Workspace.java revision 8f573952b8729b4319043ae0908997ecd2d68951
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.graphics.Canvas; 25import android.graphics.RectF; 26import android.graphics.Rect; 27import android.graphics.drawable.Drawable; 28import android.util.AttributeSet; 29import android.view.MotionEvent; 30import android.view.VelocityTracker; 31import android.view.View; 32import android.view.ViewConfiguration; 33import android.view.ViewGroup; 34import android.view.ViewParent; 35import android.widget.Scroller; 36import android.widget.TextView; 37import android.os.Parcelable; 38import android.os.Parcel; 39 40import java.util.ArrayList; 41 42/** 43 * The workspace is a wide area with a wallpaper and a finite number of screens. Each 44 * screen contains a number of icons, folders or widgets the user can interact with. 45 * A workspace is meant to be used with a fixed width only. 46 */ 47public class Workspace extends ViewGroup implements DropTarget, DragSource, DragScroller, 48 TweenCallback { 49 private static final int INVALID_SCREEN = -1; 50 51 /** 52 * The velocity at which a fling gesture will cause us to snap to the next screen 53 */ 54 private static final int SNAP_VELOCITY = 1000; 55 56 private final WallpaperManager mWallpaperManager; 57 58 private int mDefaultScreen; 59 60 private boolean mFirstLayout = true; 61 62 private int mCurrentScreen; 63 private int mNextScreen = INVALID_SCREEN; 64 private Scroller mScroller; 65 private VelocityTracker mVelocityTracker; 66 67 private SymmetricalLinearTween mTween; 68 private int mAlpha = 255; 69 70 /** 71 * CellInfo for the cell that is currently being dragged 72 */ 73 private CellLayout.CellInfo mDragInfo; 74 75 /** 76 * Target drop area calculated during last acceptDrop call. 77 */ 78 private int[] mTargetCell = null; 79 80 private float mLastMotionX; 81 private float mLastMotionY; 82 83 private final static int TOUCH_STATE_REST = 0; 84 private final static int TOUCH_STATE_SCROLLING = 1; 85 86 private int mTouchState = TOUCH_STATE_REST; 87 88 private OnLongClickListener mLongClickListener; 89 90 private Launcher mLauncher; 91 private DragController mDragController; 92 93 /** 94 * Cache of vacant cells, used during drag events and invalidated as needed. 95 */ 96 private CellLayout.CellInfo mVacantCache = null; 97 98 private int[] mTempCell = new int[2]; 99 private int[] mTempEstimate = new int[2]; 100 101 private boolean mAllowLongPress; 102 private boolean mLocked; 103 104 private int mTouchSlop; 105 private int mMaximumVelocity; 106 107 final Rect mDrawerBounds = new Rect(); 108 final Rect mClipBounds = new Rect(); 109 int mDrawerContentHeight; 110 int mDrawerContentWidth; 111 112 /** 113 * Used to inflate the Workspace from XML. 114 * 115 * @param context The application's context. 116 * @param attrs The attribtues set containing the Workspace's customization values. 117 */ 118 public Workspace(Context context, AttributeSet attrs) { 119 this(context, attrs, 0); 120 } 121 122 /** 123 * Used to inflate the Workspace from XML. 124 * 125 * @param context The application's context. 126 * @param attrs The attribtues set containing the Workspace's customization values. 127 * @param defStyle Unused. 128 */ 129 public Workspace(Context context, AttributeSet attrs, int defStyle) { 130 super(context, attrs, defStyle); 131 132 mWallpaperManager = WallpaperManager.getInstance(context); 133 134 TypedArray a = context.obtainStyledAttributes(attrs, R.styleable.Workspace, defStyle, 0); 135 mDefaultScreen = a.getInt(R.styleable.Workspace_defaultScreen, 1); 136 a.recycle(); 137 138 initWorkspace(); 139 } 140 141 /** 142 * Initializes various states for this workspace. 143 */ 144 private void initWorkspace() { 145 mScroller = new Scroller(getContext()); 146 mCurrentScreen = mDefaultScreen; 147 Launcher.setScreen(mCurrentScreen); 148 149 final ViewConfiguration configuration = ViewConfiguration.get(getContext()); 150 mTouchSlop = configuration.getScaledTouchSlop(); 151 mMaximumVelocity = configuration.getScaledMaximumFlingVelocity(); 152 153 mTween = new SymmetricalLinearTween(true, 250/*ms*/, this); 154 } 155 156 @Override 157 public void addView(View child, int index, LayoutParams params) { 158 if (!(child instanceof CellLayout)) { 159 throw new IllegalArgumentException("A Workspace can only have CellLayout children."); 160 } 161 super.addView(child, index, params); 162 } 163 164 @Override 165 public void addView(View child) { 166 if (!(child instanceof CellLayout)) { 167 throw new IllegalArgumentException("A Workspace can only have CellLayout children."); 168 } 169 super.addView(child); 170 } 171 172 @Override 173 public void addView(View child, int index) { 174 if (!(child instanceof CellLayout)) { 175 throw new IllegalArgumentException("A Workspace can only have CellLayout children."); 176 } 177 super.addView(child, index); 178 } 179 180 @Override 181 public void addView(View child, int width, int height) { 182 if (!(child instanceof CellLayout)) { 183 throw new IllegalArgumentException("A Workspace can only have CellLayout children."); 184 } 185 super.addView(child, width, height); 186 } 187 188 @Override 189 public void addView(View child, LayoutParams params) { 190 if (!(child instanceof CellLayout)) { 191 throw new IllegalArgumentException("A Workspace can only have CellLayout children."); 192 } 193 super.addView(child, params); 194 } 195 196 /** 197 * @return The open folder on the current screen, or null if there is none 198 */ 199 Folder getOpenFolder() { 200 CellLayout currentScreen = (CellLayout) getChildAt(mCurrentScreen); 201 int count = currentScreen.getChildCount(); 202 for (int i = 0; i < count; i++) { 203 View child = currentScreen.getChildAt(i); 204 CellLayout.LayoutParams lp = (CellLayout.LayoutParams) child.getLayoutParams(); 205 if (lp.cellHSpan == 4 && lp.cellVSpan == 4 && child instanceof Folder) { 206 return (Folder) child; 207 } 208 } 209 return null; 210 } 211 212 ArrayList<Folder> getOpenFolders() { 213 final int screens = getChildCount(); 214 ArrayList<Folder> folders = new ArrayList<Folder>(screens); 215 216 for (int screen = 0; screen < screens; screen++) { 217 CellLayout currentScreen = (CellLayout) getChildAt(screen); 218 int count = currentScreen.getChildCount(); 219 for (int i = 0; i < count; i++) { 220 View child = currentScreen.getChildAt(i); 221 CellLayout.LayoutParams lp = (CellLayout.LayoutParams) child.getLayoutParams(); 222 if (lp.cellHSpan == 4 && lp.cellVSpan == 4 && child instanceof Folder) { 223 folders.add((Folder) child); 224 break; 225 } 226 } 227 } 228 229 return folders; 230 } 231 232 boolean isDefaultScreenShowing() { 233 return mCurrentScreen == mDefaultScreen; 234 } 235 236 /** 237 * Returns the index of the currently displayed screen. 238 * 239 * @return The index of the currently displayed screen. 240 */ 241 int getCurrentScreen() { 242 return mCurrentScreen; 243 } 244 245 /** 246 * Returns how many screens there are. 247 */ 248 int getScreenCount() { 249 return getChildCount(); 250 } 251 252 /** 253 * Computes a bounding rectangle for a range of cells 254 * 255 * @param cellX X coordinate of upper left corner expressed as a cell position 256 * @param cellY Y coordinate of upper left corner expressed as a cell position 257 * @param cellHSpan Width in cells 258 * @param cellVSpan Height in cells 259 * @param rect Rectnagle into which to put the results 260 */ 261 public void cellToRect(int cellX, int cellY, int cellHSpan, int cellVSpan, RectF rect) { 262 ((CellLayout)getChildAt(mCurrentScreen)).cellToRect(cellX, cellY, 263 cellHSpan, cellVSpan, rect); 264 } 265 266 /** 267 * Sets the current screen. 268 * 269 * @param currentScreen 270 */ 271 void setCurrentScreen(int currentScreen) { 272 clearVacantCache(); 273 mCurrentScreen = Math.max(0, Math.min(currentScreen, getChildCount() - 1)); 274 scrollTo(mCurrentScreen * getWidth(), 0); 275 invalidate(); 276 } 277 278 /** 279 * Shows the default screen (defined by the firstScreen attribute in XML.) 280 */ 281 void showDefaultScreen() { 282 setCurrentScreen(mDefaultScreen); 283 } 284 285 /** 286 * Adds the specified child in the current screen. The position and dimension of 287 * the child are defined by x, y, spanX and spanY. 288 * 289 * @param child The child to add in one of the workspace's screens. 290 * @param x The X position of the child in the screen's grid. 291 * @param y The Y position of the child in the screen's grid. 292 * @param spanX The number of cells spanned horizontally by the child. 293 * @param spanY The number of cells spanned vertically by the child. 294 */ 295 void addInCurrentScreen(View child, int x, int y, int spanX, int spanY) { 296 addInScreen(child, mCurrentScreen, x, y, spanX, spanY, false); 297 } 298 299 /** 300 * Adds the specified child in the current screen. The position and dimension of 301 * the child are defined by x, y, spanX and spanY. 302 * 303 * @param child The child to add in one of the workspace's screens. 304 * @param x The X position of the child in the screen's grid. 305 * @param y The Y position of the child in the screen's grid. 306 * @param spanX The number of cells spanned horizontally by the child. 307 * @param spanY The number of cells spanned vertically by the child. 308 * @param insert When true, the child is inserted at the beginning of the children list. 309 */ 310 void addInCurrentScreen(View child, int x, int y, int spanX, int spanY, boolean insert) { 311 addInScreen(child, mCurrentScreen, x, y, spanX, spanY, insert); 312 } 313 314 /** 315 * Adds the specified child in the specified screen. The position and dimension of 316 * the child are defined by x, y, spanX and spanY. 317 * 318 * @param child The child to add in one of the workspace's screens. 319 * @param screen The screen in which to add the child. 320 * @param x The X position of the child in the screen's grid. 321 * @param y The Y position of the child in the screen's grid. 322 * @param spanX The number of cells spanned horizontally by the child. 323 * @param spanY The number of cells spanned vertically by the child. 324 */ 325 void addInScreen(View child, int screen, int x, int y, int spanX, int spanY) { 326 addInScreen(child, screen, x, y, spanX, spanY, false); 327 } 328 329 /** 330 * Adds the specified child in the specified screen. The position and dimension of 331 * the child are defined by x, y, spanX and spanY. 332 * 333 * @param child The child to add in one of the workspace's screens. 334 * @param screen The screen in which to add the child. 335 * @param x The X position of the child in the screen's grid. 336 * @param y The Y position of the child in the screen's grid. 337 * @param spanX The number of cells spanned horizontally by the child. 338 * @param spanY The number of cells spanned vertically by the child. 339 * @param insert When true, the child is inserted at the beginning of the children list. 340 */ 341 void addInScreen(View child, int screen, int x, int y, int spanX, int spanY, boolean insert) { 342 if (screen < 0 || screen >= getChildCount()) { 343 throw new IllegalStateException("The screen must be >= 0 and < " + getChildCount()); 344 } 345 346 clearVacantCache(); 347 348 final CellLayout group = (CellLayout) getChildAt(screen); 349 CellLayout.LayoutParams lp = (CellLayout.LayoutParams) child.getLayoutParams(); 350 if (lp == null) { 351 lp = new CellLayout.LayoutParams(x, y, spanX, spanY); 352 } else { 353 lp.cellX = x; 354 lp.cellY = y; 355 lp.cellHSpan = spanX; 356 lp.cellVSpan = spanY; 357 } 358 group.addView(child, insert ? 0 : -1, lp); 359 if (!(child instanceof Folder)) { 360 child.setOnLongClickListener(mLongClickListener); 361 } 362 if (child instanceof DropTarget) { 363 mDragController.addDropTarget((DropTarget)child); 364 } 365 } 366 367 void addWidget(View view, Widget widget) { 368 addInScreen(view, widget.screen, widget.cellX, widget.cellY, widget.spanX, 369 widget.spanY, false); 370 } 371 372 void addWidget(View view, Widget widget, boolean insert) { 373 addInScreen(view, widget.screen, widget.cellX, widget.cellY, widget.spanX, 374 widget.spanY, insert); 375 } 376 377 CellLayout.CellInfo findAllVacantCells(boolean[] occupied) { 378 CellLayout group = (CellLayout) getChildAt(mCurrentScreen); 379 if (group != null) { 380 return group.findAllVacantCells(occupied, null); 381 } 382 return null; 383 } 384 385 private void clearVacantCache() { 386 if (mVacantCache != null) { 387 mVacantCache.clearVacantCells(); 388 mVacantCache = null; 389 } 390 } 391 392 /** 393 * Returns the coordinate of a vacant cell for the current screen. 394 */ 395 boolean getVacantCell(int[] vacant, int spanX, int spanY) { 396 CellLayout group = (CellLayout) getChildAt(mCurrentScreen); 397 if (group != null) { 398 return group.getVacantCell(vacant, spanX, spanY); 399 } 400 return false; 401 } 402 403 /** 404 * Adds the specified child in the current screen. The position and dimension of 405 * the child are defined by x, y, spanX and spanY. 406 * 407 * @param child The child to add in one of the workspace's screens. 408 * @param spanX The number of cells spanned horizontally by the child. 409 * @param spanY The number of cells spanned vertically by the child. 410 */ 411 void fitInCurrentScreen(View child, int spanX, int spanY) { 412 fitInScreen(child, mCurrentScreen, spanX, spanY); 413 } 414 415 /** 416 * Adds the specified child in the specified screen. The position and dimension of 417 * the child are defined by x, y, spanX and spanY. 418 * 419 * @param child The child to add in one of the workspace's screens. 420 * @param screen The screen in which to add the child. 421 * @param spanX The number of cells spanned horizontally by the child. 422 * @param spanY The number of cells spanned vertically by the child. 423 */ 424 void fitInScreen(View child, int screen, int spanX, int spanY) { 425 if (screen < 0 || screen >= getChildCount()) { 426 throw new IllegalStateException("The screen must be >= 0 and < " + getChildCount()); 427 } 428 429 final CellLayout group = (CellLayout) getChildAt(screen); 430 boolean vacant = group.getVacantCell(mTempCell, spanX, spanY); 431 if (vacant) { 432 group.addView(child, 433 new CellLayout.LayoutParams(mTempCell[0], mTempCell[1], spanX, spanY)); 434 child.setOnLongClickListener(mLongClickListener); 435 if (!(child instanceof Folder)) { 436 child.setOnLongClickListener(mLongClickListener); 437 } 438 if (child instanceof DropTarget) { 439 mDragController.addDropTarget((DropTarget)child); 440 } 441 } 442 } 443 444 /** 445 * Registers the specified listener on each screen contained in this workspace. 446 * 447 * @param l The listener used to respond to long clicks. 448 */ 449 @Override 450 public void setOnLongClickListener(OnLongClickListener l) { 451 mLongClickListener = l; 452 final int count = getChildCount(); 453 for (int i = 0; i < count; i++) { 454 getChildAt(i).setOnLongClickListener(l); 455 } 456 } 457 458 private void updateWallpaperOffset() { 459 int scrollRange = getChildAt(getChildCount()-1).getRight()-getWidth(); 460 mWallpaperManager.setWallpaperOffsets(getWindowToken(), 461 mScrollX/(float)scrollRange, 0); 462 } 463 464 @Override 465 public void computeScroll() { 466 if (mScroller.computeScrollOffset()) { 467 mScrollX = mScroller.getCurrX(); 468 mScrollY = mScroller.getCurrY(); 469 updateWallpaperOffset(); 470 postInvalidate(); 471 } else if (mNextScreen != INVALID_SCREEN) { 472 mCurrentScreen = Math.max(0, Math.min(mNextScreen, getChildCount() - 1)); 473 Launcher.setScreen(mCurrentScreen); 474 mNextScreen = INVALID_SCREEN; 475 clearChildrenCache(); 476 } 477 } 478 479 @Override 480 protected void dispatchDraw(Canvas canvas) { 481 boolean restore = false; 482 int restoreCount = 0; 483 484 // For the fade. If view gets setAlpha(), use that instead. 485 int alpha = mAlpha; 486 if (alpha < 255) { 487 int sx = mScrollX; 488 restoreCount = canvas.saveLayerAlpha(sx, 0, sx+getWidth(), getHeight(), alpha, 489 Canvas.HAS_ALPHA_LAYER_SAVE_FLAG | Canvas.CLIP_TO_LAYER_SAVE_FLAG); 490 restore = true; 491 } 492 493 // ViewGroup.dispatchDraw() supports many features we don't need: 494 // clip to padding, layout animation, animation listener, disappearing 495 // children, etc. The following implementation attempts to fast-track 496 // the drawing dispatch by drawing only what we know needs to be drawn. 497 498 boolean fastDraw = mTouchState != TOUCH_STATE_SCROLLING && mNextScreen == INVALID_SCREEN; 499 // If we are not scrolling or flinging, draw only the current screen 500 if (fastDraw) { 501 drawChild(canvas, getChildAt(mCurrentScreen), getDrawingTime()); 502 } else { 503 final long drawingTime = getDrawingTime(); 504 // If we are flinging, draw only the current screen and the target screen 505 if (mNextScreen >= 0 && mNextScreen < getChildCount() && 506 Math.abs(mCurrentScreen - mNextScreen) == 1) { 507 drawChild(canvas, getChildAt(mCurrentScreen), drawingTime); 508 drawChild(canvas, getChildAt(mNextScreen), drawingTime); 509 } else { 510 // If we are scrolling, draw all of our children 511 final int count = getChildCount(); 512 for (int i = 0; i < count; i++) { 513 drawChild(canvas, getChildAt(i), drawingTime); 514 } 515 } 516 } 517 518 if (restore) { 519 canvas.restoreToCount(restoreCount); 520 } 521 } 522 523 protected void onAttachedToWindow() { 524 super.onAttachedToWindow(); 525 mDragController.setWindowToken(getWindowToken()); 526 } 527 528 @Override 529 protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { 530 super.onMeasure(widthMeasureSpec, heightMeasureSpec); 531 532 final int width = MeasureSpec.getSize(widthMeasureSpec); 533 final int widthMode = MeasureSpec.getMode(widthMeasureSpec); 534 if (widthMode != MeasureSpec.EXACTLY) { 535 throw new IllegalStateException("Workspace can only be used in EXACTLY mode."); 536 } 537 538 final int heightMode = MeasureSpec.getMode(heightMeasureSpec); 539 if (heightMode != MeasureSpec.EXACTLY) { 540 throw new IllegalStateException("Workspace can only be used in EXACTLY mode."); 541 } 542 543 // The children are given the same width and height as the workspace 544 final int count = getChildCount(); 545 for (int i = 0; i < count; i++) { 546 getChildAt(i).measure(widthMeasureSpec, heightMeasureSpec); 547 } 548 549 if (mFirstLayout) { 550 scrollTo(mCurrentScreen * width, 0); 551 mFirstLayout = false; 552 } 553 } 554 555 @Override 556 protected void onLayout(boolean changed, int left, int top, int right, int bottom) { 557 int childLeft = 0; 558 559 final int count = getChildCount(); 560 for (int i = 0; i < count; i++) { 561 final View child = getChildAt(i); 562 if (child.getVisibility() != View.GONE) { 563 final int childWidth = child.getMeasuredWidth(); 564 child.layout(childLeft, 0, childLeft + childWidth, child.getMeasuredHeight()); 565 childLeft += childWidth; 566 } 567 } 568 } 569 570 @Override 571 public boolean requestChildRectangleOnScreen(View child, Rect rectangle, boolean immediate) { 572 int screen = indexOfChild(child); 573 if (screen != mCurrentScreen || !mScroller.isFinished()) { 574 if (!mLauncher.isWorkspaceLocked()) { 575 snapToScreen(screen); 576 } 577 return true; 578 } 579 return false; 580 } 581 582 @Override 583 protected boolean onRequestFocusInDescendants(int direction, Rect previouslyFocusedRect) { 584 if (mLauncher.isDrawerDown()) { 585 final Folder openFolder = getOpenFolder(); 586 if (openFolder != null) { 587 return openFolder.requestFocus(direction, previouslyFocusedRect); 588 } else { 589 int focusableScreen; 590 if (mNextScreen != INVALID_SCREEN) { 591 focusableScreen = mNextScreen; 592 } else { 593 focusableScreen = mCurrentScreen; 594 } 595 getChildAt(focusableScreen).requestFocus(direction, previouslyFocusedRect); 596 } 597 } 598 return false; 599 } 600 601 @Override 602 public boolean dispatchUnhandledMove(View focused, int direction) { 603 if (direction == View.FOCUS_LEFT) { 604 if (getCurrentScreen() > 0) { 605 snapToScreen(getCurrentScreen() - 1); 606 return true; 607 } 608 } else if (direction == View.FOCUS_RIGHT) { 609 if (getCurrentScreen() < getChildCount() - 1) { 610 snapToScreen(getCurrentScreen() + 1); 611 return true; 612 } 613 } 614 return super.dispatchUnhandledMove(focused, direction); 615 } 616 617 @Override 618 public void addFocusables(ArrayList<View> views, int direction, int focusableMode) { 619 if (mLauncher.isDrawerDown()) { 620 final Folder openFolder = getOpenFolder(); 621 if (openFolder == null) { 622 getChildAt(mCurrentScreen).addFocusables(views, direction); 623 if (direction == View.FOCUS_LEFT) { 624 if (mCurrentScreen > 0) { 625 getChildAt(mCurrentScreen - 1).addFocusables(views, direction); 626 } 627 } else if (direction == View.FOCUS_RIGHT){ 628 if (mCurrentScreen < getChildCount() - 1) { 629 getChildAt(mCurrentScreen + 1).addFocusables(views, direction); 630 } 631 } 632 } else { 633 openFolder.addFocusables(views, direction); 634 } 635 } 636 } 637 638 @Override 639 public boolean onInterceptTouchEvent(MotionEvent ev) { 640 if (mLocked || !mLauncher.isDrawerDown()) { 641 return true; 642 } 643 644 /* 645 * This method JUST determines whether we want to intercept the motion. 646 * If we return true, onTouchEvent will be called and we do the actual 647 * scrolling there. 648 */ 649 650 /* 651 * Shortcut the most recurring case: the user is in the dragging 652 * state and he is moving his finger. We want to intercept this 653 * motion. 654 */ 655 final int action = ev.getAction(); 656 if ((action == MotionEvent.ACTION_MOVE) && (mTouchState != TOUCH_STATE_REST)) { 657 return true; 658 } 659 660 final float x = ev.getX(); 661 final float y = ev.getY(); 662 663 switch (action) { 664 case MotionEvent.ACTION_MOVE: 665 /* 666 * mIsBeingDragged == false, otherwise the shortcut would have caught it. Check 667 * whether the user has moved far enough from his original down touch. 668 */ 669 670 /* 671 * Locally do absolute value. mLastMotionX is set to the y value 672 * of the down event. 673 */ 674 final int xDiff = (int) Math.abs(x - mLastMotionX); 675 final int yDiff = (int) Math.abs(y - mLastMotionY); 676 677 final int touchSlop = mTouchSlop; 678 boolean xMoved = xDiff > touchSlop; 679 boolean yMoved = yDiff > touchSlop; 680 681 if (xMoved || yMoved) { 682 683 if (xMoved) { 684 // Scroll if the user moved far enough along the X axis 685 mTouchState = TOUCH_STATE_SCROLLING; 686 enableChildrenCache(); 687 } 688 // Either way, cancel any pending longpress 689 if (mAllowLongPress) { 690 mAllowLongPress = false; 691 // Try canceling the long press. It could also have been scheduled 692 // by a distant descendant, so use the mAllowLongPress flag to block 693 // everything 694 final View currentScreen = getChildAt(mCurrentScreen); 695 currentScreen.cancelLongPress(); 696 } 697 } 698 break; 699 700 case MotionEvent.ACTION_DOWN: 701 // Remember location of down touch 702 mLastMotionX = x; 703 mLastMotionY = y; 704 mAllowLongPress = true; 705 706 /* 707 * If being flinged and user touches the screen, initiate drag; 708 * otherwise don't. mScroller.isFinished should be false when 709 * being flinged. 710 */ 711 mTouchState = mScroller.isFinished() ? TOUCH_STATE_REST : TOUCH_STATE_SCROLLING; 712 break; 713 714 case MotionEvent.ACTION_CANCEL: 715 case MotionEvent.ACTION_UP: 716 // Release the drag 717 clearChildrenCache(); 718 mTouchState = TOUCH_STATE_REST; 719 mAllowLongPress = false; 720 break; 721 } 722 723 /* 724 * The only time we want to intercept motion events is if we are in the 725 * drag mode. 726 */ 727 return mTouchState != TOUCH_STATE_REST; 728 } 729 730 void enableChildrenCache() { 731 final int count = getChildCount(); 732 for (int i = 0; i < count; i++) { 733 final CellLayout layout = (CellLayout) getChildAt(i); 734 layout.setChildrenDrawnWithCacheEnabled(true); 735 layout.setChildrenDrawingCacheEnabled(true); 736 } 737 } 738 739 void clearChildrenCache() { 740 final int count = getChildCount(); 741 for (int i = 0; i < count; i++) { 742 final CellLayout layout = (CellLayout) getChildAt(i); 743 layout.setChildrenDrawnWithCacheEnabled(false); 744 } 745 } 746 747 @Override 748 public boolean onTouchEvent(MotionEvent ev) { 749 750 if (mLocked || !mLauncher.isDrawerDown()) { 751 return true; 752 } 753 754 if (mVelocityTracker == null) { 755 mVelocityTracker = VelocityTracker.obtain(); 756 } 757 mVelocityTracker.addMovement(ev); 758 759 final int action = ev.getAction(); 760 final float x = ev.getX(); 761 762 switch (action) { 763 case MotionEvent.ACTION_DOWN: 764 /* 765 * If being flinged and user touches, stop the fling. isFinished 766 * will be false if being flinged. 767 */ 768 if (!mScroller.isFinished()) { 769 mScroller.abortAnimation(); 770 } 771 772 // Remember where the motion event started 773 mLastMotionX = x; 774 break; 775 case MotionEvent.ACTION_MOVE: 776 if (mTouchState == TOUCH_STATE_SCROLLING) { 777 // Scroll to follow the motion event 778 final int deltaX = (int) (mLastMotionX - x); 779 mLastMotionX = x; 780 781 if (deltaX < 0) { 782 if (mScrollX > 0) { 783 scrollBy(Math.max(-mScrollX, deltaX), 0); 784 updateWallpaperOffset(); 785 } 786 } else if (deltaX > 0) { 787 final int availableToScroll = getChildAt(getChildCount() - 1).getRight() - 788 mScrollX - getWidth(); 789 if (availableToScroll > 0) { 790 scrollBy(Math.min(availableToScroll, deltaX), 0); 791 updateWallpaperOffset(); 792 } 793 } 794 } 795 break; 796 case MotionEvent.ACTION_UP: 797 if (mTouchState == TOUCH_STATE_SCROLLING) { 798 final VelocityTracker velocityTracker = mVelocityTracker; 799 velocityTracker.computeCurrentVelocity(1000, mMaximumVelocity); 800 int velocityX = (int) velocityTracker.getXVelocity(); 801 802 if (velocityX > SNAP_VELOCITY && mCurrentScreen > 0) { 803 // Fling hard enough to move left 804 snapToScreen(mCurrentScreen - 1); 805 } else if (velocityX < -SNAP_VELOCITY && mCurrentScreen < getChildCount() - 1) { 806 // Fling hard enough to move right 807 snapToScreen(mCurrentScreen + 1); 808 } else { 809 snapToDestination(); 810 } 811 812 if (mVelocityTracker != null) { 813 mVelocityTracker.recycle(); 814 mVelocityTracker = null; 815 } 816 } 817 mTouchState = TOUCH_STATE_REST; 818 break; 819 case MotionEvent.ACTION_CANCEL: 820 mTouchState = TOUCH_STATE_REST; 821 } 822 823 return true; 824 } 825 826 private void snapToDestination() { 827 final int screenWidth = getWidth(); 828 final int whichScreen = (mScrollX + (screenWidth / 2)) / screenWidth; 829 830 snapToScreen(whichScreen); 831 } 832 833 void snapToScreen(int whichScreen) { 834 if (!mScroller.isFinished()) return; 835 836 clearVacantCache(); 837 enableChildrenCache(); 838 839 whichScreen = Math.max(0, Math.min(whichScreen, getChildCount() - 1)); 840 boolean changingScreens = whichScreen != mCurrentScreen; 841 842 mNextScreen = whichScreen; 843 844 View focusedChild = getFocusedChild(); 845 if (focusedChild != null && changingScreens && focusedChild == getChildAt(mCurrentScreen)) { 846 focusedChild.clearFocus(); 847 } 848 849 final int newX = whichScreen * getWidth(); 850 final int delta = newX - mScrollX; 851 mScroller.startScroll(mScrollX, 0, delta, 0, Math.abs(delta) * 2); 852 invalidate(); 853 } 854 855 void startDrag(CellLayout.CellInfo cellInfo) { 856 View child = cellInfo.cell; 857 858 // Make sure the drag was started by a long press as opposed to a long click. 859 // Note that Search takes focus when clicked rather than entering touch mode 860 if (!child.isInTouchMode() && !(child instanceof Search)) { 861 return; 862 } 863 864 mDragInfo = cellInfo; 865 mDragInfo.screen = mCurrentScreen; 866 867 CellLayout current = ((CellLayout) getChildAt(mCurrentScreen)); 868 869 current.onDragChild(child); 870 mDragController.startDrag(child, this, child.getTag(), DragController.DRAG_ACTION_MOVE); 871 invalidate(); 872 } 873 874 @Override 875 protected Parcelable onSaveInstanceState() { 876 final SavedState state = new SavedState(super.onSaveInstanceState()); 877 state.currentScreen = mCurrentScreen; 878 return state; 879 } 880 881 @Override 882 protected void onRestoreInstanceState(Parcelable state) { 883 SavedState savedState = (SavedState) state; 884 super.onRestoreInstanceState(savedState.getSuperState()); 885 if (savedState.currentScreen != -1) { 886 mCurrentScreen = savedState.currentScreen; 887 Launcher.setScreen(mCurrentScreen); 888 } 889 } 890 891 void addApplicationShortcut(ApplicationInfo info, CellLayout.CellInfo cellInfo) { 892 addApplicationShortcut(info, cellInfo, false); 893 } 894 895 void addApplicationShortcut(ApplicationInfo info, CellLayout.CellInfo cellInfo, 896 boolean insertAtFirst) { 897 final CellLayout layout = (CellLayout) getChildAt(cellInfo.screen); 898 final int[] result = new int[2]; 899 900 layout.cellToPoint(cellInfo.cellX, cellInfo.cellY, result); 901 onDropExternal(result[0], result[1], info, layout, insertAtFirst); 902 } 903 904 public void onDrop(DragSource source, int x, int y, int xOffset, int yOffset, 905 DragView dragView, Object dragInfo) { 906 final CellLayout cellLayout = getCurrentDropLayout(); 907 if (source != this) { 908 onDropExternal(x - xOffset, y - yOffset, dragInfo, cellLayout); 909 } else { 910 // Move internally 911 if (mDragInfo != null) { 912 final View cell = mDragInfo.cell; 913 if (mCurrentScreen != mDragInfo.screen) { 914 final CellLayout originalCellLayout = (CellLayout) getChildAt(mDragInfo.screen); 915 originalCellLayout.removeView(cell); 916 cellLayout.addView(cell); 917 } 918 mTargetCell = estimateDropCell(x - xOffset, y - yOffset, 919 mDragInfo.spanX, mDragInfo.spanY, cell, cellLayout, mTargetCell); 920 cellLayout.onDropChild(cell, mTargetCell); 921 922 final ItemInfo info = (ItemInfo)cell.getTag(); 923 CellLayout.LayoutParams lp = (CellLayout.LayoutParams) cell.getLayoutParams(); 924 LauncherModel.moveItemInDatabase(mLauncher, info, 925 LauncherSettings.Favorites.CONTAINER_DESKTOP, mCurrentScreen, lp.cellX, lp.cellY); 926 } 927 } 928 } 929 930 public void onDragEnter(DragSource source, int x, int y, int xOffset, int yOffset, 931 DragView dragView, Object dragInfo) { 932 clearVacantCache(); 933 } 934 935 public void onDragOver(DragSource source, int x, int y, int xOffset, int yOffset, 936 DragView dragView, Object dragInfo) { 937 } 938 939 public void onDragExit(DragSource source, int x, int y, int xOffset, int yOffset, 940 DragView dragView, Object dragInfo) { 941 clearVacantCache(); 942 } 943 944 private void onDropExternal(int x, int y, Object dragInfo, CellLayout cellLayout) { 945 onDropExternal(x, y, dragInfo, cellLayout, false); 946 } 947 948 private void onDropExternal(int x, int y, Object dragInfo, CellLayout cellLayout, 949 boolean insertAtFirst) { 950 // Drag from somewhere else 951 ItemInfo info = (ItemInfo) dragInfo; 952 953 View view; 954 955 switch (info.itemType) { 956 case LauncherSettings.Favorites.ITEM_TYPE_APPLICATION: 957 case LauncherSettings.Favorites.ITEM_TYPE_SHORTCUT: 958 if (info.container == NO_ID) { 959 // Came from all apps -- make a copy 960 info = new ApplicationInfo((ApplicationInfo) info); 961 } 962 view = mLauncher.createShortcut(R.layout.application, cellLayout, 963 (ApplicationInfo) info); 964 break; 965 case LauncherSettings.Favorites.ITEM_TYPE_USER_FOLDER: 966 view = FolderIcon.fromXml(R.layout.folder_icon, mLauncher, 967 (ViewGroup) getChildAt(mCurrentScreen), ((UserFolderInfo) info)); 968 break; 969 default: 970 throw new IllegalStateException("Unknown item type: " + info.itemType); 971 } 972 973 cellLayout.addView(view, insertAtFirst ? 0 : -1); 974 view.setOnLongClickListener(mLongClickListener); 975 if (view instanceof DropTarget) { 976 mDragController.addDropTarget((DropTarget)view); 977 } 978 979 mTargetCell = estimateDropCell(x, y, 1, 1, view, cellLayout, mTargetCell); 980 cellLayout.onDropChild(view, mTargetCell); 981 CellLayout.LayoutParams lp = (CellLayout.LayoutParams) view.getLayoutParams(); 982 983 final LauncherModel model = Launcher.getModel(); 984 model.addDesktopItem(info); 985 LauncherModel.addOrMoveItemInDatabase(mLauncher, info, 986 LauncherSettings.Favorites.CONTAINER_DESKTOP, mCurrentScreen, lp.cellX, lp.cellY); 987 } 988 989 /** 990 * Return the current {@link CellLayout}, correctly picking the destination 991 * screen while a scroll is in progress. 992 */ 993 private CellLayout getCurrentDropLayout() { 994 int index = mScroller.isFinished() ? mCurrentScreen : mNextScreen; 995 return (CellLayout) getChildAt(index); 996 } 997 998 /** 999 * {@inheritDoc} 1000 */ 1001 public boolean acceptDrop(DragSource source, int x, int y, 1002 int xOffset, int yOffset, DragView dragView, Object dragInfo) { 1003 final CellLayout layout = getCurrentDropLayout(); 1004 final CellLayout.CellInfo cellInfo = mDragInfo; 1005 final int spanX = cellInfo == null ? 1 : cellInfo.spanX; 1006 final int spanY = cellInfo == null ? 1 : cellInfo.spanY; 1007 1008 if (mVacantCache == null) { 1009 final View ignoreView = cellInfo == null ? null : cellInfo.cell; 1010 mVacantCache = layout.findAllVacantCells(null, ignoreView); 1011 } 1012 1013 return mVacantCache.findCellForSpan(mTempEstimate, spanX, spanY, false); 1014 } 1015 1016 /** 1017 * {@inheritDoc} 1018 */ 1019 public Rect estimateDropLocation(DragSource source, int x, int y, 1020 int xOffset, int yOffset, DragView dragView, Object dragInfo, Rect recycle) { 1021 final CellLayout layout = getCurrentDropLayout(); 1022 1023 final CellLayout.CellInfo cellInfo = mDragInfo; 1024 final int spanX = cellInfo == null ? 1 : cellInfo.spanX; 1025 final int spanY = cellInfo == null ? 1 : cellInfo.spanY; 1026 final View ignoreView = cellInfo == null ? null : cellInfo.cell; 1027 1028 final Rect location = recycle != null ? recycle : new Rect(); 1029 1030 // Find drop cell and convert into rectangle 1031 int[] dropCell = estimateDropCell(x - xOffset, y - yOffset, 1032 spanX, spanY, ignoreView, layout, mTempCell); 1033 1034 if (dropCell == null) { 1035 return null; 1036 } 1037 1038 layout.cellToPoint(dropCell[0], dropCell[1], mTempEstimate); 1039 location.left = mTempEstimate[0]; 1040 location.top = mTempEstimate[1]; 1041 1042 layout.cellToPoint(dropCell[0] + spanX, dropCell[1] + spanY, mTempEstimate); 1043 location.right = mTempEstimate[0]; 1044 location.bottom = mTempEstimate[1]; 1045 1046 return location; 1047 } 1048 1049 /** 1050 * Calculate the nearest cell where the given object would be dropped. 1051 */ 1052 private int[] estimateDropCell(int pixelX, int pixelY, 1053 int spanX, int spanY, View ignoreView, CellLayout layout, int[] recycle) { 1054 // Create vacant cell cache if none exists 1055 if (mVacantCache == null) { 1056 mVacantCache = layout.findAllVacantCells(null, ignoreView); 1057 } 1058 1059 // Find the best target drop location 1060 return layout.findNearestVacantArea(pixelX, pixelY, 1061 spanX, spanY, mVacantCache, recycle); 1062 } 1063 1064 void setLauncher(Launcher launcher) { 1065 mLauncher = launcher; 1066 } 1067 1068 public void setDragController(DragController dragController) { 1069 mDragController = dragController; 1070 } 1071 1072 public void onDropCompleted(View target, boolean success) { 1073 if (success){ 1074 if (target != this && mDragInfo != null) { 1075 final CellLayout cellLayout = (CellLayout) getChildAt(mDragInfo.screen); 1076 cellLayout.removeView(mDragInfo.cell); 1077 if (mDragInfo.cell instanceof DropTarget) { 1078 mDragController.removeDropTarget((DropTarget)mDragInfo.cell); 1079 } 1080 final Object tag = mDragInfo.cell.getTag(); 1081 Launcher.getModel().removeDesktopItem((ItemInfo) tag); 1082 } 1083 } else { 1084 if (mDragInfo != null) { 1085 final CellLayout cellLayout = (CellLayout) getChildAt(mDragInfo.screen); 1086 cellLayout.onDropAborted(mDragInfo.cell); 1087 } 1088 } 1089 1090 mDragInfo = null; 1091 } 1092 1093 public void scrollLeft() { 1094 clearVacantCache(); 1095 if (mNextScreen == INVALID_SCREEN && mCurrentScreen > 0 && mScroller.isFinished()) { 1096 snapToScreen(mCurrentScreen - 1); 1097 } 1098 } 1099 1100 public void scrollRight() { 1101 clearVacantCache(); 1102 if (mNextScreen == INVALID_SCREEN && mCurrentScreen < getChildCount() -1 && 1103 mScroller.isFinished()) { 1104 snapToScreen(mCurrentScreen + 1); 1105 } 1106 } 1107 1108 public int getScreenForView(View v) { 1109 int result = -1; 1110 if (v != null) { 1111 ViewParent vp = v.getParent(); 1112 int count = getChildCount(); 1113 for (int i = 0; i < count; i++) { 1114 if (vp == getChildAt(i)) { 1115 return i; 1116 } 1117 } 1118 } 1119 return result; 1120 } 1121 1122 /** 1123 * Find a search widget on the given screen 1124 */ 1125 private Search findSearchWidget(CellLayout screen) { 1126 final int count = screen.getChildCount(); 1127 for (int i = 0; i < count; i++) { 1128 View v = screen.getChildAt(i); 1129 if (v instanceof Search) { 1130 return (Search) v; 1131 } 1132 } 1133 return null; 1134 } 1135 1136 /** 1137 * Gets the first search widget on the current screen, if there is one. 1138 * Returns <code>null</code> otherwise. 1139 */ 1140 public Search findSearchWidgetOnCurrentScreen() { 1141 CellLayout currentScreen = (CellLayout)getChildAt(mCurrentScreen); 1142 return findSearchWidget(currentScreen); 1143 } 1144 1145 public Folder getFolderForTag(Object tag) { 1146 int screenCount = getChildCount(); 1147 for (int screen = 0; screen < screenCount; screen++) { 1148 CellLayout currentScreen = ((CellLayout) getChildAt(screen)); 1149 int count = currentScreen.getChildCount(); 1150 for (int i = 0; i < count; i++) { 1151 View child = currentScreen.getChildAt(i); 1152 CellLayout.LayoutParams lp = (CellLayout.LayoutParams) child.getLayoutParams(); 1153 if (lp.cellHSpan == 4 && lp.cellVSpan == 4 && child instanceof Folder) { 1154 Folder f = (Folder) child; 1155 if (f.getInfo() == tag) { 1156 return f; 1157 } 1158 } 1159 } 1160 } 1161 return null; 1162 } 1163 1164 public View getViewForTag(Object tag) { 1165 int screenCount = getChildCount(); 1166 for (int screen = 0; screen < screenCount; screen++) { 1167 CellLayout currentScreen = ((CellLayout) getChildAt(screen)); 1168 int count = currentScreen.getChildCount(); 1169 for (int i = 0; i < count; i++) { 1170 View child = currentScreen.getChildAt(i); 1171 if (child.getTag() == tag) { 1172 return child; 1173 } 1174 } 1175 } 1176 return null; 1177 } 1178 1179 /** 1180 * Unlocks the SlidingDrawer so that touch events are processed. 1181 * 1182 * @see #lock() 1183 */ 1184 public void unlock() { 1185 mLocked = false; 1186 } 1187 1188 /** 1189 * Locks the SlidingDrawer so that touch events are ignores. 1190 * 1191 * @see #unlock() 1192 */ 1193 public void lock() { 1194 mLocked = true; 1195 } 1196 1197 /** 1198 * @return True is long presses are still allowed for the current touch 1199 */ 1200 public boolean allowLongPress() { 1201 return mAllowLongPress; 1202 } 1203 1204 /** 1205 * Set true to allow long-press events to be triggered, usually checked by 1206 * {@link Launcher} to accept or block dpad-initiated long-presses. 1207 */ 1208 public void setAllowLongPress(boolean allowLongPress) { 1209 mAllowLongPress = allowLongPress; 1210 } 1211 1212 void removeShortcutsForPackage(String packageName) { 1213 final ArrayList<View> childrenToRemove = new ArrayList<View>(); 1214 final LauncherModel model = Launcher.getModel(); 1215 final int count = getChildCount(); 1216 1217 for (int i = 0; i < count; i++) { 1218 final CellLayout layout = (CellLayout) getChildAt(i); 1219 int childCount = layout.getChildCount(); 1220 1221 childrenToRemove.clear(); 1222 1223 for (int j = 0; j < childCount; j++) { 1224 final View view = layout.getChildAt(j); 1225 Object tag = view.getTag(); 1226 1227 if (tag instanceof ApplicationInfo) { 1228 final ApplicationInfo info = (ApplicationInfo) tag; 1229 // We need to check for ACTION_MAIN otherwise getComponent() might 1230 // return null for some shortcuts (for instance, for shortcuts to 1231 // web pages.) 1232 final Intent intent = info.intent; 1233 final ComponentName name = intent.getComponent(); 1234 1235 if (Intent.ACTION_MAIN.equals(intent.getAction()) && 1236 name != null && packageName.equals(name.getPackageName())) { 1237 model.removeDesktopItem(info); 1238 LauncherModel.deleteItemFromDatabase(mLauncher, info); 1239 childrenToRemove.add(view); 1240 } 1241 } else if (tag instanceof UserFolderInfo) { 1242 final UserFolderInfo info = (UserFolderInfo) tag; 1243 final ArrayList<ApplicationInfo> contents = info.contents; 1244 final ArrayList<ApplicationInfo> toRemove = new ArrayList<ApplicationInfo>(1); 1245 final int contentsCount = contents.size(); 1246 boolean removedFromFolder = false; 1247 1248 for (int k = 0; k < contentsCount; k++) { 1249 final ApplicationInfo appInfo = contents.get(k); 1250 final Intent intent = appInfo.intent; 1251 final ComponentName name = intent.getComponent(); 1252 1253 if (Intent.ACTION_MAIN.equals(intent.getAction()) && 1254 name != null && packageName.equals(name.getPackageName())) { 1255 toRemove.add(appInfo); 1256 LauncherModel.deleteItemFromDatabase(mLauncher, appInfo); 1257 removedFromFolder = true; 1258 } 1259 } 1260 1261 contents.removeAll(toRemove); 1262 if (removedFromFolder) { 1263 final Folder folder = getOpenFolder(); 1264 if (folder != null) folder.notifyDataSetChanged(); 1265 } 1266 } 1267 } 1268 1269 childCount = childrenToRemove.size(); 1270 for (int j = 0; j < childCount; j++) { 1271 View child = childrenToRemove.get(j); 1272 layout.removeViewInLayout(child); 1273 if (child instanceof DropTarget) { 1274 mDragController.removeDropTarget((DropTarget)child); 1275 } 1276 } 1277 1278 if (childCount > 0) { 1279 layout.requestLayout(); 1280 layout.invalidate(); 1281 } 1282 } 1283 } 1284 1285 void updateShortcutsForPackage(String packageName) { 1286 final int count = getChildCount(); 1287 for (int i = 0; i < count; i++) { 1288 final CellLayout layout = (CellLayout) getChildAt(i); 1289 int childCount = layout.getChildCount(); 1290 for (int j = 0; j < childCount; j++) { 1291 final View view = layout.getChildAt(j); 1292 Object tag = view.getTag(); 1293 if (tag instanceof ApplicationInfo) { 1294 ApplicationInfo info = (ApplicationInfo) tag; 1295 // We need to check for ACTION_MAIN otherwise getComponent() might 1296 // return null for some shortcuts (for instance, for shortcuts to 1297 // web pages.) 1298 final Intent intent = info.intent; 1299 final ComponentName name = intent.getComponent(); 1300 if (info.itemType == LauncherSettings.Favorites.ITEM_TYPE_APPLICATION && 1301 Intent.ACTION_MAIN.equals(intent.getAction()) && name != null && 1302 packageName.equals(name.getPackageName())) { 1303 1304 final Drawable icon = Launcher.getModel().getApplicationInfoIcon( 1305 mLauncher.getPackageManager(), info); 1306 if (icon != null && icon != info.icon) { 1307 info.icon.setCallback(null); 1308 info.icon = Utilities.createIconThumbnail(icon, mContext); 1309 info.filtered = true; 1310 ((TextView) view).setCompoundDrawablesWithIntrinsicBounds(null, 1311 info.icon, null, null); 1312 } 1313 } 1314 } 1315 } 1316 } 1317 } 1318 1319 void moveToDefaultScreen() { 1320 snapToScreen(mDefaultScreen); 1321 getChildAt(mDefaultScreen).requestFocus(); 1322 } 1323 1324 public static class SavedState extends BaseSavedState { 1325 int currentScreen = -1; 1326 1327 SavedState(Parcelable superState) { 1328 super(superState); 1329 } 1330 1331 private SavedState(Parcel in) { 1332 super(in); 1333 currentScreen = in.readInt(); 1334 } 1335 1336 @Override 1337 public void writeToParcel(Parcel out, int flags) { 1338 super.writeToParcel(out, flags); 1339 out.writeInt(currentScreen); 1340 } 1341 1342 public static final Parcelable.Creator<SavedState> CREATOR = 1343 new Parcelable.Creator<SavedState>() { 1344 public SavedState createFromParcel(Parcel in) { 1345 return new SavedState(in); 1346 } 1347 1348 public SavedState[] newArray(int size) { 1349 return new SavedState[size]; 1350 } 1351 }; 1352 } 1353 1354 void show() { 1355 mTween.start(true); 1356 } 1357 1358 void hide() { 1359 mTween.start(false); 1360 } 1361 1362 public void onTweenValueChanged(float value, float oldValue) { 1363 mAlpha = (int)(255*value); 1364 invalidate(); 1365 } 1366 1367 public void onTweenStarted() { 1368 // TODO: This conflicts with the cache for drawing. Ref count instead? 1369 // TODO: Don't cache all three. 1370 enableChildrenCache(); 1371 } 1372 1373 public void onTweenFinished() { 1374 // TODO: This conflicts with the cache for drawing. Ref count instead? 1375 // TODO: Don't cache all three. 1376 clearChildrenCache(); 1377 } 1378} 1379