The Android Open Source Project | 31dd503 | 2009-03-03 19:32:27 -0800 | [diff] [blame^] | 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 | |
| 17 | package com.android.launcher; |
| 18 | |
| 19 | import android.content.Context; |
| 20 | import android.content.Intent; |
| 21 | import android.content.ComponentName; |
| 22 | import android.content.res.TypedArray; |
| 23 | import android.graphics.Bitmap; |
| 24 | import android.graphics.Canvas; |
| 25 | import android.graphics.Paint; |
| 26 | import android.graphics.RectF; |
| 27 | import android.graphics.Rect; |
| 28 | import android.util.AttributeSet; |
| 29 | import android.view.MotionEvent; |
| 30 | import android.view.VelocityTracker; |
| 31 | import android.view.View; |
| 32 | import android.view.ViewConfiguration; |
| 33 | import android.view.ViewGroup; |
| 34 | import android.view.ViewParent; |
| 35 | import android.widget.Scroller; |
| 36 | import android.os.Parcelable; |
| 37 | import android.os.Parcel; |
| 38 | |
| 39 | import java.util.ArrayList; |
| 40 | |
| 41 | /** |
| 42 | * The workspace is a wide area with a wallpaper and a finite number of screens. Each |
| 43 | * screen contains a number of icons, folders or widgets the user can interact with. |
| 44 | * A workspace is meant to be used with a fixed width only. |
| 45 | */ |
| 46 | public class Workspace extends ViewGroup implements DropTarget, DragSource, DragScroller { |
| 47 | private static final int INVALID_SCREEN = -1; |
| 48 | |
| 49 | /** |
| 50 | * The velocity at which a fling gesture will cause us to snap to the next screen |
| 51 | */ |
| 52 | private static final int SNAP_VELOCITY = 1000; |
| 53 | |
| 54 | private int mDefaultScreen; |
| 55 | |
| 56 | private Paint mPaint; |
| 57 | private Bitmap mWallpaper; |
| 58 | |
| 59 | private int mWallpaperWidth; |
| 60 | private int mWallpaperHeight; |
| 61 | private float mWallpaperOffset; |
| 62 | private boolean mWallpaperLoaded; |
| 63 | |
| 64 | private boolean mFirstLayout = true; |
| 65 | |
| 66 | private int mCurrentScreen; |
| 67 | private int mNextScreen = INVALID_SCREEN; |
| 68 | private Scroller mScroller; |
| 69 | private VelocityTracker mVelocityTracker; |
| 70 | |
| 71 | /** |
| 72 | * CellInfo for the cell that is currently being dragged |
| 73 | */ |
| 74 | private CellLayout.CellInfo mDragInfo; |
| 75 | |
| 76 | private float mLastMotionX; |
| 77 | private float mLastMotionY; |
| 78 | |
| 79 | private final static int TOUCH_STATE_REST = 0; |
| 80 | private final static int TOUCH_STATE_SCROLLING = 1; |
| 81 | |
| 82 | private int mTouchState = TOUCH_STATE_REST; |
| 83 | |
| 84 | private OnLongClickListener mLongClickListener; |
| 85 | |
| 86 | private Launcher mLauncher; |
| 87 | private DragController mDragger; |
| 88 | |
| 89 | private int[] mTempCell = new int[2]; |
| 90 | |
| 91 | private boolean mAllowLongPress; |
| 92 | private boolean mLocked; |
| 93 | |
| 94 | private int mTouchSlop; |
| 95 | |
| 96 | final Rect mDrawerBounds = new Rect(); |
| 97 | final Rect mClipBounds = new Rect(); |
| 98 | |
| 99 | /** |
| 100 | * Used to inflate the Workspace from XML. |
| 101 | * |
| 102 | * @param context The application's context. |
| 103 | * @param attrs The attribtues set containing the Workspace's customization values. |
| 104 | */ |
| 105 | public Workspace(Context context, AttributeSet attrs) { |
| 106 | this(context, attrs, 0); |
| 107 | } |
| 108 | |
| 109 | /** |
| 110 | * Used to inflate the Workspace from XML. |
| 111 | * |
| 112 | * @param context The application's context. |
| 113 | * @param attrs The attribtues set containing the Workspace's customization values. |
| 114 | * @param defStyle Unused. |
| 115 | */ |
| 116 | public Workspace(Context context, AttributeSet attrs, int defStyle) { |
| 117 | super(context, attrs, defStyle); |
| 118 | |
| 119 | TypedArray a = context.obtainStyledAttributes(attrs, R.styleable.Workspace, defStyle, 0); |
| 120 | mDefaultScreen = a.getInt(R.styleable.Workspace_defaultScreen, 1); |
| 121 | a.recycle(); |
| 122 | |
| 123 | initWorkspace(); |
| 124 | } |
| 125 | |
| 126 | /** |
| 127 | * Initializes various states for this workspace. |
| 128 | */ |
| 129 | private void initWorkspace() { |
| 130 | mScroller = new Scroller(getContext()); |
| 131 | mCurrentScreen = mDefaultScreen; |
| 132 | Launcher.setScreen(mCurrentScreen); |
| 133 | |
| 134 | mPaint = new Paint(); |
| 135 | mPaint.setDither(false); |
| 136 | |
| 137 | mTouchSlop = ViewConfiguration.get(getContext()).getScaledTouchSlop(); |
| 138 | } |
| 139 | |
| 140 | /** |
| 141 | * Set the background's wallpaper. |
| 142 | */ |
| 143 | void loadWallpaper(Bitmap bitmap) { |
| 144 | mWallpaper = bitmap; |
| 145 | mWallpaperLoaded = true; |
| 146 | requestLayout(); |
| 147 | invalidate(); |
| 148 | } |
| 149 | |
| 150 | @Override |
| 151 | public void addView(View child, int index, LayoutParams params) { |
| 152 | if (!(child instanceof CellLayout)) { |
| 153 | throw new IllegalArgumentException("A Workspace can only have CellLayout children."); |
| 154 | } |
| 155 | super.addView(child, index, params); |
| 156 | } |
| 157 | |
| 158 | @Override |
| 159 | public void addView(View child) { |
| 160 | if (!(child instanceof CellLayout)) { |
| 161 | throw new IllegalArgumentException("A Workspace can only have CellLayout children."); |
| 162 | } |
| 163 | super.addView(child); |
| 164 | } |
| 165 | |
| 166 | @Override |
| 167 | public void addView(View child, int index) { |
| 168 | if (!(child instanceof CellLayout)) { |
| 169 | throw new IllegalArgumentException("A Workspace can only have CellLayout children."); |
| 170 | } |
| 171 | super.addView(child, index); |
| 172 | } |
| 173 | |
| 174 | @Override |
| 175 | public void addView(View child, int width, int height) { |
| 176 | if (!(child instanceof CellLayout)) { |
| 177 | throw new IllegalArgumentException("A Workspace can only have CellLayout children."); |
| 178 | } |
| 179 | super.addView(child, width, height); |
| 180 | } |
| 181 | |
| 182 | @Override |
| 183 | public void addView(View child, LayoutParams params) { |
| 184 | if (!(child instanceof CellLayout)) { |
| 185 | throw new IllegalArgumentException("A Workspace can only have CellLayout children."); |
| 186 | } |
| 187 | super.addView(child, params); |
| 188 | } |
| 189 | |
| 190 | /** |
| 191 | * @return The open folder on the current screen, or null if there is none |
| 192 | */ |
| 193 | Folder getOpenFolder() { |
| 194 | CellLayout currentScreen = (CellLayout) getChildAt(mCurrentScreen); |
| 195 | int count = currentScreen.getChildCount(); |
| 196 | for (int i = 0; i < count; i++) { |
| 197 | View child = currentScreen.getChildAt(i); |
| 198 | CellLayout.LayoutParams lp = (CellLayout.LayoutParams) child.getLayoutParams(); |
| 199 | if (lp.cellHSpan == 4 && lp.cellVSpan == 4 && child instanceof Folder) { |
| 200 | return (Folder) child; |
| 201 | } |
| 202 | } |
| 203 | return null; |
| 204 | } |
| 205 | |
| 206 | ArrayList<Folder> getOpenFolders() { |
| 207 | final int screens = getChildCount(); |
| 208 | ArrayList<Folder> folders = new ArrayList<Folder>(screens); |
| 209 | |
| 210 | for (int screen = 0; screen < screens; screen++) { |
| 211 | CellLayout currentScreen = (CellLayout) getChildAt(screen); |
| 212 | int count = currentScreen.getChildCount(); |
| 213 | for (int i = 0; i < count; i++) { |
| 214 | View child = currentScreen.getChildAt(i); |
| 215 | CellLayout.LayoutParams lp = (CellLayout.LayoutParams) child.getLayoutParams(); |
| 216 | if (lp.cellHSpan == 4 && lp.cellVSpan == 4 && child instanceof Folder) { |
| 217 | folders.add((Folder) child); |
| 218 | break; |
| 219 | } |
| 220 | } |
| 221 | } |
| 222 | |
| 223 | return folders; |
| 224 | } |
| 225 | |
| 226 | boolean isDefaultScreenShowing() { |
| 227 | return mCurrentScreen == mDefaultScreen; |
| 228 | } |
| 229 | |
| 230 | /** |
| 231 | * Returns the index of the currently displayed screen. |
| 232 | * |
| 233 | * @return The index of the currently displayed screen. |
| 234 | */ |
| 235 | int getCurrentScreen() { |
| 236 | return mCurrentScreen; |
| 237 | } |
| 238 | |
| 239 | /** |
| 240 | * Computes a bounding rectangle for a range of cells |
| 241 | * |
| 242 | * @param cellX X coordinate of upper left corner expressed as a cell position |
| 243 | * @param cellY Y coordinate of upper left corner expressed as a cell position |
| 244 | * @param cellHSpan Width in cells |
| 245 | * @param cellVSpan Height in cells |
| 246 | * @param rect Rectnagle into which to put the results |
| 247 | */ |
| 248 | public void cellToRect(int cellX, int cellY, int cellHSpan, int cellVSpan, RectF rect) { |
| 249 | ((CellLayout)getChildAt(mCurrentScreen)).cellToRect(cellX, cellY, |
| 250 | cellHSpan, cellVSpan, rect); |
| 251 | } |
| 252 | |
| 253 | /** |
| 254 | * Sets the current screen. |
| 255 | * |
| 256 | * @param currentScreen |
| 257 | */ |
| 258 | void setCurrentScreen(int currentScreen) { |
| 259 | mCurrentScreen = Math.max(0, Math.min(currentScreen, getChildCount() - 1)); |
| 260 | scrollTo(mCurrentScreen * getWidth(), 0); |
| 261 | invalidate(); |
| 262 | } |
| 263 | |
| 264 | /** |
| 265 | * Shows the default screen (defined by the firstScreen attribute in XML.) |
| 266 | */ |
| 267 | void showDefaultScreen() { |
| 268 | setCurrentScreen(mDefaultScreen); |
| 269 | } |
| 270 | |
| 271 | /** |
| 272 | * Adds the specified child in the current screen. The position and dimension of |
| 273 | * the child are defined by x, y, spanX and spanY. |
| 274 | * |
| 275 | * @param child The child to add in one of the workspace's screens. |
| 276 | * @param x The X position of the child in the screen's grid. |
| 277 | * @param y The Y position of the child in the screen's grid. |
| 278 | * @param spanX The number of cells spanned horizontally by the child. |
| 279 | * @param spanY The number of cells spanned vertically by the child. |
| 280 | */ |
| 281 | void addInCurrentScreen(View child, int x, int y, int spanX, int spanY) { |
| 282 | addInScreen(child, mCurrentScreen, x, y, spanX, spanY, false); |
| 283 | } |
| 284 | |
| 285 | /** |
| 286 | * Adds the specified child in the current screen. The position and dimension of |
| 287 | * the child are defined by x, y, spanX and spanY. |
| 288 | * |
| 289 | * @param child The child to add in one of the workspace's screens. |
| 290 | * @param x The X position of the child in the screen's grid. |
| 291 | * @param y The Y position of the child in the screen's grid. |
| 292 | * @param spanX The number of cells spanned horizontally by the child. |
| 293 | * @param spanY The number of cells spanned vertically by the child. |
| 294 | * @param insert When true, the child is inserted at the beginning of the children list. |
| 295 | */ |
| 296 | void addInCurrentScreen(View child, int x, int y, int spanX, int spanY, boolean insert) { |
| 297 | addInScreen(child, mCurrentScreen, x, y, spanX, spanY, insert); |
| 298 | } |
| 299 | |
| 300 | /** |
| 301 | * Adds the specified child in the specified screen. The position and dimension of |
| 302 | * the child are defined by x, y, spanX and spanY. |
| 303 | * |
| 304 | * @param child The child to add in one of the workspace's screens. |
| 305 | * @param screen The screen in which to add the child. |
| 306 | * @param x The X position of the child in the screen's grid. |
| 307 | * @param y The Y position of the child in the screen's grid. |
| 308 | * @param spanX The number of cells spanned horizontally by the child. |
| 309 | * @param spanY The number of cells spanned vertically by the child. |
| 310 | */ |
| 311 | void addInScreen(View child, int screen, int x, int y, int spanX, int spanY) { |
| 312 | addInScreen(child, screen, x, y, spanX, spanY, false); |
| 313 | } |
| 314 | |
| 315 | /** |
| 316 | * Adds the specified child in the specified screen. The position and dimension of |
| 317 | * the child are defined by x, y, spanX and spanY. |
| 318 | * |
| 319 | * @param child The child to add in one of the workspace's screens. |
| 320 | * @param screen The screen in which to add the child. |
| 321 | * @param x The X position of the child in the screen's grid. |
| 322 | * @param y The Y position of the child in the screen's grid. |
| 323 | * @param spanX The number of cells spanned horizontally by the child. |
| 324 | * @param spanY The number of cells spanned vertically by the child. |
| 325 | * @param insert When true, the child is inserted at the beginning of the children list. |
| 326 | */ |
| 327 | void addInScreen(View child, int screen, int x, int y, int spanX, int spanY, boolean insert) { |
| 328 | if (screen < 0 || screen >= getChildCount()) { |
| 329 | throw new IllegalStateException("The screen must be >= 0 and < " + getChildCount()); |
| 330 | } |
| 331 | |
| 332 | final CellLayout group = (CellLayout) getChildAt(screen); |
| 333 | CellLayout.LayoutParams lp = (CellLayout.LayoutParams) child.getLayoutParams(); |
| 334 | if (lp == null) { |
| 335 | lp = new CellLayout.LayoutParams(x, y, spanX, spanY); |
| 336 | } else { |
| 337 | lp.cellX = x; |
| 338 | lp.cellY = y; |
| 339 | lp.cellHSpan = spanX; |
| 340 | lp.cellVSpan = spanY; |
| 341 | } |
| 342 | group.addView(child, insert ? 0 : -1, lp); |
| 343 | if (!(child instanceof Folder)) { |
| 344 | child.setOnLongClickListener(mLongClickListener); |
| 345 | } |
| 346 | } |
| 347 | |
| 348 | void addWidget(View view, Widget widget) { |
| 349 | addInScreen(view, widget.screen, widget.cellX, widget.cellY, widget.spanX, |
| 350 | widget.spanY, false); |
| 351 | } |
| 352 | |
| 353 | void addWidget(View view, Widget widget, boolean insert) { |
| 354 | addInScreen(view, widget.screen, widget.cellX, widget.cellY, widget.spanX, |
| 355 | widget.spanY, insert); |
| 356 | } |
| 357 | |
| 358 | CellLayout.CellInfo findAllVacantCells(boolean[] occupied) { |
| 359 | CellLayout group = (CellLayout) getChildAt(mCurrentScreen); |
| 360 | if (group != null) { |
| 361 | return group.findAllVacantCells(occupied); |
| 362 | } |
| 363 | return null; |
| 364 | } |
| 365 | |
| 366 | /** |
| 367 | * Returns the coordinate of a vacant cell for the current screen. |
| 368 | */ |
| 369 | boolean getVacantCell(int[] vacant, int spanX, int spanY) { |
| 370 | CellLayout group = (CellLayout) getChildAt(mCurrentScreen); |
| 371 | if (group != null) { |
| 372 | return group.getVacantCell(vacant, spanX, spanY); |
| 373 | } |
| 374 | return false; |
| 375 | } |
| 376 | |
| 377 | /** |
| 378 | * Adds the specified child in the current screen. The position and dimension of |
| 379 | * the child are defined by x, y, spanX and spanY. |
| 380 | * |
| 381 | * @param child The child to add in one of the workspace's screens. |
| 382 | * @param spanX The number of cells spanned horizontally by the child. |
| 383 | * @param spanY The number of cells spanned vertically by the child. |
| 384 | */ |
| 385 | void fitInCurrentScreen(View child, int spanX, int spanY) { |
| 386 | fitInScreen(child, mCurrentScreen, spanX, spanY); |
| 387 | } |
| 388 | |
| 389 | /** |
| 390 | * Adds the specified child in the specified screen. The position and dimension of |
| 391 | * the child are defined by x, y, spanX and spanY. |
| 392 | * |
| 393 | * @param child The child to add in one of the workspace's screens. |
| 394 | * @param screen The screen in which to add the child. |
| 395 | * @param spanX The number of cells spanned horizontally by the child. |
| 396 | * @param spanY The number of cells spanned vertically by the child. |
| 397 | */ |
| 398 | void fitInScreen(View child, int screen, int spanX, int spanY) { |
| 399 | if (screen < 0 || screen >= getChildCount()) { |
| 400 | throw new IllegalStateException("The screen must be >= 0 and < " + getChildCount()); |
| 401 | } |
| 402 | |
| 403 | final CellLayout group = (CellLayout) getChildAt(screen); |
| 404 | boolean vacant = group.getVacantCell(mTempCell, spanX, spanY); |
| 405 | if (vacant) { |
| 406 | group.addView(child, |
| 407 | new CellLayout.LayoutParams(mTempCell[0], mTempCell[1], spanX, spanY)); |
| 408 | child.setOnLongClickListener(mLongClickListener); |
| 409 | if (!(child instanceof Folder)) { |
| 410 | child.setOnLongClickListener(mLongClickListener); |
| 411 | } |
| 412 | } |
| 413 | } |
| 414 | |
| 415 | /** |
| 416 | * Registers the specified listener on each screen contained in this workspace. |
| 417 | * |
| 418 | * @param l The listener used to respond to long clicks. |
| 419 | */ |
| 420 | @Override |
| 421 | public void setOnLongClickListener(OnLongClickListener l) { |
| 422 | mLongClickListener = l; |
| 423 | final int count = getChildCount(); |
| 424 | for (int i = 0; i < count; i++) { |
| 425 | getChildAt(i).setOnLongClickListener(l); |
| 426 | } |
| 427 | } |
| 428 | |
| 429 | @Override |
| 430 | public void computeScroll() { |
| 431 | if (mScroller.computeScrollOffset()) { |
| 432 | mScrollX = mScroller.getCurrX(); |
| 433 | mScrollY = mScroller.getCurrY(); |
| 434 | postInvalidate(); |
| 435 | } else if (mNextScreen != INVALID_SCREEN) { |
| 436 | mCurrentScreen = Math.max(0, Math.min(mNextScreen, getChildCount() - 1)); |
| 437 | Launcher.setScreen(mCurrentScreen); |
| 438 | mNextScreen = INVALID_SCREEN; |
| 439 | clearChildrenCache(); |
| 440 | } |
| 441 | } |
| 442 | |
| 443 | @Override |
| 444 | protected void dispatchDraw(Canvas canvas) { |
| 445 | // If the all apps drawer is open and the drawing region for the workspace |
| 446 | // is contained within the drawer's bounds, we skip the drawing. This requires |
| 447 | // the drawer to be fully opaque. |
| 448 | if (mLauncher.isDrawerUp()) { |
| 449 | final Rect clipBounds = mClipBounds; |
| 450 | canvas.getClipBounds(clipBounds); |
| 451 | clipBounds.offset(-mScrollX, -mScrollY); |
| 452 | if (mDrawerBounds.contains(clipBounds)) { |
| 453 | return; |
| 454 | } |
| 455 | } |
| 456 | |
| 457 | float x = mScrollX * mWallpaperOffset; |
| 458 | if (x + mWallpaperWidth < mRight - mLeft) { |
| 459 | x = mRight - mLeft - mWallpaperWidth; |
| 460 | } |
| 461 | |
| 462 | canvas.drawBitmap(mWallpaper, x, (mBottom - mTop - mWallpaperHeight) / 2, mPaint); |
| 463 | |
| 464 | // ViewGroup.dispatchDraw() supports many features we don't need: |
| 465 | // clip to padding, layout animation, animation listener, disappearing |
| 466 | // children, etc. The following implementation attempts to fast-track |
| 467 | // the drawing dispatch by drawing only what we know needs to be drawn. |
| 468 | |
| 469 | boolean fastDraw = mTouchState != TOUCH_STATE_SCROLLING && mNextScreen == INVALID_SCREEN; |
| 470 | // If we are not scrolling or flinging, draw only the current screen |
| 471 | if (fastDraw) { |
| 472 | drawChild(canvas, getChildAt(mCurrentScreen), getDrawingTime()); |
| 473 | } else { |
| 474 | final long drawingTime = getDrawingTime(); |
| 475 | // If we are flinging, draw only the current screen and the target screen |
| 476 | if (mNextScreen >= 0 && mNextScreen < getChildCount() && |
| 477 | Math.abs(mCurrentScreen - mNextScreen) == 1) { |
| 478 | drawChild(canvas, getChildAt(mCurrentScreen), drawingTime); |
| 479 | drawChild(canvas, getChildAt(mNextScreen), drawingTime); |
| 480 | } else { |
| 481 | // If we are scrolling, draw all of our children |
| 482 | final int count = getChildCount(); |
| 483 | for (int i = 0; i < count; i++) { |
| 484 | drawChild(canvas, getChildAt(i), drawingTime); |
| 485 | } |
| 486 | } |
| 487 | } |
| 488 | } |
| 489 | |
| 490 | @Override |
| 491 | protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { |
| 492 | super.onMeasure(widthMeasureSpec, heightMeasureSpec); |
| 493 | |
| 494 | final int width = MeasureSpec.getSize(widthMeasureSpec); |
| 495 | final int widthMode = MeasureSpec.getMode(widthMeasureSpec); |
| 496 | if (widthMode != MeasureSpec.EXACTLY) { |
| 497 | throw new IllegalStateException("Workspace can only be used in EXACTLY mode."); |
| 498 | } |
| 499 | |
| 500 | final int heightMode = MeasureSpec.getMode(heightMeasureSpec); |
| 501 | if (heightMode != MeasureSpec.EXACTLY) { |
| 502 | throw new IllegalStateException("Workspace can only be used in EXACTLY mode."); |
| 503 | } |
| 504 | |
| 505 | // The children are given the same width and height as the workspace |
| 506 | final int count = getChildCount(); |
| 507 | for (int i = 0; i < count; i++) { |
| 508 | getChildAt(i).measure(widthMeasureSpec, heightMeasureSpec); |
| 509 | } |
| 510 | |
| 511 | if (mWallpaperLoaded) { |
| 512 | mWallpaperLoaded = false; |
| 513 | mWallpaper = Utilities.centerToFit(mWallpaper, width, |
| 514 | MeasureSpec.getSize(heightMeasureSpec), getContext()); |
| 515 | mWallpaperWidth = mWallpaper.getWidth(); |
| 516 | mWallpaperHeight = mWallpaper.getHeight(); |
| 517 | } |
| 518 | |
| 519 | final int wallpaperWidth = mWallpaperWidth; |
| 520 | mWallpaperOffset = wallpaperWidth > width ? (count * width - wallpaperWidth) / |
| 521 | ((count - 1) * (float) width) : 1.0f; |
| 522 | |
| 523 | if (mFirstLayout) { |
| 524 | scrollTo(mCurrentScreen * width, 0); |
| 525 | mFirstLayout = false; |
| 526 | } |
| 527 | } |
| 528 | |
| 529 | @Override |
| 530 | protected void onLayout(boolean changed, int left, int top, int right, int bottom) { |
| 531 | int childLeft = 0; |
| 532 | |
| 533 | final int count = getChildCount(); |
| 534 | for (int i = 0; i < count; i++) { |
| 535 | final View child = getChildAt(i); |
| 536 | if (child.getVisibility() != View.GONE) { |
| 537 | final int childWidth = child.getMeasuredWidth(); |
| 538 | child.layout(childLeft, 0, childLeft + childWidth, child.getMeasuredHeight()); |
| 539 | childLeft += childWidth; |
| 540 | } |
| 541 | } |
| 542 | } |
| 543 | |
| 544 | @Override |
| 545 | public boolean requestChildRectangleOnScreen(View child, Rect rectangle, boolean immediate) { |
| 546 | int screen = indexOfChild(child); |
| 547 | if (screen != mCurrentScreen || !mScroller.isFinished()) { |
| 548 | if (!mLauncher.isWorkspaceLocked()) { |
| 549 | snapToScreen(screen); |
| 550 | } |
| 551 | return true; |
| 552 | } |
| 553 | return false; |
| 554 | } |
| 555 | |
| 556 | @Override |
| 557 | protected boolean onRequestFocusInDescendants(int direction, Rect previouslyFocusedRect) { |
| 558 | if (mLauncher.isDrawerDown()) { |
| 559 | final Folder openFolder = getOpenFolder(); |
| 560 | if (openFolder != null) { |
| 561 | return openFolder.requestFocus(direction, previouslyFocusedRect); |
| 562 | } else { |
| 563 | int focusableScreen; |
| 564 | if (mNextScreen != INVALID_SCREEN) { |
| 565 | focusableScreen = mNextScreen; |
| 566 | } else { |
| 567 | focusableScreen = mCurrentScreen; |
| 568 | } |
| 569 | getChildAt(focusableScreen).requestFocus(direction, previouslyFocusedRect); |
| 570 | } |
| 571 | } |
| 572 | return false; |
| 573 | } |
| 574 | |
| 575 | @Override |
| 576 | public boolean dispatchUnhandledMove(View focused, int direction) { |
| 577 | if (direction == View.FOCUS_LEFT) { |
| 578 | if (getCurrentScreen() > 0) { |
| 579 | snapToScreen(getCurrentScreen() - 1); |
| 580 | return true; |
| 581 | } |
| 582 | } else if (direction == View.FOCUS_RIGHT) { |
| 583 | if (getCurrentScreen() < getChildCount() - 1) { |
| 584 | snapToScreen(getCurrentScreen() + 1); |
| 585 | return true; |
| 586 | } |
| 587 | } |
| 588 | return super.dispatchUnhandledMove(focused, direction); |
| 589 | } |
| 590 | |
| 591 | @Override |
| 592 | public void addFocusables(ArrayList<View> views, int direction) { |
| 593 | if (mLauncher.isDrawerDown()) { |
| 594 | final Folder openFolder = getOpenFolder(); |
| 595 | if (openFolder == null) { |
| 596 | getChildAt(mCurrentScreen).addFocusables(views, direction); |
| 597 | if (direction == View.FOCUS_LEFT) { |
| 598 | if (mCurrentScreen > 0) { |
| 599 | getChildAt(mCurrentScreen - 1).addFocusables(views, direction); |
| 600 | } |
| 601 | } else if (direction == View.FOCUS_RIGHT){ |
| 602 | if (mCurrentScreen < getChildCount() - 1) { |
| 603 | getChildAt(mCurrentScreen + 1).addFocusables(views, direction); |
| 604 | } |
| 605 | } |
| 606 | } else { |
| 607 | openFolder.addFocusables(views, direction); |
| 608 | } |
| 609 | } |
| 610 | } |
| 611 | |
| 612 | @Override |
| 613 | public boolean onInterceptTouchEvent(MotionEvent ev) { |
| 614 | if (mLocked || !mLauncher.isDrawerDown()) { |
| 615 | return true; |
| 616 | } |
| 617 | |
| 618 | /* |
| 619 | * This method JUST determines whether we want to intercept the motion. |
| 620 | * If we return true, onTouchEvent will be called and we do the actual |
| 621 | * scrolling there. |
| 622 | */ |
| 623 | |
| 624 | /* |
| 625 | * Shortcut the most recurring case: the user is in the dragging |
| 626 | * state and he is moving his finger. We want to intercept this |
| 627 | * motion. |
| 628 | */ |
| 629 | final int action = ev.getAction(); |
| 630 | if ((action == MotionEvent.ACTION_MOVE) && (mTouchState != TOUCH_STATE_REST)) { |
| 631 | return true; |
| 632 | } |
| 633 | |
| 634 | final float x = ev.getX(); |
| 635 | final float y = ev.getY(); |
| 636 | |
| 637 | switch (action) { |
| 638 | case MotionEvent.ACTION_MOVE: |
| 639 | /* |
| 640 | * mIsBeingDragged == false, otherwise the shortcut would have caught it. Check |
| 641 | * whether the user has moved far enough from his original down touch. |
| 642 | */ |
| 643 | |
| 644 | /* |
| 645 | * Locally do absolute value. mLastMotionX is set to the y value |
| 646 | * of the down event. |
| 647 | */ |
| 648 | final int xDiff = (int) Math.abs(x - mLastMotionX); |
| 649 | final int yDiff = (int) Math.abs(y - mLastMotionY); |
| 650 | |
| 651 | final int touchSlop = mTouchSlop; |
| 652 | boolean xMoved = xDiff > touchSlop; |
| 653 | boolean yMoved = yDiff > touchSlop; |
| 654 | |
| 655 | if (xMoved || yMoved) { |
| 656 | |
| 657 | if (xMoved) { |
| 658 | // Scroll if the user moved far enough along the X axis |
| 659 | mTouchState = TOUCH_STATE_SCROLLING; |
| 660 | enableChildrenCache(); |
| 661 | } |
| 662 | // Either way, cancel any pending longpress |
| 663 | if (mAllowLongPress) { |
| 664 | mAllowLongPress = false; |
| 665 | // Try canceling the long press. It could also have been scheduled |
| 666 | // by a distant descendant, so use the mAllowLongPress flag to block |
| 667 | // everything |
| 668 | final View currentScreen = getChildAt(mCurrentScreen); |
| 669 | currentScreen.cancelLongPress(); |
| 670 | } |
| 671 | } |
| 672 | break; |
| 673 | |
| 674 | case MotionEvent.ACTION_DOWN: |
| 675 | // Remember location of down touch |
| 676 | mLastMotionX = x; |
| 677 | mLastMotionY = y; |
| 678 | mAllowLongPress = true; |
| 679 | |
| 680 | /* |
| 681 | * If being flinged and user touches the screen, initiate drag; |
| 682 | * otherwise don't. mScroller.isFinished should be false when |
| 683 | * being flinged. |
| 684 | */ |
| 685 | mTouchState = mScroller.isFinished() ? TOUCH_STATE_REST : TOUCH_STATE_SCROLLING; |
| 686 | break; |
| 687 | |
| 688 | case MotionEvent.ACTION_CANCEL: |
| 689 | case MotionEvent.ACTION_UP: |
| 690 | // Release the drag |
| 691 | clearChildrenCache(); |
| 692 | mTouchState = TOUCH_STATE_REST; |
| 693 | mAllowLongPress = false; |
| 694 | break; |
| 695 | } |
| 696 | |
| 697 | /* |
| 698 | * The only time we want to intercept motion events is if we are in the |
| 699 | * drag mode. |
| 700 | */ |
| 701 | return mTouchState != TOUCH_STATE_REST; |
| 702 | } |
| 703 | |
| 704 | void enableChildrenCache() { |
| 705 | final int count = getChildCount(); |
| 706 | for (int i = 0; i < count; i++) { |
| 707 | final CellLayout layout = (CellLayout) getChildAt(i); |
| 708 | layout.setChildrenDrawnWithCacheEnabled(true); |
| 709 | layout.setChildrenDrawingCacheEnabled(true); |
| 710 | } |
| 711 | } |
| 712 | |
| 713 | void clearChildrenCache() { |
| 714 | final int count = getChildCount(); |
| 715 | for (int i = 0; i < count; i++) { |
| 716 | final CellLayout layout = (CellLayout) getChildAt(i); |
| 717 | layout.setChildrenDrawnWithCacheEnabled(false); |
| 718 | } |
| 719 | } |
| 720 | |
| 721 | @Override |
| 722 | public boolean onTouchEvent(MotionEvent ev) { |
| 723 | if (mLocked || !mLauncher.isDrawerDown()) { |
| 724 | return true; |
| 725 | } |
| 726 | |
| 727 | if (mVelocityTracker == null) { |
| 728 | mVelocityTracker = VelocityTracker.obtain(); |
| 729 | } |
| 730 | mVelocityTracker.addMovement(ev); |
| 731 | |
| 732 | final int action = ev.getAction(); |
| 733 | final float x = ev.getX(); |
| 734 | |
| 735 | switch (action) { |
| 736 | case MotionEvent.ACTION_DOWN: |
| 737 | /* |
| 738 | * If being flinged and user touches, stop the fling. isFinished |
| 739 | * will be false if being flinged. |
| 740 | */ |
| 741 | if (!mScroller.isFinished()) { |
| 742 | mScroller.abortAnimation(); |
| 743 | } |
| 744 | |
| 745 | // Remember where the motion event started |
| 746 | mLastMotionX = x; |
| 747 | break; |
| 748 | case MotionEvent.ACTION_MOVE: |
| 749 | if (mTouchState == TOUCH_STATE_SCROLLING) { |
| 750 | // Scroll to follow the motion event |
| 751 | final int deltaX = (int) (mLastMotionX - x); |
| 752 | mLastMotionX = x; |
| 753 | |
| 754 | if (deltaX < 0) { |
| 755 | if (mScrollX > 0) { |
| 756 | scrollBy(Math.max(-mScrollX, deltaX), 0); |
| 757 | } |
| 758 | } else if (deltaX > 0) { |
| 759 | final int availableToScroll = getChildAt(getChildCount() - 1).getRight() - |
| 760 | mScrollX - getWidth(); |
| 761 | if (availableToScroll > 0) { |
| 762 | scrollBy(Math.min(availableToScroll, deltaX), 0); |
| 763 | } |
| 764 | } |
| 765 | } |
| 766 | break; |
| 767 | case MotionEvent.ACTION_UP: |
| 768 | if (mTouchState == TOUCH_STATE_SCROLLING) { |
| 769 | final VelocityTracker velocityTracker = mVelocityTracker; |
| 770 | velocityTracker.computeCurrentVelocity(1000); |
| 771 | int velocityX = (int) velocityTracker.getXVelocity(); |
| 772 | |
| 773 | if (velocityX > SNAP_VELOCITY && mCurrentScreen > 0) { |
| 774 | // Fling hard enough to move left |
| 775 | snapToScreen(mCurrentScreen - 1); |
| 776 | } else if (velocityX < -SNAP_VELOCITY && mCurrentScreen < getChildCount() - 1) { |
| 777 | // Fling hard enough to move right |
| 778 | snapToScreen(mCurrentScreen + 1); |
| 779 | } else { |
| 780 | snapToDestination(); |
| 781 | } |
| 782 | |
| 783 | if (mVelocityTracker != null) { |
| 784 | mVelocityTracker.recycle(); |
| 785 | mVelocityTracker = null; |
| 786 | } |
| 787 | } |
| 788 | mTouchState = TOUCH_STATE_REST; |
| 789 | break; |
| 790 | case MotionEvent.ACTION_CANCEL: |
| 791 | mTouchState = TOUCH_STATE_REST; |
| 792 | } |
| 793 | |
| 794 | return true; |
| 795 | } |
| 796 | |
| 797 | private void snapToDestination() { |
| 798 | final int screenWidth = getWidth(); |
| 799 | final int whichScreen = (mScrollX + (screenWidth / 2)) / screenWidth; |
| 800 | |
| 801 | snapToScreen(whichScreen); |
| 802 | } |
| 803 | |
| 804 | void snapToScreen(int whichScreen) { |
| 805 | enableChildrenCache(); |
| 806 | |
| 807 | whichScreen = Math.max(0, Math.min(whichScreen, getChildCount() - 1)); |
| 808 | boolean changingScreens = whichScreen != mCurrentScreen; |
| 809 | |
| 810 | mNextScreen = whichScreen; |
| 811 | |
| 812 | View focusedChild = getFocusedChild(); |
| 813 | if (focusedChild != null && changingScreens && focusedChild == getChildAt(mCurrentScreen)) { |
| 814 | focusedChild.clearFocus(); |
| 815 | } |
| 816 | |
| 817 | final int newX = whichScreen * getWidth(); |
| 818 | final int delta = newX - mScrollX; |
| 819 | mScroller.startScroll(mScrollX, 0, delta, 0, Math.abs(delta) * 2); |
| 820 | invalidate(); |
| 821 | } |
| 822 | |
| 823 | void startDrag(CellLayout.CellInfo cellInfo) { |
| 824 | View child = cellInfo.cell; |
| 825 | |
| 826 | // Make sure the drag was started by a long press as opposed to a long click. |
| 827 | // Note that Search takes focus when clicked rather than entering touch mode |
| 828 | if (!child.isInTouchMode() && !(child instanceof Search)) { |
| 829 | return; |
| 830 | } |
| 831 | |
| 832 | mDragInfo = cellInfo; |
| 833 | mDragInfo.screen = mCurrentScreen; |
| 834 | |
| 835 | CellLayout current = ((CellLayout) getChildAt(mCurrentScreen)); |
| 836 | |
| 837 | current.onDragChild(child); |
| 838 | mDragger.startDrag(child, this, child.getTag(), DragController.DRAG_ACTION_MOVE); |
| 839 | invalidate(); |
| 840 | } |
| 841 | |
| 842 | @Override |
| 843 | protected Parcelable onSaveInstanceState() { |
| 844 | final SavedState state = new SavedState(super.onSaveInstanceState()); |
| 845 | state.currentScreen = mCurrentScreen; |
| 846 | return state; |
| 847 | } |
| 848 | |
| 849 | @Override |
| 850 | protected void onRestoreInstanceState(Parcelable state) { |
| 851 | SavedState savedState = (SavedState) state; |
| 852 | super.onRestoreInstanceState(savedState.getSuperState()); |
| 853 | if (savedState.currentScreen != -1) { |
| 854 | mCurrentScreen = savedState.currentScreen; |
| 855 | Launcher.setScreen(mCurrentScreen); |
| 856 | } |
| 857 | } |
| 858 | |
| 859 | void addApplicationShortcut(ApplicationInfo info, CellLayout.CellInfo cellInfo) { |
| 860 | addApplicationShortcut(info, cellInfo, false); |
| 861 | } |
| 862 | |
| 863 | void addApplicationShortcut(ApplicationInfo info, CellLayout.CellInfo cellInfo, |
| 864 | boolean insertAtFirst) { |
| 865 | final CellLayout layout = (CellLayout) getChildAt(cellInfo.screen); |
| 866 | final int[] result = new int[2]; |
| 867 | |
| 868 | layout.cellToPoint(cellInfo.cellX, cellInfo.cellY, result); |
| 869 | onDropExternal(result[0], result[1], info, layout, insertAtFirst); |
| 870 | } |
| 871 | |
| 872 | public void onDrop(DragSource source, int x, int y, int xOffset, int yOffset, Object dragInfo) { |
| 873 | final CellLayout cellLayout = (CellLayout) getChildAt(mCurrentScreen); |
| 874 | if (source != this) { |
| 875 | onDropExternal(x - xOffset, y - yOffset, dragInfo, cellLayout); |
| 876 | } else { |
| 877 | // Move internally |
| 878 | if (mDragInfo != null) { |
| 879 | final View cell = mDragInfo.cell; |
| 880 | if (mCurrentScreen != mDragInfo.screen) { |
| 881 | final CellLayout originalCellLayout = (CellLayout) getChildAt(mDragInfo.screen); |
| 882 | originalCellLayout.removeView(cell); |
| 883 | cellLayout.addView(cell); |
| 884 | } |
| 885 | cellLayout.onDropChild(cell, x - xOffset, y - yOffset); |
| 886 | |
| 887 | final ItemInfo info = (ItemInfo)cell.getTag(); |
| 888 | CellLayout.LayoutParams lp = (CellLayout.LayoutParams) cell.getLayoutParams(); |
| 889 | LauncherModel.moveItemInDatabase(mLauncher, info, |
| 890 | LauncherSettings.Favorites.CONTAINER_DESKTOP, mCurrentScreen, lp.cellX, lp.cellY); |
| 891 | } |
| 892 | } |
| 893 | } |
| 894 | |
| 895 | public void onDragEnter(DragSource source, int x, int y, int xOffset, int yOffset, |
| 896 | Object dragInfo) { |
| 897 | } |
| 898 | |
| 899 | public void onDragOver(DragSource source, int x, int y, int xOffset, int yOffset, |
| 900 | Object dragInfo) { |
| 901 | } |
| 902 | |
| 903 | public void onDragExit(DragSource source, int x, int y, int xOffset, int yOffset, |
| 904 | Object dragInfo) { |
| 905 | } |
| 906 | |
| 907 | private void onDropExternal(int x, int y, Object dragInfo, CellLayout cellLayout) { |
| 908 | onDropExternal(x, y, dragInfo, cellLayout, false); |
| 909 | } |
| 910 | |
| 911 | private void onDropExternal(int x, int y, Object dragInfo, CellLayout cellLayout, |
| 912 | boolean insertAtFirst) { |
| 913 | // Drag from somewhere else |
| 914 | ItemInfo info = (ItemInfo) dragInfo; |
| 915 | |
| 916 | View view; |
| 917 | |
| 918 | switch (info.itemType) { |
| 919 | case LauncherSettings.Favorites.ITEM_TYPE_APPLICATION: |
| 920 | case LauncherSettings.Favorites.ITEM_TYPE_SHORTCUT: |
| 921 | if (info.container == NO_ID) { |
| 922 | // Came from all apps -- make a copy |
| 923 | info = new ApplicationInfo((ApplicationInfo) info); |
| 924 | } |
| 925 | view = mLauncher.createShortcut(R.layout.application, cellLayout, |
| 926 | (ApplicationInfo) info); |
| 927 | break; |
| 928 | case LauncherSettings.Favorites.ITEM_TYPE_USER_FOLDER: |
| 929 | view = FolderIcon.fromXml(R.layout.folder_icon, mLauncher, |
| 930 | (ViewGroup) getChildAt(mCurrentScreen), ((UserFolderInfo) info)); |
| 931 | break; |
| 932 | default: |
| 933 | throw new IllegalStateException("Unknown item type: " + info.itemType); |
| 934 | } |
| 935 | |
| 936 | cellLayout.addView(view, insertAtFirst ? 0 : -1); |
| 937 | view.setOnLongClickListener(mLongClickListener); |
| 938 | cellLayout.onDropChild(view, x, y); |
| 939 | CellLayout.LayoutParams lp = (CellLayout.LayoutParams) view.getLayoutParams(); |
| 940 | |
| 941 | final LauncherModel model = Launcher.getModel(); |
| 942 | model.addDesktopItem(info); |
| 943 | LauncherModel.addOrMoveItemInDatabase(mLauncher, info, |
| 944 | LauncherSettings.Favorites.CONTAINER_DESKTOP, mCurrentScreen, lp.cellX, lp.cellY); |
| 945 | } |
| 946 | |
| 947 | public boolean acceptDrop(DragSource source, int x, int y, int xOffset, int yOffset, |
| 948 | Object dragInfo) { |
| 949 | |
| 950 | final CellLayout.CellInfo cellInfo = mDragInfo; |
| 951 | int cellHSpan = cellInfo == null ? 1 : cellInfo.spanX; |
| 952 | int cellVSpan = cellInfo == null ? 1 : cellInfo.spanY; |
| 953 | |
| 954 | return ((CellLayout) getChildAt(mCurrentScreen)).acceptChildDrop(x - xOffset, y - yOffset, |
| 955 | cellHSpan, cellVSpan, cellInfo == null ? null : cellInfo.cell); |
| 956 | } |
| 957 | |
| 958 | void setLauncher(Launcher launcher) { |
| 959 | mLauncher = launcher; |
| 960 | } |
| 961 | |
| 962 | public void setDragger(DragController dragger) { |
| 963 | mDragger = dragger; |
| 964 | } |
| 965 | |
| 966 | public void onDropCompleted(View target, boolean success) { |
| 967 | if (success){ |
| 968 | if (target != this && mDragInfo != null) { |
| 969 | final CellLayout cellLayout = (CellLayout) getChildAt(mDragInfo.screen); |
| 970 | cellLayout.removeView(mDragInfo.cell); |
| 971 | final Object tag = mDragInfo.cell.getTag(); |
| 972 | Launcher.getModel().removeDesktopItem((ItemInfo) tag); |
| 973 | } |
| 974 | } else { |
| 975 | if (mDragInfo != null) { |
| 976 | final CellLayout cellLayout = (CellLayout) getChildAt(mDragInfo.screen); |
| 977 | cellLayout.onDropAborted(mDragInfo.cell); |
| 978 | } |
| 979 | } |
| 980 | |
| 981 | mDragInfo = null; |
| 982 | } |
| 983 | |
| 984 | public void scrollLeft() { |
| 985 | if (mNextScreen == INVALID_SCREEN && mCurrentScreen > 0 && mScroller.isFinished()) { |
| 986 | snapToScreen(mCurrentScreen - 1); |
| 987 | } |
| 988 | } |
| 989 | |
| 990 | public void scrollRight() { |
| 991 | if (mNextScreen == INVALID_SCREEN && mCurrentScreen < getChildCount() -1 && |
| 992 | mScroller.isFinished()) { |
| 993 | snapToScreen(mCurrentScreen + 1); |
| 994 | } |
| 995 | } |
| 996 | |
| 997 | public int getScreenForView(View v) { |
| 998 | int result = -1; |
| 999 | if (v != null) { |
| 1000 | ViewParent vp = v.getParent(); |
| 1001 | int count = getChildCount(); |
| 1002 | for (int i = 0; i < count; i++) { |
| 1003 | if (vp == getChildAt(i)) { |
| 1004 | return i; |
| 1005 | } |
| 1006 | } |
| 1007 | } |
| 1008 | return result; |
| 1009 | } |
| 1010 | |
| 1011 | /** |
| 1012 | * Find a search widget on the given screen |
| 1013 | */ |
| 1014 | private Search findSearchWidget(CellLayout screen) { |
| 1015 | final int count = screen.getChildCount(); |
| 1016 | for (int i = 0; i < count; i++) { |
| 1017 | View v = screen.getChildAt(i); |
| 1018 | if (v instanceof Search) { |
| 1019 | return (Search) v; |
| 1020 | } |
| 1021 | } |
| 1022 | return null; |
| 1023 | } |
| 1024 | |
| 1025 | /** |
| 1026 | * Focuses on the search widget on the specified screen, |
| 1027 | * if there is one. Also clears the current search selection so we don't |
| 1028 | */ |
| 1029 | private boolean focusOnSearch(int screen) { |
| 1030 | CellLayout currentScreen = (CellLayout) getChildAt(screen); |
| 1031 | final Search searchWidget = findSearchWidget(currentScreen); |
| 1032 | if (searchWidget != null) { |
| 1033 | // This is necessary when focus on search is requested from the menu |
| 1034 | // If the workspace was not in touch mode before the menu is invoked |
| 1035 | // and the user clicks "Search" by touching the menu item, the following |
| 1036 | // happens: |
| 1037 | // |
| 1038 | // - We request focus from touch on the search widget |
| 1039 | // - The search widget gains focus |
| 1040 | // - The window focus comes back to Home's window |
| 1041 | // - The touch mode change is propagated to Home's window |
| 1042 | // - The search widget is not focusable in touch mode and ViewRoot |
| 1043 | // clears its focus |
| 1044 | // |
| 1045 | // Forcing focusable in touch mode ensures the search widget will |
| 1046 | // keep the focus no matter what happens. |
| 1047 | // |
| 1048 | // Note: the search input field disables focusable in touch mode |
| 1049 | // after the window gets the focus back, see SearchAutoCompleteTextView |
| 1050 | final SearchAutoCompleteTextView input = searchWidget.getSearchInputField(); |
| 1051 | input.setFocusableInTouchMode(true); |
| 1052 | input.showKeyboardOnNextFocus(); |
| 1053 | |
| 1054 | if (isInTouchMode()) { |
| 1055 | searchWidget.requestFocusFromTouch(); |
| 1056 | } else { |
| 1057 | searchWidget.requestFocus(); |
| 1058 | } |
| 1059 | searchWidget.clearQuery(); |
| 1060 | return true; |
| 1061 | } |
| 1062 | return false; |
| 1063 | } |
| 1064 | |
| 1065 | /** |
| 1066 | * Snap to the nearest screen with a search widget and give it focus |
| 1067 | * |
| 1068 | * @return True if a search widget was found |
| 1069 | */ |
| 1070 | public boolean snapToSearch() { |
| 1071 | // The screen we are searching |
| 1072 | int current = mCurrentScreen; |
| 1073 | |
| 1074 | // first position scanned so far |
| 1075 | int first = current; |
| 1076 | |
| 1077 | // last position scanned so far |
| 1078 | int last = current; |
| 1079 | |
| 1080 | // True if we should move down on the next iteration |
| 1081 | boolean next = false; |
| 1082 | |
| 1083 | // True when we have looked at the first item in the data |
| 1084 | boolean hitFirst; |
| 1085 | |
| 1086 | // True when we have looked at the last item in the data |
| 1087 | boolean hitLast; |
| 1088 | |
| 1089 | final int count = getChildCount(); |
| 1090 | |
| 1091 | while (true) { |
| 1092 | if (focusOnSearch(current)) { |
| 1093 | return true; |
| 1094 | } |
| 1095 | |
| 1096 | hitLast = last == count - 1; |
| 1097 | hitFirst = first == 0; |
| 1098 | |
| 1099 | if (hitLast && hitFirst) { |
| 1100 | // Looked at everything |
| 1101 | break; |
| 1102 | } |
| 1103 | |
| 1104 | if (hitFirst || (next && !hitLast)) { |
| 1105 | // Either we hit the top, or we are trying to move down |
| 1106 | last++; |
| 1107 | current = last; |
| 1108 | // Try going up next time |
| 1109 | next = false; |
| 1110 | } else { |
| 1111 | // Either we hit the bottom, or we are trying to move up |
| 1112 | first--; |
| 1113 | current = first; |
| 1114 | // Try going down next time |
| 1115 | next = true; |
| 1116 | } |
| 1117 | |
| 1118 | } |
| 1119 | return false; |
| 1120 | } |
| 1121 | |
| 1122 | public Folder getFolderForTag(Object tag) { |
| 1123 | int screenCount = getChildCount(); |
| 1124 | for (int screen = 0; screen < screenCount; screen++) { |
| 1125 | CellLayout currentScreen = ((CellLayout) getChildAt(screen)); |
| 1126 | int count = currentScreen.getChildCount(); |
| 1127 | for (int i = 0; i < count; i++) { |
| 1128 | View child = currentScreen.getChildAt(i); |
| 1129 | CellLayout.LayoutParams lp = (CellLayout.LayoutParams) child.getLayoutParams(); |
| 1130 | if (lp.cellHSpan == 4 && lp.cellVSpan == 4 && child instanceof Folder) { |
| 1131 | Folder f = (Folder) child; |
| 1132 | if (f.getInfo() == tag) { |
| 1133 | return f; |
| 1134 | } |
| 1135 | } |
| 1136 | } |
| 1137 | } |
| 1138 | return null; |
| 1139 | } |
| 1140 | |
| 1141 | public View getViewForTag(Object tag) { |
| 1142 | int screenCount = getChildCount(); |
| 1143 | for (int screen = 0; screen < screenCount; screen++) { |
| 1144 | CellLayout currentScreen = ((CellLayout) getChildAt(screen)); |
| 1145 | int count = currentScreen.getChildCount(); |
| 1146 | for (int i = 0; i < count; i++) { |
| 1147 | View child = currentScreen.getChildAt(i); |
| 1148 | if (child.getTag() == tag) { |
| 1149 | return child; |
| 1150 | } |
| 1151 | } |
| 1152 | } |
| 1153 | return null; |
| 1154 | } |
| 1155 | |
| 1156 | /** |
| 1157 | * Unlocks the SlidingDrawer so that touch events are processed. |
| 1158 | * |
| 1159 | * @see #lock() |
| 1160 | */ |
| 1161 | public void unlock() { |
| 1162 | mLocked = false; |
| 1163 | } |
| 1164 | |
| 1165 | /** |
| 1166 | * Locks the SlidingDrawer so that touch events are ignores. |
| 1167 | * |
| 1168 | * @see #unlock() |
| 1169 | */ |
| 1170 | public void lock() { |
| 1171 | mLocked = true; |
| 1172 | } |
| 1173 | |
| 1174 | /** |
| 1175 | * @return True is long presses are still allowed for the current touch |
| 1176 | */ |
| 1177 | public boolean allowLongPress() { |
| 1178 | return mAllowLongPress; |
| 1179 | } |
| 1180 | |
| 1181 | void removeShortcutsForPackage(String packageName) { |
| 1182 | final ArrayList<View> childrenToRemove = new ArrayList<View>(); |
| 1183 | final LauncherModel model = Launcher.getModel(); |
| 1184 | final int count = getChildCount(); |
| 1185 | for (int i = 0; i < count; i++) { |
| 1186 | final CellLayout layout = (CellLayout) getChildAt(i); |
| 1187 | int childCount = layout.getChildCount(); |
| 1188 | childrenToRemove.clear(); |
| 1189 | for (int j = 0; j < childCount; j++) { |
| 1190 | final View view = layout.getChildAt(j); |
| 1191 | Object tag = view.getTag(); |
| 1192 | if (tag instanceof ApplicationInfo) { |
| 1193 | ApplicationInfo info = (ApplicationInfo) tag; |
| 1194 | // We need to check for ACTION_MAIN otherwise getComponent() might |
| 1195 | // return null for some shortcuts (for instance, for shortcuts to |
| 1196 | // web pages.) |
| 1197 | final Intent intent = info.intent; |
| 1198 | final ComponentName name = intent.getComponent(); |
| 1199 | if (Intent.ACTION_MAIN.equals(intent.getAction()) && |
| 1200 | name != null && packageName.equals(name.getPackageName())) { |
| 1201 | model.removeDesktopItem(info); |
| 1202 | LauncherModel.deleteItemFromDatabase(mLauncher, info); |
| 1203 | childrenToRemove.add(view); |
| 1204 | } |
| 1205 | } |
| 1206 | } |
| 1207 | childCount = childrenToRemove.size(); |
| 1208 | for (int j = 0; j < childCount; j++) { |
| 1209 | layout.removeViewInLayout(childrenToRemove.get(j)); |
| 1210 | } |
| 1211 | if (childCount > 0) { |
| 1212 | layout.requestLayout(); |
| 1213 | layout.invalidate(); |
| 1214 | } |
| 1215 | } |
| 1216 | } |
| 1217 | |
| 1218 | // TODO: remove gadgets when gadgetmanager tells us they're gone |
| 1219 | // void removeGadgetsForProvider() { |
| 1220 | // } |
| 1221 | |
| 1222 | void moveToDefaultScreen() { |
| 1223 | snapToScreen(mDefaultScreen); |
| 1224 | getChildAt(mDefaultScreen).requestFocus(); |
| 1225 | } |
| 1226 | |
| 1227 | public static class SavedState extends BaseSavedState { |
| 1228 | int currentScreen = -1; |
| 1229 | |
| 1230 | SavedState(Parcelable superState) { |
| 1231 | super(superState); |
| 1232 | } |
| 1233 | |
| 1234 | private SavedState(Parcel in) { |
| 1235 | super(in); |
| 1236 | currentScreen = in.readInt(); |
| 1237 | } |
| 1238 | |
| 1239 | @Override |
| 1240 | public void writeToParcel(Parcel out, int flags) { |
| 1241 | super.writeToParcel(out, flags); |
| 1242 | out.writeInt(currentScreen); |
| 1243 | } |
| 1244 | |
| 1245 | public static final Parcelable.Creator<SavedState> CREATOR = |
| 1246 | new Parcelable.Creator<SavedState>() { |
| 1247 | public SavedState createFromParcel(Parcel in) { |
| 1248 | return new SavedState(in); |
| 1249 | } |
| 1250 | |
| 1251 | public SavedState[] newArray(int size) { |
| 1252 | return new SavedState[size]; |
| 1253 | } |
| 1254 | }; |
| 1255 | } |
| 1256 | } |