Workspace.java revision d22015cd37ea6ef53762eca5be57daca123ff607
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.CellLayout.LayoutParams; 21 22import android.animation.Animatable; 23import android.animation.PropertyAnimator; 24import android.animation.Sequencer; 25import android.animation.Animatable.AnimatableListener; 26import android.app.WallpaperManager; 27import android.appwidget.AppWidgetManager; 28import android.appwidget.AppWidgetProviderInfo; 29import android.content.ComponentName; 30import android.content.Context; 31import android.content.Intent; 32import android.content.pm.PackageManager; 33import android.content.pm.ProviderInfo; 34import android.content.res.TypedArray; 35import android.graphics.Canvas; 36import android.graphics.Paint; 37import android.graphics.Rect; 38import android.graphics.drawable.Drawable; 39import android.net.Uri; 40import android.os.IBinder; 41import android.os.Parcel; 42import android.os.Parcelable; 43import android.util.AttributeSet; 44import android.util.Log; 45import android.view.MotionEvent; 46import android.view.VelocityTracker; 47import android.view.View; 48import android.view.ViewConfiguration; 49import android.view.ViewDebug; 50import android.view.ViewGroup; 51import android.view.ViewParent; 52import android.view.animation.Animation; 53import android.view.animation.AnimationUtils; 54import android.view.animation.Interpolator; 55import android.view.animation.RotateAnimation; 56import android.view.animation.Animation.AnimationListener; 57import android.widget.Scroller; 58import android.widget.TextView; 59import android.widget.Toast; 60 61import java.util.ArrayList; 62import java.util.HashSet; 63 64/** 65 * The workspace is a wide area with a wallpaper and a finite number of screens. 66 * Each screen contains a number of icons, folders or widgets the user can 67 * interact with. A workspace is meant to be used with a fixed width only. 68 */ 69public class Workspace extends ViewGroup 70 implements DropTarget, DragSource, DragScroller, View.OnTouchListener { 71 @SuppressWarnings({"UnusedDeclaration"}) 72 private static final String TAG = "Launcher.Workspace"; 73 private static final int INVALID_SCREEN = -1; 74 // This is how much the workspace shrinks when we enter all apps or 75 // customization mode 76 private static final float SHRINK_FACTOR = 0.16f; 77 78 /** 79 * The velocity at which a fling gesture will cause us to snap to the next 80 * screen 81 */ 82 private static final int SNAP_VELOCITY = 600; 83 84 private final WallpaperManager mWallpaperManager; 85 86 private int mDefaultScreen; 87 88 private boolean mFirstLayout = true; 89 private boolean mWaitingToShrinkToBottom = false; 90 91 private int mCurrentScreen; 92 private int mNextScreen = INVALID_SCREEN; 93 private Scroller mScroller; 94 private VelocityTracker mVelocityTracker; 95 96 /** 97 * CellInfo for the cell that is currently being dragged 98 */ 99 private CellLayout.CellInfo mDragInfo; 100 101 /** 102 * Target drop area calculated during last acceptDrop call. 103 */ 104 private int[] mTargetCell = null; 105 106 /** 107 * The CellLayout that is currently being dragged over 108 */ 109 private CellLayout mDragTargetLayout = null; 110 111 private float mLastMotionX; 112 private float mLastMotionY; 113 114 private final static int TOUCH_STATE_REST = 0; 115 private final static int TOUCH_STATE_SCROLLING = 1; 116 117 private int mTouchState = TOUCH_STATE_REST; 118 119 private OnLongClickListener mLongClickListener; 120 121 private Launcher mLauncher; 122 private IconCache mIconCache; 123 private DragController mDragController; 124 125 /** 126 * Cache of vacant cells, used during drag events and invalidated as needed. 127 */ 128 private CellLayout.CellInfo mVacantCache = null; 129 130 private int[] mTempCell = new int[2]; 131 private int[] mTempEstimate = new int[2]; 132 133 private boolean mAllowLongPress = true; 134 135 private int mTouchSlop; 136 private int mMaximumVelocity; 137 138 private static final int INVALID_POINTER = -1; 139 private static final int DEFAULT_CELL_COUNT_X = 4; 140 private static final int DEFAULT_CELL_COUNT_Y = 4; 141 142 private int mActivePointerId = INVALID_POINTER; 143 144 private Drawable mPreviousIndicator; 145 private Drawable mNextIndicator; 146 147 private static final float NANOTIME_DIV = 1000000000.0f; 148 private static final float SMOOTHING_SPEED = 0.75f; 149 private static final float SMOOTHING_CONSTANT = (float) (0.016 / Math.log(SMOOTHING_SPEED)); 150 private float mSmoothingTime; 151 private float mTouchX; 152 153 private WorkspaceOvershootInterpolator mScrollInterpolator; 154 155 private static final float BASELINE_FLING_VELOCITY = 2500.f; 156 private static final float FLING_VELOCITY_INFLUENCE = 0.4f; 157 158 private Paint mDropIndicatorPaint; 159 160 // State variable that indicated whether the screens are small (ie when you're 161 // in all apps or customize mode) 162 private boolean mIsSmall; 163 private AnimatableListener mUnshrinkAnimationListener; 164 165 private static class WorkspaceOvershootInterpolator implements Interpolator { 166 private static final float DEFAULT_TENSION = 1.3f; 167 private float mTension; 168 169 public WorkspaceOvershootInterpolator() { 170 mTension = DEFAULT_TENSION; 171 } 172 173 public void setDistance(int distance) { 174 mTension = distance > 0 ? DEFAULT_TENSION / distance : DEFAULT_TENSION; 175 } 176 177 public void disableSettle() { 178 mTension = 0.f; 179 } 180 181 public float getInterpolation(float t) { 182 // _o(t) = t * t * ((tension + 1) * t + tension) 183 // o(t) = _o(t - 1) + 1 184 t -= 1.0f; 185 return t * t * ((mTension + 1) * t + mTension) + 1.0f; 186 } 187 } 188 189 /** 190 * Used to inflate the Workspace from XML. 191 * 192 * @param context The application's context. 193 * @param attrs The attribtues set containing the Workspace's customization values. 194 */ 195 public Workspace(Context context, AttributeSet attrs) { 196 this(context, attrs, 0); 197 } 198 199 /** 200 * Used to inflate the Workspace from XML. 201 * 202 * @param context The application's context. 203 * @param attrs The attribtues set containing the Workspace's customization values. 204 * @param defStyle Unused. 205 */ 206 public Workspace(Context context, AttributeSet attrs, int defStyle) { 207 super(context, attrs, defStyle); 208 209 mWallpaperManager = WallpaperManager.getInstance(context); 210 211 TypedArray a = context.obtainStyledAttributes(attrs, 212 R.styleable.Workspace, defStyle, 0); 213 int cellCountX = a.getInt(R.styleable.Workspace_cellCountX, DEFAULT_CELL_COUNT_X); 214 int cellCountY = a.getInt(R.styleable.Workspace_cellCountY, DEFAULT_CELL_COUNT_Y); 215 mDefaultScreen = a.getInt(R.styleable.Workspace_defaultScreen, 1); 216 a.recycle(); 217 218 LauncherModel.updateWorkspaceLayoutCells(cellCountX, cellCountY); 219 setHapticFeedbackEnabled(false); 220 initWorkspace(); 221 } 222 223 /** 224 * Initializes various states for this workspace. 225 */ 226 private void initWorkspace() { 227 Context context = getContext(); 228 mScrollInterpolator = new WorkspaceOvershootInterpolator(); 229 mScroller = new Scroller(context, mScrollInterpolator); 230 mCurrentScreen = mDefaultScreen; 231 Launcher.setScreen(mCurrentScreen); 232 LauncherApplication app = (LauncherApplication)context.getApplicationContext(); 233 mIconCache = app.getIconCache(); 234 235 final ViewConfiguration configuration = ViewConfiguration.get(getContext()); 236 mTouchSlop = configuration.getScaledTouchSlop(); 237 mMaximumVelocity = configuration.getScaledMaximumFlingVelocity(); 238 mUnshrinkAnimationListener = new AnimatableListener() { 239 public void onAnimationStart(Animatable animation) {} 240 public void onAnimationEnd(Animatable animation) { 241 mIsSmall = false; 242 } 243 public void onAnimationCancel(Animatable animation) {} 244 public void onAnimationRepeat(Animatable animation) {} 245 }; 246 } 247 248 @Override 249 public void addView(View child, int index, LayoutParams params) { 250 if (!(child instanceof CellLayout)) { 251 throw new IllegalArgumentException("A Workspace can only have CellLayout children."); 252 } 253 super.addView(child, index, params); 254 } 255 256 @Override 257 public void addView(View child) { 258 if (!(child instanceof CellLayout)) { 259 throw new IllegalArgumentException("A Workspace can only have CellLayout children."); 260 } 261 super.addView(child); 262 } 263 264 @Override 265 public void addView(View child, int index) { 266 if (!(child instanceof CellLayout)) { 267 throw new IllegalArgumentException("A Workspace can only have CellLayout children."); 268 } 269 super.addView(child, index); 270 } 271 272 @Override 273 public void addView(View child, int width, int height) { 274 if (!(child instanceof CellLayout)) { 275 throw new IllegalArgumentException("A Workspace can only have CellLayout children."); 276 } 277 super.addView(child, width, height); 278 } 279 280 @Override 281 public void addView(View child, LayoutParams params) { 282 if (!(child instanceof CellLayout)) { 283 throw new IllegalArgumentException("A Workspace can only have CellLayout children."); 284 } 285 super.addView(child, params); 286 } 287 288 /** 289 * @return The open folder on the current screen, or null if there is none 290 */ 291 Folder getOpenFolder() { 292 CellLayout currentScreen = (CellLayout) getChildAt(mCurrentScreen); 293 int count = currentScreen.getChildCount(); 294 for (int i = 0; i < count; i++) { 295 View child = currentScreen.getChildAt(i); 296 if (child instanceof Folder) { 297 Folder folder = (Folder) child; 298 if (folder.getInfo().opened) 299 return folder; 300 } 301 } 302 return null; 303 } 304 305 ArrayList<Folder> getOpenFolders() { 306 final int screenCount = getChildCount(); 307 ArrayList<Folder> folders = new ArrayList<Folder>(screenCount); 308 309 for (int screen = 0; screen < screenCount; screen++) { 310 CellLayout currentScreen = (CellLayout) getChildAt(screen); 311 int count = currentScreen.getChildCount(); 312 for (int i = 0; i < count; i++) { 313 View child = currentScreen.getChildAt(i); 314 CellLayout.LayoutParams lp = (CellLayout.LayoutParams) child 315 .getLayoutParams(); 316 if (child instanceof Folder) { 317 Folder folder = (Folder) child; 318 if (folder.getInfo().opened) 319 folders.add(folder); 320 break; 321 } 322 } 323 } 324 325 return folders; 326 } 327 328 boolean isDefaultScreenShowing() { 329 return mCurrentScreen == mDefaultScreen; 330 } 331 332 /** 333 * Returns the index of the currently displayed screen. 334 * 335 * @return The index of the currently displayed screen. 336 */ 337 int getCurrentScreen() { 338 return mCurrentScreen; 339 } 340 341 /** 342 * Sets the current screen. 343 * 344 * @param currentScreen 345 */ 346 void setCurrentScreen(int currentScreen) { 347 setCurrentScreen(currentScreen, true); 348 } 349 350 void setCurrentScreen(int currentScreen, boolean animateScrolling) { 351 setCurrentScreen(currentScreen, animateScrolling, getWidth()); 352 } 353 354 void setCurrentScreen(int currentScreen, boolean animateScrolling, int screenWidth) { 355 if (!mScroller.isFinished()) 356 mScroller.abortAnimation(); 357 clearVacantCache(); 358 mCurrentScreen = Math.max(0, Math.min(currentScreen, getChildCount() - 1)); 359 if (mPreviousIndicator != null) { 360 mPreviousIndicator.setLevel(mCurrentScreen); 361 mNextIndicator.setLevel(mCurrentScreen); 362 } 363 if (animateScrolling) { 364 scrollTo(mCurrentScreen * screenWidth, 0); 365 } else { 366 mScrollX = mCurrentScreen * screenWidth; 367 } 368 updateWallpaperOffset(screenWidth * (getChildCount() - 1)); 369 invalidate(); 370 } 371 372 /** 373 * Adds the specified child in the current screen. The position and dimension of 374 * the child are defined by x, y, spanX and spanY. 375 * 376 * @param child The child to add in one of the workspace's screens. 377 * @param x The X position of the child in the screen's grid. 378 * @param y The Y position of the child in the screen's grid. 379 * @param spanX The number of cells spanned horizontally by the child. 380 * @param spanY The number of cells spanned vertically by the child. 381 */ 382 void addInCurrentScreen(View child, int x, int y, int spanX, int spanY) { 383 addInScreen(child, mCurrentScreen, x, y, spanX, spanY, false); 384 } 385 386 /** 387 * Adds the specified child in the current screen. The position and dimension of 388 * the child are defined by x, y, spanX and spanY. 389 * 390 * @param child The child to add in one of the workspace's screens. 391 * @param x The X position of the child in the screen's grid. 392 * @param y The Y position of the child in the screen's grid. 393 * @param spanX The number of cells spanned horizontally by the child. 394 * @param spanY The number of cells spanned vertically by the child. 395 * @param insert When true, the child is inserted at the beginning of the children list. 396 */ 397 void addInCurrentScreen(View child, int x, int y, int spanX, int spanY, boolean insert) { 398 addInScreen(child, mCurrentScreen, x, y, spanX, spanY, insert); 399 } 400 401 /** 402 * Adds the specified child in the specified screen. The position and dimension of 403 * the child are defined by x, y, spanX and spanY. 404 * 405 * @param child The child to add in one of the workspace's screens. 406 * @param screen The screen in which to add the child. 407 * @param x The X position of the child in the screen's grid. 408 * @param y The Y position of the child in the screen's grid. 409 * @param spanX The number of cells spanned horizontally by the child. 410 * @param spanY The number of cells spanned vertically by the child. 411 */ 412 void addInScreen(View child, int screen, int x, int y, int spanX, int spanY) { 413 addInScreen(child, screen, x, y, spanX, spanY, false); 414 } 415 416 void addInFullScreen(View child, int screen) { 417 addInScreen(child, screen, 0, 0, -1, -1); 418 } 419 420 /** 421 * Adds the specified child in the specified screen. The position and dimension of 422 * the child are defined by x, y, spanX and spanY. 423 * 424 * @param child The child to add in one of the workspace's screens. 425 * @param screen The screen in which to add the child. 426 * @param x The X position of the child in the screen's grid. 427 * @param y The Y position of the child in the screen's grid. 428 * @param spanX The number of cells spanned horizontally by the child. 429 * @param spanY The number of cells spanned vertically by the child. 430 * @param insert When true, the child is inserted at the beginning of the children list. 431 */ 432 void addInScreen(View child, int screen, int x, int y, int spanX, int spanY, boolean insert) { 433 if (screen < 0 || screen >= getChildCount()) { 434 Log.e(TAG, "The screen must be >= 0 and < " + getChildCount() 435 + " (was " + screen + "); skipping child"); 436 return; 437 } 438 439 clearVacantCache(); 440 441 final CellLayout group = (CellLayout) getChildAt(screen); 442 CellLayout.LayoutParams lp = (CellLayout.LayoutParams) child.getLayoutParams(); 443 if (lp == null) { 444 lp = new CellLayout.LayoutParams(x, y, spanX, spanY); 445 } else { 446 lp.cellX = x; 447 lp.cellY = y; 448 lp.cellHSpan = spanX; 449 lp.cellVSpan = spanY; 450 } 451 452 // Get the canonical child id to uniquely represent this view in this screen 453 int childId = LauncherModel.getCellLayoutChildId(child.getId(), screen, x, y, spanX, spanY); 454 if (!group.addViewToCellLayout(child, insert ? 0 : -1, childId, lp)) { 455 // TODO: This branch occurs when the workspace is adding views 456 // outside of the defined grid 457 // maybe we should be deleting these items from the LauncherModel? 458 Log.w(TAG, "Failed to add to item at (" + lp.cellX + "," + lp.cellY + ") to CellLayout"); 459 } 460 461 if (!(child instanceof Folder)) { 462 child.setHapticFeedbackEnabled(false); 463 child.setOnLongClickListener(mLongClickListener); 464 } 465 if (child instanceof DropTarget) { 466 mDragController.addDropTarget((DropTarget) child); 467 } 468 } 469 470 CellLayout.CellInfo findAllVacantCells(boolean[] occupied) { 471 CellLayout group = (CellLayout) getChildAt(mCurrentScreen); 472 if (group != null) { 473 return group.findAllVacantCells(occupied, null); 474 } 475 return null; 476 } 477 478 private void clearVacantCache() { 479 if (mVacantCache != null) { 480 mVacantCache.clearVacantCells(); 481 mVacantCache = null; 482 } 483 } 484 485 public boolean onTouch(View v, MotionEvent event) { 486 // this is an intercepted event being forwarded from a cell layout 487 if (mIsSmall) { 488 unshrink((CellLayout)v); 489 mLauncher.onWorkspaceUnshrink(); 490 } 491 return false; 492 } 493 494 /** 495 * Registers the specified listener on each screen contained in this workspace. 496 * 497 * @param l The listener used to respond to long clicks. 498 */ 499 @Override 500 public void setOnLongClickListener(OnLongClickListener l) { 501 mLongClickListener = l; 502 final int screenCount = getChildCount(); 503 for (int i = 0; i < screenCount; i++) { 504 getChildAt(i).setOnLongClickListener(l); 505 } 506 } 507 508 private void updateWallpaperOffset() { 509 updateWallpaperOffset(getChildAt(getChildCount() - 1).getRight() - (mRight - mLeft)); 510 } 511 512 private void updateWallpaperOffset(int scrollRange) { 513 IBinder token = getWindowToken(); 514 if (token != null) { 515 mWallpaperManager.setWallpaperOffsetSteps(1.0f / (getChildCount() - 1), 0 ); 516 mWallpaperManager.setWallpaperOffsets(getWindowToken(), 517 Math.max(0.f, Math.min(mScrollX/(float)scrollRange, 1.f)), 0); 518 } 519 } 520 521 @Override 522 public void scrollTo(int x, int y) { 523 super.scrollTo(x, y); 524 mTouchX = x; 525 mSmoothingTime = System.nanoTime() / NANOTIME_DIV; 526 } 527 528 @Override 529 public void computeScroll() { 530 if (mScroller.computeScrollOffset()) { 531 mTouchX = mScrollX = mScroller.getCurrX(); 532 mSmoothingTime = System.nanoTime() / NANOTIME_DIV; 533 mScrollY = mScroller.getCurrY(); 534 updateWallpaperOffset(); 535 postInvalidate(); 536 } else if (mNextScreen != INVALID_SCREEN) { 537 mCurrentScreen = Math.max(0, Math.min(mNextScreen, getChildCount() - 1)); 538 if (mPreviousIndicator != null) { 539 mPreviousIndicator.setLevel(mCurrentScreen); 540 mNextIndicator.setLevel(mCurrentScreen); 541 } 542 Launcher.setScreen(mCurrentScreen); 543 mNextScreen = INVALID_SCREEN; 544 clearChildrenCache(); 545 } else if (mTouchState == TOUCH_STATE_SCROLLING) { 546 final float now = System.nanoTime() / NANOTIME_DIV; 547 final float e = (float) Math.exp((now - mSmoothingTime) / SMOOTHING_CONSTANT); 548 final float dx = mTouchX - mScrollX; 549 mScrollX += dx * e; 550 mSmoothingTime = now; 551 552 // Keep generating points as long as we're more than 1px away from the target 553 if (dx > 1.f || dx < -1.f) { 554 updateWallpaperOffset(); 555 postInvalidate(); 556 } 557 } 558 } 559 560 @Override 561 protected void dispatchDraw(Canvas canvas) { 562 boolean restore = false; 563 int restoreCount = 0; 564 565 // ViewGroup.dispatchDraw() supports many features we don't need: 566 // clip to padding, layout animation, animation listener, disappearing 567 // children, etc. The following implementation attempts to fast-track 568 // the drawing dispatch by drawing only what we know needs to be drawn. 569 570 boolean fastDraw = mTouchState != TOUCH_STATE_SCROLLING && mNextScreen == INVALID_SCREEN; 571 572 // if the screens are all small, we need to draw all the screens since 573 // they're most likely all visible 574 if (mIsSmall) { 575 final int screenCount = getChildCount(); 576 for (int i = 0; i < screenCount; i++) { 577 CellLayout cl = (CellLayout)getChildAt(i); 578 drawChild(canvas, cl, getDrawingTime()); 579 } 580 } else if (fastDraw) { 581 // If we are not scrolling or flinging, draw only the current screen 582 drawChild(canvas, getChildAt(mCurrentScreen), getDrawingTime()); 583 } else { 584 final long drawingTime = getDrawingTime(); 585 final float scrollPos = (float) mScrollX / getWidth(); 586 final int leftScreen = (int) scrollPos; 587 final int rightScreen = leftScreen + 1; 588 if (leftScreen >= 0) { 589 drawChild(canvas, getChildAt(leftScreen), drawingTime); 590 } 591 if (scrollPos != leftScreen && rightScreen < getChildCount()) { 592 drawChild(canvas, getChildAt(rightScreen), drawingTime); 593 } 594 } 595 596 if (restore) { 597 canvas.restoreToCount(restoreCount); 598 } 599 } 600 601 protected void onAttachedToWindow() { 602 super.onAttachedToWindow(); 603 computeScroll(); 604 mDragController.setWindowToken(getWindowToken()); 605 } 606 607 @Override 608 protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { 609 super.onMeasure(widthMeasureSpec, heightMeasureSpec); 610 611 final int width = MeasureSpec.getSize(widthMeasureSpec); 612 final int widthMode = MeasureSpec.getMode(widthMeasureSpec); 613 if (widthMode != MeasureSpec.EXACTLY) { 614 throw new IllegalStateException("Workspace can only be used in EXACTLY mode."); 615 } 616 617 final int heightMode = MeasureSpec.getMode(heightMeasureSpec); 618 if (heightMode != MeasureSpec.EXACTLY) { 619 throw new IllegalStateException("Workspace can only be used in EXACTLY mode."); 620 } 621 622 // The children are given the same width and height as the workspace 623 final int screenCount = getChildCount(); 624 for (int i = 0; i < screenCount; i++) { 625 getChildAt(i).measure(widthMeasureSpec, heightMeasureSpec); 626 } 627 628 if (mFirstLayout) { 629 setHorizontalScrollBarEnabled(false); 630 setCurrentScreen(mCurrentScreen, false, width); 631 setHorizontalScrollBarEnabled(true); 632 } 633 } 634 635 @Override 636 protected void onLayout(boolean changed, int left, int top, int right, int bottom) { 637 final int screenCount = getChildCount(); 638 if (mFirstLayout) { 639 final int width = getWidth(); 640 for (int i = 0; i < screenCount; i++) { 641 getChildAt(i).setX(i*width); 642 } 643 mFirstLayout = false; 644 } 645 646 for (int i = 0; i < screenCount; i++) { 647 final View child = getChildAt(i); 648 if (child.getVisibility() != View.GONE) { 649 final int childX = (int)child.getX(); 650 final int childY = (int)child.getY(); 651 child.layout(childX, childY, 652 childX + child.getMeasuredWidth(), childY + child.getMeasuredHeight()); 653 } 654 } 655 656 // if shrinkToBottom() is called on initialization, it has to be deferred 657 // until after the first call to onLayout so that it has the correct width 658 if (mWaitingToShrinkToBottom) { 659 shrinkToBottom(false); 660 mWaitingToShrinkToBottom = false; 661 } 662 663 if (LauncherApplication.isInPlaceRotationEnabled()) { 664 // When the device is rotated, the scroll position of the current screen 665 // needs to be refreshed 666 setCurrentScreen(getCurrentScreen()); 667 } 668 } 669 670 @Override 671 public boolean requestChildRectangleOnScreen(View child, Rect rectangle, boolean immediate) { 672 int screen = indexOfChild(child); 673 if (screen != mCurrentScreen || !mScroller.isFinished()) { 674 if (!mLauncher.isWorkspaceLocked()) { 675 snapToScreen(screen); 676 } 677 return true; 678 } 679 return false; 680 } 681 682 @Override 683 protected boolean onRequestFocusInDescendants(int direction, Rect previouslyFocusedRect) { 684 if (!mLauncher.isAllAppsVisible()) { 685 final Folder openFolder = getOpenFolder(); 686 if (openFolder != null) { 687 return openFolder.requestFocus(direction, previouslyFocusedRect); 688 } else { 689 int focusableScreen; 690 if (mNextScreen != INVALID_SCREEN) { 691 focusableScreen = mNextScreen; 692 } else { 693 focusableScreen = mCurrentScreen; 694 } 695 getChildAt(focusableScreen).requestFocus(direction, previouslyFocusedRect); 696 } 697 } 698 return false; 699 } 700 701 @Override 702 public boolean dispatchUnhandledMove(View focused, int direction) { 703 if (direction == View.FOCUS_LEFT) { 704 if (getCurrentScreen() > 0) { 705 snapToScreen(getCurrentScreen() - 1); 706 return true; 707 } 708 } else if (direction == View.FOCUS_RIGHT) { 709 if (getCurrentScreen() < getChildCount() - 1) { 710 snapToScreen(getCurrentScreen() + 1); 711 return true; 712 } 713 } 714 return super.dispatchUnhandledMove(focused, direction); 715 } 716 717 @Override 718 public void addFocusables(ArrayList<View> views, int direction, int focusableMode) { 719 if (!mLauncher.isAllAppsVisible()) { 720 final Folder openFolder = getOpenFolder(); 721 if (openFolder == null) { 722 getChildAt(mCurrentScreen).addFocusables(views, direction); 723 if (direction == View.FOCUS_LEFT) { 724 if (mCurrentScreen > 0) { 725 getChildAt(mCurrentScreen - 1).addFocusables(views, direction); 726 } 727 } else if (direction == View.FOCUS_RIGHT) { 728 if (mCurrentScreen < getChildCount() - 1) { 729 getChildAt(mCurrentScreen + 1).addFocusables(views, direction); 730 } 731 } 732 } else { 733 openFolder.addFocusables(views, direction); 734 } 735 } 736 } 737 738 @Override 739 public boolean dispatchTouchEvent(MotionEvent ev) { 740 if (ev.getAction() == MotionEvent.ACTION_DOWN) { 741 // (In XLarge mode, the workspace is shrunken below all apps, and responds to taps 742 // ie when you click on a mini-screen, it zooms back to that screen) 743 if (mLauncher.isWorkspaceLocked() || 744 (!LauncherApplication.isScreenXLarge() && mLauncher.isAllAppsVisible())) { 745 return false; 746 } 747 } 748 return super.dispatchTouchEvent(ev); 749 } 750 751 @Override 752 public boolean onInterceptTouchEvent(MotionEvent ev) { 753 final boolean workspaceLocked = mLauncher.isWorkspaceLocked(); 754 final boolean allAppsVisible = mLauncher.isAllAppsVisible(); 755 756 // (In XLarge mode, the workspace is shrunken below all apps, and responds to taps 757 // ie when you click on a mini-screen, it zooms back to that screen) 758 if (workspaceLocked || (!LauncherApplication.isScreenXLarge() && allAppsVisible)) { 759 return false; // We don't want the events. Let them fall through to the all apps view. 760 } 761 762 /* 763 * This method JUST determines whether we want to intercept the motion. 764 * If we return true, onTouchEvent will be called and we do the actual 765 * scrolling there. 766 */ 767 768 /* 769 * Shortcut the most recurring case: the user is in the dragging 770 * state and he is moving his finger. We want to intercept this 771 * motion. 772 */ 773 final int action = ev.getAction(); 774 if ((action == MotionEvent.ACTION_MOVE) && (mTouchState != TOUCH_STATE_REST)) { 775 return true; 776 } 777 778 if (mVelocityTracker == null) { 779 mVelocityTracker = VelocityTracker.obtain(); 780 } 781 mVelocityTracker.addMovement(ev); 782 783 switch (action & MotionEvent.ACTION_MASK) { 784 case MotionEvent.ACTION_MOVE: { 785 /* 786 * mIsBeingDragged == false, otherwise the shortcut would have caught it. Check 787 * whether the user has moved far enough from his original down touch. 788 */ 789 790 /* 791 * Locally do absolute value. mLastMotionX is set to the y value 792 * of the down event. 793 */ 794 final int pointerIndex = ev.findPointerIndex(mActivePointerId); 795 final float x = ev.getX(pointerIndex); 796 final float y = ev.getY(pointerIndex); 797 final int xDiff = (int) Math.abs(x - mLastMotionX); 798 final int yDiff = (int) Math.abs(y - mLastMotionY); 799 800 final int touchSlop = mTouchSlop; 801 boolean xMoved = xDiff > touchSlop; 802 boolean yMoved = yDiff > touchSlop; 803 804 if (xMoved || yMoved) { 805 806 if (xMoved) { 807 // Scroll if the user moved far enough along the X axis 808 mTouchState = TOUCH_STATE_SCROLLING; 809 mLastMotionX = x; 810 mTouchX = mScrollX; 811 mSmoothingTime = System.nanoTime() / NANOTIME_DIV; 812 enableChildrenCache(mCurrentScreen - 1, mCurrentScreen + 1); 813 } 814 // Either way, cancel any pending longpress 815 if (mAllowLongPress) { 816 mAllowLongPress = false; 817 // Try canceling the long press. It could also have been scheduled 818 // by a distant descendant, so use the mAllowLongPress flag to block 819 // everything 820 final View currentScreen = getChildAt(mCurrentScreen); 821 currentScreen.cancelLongPress(); 822 } 823 } 824 break; 825 } 826 827 case MotionEvent.ACTION_DOWN: { 828 final float x = ev.getX(); 829 final float y = ev.getY(); 830 // Remember location of down touch 831 mLastMotionX = x; 832 mLastMotionY = y; 833 mActivePointerId = ev.getPointerId(0); 834 mAllowLongPress = true; 835 836 /* 837 * If being flinged and user touches the screen, initiate drag; 838 * otherwise don't. mScroller.isFinished should be false when 839 * being flinged. 840 */ 841 mTouchState = mScroller.isFinished() ? TOUCH_STATE_REST : TOUCH_STATE_SCROLLING; 842 break; 843 } 844 845 case MotionEvent.ACTION_CANCEL: 846 case MotionEvent.ACTION_UP: 847 848 if (mTouchState != TOUCH_STATE_SCROLLING) { 849 final CellLayout currentScreen = (CellLayout)getChildAt(mCurrentScreen); 850 if (!currentScreen.lastDownOnOccupiedCell()) { 851 getLocationOnScreen(mTempCell); 852 // Send a tap to the wallpaper if the last down was on empty space 853 final int pointerIndex = ev.findPointerIndex(mActivePointerId); 854 mWallpaperManager.sendWallpaperCommand(getWindowToken(), 855 "android.wallpaper.tap", 856 mTempCell[0] + (int) ev.getX(pointerIndex), 857 mTempCell[1] + (int) ev.getY(pointerIndex), 0, null); 858 } 859 } 860 861 // Release the drag 862 clearChildrenCache(); 863 mTouchState = TOUCH_STATE_REST; 864 mActivePointerId = INVALID_POINTER; 865 mAllowLongPress = false; 866 867 if (mVelocityTracker != null) { 868 mVelocityTracker.recycle(); 869 mVelocityTracker = null; 870 } 871 872 break; 873 874 case MotionEvent.ACTION_POINTER_UP: 875 onSecondaryPointerUp(ev); 876 break; 877 } 878 879 /* 880 * The only time we want to intercept motion events is if we are in the 881 * drag mode. 882 */ 883 return mTouchState != TOUCH_STATE_REST; 884 } 885 886 private void onSecondaryPointerUp(MotionEvent ev) { 887 final int pointerIndex = (ev.getAction() & MotionEvent.ACTION_POINTER_INDEX_MASK) >> 888 MotionEvent.ACTION_POINTER_INDEX_SHIFT; 889 final int pointerId = ev.getPointerId(pointerIndex); 890 if (pointerId == mActivePointerId) { 891 // This was our active pointer going up. Choose a new 892 // active pointer and adjust accordingly. 893 // TODO: Make this decision more intelligent. 894 final int newPointerIndex = pointerIndex == 0 ? 1 : 0; 895 mLastMotionX = ev.getX(newPointerIndex); 896 mLastMotionY = ev.getY(newPointerIndex); 897 mActivePointerId = ev.getPointerId(newPointerIndex); 898 if (mVelocityTracker != null) { 899 mVelocityTracker.clear(); 900 } 901 } 902 } 903 904 /** 905 * If one of our descendant views decides that it could be focused now, only 906 * pass that along if it's on the current screen. 907 * 908 * This happens when live folders requery, and if they're off screen, they 909 * end up calling requestFocus, which pulls it on screen. 910 */ 911 @Override 912 public void focusableViewAvailable(View focused) { 913 View current = getChildAt(mCurrentScreen); 914 View v = focused; 915 while (true) { 916 if (v == current) { 917 super.focusableViewAvailable(focused); 918 return; 919 } 920 if (v == this) { 921 return; 922 } 923 ViewParent parent = v.getParent(); 924 if (parent instanceof View) { 925 v = (View) v.getParent(); 926 } else { 927 return; 928 } 929 } 930 } 931 932 void enableChildrenCache(int fromScreen, int toScreen) { 933 if (fromScreen > toScreen) { 934 final int temp = fromScreen; 935 fromScreen = toScreen; 936 toScreen = temp; 937 } 938 939 final int screenCount = getChildCount(); 940 941 fromScreen = Math.max(fromScreen, 0); 942 toScreen = Math.min(toScreen, screenCount - 1); 943 944 for (int i = fromScreen; i <= toScreen; i++) { 945 final CellLayout layout = (CellLayout) getChildAt(i); 946 layout.setChildrenDrawnWithCacheEnabled(true); 947 layout.setChildrenDrawingCacheEnabled(true); 948 } 949 } 950 951 void clearChildrenCache() { 952 final int screenCount = getChildCount(); 953 for (int i = 0; i < screenCount; i++) { 954 final CellLayout layout = (CellLayout) getChildAt(i); 955 layout.setChildrenDrawnWithCacheEnabled(false); 956 } 957 } 958 959 @Override 960 public boolean onTouchEvent(MotionEvent ev) { 961 962 if (mLauncher.isWorkspaceLocked()) { 963 return false; // We don't want the events. Let them fall through to the all apps view. 964 } 965 if (mLauncher.isAllAppsVisible()) { 966 // Cancel any scrolling that is in progress. 967 if (!mScroller.isFinished()) { 968 mScroller.abortAnimation(); 969 } 970 snapToScreen(mCurrentScreen); 971 return false; // We don't want the events. Let them fall through to the all apps view. 972 } 973 974 if (mVelocityTracker == null) { 975 mVelocityTracker = VelocityTracker.obtain(); 976 } 977 mVelocityTracker.addMovement(ev); 978 979 final int action = ev.getAction(); 980 981 switch (action & MotionEvent.ACTION_MASK) { 982 case MotionEvent.ACTION_DOWN: 983 /* 984 * If being flinged and user touches, stop the fling. isFinished 985 * will be false if being flinged. 986 */ 987 if (!mScroller.isFinished()) { 988 mScroller.abortAnimation(); 989 } 990 991 // Remember where the motion event started 992 mLastMotionX = ev.getX(); 993 mActivePointerId = ev.getPointerId(0); 994 if (mTouchState == TOUCH_STATE_SCROLLING) { 995 enableChildrenCache(mCurrentScreen - 1, mCurrentScreen + 1); 996 } 997 break; 998 case MotionEvent.ACTION_MOVE: 999 if (mTouchState == TOUCH_STATE_SCROLLING) { 1000 // Scroll to follow the motion event 1001 final int pointerIndex = ev.findPointerIndex(mActivePointerId); 1002 final float x = ev.getX(pointerIndex); 1003 final float deltaX = mLastMotionX - x; 1004 mLastMotionX = x; 1005 1006 if (deltaX < 0) { 1007 if (mTouchX > 0) { 1008 mTouchX += Math.max(-mTouchX, deltaX); 1009 mSmoothingTime = System.nanoTime() / NANOTIME_DIV; 1010 invalidate(); 1011 } 1012 } else if (deltaX > 0) { 1013 final float availableToScroll = getChildAt(getChildCount() - 1).getRight() - 1014 mTouchX - getWidth(); 1015 if (availableToScroll > 0) { 1016 mTouchX += Math.min(availableToScroll, deltaX); 1017 mSmoothingTime = System.nanoTime() / NANOTIME_DIV; 1018 invalidate(); 1019 } 1020 } else { 1021 awakenScrollBars(); 1022 } 1023 } 1024 break; 1025 case MotionEvent.ACTION_UP: 1026 if (mTouchState == TOUCH_STATE_SCROLLING) { 1027 final VelocityTracker velocityTracker = mVelocityTracker; 1028 velocityTracker.computeCurrentVelocity(1000, mMaximumVelocity); 1029 final int velocityX = (int) velocityTracker.getXVelocity(mActivePointerId); 1030 1031 final int screenWidth = getWidth(); 1032 final int whichScreen = (mScrollX + (screenWidth / 2)) / screenWidth; 1033 final float scrolledPos = (float) mScrollX / screenWidth; 1034 1035 if (velocityX > SNAP_VELOCITY && mCurrentScreen > 0) { 1036 // Fling hard enough to move left. 1037 // Don't fling across more than one screen at a time. 1038 final int bound = scrolledPos < whichScreen ? 1039 mCurrentScreen - 1 : mCurrentScreen; 1040 snapToScreen(Math.min(whichScreen, bound), velocityX, true); 1041 } else if (velocityX < -SNAP_VELOCITY && mCurrentScreen < getChildCount() - 1) { 1042 // Fling hard enough to move right 1043 // Don't fling across more than one screen at a time. 1044 final int bound = scrolledPos > whichScreen ? 1045 mCurrentScreen + 1 : mCurrentScreen; 1046 snapToScreen(Math.max(whichScreen, bound), velocityX, true); 1047 } else { 1048 snapToScreen(whichScreen, 0, true); 1049 } 1050 1051 if (mVelocityTracker != null) { 1052 mVelocityTracker.recycle(); 1053 mVelocityTracker = null; 1054 } 1055 } 1056 mTouchState = TOUCH_STATE_REST; 1057 mActivePointerId = INVALID_POINTER; 1058 break; 1059 case MotionEvent.ACTION_CANCEL: 1060 mTouchState = TOUCH_STATE_REST; 1061 mActivePointerId = INVALID_POINTER; 1062 break; 1063 case MotionEvent.ACTION_POINTER_UP: 1064 onSecondaryPointerUp(ev); 1065 break; 1066 } 1067 1068 return true; 1069 } 1070 1071 void shrinkToTop() { 1072 shrink(true, true); 1073 } 1074 1075 void shrinkToBottom() { 1076 shrinkToBottom(true); 1077 } 1078 1079 void shrinkToBottom(boolean animated) { 1080 if (mFirstLayout) { 1081 // (mFirstLayout == "first layout has not happened yet") 1082 // if we get a call to shrink() as part of our initialization (for example, if 1083 // Launcher is started in All Apps mode) then we need to wait for a layout call 1084 // to get our width so we can layout the mini-screen views correctly 1085 mWaitingToShrinkToBottom = true; 1086 } else { 1087 shrink(false, animated); 1088 } 1089 } 1090 1091 // we use this to shrink the workspace for the all apps view and the customize view 1092 private void shrink(boolean shrinkToTop, boolean animated) { 1093 mIsSmall = true; 1094 final int screenWidth = getWidth(); 1095 final int screenHeight = getHeight(); 1096 final int scaledScreenWidth = (int)(SHRINK_FACTOR*screenWidth); 1097 final int scaledScreenHeight = (int)(SHRINK_FACTOR*screenHeight); 1098 final float scaledSpacing = getResources().getDimension(R.dimen.smallScreenSpacing); 1099 1100 final int screenCount = getChildCount(); 1101 float totalWidth = screenCount * scaledScreenWidth + (screenCount - 1) * scaledSpacing; 1102 1103 float newY = getResources().getDimension(R.dimen.smallScreenVerticalMargin); 1104 if (!shrinkToTop) { 1105 newY = screenHeight - newY - scaledScreenHeight; 1106 } 1107 1108 // We animate all the screens to the centered position in workspace 1109 // At the same time, the screens become greyed/dimmed 1110 1111 // newX is initialized to the left-most position of the centered screens 1112 float newX = (mCurrentScreen + 1) * screenWidth - screenWidth / 2 - totalWidth / 2; 1113 Sequencer s = new Sequencer(); 1114 for (int i = 0; i < screenCount; i++) { 1115 CellLayout cl = (CellLayout) getChildAt(i); 1116 if (animated) { 1117 PropertyAnimator translateX = new PropertyAnimator( 1118 500, cl, "x", cl.getX(), (int) newX); 1119 PropertyAnimator translateY = new PropertyAnimator( 1120 500, cl, "y", cl.getY(), (int) newY); 1121 PropertyAnimator scaleX = new PropertyAnimator( 1122 500, cl, "scaleX", cl.getScaleX(), SHRINK_FACTOR); 1123 PropertyAnimator scaleY = new PropertyAnimator( 1124 500, cl, "scaleY", cl.getScaleY(), SHRINK_FACTOR); 1125 PropertyAnimator alpha = new PropertyAnimator( 1126 500, cl, "dimmedBitmapAlpha", cl.getDimmedBitmapAlpha(), 1.0f); 1127 Sequencer.Builder b = s.play(translateX); 1128 b.with(translateY); 1129 b.with(scaleX); 1130 b.with(scaleY); 1131 b.with(alpha); 1132 } else { 1133 cl.setX((int)newX); 1134 cl.setY((int)newY); 1135 cl.setScaleX(SHRINK_FACTOR); 1136 cl.setScaleY(SHRINK_FACTOR); 1137 cl.setDimmedBitmapAlpha(1.0f); 1138 } 1139 // increment newX for the next screen 1140 newX += scaledScreenWidth + scaledSpacing; 1141 cl.setOnInterceptTouchListener(this); 1142 } 1143 setChildrenDrawnWithCacheEnabled(true); 1144 s.start(); 1145 } 1146 1147 // We call this when we trigger an unshrink by clicking on the CellLayout cl 1148 private void unshrink(CellLayout clThatWasClicked) { 1149 if (mIsSmall) { 1150 int newCurrentScreen = mCurrentScreen; 1151 final int screenCount = getChildCount(); 1152 for (int i = 0; i < screenCount; i++) { 1153 if (getChildAt(i) == clThatWasClicked) { 1154 newCurrentScreen = i; 1155 } 1156 } 1157 final int delta = (newCurrentScreen - mCurrentScreen)*getWidth(); 1158 for (int i = 0; i < screenCount; i++) { 1159 CellLayout cl = (CellLayout) getChildAt(i); 1160 cl.setX(cl.getX() + delta); 1161 } 1162 mScrollX = newCurrentScreen * getWidth(); 1163 1164 unshrink(); 1165 setCurrentScreen(newCurrentScreen); 1166 } 1167 } 1168 1169 public void unshrink() { 1170 if (mIsSmall) { 1171 final int screenWidth = getWidth(); 1172 Sequencer s = new Sequencer(); 1173 final int screenCount = getChildCount(); 1174 for (int i = 0; i < screenCount; i++) { 1175 CellLayout cl = (CellLayout)getChildAt(i); 1176 int x = screenWidth * i; 1177 1178 PropertyAnimator translateX = new PropertyAnimator(500, cl, "x", cl.getX(), x); 1179 PropertyAnimator translateY = new PropertyAnimator(500, cl, "y", cl.getY(), 0); 1180 PropertyAnimator scaleX = new PropertyAnimator(500, cl, "scaleX", cl.getScaleX(), 1.0f); 1181 PropertyAnimator scaleY = new PropertyAnimator(500, cl, "scaleY", cl.getScaleY(), 1.0f); 1182 PropertyAnimator alpha = new PropertyAnimator( 1183 500, cl, "dimmedBitmapAlpha", cl.getDimmedBitmapAlpha(), 0.0f); 1184 Sequencer.Builder b = s.play(translateX); 1185 b.with(translateY); 1186 b.with(scaleX); 1187 b.with(scaleY); 1188 b.with(alpha); 1189 } 1190 s.addListener(mUnshrinkAnimationListener); 1191 s.start(); 1192 } 1193 } 1194 1195 void snapToScreen(int whichScreen) { 1196 snapToScreen(whichScreen, 0, false); 1197 } 1198 1199 private void snapToScreen(int whichScreen, int velocity, boolean settle) { 1200 // if (!mScroller.isFinished()) return; 1201 1202 whichScreen = Math.max(0, Math.min(whichScreen, getChildCount() - 1)); 1203 1204 clearVacantCache(); 1205 enableChildrenCache(mCurrentScreen, whichScreen); 1206 1207 mNextScreen = whichScreen; 1208 1209 if (mPreviousIndicator != null) { 1210 mPreviousIndicator.setLevel(mNextScreen); 1211 mNextIndicator.setLevel(mNextScreen); 1212 } 1213 1214 View focusedChild = getFocusedChild(); 1215 if (focusedChild != null && whichScreen != mCurrentScreen && 1216 focusedChild == getChildAt(mCurrentScreen)) { 1217 focusedChild.clearFocus(); 1218 } 1219 1220 final int screenDelta = Math.max(1, Math.abs(whichScreen - mCurrentScreen)); 1221 final int newX = whichScreen * getWidth(); 1222 final int delta = newX - mScrollX; 1223 int duration = (screenDelta + 1) * 100; 1224 1225 if (!mScroller.isFinished()) { 1226 mScroller.abortAnimation(); 1227 } 1228 1229 if (settle) { 1230 mScrollInterpolator.setDistance(screenDelta); 1231 } else { 1232 mScrollInterpolator.disableSettle(); 1233 } 1234 1235 velocity = Math.abs(velocity); 1236 if (velocity > 0) { 1237 duration += (duration / (velocity / BASELINE_FLING_VELOCITY)) 1238 * FLING_VELOCITY_INFLUENCE; 1239 } else { 1240 duration += 100; 1241 } 1242 1243 awakenScrollBars(duration); 1244 mScroller.startScroll(mScrollX, 0, delta, 0, duration); 1245 invalidate(); 1246 } 1247 1248 void startDrag(CellLayout.CellInfo cellInfo) { 1249 View child = cellInfo.cell; 1250 1251 // Make sure the drag was started by a long press as opposed to a long click. 1252 if (!child.isInTouchMode()) { 1253 return; 1254 } 1255 1256 mDragInfo = cellInfo; 1257 mDragInfo.screen = mCurrentScreen; 1258 1259 CellLayout current = ((CellLayout) getChildAt(mCurrentScreen)); 1260 1261 current.onDragChild(child); 1262 mDragController.startDrag(child, this, child.getTag(), DragController.DRAG_ACTION_MOVE); 1263 invalidate(); 1264 } 1265 1266 @Override 1267 protected Parcelable onSaveInstanceState() { 1268 final SavedState state = new SavedState(super.onSaveInstanceState()); 1269 state.currentScreen = mCurrentScreen; 1270 return state; 1271 } 1272 1273 @Override 1274 protected void onRestoreInstanceState(Parcelable state) { 1275 SavedState savedState = (SavedState) state; 1276 super.onRestoreInstanceState(savedState.getSuperState()); 1277 if (savedState.currentScreen != -1) { 1278 setCurrentScreen(savedState.currentScreen, false); 1279 Launcher.setScreen(mCurrentScreen); 1280 } 1281 } 1282 1283 void addApplicationShortcut(ShortcutInfo info, CellLayout.CellInfo cellInfo) { 1284 addApplicationShortcut(info, cellInfo, false); 1285 } 1286 1287 void addApplicationShortcut(ShortcutInfo info, CellLayout.CellInfo cellInfo, 1288 boolean insertAtFirst) { 1289 final CellLayout layout = (CellLayout) getChildAt(cellInfo.screen); 1290 final int[] result = new int[2]; 1291 1292 layout.cellToPoint(cellInfo.cellX, cellInfo.cellY, result); 1293 onDropExternal(result[0], result[1], info, layout, insertAtFirst); 1294 } 1295 1296 public void onDrop(DragSource source, int x, int y, int xOffset, int yOffset, 1297 DragView dragView, Object dragInfo) { 1298 final CellLayout cellLayout = getCurrentDropLayout(); 1299 if (source != this) { 1300 onDropExternal(x - xOffset, y - yOffset, dragInfo, cellLayout); 1301 } else { 1302 // Move internally 1303 if (mDragInfo != null) { 1304 final View cell = mDragInfo.cell; 1305 int index = mScroller.isFinished() ? mCurrentScreen : mNextScreen; 1306 if (index != mDragInfo.screen) { 1307 final CellLayout originalCellLayout = (CellLayout) getChildAt(mDragInfo.screen); 1308 originalCellLayout.removeView(cell); 1309 addInScreen(cell, index, mDragInfo.cellX, mDragInfo.cellY, 1310 mDragInfo.spanX, mDragInfo.spanY); 1311 } 1312 mTargetCell = estimateDropCell(x - xOffset, y - yOffset, 1313 mDragInfo.spanX, mDragInfo.spanY, cell, cellLayout, 1314 mTargetCell); 1315 cellLayout.onDropChild(cell); 1316 1317 // update the item's position after drop 1318 final ItemInfo info = (ItemInfo) cell.getTag(); 1319 CellLayout.LayoutParams lp = (CellLayout.LayoutParams) cell 1320 .getLayoutParams(); 1321 lp.cellX = mTargetCell[0]; 1322 lp.cellY = mTargetCell[1]; 1323 1324 LauncherModel.moveItemInDatabase(mLauncher, info, 1325 LauncherSettings.Favorites.CONTAINER_DESKTOP, index, 1326 lp.cellX, lp.cellY); 1327 } 1328 } 1329 } 1330 1331 public void onDragEnter(DragSource source, int x, int y, int xOffset, 1332 int yOffset, DragView dragView, Object dragInfo) { 1333 clearVacantCache(); 1334 } 1335 1336 public DropTarget getDropTargetDelegate(DragSource source, int x, int y, int xOffset, int yOffset, 1337 DragView dragView, Object dragInfo) { 1338 1339 // We may need to delegate the drag to a child view. If a 1x1 item 1340 // would land in a cell occupied by a DragTarget (e.g. a Folder), 1341 // then drag events should be handled by that child. 1342 1343 ItemInfo item = (ItemInfo)dragInfo; 1344 CellLayout currentLayout = getCurrentDropLayout(); 1345 1346 int dragPointX, dragPointY; 1347 if (item.spanX == 1 && item.spanY == 1) { 1348 // For a 1x1, calculate the drop cell exactly as in onDragOver 1349 dragPointX = x - xOffset; 1350 dragPointY = y - yOffset; 1351 } else { 1352 // Otherwise, use the exact drag coordinates 1353 dragPointX = x; 1354 dragPointY = y; 1355 } 1356 1357 // If we are dragging over a cell that contains a DropTarget that will 1358 // accept the drop, delegate to that DropTarget. 1359 final int[] cellXY = mTempCell; 1360 currentLayout.estimateDropCell(dragPointX, dragPointY, item.spanX, item.spanY, cellXY); 1361 View child = currentLayout.getChildAt(cellXY[0], cellXY[1]); 1362 if (child instanceof DropTarget) { 1363 DropTarget target = (DropTarget)child; 1364 if (target.acceptDrop(source, x, y, xOffset, yOffset, dragView, dragInfo)) { 1365 return target; 1366 } 1367 } 1368 return null; 1369 } 1370 1371 public void onDragOver(DragSource source, int x, int y, int xOffset, int yOffset, 1372 DragView dragView, Object dragInfo) { 1373 1374 ItemInfo item = (ItemInfo)dragInfo; 1375 CellLayout currentLayout = getCurrentDropLayout(); 1376 1377 if (dragInfo instanceof LauncherAppWidgetInfo) { 1378 LauncherAppWidgetInfo widgetInfo = (LauncherAppWidgetInfo)dragInfo; 1379 1380 if (widgetInfo.spanX == -1) { 1381 // Calculate the grid spans needed to fit this widget 1382 int[] spans = currentLayout.rectToCell(widgetInfo.minWidth, widgetInfo.minHeight, null); 1383 item.spanX = spans[0]; 1384 item.spanY = spans[1]; 1385 } 1386 } 1387 if (currentLayout != mDragTargetLayout) { 1388 if (mDragTargetLayout != null) { 1389 mDragTargetLayout.onDragComplete(); 1390 } 1391 mDragTargetLayout = currentLayout; 1392 } 1393 1394 // Find the top left corner of the item 1395 int originX = x - xOffset; 1396 int originY = y - yOffset; 1397 1398 final View child = (mDragInfo == null) ? null : mDragInfo.cell; 1399 currentLayout.visualizeDropLocation(child, originX, originY, item.spanX, item.spanY); 1400 } 1401 1402 public void onDragExit(DragSource source, int x, int y, int xOffset, 1403 int yOffset, DragView dragView, Object dragInfo) { 1404 clearVacantCache(); 1405 if (mDragTargetLayout != null) { 1406 mDragTargetLayout.onDragComplete(); 1407 mDragTargetLayout = null; 1408 } 1409 } 1410 1411 private void onDropExternal(int x, int y, Object dragInfo, 1412 CellLayout cellLayout) { 1413 onDropExternal(x, y, dragInfo, cellLayout, false); 1414 } 1415 1416 private void onDropExternal(int x, int y, Object dragInfo, 1417 CellLayout cellLayout, boolean insertAtFirst) { 1418 // Drag from somewhere else 1419 ItemInfo info = (ItemInfo) dragInfo; 1420 1421 View view = null; 1422 1423 switch (info.itemType) { 1424 case LauncherSettings.Favorites.ITEM_TYPE_APPLICATION: 1425 case LauncherSettings.Favorites.ITEM_TYPE_SHORTCUT: 1426 if (info.container == NO_ID && info instanceof ApplicationInfo) { 1427 // Came from all apps -- make a copy 1428 info = new ShortcutInfo((ApplicationInfo) info); 1429 } 1430 view = mLauncher.createShortcut(R.layout.application, cellLayout, 1431 (ShortcutInfo) info); 1432 break; 1433 case LauncherSettings.Favorites.ITEM_TYPE_USER_FOLDER: 1434 view = FolderIcon.fromXml(R.layout.folder_icon, mLauncher, 1435 (ViewGroup) getChildAt(mCurrentScreen), 1436 ((UserFolderInfo) info)); 1437 break; 1438 case LauncherSettings.Favorites.ITEM_TYPE_APPWIDGET: 1439 cellLayout.setTagToCellInfoForPoint(x, y); 1440 mLauncher.addAppWidgetFromDrop(((LauncherAppWidgetInfo)dragInfo).providerName, cellLayout.getTag()); 1441 break; 1442 default: 1443 throw new IllegalStateException("Unknown item type: " 1444 + info.itemType); 1445 } 1446 1447 // If the view is null, it has already been added. 1448 if (view == null) { 1449 cellLayout.onDragComplete(); 1450 } else { 1451 mTargetCell = estimateDropCell(x, y, 1, 1, view, cellLayout, mTargetCell); 1452 addInScreen(view, indexOfChild(cellLayout), mTargetCell[0], 1453 mTargetCell[1], info.spanX, info.spanY, insertAtFirst); 1454 cellLayout.onDropChild(view); 1455 CellLayout.LayoutParams lp = (CellLayout.LayoutParams) view.getLayoutParams(); 1456 1457 LauncherModel.addOrMoveItemInDatabase(mLauncher, info, 1458 LauncherSettings.Favorites.CONTAINER_DESKTOP, mCurrentScreen, 1459 lp.cellX, lp.cellY); 1460 } 1461 } 1462 1463 /** 1464 * Return the current {@link CellLayout}, correctly picking the destination 1465 * screen while a scroll is in progress. 1466 */ 1467 private CellLayout getCurrentDropLayout() { 1468 int index = mScroller.isFinished() ? mCurrentScreen : mNextScreen; 1469 return (CellLayout) getChildAt(index); 1470 } 1471 1472 /** 1473 * {@inheritDoc} 1474 */ 1475 public boolean acceptDrop(DragSource source, int x, int y, 1476 int xOffset, int yOffset, DragView dragView, Object dragInfo) { 1477 final CellLayout layout = getCurrentDropLayout(); 1478 final CellLayout.CellInfo cellInfo = mDragInfo; 1479 final int spanX = cellInfo == null ? 1 : cellInfo.spanX; 1480 final int spanY = cellInfo == null ? 1 : cellInfo.spanY; 1481 1482 if (mVacantCache == null) { 1483 final View ignoreView = cellInfo == null ? null : cellInfo.cell; 1484 mVacantCache = layout.findAllVacantCells(null, ignoreView); 1485 } 1486 1487 if (mVacantCache.findCellForSpan(mTempEstimate, spanX, spanY, false)) { 1488 return true; 1489 } else { 1490 Toast.makeText(getContext(), getContext().getString(R.string.out_of_space), Toast.LENGTH_SHORT).show(); 1491 return false; 1492 } 1493 } 1494 1495 /** 1496 * {@inheritDoc} 1497 */ 1498 public Rect estimateDropLocation(DragSource source, int x, int y, 1499 int xOffset, int yOffset, DragView dragView, Object dragInfo, Rect recycle) { 1500 final CellLayout layout = getCurrentDropLayout(); 1501 1502 final CellLayout.CellInfo cellInfo = mDragInfo; 1503 final int spanX = cellInfo == null ? 1 : cellInfo.spanX; 1504 final int spanY = cellInfo == null ? 1 : cellInfo.spanY; 1505 final View ignoreView = cellInfo == null ? null : cellInfo.cell; 1506 1507 final Rect location = recycle != null ? recycle : new Rect(); 1508 1509 // Find drop cell and convert into rectangle 1510 int[] dropCell = estimateDropCell(x - xOffset, y - yOffset, spanX, 1511 spanY, ignoreView, layout, mTempCell); 1512 1513 if (dropCell == null) { 1514 return null; 1515 } 1516 1517 layout.cellToPoint(dropCell[0], dropCell[1], mTempEstimate); 1518 location.left = mTempEstimate[0]; 1519 location.top = mTempEstimate[1]; 1520 1521 layout.cellToPoint(dropCell[0] + spanX, dropCell[1] + spanY, mTempEstimate); 1522 location.right = mTempEstimate[0]; 1523 location.bottom = mTempEstimate[1]; 1524 1525 return location; 1526 } 1527 1528 /** 1529 * Calculate the nearest cell where the given object would be dropped. 1530 */ 1531 private int[] estimateDropCell(int pixelX, int pixelY, 1532 int spanX, int spanY, View ignoreView, CellLayout layout, int[] recycle) { 1533 1534 final int[] cellXY = mTempCell; 1535 layout.estimateDropCell(pixelX, pixelY, spanX, spanY, cellXY); 1536 layout.cellToPoint(cellXY[0], cellXY[1], mTempEstimate); 1537 1538 // Create vacant cell cache if none exists 1539 if (mVacantCache == null) { 1540 mVacantCache = layout.findAllVacantCells(null, ignoreView); 1541 } 1542 1543 // Find the best target drop location 1544 return layout.findNearestVacantArea(mTempEstimate[0], mTempEstimate[1], spanX, spanY, mVacantCache, recycle); 1545 } 1546 1547 /** 1548 * Estimate the size that a child with the given dimensions will take in the current screen. 1549 */ 1550 void estimateChildSize(int minWidth, int minHeight, int[] result) { 1551 ((CellLayout)getChildAt(mCurrentScreen)).estimateChildSize(minWidth, minHeight, result); 1552 } 1553 1554 void setLauncher(Launcher launcher) { 1555 mLauncher = launcher; 1556 } 1557 1558 public void setDragController(DragController dragController) { 1559 mDragController = dragController; 1560 } 1561 1562 public void onDropCompleted(View target, boolean success) { 1563 clearVacantCache(); 1564 1565 if (success) { 1566 if (target != this && mDragInfo != null) { 1567 final CellLayout cellLayout = (CellLayout) getChildAt(mDragInfo.screen); 1568 cellLayout.removeView(mDragInfo.cell); 1569 if (mDragInfo.cell instanceof DropTarget) { 1570 mDragController.removeDropTarget((DropTarget)mDragInfo.cell); 1571 } 1572 // final Object tag = mDragInfo.cell.getTag(); 1573 } 1574 } else { 1575 if (mDragInfo != null) { 1576 final CellLayout cellLayout = (CellLayout) getChildAt(mDragInfo.screen); 1577 cellLayout.onDropAborted(mDragInfo.cell); 1578 } 1579 } 1580 1581 mDragInfo = null; 1582 } 1583 1584 public void scrollLeft() { 1585 clearVacantCache(); 1586 if (mScroller.isFinished()) { 1587 if (mCurrentScreen > 0) 1588 snapToScreen(mCurrentScreen - 1); 1589 } else { 1590 if (mNextScreen > 0) 1591 snapToScreen(mNextScreen - 1); 1592 } 1593 } 1594 1595 public void scrollRight() { 1596 clearVacantCache(); 1597 if (mScroller.isFinished()) { 1598 if (mCurrentScreen < getChildCount() - 1) 1599 snapToScreen(mCurrentScreen + 1); 1600 } else { 1601 if (mNextScreen < getChildCount() - 1) 1602 snapToScreen(mNextScreen + 1); 1603 } 1604 } 1605 1606 public int getScreenForView(View v) { 1607 int result = -1; 1608 if (v != null) { 1609 ViewParent vp = v.getParent(); 1610 final int screenCount = getChildCount(); 1611 for (int i = 0; i < screenCount; i++) { 1612 if (vp == getChildAt(i)) { 1613 return i; 1614 } 1615 } 1616 } 1617 return result; 1618 } 1619 1620 public Folder getFolderForTag(Object tag) { 1621 final int screenCount = getChildCount(); 1622 for (int screen = 0; screen < screenCount; screen++) { 1623 CellLayout currentScreen = ((CellLayout) getChildAt(screen)); 1624 int count = currentScreen.getChildCount(); 1625 for (int i = 0; i < count; i++) { 1626 View child = currentScreen.getChildAt(i); 1627 CellLayout.LayoutParams lp = (CellLayout.LayoutParams) child.getLayoutParams(); 1628 if (lp.cellHSpan == 4 && lp.cellVSpan == 4 && child instanceof Folder) { 1629 Folder f = (Folder) child; 1630 if (f.getInfo() == tag && f.getInfo().opened) { 1631 return f; 1632 } 1633 } 1634 } 1635 } 1636 return null; 1637 } 1638 1639 public View getViewForTag(Object tag) { 1640 int screenCount = getChildCount(); 1641 for (int screen = 0; screen < screenCount; screen++) { 1642 CellLayout currentScreen = ((CellLayout) getChildAt(screen)); 1643 int count = currentScreen.getChildCount(); 1644 for (int i = 0; i < count; i++) { 1645 View child = currentScreen.getChildAt(i); 1646 if (child.getTag() == tag) { 1647 return child; 1648 } 1649 } 1650 } 1651 return null; 1652 } 1653 1654 /** 1655 * @return True is long presses are still allowed for the current touch 1656 */ 1657 public boolean allowLongPress() { 1658 return mAllowLongPress; 1659 } 1660 1661 /** 1662 * Set true to allow long-press events to be triggered, usually checked by 1663 * {@link Launcher} to accept or block dpad-initiated long-presses. 1664 */ 1665 public void setAllowLongPress(boolean allowLongPress) { 1666 mAllowLongPress = allowLongPress; 1667 } 1668 1669 void removeItems(final ArrayList<ApplicationInfo> apps) { 1670 final int screenCount = getChildCount(); 1671 final PackageManager manager = getContext().getPackageManager(); 1672 final AppWidgetManager widgets = AppWidgetManager.getInstance(getContext()); 1673 1674 final HashSet<String> packageNames = new HashSet<String>(); 1675 final int appCount = apps.size(); 1676 for (int i = 0; i < appCount; i++) { 1677 packageNames.add(apps.get(i).componentName.getPackageName()); 1678 } 1679 1680 for (int i = 0; i < screenCount; i++) { 1681 final CellLayout layout = (CellLayout) getChildAt(i); 1682 1683 // Avoid ANRs by treating each screen separately 1684 post(new Runnable() { 1685 public void run() { 1686 final ArrayList<View> childrenToRemove = new ArrayList<View>(); 1687 childrenToRemove.clear(); 1688 1689 int childCount = layout.getChildCount(); 1690 for (int j = 0; j < childCount; j++) { 1691 final View view = layout.getChildAt(j); 1692 Object tag = view.getTag(); 1693 1694 if (tag instanceof ShortcutInfo) { 1695 final ShortcutInfo info = (ShortcutInfo) tag; 1696 final Intent intent = info.intent; 1697 final ComponentName name = intent.getComponent(); 1698 1699 if (Intent.ACTION_MAIN.equals(intent.getAction()) && name != null) { 1700 for (String packageName: packageNames) { 1701 if (packageName.equals(name.getPackageName())) { 1702 // TODO: This should probably be done on a worker thread 1703 LauncherModel.deleteItemFromDatabase(mLauncher, info); 1704 childrenToRemove.add(view); 1705 } 1706 } 1707 } 1708 } else if (tag instanceof UserFolderInfo) { 1709 final UserFolderInfo info = (UserFolderInfo) tag; 1710 final ArrayList<ShortcutInfo> contents = info.contents; 1711 final ArrayList<ShortcutInfo> toRemove = new ArrayList<ShortcutInfo>(1); 1712 final int contentsCount = contents.size(); 1713 boolean removedFromFolder = false; 1714 1715 for (int k = 0; k < contentsCount; k++) { 1716 final ShortcutInfo appInfo = contents.get(k); 1717 final Intent intent = appInfo.intent; 1718 final ComponentName name = intent.getComponent(); 1719 1720 if (Intent.ACTION_MAIN.equals(intent.getAction()) && name != null) { 1721 for (String packageName: packageNames) { 1722 if (packageName.equals(name.getPackageName())) { 1723 toRemove.add(appInfo); 1724 // TODO: This should probably be done on a worker thread 1725 LauncherModel.deleteItemFromDatabase( 1726 mLauncher, appInfo); 1727 removedFromFolder = true; 1728 } 1729 } 1730 } 1731 } 1732 1733 contents.removeAll(toRemove); 1734 if (removedFromFolder) { 1735 final Folder folder = getOpenFolder(); 1736 if (folder != null) 1737 folder.notifyDataSetChanged(); 1738 } 1739 } else if (tag instanceof LiveFolderInfo) { 1740 final LiveFolderInfo info = (LiveFolderInfo) tag; 1741 final Uri uri = info.uri; 1742 final ProviderInfo providerInfo = manager.resolveContentProvider( 1743 uri.getAuthority(), 0); 1744 1745 if (providerInfo != null) { 1746 for (String packageName: packageNames) { 1747 if (packageName.equals(providerInfo.packageName)) { 1748 // TODO: This should probably be done on a worker thread 1749 LauncherModel.deleteItemFromDatabase(mLauncher, info); 1750 childrenToRemove.add(view); 1751 } 1752 } 1753 } 1754 } else if (tag instanceof LauncherAppWidgetInfo) { 1755 final LauncherAppWidgetInfo info = (LauncherAppWidgetInfo) tag; 1756 final AppWidgetProviderInfo provider = 1757 widgets.getAppWidgetInfo(info.appWidgetId); 1758 if (provider != null) { 1759 for (String packageName: packageNames) { 1760 if (packageName.equals(provider.provider.getPackageName())) { 1761 // TODO: This should probably be done on a worker thread 1762 LauncherModel.deleteItemFromDatabase(mLauncher, info); 1763 childrenToRemove.add(view); 1764 } 1765 } 1766 } 1767 } 1768 } 1769 1770 childCount = childrenToRemove.size(); 1771 for (int j = 0; j < childCount; j++) { 1772 View child = childrenToRemove.get(j); 1773 layout.removeViewInLayout(child); 1774 if (child instanceof DropTarget) { 1775 mDragController.removeDropTarget((DropTarget)child); 1776 } 1777 } 1778 1779 if (childCount > 0) { 1780 layout.requestLayout(); 1781 layout.invalidate(); 1782 } 1783 } 1784 }); 1785 } 1786 } 1787 1788 void updateShortcuts(ArrayList<ApplicationInfo> apps) { 1789 final PackageManager pm = mLauncher.getPackageManager(); 1790 1791 final int screenCount = getChildCount(); 1792 for (int i = 0; i < screenCount; i++) { 1793 final CellLayout layout = (CellLayout) getChildAt(i); 1794 int childCount = layout.getChildCount(); 1795 for (int j = 0; j < childCount; j++) { 1796 final View view = layout.getChildAt(j); 1797 Object tag = view.getTag(); 1798 if (tag instanceof ShortcutInfo) { 1799 ShortcutInfo info = (ShortcutInfo)tag; 1800 // We need to check for ACTION_MAIN otherwise getComponent() might 1801 // return null for some shortcuts (for instance, for shortcuts to 1802 // web pages.) 1803 final Intent intent = info.intent; 1804 final ComponentName name = intent.getComponent(); 1805 if (info.itemType == LauncherSettings.Favorites.ITEM_TYPE_APPLICATION && 1806 Intent.ACTION_MAIN.equals(intent.getAction()) && name != null) { 1807 final int appCount = apps.size(); 1808 for (int k = 0; k < appCount; k++) { 1809 ApplicationInfo app = apps.get(k); 1810 if (app.componentName.equals(name)) { 1811 info.setIcon(mIconCache.getIcon(info.intent)); 1812 ((TextView)view).setCompoundDrawablesWithIntrinsicBounds(null, 1813 new FastBitmapDrawable(info.getIcon(mIconCache)), 1814 null, null); 1815 } 1816 } 1817 } 1818 } 1819 } 1820 } 1821 } 1822 1823 void moveToDefaultScreen(boolean animate) { 1824 if (animate) { 1825 snapToScreen(mDefaultScreen); 1826 } else { 1827 setCurrentScreen(mDefaultScreen); 1828 } 1829 getChildAt(mDefaultScreen).requestFocus(); 1830 } 1831 1832 void setIndicators(Drawable previous, Drawable next) { 1833 mPreviousIndicator = previous; 1834 mNextIndicator = next; 1835 previous.setLevel(mCurrentScreen); 1836 next.setLevel(mCurrentScreen); 1837 } 1838 1839 public static class SavedState extends BaseSavedState { 1840 int currentScreen = -1; 1841 1842 SavedState(Parcelable superState) { 1843 super(superState); 1844 } 1845 1846 private SavedState(Parcel in) { 1847 super(in); 1848 currentScreen = in.readInt(); 1849 } 1850 1851 @Override 1852 public void writeToParcel(Parcel out, int flags) { 1853 super.writeToParcel(out, flags); 1854 out.writeInt(currentScreen); 1855 } 1856 1857 public static final Parcelable.Creator<SavedState> CREATOR = 1858 new Parcelable.Creator<SavedState>() { 1859 public SavedState createFromParcel(Parcel in) { 1860 return new SavedState(in); 1861 } 1862 1863 public SavedState[] newArray(int size) { 1864 return new SavedState[size]; 1865 } 1866 }; 1867 } 1868} 1869