Workspace.java revision 49cdb1b18c12a81cac9817c4800e43d5b507e0c4
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 updateWallpaperOffset(); 276 invalidate(); 277 } 278 279 /** 280 * Shows the default screen (defined by the firstScreen attribute in XML.) 281 */ 282 void showDefaultScreen() { 283 setCurrentScreen(mDefaultScreen); 284 } 285 286 /** 287 * Adds the specified child in the current screen. The position and dimension of 288 * the child are defined by x, y, spanX and spanY. 289 * 290 * @param child The child to add in one of the workspace's screens. 291 * @param x The X position of the child in the screen's grid. 292 * @param y The Y position of the child in the screen's grid. 293 * @param spanX The number of cells spanned horizontally by the child. 294 * @param spanY The number of cells spanned vertically by the child. 295 */ 296 void addInCurrentScreen(View child, int x, int y, int spanX, int spanY) { 297 addInScreen(child, mCurrentScreen, x, y, spanX, spanY, false); 298 } 299 300 /** 301 * Adds the specified child in the current screen. The position and dimension of 302 * the child are defined by x, y, spanX and spanY. 303 * 304 * @param child The child to add in one of the workspace's screens. 305 * @param x The X position of the child in the screen's grid. 306 * @param y The Y position of the child in the screen's grid. 307 * @param spanX The number of cells spanned horizontally by the child. 308 * @param spanY The number of cells spanned vertically by the child. 309 * @param insert When true, the child is inserted at the beginning of the children list. 310 */ 311 void addInCurrentScreen(View child, int x, int y, int spanX, int spanY, boolean insert) { 312 addInScreen(child, mCurrentScreen, x, y, spanX, spanY, insert); 313 } 314 315 /** 316 * Adds the specified child in the specified screen. The position and dimension of 317 * the child are defined by x, y, spanX and spanY. 318 * 319 * @param child The child to add in one of the workspace's screens. 320 * @param screen The screen in which to add the child. 321 * @param x The X position of the child in the screen's grid. 322 * @param y The Y position of the child in the screen's grid. 323 * @param spanX The number of cells spanned horizontally by the child. 324 * @param spanY The number of cells spanned vertically by the child. 325 */ 326 void addInScreen(View child, int screen, int x, int y, int spanX, int spanY) { 327 addInScreen(child, screen, x, y, spanX, spanY, false); 328 } 329 330 /** 331 * Adds the specified child in the specified screen. The position and dimension of 332 * the child are defined by x, y, spanX and spanY. 333 * 334 * @param child The child to add in one of the workspace's screens. 335 * @param screen The screen in which to add the child. 336 * @param x The X position of the child in the screen's grid. 337 * @param y The Y position of the child in the screen's grid. 338 * @param spanX The number of cells spanned horizontally by the child. 339 * @param spanY The number of cells spanned vertically by the child. 340 * @param insert When true, the child is inserted at the beginning of the children list. 341 */ 342 void addInScreen(View child, int screen, int x, int y, int spanX, int spanY, boolean insert) { 343 if (screen < 0 || screen >= getChildCount()) { 344 throw new IllegalStateException("The screen must be >= 0 and < " + getChildCount()); 345 } 346 347 clearVacantCache(); 348 349 final CellLayout group = (CellLayout) getChildAt(screen); 350 CellLayout.LayoutParams lp = (CellLayout.LayoutParams) child.getLayoutParams(); 351 if (lp == null) { 352 lp = new CellLayout.LayoutParams(x, y, spanX, spanY); 353 } else { 354 lp.cellX = x; 355 lp.cellY = y; 356 lp.cellHSpan = spanX; 357 lp.cellVSpan = spanY; 358 } 359 group.addView(child, insert ? 0 : -1, lp); 360 if (!(child instanceof Folder)) { 361 child.setOnLongClickListener(mLongClickListener); 362 } 363 if (child instanceof DropTarget) { 364 mDragController.addDropTarget((DropTarget)child); 365 } 366 } 367 368 void addWidget(View view, Widget widget) { 369 addInScreen(view, widget.screen, widget.cellX, widget.cellY, widget.spanX, 370 widget.spanY, false); 371 } 372 373 void addWidget(View view, Widget widget, boolean insert) { 374 addInScreen(view, widget.screen, widget.cellX, widget.cellY, widget.spanX, 375 widget.spanY, insert); 376 } 377 378 CellLayout.CellInfo findAllVacantCells(boolean[] occupied) { 379 CellLayout group = (CellLayout) getChildAt(mCurrentScreen); 380 if (group != null) { 381 return group.findAllVacantCells(occupied, null); 382 } 383 return null; 384 } 385 386 private void clearVacantCache() { 387 if (mVacantCache != null) { 388 mVacantCache.clearVacantCells(); 389 mVacantCache = null; 390 } 391 } 392 393 /** 394 * Returns the coordinate of a vacant cell for the current screen. 395 */ 396 boolean getVacantCell(int[] vacant, int spanX, int spanY) { 397 CellLayout group = (CellLayout) getChildAt(mCurrentScreen); 398 if (group != null) { 399 return group.getVacantCell(vacant, spanX, spanY); 400 } 401 return false; 402 } 403 404 /** 405 * Adds the specified child in the current screen. The position and dimension of 406 * the child are defined by x, y, spanX and spanY. 407 * 408 * @param child The child to add in one of the workspace's screens. 409 * @param spanX The number of cells spanned horizontally by the child. 410 * @param spanY The number of cells spanned vertically by the child. 411 */ 412 void fitInCurrentScreen(View child, int spanX, int spanY) { 413 fitInScreen(child, mCurrentScreen, spanX, spanY); 414 } 415 416 /** 417 * Adds the specified child in the specified screen. The position and dimension of 418 * the child are defined by x, y, spanX and spanY. 419 * 420 * @param child The child to add in one of the workspace's screens. 421 * @param screen The screen in which to add the child. 422 * @param spanX The number of cells spanned horizontally by the child. 423 * @param spanY The number of cells spanned vertically by the child. 424 */ 425 void fitInScreen(View child, int screen, int spanX, int spanY) { 426 if (screen < 0 || screen >= getChildCount()) { 427 throw new IllegalStateException("The screen must be >= 0 and < " + getChildCount()); 428 } 429 430 final CellLayout group = (CellLayout) getChildAt(screen); 431 boolean vacant = group.getVacantCell(mTempCell, spanX, spanY); 432 if (vacant) { 433 group.addView(child, 434 new CellLayout.LayoutParams(mTempCell[0], mTempCell[1], spanX, spanY)); 435 child.setOnLongClickListener(mLongClickListener); 436 if (!(child instanceof Folder)) { 437 child.setOnLongClickListener(mLongClickListener); 438 } 439 if (child instanceof DropTarget) { 440 mDragController.addDropTarget((DropTarget)child); 441 } 442 } 443 } 444 445 /** 446 * Registers the specified listener on each screen contained in this workspace. 447 * 448 * @param l The listener used to respond to long clicks. 449 */ 450 @Override 451 public void setOnLongClickListener(OnLongClickListener l) { 452 mLongClickListener = l; 453 final int count = getChildCount(); 454 for (int i = 0; i < count; i++) { 455 getChildAt(i).setOnLongClickListener(l); 456 } 457 } 458 459 private void updateWallpaperOffset() { 460 updateWallpaperOffset(getChildAt(getChildCount() - 1).getRight() - (mRight - mLeft)); 461 } 462 463 private void updateWallpaperOffset(int scrollRange) { 464 mWallpaperManager.setWallpaperOffsets(getWindowToken(), mScrollX / (float) scrollRange, 0); 465 } 466 467 @Override 468 public void computeScroll() { 469 if (mScroller.computeScrollOffset()) { 470 mScrollX = mScroller.getCurrX(); 471 mScrollY = mScroller.getCurrY(); 472 updateWallpaperOffset(); 473 postInvalidate(); 474 } else if (mNextScreen != INVALID_SCREEN) { 475 mCurrentScreen = Math.max(0, Math.min(mNextScreen, getChildCount() - 1)); 476 Launcher.setScreen(mCurrentScreen); 477 mNextScreen = INVALID_SCREEN; 478 clearChildrenCache(); 479 } 480 } 481 482 @Override 483 protected void dispatchDraw(Canvas canvas) { 484 boolean restore = false; 485 int restoreCount = 0; 486 487 // For the fade. If view gets setAlpha(), use that instead. 488 int alpha = mAlpha; 489 if (alpha < 255) { 490 int sx = mScrollX; 491 restoreCount = canvas.saveLayerAlpha(sx, 0, sx+getWidth(), getHeight(), alpha, 492 Canvas.HAS_ALPHA_LAYER_SAVE_FLAG | Canvas.CLIP_TO_LAYER_SAVE_FLAG); 493 restore = true; 494 } 495 496 // ViewGroup.dispatchDraw() supports many features we don't need: 497 // clip to padding, layout animation, animation listener, disappearing 498 // children, etc. The following implementation attempts to fast-track 499 // the drawing dispatch by drawing only what we know needs to be drawn. 500 501 boolean fastDraw = mTouchState != TOUCH_STATE_SCROLLING && mNextScreen == INVALID_SCREEN; 502 // If we are not scrolling or flinging, draw only the current screen 503 if (fastDraw) { 504 drawChild(canvas, getChildAt(mCurrentScreen), getDrawingTime()); 505 } else { 506 final long drawingTime = getDrawingTime(); 507 // If we are flinging, draw only the current screen and the target screen 508 if (mNextScreen >= 0 && mNextScreen < getChildCount() && 509 Math.abs(mCurrentScreen - mNextScreen) == 1) { 510 drawChild(canvas, getChildAt(mCurrentScreen), drawingTime); 511 drawChild(canvas, getChildAt(mNextScreen), drawingTime); 512 } else { 513 // If we are scrolling, draw all of our children 514 final int count = getChildCount(); 515 for (int i = 0; i < count; i++) { 516 drawChild(canvas, getChildAt(i), drawingTime); 517 } 518 } 519 } 520 521 if (restore) { 522 canvas.restoreToCount(restoreCount); 523 } 524 } 525 526 protected void onAttachedToWindow() { 527 super.onAttachedToWindow(); 528 mDragController.setWindowToken(getWindowToken()); 529 } 530 531 @Override 532 protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { 533 super.onMeasure(widthMeasureSpec, heightMeasureSpec); 534 535 final int width = MeasureSpec.getSize(widthMeasureSpec); 536 final int widthMode = MeasureSpec.getMode(widthMeasureSpec); 537 if (widthMode != MeasureSpec.EXACTLY) { 538 throw new IllegalStateException("Workspace can only be used in EXACTLY mode."); 539 } 540 541 final int heightMode = MeasureSpec.getMode(heightMeasureSpec); 542 if (heightMode != MeasureSpec.EXACTLY) { 543 throw new IllegalStateException("Workspace can only be used in EXACTLY mode."); 544 } 545 546 // The children are given the same width and height as the workspace 547 final int count = getChildCount(); 548 for (int i = 0; i < count; i++) { 549 getChildAt(i).measure(widthMeasureSpec, heightMeasureSpec); 550 } 551 552 if (mFirstLayout) { 553 scrollTo(mCurrentScreen * width, 0); 554 updateWallpaperOffset(width * (getChildCount() - 1)); 555 mFirstLayout = false; 556 } 557 } 558 559 @Override 560 protected void onLayout(boolean changed, int left, int top, int right, int bottom) { 561 int childLeft = 0; 562 563 final int count = getChildCount(); 564 for (int i = 0; i < count; i++) { 565 final View child = getChildAt(i); 566 if (child.getVisibility() != View.GONE) { 567 final int childWidth = child.getMeasuredWidth(); 568 child.layout(childLeft, 0, childLeft + childWidth, child.getMeasuredHeight()); 569 childLeft += childWidth; 570 } 571 } 572 } 573 574 @Override 575 public boolean requestChildRectangleOnScreen(View child, Rect rectangle, boolean immediate) { 576 int screen = indexOfChild(child); 577 if (screen != mCurrentScreen || !mScroller.isFinished()) { 578 if (!mLauncher.isWorkspaceLocked()) { 579 snapToScreen(screen); 580 } 581 return true; 582 } 583 return false; 584 } 585 586 @Override 587 protected boolean onRequestFocusInDescendants(int direction, Rect previouslyFocusedRect) { 588 if (mLauncher.isDrawerDown()) { 589 final Folder openFolder = getOpenFolder(); 590 if (openFolder != null) { 591 return openFolder.requestFocus(direction, previouslyFocusedRect); 592 } else { 593 int focusableScreen; 594 if (mNextScreen != INVALID_SCREEN) { 595 focusableScreen = mNextScreen; 596 } else { 597 focusableScreen = mCurrentScreen; 598 } 599 getChildAt(focusableScreen).requestFocus(direction, previouslyFocusedRect); 600 } 601 } 602 return false; 603 } 604 605 @Override 606 public boolean dispatchUnhandledMove(View focused, int direction) { 607 if (direction == View.FOCUS_LEFT) { 608 if (getCurrentScreen() > 0) { 609 snapToScreen(getCurrentScreen() - 1); 610 return true; 611 } 612 } else if (direction == View.FOCUS_RIGHT) { 613 if (getCurrentScreen() < getChildCount() - 1) { 614 snapToScreen(getCurrentScreen() + 1); 615 return true; 616 } 617 } 618 return super.dispatchUnhandledMove(focused, direction); 619 } 620 621 @Override 622 public void addFocusables(ArrayList<View> views, int direction, int focusableMode) { 623 if (mLauncher.isDrawerDown()) { 624 final Folder openFolder = getOpenFolder(); 625 if (openFolder == null) { 626 getChildAt(mCurrentScreen).addFocusables(views, direction); 627 if (direction == View.FOCUS_LEFT) { 628 if (mCurrentScreen > 0) { 629 getChildAt(mCurrentScreen - 1).addFocusables(views, direction); 630 } 631 } else if (direction == View.FOCUS_RIGHT){ 632 if (mCurrentScreen < getChildCount() - 1) { 633 getChildAt(mCurrentScreen + 1).addFocusables(views, direction); 634 } 635 } 636 } else { 637 openFolder.addFocusables(views, direction); 638 } 639 } 640 } 641 642 @Override 643 public boolean onInterceptTouchEvent(MotionEvent ev) { 644 if (mLocked || !mLauncher.isDrawerDown()) { 645 return true; 646 } 647 648 /* 649 * This method JUST determines whether we want to intercept the motion. 650 * If we return true, onTouchEvent will be called and we do the actual 651 * scrolling there. 652 */ 653 654 /* 655 * Shortcut the most recurring case: the user is in the dragging 656 * state and he is moving his finger. We want to intercept this 657 * motion. 658 */ 659 final int action = ev.getAction(); 660 if ((action == MotionEvent.ACTION_MOVE) && (mTouchState != TOUCH_STATE_REST)) { 661 return true; 662 } 663 664 final float x = ev.getX(); 665 final float y = ev.getY(); 666 667 switch (action) { 668 case MotionEvent.ACTION_MOVE: 669 /* 670 * mIsBeingDragged == false, otherwise the shortcut would have caught it. Check 671 * whether the user has moved far enough from his original down touch. 672 */ 673 674 /* 675 * Locally do absolute value. mLastMotionX is set to the y value 676 * of the down event. 677 */ 678 final int xDiff = (int) Math.abs(x - mLastMotionX); 679 final int yDiff = (int) Math.abs(y - mLastMotionY); 680 681 final int touchSlop = mTouchSlop; 682 boolean xMoved = xDiff > touchSlop; 683 boolean yMoved = yDiff > touchSlop; 684 685 if (xMoved || yMoved) { 686 687 if (xMoved) { 688 // Scroll if the user moved far enough along the X axis 689 mTouchState = TOUCH_STATE_SCROLLING; 690 enableChildrenCache(); 691 } 692 // Either way, cancel any pending longpress 693 if (mAllowLongPress) { 694 mAllowLongPress = false; 695 // Try canceling the long press. It could also have been scheduled 696 // by a distant descendant, so use the mAllowLongPress flag to block 697 // everything 698 final View currentScreen = getChildAt(mCurrentScreen); 699 currentScreen.cancelLongPress(); 700 } 701 } 702 break; 703 704 case MotionEvent.ACTION_DOWN: 705 // Remember location of down touch 706 mLastMotionX = x; 707 mLastMotionY = y; 708 mAllowLongPress = true; 709 710 /* 711 * If being flinged and user touches the screen, initiate drag; 712 * otherwise don't. mScroller.isFinished should be false when 713 * being flinged. 714 */ 715 mTouchState = mScroller.isFinished() ? TOUCH_STATE_REST : TOUCH_STATE_SCROLLING; 716 break; 717 718 case MotionEvent.ACTION_CANCEL: 719 case MotionEvent.ACTION_UP: 720 // Release the drag 721 clearChildrenCache(); 722 mTouchState = TOUCH_STATE_REST; 723 mAllowLongPress = false; 724 break; 725 } 726 727 /* 728 * The only time we want to intercept motion events is if we are in the 729 * drag mode. 730 */ 731 return mTouchState != TOUCH_STATE_REST; 732 } 733 734 void enableChildrenCache() { 735 final int count = getChildCount(); 736 for (int i = 0; i < count; i++) { 737 final CellLayout layout = (CellLayout) getChildAt(i); 738 layout.setChildrenDrawnWithCacheEnabled(true); 739 layout.setChildrenDrawingCacheEnabled(true); 740 } 741 } 742 743 void clearChildrenCache() { 744 final int count = getChildCount(); 745 for (int i = 0; i < count; i++) { 746 final CellLayout layout = (CellLayout) getChildAt(i); 747 layout.setChildrenDrawnWithCacheEnabled(false); 748 } 749 } 750 751 @Override 752 public boolean onTouchEvent(MotionEvent ev) { 753 754 if (mLocked || !mLauncher.isDrawerDown()) { 755 return true; 756 } 757 758 if (mVelocityTracker == null) { 759 mVelocityTracker = VelocityTracker.obtain(); 760 } 761 mVelocityTracker.addMovement(ev); 762 763 final int action = ev.getAction(); 764 final float x = ev.getX(); 765 766 switch (action) { 767 case MotionEvent.ACTION_DOWN: 768 /* 769 * If being flinged and user touches, stop the fling. isFinished 770 * will be false if being flinged. 771 */ 772 if (!mScroller.isFinished()) { 773 mScroller.abortAnimation(); 774 } 775 776 // Remember where the motion event started 777 mLastMotionX = x; 778 break; 779 case MotionEvent.ACTION_MOVE: 780 if (mTouchState == TOUCH_STATE_SCROLLING) { 781 // Scroll to follow the motion event 782 final int deltaX = (int) (mLastMotionX - x); 783 mLastMotionX = x; 784 785 if (deltaX < 0) { 786 if (mScrollX > 0) { 787 scrollBy(Math.max(-mScrollX, deltaX), 0); 788 updateWallpaperOffset(); 789 } 790 } else if (deltaX > 0) { 791 final int availableToScroll = getChildAt(getChildCount() - 1).getRight() - 792 mScrollX - getWidth(); 793 if (availableToScroll > 0) { 794 scrollBy(Math.min(availableToScroll, deltaX), 0); 795 updateWallpaperOffset(); 796 } 797 } 798 } 799 break; 800 case MotionEvent.ACTION_UP: 801 if (mTouchState == TOUCH_STATE_SCROLLING) { 802 final VelocityTracker velocityTracker = mVelocityTracker; 803 velocityTracker.computeCurrentVelocity(1000, mMaximumVelocity); 804 int velocityX = (int) velocityTracker.getXVelocity(); 805 806 if (velocityX > SNAP_VELOCITY && mCurrentScreen > 0) { 807 // Fling hard enough to move left 808 snapToScreen(mCurrentScreen - 1); 809 } else if (velocityX < -SNAP_VELOCITY && mCurrentScreen < getChildCount() - 1) { 810 // Fling hard enough to move right 811 snapToScreen(mCurrentScreen + 1); 812 } else { 813 snapToDestination(); 814 } 815 816 if (mVelocityTracker != null) { 817 mVelocityTracker.recycle(); 818 mVelocityTracker = null; 819 } 820 } 821 mTouchState = TOUCH_STATE_REST; 822 break; 823 case MotionEvent.ACTION_CANCEL: 824 mTouchState = TOUCH_STATE_REST; 825 } 826 827 return true; 828 } 829 830 private void snapToDestination() { 831 final int screenWidth = getWidth(); 832 final int whichScreen = (mScrollX + (screenWidth / 2)) / screenWidth; 833 834 snapToScreen(whichScreen); 835 } 836 837 void snapToScreen(int whichScreen) { 838 if (!mScroller.isFinished()) return; 839 840 clearVacantCache(); 841 enableChildrenCache(); 842 843 whichScreen = Math.max(0, Math.min(whichScreen, getChildCount() - 1)); 844 boolean changingScreens = whichScreen != mCurrentScreen; 845 846 mNextScreen = whichScreen; 847 848 View focusedChild = getFocusedChild(); 849 if (focusedChild != null && changingScreens && focusedChild == getChildAt(mCurrentScreen)) { 850 focusedChild.clearFocus(); 851 } 852 853 final int newX = whichScreen * getWidth(); 854 final int delta = newX - mScrollX; 855 mScroller.startScroll(mScrollX, 0, delta, 0, Math.abs(delta) * 2); 856 invalidate(); 857 } 858 859 void startDrag(CellLayout.CellInfo cellInfo) { 860 View child = cellInfo.cell; 861 862 // Make sure the drag was started by a long press as opposed to a long click. 863 // Note that Search takes focus when clicked rather than entering touch mode 864 if (!child.isInTouchMode() && !(child instanceof Search)) { 865 return; 866 } 867 868 mDragInfo = cellInfo; 869 mDragInfo.screen = mCurrentScreen; 870 871 CellLayout current = ((CellLayout) getChildAt(mCurrentScreen)); 872 873 current.onDragChild(child); 874 mDragController.startDrag(child, this, child.getTag(), DragController.DRAG_ACTION_MOVE); 875 invalidate(); 876 } 877 878 @Override 879 protected Parcelable onSaveInstanceState() { 880 final SavedState state = new SavedState(super.onSaveInstanceState()); 881 state.currentScreen = mCurrentScreen; 882 return state; 883 } 884 885 @Override 886 protected void onRestoreInstanceState(Parcelable state) { 887 SavedState savedState = (SavedState) state; 888 super.onRestoreInstanceState(savedState.getSuperState()); 889 if (savedState.currentScreen != -1) { 890 mCurrentScreen = savedState.currentScreen; 891 Launcher.setScreen(mCurrentScreen); 892 } 893 } 894 895 void addApplicationShortcut(ApplicationInfo info, CellLayout.CellInfo cellInfo) { 896 addApplicationShortcut(info, cellInfo, false); 897 } 898 899 void addApplicationShortcut(ApplicationInfo info, CellLayout.CellInfo cellInfo, 900 boolean insertAtFirst) { 901 final CellLayout layout = (CellLayout) getChildAt(cellInfo.screen); 902 final int[] result = new int[2]; 903 904 layout.cellToPoint(cellInfo.cellX, cellInfo.cellY, result); 905 onDropExternal(result[0], result[1], info, layout, insertAtFirst); 906 } 907 908 public void onDrop(DragSource source, int x, int y, int xOffset, int yOffset, 909 DragView dragView, Object dragInfo) { 910 final CellLayout cellLayout = getCurrentDropLayout(); 911 if (source != this) { 912 onDropExternal(x - xOffset, y - yOffset, dragInfo, cellLayout); 913 } else { 914 // Move internally 915 if (mDragInfo != null) { 916 final View cell = mDragInfo.cell; 917 if (mCurrentScreen != mDragInfo.screen) { 918 final CellLayout originalCellLayout = (CellLayout) getChildAt(mDragInfo.screen); 919 originalCellLayout.removeView(cell); 920 cellLayout.addView(cell); 921 } 922 mTargetCell = estimateDropCell(x - xOffset, y - yOffset, 923 mDragInfo.spanX, mDragInfo.spanY, cell, cellLayout, mTargetCell); 924 cellLayout.onDropChild(cell, mTargetCell); 925 926 final ItemInfo info = (ItemInfo)cell.getTag(); 927 CellLayout.LayoutParams lp = (CellLayout.LayoutParams) cell.getLayoutParams(); 928 LauncherModel.moveItemInDatabase(mLauncher, info, 929 LauncherSettings.Favorites.CONTAINER_DESKTOP, mCurrentScreen, lp.cellX, lp.cellY); 930 } 931 } 932 } 933 934 public void onDragEnter(DragSource source, int x, int y, int xOffset, int yOffset, 935 DragView dragView, Object dragInfo) { 936 clearVacantCache(); 937 } 938 939 public void onDragOver(DragSource source, int x, int y, int xOffset, int yOffset, 940 DragView dragView, Object dragInfo) { 941 } 942 943 public void onDragExit(DragSource source, int x, int y, int xOffset, int yOffset, 944 DragView dragView, Object dragInfo) { 945 clearVacantCache(); 946 } 947 948 private void onDropExternal(int x, int y, Object dragInfo, CellLayout cellLayout) { 949 onDropExternal(x, y, dragInfo, cellLayout, false); 950 } 951 952 private void onDropExternal(int x, int y, Object dragInfo, CellLayout cellLayout, 953 boolean insertAtFirst) { 954 // Drag from somewhere else 955 ItemInfo info = (ItemInfo) dragInfo; 956 957 View view; 958 959 switch (info.itemType) { 960 case LauncherSettings.Favorites.ITEM_TYPE_APPLICATION: 961 case LauncherSettings.Favorites.ITEM_TYPE_SHORTCUT: 962 if (info.container == NO_ID) { 963 // Came from all apps -- make a copy 964 info = new ApplicationInfo((ApplicationInfo) info); 965 } 966 view = mLauncher.createShortcut(R.layout.application, cellLayout, 967 (ApplicationInfo) info); 968 break; 969 case LauncherSettings.Favorites.ITEM_TYPE_USER_FOLDER: 970 view = FolderIcon.fromXml(R.layout.folder_icon, mLauncher, 971 (ViewGroup) getChildAt(mCurrentScreen), ((UserFolderInfo) info)); 972 break; 973 default: 974 throw new IllegalStateException("Unknown item type: " + info.itemType); 975 } 976 977 cellLayout.addView(view, insertAtFirst ? 0 : -1); 978 view.setOnLongClickListener(mLongClickListener); 979 if (view instanceof DropTarget) { 980 mDragController.addDropTarget((DropTarget)view); 981 } 982 983 mTargetCell = estimateDropCell(x, y, 1, 1, view, cellLayout, mTargetCell); 984 cellLayout.onDropChild(view, mTargetCell); 985 CellLayout.LayoutParams lp = (CellLayout.LayoutParams) view.getLayoutParams(); 986 987 final LauncherModel model = Launcher.getModel(); 988 model.addDesktopItem(info); 989 LauncherModel.addOrMoveItemInDatabase(mLauncher, info, 990 LauncherSettings.Favorites.CONTAINER_DESKTOP, mCurrentScreen, lp.cellX, lp.cellY); 991 } 992 993 /** 994 * Return the current {@link CellLayout}, correctly picking the destination 995 * screen while a scroll is in progress. 996 */ 997 private CellLayout getCurrentDropLayout() { 998 int index = mScroller.isFinished() ? mCurrentScreen : mNextScreen; 999 return (CellLayout) getChildAt(index); 1000 } 1001 1002 /** 1003 * {@inheritDoc} 1004 */ 1005 public boolean acceptDrop(DragSource source, int x, int y, 1006 int xOffset, int yOffset, DragView dragView, Object dragInfo) { 1007 final CellLayout layout = getCurrentDropLayout(); 1008 final CellLayout.CellInfo cellInfo = mDragInfo; 1009 final int spanX = cellInfo == null ? 1 : cellInfo.spanX; 1010 final int spanY = cellInfo == null ? 1 : cellInfo.spanY; 1011 1012 if (mVacantCache == null) { 1013 final View ignoreView = cellInfo == null ? null : cellInfo.cell; 1014 mVacantCache = layout.findAllVacantCells(null, ignoreView); 1015 } 1016 1017 return mVacantCache.findCellForSpan(mTempEstimate, spanX, spanY, false); 1018 } 1019 1020 /** 1021 * {@inheritDoc} 1022 */ 1023 public Rect estimateDropLocation(DragSource source, int x, int y, 1024 int xOffset, int yOffset, DragView dragView, Object dragInfo, Rect recycle) { 1025 final CellLayout layout = getCurrentDropLayout(); 1026 1027 final CellLayout.CellInfo cellInfo = mDragInfo; 1028 final int spanX = cellInfo == null ? 1 : cellInfo.spanX; 1029 final int spanY = cellInfo == null ? 1 : cellInfo.spanY; 1030 final View ignoreView = cellInfo == null ? null : cellInfo.cell; 1031 1032 final Rect location = recycle != null ? recycle : new Rect(); 1033 1034 // Find drop cell and convert into rectangle 1035 int[] dropCell = estimateDropCell(x - xOffset, y - yOffset, 1036 spanX, spanY, ignoreView, layout, mTempCell); 1037 1038 if (dropCell == null) { 1039 return null; 1040 } 1041 1042 layout.cellToPoint(dropCell[0], dropCell[1], mTempEstimate); 1043 location.left = mTempEstimate[0]; 1044 location.top = mTempEstimate[1]; 1045 1046 layout.cellToPoint(dropCell[0] + spanX, dropCell[1] + spanY, mTempEstimate); 1047 location.right = mTempEstimate[0]; 1048 location.bottom = mTempEstimate[1]; 1049 1050 return location; 1051 } 1052 1053 /** 1054 * Calculate the nearest cell where the given object would be dropped. 1055 */ 1056 private int[] estimateDropCell(int pixelX, int pixelY, 1057 int spanX, int spanY, View ignoreView, CellLayout layout, int[] recycle) { 1058 // Create vacant cell cache if none exists 1059 if (mVacantCache == null) { 1060 mVacantCache = layout.findAllVacantCells(null, ignoreView); 1061 } 1062 1063 // Find the best target drop location 1064 return layout.findNearestVacantArea(pixelX, pixelY, 1065 spanX, spanY, mVacantCache, recycle); 1066 } 1067 1068 void setLauncher(Launcher launcher) { 1069 mLauncher = launcher; 1070 } 1071 1072 public void setDragController(DragController dragController) { 1073 mDragController = dragController; 1074 } 1075 1076 public void onDropCompleted(View target, boolean success) { 1077 if (success){ 1078 if (target != this && mDragInfo != null) { 1079 final CellLayout cellLayout = (CellLayout) getChildAt(mDragInfo.screen); 1080 cellLayout.removeView(mDragInfo.cell); 1081 if (mDragInfo.cell instanceof DropTarget) { 1082 mDragController.removeDropTarget((DropTarget)mDragInfo.cell); 1083 } 1084 final Object tag = mDragInfo.cell.getTag(); 1085 Launcher.getModel().removeDesktopItem((ItemInfo) tag); 1086 } 1087 } else { 1088 if (mDragInfo != null) { 1089 final CellLayout cellLayout = (CellLayout) getChildAt(mDragInfo.screen); 1090 cellLayout.onDropAborted(mDragInfo.cell); 1091 } 1092 } 1093 1094 mDragInfo = null; 1095 } 1096 1097 public void scrollLeft() { 1098 clearVacantCache(); 1099 if (mNextScreen == INVALID_SCREEN && mCurrentScreen > 0 && mScroller.isFinished()) { 1100 snapToScreen(mCurrentScreen - 1); 1101 } 1102 } 1103 1104 public void scrollRight() { 1105 clearVacantCache(); 1106 if (mNextScreen == INVALID_SCREEN && mCurrentScreen < getChildCount() -1 && 1107 mScroller.isFinished()) { 1108 snapToScreen(mCurrentScreen + 1); 1109 } 1110 } 1111 1112 public int getScreenForView(View v) { 1113 int result = -1; 1114 if (v != null) { 1115 ViewParent vp = v.getParent(); 1116 int count = getChildCount(); 1117 for (int i = 0; i < count; i++) { 1118 if (vp == getChildAt(i)) { 1119 return i; 1120 } 1121 } 1122 } 1123 return result; 1124 } 1125 1126 /** 1127 * Find a search widget on the given screen 1128 */ 1129 private Search findSearchWidget(CellLayout screen) { 1130 final int count = screen.getChildCount(); 1131 for (int i = 0; i < count; i++) { 1132 View v = screen.getChildAt(i); 1133 if (v instanceof Search) { 1134 return (Search) v; 1135 } 1136 } 1137 return null; 1138 } 1139 1140 /** 1141 * Gets the first search widget on the current screen, if there is one. 1142 * Returns <code>null</code> otherwise. 1143 */ 1144 public Search findSearchWidgetOnCurrentScreen() { 1145 CellLayout currentScreen = (CellLayout)getChildAt(mCurrentScreen); 1146 return findSearchWidget(currentScreen); 1147 } 1148 1149 public Folder getFolderForTag(Object tag) { 1150 int screenCount = getChildCount(); 1151 for (int screen = 0; screen < screenCount; screen++) { 1152 CellLayout currentScreen = ((CellLayout) getChildAt(screen)); 1153 int count = currentScreen.getChildCount(); 1154 for (int i = 0; i < count; i++) { 1155 View child = currentScreen.getChildAt(i); 1156 CellLayout.LayoutParams lp = (CellLayout.LayoutParams) child.getLayoutParams(); 1157 if (lp.cellHSpan == 4 && lp.cellVSpan == 4 && child instanceof Folder) { 1158 Folder f = (Folder) child; 1159 if (f.getInfo() == tag) { 1160 return f; 1161 } 1162 } 1163 } 1164 } 1165 return null; 1166 } 1167 1168 public View getViewForTag(Object tag) { 1169 int screenCount = getChildCount(); 1170 for (int screen = 0; screen < screenCount; screen++) { 1171 CellLayout currentScreen = ((CellLayout) getChildAt(screen)); 1172 int count = currentScreen.getChildCount(); 1173 for (int i = 0; i < count; i++) { 1174 View child = currentScreen.getChildAt(i); 1175 if (child.getTag() == tag) { 1176 return child; 1177 } 1178 } 1179 } 1180 return null; 1181 } 1182 1183 /** 1184 * Unlocks the SlidingDrawer so that touch events are processed. 1185 * 1186 * @see #lock() 1187 */ 1188 public void unlock() { 1189 mLocked = false; 1190 } 1191 1192 /** 1193 * Locks the SlidingDrawer so that touch events are ignores. 1194 * 1195 * @see #unlock() 1196 */ 1197 public void lock() { 1198 mLocked = true; 1199 } 1200 1201 /** 1202 * @return True is long presses are still allowed for the current touch 1203 */ 1204 public boolean allowLongPress() { 1205 return mAllowLongPress; 1206 } 1207 1208 /** 1209 * Set true to allow long-press events to be triggered, usually checked by 1210 * {@link Launcher} to accept or block dpad-initiated long-presses. 1211 */ 1212 public void setAllowLongPress(boolean allowLongPress) { 1213 mAllowLongPress = allowLongPress; 1214 } 1215 1216 void removeShortcutsForPackage(String packageName) { 1217 final ArrayList<View> childrenToRemove = new ArrayList<View>(); 1218 final LauncherModel model = Launcher.getModel(); 1219 final int count = getChildCount(); 1220 1221 for (int i = 0; i < count; i++) { 1222 final CellLayout layout = (CellLayout) getChildAt(i); 1223 int childCount = layout.getChildCount(); 1224 1225 childrenToRemove.clear(); 1226 1227 for (int j = 0; j < childCount; j++) { 1228 final View view = layout.getChildAt(j); 1229 Object tag = view.getTag(); 1230 1231 if (tag instanceof ApplicationInfo) { 1232 final ApplicationInfo info = (ApplicationInfo) tag; 1233 // We need to check for ACTION_MAIN otherwise getComponent() might 1234 // return null for some shortcuts (for instance, for shortcuts to 1235 // web pages.) 1236 final Intent intent = info.intent; 1237 final ComponentName name = intent.getComponent(); 1238 1239 if (Intent.ACTION_MAIN.equals(intent.getAction()) && 1240 name != null && packageName.equals(name.getPackageName())) { 1241 model.removeDesktopItem(info); 1242 LauncherModel.deleteItemFromDatabase(mLauncher, info); 1243 childrenToRemove.add(view); 1244 } 1245 } else if (tag instanceof UserFolderInfo) { 1246 final UserFolderInfo info = (UserFolderInfo) tag; 1247 final ArrayList<ApplicationInfo> contents = info.contents; 1248 final ArrayList<ApplicationInfo> toRemove = new ArrayList<ApplicationInfo>(1); 1249 final int contentsCount = contents.size(); 1250 boolean removedFromFolder = false; 1251 1252 for (int k = 0; k < contentsCount; k++) { 1253 final ApplicationInfo appInfo = contents.get(k); 1254 final Intent intent = appInfo.intent; 1255 final ComponentName name = intent.getComponent(); 1256 1257 if (Intent.ACTION_MAIN.equals(intent.getAction()) && 1258 name != null && packageName.equals(name.getPackageName())) { 1259 toRemove.add(appInfo); 1260 LauncherModel.deleteItemFromDatabase(mLauncher, appInfo); 1261 removedFromFolder = true; 1262 } 1263 } 1264 1265 contents.removeAll(toRemove); 1266 if (removedFromFolder) { 1267 final Folder folder = getOpenFolder(); 1268 if (folder != null) folder.notifyDataSetChanged(); 1269 } 1270 } 1271 } 1272 1273 childCount = childrenToRemove.size(); 1274 for (int j = 0; j < childCount; j++) { 1275 View child = childrenToRemove.get(j); 1276 layout.removeViewInLayout(child); 1277 if (child instanceof DropTarget) { 1278 mDragController.removeDropTarget((DropTarget)child); 1279 } 1280 } 1281 1282 if (childCount > 0) { 1283 layout.requestLayout(); 1284 layout.invalidate(); 1285 } 1286 } 1287 } 1288 1289 void updateShortcutsForPackage(String packageName) { 1290 final int count = getChildCount(); 1291 for (int i = 0; i < count; i++) { 1292 final CellLayout layout = (CellLayout) getChildAt(i); 1293 int childCount = layout.getChildCount(); 1294 for (int j = 0; j < childCount; j++) { 1295 final View view = layout.getChildAt(j); 1296 Object tag = view.getTag(); 1297 if (tag instanceof ApplicationInfo) { 1298 ApplicationInfo info = (ApplicationInfo) tag; 1299 // We need to check for ACTION_MAIN otherwise getComponent() might 1300 // return null for some shortcuts (for instance, for shortcuts to 1301 // web pages.) 1302 final Intent intent = info.intent; 1303 final ComponentName name = intent.getComponent(); 1304 if (info.itemType == LauncherSettings.Favorites.ITEM_TYPE_APPLICATION && 1305 Intent.ACTION_MAIN.equals(intent.getAction()) && name != null && 1306 packageName.equals(name.getPackageName())) { 1307 1308 final Drawable icon = Launcher.getModel().getApplicationInfoIcon( 1309 mLauncher.getPackageManager(), info); 1310 if (icon != null && icon != info.icon) { 1311 info.icon.setCallback(null); 1312 info.icon = Utilities.createIconThumbnail(icon, mContext); 1313 info.filtered = true; 1314 ((TextView) view).setCompoundDrawablesWithIntrinsicBounds(null, 1315 info.icon, null, null); 1316 } 1317 } 1318 } 1319 } 1320 } 1321 } 1322 1323 void moveToDefaultScreen() { 1324 snapToScreen(mDefaultScreen); 1325 getChildAt(mDefaultScreen).requestFocus(); 1326 } 1327 1328 public static class SavedState extends BaseSavedState { 1329 int currentScreen = -1; 1330 1331 SavedState(Parcelable superState) { 1332 super(superState); 1333 } 1334 1335 private SavedState(Parcel in) { 1336 super(in); 1337 currentScreen = in.readInt(); 1338 } 1339 1340 @Override 1341 public void writeToParcel(Parcel out, int flags) { 1342 super.writeToParcel(out, flags); 1343 out.writeInt(currentScreen); 1344 } 1345 1346 public static final Parcelable.Creator<SavedState> CREATOR = 1347 new Parcelable.Creator<SavedState>() { 1348 public SavedState createFromParcel(Parcel in) { 1349 return new SavedState(in); 1350 } 1351 1352 public SavedState[] newArray(int size) { 1353 return new SavedState[size]; 1354 } 1355 }; 1356 } 1357 1358 void show() { 1359 mTween.start(true); 1360 } 1361 1362 void hide() { 1363 mTween.start(false); 1364 } 1365 1366 public void onTweenValueChanged(float value, float oldValue) { 1367 mAlpha = (int)(255*value); 1368 invalidate(); 1369 } 1370 1371 public void onTweenStarted() { 1372 // TODO: This conflicts with the cache for drawing. Ref count instead? 1373 // TODO: Don't cache all three. 1374 enableChildrenCache(); 1375 } 1376 1377 public void onTweenFinished() { 1378 // TODO: This conflicts with the cache for drawing. Ref count instead? 1379 // TODO: Don't cache all three. 1380 clearChildrenCache(); 1381 } 1382} 1383