Workspace.java revision 8c920dd3683d752aa4c43e964831ce53f9b72887
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 com.android.launcher.R; 20import com.android.launcher2.InstallWidgetReceiver.WidgetMimeTypeHandlerData; 21 22import android.animation.Animator; 23import android.animation.AnimatorListenerAdapter; 24import android.animation.AnimatorSet; 25import android.animation.ObjectAnimator; 26import android.animation.PropertyValuesHolder; 27import android.animation.TimeInterpolator; 28import android.animation.ValueAnimator; 29import android.animation.Animator.AnimatorListener; 30import android.animation.ValueAnimator.AnimatorUpdateListener; 31import android.app.AlertDialog; 32import android.app.WallpaperManager; 33import android.appwidget.AppWidgetManager; 34import android.appwidget.AppWidgetProviderInfo; 35import android.content.ClipData; 36import android.content.ClipDescription; 37import android.content.ComponentName; 38import android.content.Context; 39import android.content.Intent; 40import android.content.pm.PackageManager; 41import android.content.pm.ProviderInfo; 42import android.content.res.Resources; 43import android.content.res.TypedArray; 44import android.graphics.Bitmap; 45import android.graphics.Camera; 46import android.graphics.Canvas; 47import android.graphics.Matrix; 48import android.graphics.Paint; 49import android.graphics.Rect; 50import android.graphics.RectF; 51import android.graphics.Region.Op; 52import android.graphics.drawable.Drawable; 53import android.net.Uri; 54import android.os.IBinder; 55import android.os.Parcelable; 56import android.util.AttributeSet; 57import android.util.Log; 58import android.util.Pair; 59import android.view.Display; 60import android.view.DragEvent; 61import android.view.MotionEvent; 62import android.view.View; 63import android.view.animation.DecelerateInterpolator; 64import android.widget.TextView; 65import android.widget.Toast; 66 67import java.util.ArrayList; 68import java.util.HashSet; 69import java.util.List; 70 71/** 72 * The workspace is a wide area with a wallpaper and a finite number of pages. 73 * Each page contains a number of icons, folders or widgets the user can 74 * interact with. A workspace is meant to be used with a fixed width only. 75 */ 76public class Workspace extends SmoothPagedView 77 implements DropTarget, DragSource, DragScroller, View.OnTouchListener { 78 @SuppressWarnings({"UnusedDeclaration"}) 79 private static final String TAG = "Launcher.Workspace"; 80 81 // This is how much the workspace shrinks when we enter all apps or 82 // customization mode 83 private static final float SHRINK_FACTOR = 0.16f; 84 85 // How much the screens shrink when we enter spring loaded drag mode 86 private static final float SPRING_LOADED_DRAG_SHRINK_FACTOR = 0.7f; 87 88 // Y rotation to apply to the workspace screens 89 private static final float WORKSPACE_ROTATION = 12.5f; 90 91 // These are extra scale factors to apply to the mini home screens 92 // so as to achieve the desired transform 93 private static final float EXTRA_SCALE_FACTOR_0 = 0.972f; 94 private static final float EXTRA_SCALE_FACTOR_1 = 1.0f; 95 private static final float EXTRA_SCALE_FACTOR_2 = 1.10f; 96 97 private static final int CHILDREN_OUTLINE_FADE_OUT_DELAY = 0; 98 private static final int CHILDREN_OUTLINE_FADE_OUT_DURATION = 375; 99 private static final int CHILDREN_OUTLINE_FADE_IN_DURATION = 100; 100 101 private static final int BACKGROUND_FADE_OUT_DURATION = 350; 102 private static final int BACKGROUND_FADE_IN_DURATION = 350; 103 104 // These animators are used to fade the children's outlines 105 private ObjectAnimator mChildrenOutlineFadeInAnimation; 106 private ObjectAnimator mChildrenOutlineFadeOutAnimation; 107 private float mChildrenOutlineAlpha = 0; 108 109 // These properties refer to the background protection gradient used for AllApps and Customize 110 private ObjectAnimator mBackgroundFadeInAnimation; 111 private ObjectAnimator mBackgroundFadeOutAnimation; 112 private Drawable mBackground; 113 private Drawable mCustomizeTrayBackground; 114 private boolean mDrawCustomizeTrayBackground; 115 private float mBackgroundAlpha = 0; 116 private float mOverScrollMaxBackgroundAlpha = 0.0f; 117 private int mOverScrollPageIndex = -1; 118 119 private View mCustomizationDrawer; 120 private View mCustomizationDrawerContent; 121 private int[] mCustomizationDrawerPos = new int[2]; 122 private float[] mCustomizationDrawerTransformedPos = new float[2]; 123 124 private final WallpaperManager mWallpaperManager; 125 126 private int mDefaultPage; 127 128 private boolean mPageMoving = false; 129 private boolean mIsDragInProcess = false; 130 131 /** 132 * CellInfo for the cell that is currently being dragged 133 */ 134 private CellLayout.CellInfo mDragInfo; 135 136 /** 137 * Target drop area calculated during last acceptDrop call. 138 */ 139 private int[] mTargetCell = null; 140 141 /** 142 * The CellLayout that is currently being dragged over 143 */ 144 private CellLayout mDragTargetLayout = null; 145 146 private Launcher mLauncher; 147 private IconCache mIconCache; 148 private DragController mDragController; 149 150 // These are temporary variables to prevent having to allocate a new object just to 151 // return an (x, y) value from helper functions. Do NOT use them to maintain other state. 152 private int[] mTempCell = new int[2]; 153 private int[] mTempEstimate = new int[2]; 154 private float[] mTempOriginXY = new float[2]; 155 private float[] mTempDragCoordinates = new float[2]; 156 private float[] mTempTouchCoordinates = new float[2]; 157 private float[] mTempCellLayoutCenterCoordinates = new float[2]; 158 private float[] mTempDragBottomRightCoordinates = new float[2]; 159 private Matrix mTempInverseMatrix = new Matrix(); 160 161 private SpringLoadedDragController mSpringLoadedDragController; 162 163 private static final int DEFAULT_CELL_COUNT_X = 4; 164 private static final int DEFAULT_CELL_COUNT_Y = 4; 165 166 private Drawable mPreviousIndicator; 167 private Drawable mNextIndicator; 168 169 // State variable that indicates whether the pages are small (ie when you're 170 // in all apps or customize mode) 171 private boolean mIsSmall = false; 172 private boolean mIsInUnshrinkAnimation = false; 173 private AnimatorListener mShrinkAnimationListener; 174 private AnimatorListener mUnshrinkAnimationListener; 175 enum ShrinkState { TOP, SPRING_LOADED, MIDDLE, BOTTOM_HIDDEN, BOTTOM_VISIBLE }; 176 private ShrinkState mShrinkState; 177 private boolean mWasSpringLoadedOnDragExit = false; 178 private boolean mWaitingToShrink = false; 179 private ShrinkState mWaitingToShrinkState; 180 private AnimatorSet mAnimator; 181 182 /** Is the user is dragging an item near the edge of a page? */ 183 private boolean mInScrollArea = false; 184 185 /** If mInScrollArea is true, the direction of the scroll. */ 186 private int mPendingScrollDirection = DragController.SCROLL_NONE; 187 188 private final HolographicOutlineHelper mOutlineHelper = new HolographicOutlineHelper(); 189 private Bitmap mDragOutline = null; 190 private final Rect mTempRect = new Rect(); 191 private final int[] mTempXY = new int[2]; 192 193 private ValueAnimator mDropAnim = null; 194 private TimeInterpolator mQuintEaseOutInterpolator = new DecelerateInterpolator(2.5f); 195 private View mDropView = null; 196 private int[] mDropViewPos = new int[] { -1, -1 }; 197 198 // Paint used to draw external drop outline 199 private final Paint mExternalDragOutlinePaint = new Paint(); 200 201 // Camera and Matrix used to determine the final position of a neighboring CellLayout 202 private final Matrix mMatrix = new Matrix(); 203 private final Camera mCamera = new Camera(); 204 private final float mTempFloat2[] = new float[2]; 205 206 enum WallpaperVerticalOffset { TOP, MIDDLE, BOTTOM }; 207 int mWallpaperWidth; 208 int mWallpaperHeight; 209 WallpaperOffsetInterpolator mWallpaperOffset; 210 boolean mUpdateWallpaperOffsetImmediately = false; 211 boolean mSyncWallpaperOffsetWithScroll = true; 212 213 /** 214 * Used to inflate the Workspace from XML. 215 * 216 * @param context The application's context. 217 * @param attrs The attributes set containing the Workspace's customization values. 218 */ 219 public Workspace(Context context, AttributeSet attrs) { 220 this(context, attrs, 0); 221 } 222 223 /** 224 * Used to inflate the Workspace from XML. 225 * 226 * @param context The application's context. 227 * @param attrs The attributes set containing the Workspace's customization values. 228 * @param defStyle Unused. 229 */ 230 public Workspace(Context context, AttributeSet attrs, int defStyle) { 231 super(context, attrs, defStyle); 232 mContentIsRefreshable = false; 233 234 if (!LauncherApplication.isScreenXLarge()) { 235 mFadeInAdjacentScreens = false; 236 } 237 238 mWallpaperManager = WallpaperManager.getInstance(context); 239 240 TypedArray a = context.obtainStyledAttributes(attrs, 241 R.styleable.Workspace, defStyle, 0); 242 int cellCountX = a.getInt(R.styleable.Workspace_cellCountX, DEFAULT_CELL_COUNT_X); 243 int cellCountY = a.getInt(R.styleable.Workspace_cellCountY, DEFAULT_CELL_COUNT_Y); 244 mDefaultPage = a.getInt(R.styleable.Workspace_defaultScreen, 1); 245 a.recycle(); 246 247 LauncherModel.updateWorkspaceLayoutCells(cellCountX, cellCountY); 248 setHapticFeedbackEnabled(false); 249 250 initWorkspace(); 251 } 252 253 /** 254 * Initializes various states for this workspace. 255 */ 256 protected void initWorkspace() { 257 Context context = getContext(); 258 mCurrentPage = mDefaultPage; 259 Launcher.setScreen(mCurrentPage); 260 LauncherApplication app = (LauncherApplication)context.getApplicationContext(); 261 mIconCache = app.getIconCache(); 262 mExternalDragOutlinePaint.setAntiAlias(true); 263 setWillNotDraw(false); 264 265 try { 266 final Resources res = getResources(); 267 mBackground = res.getDrawable(R.drawable.all_apps_bg_gradient); 268 mCustomizeTrayBackground = res.getDrawable(R.drawable.customize_bg_gradient); 269 } catch (Resources.NotFoundException e) { 270 // In this case, we will skip drawing background protection 271 } 272 273 mUnshrinkAnimationListener = new AnimatorListenerAdapter() { 274 @Override 275 public void onAnimationStart(Animator animation) { 276 mIsInUnshrinkAnimation = true; 277 disableCacheUpdates(); 278 } 279 @Override 280 public void onAnimationEnd(Animator animation) { 281 mIsInUnshrinkAnimation = false; 282 mSyncWallpaperOffsetWithScroll = true; 283 if (mShrinkState != ShrinkState.SPRING_LOADED) { 284 mDrawCustomizeTrayBackground = false; 285 } 286 enableCacheUpdates(); 287 mAnimator = null; 288 } 289 }; 290 mShrinkAnimationListener = new AnimatorListenerAdapter() { 291 @Override 292 public void onAnimationStart(Animator animation) { 293 disableCacheUpdates(); 294 } 295 @Override 296 public void onAnimationEnd(Animator animation) { 297 enableCacheUpdates(); 298 mAnimator = null; 299 } 300 }; 301 mSnapVelocity = 600; 302 mWallpaperOffset = new WallpaperOffsetInterpolator(); 303 } 304 305 @Override 306 protected int getScrollMode() { 307 if (LauncherApplication.isScreenXLarge()) { 308 return SmoothPagedView.X_LARGE_MODE; 309 } else { 310 return SmoothPagedView.DEFAULT_MODE; 311 } 312 } 313 314 @Override 315 public void addView(View child, int index, LayoutParams params) { 316 if (!(child instanceof CellLayout)) { 317 throw new IllegalArgumentException("A Workspace can only have CellLayout children."); 318 } 319 ((CellLayout) child).setOnInterceptTouchListener(this); 320 super.addView(child, index, params); 321 } 322 323 @Override 324 public void addView(View child) { 325 if (!(child instanceof CellLayout)) { 326 throw new IllegalArgumentException("A Workspace can only have CellLayout children."); 327 } 328 ((CellLayout) child).setOnInterceptTouchListener(this); 329 super.addView(child); 330 } 331 332 @Override 333 public void addView(View child, int index) { 334 if (!(child instanceof CellLayout)) { 335 throw new IllegalArgumentException("A Workspace can only have CellLayout children."); 336 } 337 ((CellLayout) child).setOnInterceptTouchListener(this); 338 super.addView(child, index); 339 } 340 341 @Override 342 public void addView(View child, int width, int height) { 343 if (!(child instanceof CellLayout)) { 344 throw new IllegalArgumentException("A Workspace can only have CellLayout children."); 345 } 346 ((CellLayout) child).setOnInterceptTouchListener(this); 347 super.addView(child, width, height); 348 } 349 350 @Override 351 public void addView(View child, LayoutParams params) { 352 if (!(child instanceof CellLayout)) { 353 throw new IllegalArgumentException("A Workspace can only have CellLayout children."); 354 } 355 ((CellLayout) child).setOnInterceptTouchListener(this); 356 super.addView(child, params); 357 } 358 359 /** 360 * @return The open folder on the current screen, or null if there is none 361 */ 362 Folder getOpenFolder() { 363 CellLayout currentPage = (CellLayout) getChildAt(mCurrentPage); 364 int count = currentPage.getChildCount(); 365 for (int i = 0; i < count; i++) { 366 View child = currentPage.getChildAt(i); 367 if (child instanceof Folder) { 368 Folder folder = (Folder) child; 369 if (folder.getInfo().opened) 370 return folder; 371 } 372 } 373 return null; 374 } 375 376 ArrayList<Folder> getOpenFolders() { 377 final int screenCount = getChildCount(); 378 ArrayList<Folder> folders = new ArrayList<Folder>(screenCount); 379 380 for (int screen = 0; screen < screenCount; screen++) { 381 CellLayout currentPage = (CellLayout) getChildAt(screen); 382 int count = currentPage.getChildCount(); 383 for (int i = 0; i < count; i++) { 384 View child = currentPage.getChildAt(i); 385 if (child instanceof Folder) { 386 Folder folder = (Folder) child; 387 if (folder.getInfo().opened) 388 folders.add(folder); 389 break; 390 } 391 } 392 } 393 return folders; 394 } 395 396 boolean isDefaultPageShowing() { 397 return mCurrentPage == mDefaultPage; 398 } 399 400 /** 401 * Adds the specified child in the specified screen. The position and dimension of 402 * the child are defined by x, y, spanX and spanY. 403 * 404 * @param child The child to add in one of the workspace's screens. 405 * @param screen The screen in which to add the child. 406 * @param x The X position of the child in the screen's grid. 407 * @param y The Y position of the child in the screen's grid. 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 addInScreen(View child, int screen, int x, int y, int spanX, int spanY) { 412 addInScreen(child, screen, x, y, spanX, spanY, false); 413 } 414 415 void addInFullScreen(View child, int screen) { 416 addInScreen(child, screen, 0, 0, -1, -1); 417 } 418 419 /** 420 * Adds the specified child in the specified screen. The position and dimension of 421 * the child are defined by x, y, spanX and spanY. 422 * 423 * @param child The child to add in one of the workspace's screens. 424 * @param screen The screen in which to add the child. 425 * @param x The X position of the child in the screen's grid. 426 * @param y The Y position of the child in the screen's grid. 427 * @param spanX The number of cells spanned horizontally by the child. 428 * @param spanY The number of cells spanned vertically by the child. 429 * @param insert When true, the child is inserted at the beginning of the children list. 430 */ 431 void addInScreen(View child, int screen, int x, int y, int spanX, int spanY, boolean insert) { 432 if (screen < 0 || screen >= getChildCount()) { 433 Log.e(TAG, "The screen must be >= 0 and < " + getChildCount() 434 + " (was " + screen + "); skipping child"); 435 return; 436 } 437 438 final CellLayout group = (CellLayout) getChildAt(screen); 439 CellLayout.LayoutParams lp = (CellLayout.LayoutParams) child.getLayoutParams(); 440 if (lp == null) { 441 lp = new CellLayout.LayoutParams(x, y, spanX, spanY); 442 } else { 443 lp.cellX = x; 444 lp.cellY = y; 445 lp.cellHSpan = spanX; 446 lp.cellVSpan = spanY; 447 } 448 449 // Get the canonical child id to uniquely represent this view in this screen 450 int childId = LauncherModel.getCellLayoutChildId(-1, screen, x, y, spanX, spanY); 451 boolean markCellsAsOccupied = !(child instanceof Folder); 452 if (!group.addViewToCellLayout(child, insert ? 0 : -1, childId, lp, markCellsAsOccupied)) { 453 // TODO: This branch occurs when the workspace is adding views 454 // outside of the defined grid 455 // maybe we should be deleting these items from the LauncherModel? 456 Log.w(TAG, "Failed to add to item at (" + lp.cellX + "," + lp.cellY + ") to CellLayout"); 457 } 458 459 if (!(child instanceof Folder)) { 460 child.setHapticFeedbackEnabled(false); 461 child.setOnLongClickListener(mLongClickListener); 462 } 463 if (child instanceof DropTarget) { 464 mDragController.addDropTarget((DropTarget) child); 465 } 466 } 467 468 /** 469 * Check if the point (x, y) hits a given page. 470 */ 471 private boolean hitsPage(int index, float x, float y) { 472 final View page = getChildAt(index); 473 if (page != null) { 474 float[] localXY = { x, y }; 475 mapPointFromSelfToChild(page, localXY); 476 return (localXY[0] >= 0 && localXY[0] < page.getWidth() 477 && localXY[1] >= 0 && localXY[1] < page.getHeight()); 478 } 479 return false; 480 } 481 482 @Override 483 protected boolean hitsPreviousPage(float x, float y) { 484 // mNextPage is set to INVALID_PAGE whenever we are stationary. 485 // Calculating "next page" this way ensures that you scroll to whatever page you tap on 486 final int current = (mNextPage == INVALID_PAGE) ? mCurrentPage : mNextPage; 487 return hitsPage(current - 1, x, y); 488 } 489 490 @Override 491 protected boolean hitsNextPage(float x, float y) { 492 // mNextPage is set to INVALID_PAGE whenever we are stationary. 493 // Calculating "next page" this way ensures that you scroll to whatever page you tap on 494 final int current = (mNextPage == INVALID_PAGE) ? mCurrentPage : mNextPage; 495 return hitsPage(current + 1, x, y); 496 } 497 498 public boolean onTouch(View v, MotionEvent event) { 499 // this is an intercepted event being forwarded from a cell layout 500 if (mIsSmall || mIsInUnshrinkAnimation) { 501 // Only allow clicks on a CellLayout if it is visible 502 if (mShrinkState != ShrinkState.BOTTOM_HIDDEN) { 503 mLauncher.onWorkspaceClick((CellLayout) v); 504 } 505 return true; 506 } 507 return false; 508 } 509 510 protected void onWindowVisibilityChanged (int visibility) { 511 mLauncher.onWindowVisibilityChanged(visibility); 512 } 513 514 @Override 515 public boolean dispatchUnhandledMove(View focused, int direction) { 516 if (mIsSmall || mIsInUnshrinkAnimation) { 517 // when the home screens are shrunken, shouldn't allow side-scrolling 518 return false; 519 } 520 return super.dispatchUnhandledMove(focused, direction); 521 } 522 523 @Override 524 public boolean onInterceptTouchEvent(MotionEvent ev) { 525 if (mIsSmall || mIsInUnshrinkAnimation) { 526 if (mLauncher.isAllAppsVisible() && 527 mShrinkState == ShrinkState.BOTTOM_HIDDEN) { 528 // Intercept this event so we can show the workspace in full view 529 // when it is clicked on and it is small 530 return true; 531 } 532 return false; 533 } 534 return super.onInterceptTouchEvent(ev); 535 } 536 537 @Override 538 protected void determineScrollingStart(MotionEvent ev) { 539 if (!mIsSmall && !mIsInUnshrinkAnimation) super.determineScrollingStart(ev); 540 } 541 542 protected void onPageBeginMoving() { 543 if (mNextPage != INVALID_PAGE) { 544 // we're snapping to a particular screen 545 enableChildrenCache(mCurrentPage, mNextPage); 546 } else { 547 // this is when user is actively dragging a particular screen, they might 548 // swipe it either left or right (but we won't advance by more than one screen) 549 enableChildrenCache(mCurrentPage - 1, mCurrentPage + 1); 550 } 551 showOutlines(); 552 mPageMoving = true; 553 } 554 555 protected void onPageEndMoving() { 556 clearChildrenCache(); 557 // Hide the outlines, as long as we're not dragging 558 if (!mDragController.dragging()) { 559 hideOutlines(); 560 } 561 mOverScrollMaxBackgroundAlpha = 0.0f; 562 mOverScrollPageIndex = -1; 563 mPageMoving = false; 564 } 565 566 @Override 567 protected void notifyPageSwitchListener() { 568 super.notifyPageSwitchListener(); 569 570 if (mPreviousIndicator != null) { 571 // if we know the next page, we show the indication for it right away; it looks 572 // weird if the indicators are lagging 573 int page = mNextPage; 574 if (page == INVALID_PAGE) { 575 page = mCurrentPage; 576 } 577 mPreviousIndicator.setLevel(page); 578 mNextIndicator.setLevel(page); 579 } 580 Launcher.setScreen(mCurrentPage); 581 }; 582 583 // As a ratio of screen height, the total distance we want the parallax effect to span 584 // vertically 585 private float wallpaperTravelToScreenHeightRatio(int width, int height) { 586 return 1.1f; 587 } 588 589 // As a ratio of screen height, the total distance we want the parallax effect to span 590 // horizontally 591 private float wallpaperTravelToScreenWidthRatio(int width, int height) { 592 float aspectRatio = width / (float) height; 593 594 // At an aspect ratio of 16/10, the wallpaper parallax effect should span 1.5 * screen width 595 // At an aspect ratio of 10/16, the wallpaper parallax effect should span 1.2 * screen width 596 // We will use these two data points to extrapolate how much the wallpaper parallax effect 597 // to span (ie travel) at any aspect ratio: 598 599 final float ASPECT_RATIO_LANDSCAPE = 16/10f; 600 final float ASPECT_RATIO_PORTRAIT = 10/16f; 601 final float WALLPAPER_WIDTH_TO_SCREEN_RATIO_LANDSCAPE = 1.5f; 602 final float WALLPAPER_WIDTH_TO_SCREEN_RATIO_PORTRAIT = 1.2f; 603 604 // To find out the desired width at different aspect ratios, we use the following two 605 // formulas, where the coefficient on x is the aspect ratio (width/height): 606 // (16/10)x + y = 1.5 607 // (10/16)x + y = 1.2 608 // We solve for x and y and end up with a final formula: 609 final float x = 610 (WALLPAPER_WIDTH_TO_SCREEN_RATIO_LANDSCAPE - WALLPAPER_WIDTH_TO_SCREEN_RATIO_PORTRAIT) / 611 (ASPECT_RATIO_LANDSCAPE - ASPECT_RATIO_PORTRAIT); 612 final float y = WALLPAPER_WIDTH_TO_SCREEN_RATIO_PORTRAIT - x * ASPECT_RATIO_PORTRAIT; 613 return x * aspectRatio + y; 614 } 615 616 // The range of scroll values for Workspace 617 private int getScrollRange() { 618 return getChildOffset(getChildCount() - 1) - getChildOffset(0); 619 } 620 621 protected void setWallpaperDimension() { 622 Display display = mLauncher.getWindowManager().getDefaultDisplay(); 623 final int maxDim = Math.max(display.getWidth(), display.getHeight()); 624 final int minDim = Math.min(display.getWidth(), display.getHeight()); 625 626 // We need to ensure that there is enough extra space in the wallpaper for the intended 627 // parallax effects 628 mWallpaperWidth = (int) (maxDim * wallpaperTravelToScreenWidthRatio(maxDim, minDim)); 629 mWallpaperHeight = (int)(maxDim * wallpaperTravelToScreenHeightRatio(maxDim, minDim)); 630 mWallpaperManager.suggestDesiredDimensions(mWallpaperWidth, mWallpaperHeight); 631 } 632 633 public void setVerticalWallpaperOffset(float offset) { 634 mWallpaperOffset.setFinalY(offset); 635 } 636 public float getVerticalWallpaperOffset() { 637 return mWallpaperOffset.getCurrY(); 638 } 639 public void setHorizontalWallpaperOffset(float offset) { 640 mWallpaperOffset.setFinalX(offset); 641 } 642 public float getHorizontalWallpaperOffset() { 643 return mWallpaperOffset.getCurrX(); 644 } 645 646 private float wallpaperOffsetForCurrentScroll() { 647 Display display = mLauncher.getWindowManager().getDefaultDisplay(); 648 // The wallpaper travel width is how far, from left to right, the wallpaper will move 649 // at this orientation (for example, in portrait mode we don't move all the way to the 650 // edges of the wallpaper, or otherwise the parallax effect would be too strong) 651 int wallpaperTravelWidth = (int) (display.getWidth() * 652 wallpaperTravelToScreenWidthRatio(display.getWidth(), display.getHeight())); 653 654 // Account for overscroll: you only see the absolute edge of the wallpaper if 655 // you overscroll as far as you can in landscape mode 656 int overscrollOffset = (int) (maxOverScroll() * display.getWidth()); 657 float overscrollRatio = overscrollOffset / (float) getScrollRange(); 658 int scrollRangeWithOverscroll = getScrollRange() + 2 * overscrollOffset; 659 660 // Set wallpaper offset steps (1 / (number of screens - 1)) 661 // We have 3 vertical offset states (centered, and then top/bottom aligned 662 // for all apps/customize) 663 mWallpaperManager.setWallpaperOffsetSteps(1.0f / (getChildCount() - 1), 1.0f / (3 - 1)); 664 665 float scrollProgress = 666 mScrollX / (float) scrollRangeWithOverscroll + overscrollRatio; 667 float offsetInDips = wallpaperTravelWidth * scrollProgress + 668 (mWallpaperWidth - wallpaperTravelWidth) / 2; 669 float offset = offsetInDips / (float) mWallpaperWidth; 670 return offset; 671 } 672 private void syncWallpaperOffsetWithScroll() { 673 if (LauncherApplication.isScreenXLarge()) { 674 mWallpaperOffset.setFinalX(wallpaperOffsetForCurrentScroll()); 675 } 676 } 677 678 public void updateWallpaperOffsetImmediately() { 679 mUpdateWallpaperOffsetImmediately = true; 680 } 681 682 private void updateWallpaperOffsets() { 683 boolean updateNow = false; 684 boolean keepUpdating = true; 685 if (mUpdateWallpaperOffsetImmediately) { 686 updateNow = true; 687 keepUpdating = false; 688 mWallpaperOffset.jumpToFinal(); 689 mUpdateWallpaperOffsetImmediately = false; 690 } else { 691 updateNow = keepUpdating = mWallpaperOffset.computeScrollOffset(); 692 } 693 if (updateNow) { 694 IBinder token = getWindowToken(); 695 if (token != null) { 696 mWallpaperManager.setWallpaperOffsets(getWindowToken(), 697 mWallpaperOffset.getCurrX(), mWallpaperOffset.getCurrY()); 698 } 699 } 700 if (keepUpdating) { 701 invalidate(); 702 } 703 } 704 705 class WallpaperOffsetInterpolator { 706 float mFinalHorizontalWallpaperOffset = 0.0f; 707 float mFinalVerticalWallpaperOffset = 0.5f; 708 float mHorizontalWallpaperOffset = 0.0f; 709 float mVerticalWallpaperOffset = 0.5f; 710 long mLastWallpaperOffsetUpdateTime; 711 712 public WallpaperOffsetInterpolator() { 713 } 714 715 public boolean computeScrollOffset() { 716 if (Float.compare(mHorizontalWallpaperOffset, mFinalHorizontalWallpaperOffset) == 0 && 717 Float.compare(mVerticalWallpaperOffset, mFinalVerticalWallpaperOffset) == 0) { 718 return false; 719 } 720 Display display = mLauncher.getWindowManager().getDefaultDisplay(); 721 boolean isLandscape = display.getWidth() > display.getHeight(); 722 723 long currentTime = System.currentTimeMillis(); 724 long timeSinceLastUpdate = currentTime - mLastWallpaperOffsetUpdateTime; 725 timeSinceLastUpdate = Math.min((long) (1000/30f), timeSinceLastUpdate); 726 timeSinceLastUpdate = Math.max(1L, timeSinceLastUpdate); 727 // ie 75% in 100ms 728 float fractionToCatchUpIn1MsHorizontal = isLandscape ? 0.75f / 100 : 0.75f / 100; 729 float fractionToCatchUpIn1MsVertical = isLandscape ? 1.1f / 100 : 1.1f / 100; 730 731 final float UPDATE_THRESHOLD = 0.00001f; 732 float hOffsetDelta = mFinalHorizontalWallpaperOffset - mHorizontalWallpaperOffset; 733 float vOffsetDelta = mFinalVerticalWallpaperOffset - mVerticalWallpaperOffset; 734 boolean jumpToFinalValue = 735 Math.abs(hOffsetDelta / mFinalHorizontalWallpaperOffset) < UPDATE_THRESHOLD && 736 Math.abs(vOffsetDelta / mFinalVerticalWallpaperOffset) < UPDATE_THRESHOLD; 737 if (jumpToFinalValue) { 738 mHorizontalWallpaperOffset = mFinalHorizontalWallpaperOffset; 739 mVerticalWallpaperOffset = mFinalVerticalWallpaperOffset; 740 } else { 741 float percentToCatchUpVertical = 742 timeSinceLastUpdate * fractionToCatchUpIn1MsVertical; 743 float percentToCatchUpHorizontal = 744 timeSinceLastUpdate * fractionToCatchUpIn1MsHorizontal; 745 mHorizontalWallpaperOffset += percentToCatchUpHorizontal * hOffsetDelta; 746 mVerticalWallpaperOffset += percentToCatchUpVertical * vOffsetDelta; 747 } 748 mLastWallpaperOffsetUpdateTime = System.currentTimeMillis(); 749 return true; 750 } 751 752 public float getCurrX() { 753 return mHorizontalWallpaperOffset; 754 } 755 756 public float getFinalX() { 757 return mFinalHorizontalWallpaperOffset; 758 } 759 760 public float getCurrY() { 761 return mVerticalWallpaperOffset; 762 } 763 764 public float getFinalY() { 765 return mFinalVerticalWallpaperOffset; 766 } 767 768 public void setFinalX(float x) { 769 mFinalHorizontalWallpaperOffset = Math.max(0f, Math.min(x, 1.0f)); 770 } 771 772 public void setFinalY(float y) { 773 mFinalVerticalWallpaperOffset = Math.max(0f, Math.min(y, 1.0f)); 774 } 775 776 public void jumpToFinal() { 777 mHorizontalWallpaperOffset = mFinalHorizontalWallpaperOffset; 778 mVerticalWallpaperOffset = mFinalVerticalWallpaperOffset; 779 } 780 } 781 782 @Override 783 public void computeScroll() { 784 super.computeScroll(); 785 if (mSyncWallpaperOffsetWithScroll) { 786 syncWallpaperOffsetWithScroll(); 787 } 788 } 789 790 public void showOutlines() { 791 if (!mIsSmall && !mIsInUnshrinkAnimation) { 792 if (mChildrenOutlineFadeOutAnimation != null) mChildrenOutlineFadeOutAnimation.cancel(); 793 if (mChildrenOutlineFadeInAnimation != null) mChildrenOutlineFadeInAnimation.cancel(); 794 mChildrenOutlineFadeInAnimation = ObjectAnimator.ofFloat(this, "childrenOutlineAlpha", 1.0f); 795 mChildrenOutlineFadeInAnimation.setDuration(CHILDREN_OUTLINE_FADE_IN_DURATION); 796 mChildrenOutlineFadeInAnimation.start(); 797 } 798 } 799 800 public void hideOutlines() { 801 if (!mIsSmall && !mIsInUnshrinkAnimation) { 802 if (mChildrenOutlineFadeInAnimation != null) mChildrenOutlineFadeInAnimation.cancel(); 803 if (mChildrenOutlineFadeOutAnimation != null) mChildrenOutlineFadeOutAnimation.cancel(); 804 mChildrenOutlineFadeOutAnimation = ObjectAnimator.ofFloat(this, "childrenOutlineAlpha", 0.0f); 805 mChildrenOutlineFadeOutAnimation.setDuration(CHILDREN_OUTLINE_FADE_OUT_DURATION); 806 mChildrenOutlineFadeOutAnimation.setStartDelay(CHILDREN_OUTLINE_FADE_OUT_DELAY); 807 mChildrenOutlineFadeOutAnimation.start(); 808 } 809 } 810 811 public void setChildrenOutlineAlpha(float alpha) { 812 mChildrenOutlineAlpha = alpha; 813 for (int i = 0; i < getChildCount(); i++) { 814 CellLayout cl = (CellLayout) getChildAt(i); 815 cl.setBackgroundAlpha(alpha); 816 } 817 } 818 819 public float getChildrenOutlineAlpha() { 820 return mChildrenOutlineAlpha; 821 } 822 823 private void showBackgroundGradientForAllApps() { 824 showBackgroundGradient(); 825 mDrawCustomizeTrayBackground = false; 826 } 827 828 private void showBackgroundGradientForCustomizeTray() { 829 showBackgroundGradient(); 830 mDrawCustomizeTrayBackground = true; 831 } 832 833 private void showBackgroundGradient() { 834 if (mBackground == null) return; 835 if (mBackgroundFadeOutAnimation != null) mBackgroundFadeOutAnimation.cancel(); 836 if (mBackgroundFadeInAnimation != null) mBackgroundFadeInAnimation.cancel(); 837 mBackgroundFadeInAnimation = ObjectAnimator.ofFloat(this, "backgroundAlpha", 1.0f); 838 mBackgroundFadeInAnimation.setInterpolator(new DecelerateInterpolator(1.5f)); 839 mBackgroundFadeInAnimation.setDuration(BACKGROUND_FADE_IN_DURATION); 840 mBackgroundFadeInAnimation.start(); 841 } 842 843 private void hideBackgroundGradient() { 844 if (mBackground == null) return; 845 if (mBackgroundFadeInAnimation != null) mBackgroundFadeInAnimation.cancel(); 846 if (mBackgroundFadeOutAnimation != null) mBackgroundFadeOutAnimation.cancel(); 847 mBackgroundFadeOutAnimation = ObjectAnimator.ofFloat(this, "backgroundAlpha", 0.0f); 848 mBackgroundFadeOutAnimation.setInterpolator(new DecelerateInterpolator(1.5f)); 849 mBackgroundFadeOutAnimation.setDuration(BACKGROUND_FADE_OUT_DURATION); 850 mBackgroundFadeOutAnimation.start(); 851 } 852 853 public void setBackgroundAlpha(float alpha) { 854 mBackgroundAlpha = alpha; 855 invalidate(); 856 } 857 858 public float getBackgroundAlpha() { 859 return mBackgroundAlpha; 860 } 861 862 /** 863 * Due to 3D transformations, if two CellLayouts are theoretically touching each other, 864 * on the xy plane, when one is rotated along the y-axis, the gap between them is perceived 865 * as being larger. This method computes what offset the rotated view should be translated 866 * in order to minimize this perceived gap. 867 * @param degrees Angle of the view 868 * @param width Width of the view 869 * @param height Height of the view 870 * @return Offset to be used in a View.setTranslationX() call 871 */ 872 private float getOffsetXForRotation(float degrees, int width, int height) { 873 mMatrix.reset(); 874 mCamera.save(); 875 mCamera.rotateY(Math.abs(degrees)); 876 mCamera.getMatrix(mMatrix); 877 mCamera.restore(); 878 879 mMatrix.preTranslate(-width * 0.5f, -height * 0.5f); 880 mMatrix.postTranslate(width * 0.5f, height * 0.5f); 881 mTempFloat2[0] = width; 882 mTempFloat2[1] = height; 883 mMatrix.mapPoints(mTempFloat2); 884 return (width - mTempFloat2[0]) * (degrees > 0.0f ? 1.0f : -1.0f); 885 } 886 887 float backgroundAlphaInterpolator(float r) { 888 float pivotA = 0.1f; 889 float pivotB = 0.4f; 890 if (r < pivotA) { 891 return 0; 892 } else if (r > pivotB) { 893 return 1.0f; 894 } else { 895 return (r - pivotA)/(pivotB - pivotA); 896 } 897 } 898 899 float overScrollBackgroundAlphaInterpolator(float r) { 900 float threshold = 0.08f; 901 902 if (r > mOverScrollMaxBackgroundAlpha) { 903 mOverScrollMaxBackgroundAlpha = r; 904 } else if (r < mOverScrollMaxBackgroundAlpha) { 905 r = mOverScrollMaxBackgroundAlpha; 906 } 907 908 return Math.min(r / threshold, 1.0f); 909 } 910 911 @Override 912 protected void screenScrolled(int screenCenter) { 913 final int halfScreenSize = getMeasuredWidth() / 2; 914 915 for (int i = 0; i < getChildCount(); i++) { 916 CellLayout cl = (CellLayout) getChildAt(i); 917 if (cl != null) { 918 int totalDistance = getScaledMeasuredWidth(cl) + mPageSpacing; 919 int delta = screenCenter - (getChildOffset(i) - 920 getRelativeChildOffset(i) + halfScreenSize); 921 922 float scrollProgress = delta / (totalDistance * 1.0f); 923 scrollProgress = Math.min(scrollProgress, 1.0f); 924 scrollProgress = Math.max(scrollProgress, -1.0f); 925 926 // If the current page (i) is being overscrolled, we use a different 927 // set of rules for setting the background alpha multiplier. 928 if ((mScrollX < 0 && i == 0) || (mScrollX > mMaxScrollX && 929 i == getChildCount() -1 )) { 930 cl.setBackgroundAlphaMultiplier( 931 overScrollBackgroundAlphaInterpolator(Math.abs(scrollProgress))); 932 mOverScrollPageIndex = i; 933 } else if (mOverScrollPageIndex != i) { 934 cl.setBackgroundAlphaMultiplier( 935 backgroundAlphaInterpolator(Math.abs(scrollProgress))); 936 } 937 938 float rotation = WORKSPACE_ROTATION * scrollProgress; 939 float translationX = getOffsetXForRotation(rotation, cl.getWidth(), cl.getHeight()); 940 cl.setTranslationX(translationX); 941 942 cl.setRotationY(rotation); 943 } 944 } 945 } 946 947 protected void onAttachedToWindow() { 948 super.onAttachedToWindow(); 949 computeScroll(); 950 mDragController.setWindowToken(getWindowToken()); 951 } 952 953 @Override 954 protected void onLayout(boolean changed, int left, int top, int right, int bottom) { 955 if (mFirstLayout && mCurrentPage >= 0 && mCurrentPage < getChildCount()) { 956 mUpdateWallpaperOffsetImmediately = true; 957 } 958 super.onLayout(changed, left, top, right, bottom); 959 960 // if shrinkToBottom() is called on initialization, it has to be deferred 961 // until after the first call to onLayout so that it has the correct width 962 if (mWaitingToShrink) { 963 // shrink can trigger a synchronous onLayout call, so we 964 // post this to avoid a stack overflow / tangled onLayout calls 965 post(new Runnable() { 966 public void run() { 967 shrink(mWaitingToShrinkState, false); 968 mWaitingToShrink = false; 969 } 970 }); 971 } 972 973 if (LauncherApplication.isInPlaceRotationEnabled()) { 974 // When the device is rotated, the scroll position of the current screen 975 // needs to be refreshed 976 setCurrentPage(getCurrentPage()); 977 } 978 } 979 980 public void enableCacheUpdates() { 981 final int pageCount = getChildCount(); 982 for (int i = 0; i < pageCount; i++) { 983 final CellLayout page = (CellLayout) getChildAt(i); 984 page.enableCacheUpdates(); 985 } 986 } 987 988 public void disableCacheUpdates() { 989 final int pageCount = getChildCount(); 990 for (int i = 0; i < pageCount; i++) { 991 final CellLayout page = (CellLayout) getChildAt(i); 992 page.disableCacheUpdates(); 993 } 994 } 995 996 @Override 997 protected void onDraw(Canvas canvas) { 998 updateWallpaperOffsets(); 999 1000 // Draw the background gradient if necessary 1001 if (mBackground != null && mBackgroundAlpha > 0.0f) { 1002 int alpha = (int) (mBackgroundAlpha * 255); 1003 if (mDrawCustomizeTrayBackground) { 1004 // Find out where to offset the gradient for the customization tray content 1005 mCustomizationDrawer.getLocationOnScreen(mCustomizationDrawerPos); 1006 final Matrix m = mCustomizationDrawer.getMatrix(); 1007 mCustomizationDrawerTransformedPos[0] = 0.0f; 1008 mCustomizationDrawerTransformedPos[1] = mCustomizationDrawerContent.getTop(); 1009 m.mapPoints(mCustomizationDrawerTransformedPos); 1010 1011 // Draw the bg glow behind the gradient 1012 mCustomizeTrayBackground.setAlpha(alpha); 1013 mCustomizeTrayBackground.setBounds(mScrollX, 0, mScrollX + getMeasuredWidth(), 1014 getMeasuredHeight()); 1015 mCustomizeTrayBackground.draw(canvas); 1016 1017 // Draw the bg gradient 1018 final int offset = (int) (mCustomizationDrawerPos[1] + 1019 mCustomizationDrawerTransformedPos[1]); 1020 mBackground.setAlpha(alpha); 1021 mBackground.setBounds(mScrollX, offset, mScrollX + getMeasuredWidth(), 1022 offset + getMeasuredHeight()); 1023 mBackground.draw(canvas); 1024 } else { 1025 mBackground.setAlpha(alpha); 1026 mBackground.setBounds(mScrollX, 0, mScrollX + getMeasuredWidth(), 1027 getMeasuredHeight()); 1028 mBackground.draw(canvas); 1029 } 1030 } 1031 super.onDraw(canvas); 1032 } 1033 1034 @Override 1035 protected void dispatchDraw(Canvas canvas) { 1036 if (mIsSmall || mIsInUnshrinkAnimation) { 1037 // Draw all the workspaces if we're small 1038 final int pageCount = getChildCount(); 1039 final long drawingTime = getDrawingTime(); 1040 for (int i = 0; i < pageCount; i++) { 1041 final View page = (View) getChildAt(i); 1042 1043 drawChild(canvas, page, drawingTime); 1044 } 1045 } else { 1046 super.dispatchDraw(canvas); 1047 1048 final int width = getWidth(); 1049 final int height = getHeight(); 1050 1051 // In portrait orientation, draw the glowing edge when dragging to adjacent screens 1052 if (mInScrollArea && (height > width)) { 1053 final int pageHeight = getChildAt(0).getHeight(); 1054 1055 // This determines the height of the glowing edge: 90% of the page height 1056 final int padding = (int) ((height - pageHeight) * 0.5f + pageHeight * 0.1f); 1057 1058 final CellLayout leftPage = (CellLayout) getChildAt(mCurrentPage - 1); 1059 final CellLayout rightPage = (CellLayout) getChildAt(mCurrentPage + 1); 1060 1061 if (leftPage != null && leftPage.getIsDragOverlapping()) { 1062 final Drawable d = getResources().getDrawable(R.drawable.page_hover_left); 1063 d.setBounds(mScrollX, padding, mScrollX + d.getIntrinsicWidth(), height - padding); 1064 d.draw(canvas); 1065 } else if (rightPage != null && rightPage.getIsDragOverlapping()) { 1066 final Drawable d = getResources().getDrawable(R.drawable.page_hover_right); 1067 d.setBounds(mScrollX + width - d.getIntrinsicWidth(), padding, mScrollX + width, height - padding); 1068 d.draw(canvas); 1069 } 1070 } 1071 1072 if (mDropView != null) { 1073 // We are animating an item that was just dropped on the home screen. 1074 // Render its View in the current animation position. 1075 canvas.save(Canvas.MATRIX_SAVE_FLAG); 1076 final int xPos = mDropViewPos[0] - mDropView.getScrollX(); 1077 final int yPos = mDropViewPos[1] - mDropView.getScrollY(); 1078 canvas.translate(xPos, yPos); 1079 mDropView.draw(canvas); 1080 canvas.restore(); 1081 } 1082 } 1083 } 1084 1085 @Override 1086 protected boolean onRequestFocusInDescendants(int direction, Rect previouslyFocusedRect) { 1087 if (!mLauncher.isAllAppsVisible()) { 1088 final Folder openFolder = getOpenFolder(); 1089 if (openFolder != null) { 1090 return openFolder.requestFocus(direction, previouslyFocusedRect); 1091 } else { 1092 return super.onRequestFocusInDescendants(direction, previouslyFocusedRect); 1093 } 1094 } 1095 return false; 1096 } 1097 1098 @Override 1099 public void addFocusables(ArrayList<View> views, int direction, int focusableMode) { 1100 if (!mLauncher.isAllAppsVisible()) { 1101 final Folder openFolder = getOpenFolder(); 1102 if (openFolder != null) { 1103 openFolder.addFocusables(views, direction); 1104 } else { 1105 super.addFocusables(views, direction, focusableMode); 1106 } 1107 } 1108 } 1109 1110 @Override 1111 public boolean dispatchTouchEvent(MotionEvent ev) { 1112 if (ev.getAction() == MotionEvent.ACTION_DOWN) { 1113 // (In XLarge mode, the workspace is shrunken below all apps, and responds to taps 1114 // ie when you click on a mini-screen, it zooms back to that screen) 1115 if (!LauncherApplication.isScreenXLarge() && mLauncher.isAllAppsVisible()) { 1116 return false; 1117 } 1118 } 1119 1120 return super.dispatchTouchEvent(ev); 1121 } 1122 1123 void enableChildrenCache(int fromPage, int toPage) { 1124 if (fromPage > toPage) { 1125 final int temp = fromPage; 1126 fromPage = toPage; 1127 toPage = temp; 1128 } 1129 1130 final int screenCount = getChildCount(); 1131 1132 fromPage = Math.max(fromPage, 0); 1133 toPage = Math.min(toPage, screenCount - 1); 1134 1135 for (int i = fromPage; i <= toPage; i++) { 1136 final CellLayout layout = (CellLayout) getChildAt(i); 1137 layout.setChildrenDrawnWithCacheEnabled(true); 1138 layout.setChildrenDrawingCacheEnabled(true); 1139 } 1140 } 1141 1142 void clearChildrenCache() { 1143 final int screenCount = getChildCount(); 1144 for (int i = 0; i < screenCount; i++) { 1145 final CellLayout layout = (CellLayout) getChildAt(i); 1146 layout.setChildrenDrawnWithCacheEnabled(false); 1147 } 1148 } 1149 1150 @Override 1151 public boolean onTouchEvent(MotionEvent ev) { 1152 if (mLauncher.isAllAppsVisible()) { 1153 // Cancel any scrolling that is in progress. 1154 if (!mScroller.isFinished()) { 1155 mScroller.abortAnimation(); 1156 } 1157 setCurrentPage(mCurrentPage); 1158 1159 if (mShrinkState == ShrinkState.BOTTOM_HIDDEN) { 1160 mLauncher.showWorkspace(true); 1161 // Let the events fall through to the CellLayouts because if they are not 1162 // hit, then we get a crash due to a missing ACTION_DOWN touch event 1163 } 1164 1165 return false; // We don't want the events 1166 } 1167 1168 return super.onTouchEvent(ev); 1169 } 1170 1171 @Override 1172 protected void onWallpaperTap(MotionEvent ev) { 1173 final int[] position = mTempCell; 1174 getLocationOnScreen(position); 1175 1176 int pointerIndex = ev.getActionIndex(); 1177 position[0] += (int) ev.getX(pointerIndex); 1178 position[1] += (int) ev.getY(pointerIndex); 1179 1180 mWallpaperManager.sendWallpaperCommand(getWindowToken(), 1181 ev.getAction() == MotionEvent.ACTION_UP 1182 ? WallpaperManager.COMMAND_TAP : WallpaperManager.COMMAND_SECONDARY_TAP, 1183 position[0], position[1], 0, null); 1184 } 1185 1186 public boolean isSmall() { 1187 return mIsSmall; 1188 } 1189 1190 private float getYScaleForScreen(int screen) { 1191 int x = Math.abs(screen - 2); 1192 1193 // TODO: This should be generalized for use with arbitrary rotation angles. 1194 switch(x) { 1195 case 0: return EXTRA_SCALE_FACTOR_0; 1196 case 1: return EXTRA_SCALE_FACTOR_1; 1197 case 2: return EXTRA_SCALE_FACTOR_2; 1198 } 1199 return 1.0f; 1200 } 1201 1202 public void shrink(ShrinkState shrinkState) { 1203 shrink(shrinkState, true); 1204 } 1205 1206 // we use this to shrink the workspace for the all apps view and the customize view 1207 public void shrink(ShrinkState shrinkState, boolean animated) { 1208 if (mFirstLayout) { 1209 // (mFirstLayout == "first layout has not happened yet") 1210 // if we get a call to shrink() as part of our initialization (for example, if 1211 // Launcher is started in All Apps mode) then we need to wait for a layout call 1212 // to get our width so we can layout the mini-screen views correctly 1213 mWaitingToShrink = true; 1214 mWaitingToShrinkState = shrinkState; 1215 return; 1216 } 1217 // Stop any scrolling, move to the current page right away 1218 setCurrentPage((mNextPage != INVALID_PAGE) ? mNextPage : mCurrentPage); 1219 if (!mIsDragInProcess) { 1220 updateWhichPagesAcceptDrops(shrinkState); 1221 } 1222 1223 CellLayout currentPage = (CellLayout) getChildAt(mCurrentPage); 1224 if (currentPage == null) { 1225 Log.w(TAG, "currentPage is NULL! mCurrentPage " + mCurrentPage 1226 + " mNextPage " + mNextPage); 1227 return; 1228 } 1229 if (currentPage.getBackgroundAlphaMultiplier() < 1.0f) { 1230 currentPage.setBackgroundAlpha(0.0f); 1231 } 1232 currentPage.setBackgroundAlphaMultiplier(1.0f); 1233 1234 mIsSmall = true; 1235 mShrinkState = shrinkState; 1236 1237 // we intercept and reject all touch events when we're small, so be sure to reset the state 1238 mTouchState = TOUCH_STATE_REST; 1239 mActivePointerId = INVALID_POINTER; 1240 1241 final Resources res = getResources(); 1242 final int screenWidth = getWidth(); 1243 final int screenHeight = getHeight(); 1244 1245 // Making the assumption that all pages have the same width as the 0th 1246 final int pageWidth = getChildAt(0).getMeasuredWidth(); 1247 final int pageHeight = getChildAt(0).getMeasuredHeight(); 1248 1249 final int scaledPageWidth = (int) (SHRINK_FACTOR * pageWidth); 1250 final int scaledPageHeight = (int) (SHRINK_FACTOR * pageHeight); 1251 final float extraScaledSpacing = res.getDimension(R.dimen.smallScreenExtraSpacing); 1252 1253 final int screenCount = getChildCount(); 1254 float totalWidth = screenCount * scaledPageWidth + (screenCount - 1) * extraScaledSpacing; 1255 1256 boolean isPortrait = getMeasuredHeight() > getMeasuredWidth(); 1257 float newY = (isPortrait ? 1258 getResources().getDimension(R.dimen.allAppsSmallScreenVerticalMarginPortrait) : 1259 getResources().getDimension(R.dimen.allAppsSmallScreenVerticalMarginLandscape)); 1260 float finalAlpha = 1.0f; 1261 float extraShrinkFactor = 1.0f; 1262 1263 if (shrinkState == ShrinkState.BOTTOM_VISIBLE) { 1264 newY = screenHeight - newY - scaledPageHeight; 1265 } else if (shrinkState == ShrinkState.BOTTOM_HIDDEN) { 1266 // We shrink and disappear to nothing in the case of all apps 1267 // (which is when we shrink to the bottom) 1268 newY = screenHeight - newY - scaledPageHeight; 1269 finalAlpha = 0.0f; 1270 } else if (shrinkState == ShrinkState.MIDDLE) { 1271 newY = screenHeight / 2 - scaledPageHeight / 2; 1272 finalAlpha = 1.0f; 1273 } else if (shrinkState == ShrinkState.TOP) { 1274 newY = (isPortrait ? 1275 getResources().getDimension(R.dimen.customizeSmallScreenVerticalMarginPortrait) : 1276 getResources().getDimension(R.dimen.customizeSmallScreenVerticalMarginLandscape)); 1277 } 1278 1279 int duration; 1280 if (shrinkState == ShrinkState.BOTTOM_HIDDEN || shrinkState == ShrinkState.BOTTOM_VISIBLE) { 1281 duration = res.getInteger(R.integer.config_allAppsWorkspaceShrinkTime); 1282 } else { 1283 duration = res.getInteger(R.integer.config_customizeWorkspaceShrinkTime); 1284 } 1285 1286 // We animate all the screens to the centered position in workspace 1287 // At the same time, the screens become greyed/dimmed 1288 1289 // newX is initialized to the left-most position of the centered screens 1290 float newX = mScroller.getFinalX() + screenWidth / 2 - totalWidth / 2; 1291 1292 // We are going to scale about the center of the view, so we need to adjust the positions 1293 // of the views accordingly 1294 newX -= (pageWidth - scaledPageWidth) / 2.0f; 1295 newY -= (pageHeight - scaledPageHeight) / 2.0f; 1296 1297 if (mAnimator != null) { 1298 mAnimator.cancel(); 1299 } 1300 1301 mAnimator = new AnimatorSet(); 1302 for (int i = 0; i < screenCount; i++) { 1303 final CellLayout cl = (CellLayout) getChildAt(i); 1304 1305 float rotation = (-i + 2) * WORKSPACE_ROTATION; 1306 float rotationScaleX = (float) (1.0f / Math.cos(Math.PI * rotation / 180.0f)); 1307 float rotationScaleY = getYScaleForScreen(i); 1308 1309 if (animated) { 1310 ObjectAnimator animWithInterpolator = ObjectAnimator.ofPropertyValuesHolder(cl, 1311 PropertyValuesHolder.ofFloat("x", newX), 1312 PropertyValuesHolder.ofFloat("y", newY), 1313 PropertyValuesHolder.ofFloat("scaleX", 1314 SHRINK_FACTOR * rotationScaleX * extraShrinkFactor), 1315 PropertyValuesHolder.ofFloat("scaleY", 1316 SHRINK_FACTOR * rotationScaleY * extraShrinkFactor), 1317 PropertyValuesHolder.ofFloat("backgroundAlpha", finalAlpha), 1318 PropertyValuesHolder.ofFloat("alpha", finalAlpha), 1319 PropertyValuesHolder.ofFloat("rotationY", rotation)); 1320 1321 animWithInterpolator.setDuration(duration); 1322 animWithInterpolator.setInterpolator(mZoomOutInterpolator); 1323 mAnimator.playTogether(animWithInterpolator); 1324 } else { 1325 cl.setX((int)newX); 1326 cl.setY((int)newY); 1327 cl.setScaleX(SHRINK_FACTOR * rotationScaleX * extraShrinkFactor); 1328 cl.setScaleY(SHRINK_FACTOR * rotationScaleY * extraShrinkFactor); 1329 cl.setBackgroundAlpha(finalAlpha); 1330 cl.setAlpha(finalAlpha); 1331 cl.setRotationY(rotation); 1332 mShrinkAnimationListener.onAnimationEnd(null); 1333 } 1334 // increment newX for the next screen 1335 newX += scaledPageWidth + extraScaledSpacing; 1336 } 1337 1338 float wallpaperOffset = 0.5f; 1339 Display display = mLauncher.getWindowManager().getDefaultDisplay(); 1340 int wallpaperTravelHeight = (int) (display.getHeight() * 1341 wallpaperTravelToScreenHeightRatio(display.getWidth(), display.getHeight())); 1342 float offsetFromCenter = (wallpaperTravelHeight / (float) mWallpaperHeight) / 2f; 1343 switch (shrinkState) { 1344 case TOP: 1345 wallpaperOffset = 0.5f + offsetFromCenter; 1346 break; 1347 case MIDDLE: 1348 case SPRING_LOADED: 1349 wallpaperOffset = 0.5f; 1350 break; 1351 case BOTTOM_HIDDEN: 1352 case BOTTOM_VISIBLE: 1353 wallpaperOffset = 0.5f - offsetFromCenter; 1354 break; 1355 } 1356 1357 setLayoutScale(1.0f); 1358 if (animated) { 1359 mSyncWallpaperOffsetWithScroll = false; 1360 ObjectAnimator wallpaperAnim = ObjectAnimator.ofPropertyValuesHolder(this, 1361 PropertyValuesHolder.ofFloat("verticalWallpaperOffset", wallpaperOffset), 1362 PropertyValuesHolder.ofFloat("horizontalWallpaperOffset", 0.5f)); 1363 mAnimator.play(wallpaperAnim); 1364 1365 wallpaperAnim.setDuration(duration); 1366 wallpaperAnim.setInterpolator(mZoomOutInterpolator); 1367 mAnimator.addListener(mShrinkAnimationListener); 1368 mAnimator.start(); 1369 } else { 1370 setVerticalWallpaperOffset(wallpaperOffset); 1371 setHorizontalWallpaperOffset(0.5f); 1372 updateWallpaperOffsetImmediately(); 1373 } 1374 setChildrenDrawnWithCacheEnabled(true); 1375 1376 if (shrinkState == ShrinkState.TOP) { 1377 showBackgroundGradientForCustomizeTray(); 1378 } else { 1379 showBackgroundGradientForAllApps(); 1380 } 1381 } 1382 1383 /* 1384 * This interpolator emulates the rate at which the perceived scale of an object changes 1385 * as its distance from a camera increases. When this interpolator is applied to a scale 1386 * animation on a view, it evokes the sense that the object is shrinking due to moving away 1387 * from the camera. 1388 */ 1389 static class ZInterpolator implements TimeInterpolator { 1390 private float focalLength; 1391 1392 public ZInterpolator(float foc) { 1393 focalLength = foc; 1394 } 1395 1396 public float getInterpolation(float input) { 1397 return (1.0f - focalLength / (focalLength + input)) / 1398 (1.0f - focalLength / (focalLength + 1.0f)); 1399 } 1400 } 1401 1402 /* 1403 * The exact reverse of ZInterpolator. 1404 */ 1405 static class InverseZInterpolator implements TimeInterpolator { 1406 private ZInterpolator zInterpolator; 1407 public InverseZInterpolator(float foc) { 1408 zInterpolator = new ZInterpolator(foc); 1409 } 1410 public float getInterpolation(float input) { 1411 return 1 - zInterpolator.getInterpolation(1 - input); 1412 } 1413 } 1414 1415 /* 1416 * ZInterpolator compounded with an ease-out. 1417 */ 1418 static class ZoomOutInterpolator implements TimeInterpolator { 1419 private final ZInterpolator zInterpolator = new ZInterpolator(0.2f); 1420 private final DecelerateInterpolator decelerate = new DecelerateInterpolator(1.5f); 1421 1422 public float getInterpolation(float input) { 1423 return decelerate.getInterpolation(zInterpolator.getInterpolation(input)); 1424 } 1425 } 1426 1427 /* 1428 * InvereZInterpolator compounded with an ease-out. 1429 */ 1430 static class ZoomInInterpolator implements TimeInterpolator { 1431 private final InverseZInterpolator inverseZInterpolator = new InverseZInterpolator(0.35f); 1432 private final DecelerateInterpolator decelerate = new DecelerateInterpolator(3.0f); 1433 1434 public float getInterpolation(float input) { 1435 return decelerate.getInterpolation(inverseZInterpolator.getInterpolation(input)); 1436 } 1437 } 1438 1439 private final ZoomOutInterpolator mZoomOutInterpolator = new ZoomOutInterpolator(); 1440 private final ZoomInInterpolator mZoomInInterpolator = new ZoomInInterpolator(); 1441 1442 private void updateWhichPagesAcceptDrops(ShrinkState state) { 1443 updateWhichPagesAcceptDropsHelper(state, false, 1, 1); 1444 } 1445 1446 private void updateWhichPagesAcceptDropsDuringDrag(ShrinkState state, int spanX, int spanY) { 1447 updateWhichPagesAcceptDropsHelper(state, true, spanX, spanY); 1448 } 1449 1450 private void updateWhichPagesAcceptDropsHelper( 1451 ShrinkState state, boolean isDragHappening, int spanX, int spanY) { 1452 final int screenCount = getChildCount(); 1453 for (int i = 0; i < screenCount; i++) { 1454 CellLayout cl = (CellLayout) getChildAt(i); 1455 cl.setIsDragOccuring(isDragHappening); 1456 switch (state) { 1457 case TOP: 1458 cl.setIsDefaultDropTarget(i == mCurrentPage); 1459 case BOTTOM_HIDDEN: 1460 case BOTTOM_VISIBLE: 1461 case SPRING_LOADED: 1462 if (!isDragHappening) { 1463 // even if a drag isn't happening, we don't want to show a screen as 1464 // accepting drops if it doesn't have at least one free cell 1465 spanX = 1; 1466 spanY = 1; 1467 } 1468 // the page accepts drops if we can find at least one empty spot 1469 cl.setAcceptsDrops(cl.findCellForSpan(null, spanX, spanY)); 1470 break; 1471 default: 1472 throw new RuntimeException("Unhandled ShrinkState " + state); 1473 } 1474 } 1475 } 1476 1477 /* 1478 * 1479 * We call these methods (onDragStartedWithItemSpans/onDragStartedWithItemMinSize) whenever we 1480 * start a drag in Launcher, regardless of whether the drag has ever entered the Workspace 1481 * 1482 * These methods mark the appropriate pages as accepting drops (which alters their visual 1483 * appearance). 1484 * 1485 */ 1486 public void onDragStartedWithItemSpans(int spanX, int spanY, Bitmap b) { 1487 mIsDragInProcess = true; 1488 1489 final Canvas canvas = new Canvas(); 1490 1491 // We need to add extra padding to the bitmap to make room for the glow effect 1492 final int bitmapPadding = HolographicOutlineHelper.MAX_OUTER_BLUR_RADIUS; 1493 1494 // The outline is used to visualize where the item will land if dropped 1495 mDragOutline = createDragOutline(b, canvas, bitmapPadding); 1496 1497 updateWhichPagesAcceptDropsDuringDrag(mShrinkState, spanX, spanY); 1498 } 1499 1500 // we call this method whenever a drag and drop in Launcher finishes, even if Workspace was 1501 // never dragged over 1502 public void onDragStopped(boolean success) { 1503 // In the success case, DragController has already called onDragExit() 1504 if (!success) { 1505 doDragExit(); 1506 } 1507 mIsDragInProcess = false; 1508 updateWhichPagesAcceptDrops(mShrinkState); 1509 } 1510 1511 // We call this when we trigger an unshrink by clicking on the CellLayout cl 1512 public void unshrink(CellLayout clThatWasClicked) { 1513 unshrink(clThatWasClicked, false); 1514 } 1515 1516 public void unshrink(CellLayout clThatWasClicked, boolean springLoaded) { 1517 int newCurrentPage = indexOfChild(clThatWasClicked); 1518 if (mIsSmall) { 1519 if (springLoaded) { 1520 setLayoutScale(SPRING_LOADED_DRAG_SHRINK_FACTOR); 1521 } 1522 scrollToNewPageWithoutMovingPages(newCurrentPage); 1523 unshrink(true, springLoaded); 1524 } 1525 } 1526 1527 1528 public void enterSpringLoadedDragMode(CellLayout clThatWasClicked) { 1529 mShrinkState = ShrinkState.SPRING_LOADED; 1530 unshrink(clThatWasClicked, true); 1531 mDragTargetLayout.onDragEnter(); 1532 } 1533 1534 public void exitSpringLoadedDragMode(ShrinkState shrinkState) { 1535 shrink(shrinkState); 1536 if (mDragTargetLayout != null) { 1537 mDragTargetLayout.onDragExit(); 1538 } 1539 } 1540 1541 void unshrink(boolean animated) { 1542 unshrink(animated, false); 1543 } 1544 1545 void unshrink(boolean animated, boolean springLoaded) { 1546 mWaitingToShrink = false; 1547 if (mIsSmall) { 1548 float finalScaleFactor = 1.0f; 1549 float finalBackgroundAlpha = 0.0f; 1550 if (springLoaded) { 1551 finalScaleFactor = SPRING_LOADED_DRAG_SHRINK_FACTOR; 1552 finalBackgroundAlpha = 1.0f; 1553 } else { 1554 mIsSmall = false; 1555 } 1556 if (mAnimator != null) { 1557 mAnimator.cancel(); 1558 } 1559 1560 mAnimator = new AnimatorSet(); 1561 final int screenCount = getChildCount(); 1562 1563 final int duration = getResources().getInteger(R.integer.config_workspaceUnshrinkTime); 1564 for (int i = 0; i < screenCount; i++) { 1565 final CellLayout cl = (CellLayout)getChildAt(i); 1566 float finalAlphaValue = (i == mCurrentPage) ? 1.0f : 0.0f; 1567 float finalAlphaMultiplierValue = 1568 ((i == mCurrentPage) && (mShrinkState != ShrinkState.SPRING_LOADED)) ? 1569 0.0f : 1.0f; 1570 float rotation = 0.0f; 1571 1572 if (i < mCurrentPage) { 1573 rotation = WORKSPACE_ROTATION; 1574 } else if (i > mCurrentPage) { 1575 rotation = -WORKSPACE_ROTATION; 1576 } 1577 1578 float translation = getOffsetXForRotation(rotation, cl.getWidth(), cl.getHeight()); 1579 1580 if (animated) { 1581 ObjectAnimator animWithInterpolator = ObjectAnimator.ofPropertyValuesHolder(cl, 1582 PropertyValuesHolder.ofFloat("translationX", translation), 1583 PropertyValuesHolder.ofFloat("translationY", 0.0f), 1584 PropertyValuesHolder.ofFloat("scaleX", finalScaleFactor), 1585 PropertyValuesHolder.ofFloat("scaleY", finalScaleFactor), 1586 PropertyValuesHolder.ofFloat("backgroundAlpha", finalBackgroundAlpha), 1587 PropertyValuesHolder.ofFloat("backgroundAlphaMultiplier", 1588 finalAlphaMultiplierValue), 1589 PropertyValuesHolder.ofFloat("alpha", finalAlphaValue)); 1590 animWithInterpolator.setDuration(duration); 1591 animWithInterpolator.setInterpolator(mZoomInInterpolator); 1592 1593 ObjectAnimator rotationAnim = ObjectAnimator.ofPropertyValuesHolder(cl, 1594 PropertyValuesHolder.ofFloat("rotationY", rotation)); 1595 rotationAnim.setDuration(duration); 1596 rotationAnim.setInterpolator(new DecelerateInterpolator(2.0f)); 1597 1598 mAnimator.playTogether(animWithInterpolator, rotationAnim); 1599 } else { 1600 cl.setTranslationX(translation); 1601 cl.setTranslationY(0.0f); 1602 cl.setScaleX(finalScaleFactor); 1603 cl.setScaleY(finalScaleFactor); 1604 cl.setBackgroundAlpha(0.0f); 1605 cl.setBackgroundAlphaMultiplier(finalAlphaMultiplierValue); 1606 cl.setAlpha(finalAlphaValue); 1607 cl.setRotationY(rotation); 1608 mUnshrinkAnimationListener.onAnimationEnd(null); 1609 } 1610 } 1611 if (animated) { 1612 ObjectAnimator wallpaperAnim = ObjectAnimator.ofPropertyValuesHolder(this, 1613 PropertyValuesHolder.ofFloat( 1614 "verticalWallpaperOffset", 0.5f), 1615 PropertyValuesHolder.ofFloat( 1616 "horizontalWallpaperOffset", wallpaperOffsetForCurrentScroll())); 1617 mAnimator.play(wallpaperAnim); 1618 wallpaperAnim.setDuration(duration); 1619 wallpaperAnim.setInterpolator(mZoomInInterpolator); 1620 } else { 1621 setHorizontalWallpaperOffset(wallpaperOffsetForCurrentScroll()); 1622 setVerticalWallpaperOffset(0.5f); 1623 updateWallpaperOffsetImmediately(); 1624 } 1625 1626 if (animated) { 1627 // If we call this when we're not animated, onAnimationEnd is never called on 1628 // the listener; make sure we only use the listener when we're actually animating 1629 mAnimator.addListener(mUnshrinkAnimationListener); 1630 mAnimator.start(); 1631 } 1632 } 1633 1634 if (!springLoaded) { 1635 hideBackgroundGradient(); 1636 } 1637 } 1638 1639 /** 1640 * Draw the View v into the given Canvas. 1641 * 1642 * @param v the view to draw 1643 * @param destCanvas the canvas to draw on 1644 * @param padding the horizontal and vertical padding to use when drawing 1645 */ 1646 private void drawDragView(View v, Canvas destCanvas, int padding) { 1647 final Rect clipRect = mTempRect; 1648 v.getDrawingRect(clipRect); 1649 1650 // For a TextView, adjust the clip rect so that we don't include the text label 1651 if (v instanceof BubbleTextView) { 1652 final BubbleTextView tv = (BubbleTextView) v; 1653 clipRect.bottom = tv.getExtendedPaddingTop() - (int) BubbleTextView.PADDING_V + 1654 tv.getLayout().getLineTop(0); 1655 } else if (v instanceof TextView) { 1656 final TextView tv = (TextView) v; 1657 clipRect.bottom = tv.getExtendedPaddingTop() - tv.getCompoundDrawablePadding() + 1658 tv.getLayout().getLineTop(0); 1659 } 1660 1661 // Draw the View into the bitmap. 1662 // The translate of scrollX and scrollY is necessary when drawing TextViews, because 1663 // they set scrollX and scrollY to large values to achieve centered text 1664 1665 destCanvas.save(); 1666 destCanvas.translate(-v.getScrollX() + padding / 2, -v.getScrollY() + padding / 2); 1667 destCanvas.clipRect(clipRect, Op.REPLACE); 1668 v.draw(destCanvas); 1669 destCanvas.restore(); 1670 } 1671 1672 /** 1673 * Returns a new bitmap to be used as the object outline, e.g. to visualize the drop location. 1674 * Responsibility for the bitmap is transferred to the caller. 1675 */ 1676 private Bitmap createDragOutline(View v, Canvas canvas, int padding) { 1677 final int outlineColor = getResources().getColor(R.color.drag_outline_color); 1678 final Bitmap b = Bitmap.createBitmap( 1679 v.getWidth() + padding, v.getHeight() + padding, Bitmap.Config.ARGB_8888); 1680 1681 canvas.setBitmap(b); 1682 drawDragView(v, canvas, padding); 1683 mOutlineHelper.applyMediumExpensiveOutlineWithBlur(b, canvas, outlineColor, outlineColor); 1684 return b; 1685 } 1686 1687 /** 1688 * Returns a new bitmap to be used as the object outline, e.g. to visualize the drop location. 1689 * Responsibility for the bitmap is transferred to the caller. 1690 */ 1691 private Bitmap createDragOutline(Bitmap orig, Canvas canvas, int padding) { 1692 final int outlineColor = getResources().getColor(R.color.drag_outline_color); 1693 final Bitmap b = Bitmap.createBitmap( 1694 orig.getWidth() + padding, orig.getHeight() + padding, Bitmap.Config.ARGB_8888); 1695 1696 canvas.setBitmap(b); 1697 canvas.drawBitmap(orig, 0, 0, new Paint()); 1698 mOutlineHelper.applyMediumExpensiveOutlineWithBlur(b, canvas, outlineColor, outlineColor); 1699 1700 return b; 1701 } 1702 1703 /** 1704 * Creates a drag outline to represent a drop (that we don't have the actual information for 1705 * yet). May be changed in the future to alter the drop outline slightly depending on the 1706 * clip description mime data. 1707 */ 1708 private Bitmap createExternalDragOutline(Canvas canvas, int padding) { 1709 Resources r = getResources(); 1710 final int outlineColor = r.getColor(R.color.drag_outline_color); 1711 final int iconWidth = r.getDimensionPixelSize(R.dimen.workspace_cell_width); 1712 final int iconHeight = r.getDimensionPixelSize(R.dimen.workspace_cell_height); 1713 final int rectRadius = r.getDimensionPixelSize(R.dimen.external_drop_icon_rect_radius); 1714 final int inset = (int) (Math.min(iconWidth, iconHeight) * 0.2f); 1715 final Bitmap b = Bitmap.createBitmap( 1716 iconWidth + padding, iconHeight + padding, Bitmap.Config.ARGB_8888); 1717 1718 canvas.setBitmap(b); 1719 canvas.drawRoundRect(new RectF(inset, inset, iconWidth - inset, iconHeight - inset), 1720 rectRadius, rectRadius, mExternalDragOutlinePaint); 1721 mOutlineHelper.applyMediumExpensiveOutlineWithBlur(b, canvas, outlineColor, outlineColor); 1722 return b; 1723 } 1724 1725 /** 1726 * Returns a new bitmap to show when the given View is being dragged around. 1727 * Responsibility for the bitmap is transferred to the caller. 1728 */ 1729 private Bitmap createDragBitmap(View v, Canvas canvas, int padding) { 1730 final int outlineColor = getResources().getColor(R.color.drag_outline_color); 1731 final Bitmap b = Bitmap.createBitmap( 1732 mDragOutline.getWidth(), mDragOutline.getHeight(), Bitmap.Config.ARGB_8888); 1733 1734 canvas.setBitmap(b); 1735 canvas.drawBitmap(mDragOutline, 0, 0, null); 1736 drawDragView(v, canvas, padding); 1737 mOutlineHelper.applyOuterBlur(b, canvas, outlineColor); 1738 1739 return b; 1740 } 1741 1742 void startDrag(CellLayout.CellInfo cellInfo) { 1743 View child = cellInfo.cell; 1744 1745 // Make sure the drag was started by a long press as opposed to a long click. 1746 if (!child.isInTouchMode()) { 1747 return; 1748 } 1749 1750 mDragInfo = cellInfo; 1751 1752 CellLayout current = (CellLayout) getChildAt(cellInfo.screen); 1753 current.onDragChild(child); 1754 1755 child.clearFocus(); 1756 child.setPressed(false); 1757 1758 final Canvas canvas = new Canvas(); 1759 1760 // We need to add extra padding to the bitmap to make room for the glow effect 1761 final int bitmapPadding = HolographicOutlineHelper.MAX_OUTER_BLUR_RADIUS; 1762 1763 // The outline is used to visualize where the item will land if dropped 1764 mDragOutline = createDragOutline(child, canvas, bitmapPadding); 1765 1766 // The drag bitmap follows the touch point around on the screen 1767 final Bitmap b = createDragBitmap(child, canvas, bitmapPadding); 1768 1769 final int bmpWidth = b.getWidth(); 1770 final int bmpHeight = b.getHeight(); 1771 child.getLocationOnScreen(mTempXY); 1772 final int screenX = (int) mTempXY[0] + (child.getWidth() - bmpWidth) / 2; 1773 final int screenY = (int) mTempXY[1] + (child.getHeight() - bmpHeight) / 2; 1774 mLauncher.lockScreenOrientation(); 1775 mDragController.startDrag(b, screenX, screenY, 0, 0, bmpWidth, bmpHeight, this, 1776 child.getTag(), DragController.DRAG_ACTION_MOVE, null); 1777 b.recycle(); 1778 } 1779 1780 void addApplicationShortcut(ShortcutInfo info, int screen, int cellX, int cellY, 1781 boolean insertAtFirst, int intersectX, int intersectY) { 1782 final CellLayout cellLayout = (CellLayout) getChildAt(screen); 1783 View view = mLauncher.createShortcut(R.layout.application, cellLayout, (ShortcutInfo) info); 1784 1785 final int[] cellXY = new int[2]; 1786 cellLayout.findCellForSpanThatIntersects(cellXY, 1, 1, intersectX, intersectY); 1787 addInScreen(view, screen, cellXY[0], cellXY[1], 1, 1, insertAtFirst); 1788 LauncherModel.addOrMoveItemInDatabase(mLauncher, info, 1789 LauncherSettings.Favorites.CONTAINER_DESKTOP, screen, 1790 cellXY[0], cellXY[1]); 1791 } 1792 1793 private void setPositionForDropAnimation( 1794 View dragView, int dragViewX, int dragViewY, View parent, View child) { 1795 final CellLayout.LayoutParams lp = (CellLayout.LayoutParams) child.getLayoutParams(); 1796 1797 // Based on the position of the drag view, find the top left of the original view 1798 int viewX = dragViewX + (dragView.getWidth() - child.getWidth()) / 2; 1799 int viewY = dragViewY + (dragView.getHeight() - child.getHeight()) / 2; 1800 viewX += getResources().getInteger(R.integer.config_dragViewOffsetX); 1801 viewY += getResources().getInteger(R.integer.config_dragViewOffsetY); 1802 1803 // Set its old pos (in the new parent's coordinates); it will be animated 1804 // in animateViewIntoPosition after the next layout pass 1805 lp.oldX = viewX - (parent.getLeft() - mScrollX); 1806 lp.oldY = viewY - (parent.getTop() - mScrollY); 1807 } 1808 1809 /* 1810 * We should be careful that this method cannot result in any synchronous requestLayout() 1811 * calls, as it is called from onLayout(). 1812 */ 1813 public void animateViewIntoPosition(final View view) { 1814 final CellLayout parent = (CellLayout) view.getParent().getParent(); 1815 final CellLayout.LayoutParams lp = (CellLayout.LayoutParams) view.getLayoutParams(); 1816 1817 // Convert the animation params to be relative to the Workspace, not the CellLayout 1818 final int fromX = lp.oldX + parent.getLeft(); 1819 final int fromY = lp.oldY + parent.getTop(); 1820 1821 final int dx = lp.x - lp.oldX; 1822 final int dy = lp.y - lp.oldY; 1823 1824 // Calculate the duration of the animation based on the object's distance 1825 final float dist = (float) Math.sqrt(dx*dx + dy*dy); 1826 final Resources res = getResources(); 1827 final float maxDist = (float) res.getInteger(R.integer.config_dropAnimMaxDist); 1828 int duration = res.getInteger(R.integer.config_dropAnimMaxDuration); 1829 if (dist < maxDist) { 1830 duration *= mQuintEaseOutInterpolator.getInterpolation(dist / maxDist); 1831 } 1832 1833 if (mDropAnim != null) { 1834 mDropAnim.end(); 1835 } 1836 mDropAnim = new ValueAnimator(); 1837 mDropAnim.setInterpolator(mQuintEaseOutInterpolator); 1838 1839 // The view is invisible during the animation; we render it manually. 1840 mDropAnim.addListener(new AnimatorListenerAdapter() { 1841 public void onAnimationStart(Animator animation) { 1842 // Set this here so that we don't render it until the animation begins 1843 mDropView = view; 1844 } 1845 1846 public void onAnimationEnd(Animator animation) { 1847 if (mDropView != null) { 1848 mDropView.setVisibility(View.VISIBLE); 1849 mDropView = null; 1850 } 1851 } 1852 }); 1853 1854 mDropAnim.setDuration(duration); 1855 mDropAnim.setFloatValues(0.0f, 1.0f); 1856 mDropAnim.removeAllUpdateListeners(); 1857 mDropAnim.addUpdateListener(new AnimatorUpdateListener() { 1858 public void onAnimationUpdate(ValueAnimator animation) { 1859 final float percent = (Float) animation.getAnimatedValue(); 1860 // Invalidate the old position 1861 invalidate(mDropViewPos[0], mDropViewPos[1], 1862 mDropViewPos[0] + view.getWidth(), mDropViewPos[1] + view.getHeight()); 1863 1864 mDropViewPos[0] = fromX + (int) (percent * dx + 0.5f); 1865 mDropViewPos[1] = fromY + (int) (percent * dy + 0.5f); 1866 invalidate(mDropViewPos[0], mDropViewPos[1], 1867 mDropViewPos[0] + view.getWidth(), mDropViewPos[1] + view.getHeight()); 1868 } 1869 }); 1870 1871 mDropAnim.start(); 1872 } 1873 1874 /** 1875 * {@inheritDoc} 1876 */ 1877 public boolean acceptDrop(DragSource source, int x, int y, 1878 int xOffset, int yOffset, DragView dragView, Object dragInfo) { 1879 1880 // If it's an external drop (e.g. from All Apps), check if it should be accepted 1881 if (source != this) { 1882 // Don't accept the drop if we're not over a screen at time of drop 1883 if (mDragTargetLayout == null || !mDragTargetLayout.getAcceptsDrops()) { 1884 return false; 1885 } 1886 1887 final CellLayout.CellInfo dragCellInfo = mDragInfo; 1888 final int spanX = dragCellInfo == null ? 1 : dragCellInfo.spanX; 1889 final int spanY = dragCellInfo == null ? 1 : dragCellInfo.spanY; 1890 1891 final View ignoreView = dragCellInfo == null ? null : dragCellInfo.cell; 1892 1893 // Don't accept the drop if there's no room for the item 1894 if (!mDragTargetLayout.findCellForSpanIgnoring(null, spanX, spanY, ignoreView)) { 1895 mLauncher.showOutOfSpaceMessage(); 1896 return false; 1897 } 1898 } 1899 return true; 1900 } 1901 1902 public void onDrop(DragSource source, int x, int y, int xOffset, int yOffset, 1903 DragView dragView, Object dragInfo) { 1904 1905 int originX = x - xOffset; 1906 int originY = y - yOffset; 1907 1908 if (mIsSmall || mIsInUnshrinkAnimation) { 1909 // get originX and originY in the local coordinate system of the screen 1910 mTempOriginXY[0] = originX; 1911 mTempOriginXY[1] = originY; 1912 mapPointFromSelfToChild(mDragTargetLayout, mTempOriginXY); 1913 originX = (int)mTempOriginXY[0]; 1914 originY = (int)mTempOriginXY[1]; 1915 } 1916 1917 // When you drag to a particular screen, make that the new current/default screen, so any 1918 // subsequent taps add items to that screen 1919 int dragTargetIndex = indexOfChild(mDragTargetLayout); 1920 if (mCurrentPage != dragTargetIndex && (mIsSmall || mIsInUnshrinkAnimation)) { 1921 scrollToNewPageWithoutMovingPages(dragTargetIndex); 1922 } 1923 1924 if (source != this) { 1925 if (!mIsSmall || mWasSpringLoadedOnDragExit) { 1926 onDropExternal(originX, originY, dragInfo, mDragTargetLayout, false); 1927 } else { 1928 // if we drag and drop to small screens, don't pass the touch x/y coords (when we 1929 // enable spring-loaded adding, however, we do want to pass the touch x/y coords) 1930 onDropExternal(-1, -1, dragInfo, mDragTargetLayout, false); 1931 } 1932 } else if (mDragInfo != null) { 1933 final View cell = mDragInfo.cell; 1934 CellLayout dropTargetLayout = mDragTargetLayout; 1935 1936 // Handle the case where the user drops when in the scroll area. 1937 // This is treated as a drop on the adjacent page. 1938 if (dropTargetLayout == null && mInScrollArea) { 1939 if (mPendingScrollDirection == DragController.SCROLL_LEFT) { 1940 dropTargetLayout = (CellLayout) getChildAt(mCurrentPage - 1); 1941 } else if (mPendingScrollDirection == DragController.SCROLL_RIGHT) { 1942 dropTargetLayout = (CellLayout) getChildAt(mCurrentPage + 1); 1943 } 1944 } 1945 1946 if (dropTargetLayout != null) { 1947 // Move internally 1948 mTargetCell = findNearestVacantArea(originX, originY, 1949 mDragInfo.spanX, mDragInfo.spanY, cell, dropTargetLayout, 1950 mTargetCell); 1951 1952 final int screen = (mTargetCell == null) ? 1953 mDragInfo.screen : indexOfChild(dropTargetLayout); 1954 1955 if (screen != mCurrentPage) { 1956 snapToPage(screen); 1957 } 1958 1959 if (mTargetCell != null) { 1960 if (screen != mDragInfo.screen) { 1961 // Reparent the view 1962 ((CellLayout) getChildAt(mDragInfo.screen)).removeView(cell); 1963 addInScreen(cell, screen, mTargetCell[0], mTargetCell[1], 1964 mDragInfo.spanX, mDragInfo.spanY); 1965 } 1966 1967 // update the item's position after drop 1968 final ItemInfo info = (ItemInfo) cell.getTag(); 1969 CellLayout.LayoutParams lp = (CellLayout.LayoutParams) cell.getLayoutParams(); 1970 dropTargetLayout.onMove(cell, mTargetCell[0], mTargetCell[1]); 1971 lp.cellX = mTargetCell[0]; 1972 lp.cellY = mTargetCell[1]; 1973 cell.setId(LauncherModel.getCellLayoutChildId(-1, mDragInfo.screen, 1974 mTargetCell[0], mTargetCell[1], mDragInfo.spanX, mDragInfo.spanY)); 1975 1976 LauncherModel.moveItemInDatabase(mLauncher, info, 1977 LauncherSettings.Favorites.CONTAINER_DESKTOP, screen, 1978 lp.cellX, lp.cellY); 1979 } 1980 } 1981 1982 final CellLayout parent = (CellLayout) cell.getParent().getParent(); 1983 1984 // Prepare it to be animated into its new position 1985 // This must be called after the view has been re-parented 1986 setPositionForDropAnimation(dragView, originX, originY, parent, cell); 1987 boolean animateDrop = !mWasSpringLoadedOnDragExit; 1988 parent.onDropChild(cell, animateDrop); 1989 } 1990 } 1991 1992 public void onDragEnter(DragSource source, int x, int y, int xOffset, 1993 int yOffset, DragView dragView, Object dragInfo) { 1994 mDragTargetLayout = null; // Reset the drag state 1995 1996 if (!mIsSmall) { 1997 mDragTargetLayout = getCurrentDropLayout(); 1998 mDragTargetLayout.onDragEnter(); 1999 showOutlines(); 2000 } 2001 } 2002 2003 public DropTarget getDropTargetDelegate(DragSource source, int x, int y, 2004 int xOffset, int yOffset, DragView dragView, Object dragInfo) { 2005 2006 if (mIsSmall || mIsInUnshrinkAnimation) { 2007 // If we're shrunken, don't let anyone drag on folders/etc that are on the mini-screens 2008 return null; 2009 } 2010 // We may need to delegate the drag to a child view. If a 1x1 item 2011 // would land in a cell occupied by a DragTarget (e.g. a Folder), 2012 // then drag events should be handled by that child. 2013 2014 ItemInfo item = (ItemInfo)dragInfo; 2015 CellLayout currentLayout = getCurrentDropLayout(); 2016 2017 int dragPointX, dragPointY; 2018 if (item.spanX == 1 && item.spanY == 1) { 2019 // For a 1x1, calculate the drop cell exactly as in onDragOver 2020 dragPointX = x - xOffset; 2021 dragPointY = y - yOffset; 2022 } else { 2023 // Otherwise, use the exact drag coordinates 2024 dragPointX = x; 2025 dragPointY = y; 2026 } 2027 dragPointX += mScrollX - currentLayout.getLeft(); 2028 dragPointY += mScrollY - currentLayout.getTop(); 2029 2030 // If we are dragging over a cell that contains a DropTarget that will 2031 // accept the drop, delegate to that DropTarget. 2032 final int[] cellXY = mTempCell; 2033 currentLayout.estimateDropCell(dragPointX, dragPointY, item.spanX, item.spanY, cellXY); 2034 View child = currentLayout.getChildAt(cellXY[0], cellXY[1]); 2035 if (child instanceof DropTarget) { 2036 DropTarget target = (DropTarget)child; 2037 if (target.acceptDrop(source, x, y, xOffset, yOffset, dragView, dragInfo)) { 2038 return target; 2039 } 2040 } 2041 return null; 2042 } 2043 2044 /** 2045 * Tests to see if the drop will be accepted by Launcher, and if so, includes additional data 2046 * in the returned structure related to the widgets that match the drop (or a null list if it is 2047 * a shortcut drop). If the drop is not accepted then a null structure is returned. 2048 */ 2049 private Pair<Integer, List<WidgetMimeTypeHandlerData>> validateDrag(DragEvent event) { 2050 final LauncherModel model = mLauncher.getModel(); 2051 final ClipDescription desc = event.getClipDescription(); 2052 final int mimeTypeCount = desc.getMimeTypeCount(); 2053 for (int i = 0; i < mimeTypeCount; ++i) { 2054 final String mimeType = desc.getMimeType(i); 2055 if (mimeType.equals(InstallShortcutReceiver.SHORTCUT_MIMETYPE)) { 2056 return new Pair<Integer, List<WidgetMimeTypeHandlerData>>(i, null); 2057 } else { 2058 final List<WidgetMimeTypeHandlerData> widgets = 2059 model.resolveWidgetsForMimeType(mContext, mimeType); 2060 if (widgets.size() > 0) { 2061 return new Pair<Integer, List<WidgetMimeTypeHandlerData>>(i, widgets); 2062 } 2063 } 2064 } 2065 return null; 2066 } 2067 2068 /** 2069 * Global drag and drop handler 2070 */ 2071 @Override 2072 public boolean onDragEvent(DragEvent event) { 2073 final ClipDescription desc = event.getClipDescription(); 2074 final CellLayout layout = (CellLayout) getChildAt(mCurrentPage); 2075 final int[] pos = new int[2]; 2076 layout.getLocationOnScreen(pos); 2077 // We need to offset the drag coordinates to layout coordinate space 2078 final int x = (int) event.getX() - pos[0]; 2079 final int y = (int) event.getY() - pos[1]; 2080 2081 switch (event.getAction()) { 2082 case DragEvent.ACTION_DRAG_STARTED: { 2083 // Validate this drag 2084 Pair<Integer, List<WidgetMimeTypeHandlerData>> test = validateDrag(event); 2085 if (test != null) { 2086 boolean isShortcut = (test.second == null); 2087 if (isShortcut) { 2088 // Check if we have enough space on this screen to add a new shortcut 2089 if (!layout.findCellForSpan(pos, 1, 1)) { 2090 Toast.makeText(mContext, mContext.getString(R.string.out_of_space), 2091 Toast.LENGTH_SHORT).show(); 2092 return false; 2093 } 2094 } 2095 } else { 2096 // Show error message if we couldn't accept any of the items 2097 Toast.makeText(mContext, mContext.getString(R.string.external_drop_widget_error), 2098 Toast.LENGTH_SHORT).show(); 2099 return false; 2100 } 2101 2102 // Create the drag outline 2103 // We need to add extra padding to the bitmap to make room for the glow effect 2104 final Canvas canvas = new Canvas(); 2105 final int bitmapPadding = HolographicOutlineHelper.MAX_OUTER_BLUR_RADIUS; 2106 mDragOutline = createExternalDragOutline(canvas, bitmapPadding); 2107 2108 // Show the current page outlines to indicate that we can accept this drop 2109 showOutlines(); 2110 layout.setIsDragOccuring(true); 2111 layout.onDragEnter(); 2112 layout.visualizeDropLocation(null, mDragOutline, x, y, 1, 1); 2113 2114 return true; 2115 } 2116 case DragEvent.ACTION_DRAG_LOCATION: 2117 // Visualize the drop location 2118 layout.visualizeDropLocation(null, mDragOutline, x, y, 1, 1); 2119 return true; 2120 case DragEvent.ACTION_DROP: { 2121 // Try and add any shortcuts 2122 final LauncherModel model = mLauncher.getModel(); 2123 final ClipData data = event.getClipData(); 2124 2125 // We assume that the mime types are ordered in descending importance of 2126 // representation. So we enumerate the list of mime types and alert the 2127 // user if any widgets can handle the drop. Only the most preferred 2128 // representation will be handled. 2129 pos[0] = x; 2130 pos[1] = y; 2131 Pair<Integer, List<WidgetMimeTypeHandlerData>> test = validateDrag(event); 2132 if (test != null) { 2133 final int index = test.first; 2134 final List<WidgetMimeTypeHandlerData> widgets = test.second; 2135 final boolean isShortcut = (widgets == null); 2136 final String mimeType = desc.getMimeType(index); 2137 if (isShortcut) { 2138 final Intent intent = data.getItemAt(index).getIntent(); 2139 Object info = model.infoFromShortcutIntent(mContext, intent, data.getIcon()); 2140 onDropExternal(x, y, info, layout, false); 2141 } else { 2142 if (widgets.size() == 1) { 2143 // If there is only one item, then go ahead and add and configure 2144 // that widget 2145 final AppWidgetProviderInfo widgetInfo = widgets.get(0).widgetInfo; 2146 final PendingAddWidgetInfo createInfo = 2147 new PendingAddWidgetInfo(widgetInfo, mimeType, data); 2148 mLauncher.addAppWidgetFromDrop(createInfo, mCurrentPage, pos); 2149 } else { 2150 // Show the widget picker dialog if there is more than one widget 2151 // that can handle this data type 2152 final InstallWidgetReceiver.WidgetListAdapter adapter = 2153 new InstallWidgetReceiver.WidgetListAdapter(mLauncher, mimeType, 2154 data, widgets, layout, mCurrentPage, pos); 2155 final AlertDialog.Builder builder = 2156 new AlertDialog.Builder(mContext); 2157 builder.setAdapter(adapter, adapter); 2158 builder.setCancelable(true); 2159 builder.setTitle(mContext.getString( 2160 R.string.external_drop_widget_pick_title)); 2161 builder.setIcon(R.drawable.ic_no_applications); 2162 builder.show(); 2163 } 2164 } 2165 } 2166 return true; 2167 } 2168 case DragEvent.ACTION_DRAG_ENDED: 2169 // Hide the page outlines after the drop 2170 layout.setIsDragOccuring(false); 2171 layout.onDragExit(); 2172 hideOutlines(); 2173 return true; 2174 } 2175 return super.onDragEvent(event); 2176 } 2177 2178 /* 2179 * 2180 * Convert the 2D coordinate xy from the parent View's coordinate space to this CellLayout's 2181 * coordinate space. The argument xy is modified with the return result. 2182 * 2183 */ 2184 void mapPointFromSelfToChild(View v, float[] xy) { 2185 mapPointFromSelfToChild(v, xy, null); 2186 } 2187 2188 /* 2189 * 2190 * Convert the 2D coordinate xy from the parent View's coordinate space to this CellLayout's 2191 * coordinate space. The argument xy is modified with the return result. 2192 * 2193 * if cachedInverseMatrix is not null, this method will just use that matrix instead of 2194 * computing it itself; we use this to avoid redundant matrix inversions in 2195 * findMatchingPageForDragOver 2196 * 2197 */ 2198 void mapPointFromSelfToChild(View v, float[] xy, Matrix cachedInverseMatrix) { 2199 if (cachedInverseMatrix == null) { 2200 v.getMatrix().invert(mTempInverseMatrix); 2201 cachedInverseMatrix = mTempInverseMatrix; 2202 } 2203 xy[0] = xy[0] + mScrollX - v.getLeft(); 2204 xy[1] = xy[1] + mScrollY - v.getTop(); 2205 cachedInverseMatrix.mapPoints(xy); 2206 } 2207 2208 /* 2209 * 2210 * Convert the 2D coordinate xy from this CellLayout's coordinate space to 2211 * the parent View's coordinate space. The argument xy is modified with the return result. 2212 * 2213 */ 2214 void mapPointFromChildToSelf(View v, float[] xy) { 2215 v.getMatrix().mapPoints(xy); 2216 xy[0] -= (mScrollX - v.getLeft()); 2217 xy[1] -= (mScrollY - v.getTop()); 2218 } 2219 2220 static private float squaredDistance(float[] point1, float[] point2) { 2221 float distanceX = point1[0] - point2[0]; 2222 float distanceY = point2[1] - point2[1]; 2223 return distanceX * distanceX + distanceY * distanceY; 2224 } 2225 2226 /* 2227 * 2228 * Returns true if the passed CellLayout cl overlaps with dragView 2229 * 2230 */ 2231 boolean overlaps(CellLayout cl, DragView dragView, 2232 int dragViewX, int dragViewY, Matrix cachedInverseMatrix) { 2233 // Transform the coordinates of the item being dragged to the CellLayout's coordinates 2234 final float[] draggedItemTopLeft = mTempDragCoordinates; 2235 draggedItemTopLeft[0] = dragViewX + dragView.getScaledDragRegionXOffset(); 2236 draggedItemTopLeft[1] = dragViewY + dragView.getScaledDragRegionYOffset(); 2237 final float[] draggedItemBottomRight = mTempDragBottomRightCoordinates; 2238 draggedItemBottomRight[0] = draggedItemTopLeft[0] + dragView.getScaledDragRegionWidth(); 2239 draggedItemBottomRight[1] = draggedItemTopLeft[1] + dragView.getScaledDragRegionHeight(); 2240 2241 // Transform the dragged item's top left coordinates 2242 // to the CellLayout's local coordinates 2243 mapPointFromSelfToChild(cl, draggedItemTopLeft, cachedInverseMatrix); 2244 float overlapRegionLeft = Math.max(0f, draggedItemTopLeft[0]); 2245 float overlapRegionTop = Math.max(0f, draggedItemTopLeft[1]); 2246 2247 if (overlapRegionLeft <= cl.getWidth() && overlapRegionTop >= 0) { 2248 // Transform the dragged item's bottom right coordinates 2249 // to the CellLayout's local coordinates 2250 mapPointFromSelfToChild(cl, draggedItemBottomRight, cachedInverseMatrix); 2251 float overlapRegionRight = Math.min(cl.getWidth(), draggedItemBottomRight[0]); 2252 float overlapRegionBottom = Math.min(cl.getHeight(), draggedItemBottomRight[1]); 2253 2254 if (overlapRegionRight >= 0 && overlapRegionBottom <= cl.getHeight()) { 2255 float overlap = (overlapRegionRight - overlapRegionLeft) * 2256 (overlapRegionBottom - overlapRegionTop); 2257 if (overlap > 0) { 2258 return true; 2259 } 2260 } 2261 } 2262 return false; 2263 } 2264 2265 /* 2266 * 2267 * This method returns the CellLayout that is currently being dragged to. In order to drag 2268 * to a CellLayout, either the touch point must be directly over the CellLayout, or as a second 2269 * strategy, we see if the dragView is overlapping any CellLayout and choose the closest one 2270 * 2271 * Return null if no CellLayout is currently being dragged over 2272 * 2273 */ 2274 private CellLayout findMatchingPageForDragOver( 2275 DragView dragView, int originX, int originY, int offsetX, int offsetY) { 2276 // We loop through all the screens (ie CellLayouts) and see which ones overlap 2277 // with the item being dragged and then choose the one that's closest to the touch point 2278 final int screenCount = getChildCount(); 2279 CellLayout bestMatchingScreen = null; 2280 float smallestDistSoFar = Float.MAX_VALUE; 2281 2282 for (int i = 0; i < screenCount; i++) { 2283 CellLayout cl = (CellLayout)getChildAt(i); 2284 2285 final float[] touchXy = mTempTouchCoordinates; 2286 touchXy[0] = originX + offsetX; 2287 touchXy[1] = originY + offsetY; 2288 2289 // Transform the touch coordinates to the CellLayout's local coordinates 2290 // If the touch point is within the bounds of the cell layout, we can return immediately 2291 cl.getMatrix().invert(mTempInverseMatrix); 2292 mapPointFromSelfToChild(cl, touchXy, mTempInverseMatrix); 2293 2294 if (touchXy[0] >= 0 && touchXy[0] <= cl.getWidth() && 2295 touchXy[1] >= 0 && touchXy[1] <= cl.getHeight()) { 2296 return cl; 2297 } 2298 2299 if (overlaps(cl, dragView, originX, originY, mTempInverseMatrix)) { 2300 // Get the center of the cell layout in screen coordinates 2301 final float[] cellLayoutCenter = mTempCellLayoutCenterCoordinates; 2302 cellLayoutCenter[0] = cl.getWidth()/2; 2303 cellLayoutCenter[1] = cl.getHeight()/2; 2304 mapPointFromChildToSelf(cl, cellLayoutCenter); 2305 2306 touchXy[0] = originX + offsetX; 2307 touchXy[1] = originY + offsetY; 2308 2309 // Calculate the distance between the center of the CellLayout 2310 // and the touch point 2311 float dist = squaredDistance(touchXy, cellLayoutCenter); 2312 2313 if (dist < smallestDistSoFar) { 2314 smallestDistSoFar = dist; 2315 bestMatchingScreen = cl; 2316 } 2317 } 2318 } 2319 return bestMatchingScreen; 2320 } 2321 2322 public void onDragOver(DragSource source, int x, int y, int xOffset, int yOffset, 2323 DragView dragView, Object dragInfo) { 2324 // When touch is inside the scroll area, skip dragOver actions for the current screen 2325 if (!mInScrollArea) { 2326 CellLayout layout; 2327 int originX = x - xOffset; 2328 int originY = y - yOffset; 2329 boolean shrunken = mIsSmall || mIsInUnshrinkAnimation; 2330 if (shrunken) { 2331 layout = findMatchingPageForDragOver( 2332 dragView, originX, originY, xOffset, yOffset); 2333 2334 if (layout != mDragTargetLayout) { 2335 if (mDragTargetLayout != null) { 2336 mDragTargetLayout.setIsDragOverlapping(false); 2337 mSpringLoadedDragController.onDragExit(); 2338 } 2339 mDragTargetLayout = layout; 2340 if (mDragTargetLayout != null && mDragTargetLayout.getAcceptsDrops()) { 2341 mDragTargetLayout.setIsDragOverlapping(true); 2342 mSpringLoadedDragController.onDragEnter(mDragTargetLayout); 2343 } 2344 } 2345 } else { 2346 layout = getCurrentDropLayout(); 2347 if (layout != mDragTargetLayout) { 2348 if (mDragTargetLayout != null) { 2349 mDragTargetLayout.onDragExit(); 2350 } 2351 layout.onDragEnter(); 2352 mDragTargetLayout = layout; 2353 } 2354 } 2355 if (!shrunken || mShrinkState == ShrinkState.SPRING_LOADED) { 2356 layout = getCurrentDropLayout(); 2357 2358 final ItemInfo item = (ItemInfo)dragInfo; 2359 if (dragInfo instanceof LauncherAppWidgetInfo) { 2360 LauncherAppWidgetInfo widgetInfo = (LauncherAppWidgetInfo)dragInfo; 2361 2362 if (widgetInfo.spanX == -1) { 2363 // Calculate the grid spans needed to fit this widget 2364 int[] spans = layout.rectToCell( 2365 widgetInfo.minWidth, widgetInfo.minHeight, null); 2366 item.spanX = spans[0]; 2367 item.spanY = spans[1]; 2368 } 2369 } 2370 2371 if (source instanceof AllAppsPagedView) { 2372 // This is a hack to fix the point used to determine which cell an icon from 2373 // the all apps screen is over 2374 if (item != null && item.spanX == 1 && layout != null) { 2375 int dragRegionLeft = (dragView.getWidth() - layout.getCellWidth()) / 2; 2376 2377 originX += dragRegionLeft - dragView.getDragRegionLeft(); 2378 if (dragView.getDragRegionWidth() != layout.getCellWidth()) { 2379 dragView.setDragRegion(dragView.getDragRegionLeft(), 2380 dragView.getDragRegionTop(), 2381 layout.getCellWidth(), 2382 dragView.getDragRegionHeight()); 2383 } 2384 } 2385 } else if (source == this) { 2386 // When dragging from the workspace, the drag view is slightly bigger than 2387 // the original view, and offset vertically. Adjust to account for this. 2388 final View origView = mDragInfo.cell; 2389 originX += (dragView.getMeasuredWidth() - origView.getWidth()) / 2; 2390 originY += (dragView.getMeasuredHeight() - origView.getHeight()) / 2 2391 + dragView.getOffsetY(); 2392 } 2393 2394 if (mDragTargetLayout != null) { 2395 final View child = (mDragInfo == null) ? null : mDragInfo.cell; 2396 float[] localOrigin = { originX, originY }; 2397 mapPointFromSelfToChild(mDragTargetLayout, localOrigin, null); 2398 mDragTargetLayout.visualizeDropLocation(child, mDragOutline, 2399 (int) localOrigin[0], (int) localOrigin[1], item.spanX, item.spanY); 2400 } 2401 } 2402 } 2403 } 2404 2405 private void doDragExit() { 2406 mWasSpringLoadedOnDragExit = mShrinkState == ShrinkState.SPRING_LOADED; 2407 if (mDragTargetLayout != null) { 2408 mDragTargetLayout.onDragExit(); 2409 } 2410 if (!mIsPageMoving) { 2411 hideOutlines(); 2412 } 2413 if (mShrinkState == ShrinkState.SPRING_LOADED) { 2414 mLauncher.exitSpringLoadedDragMode(); 2415 } 2416 clearAllHovers(); 2417 } 2418 2419 public void onDragExit(DragSource source, int x, int y, int xOffset, 2420 int yOffset, DragView dragView, Object dragInfo) { 2421 doDragExit(); 2422 } 2423 2424 @Override 2425 public void getHitRect(Rect outRect) { 2426 // We want the workspace to have the whole area of the display (it will find the correct 2427 // cell layout to drop to in the existing drag/drop logic. 2428 final Display d = mLauncher.getWindowManager().getDefaultDisplay(); 2429 outRect.set(0, 0, d.getWidth(), d.getHeight()); 2430 } 2431 2432 /** 2433 * Add the item specified by dragInfo to the given layout. 2434 * @return true if successful 2435 */ 2436 public boolean addExternalItemToScreen(ItemInfo dragInfo, CellLayout layout) { 2437 if (layout.findCellForSpan(mTempEstimate, dragInfo.spanX, dragInfo.spanY)) { 2438 onDropExternal(-1, -1, (ItemInfo) dragInfo, (CellLayout) layout, false); 2439 return true; 2440 } 2441 mLauncher.showOutOfSpaceMessage(); 2442 return false; 2443 } 2444 2445 /** 2446 * Drop an item that didn't originate on one of the workspace screens. 2447 * It may have come from Launcher (e.g. from all apps or customize), or it may have 2448 * come from another app altogether. 2449 * 2450 * NOTE: This can also be called when we are outside of a drag event, when we want 2451 * to add an item to one of the workspace screens. 2452 */ 2453 private void onDropExternal(int x, int y, Object dragInfo, 2454 CellLayout cellLayout, boolean insertAtFirst) { 2455 int screen = indexOfChild(cellLayout); 2456 if (dragInfo instanceof PendingAddItemInfo) { 2457 PendingAddItemInfo info = (PendingAddItemInfo) dragInfo; 2458 // When dragging and dropping from customization tray, we deal with creating 2459 // widgets/shortcuts/folders in a slightly different way 2460 // Only set touchXY if you are supporting spring loaded adding of items 2461 int[] touchXY = new int[2]; 2462 touchXY[0] = x; 2463 touchXY[1] = y; 2464 switch (info.itemType) { 2465 case LauncherSettings.Favorites.ITEM_TYPE_APPWIDGET: 2466 mLauncher.addAppWidgetFromDrop((PendingAddWidgetInfo) info, screen, touchXY); 2467 break; 2468 case LauncherSettings.Favorites.ITEM_TYPE_LIVE_FOLDER: 2469 mLauncher.addLiveFolderFromDrop(info.componentName, screen, touchXY); 2470 break; 2471 case LauncherSettings.Favorites.ITEM_TYPE_SHORTCUT: 2472 mLauncher.processShortcutFromDrop(info.componentName, screen, touchXY); 2473 break; 2474 default: 2475 throw new IllegalStateException("Unknown item type: " + info.itemType); 2476 } 2477 cellLayout.onDragExit(); 2478 } else { 2479 // This is for other drag/drop cases, like dragging from All Apps 2480 ItemInfo info = (ItemInfo) dragInfo; 2481 View view = null; 2482 2483 switch (info.itemType) { 2484 case LauncherSettings.Favorites.ITEM_TYPE_APPLICATION: 2485 case LauncherSettings.Favorites.ITEM_TYPE_SHORTCUT: 2486 if (info.container == NO_ID && info instanceof ApplicationInfo) { 2487 // Came from all apps -- make a copy 2488 info = new ShortcutInfo((ApplicationInfo) info); 2489 } 2490 view = mLauncher.createShortcut(R.layout.application, cellLayout, 2491 (ShortcutInfo) info); 2492 break; 2493 case LauncherSettings.Favorites.ITEM_TYPE_USER_FOLDER: 2494 view = FolderIcon.fromXml(R.layout.folder_icon, mLauncher, 2495 cellLayout, (UserFolderInfo) info, mIconCache); 2496 break; 2497 default: 2498 throw new IllegalStateException("Unknown item type: " + info.itemType); 2499 } 2500 2501 mTargetCell = new int[2]; 2502 if (x != -1 && y != -1) { 2503 // when dragging and dropping, just find the closest free spot 2504 cellLayout.findNearestVacantArea(x, y, 1, 1, mTargetCell); 2505 } else { 2506 cellLayout.findCellForSpan(mTargetCell, 1, 1); 2507 } 2508 addInScreen(view, indexOfChild(cellLayout), mTargetCell[0], 2509 mTargetCell[1], info.spanX, info.spanY, insertAtFirst); 2510 boolean animateDrop = !mWasSpringLoadedOnDragExit; 2511 cellLayout.onDropChild(view, animateDrop); 2512 cellLayout.animateDrop(); 2513 CellLayout.LayoutParams lp = (CellLayout.LayoutParams) view.getLayoutParams(); 2514 2515 LauncherModel.addOrMoveItemInDatabase(mLauncher, info, 2516 LauncherSettings.Favorites.CONTAINER_DESKTOP, screen, 2517 lp.cellX, lp.cellY); 2518 } 2519 } 2520 2521 /** 2522 * Return the current {@link CellLayout}, correctly picking the destination 2523 * screen while a scroll is in progress. 2524 */ 2525 private CellLayout getCurrentDropLayout() { 2526 // if we're currently small, use findMatchingPageForDragOver instead 2527 if (mIsSmall) return null; 2528 int index = mScroller.isFinished() ? mCurrentPage : mNextPage; 2529 return (CellLayout) getChildAt(index); 2530 } 2531 2532 /** 2533 * Return the current CellInfo describing our current drag; this method exists 2534 * so that Launcher can sync this object with the correct info when the activity is created/ 2535 * destroyed 2536 * 2537 */ 2538 public CellLayout.CellInfo getDragInfo() { 2539 return mDragInfo; 2540 } 2541 2542 /** 2543 * Calculate the nearest cell where the given object would be dropped. 2544 */ 2545 private int[] findNearestVacantArea(int pixelX, int pixelY, 2546 int spanX, int spanY, View ignoreView, CellLayout layout, int[] recycle) { 2547 2548 int localPixelX = pixelX - (layout.getLeft() - mScrollX); 2549 int localPixelY = pixelY - (layout.getTop() - mScrollY); 2550 2551 // Find the best target drop location 2552 return layout.findNearestVacantArea( 2553 localPixelX, localPixelY, spanX, spanY, ignoreView, recycle); 2554 } 2555 2556 void setLauncher(Launcher launcher) { 2557 mLauncher = launcher; 2558 mSpringLoadedDragController = new SpringLoadedDragController(mLauncher); 2559 2560 mCustomizationDrawer = mLauncher.findViewById(R.id.customization_drawer); 2561 if (mCustomizationDrawer != null) { 2562 mCustomizationDrawerContent = 2563 mCustomizationDrawer.findViewById(com.android.internal.R.id.tabcontent); 2564 } 2565 } 2566 2567 public void setDragController(DragController dragController) { 2568 mDragController = dragController; 2569 } 2570 2571 /** 2572 * Called at the end of a drag which originated on the workspace. 2573 */ 2574 public void onDropCompleted(View target, boolean success) { 2575 if (success) { 2576 if (target != this && mDragInfo != null) { 2577 final CellLayout cellLayout = (CellLayout) getChildAt(mDragInfo.screen); 2578 cellLayout.removeView(mDragInfo.cell); 2579 if (mDragInfo.cell instanceof DropTarget) { 2580 mDragController.removeDropTarget((DropTarget)mDragInfo.cell); 2581 } 2582 // final Object tag = mDragInfo.cell.getTag(); 2583 } 2584 } else if (mDragInfo != null) { 2585 // NOTE: When 'success' is true, onDragExit is called by the DragController before 2586 // calling onDropCompleted(). We call it ourselves here, but maybe this should be 2587 // moved into DragController.cancelDrag(). 2588 doDragExit(); 2589 ((CellLayout) getChildAt(mDragInfo.screen)).onDropChild(mDragInfo.cell, false); 2590 } 2591 mLauncher.unlockScreenOrientation(); 2592 mDragOutline = null; 2593 mDragInfo = null; 2594 } 2595 2596 @Override 2597 public void onDragViewVisible() { 2598 ((View) mDragInfo.cell).setVisibility(View.GONE); 2599 } 2600 2601 public boolean isDropEnabled() { 2602 return true; 2603 } 2604 2605 @Override 2606 protected void onRestoreInstanceState(Parcelable state) { 2607 super.onRestoreInstanceState(state); 2608 Launcher.setScreen(mCurrentPage); 2609 } 2610 2611 @Override 2612 public void scrollLeft() { 2613 if (!mIsSmall && !mIsInUnshrinkAnimation) { 2614 super.scrollLeft(); 2615 } 2616 } 2617 2618 @Override 2619 public void scrollRight() { 2620 if (!mIsSmall && !mIsInUnshrinkAnimation) { 2621 super.scrollRight(); 2622 } 2623 } 2624 2625 @Override 2626 public void onEnterScrollArea(int direction) { 2627 if (!mIsSmall && !mIsInUnshrinkAnimation) { 2628 mInScrollArea = true; 2629 mPendingScrollDirection = direction; 2630 2631 final int page = mCurrentPage + (direction == DragController.SCROLL_LEFT ? -1 : 1); 2632 final CellLayout layout = (CellLayout) getChildAt(page); 2633 2634 if (layout != null) { 2635 layout.setIsDragOverlapping(true); 2636 2637 if (mDragTargetLayout != null) { 2638 mDragTargetLayout.onDragExit(); 2639 mDragTargetLayout = null; 2640 } 2641 } 2642 } 2643 } 2644 2645 private void clearAllHovers() { 2646 final int childCount = getChildCount(); 2647 for (int i = 0; i < childCount; i++) { 2648 ((CellLayout) getChildAt(i)).setIsDragOverlapping(false); 2649 } 2650 mSpringLoadedDragController.onDragExit(); 2651 } 2652 2653 @Override 2654 public void onExitScrollArea() { 2655 if (mInScrollArea) { 2656 mInScrollArea = false; 2657 mPendingScrollDirection = DragController.SCROLL_NONE; 2658 clearAllHovers(); 2659 } 2660 } 2661 2662 public Folder getFolderForTag(Object tag) { 2663 final int screenCount = getChildCount(); 2664 for (int screen = 0; screen < screenCount; screen++) { 2665 CellLayout currentScreen = ((CellLayout) getChildAt(screen)); 2666 int count = currentScreen.getChildCount(); 2667 for (int i = 0; i < count; i++) { 2668 View child = currentScreen.getChildAt(i); 2669 CellLayout.LayoutParams lp = (CellLayout.LayoutParams) child.getLayoutParams(); 2670 if (lp.cellHSpan == 4 && lp.cellVSpan == 4 && child instanceof Folder) { 2671 Folder f = (Folder) child; 2672 if (f.getInfo() == tag && f.getInfo().opened) { 2673 return f; 2674 } 2675 } 2676 } 2677 } 2678 return null; 2679 } 2680 2681 public View getViewForTag(Object tag) { 2682 int screenCount = getChildCount(); 2683 for (int screen = 0; screen < screenCount; screen++) { 2684 CellLayout currentScreen = ((CellLayout) getChildAt(screen)); 2685 int count = currentScreen.getChildCount(); 2686 for (int i = 0; i < count; i++) { 2687 View child = currentScreen.getChildAt(i); 2688 if (child.getTag() == tag) { 2689 return child; 2690 } 2691 } 2692 } 2693 return null; 2694 } 2695 2696 2697 void removeItems(final ArrayList<ApplicationInfo> apps) { 2698 final int screenCount = getChildCount(); 2699 final PackageManager manager = getContext().getPackageManager(); 2700 final AppWidgetManager widgets = AppWidgetManager.getInstance(getContext()); 2701 2702 final HashSet<String> packageNames = new HashSet<String>(); 2703 final int appCount = apps.size(); 2704 for (int i = 0; i < appCount; i++) { 2705 packageNames.add(apps.get(i).componentName.getPackageName()); 2706 } 2707 2708 for (int i = 0; i < screenCount; i++) { 2709 final CellLayout layout = (CellLayout) getChildAt(i); 2710 2711 // Avoid ANRs by treating each screen separately 2712 post(new Runnable() { 2713 public void run() { 2714 final ArrayList<View> childrenToRemove = new ArrayList<View>(); 2715 childrenToRemove.clear(); 2716 2717 int childCount = layout.getChildCount(); 2718 for (int j = 0; j < childCount; j++) { 2719 final View view = layout.getChildAt(j); 2720 Object tag = view.getTag(); 2721 2722 if (tag instanceof ShortcutInfo) { 2723 final ShortcutInfo info = (ShortcutInfo) tag; 2724 final Intent intent = info.intent; 2725 final ComponentName name = intent.getComponent(); 2726 2727 if (Intent.ACTION_MAIN.equals(intent.getAction()) && name != null) { 2728 for (String packageName: packageNames) { 2729 if (packageName.equals(name.getPackageName())) { 2730 LauncherModel.deleteItemFromDatabase(mLauncher, info); 2731 childrenToRemove.add(view); 2732 } 2733 } 2734 } 2735 } else if (tag instanceof UserFolderInfo) { 2736 final UserFolderInfo info = (UserFolderInfo) tag; 2737 final ArrayList<ShortcutInfo> contents = info.contents; 2738 final ArrayList<ShortcutInfo> toRemove = new ArrayList<ShortcutInfo>(1); 2739 final int contentsCount = contents.size(); 2740 boolean removedFromFolder = false; 2741 2742 for (int k = 0; k < contentsCount; k++) { 2743 final ShortcutInfo appInfo = contents.get(k); 2744 final Intent intent = appInfo.intent; 2745 final ComponentName name = intent.getComponent(); 2746 2747 if (Intent.ACTION_MAIN.equals(intent.getAction()) && name != null) { 2748 for (String packageName: packageNames) { 2749 if (packageName.equals(name.getPackageName())) { 2750 toRemove.add(appInfo); 2751 LauncherModel.deleteItemFromDatabase(mLauncher, appInfo); 2752 removedFromFolder = true; 2753 } 2754 } 2755 } 2756 } 2757 2758 contents.removeAll(toRemove); 2759 if (removedFromFolder) { 2760 final Folder folder = getOpenFolder(); 2761 if (folder != null) 2762 folder.notifyDataSetChanged(); 2763 } 2764 } else if (tag instanceof LiveFolderInfo) { 2765 final LiveFolderInfo info = (LiveFolderInfo) tag; 2766 final Uri uri = info.uri; 2767 final ProviderInfo providerInfo = manager.resolveContentProvider( 2768 uri.getAuthority(), 0); 2769 2770 if (providerInfo != null) { 2771 for (String packageName: packageNames) { 2772 if (packageName.equals(providerInfo.packageName)) { 2773 LauncherModel.deleteItemFromDatabase(mLauncher, info); 2774 childrenToRemove.add(view); 2775 } 2776 } 2777 } 2778 } else if (tag instanceof LauncherAppWidgetInfo) { 2779 final LauncherAppWidgetInfo info = (LauncherAppWidgetInfo) tag; 2780 final AppWidgetProviderInfo provider = 2781 widgets.getAppWidgetInfo(info.appWidgetId); 2782 if (provider != null) { 2783 for (String packageName: packageNames) { 2784 if (packageName.equals(provider.provider.getPackageName())) { 2785 LauncherModel.deleteItemFromDatabase(mLauncher, info); 2786 childrenToRemove.add(view); 2787 } 2788 } 2789 } 2790 } 2791 } 2792 2793 childCount = childrenToRemove.size(); 2794 for (int j = 0; j < childCount; j++) { 2795 View child = childrenToRemove.get(j); 2796 layout.removeViewInLayout(child); 2797 if (child instanceof DropTarget) { 2798 mDragController.removeDropTarget((DropTarget)child); 2799 } 2800 } 2801 2802 if (childCount > 0) { 2803 layout.requestLayout(); 2804 layout.invalidate(); 2805 } 2806 } 2807 }); 2808 } 2809 } 2810 2811 void updateShortcuts(ArrayList<ApplicationInfo> apps) { 2812 final int screenCount = getChildCount(); 2813 for (int i = 0; i < screenCount; i++) { 2814 final CellLayout layout = (CellLayout) getChildAt(i); 2815 int childCount = layout.getChildCount(); 2816 for (int j = 0; j < childCount; j++) { 2817 final View view = layout.getChildAt(j); 2818 Object tag = view.getTag(); 2819 if (tag instanceof ShortcutInfo) { 2820 ShortcutInfo info = (ShortcutInfo)tag; 2821 // We need to check for ACTION_MAIN otherwise getComponent() might 2822 // return null for some shortcuts (for instance, for shortcuts to 2823 // web pages.) 2824 final Intent intent = info.intent; 2825 final ComponentName name = intent.getComponent(); 2826 if (info.itemType == LauncherSettings.Favorites.ITEM_TYPE_APPLICATION && 2827 Intent.ACTION_MAIN.equals(intent.getAction()) && name != null) { 2828 final int appCount = apps.size(); 2829 for (int k = 0; k < appCount; k++) { 2830 ApplicationInfo app = apps.get(k); 2831 if (app.componentName.equals(name)) { 2832 info.setIcon(mIconCache.getIcon(info.intent)); 2833 ((TextView)view).setCompoundDrawablesWithIntrinsicBounds(null, 2834 new FastBitmapDrawable(info.getIcon(mIconCache)), 2835 null, null); 2836 } 2837 } 2838 } 2839 } 2840 } 2841 } 2842 } 2843 2844 void moveToDefaultScreen(boolean animate) { 2845 if (mIsSmall || mIsInUnshrinkAnimation) { 2846 mLauncher.showWorkspace(animate, (CellLayout)getChildAt(mDefaultPage)); 2847 } else if (animate) { 2848 snapToPage(mDefaultPage); 2849 } else { 2850 setCurrentPage(mDefaultPage); 2851 } 2852 getChildAt(mDefaultPage).requestFocus(); 2853 } 2854 2855 void setIndicators(Drawable previous, Drawable next) { 2856 mPreviousIndicator = previous; 2857 mNextIndicator = next; 2858 previous.setLevel(mCurrentPage); 2859 next.setLevel(mCurrentPage); 2860 } 2861 2862 @Override 2863 public void syncPages() { 2864 } 2865 2866 @Override 2867 public void syncPageItems(int page) { 2868 } 2869 2870} 2871