 350 final CellLayout group = (CellLayout) getChildAt(screen); 351 CellLayout.LayoutParams lp = (CellLayout.LayoutParams) child.getLayoutParams(); 352 if (lp == null) { 353 lp = new CellLayout.LayoutParams(x, y, spanX, spanY); 354 } else { 355 lp.cellX = x; 356 lp.cellY = y; 357 lp.cellHSpan = spanX; 358 lp.cellVSpan = spanY; 359 } 360 group.addView(child, insert ? 0 : -1, lp); 361 if (!(child instanceof Folder)) { 362 child.setOnLongClickListener(mLongClickListener); 363 } 364 if (child instanceof DropTarget) { 365 mDragController.addDropTarget((DropTarget)child); 366 } 367 } 368 369 void addWidget(View view, Widget widget) { 370 addInScreen(view, widget.screen, widget.cellX, widget.cellY, widget.spanX, 371 widget.spanY, false); 372 } 373 374 void addWidget(View view, Widget widget, boolean insert) { 375 addInScreen(view, widget.screen, widget.cellX, widget.cellY, widget.spanX, 376 widget.spanY, insert); 377 } 378 379 CellLayout.CellInfo findAllVacantCells(boolean[] occupied) { 380 CellLayout group = (CellLayout) getChildAt(mCurrentScreen); 381 if (group != null) { 382 return group.findAllVacantCells(occupied, null); 383 } 384 return null; 385 } 386 387 private void clearVacantCache() { 388 if (mVacantCache != null) { 389 mVacantCache.clearVacantCells(); 390 mVacantCache = null; 391 } 392 } 393 394 /** 395 * Returns the coordinate of a vacant cell for the current screen. 396 */ 397 boolean getVacantCell(int[] vacant, int spanX, int spanY) { 398 CellLayout group = (CellLayout) getChildAt(mCurrentScreen); 399 if (group != null) { 400 return group.getVacantCell(vacant, spanX, spanY); 401 } 402 return false; 403 } 404 405 /** 406 * Adds the specified child in the current screen. The position and dimension of 407 * the child are defined by x, y, spanX and spanY. 408 * 409 * @param child The child to add in one of the workspace's screens. 410 * @param spanX The number of cells spanned horizontally by the child. 411 * @param spanY The number of cells spanned vertically by the child. 412 */ 413 void fitInCurrentScreen(View child, int spanX, int spanY) { 414 fitInScreen(child, mCurrentScreen, spanX, spanY); 415 } 416 417 /** 418 * Adds the specified child in the specified screen. The position and dimension of 419 * the child are defined by x, y, spanX and spanY. 420 * 421 * @param child The child to add in one of the workspace's screens. 422 * @param screen The screen in which to add the child. 423 * @param spanX The number of cells spanned horizontally by the child. 424 * @param spanY The number of cells spanned vertically by the child. 425 */ 426 void fitInScreen(View child, int screen, int spanX, int spanY) { 427 if (screen < 0 || screen >= getChildCount()) { 428 throw new IllegalStateException("The screen must be >= 0 and < " + getChildCount()); 429 } 430 431 final CellLayout group = (CellLayout) getChildAt(screen); 432 boolean vacant = group.getVacantCell(mTempCell, spanX, spanY); 433 if (vacant) { 434 group.addView(child, 435 new CellLayout.LayoutParams(mTempCell[0], mTempCell[1], spanX, spanY)); 436 child.setOnLongClickListener(mLongClickListener); 437 if (!(child instanceof Folder)) { 438 child.setOnLongClickListener(mLongClickListener); 439 } 440 if (child instanceof DropTarget) { 441 mDragController.addDropTarget((DropTarget)child); 442 } 443 } 444 } 445 446 /** 447 * Registers the specified listener on each screen contained in this workspace. 448 * 449 * @param l The listener used to respond to long clicks. 450 */ 451 @Override 452 public void setOnLongClickListener(OnLongClickListener l) { 453 mLongClickListener = l; 454 final int count = getChildCount(); 455 for (int i = 0; i < count; i++) { 456 getChildAt(i).setOnLongClickListener(l); 457 } 458 } 459 460 private void updateWallpaperOffset() { 461 updateWallpaperOffset(getChildAt(getChildCount() - 1).getRight() - (mRight - mLeft)); 462 } 463 464 private void updateWallpaperOffset(int scrollRange) { 465 mWallpaperManager.setWallpaperOffsets(getWindowToken(), mScrollX / (float) scrollRange, 0); 466 } 467 468 @Override 469 public void computeScroll() { 470 if (mScroller.computeScrollOffset()) { 471 mScrollX = mScroller.getCurrX(); 472 mScrollY = mScroller.getCurrY(); 473 updateWallpaperOffset(); 474 postInvalidate(); 475 } else if (mNextScreen != INVALID_SCREEN) { 476 mCurrentScreen = Math.max(0, Math.min(mNextScreen, getChildCount() - 1)); 477 Launcher.setScreen(mCurrentScreen); 478 mNextScreen = INVALID_SCREEN; 479 clearChildrenCache(); 480 } 481 } 482 483 @Override 484 protected void dispatchDraw(Canvas canvas) { 485 boolean restore = false; 486 int restoreCount = 0; 487 488 // For the fade. If view gets setAlpha(), use that instead. 489 int alpha = mAlpha; 490 if (alpha < 255) { 491 int sx = mScrollX; 492 restoreCount = canvas.saveLayerAlpha(sx, 0, sx+getWidth(), getHeight(), alpha, 493 Canvas.HAS_ALPHA_LAYER_SAVE_FLAG | Canvas.CLIP_TO_LAYER_SAVE_FLAG); 494 restore = true; 495 } 496 497 // ViewGroup.dispatchDraw() supports many features we don't need: 498 // clip to padding, layout animation, animation listener, disappearing 499 // children, etc. The following implementation attempts to fast-track 500 // the drawing dispatch by drawing only what we know needs to be drawn. 501 502 boolean fastDraw = mTouchState != TOUCH_STATE_SCROLLING && mNextScreen == INVALID_SCREEN; 503 // If we are not scrolling or flinging, draw only the current screen 504 if (fastDraw) { 505 drawChild(canvas, getChildAt(mCurrentScreen), getDrawingTime()); 506 } else { 507 final long drawingTime = getDrawingTime(); 508 // If we are flinging, draw only the current screen and the target screen 509 if (mNextScreen >= 0 && mNextScreen < getChildCount() && 510 Math.abs(mCurrentScreen - mNextScreen) == 1) { 511 drawChild(canvas, getChildAt(mCurrentScreen), drawingTime); 512 drawChild(canvas, getChildAt(mNextScreen), drawingTime); 513 } else { 514 // If we are scrolling, draw all of our children 515 final int count = getChildCount(); 516 for (int i = 0; i < count; i++) { 517 drawChild(canvas, getChildAt(i), drawingTime); 518 } 519 } 520 } 521 522 if (restore) { 523 canvas.restoreToCount(restoreCount); 524 } 525 } 526 527 protected void onAttachedToWindow() { 528 super.onAttachedToWindow(); 529 mDragController.setWindowToken(getWindowToken()); 530 } 531 532 @Override 533 protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { 534 super.onMeasure(widthMeasureSpec, heightMeasureSpec); 535 536 final int width = MeasureSpec.getSize(widthMeasureSpec); 537 final int widthMode = MeasureSpec.getMode(widthMeasureSpec); 538 if (widthMode != MeasureSpec.EXACTLY) { 539 throw new IllegalStateException("Workspace can only be used in EXACTLY mode."); 540 } 541 542 final int heightMode = MeasureSpec.getMode(heightMeasureSpec); 543 if (heightMode != MeasureSpec.EXACTLY) { 544 throw new IllegalStateException("Workspace can only be used in EXACTLY mode."); 545 } 546 547 // The children are given the same width and height as the workspace 548 final int count = getChildCount(); 549 for (int i = 0; i < count; i++) { 550 getChildAt(i).measure(widthMeasureSpec, heightMeasureSpec); 551 } 552 553 if (mFirstLayout) { 554 scrollTo(mCurrentScreen * width, 0); 555 updateWallpaperOffset(width * (getChildCount() - 1)); 556 mFirstLayout = false; 557 } 558 } 559 560 @Override 561 protected void onLayout(boolean changed, int left, int top, int right, int bottom) { 562 int childLeft = 0; 563 564 final int count = getChildCount(); 565 for (int i = 0; i < count; i++) { 566 final View child = getChildAt(i); 567 if (child.getVisibility() != View.GONE) { 568 final int childWidth = child.getMeasuredWidth(); 569 child.layout(childLeft, 0, childLeft + childWidth, child.getMeasuredHeight()); 570 childLeft += childWidth; 571 } 572 } 573 } 574 575 @Override 576 public boolean requestChildRectangleOnScreen(View child, Rect rectangle, boolean immediate) { 577 int screen = indexOfChild(child); 578 if (screen != mCurrentScreen || !mScroller.isFinished()) { 579 if (!mLauncher.isWorkspaceLocked()) { 580 snapToScreen(screen); 581 } 582 return true; 583 } 584 return false; 585 } 586 587 @Override 588 protected boolean onRequestFocusInDescendants(int direction, Rect previouslyFocusedRect) { 589 if (mLauncher.isDrawerDown()) { 590 final Folder openFolder = getOpenFolder(); 591 if (openFolder != null) { 592 return openFolder.requestFocus(direction, previouslyFocusedRect); 593 } else { 594 int focusableScreen; 595 if (mNextScreen != INVALID_SCREEN) { 596 focusableScreen = mNextScreen; 597 } else { 598 focusableScreen = mCurrentScreen; 599 } 600 getChildAt(focusableScreen).requestFocus(direction, previouslyFocusedRect); 601 } 602 } 603 return false; 604 } 605 606 @Override 607 public boolean dispatchUnhandledMove(View focused, int direction) { 608 if (direction == View.FOCUS_LEFT) { 609 if (getCurrentScreen() > 0) { 610 snapToScreen(getCurrentScreen() - 1); 611 return true; 612 } 613 } else if (direction == View.FOCUS_RIGHT) { 614 if (getCurrentScreen() < getChildCount() - 1) { 615 snapToScreen(getCurrentScreen() + 1); 616 return true; 617 } 618 } 619 return super.dispatchUnhandledMove(focused, direction); 620 } 621 622 @Override 623 public void addFocusables(ArrayList<View> views, int direction, int focusableMode) { 624 if (mLauncher.isDrawerDown()) { 625 final Folder openFolder = getOpenFolder(); 626 if (openFolder == null) { 627 getChildAt(mCurrentScreen).addFocusables(views, direction); 628 if (direction == View.FOCUS_LEFT) { 629 if (mCurrentScreen > 0) { 630 getChildAt(mCurrentScreen - 1).addFocusables(views, direction); 631 } 632 } else if (direction == View.FOCUS_RIGHT){ 633 if (mCurrentScreen < getChildCount() - 1) { 634 getChildAt(mCurrentScreen + 1).addFocusables(views, direction); 635 } 636 } 637 } else { 638 openFolder.addFocusables(views, direction); 639 } 640 } 641 } 642 643 @Override 644 public boolean onInterceptTouchEvent(MotionEvent ev) { 645 if (mLauncher.isWorkspaceLocked() || !mLauncher.isDrawerDown()) { 646 return false; // We don't want the events. Let them fall through to the all apps view. 647 } 648 649 /* 650 * This method JUST determines whether we want to intercept the motion. 651 * If we return true, onTouchEvent will be called and we do the actual 652 * scrolling there. 653 */ 654 655 /* 656 * Shortcut the most recurring case: the user is in the dragging 657 * state and he is moving his finger. We want to intercept this 658 * motion. 659 */ 660 final int action = ev.getAction(); 661 if ((action == MotionEvent.ACTION_MOVE) && (mTouchState != TOUCH_STATE_REST)) { 662 return true; 663 } 664 665 final float x = ev.getX(); 666 final float y = ev.getY(); 667 668 switch (action) { 669 case MotionEvent.ACTION_MOVE: 670 /* 671 * mIsBeingDragged == false, otherwise the shortcut would have caught it. Check 672 * whether the user has moved far enough from his original down touch. 673 */ 674 675 /* 676 * Locally do absolute value. mLastMotionX is set to the y value 677 * of the down event. 678 */ 679 final int xDiff = (int) Math.abs(x - mLastMotionX); 680 final int yDiff = (int) Math.abs(y - mLastMotionY); 681 682 final int touchSlop = mTouchSlop; 683 boolean xMoved = xDiff > touchSlop; 684 boolean yMoved = yDiff > touchSlop; 685 686 if (xMoved || yMoved) { 687 688 if (xMoved) { 689 // Scroll if the user moved far enough along the X axis 690 mTouchState = TOUCH_STATE_SCROLLING; 691 enableChildrenCache(); 692 } 693 // Either way, cancel any pending longpress 694 if (mAllowLongPress) { 695 mAllowLongPress = false; 696 // Try canceling the long press. It could also have been scheduled 697 // by a distant descendant, so use the mAllowLongPress flag to block 698 // everything 699 final View currentScreen = getChildAt(mCurrentScreen); 700 currentScreen.cancelLongPress(); 701 } 702 } 703 break; 704 705 case MotionEvent.ACTION_DOWN: 706 // Remember location of down touch 707 mLastMotionX = x; 708 mLastMotionY = y; 709 mAllowLongPress = true; 710 711 /* 712 * If being flinged and user touches the screen, initiate drag; 713 * otherwise don't. mScroller.isFinished should be false when 714 * being flinged. 715 */ 716 mTouchState = mScroller.isFinished() ? TOUCH_STATE_REST : TOUCH_STATE_SCROLLING; 717 break; 718 719 case MotionEvent.ACTION_CANCEL: 720 case MotionEvent.ACTION_UP: 721 // Release the drag 722 clearChildrenCache(); 723 mTouchState = TOUCH_STATE_REST; 724 mAllowLongPress = false; 725 break; 726 } 727 728 /* 729 * The only time we want to intercept motion events is if we are in the 730 * drag mode. 731 */ 732 return mTouchState != TOUCH_STATE_REST; 733 } 734 735 void enableChildrenCache() { 736 final int count = getChildCount(); 737 for (int i = 0; i < count; i++) { 738 final CellLayout layout = (CellLayout) getChildAt(i); 739 layout.setChildrenDrawnWithCacheEnabled(true); 740 layout.setChildrenDrawingCacheEnabled(true); 741 } 742 } 743 744 void clearChildrenCache() { 745 final int count = getChildCount(); 746 for (int i = 0; i < count; i++) { 747 final CellLayout layout = (CellLayout) getChildAt(i); 748 layout.setChildrenDrawnWithCacheEnabled(false); 749 } 750 } 751 752 @Override 753 public boolean onTouchEvent(MotionEvent ev) { 754 755 if (mLauncher.isWorkspaceLocked() || !mLauncher.isDrawerDown()) { 756 return false; // We don't want the events. Let them fall through to the all apps view. 757 } 758 759 if (mVelocityTracker == null) { 760 mVelocityTracker = VelocityTracker.obtain(); 761 } 762 mVelocityTracker.addMovement(ev); 763 764 final int action = ev.getAction(); 765 final float x = ev.getX(); 766 767 switch (action) { 768 case MotionEvent.ACTION_DOWN: 769 /* 770 * If being flinged and user touches, stop the fling. isFinished 771 * will be false if being flinged. 772 */ 773 if (!mScroller.isFinished()) { 774 mScroller.abortAnimation(); 775 } 776 777 // Remember where the motion event started 778 mLastMotionX = x; 779 break; 780 case MotionEvent.ACTION_MOVE: 781 if (mTouchState == TOUCH_STATE_SCROLLING) { 782 // Scroll to follow the motion event 783 final int deltaX = (int) (mLastMotionX - x); 784 mLastMotionX = x; 785 786 if (deltaX < 0) { 787 if (mScrollX > 0) { 788 scrollBy(Math.max(-mScrollX, deltaX), 0); 789 updateWallpaperOffset(); 790 } 791 } else if (deltaX > 0) { 792 final int availableToScroll = getChildAt(getChildCount() - 1).getRight() - 793 mScrollX - getWidth(); 794 if (availableToScroll > 0) { 795 scrollBy(Math.min(availableToScroll, deltaX), 0); 796 updateWallpaperOffset(); 797 } 798 } 799 } 800 break; 801 case MotionEvent.ACTION_UP: 802 if (mTouchState == TOUCH_STATE_SCROLLING) { 803 final VelocityTracker velocityTracker = mVelocityTracker; 804 velocityTracker.computeCurrentVelocity(1000, mMaximumVelocity); 805 int velocityX = (int) velocityTracker.getXVelocity(); 806 807 if (velocityX > SNAP_VELOCITY && mCurrentScreen > 0) { 808 // Fling hard enough to move left 809 snapToScreen(mCurrentScreen - 1); 810 } else if (velocityX < -SNAP_VELOCITY && mCurrentScreen < getChildCount() - 1) { 811 // Fling hard enough to move right 812 snapToScreen(mCurrentScreen + 1); 813 } else { 814 snapToDestination(); 815 } 816 817 if (mVelocityTracker != null) { 818 mVelocityTracker.recycle(); 819 mVelocityTracker = null; 820 } 821 } 822 mTouchState = TOUCH_STATE_REST; 823 break; 824 case MotionEvent.ACTION_CANCEL: 825 mTouchState = TOUCH_STATE_REST; 826 } 827 828 return true; 829 } 830 831 private void snapToDestination() { 832 final int screenWidth = getWidth(); 833 final int whichScreen = (mScrollX + (screenWidth / 2)) / screenWidth; 834 835 snapToScreen(whichScreen); 836 } 837 838 void snapToScreen(int whichScreen) { 839 if (!mScroller.isFinished()) return; 840 841 clearVacantCache(); 842 enableChildrenCache(); 843 844 whichScreen = Math.max(0, Math.min(whichScreen, getChildCount() - 1)); 845 boolean changingScreens = whichScreen != mCurrentScreen; 846 847 mNextScreen = whichScreen; 848 849 View focusedChild = getFocusedChild(); 850 if (focusedChild != null && changingScreens && focusedChild == getChildAt(mCurrentScreen)) { 851 focusedChild.clearFocus(); 852 } 853 854 final int newX = whichScreen * getWidth(); 855 final int delta = newX - mScrollX; 856 mScroller.startScroll(mScrollX, 0, delta, 0, Math.abs(delta) * 2); 857 invalidate(); 858 } 859 860 void startDrag(CellLayout.CellInfo cellInfo) { 861 View child = cellInfo.cell; 862 863 // Make sure the drag was started by a long press as opposed to a long click. 864 // Note that Search takes focus when clicked rather than entering touch mode 865 if (!child.isInTouchMode() && !(child instanceof Search)) { 866 return; 867 } 868 869 mDragInfo = cellInfo; 870 mDragInfo.screen = mCurrentScreen; 871 872 CellLayout current = ((CellLayout) getChildAt(mCurrentScreen)); 873 874 current.onDragChild(child); 875 mDragController.startDrag(child, this, child.getTag(), DragController.DRAG_ACTION_MOVE); 876 invalidate(); 877 } 878 879 @Override 880 protected Parcelable onSaveInstanceState() { 881 final SavedState state = new SavedState(super.onSaveInstanceState()); 882 state.currentScreen = mCurrentScreen; 883 return state; 884 } 885 886 @Override 887 protected void onRestoreInstanceState(Parcelable state) { 888 SavedState savedState = (SavedState) state; 889 super.onRestoreInstanceState(savedState.getSuperState()); 890 if (savedState.currentScreen != -1) { 891 mCurrentScreen = savedState.currentScreen; 892 Launcher.setScreen(mCurrentScreen); 893 } 894 } 895 896 void addApplicationShortcut(ApplicationInfo info, CellLayout.CellInfo cellInfo) { 897 addApplicationShortcut(info, cellInfo, false); 898 } 899 900 void addApplicationShortcut(ApplicationInfo info, CellLayout.CellInfo cellInfo, 901 boolean insertAtFirst) { 902 final CellLayout layout = (CellLayout) getChildAt(cellInfo.screen); 903 final int[] result = new int[2]; 904 905 layout.cellToPoint(cellInfo.cellX, cellInfo.cellY, result); 906 onDropExternal(result[0], result[1], info, layout, insertAtFirst); 907 } 908 909 public void onDrop(DragSource source, int x, int y, int xOffset, int yOffset, 910 DragView dragView, Object dragInfo) { 911 final CellLayout cellLayout = getCurrentDropLayout(); 912 if (source != this) { 913 onDropExternal(x - xOffset, y - yOffset, dragInfo, cellLayout); 914 } else { 915 // Move internally 916 if (mDragInfo != null) { 917 final View cell = mDragInfo.cell; 918 if (mCurrentScreen != mDragInfo.screen) { 919 final CellLayout originalCellLayout = (CellLayout) getChildAt(mDragInfo.screen); 920 originalCellLayout.removeView(cell); 921 cellLayout.addView(cell); 922 } 923 mTargetCell = estimateDropCell(x - xOffset, y - yOffset, 924 mDragInfo.spanX, mDragInfo.spanY, cell, cellLayout, mTargetCell); 925 cellLayout.onDropChild(cell, mTargetCell); 926 927 final ItemInfo info = (ItemInfo)cell.getTag(); 928 CellLayout.LayoutParams lp = (CellLayout.LayoutParams) cell.getLayoutParams(); 929 LauncherModel.moveItemInDatabase(mLauncher, info, 930 LauncherSettings.Favorites.CONTAINER_DESKTOP, mCurrentScreen, lp.cellX, lp.cellY); 931 } 932 } 933 } 934 935 public void onDragEnter(DragSource source, int x, int y, int xOffset, int yOffset, 936 DragView dragView, Object dragInfo) { 937 clearVacantCache(); 938 } 939 940 public void onDragOver(DragSource source, int x, int y, int xOffset, int yOffset, 941 DragView dragView, Object dragInfo) { 942 } 943 944 public void onDragExit(DragSource source, int x, int y, int xOffset, int yOffset, 945 DragView dragView, Object dragInfo) { 946 clearVacantCache(); 947 } 948 949 private void onDropExternal(int x, int y, Object dragInfo, CellLayout cellLayout) { 950 onDropExternal(x, y, dragInfo, cellLayout, false); 951 } 952 953 private void onDropExternal(int x, int y, Object dragInfo, CellLayout cellLayout, 954 boolean insertAtFirst) { 955 // Drag from somewhere else 956 ItemInfo info = (ItemInfo) dragInfo; 957 958 View view; 959 960 switch (info.itemType) { 961 case LauncherSettings.Favorites.ITEM_TYPE_APPLICATION: 962 case LauncherSettings.Favorites.ITEM_TYPE_SHORTCUT: 963 if (info.container == NO_ID) { 964 // Came from all apps -- make a copy 965 info = new ApplicationInfo((ApplicationInfo) info); 966 } 967 view = mLauncher.createShortcut(R.layout.application, cellLayout, 968 (ApplicationInfo) info); 969 break; 970 case LauncherSettings.Favorites.ITEM_TYPE_USER_FOLDER: 971 view = FolderIcon.fromXml(R.layout.folder_icon, mLauncher, 972 (ViewGroup) getChildAt(mCurrentScreen), ((UserFolderInfo) info)); 973 break; 974 default: 975 throw new IllegalStateException("Unknown item type: " + info.itemType); 976 } 977 978 cellLayout.addView(view, insertAtFirst ? 0 : -1); 979 view.setOnLongClickListener(mLongClickListener); 980 if (view instanceof DropTarget) { 981 mDragController.addDropTarget((DropTarget)view); 982 } 983 984 mTargetCell = estimateDropCell(x, y, 1, 1, view, cellLayout, mTargetCell); 985 cellLayout.onDropChild(view, mTargetCell); 986 CellLayout.LayoutParams lp = (CellLayout.LayoutParams) view.getLayoutParams(); 987 988 LauncherModel.addOrMoveItemInDatabase(mLauncher, info, 989 LauncherSettings.Favorites.CONTAINER_DESKTOP, mCurrentScreen, lp.cellX, lp.cellY); 990 } 991 992 /** 993 * Return the current {@link CellLayout}, correctly picking the destination 994 * screen while a scroll is in progress. 995 */ 996 private CellLayout getCurrentDropLayout() { 997 int index = mScroller.isFinished() ? mCurrentScreen : mNextScreen; 998 return (CellLayout) getChildAt(index); 999 } 1000 1001 /** 1002 * {@inheritDoc} 1003 */ 1004 public boolean acceptDrop(DragSource source, int x, int y, 1005 int xOffset, int yOffset, DragView dragView, Object dragInfo) { 1006 final CellLayout layout = getCurrentDropLayout(); 1007 final CellLayout.CellInfo cellInfo = mDragInfo; 1008 final int spanX = cellInfo == null ? 1 : cellInfo.spanX; 1009 final int spanY = cellInfo == null ? 1 : cellInfo.spanY; 1010 1011 if (mVacantCache == null) { 1012 final View ignoreView = cellInfo == null ? null : cellInfo.cell; 1013 mVacantCache = layout.findAllVacantCells(null, ignoreView); 1014 } 1015 1016 return mVacantCache.findCellForSpan(mTempEstimate, spanX, spanY, false); 1017 } 1018 1019 /** 1020 * {@inheritDoc} 1021 */ 1022 public Rect estimateDropLocation(DragSource source, int x, int y, 1023 int xOffset, int yOffset, DragView dragView, Object dragInfo, Rect recycle) { 1024 final CellLayout layout = getCurrentDropLayout(); 1025 1026 final CellLayout.CellInfo cellInfo = mDragInfo; 1027 final int spanX = cellInfo == null ? 1 : cellInfo.spanX; 1028 final int spanY = cellInfo == null ? 1 : cellInfo.spanY; 1029 final View ignoreView = cellInfo == null ? null : cellInfo.cell; 1030 1031 final Rect location = recycle != null ? recycle : new Rect(); 1032 1033 // Find drop cell and convert into rectangle 1034 int[] dropCell = estimateDropCell(x - xOffset, y - yOffset, 1035 spanX, spanY, ignoreView, layout, mTempCell); 1036 1037 if (dropCell == null) { 1038 return null; 1039 } 1040 1041 layout.cellToPoint(dropCell[0], dropCell[1], mTempEstimate); 1042 location.left = mTempEstimate[0]; 1043 location.top = mTempEstimate[1]; 1044 1045 layout.cellToPoint(dropCell[0] + spanX, dropCell[1] + spanY, mTempEstimate); 1046 location.right = mTempEstimate[0]; 1047 location.bottom = mTempEstimate[1]; 1048 1049 return location; 1050 } 1051 1052 /** 1053 * Calculate the nearest cell where the given object would be dropped. 1054 */ 1055 private int[] estimateDropCell(int pixelX, int pixelY, 1056 int spanX, int spanY, View ignoreView, CellLayout layout, int[] recycle) { 1057 // Create vacant cell cache if none exists 1058 if (mVacantCache == null) { 1059 mVacantCache = layout.findAllVacantCells(null, ignoreView); 1060 } 1061 1062 // Find the best target drop location 1063 return layout.findNearestVacantArea(pixelX, pixelY, 1064 spanX, spanY, mVacantCache, recycle); 1065 } 1066 1067 void setLauncher(Launcher launcher) { 1068 mLauncher = launcher; 1069 } 1070 1071 public void setDragController(DragController dragController) { 1072 mDragController = dragController; 1073 } 1074 1075 public void onDropCompleted(View target, boolean success) { 1076 if (success){ 1077 if (target != this && mDragInfo != null) { 1078 final CellLayout cellLayout = (CellLayout) getChildAt(mDragInfo.screen); 1079 cellLayout.removeView(mDragInfo.cell); 1080 if (mDragInfo.cell instanceof DropTarget) { 1081 mDragController.removeDropTarget((DropTarget)mDragInfo.cell); 1082 } 1083 final Object tag = mDragInfo.cell.getTag(); 1084 } 1085 } else { 1086 if (mDragInfo != null) { 1087 final CellLayout cellLayout = (CellLayout) getChildAt(mDragInfo.screen); 1088 cellLayout.onDropAborted(mDragInfo.cell); 1089 } 1090 } 1091 1092 mDragInfo = null; 1093 } 1094 1095 public void scrollLeft() { 1096 clearVacantCache(); 1097 if (mNextScreen == INVALID_SCREEN && mCurrentScreen > 0 && mScroller.isFinished()) { 1098 snapToScreen(mCurrentScreen - 1); 1099 } 1100 } 1101 1102 public void scrollRight() { 1103 clearVacantCache(); 1104 if (mNextScreen == INVALID_SCREEN && mCurrentScreen < getChildCount() -1 && 1105 mScroller.isFinished()) { 1106 snapToScreen(mCurrentScreen + 1); 1107 } 1108 } 1109 1110 public int getScreenForView(View v) { 1111 int result = -1; 1112 if (v != null) { 1113 ViewParent vp = v.getParent(); 1114 int count = getChildCount(); 1115 for (int i = 0; i < count; i++) { 1116 if (vp == getChildAt(i)) { 1117 return i; 1118 } 1119 } 1120 } 1121 return result; 1122 } 1123 1124 /** 1125 * Find a search widget on the given screen 1126 */ 1127 private Search findSearchWidget(CellLayout screen) { 1128 final int count = screen.getChildCount(); 1129 for (int i = 0; i < count; i++) { 1130 View v = screen.getChildAt(i); 1131 if (v instanceof Search) { 1132 return (Search) v; 1133 } 1134 } 1135 return null; 1136 } 1137 1138 /** 1139 * Gets the first search widget on the current screen, if there is one. 1140 * Returns <code>null</code> otherwise. 1141 */ 1142 public Search findSearchWidgetOnCurrentScreen() { 1143 CellLayout currentScreen = (CellLayout)getChildAt(mCurrentScreen); 1144 return findSearchWidget(currentScreen); 1145 } 1146 1147 public Folder getFolderForTag(Object tag) { 1148 int screenCount = getChildCount(); 1149 for (int screen = 0; screen < screenCount; screen++) { 1150 CellLayout currentScreen = ((CellLayout) getChildAt(screen)); 1151 int count = currentScreen.getChildCount(); 1152 for (int i = 0; i < count; i++) { 1153 View child = currentScreen.getChildAt(i); 1154 CellLayout.LayoutParams lp = (CellLayout.LayoutParams) child.getLayoutParams(); 1155 if (lp.cellHSpan == 4 && lp.cellVSpan == 4 && child instanceof Folder) { 1156 Folder f = (Folder) child; 1157 if (f.getInfo() == tag) { 1158 return f; 1159 } 1160 } 1161 } 1162 } 1163 return null; 1164 } 1165 1166 public View getViewForTag(Object tag) { 1167 int screenCount = getChildCount(); 1168 for (int screen = 0; screen < screenCount; screen++) { 1169 CellLayout currentScreen = ((CellLayout) getChildAt(screen)); 1170 int count = currentScreen.getChildCount(); 1171 for (int i = 0; i < count; i++) { 1172 View child = currentScreen.getChildAt(i); 1173 if (child.getTag() == tag) { 1174 return child; 1175 } 1176 } 1177 } 1178 return null; 1179 } 1180 1181 /** 1182 * @return True is long presses are still allowed for the current touch 1183 */ 1184 public boolean allowLongPress() { 1185 return mAllowLongPress; 1186 } 1187 1188 /** 1189 * Set true to allow long-press events to be triggered, usually checked by 1190 * {@link Launcher} to accept or block dpad-initiated long-presses. 1191 */ 1192 public void setAllowLongPress(boolean allowLongPress) { 1193 mAllowLongPress = allowLongPress; 1194 } 1195 1196 void removeShortcutsForPackage(String packageName) { 1197 final ArrayList<View> childrenToRemove = new ArrayList<View>(); 1198 final int count = getChildCount(); 1199 1200 for (int i = 0; i < count; i++) { 1201 final CellLayout layout = (CellLayout) getChildAt(i); 1202 int childCount = layout.getChildCount(); 1203 1204 childrenToRemove.clear(); 1205 1206 for (int j = 0; j < childCount; j++) { 1207 final View view = layout.getChildAt(j); 1208 Object tag = view.getTag(); 1209 1210 if (tag instanceof ApplicationInfo) { 1211 final ApplicationInfo info = (ApplicationInfo) tag; 1212 // We need to check for ACTION_MAIN otherwise getComponent() might 1213 // return null for some shortcuts (for instance, for shortcuts to 1214 // web pages.) 1215 final Intent intent = info.intent; 1216 final ComponentName name = intent.getComponent(); 1217 1218 if (Intent.ACTION_MAIN.equals(intent.getAction()) && 1219 name != null && packageName.equals(name.getPackageName())) { 1220 LauncherModel.deleteItemFromDatabase(mLauncher, info); 1221 childrenToRemove.add(view); 1222 } 1223 } else if (tag instanceof UserFolderInfo) { 1224 final UserFolderInfo info = (UserFolderInfo) tag; 1225 final ArrayList<ApplicationInfo> contents = info.contents; 1226 final ArrayList<ApplicationInfo> toRemove = new ArrayList<ApplicationInfo>(1); 1227 final int contentsCount = contents.size(); 1228 boolean removedFromFolder = false; 1229 1230 for (int k = 0; k < contentsCount; k++) { 1231 final ApplicationInfo appInfo = contents.get(k); 1232 final Intent intent = appInfo.intent; 1233 final ComponentName name = intent.getComponent(); 1234 1235 if (Intent.ACTION_MAIN.equals(intent.getAction()) && 1236 name != null && packageName.equals(name.getPackageName())) { 1237 toRemove.add(appInfo); 1238 LauncherModel.deleteItemFromDatabase(mLauncher, appInfo); 1239 removedFromFolder = true; 1240 } 1241 } 1242 1243 contents.removeAll(toRemove); 1244 if (removedFromFolder) { 1245 final Folder folder = getOpenFolder(); 1246 if (folder != null) folder.notifyDataSetChanged(); 1247 } 1248 } 1249 } 1250 1251 childCount = childrenToRemove.size(); 1252 for (int j = 0; j < childCount; j++) { 1253 View child = childrenToRemove.get(j); 1254 layout.removeViewInLayout(child); 1255 if (child instanceof DropTarget) { 1256 mDragController.removeDropTarget((DropTarget)child); 1257 } 1258 } 1259 1260 if (childCount > 0) { 1261 layout.requestLayout(); 1262 layout.invalidate(); 1263 } 1264 } 1265 } 1266 1267 void updateShortcutsForPackage(String packageName) { 1268 final PackageManager pm = mLauncher.getPackageManager(); 1269 1270 final int count = getChildCount(); 1271 for (int i = 0; i < count; i++) { 1272 final CellLayout layout = (CellLayout) getChildAt(i); 1273 int childCount = layout.getChildCount(); 1274 for (int j = 0; j < childCount; j++) { 1275 final View view = layout.getChildAt(j); 1276 Object tag = view.getTag(); 1277 if (tag instanceof ApplicationInfo) { 1278 ApplicationInfo info = (ApplicationInfo) tag; 1279 // We need to check for ACTION_MAIN otherwise getComponent() might 1280 // return null for some shortcuts (for instance, for shortcuts to 1281 // web pages.) 1282 final Intent intent = info.intent; 1283 final ComponentName name = intent.getComponent(); 1284 if (info.itemType == LauncherSettings.Favorites.ITEM_TYPE_APPLICATION && 1285 Intent.ACTION_MAIN.equals(intent.getAction()) && name != null && 1286 packageName.equals(name.getPackageName())) { 1287 1288 final Drawable icon = AppInfoCache.getIconDrawable(pm, info); 1289 if (icon != null && icon != info.icon) { 1290 info.icon.setCallback(null); 1291 info.icon = Utilities.createIconThumbnail(icon, mContext, false); 1292 info.filtered = true; 1293 ((TextView) view).setCompoundDrawablesWithIntrinsicBounds(null, 1294 info.icon, null, null); 1295 } 1296 } 1297 } 1298 } 1299 } 1300 } 1301 1302 void moveToDefaultScreen() { 1303 snapToScreen(mDefaultScreen); 1304 getChildAt(mDefaultScreen).requestFocus(); 1305 } 1306 1307 public static class SavedState extends BaseSavedState { 1308 int currentScreen = -1; 1309 1310 SavedState(Parcelable superState) { 1311 super(superState); 1312 } 1313 1314 private SavedState(Parcel in) { 1315 super(in); 1316 currentScreen = in.readInt(); 1317 } 1318 1319 @Override 1320 public void writeToParcel(Parcel out, int flags) { 1321 super.writeToParcel(out, flags); 1322 out.writeInt(currentScreen); 1323 } 1324 1325 public static final Parcelable.Creator<SavedState> CREATOR = 1326 new Parcelable.Creator<SavedState>() { 1327 public SavedState createFromParcel(Parcel in) { 1328 return new SavedState(in); 1329 } 1330 1331 public SavedState[] newArray(int size) { 1332 return new SavedState[size]; 1333 } 1334 }; 1335 } 1336 1337 void show() { 1338 mTween.start(true); 1339 setVisibility(VISIBLE); 1340 } 1341 1342 void hide() { 1343 mTween.start(false); 1344 } 1345 1346 public void onTweenValueChanged(float value, float oldValue) { 1347 mAlpha = (int)(255*value); 1348 invalidate(); 1349 } 1350 1351 public void onTweenStarted() { 1352 // TODO: This conflicts with the cache for drawing. Ref count instead? 1353 // TODO: Don't cache all three. 1354 enableChildrenCache(); 1355 } 1356 1357 public void onTweenFinished() { 1358 // TODO: This conflicts with the cache for drawing. Ref count instead? 1359 // TODO: Don't cache all three. 1360 clearChildrenCache(); 1361 if (mAlpha == 0) { 1362 setVisibility(GONE); 1363 } 1364 } 1365} 1366