/* * Copyright (C) 2008 The Android Open Source Project * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ package com.android.launcher2; import com.android.launcher.R; import android.app.WallpaperManager; import android.appwidget.AppWidgetManager; import android.appwidget.AppWidgetProviderInfo; import android.content.ComponentName; import android.content.Context; import android.content.Intent; import android.content.pm.PackageManager; import android.content.pm.ProviderInfo; import android.content.res.TypedArray; import android.graphics.Canvas; import android.graphics.Paint; import android.graphics.Rect; import android.graphics.drawable.Drawable; import android.net.Uri; import android.os.IBinder; import android.os.Parcel; import android.os.Parcelable; import android.util.AttributeSet; import android.util.Log; import android.view.MotionEvent; import android.view.VelocityTracker; import android.view.View; import android.view.ViewConfiguration; import android.view.ViewGroup; import android.view.ViewParent; import android.view.animation.Animation; import android.view.animation.Animation.AnimationListener; import android.view.animation.Interpolator; import android.view.animation.RotateAnimation; import android.widget.Scroller; import android.widget.TextView; import android.widget.Toast; import java.util.ArrayList; import java.util.HashSet; /** * The workspace is a wide area with a wallpaper and a finite number of screens. * Each screen contains a number of icons, folders or widgets the user can * interact with. A workspace is meant to be used with a fixed width only. */ public class Workspace extends ViewGroup implements DropTarget, DragSource, DragScroller { @SuppressWarnings({"UnusedDeclaration"}) private static final String TAG = "Launcher.Workspace"; private static final int INVALID_SCREEN = -1; /** * The velocity at which a fling gesture will cause us to snap to the next * screen */ private static final int SNAP_VELOCITY = 600; private final WallpaperManager mWallpaperManager; private int mDefaultScreen; private boolean mFirstLayout = true; private int mCurrentScreen; private int mNextScreen = INVALID_SCREEN; private Scroller mScroller; private VelocityTracker mVelocityTracker; /** * CellInfo for the cell that is currently being dragged */ private CellLayout.CellInfo mDragInfo; /** * Target drop area calculated during last acceptDrop call. */ private int[] mTargetCell = null; /** * The CellLayout that is currently being dragged over */ private CellLayout mDragTargetLayout = null; private float mLastMotionX; private float mLastMotionY; private final static int TOUCH_STATE_REST = 0; private final static int TOUCH_STATE_SCROLLING = 1; private int mTouchState = TOUCH_STATE_REST; private OnTouchListener mInterceptTouchListener; private OnLongClickListener mLongClickListener; private Launcher mLauncher; private IconCache mIconCache; private DragController mDragController; /** * Cache of vacant cells, used during drag events and invalidated as needed. */ private CellLayout.CellInfo mVacantCache = null; private int[] mTempCell = new int[2]; private int[] mTempEstimate = new int[2]; private boolean mAllowLongPress = true; private int mTouchSlop; private int mMaximumVelocity; private static final int INVALID_POINTER = -1; private int mActivePointerId = INVALID_POINTER; private Drawable mPreviousIndicator; private Drawable mNextIndicator; private static final float NANOTIME_DIV = 1000000000.0f; private static final float SMOOTHING_SPEED = 0.75f; private static final float SMOOTHING_CONSTANT = (float) (0.016 / Math.log(SMOOTHING_SPEED)); private float mSmoothingTime; private float mTouchX; private WorkspaceOvershootInterpolator mScrollInterpolator; private static final float BASELINE_FLING_VELOCITY = 2500.f; private static final float FLING_VELOCITY_INFLUENCE = 0.4f; private Paint mDropIndicatorPaint; private static class WorkspaceOvershootInterpolator implements Interpolator { private static final float DEFAULT_TENSION = 1.3f; private float mTension; public WorkspaceOvershootInterpolator() { mTension = DEFAULT_TENSION; } public void setDistance(int distance) { mTension = distance > 0 ? DEFAULT_TENSION / distance : DEFAULT_TENSION; } public void disableSettle() { mTension = 0.f; } public float getInterpolation(float t) { // _o(t) = t * t * ((tension + 1) * t + tension) // o(t) = _o(t - 1) + 1 t -= 1.0f; return t * t * ((mTension + 1) * t + mTension) + 1.0f; } } /** * Used to inflate the Workspace from XML. * * @param context The application's context. * @param attrs The attribtues set containing the Workspace's customization values. */ public Workspace(Context context, AttributeSet attrs) { this(context, attrs, 0); } /** * Used to inflate the Workspace from XML. * * @param context The application's context. * @param attrs The attribtues set containing the Workspace's customization values. * @param defStyle Unused. */ public Workspace(Context context, AttributeSet attrs, int defStyle) { super(context, attrs, defStyle); mWallpaperManager = WallpaperManager.getInstance(context); TypedArray a = context.obtainStyledAttributes(attrs, R.styleable.Workspace, defStyle, 0); int canonicalDeviceWidth = a.getInt(R.styleable.Workspace_canonicalDeviceWidth, 4); int canonicalDeviceHeight = a.getInt(R.styleable.Workspace_canonicalDeviceHeight, 4); mDefaultScreen = a.getInt(R.styleable.Workspace_defaultScreen, 1); a.recycle(); LauncherModel.updateWorkspaceLayoutCells(canonicalDeviceWidth, canonicalDeviceHeight); setHapticFeedbackEnabled(false); initWorkspace(); } /** * Initializes various states for this workspace. */ private void initWorkspace() { Context context = getContext(); mScrollInterpolator = new WorkspaceOvershootInterpolator(); mScroller = new Scroller(context, mScrollInterpolator); mCurrentScreen = mDefaultScreen; Launcher.setScreen(mCurrentScreen); LauncherApplication app = (LauncherApplication)context.getApplicationContext(); mIconCache = app.getIconCache(); final ViewConfiguration configuration = ViewConfiguration.get(getContext()); mTouchSlop = configuration.getScaledTouchSlop(); mMaximumVelocity = configuration.getScaledMaximumFlingVelocity(); } @Override public void addView(View child, int index, LayoutParams params) { if (!(child instanceof CellLayout)) { throw new IllegalArgumentException("A Workspace can only have CellLayout children."); } super.addView(child, index, params); } @Override public void addView(View child) { if (!(child instanceof CellLayout)) { throw new IllegalArgumentException("A Workspace can only have CellLayout children."); } super.addView(child); } @Override public void addView(View child, int index) { if (!(child instanceof CellLayout)) { throw new IllegalArgumentException("A Workspace can only have CellLayout children."); } super.addView(child, index); } @Override public void addView(View child, int width, int height) { if (!(child instanceof CellLayout)) { throw new IllegalArgumentException("A Workspace can only have CellLayout children."); } super.addView(child, width, height); } @Override public void addView(View child, LayoutParams params) { if (!(child instanceof CellLayout)) { throw new IllegalArgumentException("A Workspace can only have CellLayout children."); } super.addView(child, params); } /** * @return The open folder on the current screen, or null if there is none */ Folder getOpenFolder() { CellLayout currentScreen = (CellLayout) getChildAt(mCurrentScreen); int count = currentScreen.getChildCount(); for (int i = 0; i < count; i++) { View child = currentScreen.getChildAt(i); if (child instanceof Folder) { Folder folder = (Folder) child; if (folder.getInfo().opened) return folder; } } return null; } ArrayList getOpenFolders() { final int screens = getChildCount(); ArrayList folders = new ArrayList(screens); for (int screen = 0; screen < screens; screen++) { CellLayout currentScreen = (CellLayout) getChildAt(screen); int count = currentScreen.getChildCount(); for (int i = 0; i < count; i++) { View child = currentScreen.getChildAt(i); CellLayout.LayoutParams lp = (CellLayout.LayoutParams) child .getLayoutParams(); if (child instanceof Folder) { Folder folder = (Folder) child; if (folder.getInfo().opened) folders.add(folder); break; } } } return folders; } boolean isDefaultScreenShowing() { return mCurrentScreen == mDefaultScreen; } /** * Returns the index of the currently displayed screen. * * @return The index of the currently displayed screen. */ int getCurrentScreen() { return mCurrentScreen; } /** * Sets the current screen. * * @param currentScreen */ void setCurrentScreen(int currentScreen) { if (!mScroller.isFinished()) mScroller.abortAnimation(); clearVacantCache(); mCurrentScreen = Math.max(0, Math.min(currentScreen, getChildCount() - 1)); if (mPreviousIndicator != null) { mPreviousIndicator.setLevel(mCurrentScreen); mNextIndicator.setLevel(mCurrentScreen); } scrollTo(mCurrentScreen * getWidth(), 0); updateWallpaperOffset(); invalidate(); } /** * Adds the specified child in the current screen. The position and dimension of * the child are defined by x, y, spanX and spanY. * * @param child The child to add in one of the workspace's screens. * @param x The X position of the child in the screen's grid. * @param y The Y position of the child in the screen's grid. * @param spanX The number of cells spanned horizontally by the child. * @param spanY The number of cells spanned vertically by the child. */ void addInCurrentScreen(View child, int x, int y, int spanX, int spanY) { addInScreen(child, mCurrentScreen, x, y, spanX, spanY, false); } /** * Adds the specified child in the current screen. The position and dimension of * the child are defined by x, y, spanX and spanY. * * @param child The child to add in one of the workspace's screens. * @param x The X position of the child in the screen's grid. * @param y The Y position of the child in the screen's grid. * @param spanX The number of cells spanned horizontally by the child. * @param spanY The number of cells spanned vertically by the child. * @param insert When true, the child is inserted at the beginning of the children list. */ void addInCurrentScreen(View child, int x, int y, int spanX, int spanY, boolean insert) { addInScreen(child, mCurrentScreen, x, y, spanX, spanY, insert); } /** * Adds the specified child in the specified screen. The position and dimension of * the child are defined by x, y, spanX and spanY. * * @param child The child to add in one of the workspace's screens. * @param screen The screen in which to add the child. * @param x The X position of the child in the screen's grid. * @param y The Y position of the child in the screen's grid. * @param spanX The number of cells spanned horizontally by the child. * @param spanY The number of cells spanned vertically by the child. */ void addInScreen(View child, int screen, int x, int y, int spanX, int spanY) { addInScreen(child, screen, x, y, spanX, spanY, false); } void addInFullScreen(View child, int screen) { addInScreen(child, screen, 0, 0, -1, -1); } public void rotateCurrentScreensChildren() { // close all the folders first final ArrayList openFolders = getOpenFolders(); WorkspaceOvershootInterpolator wi = new WorkspaceOvershootInterpolator(); RotateAnimation ra = new RotateAnimation((float) LauncherModel .getPreviousOrientationRelativeToCurrent(), 0, Animation.RELATIVE_TO_SELF, 0.5f, Animation.RELATIVE_TO_SELF, 0.5f); ra.setInterpolator(wi); CellLayout currentScreen = (CellLayout) getChildAt(mCurrentScreen); ra.setStartOffset(150); ra.setDuration(650 + (int) (Math.random() * 400) - 200); CellLayout.CellLayoutAnimationController animationController = new CellLayout.CellLayoutAnimationController( ra, 0.0f); currentScreen.setLayoutAnimation(animationController); currentScreen.setLayoutAnimationListener(new AnimationListener() { public void onAnimationStart(Animation animation) { // do nothing } public void onAnimationRepeat(Animation animation) { // do nothing } public void onAnimationEnd(Animation animation) { for (int j = 0; j < openFolders.size(); ++j) { Folder folder = openFolders.get(j); if (!folder.getInfo().opened) { mLauncher.openFolder(folder.getInfo()); } } } }); animationController.start(); for (int j = 0; j < openFolders.size(); ++j) { mLauncher.closeFolder(openFolders.get(j)); } } public void refreshWorkspaceChildren() { final int count = getChildCount(); View child; CellLayout.LayoutParams lp; int widthMeasureSpec = MeasureSpec.makeMeasureSpec(LauncherModel .getLocalDeviceWidth(), MeasureSpec.EXACTLY); int heightMeasureSpec = MeasureSpec.makeMeasureSpec(LauncherModel .getLocalDeviceHeight(), MeasureSpec.EXACTLY); clearVacantCache(); for (int i = 0; i < count; i++) { final CellLayout layout = (CellLayout) getChildAt(i); int numChildren = layout.getChildCount(); // save reference to all current children for (int j = 0; j < numChildren; j++) { child = layout.getChildAt(j); lp = (CellLayout.LayoutParams) child.getLayoutParams(); LauncherModelOrientationHelper.Coordinates localCoord = LauncherModel .getLocalCoordinatesFromPreviousLocalCoordinates(lp); lp.cellX = localCoord.x; lp.cellY = localCoord.y; } layout.measure(widthMeasureSpec, heightMeasureSpec); } } /** * Adds the specified child in the specified screen. The position and dimension of * the child are defined by x, y, spanX and spanY. * * @param child The child to add in one of the workspace's screens. * @param screen The screen in which to add the child. * @param x The X position of the child in the screen's grid. * @param y The Y position of the child in the screen's grid. * @param spanX The number of cells spanned horizontally by the child. * @param spanY The number of cells spanned vertically by the child. * @param insert When true, the child is inserted at the beginning of the children list. */ void addInScreen(View child, int screen, int x, int y, int spanX, int spanY, boolean insert) { if (screen < 0 || screen >= getChildCount()) { Log.e(TAG, "The screen must be >= 0 and < " + getChildCount() + " (was " + screen + "); skipping child"); return; } clearVacantCache(); final CellLayout group = (CellLayout) getChildAt(screen); CellLayout.LayoutParams lp = (CellLayout.LayoutParams) child.getLayoutParams(); if (lp == null) { lp = new CellLayout.LayoutParams(x, y, spanX, spanY); } else { lp.cellX = x; lp.cellY = y; lp.cellHSpan = spanX; lp.cellVSpan = spanY; } // Get the canonical child id to uniquely represent this view in this screen int childId = LauncherModel.getCanonicalCellLayoutChildId(child.getId(), screen, x, y, spanX, spanY); if (!group.addViewToCellLayout(child, insert ? 0 : -1, childId, lp)) { // TODO: This branch occurs when the workspace is adding views // outside of the defined grid // maybe we should be deleting these items from the LauncherModel? Log.w(TAG, "Failed to add to item at (" + lp.cellX + "," + lp.cellY + ") to CellLayout"); } if (!(child instanceof Folder)) { child.setHapticFeedbackEnabled(false); child.setOnLongClickListener(mLongClickListener); } if (child instanceof DropTarget) { mDragController.addDropTarget((DropTarget) child); } } CellLayout.CellInfo findAllVacantCells(boolean[] occupied) { CellLayout group = (CellLayout) getChildAt(mCurrentScreen); if (group != null) { return group.findAllVacantCells(occupied, null); } return null; } private void clearVacantCache() { if (mVacantCache != null) { mVacantCache.clearVacantCells(); mVacantCache = null; } } public void setOnInterceptTouchListener(View.OnTouchListener listener) { mInterceptTouchListener = listener; } /** * Registers the specified listener on each screen contained in this workspace. * * @param l The listener used to respond to long clicks. */ @Override public void setOnLongClickListener(OnLongClickListener l) { mLongClickListener = l; final int count = getChildCount(); for (int i = 0; i < count; i++) { getChildAt(i).setOnLongClickListener(l); } } private void updateWallpaperOffset() { updateWallpaperOffset(getChildAt(getChildCount() - 1).getRight() - (mRight - mLeft)); } private void updateWallpaperOffset(int scrollRange) { IBinder token = getWindowToken(); if (token != null) { mWallpaperManager.setWallpaperOffsetSteps(1.0f / (getChildCount() - 1), 0 ); mWallpaperManager.setWallpaperOffsets(getWindowToken(), Math.max(0.f, Math.min(mScrollX/(float)scrollRange, 1.f)), 0); } } @Override public void scrollTo(int x, int y) { super.scrollTo(x, y); mTouchX = x; mSmoothingTime = System.nanoTime() / NANOTIME_DIV; } @Override public void computeScroll() { if (mScroller.computeScrollOffset()) { mTouchX = mScrollX = mScroller.getCurrX(); mSmoothingTime = System.nanoTime() / NANOTIME_DIV; mScrollY = mScroller.getCurrY(); updateWallpaperOffset(); postInvalidate(); } else if (mNextScreen != INVALID_SCREEN) { mCurrentScreen = Math.max(0, Math.min(mNextScreen, getChildCount() - 1)); if (mPreviousIndicator != null) { mPreviousIndicator.setLevel(mCurrentScreen); mNextIndicator.setLevel(mCurrentScreen); } Launcher.setScreen(mCurrentScreen); mNextScreen = INVALID_SCREEN; clearChildrenCache(); } else if (mTouchState == TOUCH_STATE_SCROLLING) { final float now = System.nanoTime() / NANOTIME_DIV; final float e = (float) Math.exp((now - mSmoothingTime) / SMOOTHING_CONSTANT); final float dx = mTouchX - mScrollX; mScrollX += dx * e; mSmoothingTime = now; // Keep generating points as long as we're more than 1px away from the target if (dx > 1.f || dx < -1.f) { updateWallpaperOffset(); postInvalidate(); } } } @Override protected void dispatchDraw(Canvas canvas) { boolean restore = false; int restoreCount = 0; // ViewGroup.dispatchDraw() supports many features we don't need: // clip to padding, layout animation, animation listener, disappearing // children, etc. The following implementation attempts to fast-track // the drawing dispatch by drawing only what we know needs to be drawn. boolean fastDraw = mTouchState != TOUCH_STATE_SCROLLING && mNextScreen == INVALID_SCREEN; // If we are not scrolling or flinging, draw only the current screen if (fastDraw) { drawChild(canvas, getChildAt(mCurrentScreen), getDrawingTime()); } else { final long drawingTime = getDrawingTime(); final float scrollPos = (float) mScrollX / getWidth(); final int leftScreen = (int) scrollPos; final int rightScreen = leftScreen + 1; if (leftScreen >= 0) { drawChild(canvas, getChildAt(leftScreen), drawingTime); } if (scrollPos != leftScreen && rightScreen < getChildCount()) { drawChild(canvas, getChildAt(rightScreen), drawingTime); } } if (restore) { canvas.restoreToCount(restoreCount); } } protected void onAttachedToWindow() { super.onAttachedToWindow(); computeScroll(); mDragController.setWindowToken(getWindowToken()); } @Override protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { super.onMeasure(widthMeasureSpec, heightMeasureSpec); final int width = MeasureSpec.getSize(widthMeasureSpec); final int widthMode = MeasureSpec.getMode(widthMeasureSpec); if (widthMode != MeasureSpec.EXACTLY) { throw new IllegalStateException("Workspace can only be used in EXACTLY mode."); } final int heightMode = MeasureSpec.getMode(heightMeasureSpec); if (heightMode != MeasureSpec.EXACTLY) { throw new IllegalStateException("Workspace can only be used in EXACTLY mode."); } // The children are given the same width and height as the workspace final int count = getChildCount(); for (int i = 0; i < count; i++) { getChildAt(i).measure(widthMeasureSpec, heightMeasureSpec); } if (mFirstLayout) { setHorizontalScrollBarEnabled(false); scrollTo(mCurrentScreen * width, 0); setHorizontalScrollBarEnabled(true); updateWallpaperOffset(width * (getChildCount() - 1)); mFirstLayout = false; } } @Override protected void onLayout(boolean changed, int left, int top, int right, int bottom) { int childLeft = 0; final int count = getChildCount(); for (int i = 0; i < count; i++) { final View child = getChildAt(i); if (child.getVisibility() != View.GONE) { final int childWidth = child.getMeasuredWidth(); child.layout(childLeft, 0, childLeft + childWidth, child.getMeasuredHeight()); childLeft += childWidth; } } if (LauncherApplication.isInPlaceRotationEnabled()) { // When the device is rotated, the scroll position of the current screen // needs to be refreshed setCurrentScreen(getCurrentScreen()); } } @Override public boolean requestChildRectangleOnScreen(View child, Rect rectangle, boolean immediate) { int screen = indexOfChild(child); if (screen != mCurrentScreen || !mScroller.isFinished()) { if (!mLauncher.isWorkspaceLocked()) { snapToScreen(screen); } return true; } return false; } @Override protected boolean onRequestFocusInDescendants(int direction, Rect previouslyFocusedRect) { if (!mLauncher.isAllAppsVisible()) { final Folder openFolder = getOpenFolder(); if (openFolder != null) { return openFolder.requestFocus(direction, previouslyFocusedRect); } else { int focusableScreen; if (mNextScreen != INVALID_SCREEN) { focusableScreen = mNextScreen; } else { focusableScreen = mCurrentScreen; } getChildAt(focusableScreen).requestFocus(direction, previouslyFocusedRect); } } return false; } @Override public boolean dispatchUnhandledMove(View focused, int direction) { if (direction == View.FOCUS_LEFT) { if (getCurrentScreen() > 0) { snapToScreen(getCurrentScreen() - 1); return true; } } else if (direction == View.FOCUS_RIGHT) { if (getCurrentScreen() < getChildCount() - 1) { snapToScreen(getCurrentScreen() + 1); return true; } } return super.dispatchUnhandledMove(focused, direction); } @Override public void addFocusables(ArrayList views, int direction, int focusableMode) { if (!mLauncher.isAllAppsVisible()) { final Folder openFolder = getOpenFolder(); if (openFolder == null) { getChildAt(mCurrentScreen).addFocusables(views, direction); if (direction == View.FOCUS_LEFT) { if (mCurrentScreen > 0) { getChildAt(mCurrentScreen - 1).addFocusables(views, direction); } } else if (direction == View.FOCUS_RIGHT) { if (mCurrentScreen < getChildCount() - 1) { getChildAt(mCurrentScreen + 1).addFocusables(views, direction); } } } else { openFolder.addFocusables(views, direction); } } } @Override public boolean dispatchTouchEvent(MotionEvent ev) { if (ev.getAction() == MotionEvent.ACTION_DOWN) { if (mLauncher.isWorkspaceLocked() || mLauncher.isAllAppsVisible()) { return false; } } return super.dispatchTouchEvent(ev); } @Override public boolean onInterceptTouchEvent(MotionEvent ev) { if (mInterceptTouchListener != null && mInterceptTouchListener.onTouch(this, ev)) { return true; } final boolean workspaceLocked = mLauncher.isWorkspaceLocked(); final boolean allAppsVisible = mLauncher.isAllAppsVisible(); if (workspaceLocked || allAppsVisible) { return false; // We don't want the events. Let them fall through to the all apps view. } /* * This method JUST determines whether we want to intercept the motion. * If we return true, onTouchEvent will be called and we do the actual * scrolling there. */ /* * Shortcut the most recurring case: the user is in the dragging * state and he is moving his finger. We want to intercept this * motion. */ final int action = ev.getAction(); if ((action == MotionEvent.ACTION_MOVE) && (mTouchState != TOUCH_STATE_REST)) { return true; } if (mVelocityTracker == null) { mVelocityTracker = VelocityTracker.obtain(); } mVelocityTracker.addMovement(ev); switch (action & MotionEvent.ACTION_MASK) { case MotionEvent.ACTION_MOVE: { /* * mIsBeingDragged == false, otherwise the shortcut would have caught it. Check * whether the user has moved far enough from his original down touch. */ /* * Locally do absolute value. mLastMotionX is set to the y value * of the down event. */ final int pointerIndex = ev.findPointerIndex(mActivePointerId); final float x = ev.getX(pointerIndex); final float y = ev.getY(pointerIndex); final int xDiff = (int) Math.abs(x - mLastMotionX); final int yDiff = (int) Math.abs(y - mLastMotionY); final int touchSlop = mTouchSlop; boolean xMoved = xDiff > touchSlop; boolean yMoved = yDiff > touchSlop; if (xMoved || yMoved) { if (xMoved) { // Scroll if the user moved far enough along the X axis mTouchState = TOUCH_STATE_SCROLLING; mLastMotionX = x; mTouchX = mScrollX; mSmoothingTime = System.nanoTime() / NANOTIME_DIV; enableChildrenCache(mCurrentScreen - 1, mCurrentScreen + 1); } // Either way, cancel any pending longpress if (mAllowLongPress) { mAllowLongPress = false; // Try canceling the long press. It could also have been scheduled // by a distant descendant, so use the mAllowLongPress flag to block // everything final View currentScreen = getChildAt(mCurrentScreen); currentScreen.cancelLongPress(); } } break; } case MotionEvent.ACTION_DOWN: { final float x = ev.getX(); final float y = ev.getY(); // Remember location of down touch mLastMotionX = x; mLastMotionY = y; mActivePointerId = ev.getPointerId(0); mAllowLongPress = true; /* * If being flinged and user touches the screen, initiate drag; * otherwise don't. mScroller.isFinished should be false when * being flinged. */ mTouchState = mScroller.isFinished() ? TOUCH_STATE_REST : TOUCH_STATE_SCROLLING; break; } case MotionEvent.ACTION_CANCEL: case MotionEvent.ACTION_UP: if (mTouchState != TOUCH_STATE_SCROLLING) { final CellLayout currentScreen = (CellLayout)getChildAt(mCurrentScreen); if (!currentScreen.lastDownOnOccupiedCell()) { getLocationOnScreen(mTempCell); // Send a tap to the wallpaper if the last down was on empty space final int pointerIndex = ev.findPointerIndex(mActivePointerId); mWallpaperManager.sendWallpaperCommand(getWindowToken(), "android.wallpaper.tap", mTempCell[0] + (int) ev.getX(pointerIndex), mTempCell[1] + (int) ev.getY(pointerIndex), 0, null); } } // Release the drag clearChildrenCache(); mTouchState = TOUCH_STATE_REST; mActivePointerId = INVALID_POINTER; mAllowLongPress = false; if (mVelocityTracker != null) { mVelocityTracker.recycle(); mVelocityTracker = null; } break; case MotionEvent.ACTION_POINTER_UP: onSecondaryPointerUp(ev); break; } /* * The only time we want to intercept motion events is if we are in the * drag mode. */ return mTouchState != TOUCH_STATE_REST; } private void onSecondaryPointerUp(MotionEvent ev) { final int pointerIndex = (ev.getAction() & MotionEvent.ACTION_POINTER_INDEX_MASK) >> MotionEvent.ACTION_POINTER_INDEX_SHIFT; final int pointerId = ev.getPointerId(pointerIndex); if (pointerId == mActivePointerId) { // This was our active pointer going up. Choose a new // active pointer and adjust accordingly. // TODO: Make this decision more intelligent. final int newPointerIndex = pointerIndex == 0 ? 1 : 0; mLastMotionX = ev.getX(newPointerIndex); mLastMotionY = ev.getY(newPointerIndex); mActivePointerId = ev.getPointerId(newPointerIndex); if (mVelocityTracker != null) { mVelocityTracker.clear(); } } } /** * If one of our descendant views decides that it could be focused now, only * pass that along if it's on the current screen. * * This happens when live folders requery, and if they're off screen, they * end up calling requestFocus, which pulls it on screen. */ @Override public void focusableViewAvailable(View focused) { View current = getChildAt(mCurrentScreen); View v = focused; while (true) { if (v == current) { super.focusableViewAvailable(focused); return; } if (v == this) { return; } ViewParent parent = v.getParent(); if (parent instanceof View) { v = (View) v.getParent(); } else { return; } } } void enableChildrenCache(int fromScreen, int toScreen) { if (fromScreen > toScreen) { final int temp = fromScreen; fromScreen = toScreen; toScreen = temp; } final int count = getChildCount(); fromScreen = Math.max(fromScreen, 0); toScreen = Math.min(toScreen, count - 1); for (int i = fromScreen; i <= toScreen; i++) { final CellLayout layout = (CellLayout) getChildAt(i); layout.setChildrenDrawnWithCacheEnabled(true); layout.setChildrenDrawingCacheEnabled(true); } } void clearChildrenCache() { final int count = getChildCount(); for (int i = 0; i < count; i++) { final CellLayout layout = (CellLayout) getChildAt(i); layout.setChildrenDrawnWithCacheEnabled(false); } } @Override public boolean onTouchEvent(MotionEvent ev) { if (mLauncher.isWorkspaceLocked()) { return false; // We don't want the events. Let them fall through to the all apps view. } if (mLauncher.isAllAppsVisible()) { // Cancel any scrolling that is in progress. if (!mScroller.isFinished()) { mScroller.abortAnimation(); } snapToScreen(mCurrentScreen); return false; // We don't want the events. Let them fall through to the all apps view. } if (mVelocityTracker == null) { mVelocityTracker = VelocityTracker.obtain(); } mVelocityTracker.addMovement(ev); final int action = ev.getAction(); switch (action & MotionEvent.ACTION_MASK) { case MotionEvent.ACTION_DOWN: /* * If being flinged and user touches, stop the fling. isFinished * will be false if being flinged. */ if (!mScroller.isFinished()) { mScroller.abortAnimation(); } // Remember where the motion event started mLastMotionX = ev.getX(); mActivePointerId = ev.getPointerId(0); if (mTouchState == TOUCH_STATE_SCROLLING) { enableChildrenCache(mCurrentScreen - 1, mCurrentScreen + 1); } break; case MotionEvent.ACTION_MOVE: if (mTouchState == TOUCH_STATE_SCROLLING) { // Scroll to follow the motion event final int pointerIndex = ev.findPointerIndex(mActivePointerId); final float x = ev.getX(pointerIndex); final float deltaX = mLastMotionX - x; mLastMotionX = x; if (deltaX < 0) { if (mTouchX > 0) { mTouchX += Math.max(-mTouchX, deltaX); mSmoothingTime = System.nanoTime() / NANOTIME_DIV; invalidate(); } } else if (deltaX > 0) { final float availableToScroll = getChildAt(getChildCount() - 1).getRight() - mTouchX - getWidth(); if (availableToScroll > 0) { mTouchX += Math.min(availableToScroll, deltaX); mSmoothingTime = System.nanoTime() / NANOTIME_DIV; invalidate(); } } else { awakenScrollBars(); } } break; case MotionEvent.ACTION_UP: if (mTouchState == TOUCH_STATE_SCROLLING) { final VelocityTracker velocityTracker = mVelocityTracker; velocityTracker.computeCurrentVelocity(1000, mMaximumVelocity); final int velocityX = (int) velocityTracker.getXVelocity(mActivePointerId); final int screenWidth = getWidth(); final int whichScreen = (mScrollX + (screenWidth / 2)) / screenWidth; final float scrolledPos = (float) mScrollX / screenWidth; if (velocityX > SNAP_VELOCITY && mCurrentScreen > 0) { // Fling hard enough to move left. // Don't fling across more than one screen at a time. final int bound = scrolledPos < whichScreen ? mCurrentScreen - 1 : mCurrentScreen; snapToScreen(Math.min(whichScreen, bound), velocityX, true); } else if (velocityX < -SNAP_VELOCITY && mCurrentScreen < getChildCount() - 1) { // Fling hard enough to move right // Don't fling across more than one screen at a time. final int bound = scrolledPos > whichScreen ? mCurrentScreen + 1 : mCurrentScreen; snapToScreen(Math.max(whichScreen, bound), velocityX, true); } else { snapToScreen(whichScreen, 0, true); } if (mVelocityTracker != null) { mVelocityTracker.recycle(); mVelocityTracker = null; } } mTouchState = TOUCH_STATE_REST; mActivePointerId = INVALID_POINTER; break; case MotionEvent.ACTION_CANCEL: mTouchState = TOUCH_STATE_REST; mActivePointerId = INVALID_POINTER; break; case MotionEvent.ACTION_POINTER_UP: onSecondaryPointerUp(ev); break; } return true; } void snapToScreen(int whichScreen) { snapToScreen(whichScreen, 0, false); } private void snapToScreen(int whichScreen, int velocity, boolean settle) { // if (!mScroller.isFinished()) return; whichScreen = Math.max(0, Math.min(whichScreen, getChildCount() - 1)); clearVacantCache(); enableChildrenCache(mCurrentScreen, whichScreen); mNextScreen = whichScreen; if (mPreviousIndicator != null) { mPreviousIndicator.setLevel(mNextScreen); mNextIndicator.setLevel(mNextScreen); } View focusedChild = getFocusedChild(); if (focusedChild != null && whichScreen != mCurrentScreen && focusedChild == getChildAt(mCurrentScreen)) { focusedChild.clearFocus(); } final int screenDelta = Math.max(1, Math.abs(whichScreen - mCurrentScreen)); final int newX = whichScreen * getWidth(); final int delta = newX - mScrollX; int duration = (screenDelta + 1) * 100; if (!mScroller.isFinished()) { mScroller.abortAnimation(); } if (settle) { mScrollInterpolator.setDistance(screenDelta); } else { mScrollInterpolator.disableSettle(); } velocity = Math.abs(velocity); if (velocity > 0) { duration += (duration / (velocity / BASELINE_FLING_VELOCITY)) * FLING_VELOCITY_INFLUENCE; } else { duration += 100; } awakenScrollBars(duration); mScroller.startScroll(mScrollX, 0, delta, 0, duration); invalidate(); } void startDrag(CellLayout.CellInfo cellInfo) { View child = cellInfo.cell; // Make sure the drag was started by a long press as opposed to a long click. if (!child.isInTouchMode()) { return; } mDragInfo = cellInfo; mDragInfo.screen = mCurrentScreen; CellLayout current = ((CellLayout) getChildAt(mCurrentScreen)); current.onDragChild(child); mDragController.startDrag(child, this, child.getTag(), DragController.DRAG_ACTION_MOVE); invalidate(); } @Override protected Parcelable onSaveInstanceState() { final SavedState state = new SavedState(super.onSaveInstanceState()); state.currentScreen = mCurrentScreen; return state; } @Override protected void onRestoreInstanceState(Parcelable state) { SavedState savedState = (SavedState) state; super.onRestoreInstanceState(savedState.getSuperState()); if (savedState.currentScreen != -1) { mCurrentScreen = savedState.currentScreen; Launcher.setScreen(mCurrentScreen); } } void addApplicationShortcut(ShortcutInfo info, CellLayout.CellInfo cellInfo) { addApplicationShortcut(info, cellInfo, false); } void addApplicationShortcut(ShortcutInfo info, CellLayout.CellInfo cellInfo, boolean insertAtFirst) { final CellLayout layout = (CellLayout) getChildAt(cellInfo.screen); final int[] result = new int[2]; layout.cellToPoint(cellInfo.cellX, cellInfo.cellY, result); onDropExternal(result[0], result[1], info, layout, insertAtFirst); } public void onDrop(DragSource source, int x, int y, int xOffset, int yOffset, DragView dragView, Object dragInfo) { final CellLayout cellLayout = getCurrentDropLayout(); if (source != this) { onDropExternal(x - xOffset, y - yOffset, dragInfo, cellLayout); } else { // Move internally if (mDragInfo != null) { final View cell = mDragInfo.cell; int index = mScroller.isFinished() ? mCurrentScreen : mNextScreen; if (index != mDragInfo.screen) { final CellLayout originalCellLayout = (CellLayout) getChildAt(mDragInfo.screen); originalCellLayout.removeView(cell); addInScreen(cell, index, mDragInfo.cellX, mDragInfo.cellY, mDragInfo.spanX, mDragInfo.spanY); } mTargetCell = estimateDropCell(x - xOffset, y - yOffset, mDragInfo.spanX, mDragInfo.spanY, cell, cellLayout, mTargetCell); cellLayout.onDropChild(cell); // update the item's position after drop final ItemInfo info = (ItemInfo) cell.getTag(); CellLayout.LayoutParams lp = (CellLayout.LayoutParams) cell .getLayoutParams(); lp.cellX = mTargetCell[0]; lp.cellY = mTargetCell[1]; LauncherModel.moveItemInDatabase(mLauncher, info, LauncherSettings.Favorites.CONTAINER_DESKTOP, index, lp.cellX, lp.cellY); } } } public void onDragEnter(DragSource source, int x, int y, int xOffset, int yOffset, DragView dragView, Object dragInfo) { clearVacantCache(); } public DropTarget getDropTargetDelegate(DragSource source, int x, int y, int xOffset, int yOffset, DragView dragView, Object dragInfo) { // We may need to delegate the drag to a child view. If a 1x1 item // would land in a cell occupied by a DragTarget (e.g. a Folder), // then drag events should be handled by that child. ItemInfo item = (ItemInfo)dragInfo; CellLayout currentLayout = getCurrentDropLayout(); int dragPointX, dragPointY; if (item.spanX == 1 && item.spanY == 1) { // For a 1x1, calculate the drop cell exactly as in onDragOver dragPointX = x - xOffset; dragPointY = y - yOffset; } else { // Otherwise, use the exact drag coordinates dragPointX = x; dragPointY = y; } // If we are dragging over a cell that contains a DropTarget that will // accept the drop, delegate to that DropTarget. final int[] cellXY = mTempCell; currentLayout.estimateDropCell(dragPointX, dragPointY, item.spanX, item.spanY, cellXY); View child = currentLayout.getChildAt(cellXY[0], cellXY[1]); if (child instanceof DropTarget) { DropTarget target = (DropTarget)child; if (target.acceptDrop(source, x, y, xOffset, yOffset, dragView, dragInfo)) { return target; } } return null; } public void onDragOver(DragSource source, int x, int y, int xOffset, int yOffset, DragView dragView, Object dragInfo) { ItemInfo item = (ItemInfo)dragInfo; CellLayout currentLayout = getCurrentDropLayout(); if (dragInfo instanceof LauncherAppWidgetInfo) { LauncherAppWidgetInfo widgetInfo = (LauncherAppWidgetInfo)dragInfo; if (widgetInfo.spanX == -1) { // Calculate the grid spans needed to fit this widget int[] spans = currentLayout.rectToCell(widgetInfo.minWidth, widgetInfo.minHeight); item.spanX = spans[0]; item.spanY = spans[1]; } } if (currentLayout != mDragTargetLayout) { if (mDragTargetLayout != null) { mDragTargetLayout.onDragComplete(); } mDragTargetLayout = currentLayout; } // Find the top left corner of the item int originX = x - xOffset; int originY = y - yOffset; final View child = (mDragInfo == null) ? null : mDragInfo.cell; currentLayout.visualizeDropLocation(child, originX, originY, item.spanX, item.spanY); } public void onDragExit(DragSource source, int x, int y, int xOffset, int yOffset, DragView dragView, Object dragInfo) { clearVacantCache(); if (mDragTargetLayout != null) { mDragTargetLayout.onDragComplete(); mDragTargetLayout = null; } } private void onDropExternal(int x, int y, Object dragInfo, CellLayout cellLayout) { onDropExternal(x, y, dragInfo, cellLayout, false); } private void onDropExternal(int x, int y, Object dragInfo, CellLayout cellLayout, boolean insertAtFirst) { // Drag from somewhere else ItemInfo info = (ItemInfo) dragInfo; View view = null; switch (info.itemType) { case LauncherSettings.Favorites.ITEM_TYPE_APPLICATION: case LauncherSettings.Favorites.ITEM_TYPE_SHORTCUT: if (info.container == NO_ID && info instanceof ApplicationInfo) { // Came from all apps -- make a copy info = new ShortcutInfo((ApplicationInfo) info); } view = mLauncher.createShortcut(R.layout.application, cellLayout, (ShortcutInfo) info); break; case LauncherSettings.Favorites.ITEM_TYPE_USER_FOLDER: view = FolderIcon.fromXml(R.layout.folder_icon, mLauncher, (ViewGroup) getChildAt(mCurrentScreen), ((UserFolderInfo) info)); break; case LauncherSettings.Favorites.ITEM_TYPE_APPWIDGET: cellLayout.setTagToCellInfoForPoint(x, y); mLauncher.addAppWidgetFromDrop(((LauncherAppWidgetInfo)dragInfo).providerName, cellLayout.getTag()); break; default: throw new IllegalStateException("Unknown item type: " + info.itemType); } // If the view is null, it has already been added. if (view == null) { cellLayout.onDragComplete(); } else { mTargetCell = estimateDropCell(x, y, 1, 1, view, cellLayout, mTargetCell); addInScreen(view, indexOfChild(cellLayout), mTargetCell[0], mTargetCell[1], info.spanX, info.spanY, insertAtFirst); cellLayout.onDropChild(view); CellLayout.LayoutParams lp = (CellLayout.LayoutParams) view.getLayoutParams(); LauncherModel.addOrMoveItemInDatabase(mLauncher, info, LauncherSettings.Favorites.CONTAINER_DESKTOP, mCurrentScreen, lp.cellX, lp.cellY); } } /** * Return the current {@link CellLayout}, correctly picking the destination * screen while a scroll is in progress. */ private CellLayout getCurrentDropLayout() { int index = mScroller.isFinished() ? mCurrentScreen : mNextScreen; return (CellLayout) getChildAt(index); } /** * {@inheritDoc} */ public boolean acceptDrop(DragSource source, int x, int y, int xOffset, int yOffset, DragView dragView, Object dragInfo) { final CellLayout layout = getCurrentDropLayout(); final CellLayout.CellInfo cellInfo = mDragInfo; final int spanX = cellInfo == null ? 1 : cellInfo.spanX; final int spanY = cellInfo == null ? 1 : cellInfo.spanY; if (mVacantCache == null) { final View ignoreView = cellInfo == null ? null : cellInfo.cell; mVacantCache = layout.findAllVacantCells(null, ignoreView); } if (mVacantCache.findCellForSpan(mTempEstimate, spanX, spanY, false)) { return true; } else { Toast.makeText(getContext(), getContext().getString(R.string.out_of_space), Toast.LENGTH_SHORT).show(); return false; } } /** * {@inheritDoc} */ public Rect estimateDropLocation(DragSource source, int x, int y, int xOffset, int yOffset, DragView dragView, Object dragInfo, Rect recycle) { final CellLayout layout = getCurrentDropLayout(); final CellLayout.CellInfo cellInfo = mDragInfo; final int spanX = cellInfo == null ? 1 : cellInfo.spanX; final int spanY = cellInfo == null ? 1 : cellInfo.spanY; final View ignoreView = cellInfo == null ? null : cellInfo.cell; final Rect location = recycle != null ? recycle : new Rect(); // Find drop cell and convert into rectangle int[] dropCell = estimateDropCell(x - xOffset, y - yOffset, spanX, spanY, ignoreView, layout, mTempCell); if (dropCell == null) { return null; } layout.cellToPoint(dropCell[0], dropCell[1], mTempEstimate); location.left = mTempEstimate[0]; location.top = mTempEstimate[1]; layout.cellToPoint(dropCell[0] + spanX, dropCell[1] + spanY, mTempEstimate); location.right = mTempEstimate[0]; location.bottom = mTempEstimate[1]; return location; } /** * Calculate the nearest cell where the given object would be dropped. */ private int[] estimateDropCell(int pixelX, int pixelY, int spanX, int spanY, View ignoreView, CellLayout layout, int[] recycle) { final int[] cellXY = mTempCell; layout.estimateDropCell(pixelX, pixelY, spanX, spanY, cellXY); layout.cellToPoint(cellXY[0], cellXY[1], mTempEstimate); // Create vacant cell cache if none exists if (mVacantCache == null) { mVacantCache = layout.findAllVacantCells(null, ignoreView); } // Find the best target drop location return layout.findNearestVacantArea(mTempEstimate[0], mTempEstimate[1], spanX, spanY, mVacantCache, recycle); } void setLauncher(Launcher launcher) { mLauncher = launcher; } public void setDragController(DragController dragController) { mDragController = dragController; } public void onDropCompleted(View target, boolean success) { clearVacantCache(); if (success) { if (target != this && mDragInfo != null) { final CellLayout cellLayout = (CellLayout) getChildAt(mDragInfo.screen); cellLayout.removeView(mDragInfo.cell); if (mDragInfo.cell instanceof DropTarget) { mDragController.removeDropTarget((DropTarget)mDragInfo.cell); } // final Object tag = mDragInfo.cell.getTag(); } } else { if (mDragInfo != null) { final CellLayout cellLayout = (CellLayout) getChildAt(mDragInfo.screen); cellLayout.onDropAborted(mDragInfo.cell); } } mDragInfo = null; } public void scrollLeft() { clearVacantCache(); if (mScroller.isFinished()) { if (mCurrentScreen > 0) snapToScreen(mCurrentScreen - 1); } else { if (mNextScreen > 0) snapToScreen(mNextScreen - 1); } } public void scrollRight() { clearVacantCache(); if (mScroller.isFinished()) { if (mCurrentScreen < getChildCount() - 1) snapToScreen(mCurrentScreen + 1); } else { if (mNextScreen < getChildCount() - 1) snapToScreen(mNextScreen + 1); } } public int getScreenForView(View v) { int result = -1; if (v != null) { ViewParent vp = v.getParent(); int count = getChildCount(); for (int i = 0; i < count; i++) { if (vp == getChildAt(i)) { return i; } } } return result; } public Folder getFolderForTag(Object tag) { int screenCount = getChildCount(); for (int screen = 0; screen < screenCount; screen++) { CellLayout currentScreen = ((CellLayout) getChildAt(screen)); int count = currentScreen.getChildCount(); for (int i = 0; i < count; i++) { View child = currentScreen.getChildAt(i); CellLayout.LayoutParams lp = (CellLayout.LayoutParams) child.getLayoutParams(); if (lp.cellHSpan == 4 && lp.cellVSpan == 4 && child instanceof Folder) { Folder f = (Folder) child; if (f.getInfo() == tag && f.getInfo().opened) { return f; } } } } return null; } public View getViewForTag(Object tag) { int screenCount = getChildCount(); for (int screen = 0; screen < screenCount; screen++) { CellLayout currentScreen = ((CellLayout) getChildAt(screen)); int count = currentScreen.getChildCount(); for (int i = 0; i < count; i++) { View child = currentScreen.getChildAt(i); if (child.getTag() == tag) { return child; } } } return null; } /** * @return True is long presses are still allowed for the current touch */ public boolean allowLongPress() { return mAllowLongPress; } /** * Set true to allow long-press events to be triggered, usually checked by * {@link Launcher} to accept or block dpad-initiated long-presses. */ public void setAllowLongPress(boolean allowLongPress) { mAllowLongPress = allowLongPress; } void removeItems(final ArrayList apps) { final int count = getChildCount(); final PackageManager manager = getContext().getPackageManager(); final AppWidgetManager widgets = AppWidgetManager.getInstance(getContext()); final HashSet packageNames = new HashSet(); final int appCount = apps.size(); for (int i = 0; i < appCount; i++) { packageNames.add(apps.get(i).componentName.getPackageName()); } for (int i = 0; i < count; i++) { final CellLayout layout = (CellLayout) getChildAt(i); // Avoid ANRs by treating each screen separately post(new Runnable() { public void run() { final ArrayList childrenToRemove = new ArrayList(); childrenToRemove.clear(); int childCount = layout.getChildCount(); for (int j = 0; j < childCount; j++) { final View view = layout.getChildAt(j); Object tag = view.getTag(); if (tag instanceof ShortcutInfo) { final ShortcutInfo info = (ShortcutInfo) tag; final Intent intent = info.intent; final ComponentName name = intent.getComponent(); if (Intent.ACTION_MAIN.equals(intent.getAction()) && name != null) { for (String packageName: packageNames) { if (packageName.equals(name.getPackageName())) { // TODO: This should probably be done on a worker thread LauncherModel.deleteItemFromDatabase(mLauncher, info); childrenToRemove.add(view); } } } } else if (tag instanceof UserFolderInfo) { final UserFolderInfo info = (UserFolderInfo) tag; final ArrayList contents = info.contents; final ArrayList toRemove = new ArrayList(1); final int contentsCount = contents.size(); boolean removedFromFolder = false; for (int k = 0; k < contentsCount; k++) { final ShortcutInfo appInfo = contents.get(k); final Intent intent = appInfo.intent; final ComponentName name = intent.getComponent(); if (Intent.ACTION_MAIN.equals(intent.getAction()) && name != null) { for (String packageName: packageNames) { if (packageName.equals(name.getPackageName())) { toRemove.add(appInfo); // TODO: This should probably be done on a worker thread LauncherModel.deleteItemFromDatabase( mLauncher, appInfo); removedFromFolder = true; } } } } contents.removeAll(toRemove); if (removedFromFolder) { final Folder folder = getOpenFolder(); if (folder != null) folder.notifyDataSetChanged(); } } else if (tag instanceof LiveFolderInfo) { final LiveFolderInfo info = (LiveFolderInfo) tag; final Uri uri = info.uri; final ProviderInfo providerInfo = manager.resolveContentProvider( uri.getAuthority(), 0); if (providerInfo != null) { for (String packageName: packageNames) { if (packageName.equals(providerInfo.packageName)) { // TODO: This should probably be done on a worker thread LauncherModel.deleteItemFromDatabase(mLauncher, info); childrenToRemove.add(view); } } } } else if (tag instanceof LauncherAppWidgetInfo) { final LauncherAppWidgetInfo info = (LauncherAppWidgetInfo) tag; final AppWidgetProviderInfo provider = widgets.getAppWidgetInfo(info.appWidgetId); if (provider != null) { for (String packageName: packageNames) { if (packageName.equals(provider.provider.getPackageName())) { // TODO: This should probably be done on a worker thread LauncherModel.deleteItemFromDatabase(mLauncher, info); childrenToRemove.add(view); } } } } } childCount = childrenToRemove.size(); for (int j = 0; j < childCount; j++) { View child = childrenToRemove.get(j); layout.removeViewInLayout(child); if (child instanceof DropTarget) { mDragController.removeDropTarget((DropTarget)child); } } if (childCount > 0) { layout.requestLayout(); layout.invalidate(); } } }); } } void updateShortcuts(ArrayList apps) { final PackageManager pm = mLauncher.getPackageManager(); final int count = getChildCount(); for (int i = 0; i < count; i++) { final CellLayout layout = (CellLayout) getChildAt(i); int childCount = layout.getChildCount(); for (int j = 0; j < childCount; j++) { final View view = layout.getChildAt(j); Object tag = view.getTag(); if (tag instanceof ShortcutInfo) { ShortcutInfo info = (ShortcutInfo)tag; // We need to check for ACTION_MAIN otherwise getComponent() might // return null for some shortcuts (for instance, for shortcuts to // web pages.) final Intent intent = info.intent; final ComponentName name = intent.getComponent(); if (info.itemType == LauncherSettings.Favorites.ITEM_TYPE_APPLICATION && Intent.ACTION_MAIN.equals(intent.getAction()) && name != null) { final int appCount = apps.size(); for (int k = 0; k < appCount; k++) { ApplicationInfo app = apps.get(k); if (app.componentName.equals(name)) { info.setIcon(mIconCache.getIcon(info.intent)); ((TextView)view).setCompoundDrawablesWithIntrinsicBounds(null, new FastBitmapDrawable(info.getIcon(mIconCache)), null, null); } } } } } } } void moveToDefaultScreen(boolean animate) { if (animate) { snapToScreen(mDefaultScreen); } else { setCurrentScreen(mDefaultScreen); } getChildAt(mDefaultScreen).requestFocus(); } void setIndicators(Drawable previous, Drawable next) { mPreviousIndicator = previous; mNextIndicator = next; previous.setLevel(mCurrentScreen); next.setLevel(mCurrentScreen); } public static class SavedState extends BaseSavedState { int currentScreen = -1; SavedState(Parcelable superState) { super(superState); } private SavedState(Parcel in) { super(in); currentScreen = in.readInt(); } @Override public void writeToParcel(Parcel out, int flags) { super.writeToParcel(out, flags); out.writeInt(currentScreen); } public static final Parcelable.Creator CREATOR = new Parcelable.Creator() { public SavedState createFromParcel(Parcel in) { return new SavedState(in); } public SavedState[] newArray(int size) { return new SavedState[size]; } }; } }