Workspace.java revision 0e26059548e429e5d1c973bebe4c561bead2926f
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; 20 21import android.app.WallpaperManager; 22import android.appwidget.AppWidgetManager; 23import android.appwidget.AppWidgetProviderInfo; 24import android.content.ComponentName; 25import android.content.Context; 26import android.content.Intent; 27import android.content.pm.PackageManager; 28import android.content.pm.ProviderInfo; 29import android.content.res.TypedArray; 30import android.graphics.Canvas; 31import android.graphics.Rect; 32import android.graphics.drawable.Drawable; 33import android.net.Uri; 34import android.os.IBinder; 35import android.os.Parcel; 36import android.os.Parcelable; 37import android.util.AttributeSet; 38import android.util.Log; 39import android.view.MotionEvent; 40import android.view.VelocityTracker; 41import android.view.View; 42import android.view.ViewConfiguration; 43import android.view.ViewGroup; 44import android.view.ViewParent; 45import android.view.animation.Animation; 46import android.view.animation.Interpolator; 47import android.view.animation.RotateAnimation; 48import android.view.animation.Animation.AnimationListener; 49import android.widget.Scroller; 50import android.widget.TextView; 51import android.widget.Toast; 52 53import java.util.ArrayList; 54import java.util.HashSet; 55 56/** 57 * The workspace is a wide area with a wallpaper and a finite number of screens. 58 * Each screen contains a number of icons, folders or widgets the user can 59 * interact with. A workspace is meant to be used with a fixed width only. 60 */ 61public class Workspace extends ViewGroup implements DropTarget, DragSource, DragScroller { 62 @SuppressWarnings({"UnusedDeclaration"}) 63 private static final String TAG = "Launcher.Workspace"; 64 private static final int INVALID_SCREEN = -1; 65 66 /** 67 * The velocity at which a fling gesture will cause us to snap to the next 68 * screen 69 */ 70 private static final int SNAP_VELOCITY = 600; 71 72 private final WallpaperManager mWallpaperManager; 73 74 private int mDefaultScreen; 75 76 private boolean mFirstLayout = true; 77 78 private int mCurrentScreen; 79 private int mNextScreen = INVALID_SCREEN; 80 private Scroller mScroller; 81 private VelocityTracker mVelocityTracker; 82 83 /** 84 * CellInfo for the cell that is currently being dragged 85 */ 86 private CellLayout.CellInfo mDragInfo; 87 88 /** 89 * Target drop area calculated during last acceptDrop call. 90 */ 91 private int[] mTargetCell = null; 92 93 private float mLastMotionX; 94 private float mLastMotionY; 95 96 private final static int TOUCH_STATE_REST = 0; 97 private final static int TOUCH_STATE_SCROLLING = 1; 98 99 private int mTouchState = TOUCH_STATE_REST; 100 101 private OnTouchListener mInterceptTouchListener; 102 private OnLongClickListener mLongClickListener; 103 104 private Launcher mLauncher; 105 private IconCache mIconCache; 106 private DragController mDragController; 107 108 /** 109 * Cache of vacant cells, used during drag events and invalidated as needed. 110 */ 111 private CellLayout.CellInfo mVacantCache = null; 112 113 private int[] mTempCell = new int[2]; 114 private int[] mTempEstimate = new int[2]; 115 116 private boolean mAllowLongPress = true; 117 118 private int mTouchSlop; 119 private int mMaximumVelocity; 120 121 private static final int INVALID_POINTER = -1; 122 123 private int mActivePointerId = INVALID_POINTER; 124 125 private Drawable mPreviousIndicator; 126 private Drawable mNextIndicator; 127 128 private static final float NANOTIME_DIV = 1000000000.0f; 129 private static final float SMOOTHING_SPEED = 0.75f; 130 private static final float SMOOTHING_CONSTANT = (float) (0.016 / Math.log(SMOOTHING_SPEED)); 131 private float mSmoothingTime; 132 private float mTouchX; 133 134 private WorkspaceOvershootInterpolator mScrollInterpolator; 135 136 private static final float BASELINE_FLING_VELOCITY = 2500.f; 137 private static final float FLING_VELOCITY_INFLUENCE = 0.4f; 138 139 private static class WorkspaceOvershootInterpolator implements Interpolator { 140 private static final float DEFAULT_TENSION = 1.3f; 141 private float mTension; 142 143 public WorkspaceOvershootInterpolator() { 144 mTension = DEFAULT_TENSION; 145 } 146 147 public void setDistance(int distance) { 148 mTension = distance > 0 ? DEFAULT_TENSION / distance : DEFAULT_TENSION; 149 } 150 151 public void disableSettle() { 152 mTension = 0.f; 153 } 154 155 public float getInterpolation(float t) { 156 // _o(t) = t * t * ((tension + 1) * t + tension) 157 // o(t) = _o(t - 1) + 1 158 t -= 1.0f; 159 return t * t * ((mTension + 1) * t + mTension) + 1.0f; 160 } 161 } 162 163 /** 164 * Used to inflate the Workspace from XML. 165 * 166 * @param context The application's context. 167 * @param attrs The attribtues set containing the Workspace's customization values. 168 */ 169 public Workspace(Context context, AttributeSet attrs) { 170 this(context, attrs, 0); 171 } 172 173 /** 174 * Used to inflate the Workspace from XML. 175 * 176 * @param context The application's context. 177 * @param attrs The attribtues set containing the Workspace's customization values. 178 * @param defStyle Unused. 179 */ 180 public Workspace(Context context, AttributeSet attrs, int defStyle) { 181 super(context, attrs, defStyle); 182 183 mWallpaperManager = WallpaperManager.getInstance(context); 184 185 TypedArray a = context.obtainStyledAttributes(attrs, 186 R.styleable.Workspace, defStyle, 0); 187 int canonicalDeviceWidth = a.getInt(R.styleable.Workspace_canonicalDeviceWidth, 4); 188 int canonicalDeviceHeight = a.getInt(R.styleable.Workspace_canonicalDeviceHeight, 4); 189 mDefaultScreen = a.getInt(R.styleable.Workspace_defaultScreen, 1); 190 a.recycle(); 191 192 LauncherModel.updateWorkspaceLayoutCells(canonicalDeviceWidth, 193 canonicalDeviceHeight); 194 setHapticFeedbackEnabled(false); 195 initWorkspace(); 196 } 197 198 /** 199 * Initializes various states for this workspace. 200 */ 201 private void initWorkspace() { 202 Context context = getContext(); 203 mScrollInterpolator = new WorkspaceOvershootInterpolator(); 204 mScroller = new Scroller(context, mScrollInterpolator); 205 mCurrentScreen = mDefaultScreen; 206 Launcher.setScreen(mCurrentScreen); 207 LauncherApplication app = (LauncherApplication)context.getApplicationContext(); 208 mIconCache = app.getIconCache(); 209 210 final ViewConfiguration configuration = ViewConfiguration.get(getContext()); 211 mTouchSlop = configuration.getScaledTouchSlop(); 212 mMaximumVelocity = configuration.getScaledMaximumFlingVelocity(); 213 } 214 215 @Override 216 public void addView(View child, int index, LayoutParams params) { 217 if (!(child instanceof CellLayout)) { 218 throw new IllegalArgumentException("A Workspace can only have CellLayout children."); 219 } 220 super.addView(child, index, params); 221 } 222 223 @Override 224 public void addView(View child) { 225 if (!(child instanceof CellLayout)) { 226 throw new IllegalArgumentException("A Workspace can only have CellLayout children."); 227 } 228 super.addView(child); 229 } 230 231 @Override 232 public void addView(View child, int index) { 233 if (!(child instanceof CellLayout)) { 234 throw new IllegalArgumentException("A Workspace can only have CellLayout children."); 235 } 236 super.addView(child, index); 237 } 238 239 @Override 240 public void addView(View child, int width, int height) { 241 if (!(child instanceof CellLayout)) { 242 throw new IllegalArgumentException("A Workspace can only have CellLayout children."); 243 } 244 super.addView(child, width, height); 245 } 246 247 @Override 248 public void addView(View child, LayoutParams params) { 249 if (!(child instanceof CellLayout)) { 250 throw new IllegalArgumentException("A Workspace can only have CellLayout children."); 251 } 252 super.addView(child, params); 253 } 254 255 /** 256 * @return The open folder on the current screen, or null if there is none 257 */ 258 Folder getOpenFolder() { 259 CellLayout currentScreen = (CellLayout) getChildAt(mCurrentScreen); 260 int count = currentScreen.getChildCount(); 261 for (int i = 0; i < count; i++) { 262 View child = currentScreen.getChildAt(i); 263 if (child instanceof Folder) { 264 Folder folder = (Folder) child; 265 if (folder.getInfo().opened) 266 return folder; 267 } 268 } 269 return null; 270 } 271 272 ArrayList<Folder> getOpenFolders() { 273 final int screens = getChildCount(); 274 ArrayList<Folder> folders = new ArrayList<Folder>(screens); 275 276 for (int screen = 0; screen < screens; screen++) { 277 CellLayout currentScreen = (CellLayout) getChildAt(screen); 278 int count = currentScreen.getChildCount(); 279 for (int i = 0; i < count; i++) { 280 View child = currentScreen.getChildAt(i); 281 CellLayout.LayoutParams lp = (CellLayout.LayoutParams) child 282 .getLayoutParams(); 283 if (child instanceof Folder) { 284 Folder folder = (Folder) child; 285 if (folder.getInfo().opened) 286 folders.add(folder); 287 break; 288 } 289 } 290 } 291 292 return folders; 293 } 294 295 boolean isDefaultScreenShowing() { 296 return mCurrentScreen == mDefaultScreen; 297 } 298 299 /** 300 * Returns the index of the currently displayed screen. 301 * 302 * @return The index of the currently displayed screen. 303 */ 304 int getCurrentScreen() { 305 return mCurrentScreen; 306 } 307 308 /** 309 * Sets the current screen. 310 * 311 * @param currentScreen 312 */ 313 void setCurrentScreen(int currentScreen) { 314 if (!mScroller.isFinished()) 315 mScroller.abortAnimation(); 316 clearVacantCache(); 317 mCurrentScreen = Math.max(0, Math.min(currentScreen, getChildCount() - 1)); 318 if (mPreviousIndicator != null) { 319 mPreviousIndicator.setLevel(mCurrentScreen); 320 mNextIndicator.setLevel(mCurrentScreen); 321 } 322 323 scrollTo(mCurrentScreen * getWidth(), 0); 324 updateWallpaperOffset(); 325 invalidate(); 326 } 327 328 /** 329 * Adds the specified child in the current screen. The position and dimension of 330 * the child are defined by x, y, spanX and spanY. 331 * 332 * @param child The child to add in one of the workspace's screens. 333 * @param x The X position of the child in the screen's grid. 334 * @param y The Y position of the child in the screen's grid. 335 * @param spanX The number of cells spanned horizontally by the child. 336 * @param spanY The number of cells spanned vertically by the child. 337 */ 338 void addInCurrentScreen(View child, int x, int y, int spanX, int spanY) { 339 addInScreen(child, mCurrentScreen, x, y, spanX, spanY, false); 340 } 341 342 /** 343 * Adds the specified child in the current screen. The position and dimension of 344 * the child are defined by x, y, spanX and spanY. 345 * 346 * @param child The child to add in one of the workspace's screens. 347 * @param x The X position of the child in the screen's grid. 348 * @param y The Y position of the child in the screen's grid. 349 * @param spanX The number of cells spanned horizontally by the child. 350 * @param spanY The number of cells spanned vertically by the child. 351 * @param insert When true, the child is inserted at the beginning of the children list. 352 */ 353 void addInCurrentScreen(View child, int x, int y, int spanX, int spanY, boolean insert) { 354 addInScreen(child, mCurrentScreen, x, y, spanX, spanY, insert); 355 } 356 357 /** 358 * Adds the specified child in the specified screen. The position and dimension of 359 * the child are defined by x, y, spanX and spanY. 360 * 361 * @param child The child to add in one of the workspace's screens. 362 * @param screen The screen in which to add the child. 363 * @param x The X position of the child in the screen's grid. 364 * @param y The Y position of the child in the screen's grid. 365 * @param spanX The number of cells spanned horizontally by the child. 366 * @param spanY The number of cells spanned vertically by the child. 367 */ 368 void addInScreen(View child, int screen, int x, int y, int spanX, int spanY) { 369 addInScreen(child, screen, x, y, spanX, spanY, false); 370 } 371 372 void addInFullScreen(View child, int screen) { 373 addInScreen(child, screen, 0, 0, -1, -1); 374 } 375 376 public void rotateCurrentScreensChildren() { 377 378 // close all the folders first 379 final ArrayList<Folder> openFolders = getOpenFolders(); 380 381 WorkspaceOvershootInterpolator wi = new WorkspaceOvershootInterpolator(); 382 RotateAnimation ra = new RotateAnimation((float) LauncherModel 383 .getPreviousOrientationRelativeToCurrent(), 0, 384 Animation.RELATIVE_TO_SELF, 0.5f, Animation.RELATIVE_TO_SELF, 385 0.5f); 386 ra.setInterpolator(wi); 387 CellLayout currentScreen = (CellLayout) getChildAt(mCurrentScreen); 388 ra.setStartOffset(150); 389 ra.setDuration(650 + (int) (Math.random() * 400) - 200); 390 391 CellLayout.CellLayoutAnimationController animationController = new CellLayout.CellLayoutAnimationController( 392 ra, 0.0f); 393 currentScreen.setLayoutAnimation(animationController); 394 currentScreen.setLayoutAnimationListener(new AnimationListener() { 395 public void onAnimationStart(Animation animation) { 396 // do nothing 397 } 398 399 public void onAnimationRepeat(Animation animation) { 400 // do nothing 401 } 402 403 public void onAnimationEnd(Animation animation) { 404 for (int j = 0; j < openFolders.size(); ++j) { 405 Folder folder = openFolders.get(j); 406 if (!folder.getInfo().opened) { 407 mLauncher.openFolder(folder.getInfo()); 408 } 409 } 410 } 411 }); 412 animationController.start(); 413 414 for (int j = 0; j < openFolders.size(); ++j) { 415 mLauncher.closeFolder(openFolders.get(j)); 416 } 417 } 418 419 public void refreshWorkspaceChildren() { 420 final int count = getChildCount(); 421 View child; 422 423 CellLayout.LayoutParams lp; 424 int widthMeasureSpec = MeasureSpec.makeMeasureSpec(LauncherModel 425 .getLocalDeviceWidth(), MeasureSpec.EXACTLY); 426 int heightMeasureSpec = MeasureSpec.makeMeasureSpec(LauncherModel 427 .getLocalDeviceHeight(), MeasureSpec.EXACTLY); 428 429 clearVacantCache(); 430 431 for (int i = 0; i < count; i++) { 432 final CellLayout layout = (CellLayout) getChildAt(i); 433 int numChildren = layout.getChildCount(); 434 435 // save reference to all current children 436 for (int j = 0; j < numChildren; j++) { 437 child = layout.getChildAt(j); 438 439 lp = (CellLayout.LayoutParams) child.getLayoutParams(); 440 LauncherModelOrientationHelper.Coordinates localCoord = LauncherModel 441 .getLocalCoordinatesFromPreviousLocalCoordinates(lp); 442 443 lp.cellX = localCoord.x; 444 lp.cellY = localCoord.y; 445 } 446 447 layout.measure(widthMeasureSpec, heightMeasureSpec); 448 } 449 } 450 451 /** 452 * Adds the specified child in the specified screen. The position and dimension of 453 * the child are defined by x, y, spanX and spanY. 454 * 455 * @param child The child to add in one of the workspace's screens. 456 * @param screen The screen in which to add the child. 457 * @param x The X position of the child in the screen's grid. 458 * @param y The Y position of the child in the screen's grid. 459 * @param spanX The number of cells spanned horizontally by the child. 460 * @param spanY The number of cells spanned vertically by the child. 461 * @param insert When true, the child is inserted at the beginning of the children list. 462 */ 463 void addInScreen(View child, int screen, int x, int y, int spanX, int spanY, boolean insert) { 464 if (screen < 0 || screen >= getChildCount()) { 465 Log.e(TAG, "The screen must be >= 0 and < " + getChildCount() 466 + " (was " + screen + "); skipping child"); 467 return; 468 } 469 470 clearVacantCache(); 471 472 final CellLayout group = (CellLayout) getChildAt(screen); 473 CellLayout.LayoutParams lp = (CellLayout.LayoutParams) child.getLayoutParams(); 474 if (lp == null) { 475 lp = new CellLayout.LayoutParams(x, y, spanX, spanY); 476 } else { 477 lp.cellX = x; 478 lp.cellY = y; 479 lp.cellHSpan = spanX; 480 lp.cellVSpan = spanY; 481 } 482 483 // get the canonical child id to uniquely represent this view in this 484 // screen 485 int childId = LauncherModel.getCanonicalCellLayoutChildId(child.getId(), screen, x, y, spanX, spanY); 486 if (!group.addViewToCellLayout(child, insert ? 0 : -1, childId, lp)) { 487 // TODO: This branch occurs when the workspace is adding views 488 // outside of the defined grid 489 // maybe we should be deleting these items from the LauncherMode? 490 Log.w(TAG, "Failed to add to item at (" + lp.cellX + "," + lp.cellY + ") to CellLayout"); 491 } 492 493 if (!(child instanceof Folder)) { 494 child.setHapticFeedbackEnabled(false); 495 child.setOnLongClickListener(mLongClickListener); 496 } 497 if (child instanceof DropTarget) { 498 mDragController.addDropTarget((DropTarget) child); 499 } 500 } 501 502 CellLayout.CellInfo findAllVacantCells(boolean[] occupied) { 503 CellLayout group = (CellLayout) getChildAt(mCurrentScreen); 504 if (group != null) { 505 return group.findAllVacantCells(occupied, null); 506 } 507 return null; 508 } 509 510 private void clearVacantCache() { 511 if (mVacantCache != null) { 512 mVacantCache.clearVacantCells(); 513 mVacantCache = null; 514 } 515 } 516 517 public void setOnInterceptTouchListener(View.OnTouchListener listener) { 518 mInterceptTouchListener = listener; 519 } 520 521 /** 522 * Registers the specified listener on each screen contained in this workspace. 523 * 524 * @param l The listener used to respond to long clicks. 525 */ 526 @Override 527 public void setOnLongClickListener(OnLongClickListener l) { 528 mLongClickListener = l; 529 final int count = getChildCount(); 530 for (int i = 0; i < count; i++) { 531 getChildAt(i).setOnLongClickListener(l); 532 } 533 } 534 535 private void updateWallpaperOffset() { 536 updateWallpaperOffset(getChildAt(getChildCount() - 1).getRight() - (mRight - mLeft)); 537 } 538 539 private void updateWallpaperOffset(int scrollRange) { 540 IBinder token = getWindowToken(); 541 if (token != null) { 542 mWallpaperManager.setWallpaperOffsetSteps(1.0f / (getChildCount() - 1), 0 ); 543 mWallpaperManager.setWallpaperOffsets(getWindowToken(), 544 Math.max(0.f, Math.min(mScrollX/(float)scrollRange, 1.f)), 0); 545 } 546 } 547 548 @Override 549 public void scrollTo(int x, int y) { 550 super.scrollTo(x, y); 551 mTouchX = x; 552 mSmoothingTime = System.nanoTime() / NANOTIME_DIV; 553 } 554 555 @Override 556 public void computeScroll() { 557 if (mScroller.computeScrollOffset()) { 558 mTouchX = mScrollX = mScroller.getCurrX(); 559 mSmoothingTime = System.nanoTime() / NANOTIME_DIV; 560 mScrollY = mScroller.getCurrY(); 561 updateWallpaperOffset(); 562 postInvalidate(); 563 } else if (mNextScreen != INVALID_SCREEN) { 564 mCurrentScreen = Math.max(0, Math.min(mNextScreen, getChildCount() - 1)); 565 if (mPreviousIndicator != null) { 566 mPreviousIndicator.setLevel(mCurrentScreen); 567 mNextIndicator.setLevel(mCurrentScreen); 568 } 569 Launcher.setScreen(mCurrentScreen); 570 mNextScreen = INVALID_SCREEN; 571 clearChildrenCache(); 572 } else if (mTouchState == TOUCH_STATE_SCROLLING) { 573 final float now = System.nanoTime() / NANOTIME_DIV; 574 final float e = (float) Math.exp((now - mSmoothingTime) / SMOOTHING_CONSTANT); 575 final float dx = mTouchX - mScrollX; 576 mScrollX += dx * e; 577 mSmoothingTime = now; 578 579 // Keep generating points as long as we're more than 1px away from the target 580 if (dx > 1.f || dx < -1.f) { 581 updateWallpaperOffset(); 582 postInvalidate(); 583 } 584 } 585 } 586 587 @Override 588 protected void dispatchDraw(Canvas canvas) { 589 boolean restore = false; 590 int restoreCount = 0; 591 592 // ViewGroup.dispatchDraw() supports many features we don't need: 593 // clip to padding, layout animation, animation listener, disappearing 594 // children, etc. The following implementation attempts to fast-track 595 // the drawing dispatch by drawing only what we know needs to be drawn. 596 597 boolean fastDraw = mTouchState != TOUCH_STATE_SCROLLING && mNextScreen == INVALID_SCREEN; 598 // If we are not scrolling or flinging, draw only the current screen 599 if (fastDraw) { 600 drawChild(canvas, getChildAt(mCurrentScreen), getDrawingTime()); 601 } else { 602 final long drawingTime = getDrawingTime(); 603 final float scrollPos = (float) mScrollX / getWidth(); 604 final int leftScreen = (int) scrollPos; 605 final int rightScreen = leftScreen + 1; 606 if (leftScreen >= 0) { 607 drawChild(canvas, getChildAt(leftScreen), drawingTime); 608 } 609 if (scrollPos != leftScreen && rightScreen < getChildCount()) { 610 drawChild(canvas, getChildAt(rightScreen), drawingTime); 611 } 612 } 613 614 if (restore) { 615 canvas.restoreToCount(restoreCount); 616 } 617 } 618 619 protected void onAttachedToWindow() { 620 super.onAttachedToWindow(); 621 computeScroll(); 622 mDragController.setWindowToken(getWindowToken()); 623 } 624 625 @Override 626 protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { 627 super.onMeasure(widthMeasureSpec, heightMeasureSpec); 628 629 final int width = MeasureSpec.getSize(widthMeasureSpec); 630 final int widthMode = MeasureSpec.getMode(widthMeasureSpec); 631 if (widthMode != MeasureSpec.EXACTLY) { 632 throw new IllegalStateException("Workspace can only be used in EXACTLY mode."); 633 } 634 635 final int heightMode = MeasureSpec.getMode(heightMeasureSpec); 636 if (heightMode != MeasureSpec.EXACTLY) { 637 throw new IllegalStateException("Workspace can only be used in EXACTLY mode."); 638 } 639 640 // The children are given the same width and height as the workspace 641 final int count = getChildCount(); 642 for (int i = 0; i < count; i++) { 643 getChildAt(i).measure(widthMeasureSpec, heightMeasureSpec); 644 } 645 646 if (mFirstLayout) { 647 setHorizontalScrollBarEnabled(false); 648 scrollTo(mCurrentScreen * width, 0); 649 setHorizontalScrollBarEnabled(true); 650 updateWallpaperOffset(width * (getChildCount() - 1)); 651 mFirstLayout = false; 652 } 653 } 654 655 @Override 656 protected void onLayout(boolean changed, int left, int top, int right, int bottom) { 657 int childLeft = 0; 658 659 final int count = getChildCount(); 660 for (int i = 0; i < count; i++) { 661 final View child = getChildAt(i); 662 if (child.getVisibility() != View.GONE) { 663 final int childWidth = child.getMeasuredWidth(); 664 child.layout(childLeft, 0, childLeft + childWidth, child.getMeasuredHeight()); 665 childLeft += childWidth; 666 } 667 } 668 669 if (LauncherApplication.isInPlaceRotationEnabled()) { 670 // When the device is rotated, the scroll position of the current screen 671 // needs to be refreshed 672 setCurrentScreen(getCurrentScreen()); 673 } 674 } 675 676 @Override 677 public boolean requestChildRectangleOnScreen(View child, Rect rectangle, boolean immediate) { 678 int screen = indexOfChild(child); 679 if (screen != mCurrentScreen || !mScroller.isFinished()) { 680 if (!mLauncher.isWorkspaceLocked()) { 681 snapToScreen(screen); 682 } 683 return true; 684 } 685 return false; 686 } 687 688 @Override 689 protected boolean onRequestFocusInDescendants(int direction, Rect previouslyFocusedRect) { 690 if (!mLauncher.isAllAppsVisible()) { 691 final Folder openFolder = getOpenFolder(); 692 if (openFolder != null) { 693 return openFolder.requestFocus(direction, previouslyFocusedRect); 694 } else { 695 int focusableScreen; 696 if (mNextScreen != INVALID_SCREEN) { 697 focusableScreen = mNextScreen; 698 } else { 699 focusableScreen = mCurrentScreen; 700 } 701 getChildAt(focusableScreen).requestFocus(direction, previouslyFocusedRect); 702 } 703 } 704 return false; 705 } 706 707 @Override 708 public boolean dispatchUnhandledMove(View focused, int direction) { 709 if (direction == View.FOCUS_LEFT) { 710 if (getCurrentScreen() > 0) { 711 snapToScreen(getCurrentScreen() - 1); 712 return true; 713 } 714 } else if (direction == View.FOCUS_RIGHT) { 715 if (getCurrentScreen() < getChildCount() - 1) { 716 snapToScreen(getCurrentScreen() + 1); 717 return true; 718 } 719 } 720 return super.dispatchUnhandledMove(focused, direction); 721 } 722 723 @Override 724 public void addFocusables(ArrayList<View> views, int direction, int focusableMode) { 725 if (!mLauncher.isAllAppsVisible()) { 726 final Folder openFolder = getOpenFolder(); 727 if (openFolder == null) { 728 getChildAt(mCurrentScreen).addFocusables(views, direction); 729 if (direction == View.FOCUS_LEFT) { 730 if (mCurrentScreen > 0) { 731 getChildAt(mCurrentScreen - 1).addFocusables(views, direction); 732 } 733 } else if (direction == View.FOCUS_RIGHT) { 734 if (mCurrentScreen < getChildCount() - 1) { 735 getChildAt(mCurrentScreen + 1).addFocusables(views, direction); 736 } 737 } 738 } else { 739 openFolder.addFocusables(views, direction); 740 } 741 } 742 } 743 744 @Override 745 public boolean dispatchTouchEvent(MotionEvent ev) { 746 if (ev.getAction() == MotionEvent.ACTION_DOWN) { 747 if (mLauncher.isWorkspaceLocked() || mLauncher.isAllAppsVisible()) { 748 return false; 749 } 750 } 751 return super.dispatchTouchEvent(ev); 752 } 753 754 @Override 755 public boolean onInterceptTouchEvent(MotionEvent ev) { 756 if (mInterceptTouchListener != null && mInterceptTouchListener.onTouch(this, ev)) { 757 return true; 758 } 759 final boolean workspaceLocked = mLauncher.isWorkspaceLocked(); 760 final boolean allAppsVisible = mLauncher.isAllAppsVisible(); 761 if (workspaceLocked || allAppsVisible) { 762 return false; // We don't want the events. Let them fall through to the all apps view. 763 } 764 765 /* 766 * This method JUST determines whether we want to intercept the motion. 767 * If we return true, onTouchEvent will be called and we do the actual 768 * scrolling there. 769 */ 770 771 /* 772 * Shortcut the most recurring case: the user is in the dragging 773 * state and he is moving his finger. We want to intercept this 774 * motion. 775 */ 776 final int action = ev.getAction(); 777 if ((action == MotionEvent.ACTION_MOVE) && (mTouchState != TOUCH_STATE_REST)) { 778 return true; 779 } 780 781 if (mVelocityTracker == null) { 782 mVelocityTracker = VelocityTracker.obtain(); 783 } 784 mVelocityTracker.addMovement(ev); 785 786 switch (action & MotionEvent.ACTION_MASK) { 787 case MotionEvent.ACTION_MOVE: { 788 /* 789 * mIsBeingDragged == false, otherwise the shortcut would have caught it. Check 790 * whether the user has moved far enough from his original down touch. 791 */ 792 793 /* 794 * Locally do absolute value. mLastMotionX is set to the y value 795 * of the down event. 796 */ 797 final int pointerIndex = ev.findPointerIndex(mActivePointerId); 798 final float x = ev.getX(pointerIndex); 799 final float y = ev.getY(pointerIndex); 800 final int xDiff = (int) Math.abs(x - mLastMotionX); 801 final int yDiff = (int) Math.abs(y - mLastMotionY); 802 803 final int touchSlop = mTouchSlop; 804 boolean xMoved = xDiff > touchSlop; 805 boolean yMoved = yDiff > touchSlop; 806 807 if (xMoved || yMoved) { 808 809 if (xMoved) { 810 // Scroll if the user moved far enough along the X axis 811 mTouchState = TOUCH_STATE_SCROLLING; 812 mLastMotionX = x; 813 mTouchX = mScrollX; 814 mSmoothingTime = System.nanoTime() / NANOTIME_DIV; 815 enableChildrenCache(mCurrentScreen - 1, mCurrentScreen + 1); 816 } 817 // Either way, cancel any pending longpress 818 if (mAllowLongPress) { 819 mAllowLongPress = false; 820 // Try canceling the long press. It could also have been scheduled 821 // by a distant descendant, so use the mAllowLongPress flag to block 822 // everything 823 final View currentScreen = getChildAt(mCurrentScreen); 824 currentScreen.cancelLongPress(); 825 } 826 } 827 break; 828 } 829 830 case MotionEvent.ACTION_DOWN: { 831 final float x = ev.getX(); 832 final float y = ev.getY(); 833 // Remember location of down touch 834 mLastMotionX = x; 835 mLastMotionY = y; 836 mActivePointerId = ev.getPointerId(0); 837 mAllowLongPress = true; 838 839 /* 840 * If being flinged and user touches the screen, initiate drag; 841 * otherwise don't. mScroller.isFinished should be false when 842 * being flinged. 843 */ 844 mTouchState = mScroller.isFinished() ? TOUCH_STATE_REST : TOUCH_STATE_SCROLLING; 845 break; 846 } 847 848 case MotionEvent.ACTION_CANCEL: 849 case MotionEvent.ACTION_UP: 850 851 if (mTouchState != TOUCH_STATE_SCROLLING) { 852 final CellLayout currentScreen = (CellLayout)getChildAt(mCurrentScreen); 853 if (!currentScreen.lastDownOnOccupiedCell()) { 854 getLocationOnScreen(mTempCell); 855 // Send a tap to the wallpaper if the last down was on empty space 856 final int pointerIndex = ev.findPointerIndex(mActivePointerId); 857 mWallpaperManager.sendWallpaperCommand(getWindowToken(), 858 "android.wallpaper.tap", 859 mTempCell[0] + (int) ev.getX(pointerIndex), 860 mTempCell[1] + (int) ev.getY(pointerIndex), 0, null); 861 } 862 } 863 864 // Release the drag 865 clearChildrenCache(); 866 mTouchState = TOUCH_STATE_REST; 867 mActivePointerId = INVALID_POINTER; 868 mAllowLongPress = false; 869 870 if (mVelocityTracker != null) { 871 mVelocityTracker.recycle(); 872 mVelocityTracker = null; 873 } 874 875 break; 876 877 case MotionEvent.ACTION_POINTER_UP: 878 onSecondaryPointerUp(ev); 879 break; 880 } 881 882 /* 883 * The only time we want to intercept motion events is if we are in the 884 * drag mode. 885 */ 886 return mTouchState != TOUCH_STATE_REST; 887 } 888 889 private void onSecondaryPointerUp(MotionEvent ev) { 890 final int pointerIndex = (ev.getAction() & MotionEvent.ACTION_POINTER_INDEX_MASK) >> 891 MotionEvent.ACTION_POINTER_INDEX_SHIFT; 892 final int pointerId = ev.getPointerId(pointerIndex); 893 if (pointerId == mActivePointerId) { 894 // This was our active pointer going up. Choose a new 895 // active pointer and adjust accordingly. 896 // TODO: Make this decision more intelligent. 897 final int newPointerIndex = pointerIndex == 0 ? 1 : 0; 898 mLastMotionX = ev.getX(newPointerIndex); 899 mLastMotionY = ev.getY(newPointerIndex); 900 mActivePointerId = ev.getPointerId(newPointerIndex); 901 if (mVelocityTracker != null) { 902 mVelocityTracker.clear(); 903 } 904 } 905 } 906 907 /** 908 * If one of our descendant views decides that it could be focused now, only 909 * pass that along if it's on the current screen. 910 * 911 * This happens when live folders requery, and if they're off screen, they 912 * end up calling requestFocus, which pulls it on screen. 913 */ 914 @Override 915 public void focusableViewAvailable(View focused) { 916 View current = getChildAt(mCurrentScreen); 917 View v = focused; 918 while (true) { 919 if (v == current) { 920 super.focusableViewAvailable(focused); 921 return; 922 } 923 if (v == this) { 924 return; 925 } 926 ViewParent parent = v.getParent(); 927 if (parent instanceof View) { 928 v = (View) v.getParent(); 929 } else { 930 return; 931 } 932 } 933 } 934 935 void enableChildrenCache(int fromScreen, int toScreen) { 936 if (fromScreen > toScreen) { 937 final int temp = fromScreen; 938 fromScreen = toScreen; 939 toScreen = temp; 940 } 941 942 final int count = getChildCount(); 943 944 fromScreen = Math.max(fromScreen, 0); 945 toScreen = Math.min(toScreen, count - 1); 946 947 for (int i = fromScreen; i <= toScreen; i++) { 948 final CellLayout layout = (CellLayout) getChildAt(i); 949 layout.setChildrenDrawnWithCacheEnabled(true); 950 layout.setChildrenDrawingCacheEnabled(true); 951 } 952 } 953 954 void clearChildrenCache() { 955 final int count = getChildCount(); 956 for (int i = 0; i < count; i++) { 957 final CellLayout layout = (CellLayout) getChildAt(i); 958 layout.setChildrenDrawnWithCacheEnabled(false); 959 } 960 } 961 962 @Override 963 public boolean onTouchEvent(MotionEvent ev) { 964 965 if (mLauncher.isWorkspaceLocked()) { 966 return false; // We don't want the events. Let them fall through to the all apps view. 967 } 968 if (mLauncher.isAllAppsVisible()) { 969 // Cancel any scrolling that is in progress. 970 if (!mScroller.isFinished()) { 971 mScroller.abortAnimation(); 972 } 973 snapToScreen(mCurrentScreen); 974 return false; // We don't want the events. Let them fall through to the all apps view. 975 } 976 977 if (mVelocityTracker == null) { 978 mVelocityTracker = VelocityTracker.obtain(); 979 } 980 mVelocityTracker.addMovement(ev); 981 982 final int action = ev.getAction(); 983 984 switch (action & MotionEvent.ACTION_MASK) { 985 case MotionEvent.ACTION_DOWN: 986 /* 987 * If being flinged and user touches, stop the fling. isFinished 988 * will be false if being flinged. 989 */ 990 if (!mScroller.isFinished()) { 991 mScroller.abortAnimation(); 992 } 993 994 // Remember where the motion event started 995 mLastMotionX = ev.getX(); 996 mActivePointerId = ev.getPointerId(0); 997 if (mTouchState == TOUCH_STATE_SCROLLING) { 998 enableChildrenCache(mCurrentScreen - 1, mCurrentScreen + 1); 999 } 1000 break; 1001 case MotionEvent.ACTION_MOVE: 1002 if (mTouchState == TOUCH_STATE_SCROLLING) { 1003 // Scroll to follow the motion event 1004 final int pointerIndex = ev.findPointerIndex(mActivePointerId); 1005 final float x = ev.getX(pointerIndex); 1006 final float deltaX = mLastMotionX - x; 1007 mLastMotionX = x; 1008 1009 if (deltaX < 0) { 1010 if (mTouchX > 0) { 1011 mTouchX += Math.max(-mTouchX, deltaX); 1012 mSmoothingTime = System.nanoTime() / NANOTIME_DIV; 1013 invalidate(); 1014 } 1015 } else if (deltaX > 0) { 1016 final float availableToScroll = getChildAt(getChildCount() - 1).getRight() - 1017 mTouchX - getWidth(); 1018 if (availableToScroll > 0) { 1019 mTouchX += Math.min(availableToScroll, deltaX); 1020 mSmoothingTime = System.nanoTime() / NANOTIME_DIV; 1021 invalidate(); 1022 } 1023 } else { 1024 awakenScrollBars(); 1025 } 1026 } 1027 break; 1028 case MotionEvent.ACTION_UP: 1029 if (mTouchState == TOUCH_STATE_SCROLLING) { 1030 final VelocityTracker velocityTracker = mVelocityTracker; 1031 velocityTracker.computeCurrentVelocity(1000, mMaximumVelocity); 1032 final int velocityX = (int) velocityTracker.getXVelocity(mActivePointerId); 1033 1034 final int screenWidth = getWidth(); 1035 final int whichScreen = (mScrollX + (screenWidth / 2)) / screenWidth; 1036 final float scrolledPos = (float) mScrollX / screenWidth; 1037 1038 if (velocityX > SNAP_VELOCITY && mCurrentScreen > 0) { 1039 // Fling hard enough to move left. 1040 // Don't fling across more than one screen at a time. 1041 final int bound = scrolledPos < whichScreen ? 1042 mCurrentScreen - 1 : mCurrentScreen; 1043 snapToScreen(Math.min(whichScreen, bound), velocityX, true); 1044 } else if (velocityX < -SNAP_VELOCITY && mCurrentScreen < getChildCount() - 1) { 1045 // Fling hard enough to move right 1046 // Don't fling across more than one screen at a time. 1047 final int bound = scrolledPos > whichScreen ? 1048 mCurrentScreen + 1 : mCurrentScreen; 1049 snapToScreen(Math.max(whichScreen, bound), velocityX, true); 1050 } else { 1051 snapToScreen(whichScreen, 0, true); 1052 } 1053 1054 if (mVelocityTracker != null) { 1055 mVelocityTracker.recycle(); 1056 mVelocityTracker = null; 1057 } 1058 } 1059 mTouchState = TOUCH_STATE_REST; 1060 mActivePointerId = INVALID_POINTER; 1061 break; 1062 case MotionEvent.ACTION_CANCEL: 1063 mTouchState = TOUCH_STATE_REST; 1064 mActivePointerId = INVALID_POINTER; 1065 break; 1066 case MotionEvent.ACTION_POINTER_UP: 1067 onSecondaryPointerUp(ev); 1068 break; 1069 } 1070 1071 return true; 1072 } 1073 1074 void snapToScreen(int whichScreen) { 1075 snapToScreen(whichScreen, 0, false); 1076 } 1077 1078 private void snapToScreen(int whichScreen, int velocity, boolean settle) { 1079 // if (!mScroller.isFinished()) return; 1080 1081 whichScreen = Math.max(0, Math.min(whichScreen, getChildCount() - 1)); 1082 1083 clearVacantCache(); 1084 enableChildrenCache(mCurrentScreen, whichScreen); 1085 1086 mNextScreen = whichScreen; 1087 1088 if (mPreviousIndicator != null) { 1089 mPreviousIndicator.setLevel(mNextScreen); 1090 mNextIndicator.setLevel(mNextScreen); 1091 } 1092 1093 View focusedChild = getFocusedChild(); 1094 if (focusedChild != null && whichScreen != mCurrentScreen && 1095 focusedChild == getChildAt(mCurrentScreen)) { 1096 focusedChild.clearFocus(); 1097 } 1098 1099 final int screenDelta = Math.max(1, Math.abs(whichScreen - mCurrentScreen)); 1100 final int newX = whichScreen * getWidth(); 1101 final int delta = newX - mScrollX; 1102 int duration = (screenDelta + 1) * 100; 1103 1104 if (!mScroller.isFinished()) { 1105 mScroller.abortAnimation(); 1106 } 1107 1108 if (settle) { 1109 mScrollInterpolator.setDistance(screenDelta); 1110 } else { 1111 mScrollInterpolator.disableSettle(); 1112 } 1113 1114 velocity = Math.abs(velocity); 1115 if (velocity > 0) { 1116 duration += (duration / (velocity / BASELINE_FLING_VELOCITY)) 1117 * FLING_VELOCITY_INFLUENCE; 1118 } else { 1119 duration += 100; 1120 } 1121 1122 awakenScrollBars(duration); 1123 mScroller.startScroll(mScrollX, 0, delta, 0, duration); 1124 invalidate(); 1125 } 1126 1127 void startDrag(CellLayout.CellInfo cellInfo) { 1128 View child = cellInfo.cell; 1129 1130 // Make sure the drag was started by a long press as opposed to a long click. 1131 if (!child.isInTouchMode()) { 1132 return; 1133 } 1134 1135 mDragInfo = cellInfo; 1136 mDragInfo.screen = mCurrentScreen; 1137 1138 CellLayout current = ((CellLayout) getChildAt(mCurrentScreen)); 1139 1140 current.onDragChild(child); 1141 mDragController.startDrag(child, this, child.getTag(), DragController.DRAG_ACTION_MOVE); 1142 invalidate(); 1143 } 1144 1145 @Override 1146 protected Parcelable onSaveInstanceState() { 1147 final SavedState state = new SavedState(super.onSaveInstanceState()); 1148 state.currentScreen = mCurrentScreen; 1149 return state; 1150 } 1151 1152 @Override 1153 protected void onRestoreInstanceState(Parcelable state) { 1154 SavedState savedState = (SavedState) state; 1155 super.onRestoreInstanceState(savedState.getSuperState()); 1156 if (savedState.currentScreen != -1) { 1157 mCurrentScreen = savedState.currentScreen; 1158 Launcher.setScreen(mCurrentScreen); 1159 } 1160 } 1161 1162 void addApplicationShortcut(ShortcutInfo info, CellLayout.CellInfo cellInfo) { 1163 addApplicationShortcut(info, cellInfo, false); 1164 } 1165 1166 void addApplicationShortcut(ShortcutInfo info, CellLayout.CellInfo cellInfo, 1167 boolean insertAtFirst) { 1168 final CellLayout layout = (CellLayout) getChildAt(cellInfo.screen); 1169 final int[] result = new int[2]; 1170 1171 layout.cellToPoint(cellInfo.cellX, cellInfo.cellY, result); 1172 onDropExternal(result[0], result[1], info, layout, insertAtFirst); 1173 } 1174 1175 public void onDrop(DragSource source, int x, int y, int xOffset, int yOffset, 1176 DragView dragView, Object dragInfo) { 1177 final CellLayout cellLayout = getCurrentDropLayout(); 1178 if (source != this) { 1179 onDropExternal(x - xOffset, y - yOffset, dragInfo, cellLayout); 1180 } else { 1181 // Move internally 1182 if (mDragInfo != null) { 1183 final View cell = mDragInfo.cell; 1184 int index = mScroller.isFinished() ? mCurrentScreen : mNextScreen; 1185 if (index != mDragInfo.screen) { 1186 final CellLayout originalCellLayout = (CellLayout) getChildAt(mDragInfo.screen); 1187 originalCellLayout.removeView(cell); 1188 addInScreen(cell, index, mDragInfo.cellX, mDragInfo.cellY, 1189 mDragInfo.spanX, mDragInfo.spanY); 1190 } 1191 mTargetCell = estimateDropCell(x - xOffset, y - yOffset, 1192 mDragInfo.spanX, mDragInfo.spanY, cell, cellLayout, 1193 mTargetCell); 1194 cellLayout.onDropChild(cell); 1195 1196 // update the item's position after drop 1197 final ItemInfo info = (ItemInfo) cell.getTag(); 1198 CellLayout.LayoutParams lp = (CellLayout.LayoutParams) cell 1199 .getLayoutParams(); 1200 lp.cellX = mTargetCell[0]; 1201 lp.cellY = mTargetCell[1]; 1202 1203 LauncherModel.moveItemInDatabase(mLauncher, info, 1204 LauncherSettings.Favorites.CONTAINER_DESKTOP, index, 1205 lp.cellX, lp.cellY); 1206 } 1207 } 1208 } 1209 1210 public void onDragEnter(DragSource source, int x, int y, int xOffset, 1211 int yOffset, DragView dragView, Object dragInfo) { 1212 clearVacantCache(); 1213 } 1214 1215 public void onDragOver(DragSource source, int x, int y, int xOffset, 1216 int yOffset, DragView dragView, Object dragInfo) { 1217 } 1218 1219 public void onDragExit(DragSource source, int x, int y, int xOffset, 1220 int yOffset, DragView dragView, Object dragInfo) { 1221 clearVacantCache(); 1222 } 1223 1224 private void onDropExternal(int x, int y, Object dragInfo, 1225 CellLayout cellLayout) { 1226 onDropExternal(x, y, dragInfo, cellLayout, false); 1227 } 1228 1229 private void onDropExternal(int x, int y, Object dragInfo, 1230 CellLayout cellLayout, boolean insertAtFirst) { 1231 // Drag from somewhere else 1232 ItemInfo info = (ItemInfo) dragInfo; 1233 1234 View view = null; 1235 1236 switch (info.itemType) { 1237 case LauncherSettings.Favorites.ITEM_TYPE_APPLICATION: 1238 case LauncherSettings.Favorites.ITEM_TYPE_SHORTCUT: 1239 if (info.container == NO_ID && info instanceof ApplicationInfo) { 1240 // Came from all apps -- make a copy 1241 info = new ShortcutInfo((ApplicationInfo) info); 1242 } 1243 view = mLauncher.createShortcut(R.layout.application, cellLayout, 1244 (ShortcutInfo) info); 1245 break; 1246 case LauncherSettings.Favorites.ITEM_TYPE_USER_FOLDER: 1247 view = FolderIcon.fromXml(R.layout.folder_icon, mLauncher, 1248 (ViewGroup) getChildAt(mCurrentScreen), 1249 ((UserFolderInfo) info)); 1250 break; 1251 case LauncherSettings.Favorites.ITEM_TYPE_APPWIDGET: 1252 cellLayout.setTagToCellInfoForPoint(x, y); 1253 mLauncher.addAppWidgetFromDrop(((LauncherAppWidgetInfo)dragInfo).providerName, cellLayout.getTag()); 1254 break; 1255 default: 1256 throw new IllegalStateException("Unknown item type: " 1257 + info.itemType); 1258 } 1259 1260 // addAppWidgetFromDrop already took care of attaching the widget view to the appropriate cell 1261 // TODO why aren't we calling addInScreen here? 1262 if (info.itemType != LauncherSettings.Favorites.ITEM_TYPE_APPWIDGET) { 1263 mTargetCell = estimateDropCell(x, y, 1, 1, view, cellLayout, 1264 mTargetCell); 1265 addInScreen(view, indexOfChild(cellLayout), mTargetCell[0], 1266 mTargetCell[1], info.spanX, info.spanY, insertAtFirst); 1267 cellLayout.onDropChild(view); 1268 CellLayout.LayoutParams lp = (CellLayout.LayoutParams) view 1269 .getLayoutParams(); 1270 1271 LauncherModel.addOrMoveItemInDatabase(mLauncher, info, 1272 LauncherSettings.Favorites.CONTAINER_DESKTOP, mCurrentScreen, 1273 lp.cellX, lp.cellY); 1274 } 1275 } 1276 1277 /** 1278 * Return the current {@link CellLayout}, correctly picking the destination 1279 * screen while a scroll is in progress. 1280 */ 1281 private CellLayout getCurrentDropLayout() { 1282 int index = mScroller.isFinished() ? mCurrentScreen : mNextScreen; 1283 return (CellLayout) getChildAt(index); 1284 } 1285 1286 /** 1287 * {@inheritDoc} 1288 */ 1289 public boolean acceptDrop(DragSource source, int x, int y, 1290 int xOffset, int yOffset, DragView dragView, Object dragInfo) { 1291 final CellLayout layout = getCurrentDropLayout(); 1292 final CellLayout.CellInfo cellInfo = mDragInfo; 1293 final int spanX = cellInfo == null ? 1 : cellInfo.spanX; 1294 final int spanY = cellInfo == null ? 1 : cellInfo.spanY; 1295 1296 if (mVacantCache == null) { 1297 final View ignoreView = cellInfo == null ? null : cellInfo.cell; 1298 mVacantCache = layout.findAllVacantCells(null, ignoreView); 1299 } 1300 1301 if (mVacantCache.findCellForSpan(mTempEstimate, spanX, spanY, false)) { 1302 return true; 1303 } else { 1304 Toast.makeText(getContext(), getContext().getString(R.string.out_of_space), Toast.LENGTH_SHORT).show(); 1305 return false; 1306 } 1307 } 1308 1309 /** 1310 * {@inheritDoc} 1311 */ 1312 public Rect estimateDropLocation(DragSource source, int x, int y, 1313 int xOffset, int yOffset, DragView dragView, Object dragInfo, Rect recycle) { 1314 final CellLayout layout = getCurrentDropLayout(); 1315 1316 final CellLayout.CellInfo cellInfo = mDragInfo; 1317 final int spanX = cellInfo == null ? 1 : cellInfo.spanX; 1318 final int spanY = cellInfo == null ? 1 : cellInfo.spanY; 1319 final View ignoreView = cellInfo == null ? null : cellInfo.cell; 1320 1321 final Rect location = recycle != null ? recycle : new Rect(); 1322 1323 // Find drop cell and convert into rectangle 1324 int[] dropCell = estimateDropCell(x - xOffset, y - yOffset, spanX, 1325 spanY, ignoreView, layout, mTempCell); 1326 1327 if (dropCell == null) { 1328 return null; 1329 } 1330 1331 layout.cellToPoint(dropCell[0], dropCell[1], mTempEstimate); 1332 location.left = mTempEstimate[0]; 1333 location.top = mTempEstimate[1]; 1334 1335 layout.cellToPoint(dropCell[0] + spanX, dropCell[1] + spanY, mTempEstimate); 1336 location.right = mTempEstimate[0]; 1337 location.bottom = mTempEstimate[1]; 1338 1339 return location; 1340 } 1341 1342 /** 1343 * Calculate the nearest cell where the given object would be dropped. 1344 */ 1345 private int[] estimateDropCell(int pixelX, int pixelY, 1346 int spanX, int spanY, View ignoreView, CellLayout layout, int[] recycle) { 1347 // Create vacant cell cache if none exists 1348 if (mVacantCache == null) { 1349 mVacantCache = layout.findAllVacantCells(null, ignoreView); 1350 } 1351 1352 // Find the best target drop location 1353 return layout.findNearestVacantArea(pixelX, pixelY, 1354 spanX, spanY, mVacantCache, recycle); 1355 } 1356 1357 void setLauncher(Launcher launcher) { 1358 mLauncher = launcher; 1359 } 1360 1361 public void setDragController(DragController dragController) { 1362 mDragController = dragController; 1363 } 1364 1365 public void onDropCompleted(View target, boolean success) { 1366 clearVacantCache(); 1367 1368 if (success) { 1369 if (target != this && mDragInfo != null) { 1370 final CellLayout cellLayout = (CellLayout) getChildAt(mDragInfo.screen); 1371 cellLayout.removeView(mDragInfo.cell); 1372 if (mDragInfo.cell instanceof DropTarget) { 1373 mDragController.removeDropTarget((DropTarget)mDragInfo.cell); 1374 } 1375 // final Object tag = mDragInfo.cell.getTag(); 1376 } 1377 } else { 1378 if (mDragInfo != null) { 1379 final CellLayout cellLayout = (CellLayout) getChildAt(mDragInfo.screen); 1380 cellLayout.onDropAborted(mDragInfo.cell); 1381 } 1382 } 1383 1384 mDragInfo = null; 1385 } 1386 1387 public void scrollLeft() { 1388 clearVacantCache(); 1389 if (mScroller.isFinished()) { 1390 if (mCurrentScreen > 0) 1391 snapToScreen(mCurrentScreen - 1); 1392 } else { 1393 if (mNextScreen > 0) 1394 snapToScreen(mNextScreen - 1); 1395 } 1396 } 1397 1398 public void scrollRight() { 1399 clearVacantCache(); 1400 if (mScroller.isFinished()) { 1401 if (mCurrentScreen < getChildCount() - 1) 1402 snapToScreen(mCurrentScreen + 1); 1403 } else { 1404 if (mNextScreen < getChildCount() - 1) 1405 snapToScreen(mNextScreen + 1); 1406 } 1407 } 1408 1409 public int getScreenForView(View v) { 1410 int result = -1; 1411 if (v != null) { 1412 ViewParent vp = v.getParent(); 1413 int count = getChildCount(); 1414 for (int i = 0; i < count; i++) { 1415 if (vp == getChildAt(i)) { 1416 return i; 1417 } 1418 } 1419 } 1420 return result; 1421 } 1422 1423 public Folder getFolderForTag(Object tag) { 1424 int screenCount = getChildCount(); 1425 for (int screen = 0; screen < screenCount; screen++) { 1426 CellLayout currentScreen = ((CellLayout) getChildAt(screen)); 1427 int count = currentScreen.getChildCount(); 1428 for (int i = 0; i < count; i++) { 1429 View child = currentScreen.getChildAt(i); 1430 CellLayout.LayoutParams lp = (CellLayout.LayoutParams) child.getLayoutParams(); 1431 if (lp.cellHSpan == 4 && lp.cellVSpan == 4 && child instanceof Folder) { 1432 Folder f = (Folder) child; 1433 if (f.getInfo() == tag && f.getInfo().opened) { 1434 return f; 1435 } 1436 } 1437 } 1438 } 1439 return null; 1440 } 1441 1442 public View getViewForTag(Object tag) { 1443 int screenCount = getChildCount(); 1444 for (int screen = 0; screen < screenCount; screen++) { 1445 CellLayout currentScreen = ((CellLayout) getChildAt(screen)); 1446 int count = currentScreen.getChildCount(); 1447 for (int i = 0; i < count; i++) { 1448 View child = currentScreen.getChildAt(i); 1449 if (child.getTag() == tag) { 1450 return child; 1451 } 1452 } 1453 } 1454 return null; 1455 } 1456 1457 /** 1458 * @return True is long presses are still allowed for the current touch 1459 */ 1460 public boolean allowLongPress() { 1461 return mAllowLongPress; 1462 } 1463 1464 /** 1465 * Set true to allow long-press events to be triggered, usually checked by 1466 * {@link Launcher} to accept or block dpad-initiated long-presses. 1467 */ 1468 public void setAllowLongPress(boolean allowLongPress) { 1469 mAllowLongPress = allowLongPress; 1470 } 1471 1472 void removeItems(final ArrayList<ApplicationInfo> apps) { 1473 final int count = getChildCount(); 1474 final PackageManager manager = getContext().getPackageManager(); 1475 final AppWidgetManager widgets = AppWidgetManager.getInstance(getContext()); 1476 1477 final HashSet<String> packageNames = new HashSet<String>(); 1478 final int appCount = apps.size(); 1479 for (int i = 0; i < appCount; i++) { 1480 packageNames.add(apps.get(i).componentName.getPackageName()); 1481 } 1482 1483 for (int i = 0; i < count; i++) { 1484 final CellLayout layout = (CellLayout) getChildAt(i); 1485 1486 // Avoid ANRs by treating each screen separately 1487 post(new Runnable() { 1488 public void run() { 1489 final ArrayList<View> childrenToRemove = new ArrayList<View>(); 1490 childrenToRemove.clear(); 1491 1492 int childCount = layout.getChildCount(); 1493 for (int j = 0; j < childCount; j++) { 1494 final View view = layout.getChildAt(j); 1495 Object tag = view.getTag(); 1496 1497 if (tag instanceof ShortcutInfo) { 1498 final ShortcutInfo info = (ShortcutInfo) tag; 1499 final Intent intent = info.intent; 1500 final ComponentName name = intent.getComponent(); 1501 1502 if (Intent.ACTION_MAIN.equals(intent.getAction()) && name != null) { 1503 for (String packageName: packageNames) { 1504 if (packageName.equals(name.getPackageName())) { 1505 // TODO: This should probably be done on a worker thread 1506 LauncherModel.deleteItemFromDatabase(mLauncher, info); 1507 childrenToRemove.add(view); 1508 } 1509 } 1510 } 1511 } else if (tag instanceof UserFolderInfo) { 1512 final UserFolderInfo info = (UserFolderInfo) tag; 1513 final ArrayList<ShortcutInfo> contents = info.contents; 1514 final ArrayList<ShortcutInfo> toRemove = new ArrayList<ShortcutInfo>(1); 1515 final int contentsCount = contents.size(); 1516 boolean removedFromFolder = false; 1517 1518 for (int k = 0; k < contentsCount; k++) { 1519 final ShortcutInfo appInfo = contents.get(k); 1520 final Intent intent = appInfo.intent; 1521 final ComponentName name = intent.getComponent(); 1522 1523 if (Intent.ACTION_MAIN.equals(intent.getAction()) && name != null) { 1524 for (String packageName: packageNames) { 1525 if (packageName.equals(name.getPackageName())) { 1526 toRemove.add(appInfo); 1527 // TODO: This should probably be done on a worker thread 1528 LauncherModel.deleteItemFromDatabase( 1529 mLauncher, appInfo); 1530 removedFromFolder = true; 1531 } 1532 } 1533 } 1534 } 1535 1536 contents.removeAll(toRemove); 1537 if (removedFromFolder) { 1538 final Folder folder = getOpenFolder(); 1539 if (folder != null) 1540 folder.notifyDataSetChanged(); 1541 } 1542 } else if (tag instanceof LiveFolderInfo) { 1543 final LiveFolderInfo info = (LiveFolderInfo) tag; 1544 final Uri uri = info.uri; 1545 final ProviderInfo providerInfo = manager.resolveContentProvider( 1546 uri.getAuthority(), 0); 1547 1548 if (providerInfo != null) { 1549 for (String packageName: packageNames) { 1550 if (packageName.equals(providerInfo.packageName)) { 1551 // TODO: This should probably be done on a worker thread 1552 LauncherModel.deleteItemFromDatabase(mLauncher, info); 1553 childrenToRemove.add(view); 1554 } 1555 } 1556 } 1557 } else if (tag instanceof LauncherAppWidgetInfo) { 1558 final LauncherAppWidgetInfo info = (LauncherAppWidgetInfo) tag; 1559 final AppWidgetProviderInfo provider = 1560 widgets.getAppWidgetInfo(info.appWidgetId); 1561 if (provider != null) { 1562 for (String packageName: packageNames) { 1563 if (packageName.equals(provider.provider.getPackageName())) { 1564 // TODO: This should probably be done on a worker thread 1565 LauncherModel.deleteItemFromDatabase(mLauncher, info); 1566 childrenToRemove.add(view); 1567 } 1568 } 1569 } 1570 } 1571 } 1572 1573 childCount = childrenToRemove.size(); 1574 for (int j = 0; j < childCount; j++) { 1575 View child = childrenToRemove.get(j); 1576 layout.removeViewInLayout(child); 1577 if (child instanceof DropTarget) { 1578 mDragController.removeDropTarget((DropTarget)child); 1579 } 1580 } 1581 1582 if (childCount > 0) { 1583 layout.requestLayout(); 1584 layout.invalidate(); 1585 } 1586 } 1587 }); 1588 } 1589 } 1590 1591 void updateShortcuts(ArrayList<ApplicationInfo> apps) { 1592 final PackageManager pm = mLauncher.getPackageManager(); 1593 1594 final int count = getChildCount(); 1595 for (int i = 0; i < count; i++) { 1596 final CellLayout layout = (CellLayout) getChildAt(i); 1597 int childCount = layout.getChildCount(); 1598 for (int j = 0; j < childCount; j++) { 1599 final View view = layout.getChildAt(j); 1600 Object tag = view.getTag(); 1601 if (tag instanceof ShortcutInfo) { 1602 ShortcutInfo info = (ShortcutInfo)tag; 1603 // We need to check for ACTION_MAIN otherwise getComponent() might 1604 // return null for some shortcuts (for instance, for shortcuts to 1605 // web pages.) 1606 final Intent intent = info.intent; 1607 final ComponentName name = intent.getComponent(); 1608 if (info.itemType == LauncherSettings.Favorites.ITEM_TYPE_APPLICATION && 1609 Intent.ACTION_MAIN.equals(intent.getAction()) && name != null) { 1610 final int appCount = apps.size(); 1611 for (int k = 0; k < appCount; k++) { 1612 ApplicationInfo app = apps.get(k); 1613 if (app.componentName.equals(name)) { 1614 info.setIcon(mIconCache.getIcon(info.intent)); 1615 ((TextView)view).setCompoundDrawablesWithIntrinsicBounds(null, 1616 new FastBitmapDrawable(info.getIcon(mIconCache)), 1617 null, null); 1618 } 1619 } 1620 } 1621 } 1622 } 1623 } 1624 } 1625 1626 void moveToDefaultScreen(boolean animate) { 1627 if (animate) { 1628 snapToScreen(mDefaultScreen); 1629 } else { 1630 setCurrentScreen(mDefaultScreen); 1631 } 1632 getChildAt(mDefaultScreen).requestFocus(); 1633 } 1634 1635 void setIndicators(Drawable previous, Drawable next) { 1636 mPreviousIndicator = previous; 1637 mNextIndicator = next; 1638 previous.setLevel(mCurrentScreen); 1639 next.setLevel(mCurrentScreen); 1640 } 1641 1642 public static class SavedState extends BaseSavedState { 1643 int currentScreen = -1; 1644 1645 SavedState(Parcelable superState) { 1646 super(superState); 1647 } 1648 1649 private SavedState(Parcel in) { 1650 super(in); 1651 currentScreen = in.readInt(); 1652 } 1653 1654 @Override 1655 public void writeToParcel(Parcel out, int flags) { 1656 super.writeToParcel(out, flags); 1657 out.writeInt(currentScreen); 1658 } 1659 1660 public static final Parcelable.Creator<SavedState> CREATOR = 1661 new Parcelable.Creator<SavedState>() { 1662 public SavedState createFromParcel(Parcel in) { 1663 return new SavedState(in); 1664 } 1665 1666 public SavedState[] newArray(int size) { 1667 return new SavedState[size]; 1668 } 1669 }; 1670 } 1671} 1672