/* * 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.launcher; import android.content.Context; import android.content.res.TypedArray; import android.graphics.Bitmap; import android.graphics.Canvas; import android.graphics.Paint; import android.graphics.RectF; import android.graphics.Rect; import android.util.AttributeSet; 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.widget.Scroller; import android.os.Parcelable; import android.os.Parcel; import java.util.ArrayList; /** * 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 { 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 = 1000; private int mDefaultScreen; private Paint mPaint; private Bitmap mWallpaper; private int mWallpaperWidth; private int mWallpaperHeight; private float mWallpaperOffset; private boolean mWallpaperLoaded; 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; 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 OnLongClickListener mLongClickListener; private Launcher mLauncher; private DragController mDragger; private int[] mTempCell = new int[2]; private boolean mAllowLongPress; private boolean mLocked; private int mTouchSlop; /** * 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); TypedArray a = context.obtainStyledAttributes(attrs, R.styleable.Workspace, defStyle, 0); mDefaultScreen = a.getInt(R.styleable.Workspace_defaultScreen, 1); a.recycle(); initWorkspace(); } /** * Initializes various states for this workspace. */ private void initWorkspace() { mScroller = new Scroller(getContext()); mCurrentScreen = mDefaultScreen; Launcher.setScreen(mCurrentScreen); mPaint = new Paint(); mPaint.setDither(false); mTouchSlop = ViewConfiguration.get(getContext()).getScaledTouchSlop(); } /** * Set the background's wallpaper. */ void loadWallpaper(Bitmap bitmap) { mWallpaper = bitmap; mWallpaperLoaded = true; requestLayout(); invalidate(); } @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); CellLayout.LayoutParams lp = (CellLayout.LayoutParams) child.getLayoutParams(); if (lp.cellHSpan == 4 && lp.cellVSpan == 4 && child instanceof Folder) { return (Folder) child; } } 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 (lp.cellHSpan == 4 && lp.cellVSpan == 4 && child instanceof Folder) { folders.add((Folder) child); 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; } /** * Computes a bounding rectangle for a range of cells * * @param cellX X coordinate of upper left corner expressed as a cell position * @param cellY Y coordinate of upper left corner expressed as a cell position * @param cellHSpan Width in cells * @param cellVSpan Height in cells * @param rect Rectnagle into which to put the results */ public void cellToRect(int cellX, int cellY, int cellHSpan, int cellVSpan, RectF rect) { ((CellLayout)getChildAt(mCurrentScreen)).cellToRect(cellX, cellY, cellHSpan, cellVSpan, rect); } /** * Sets the current screen. * * @param currentScreen */ void setCurrentScreen(int currentScreen) { mCurrentScreen = Math.max(0, Math.min(currentScreen, getChildCount() - 1)); scrollTo(mCurrentScreen * getWidth(), 0); invalidate(); } /** * Shows the default screen (defined by the firstScreen attribute in XML.) */ void showDefaultScreen() { setCurrentScreen(mDefaultScreen); } /** * 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); } /** * 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()) { throw new IllegalStateException("The screen must be >= 0 and < " + getChildCount()); } 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; } group.addView(child, insert ? 0 : -1, lp); if (!(child instanceof Folder)) { child.setOnLongClickListener(mLongClickListener); } } void addWidget(View view, Widget widget) { addInScreen(view, widget.screen, widget.cellX, widget.cellY, widget.spanX, widget.spanY, false); } void addWidget(View view, Widget widget, boolean insert) { addInScreen(view, widget.screen, widget.cellX, widget.cellY, widget.spanX, widget.spanY, insert); } CellLayout.CellInfo findAllVacantCells(boolean[] occupied) { CellLayout group = (CellLayout) getChildAt(mCurrentScreen); if (group != null) { return group.findAllVacantCells(occupied); } return null; } /** * Returns the coordinate of a vacant cell for the current screen. */ boolean getVacantCell(int[] vacant, int spanX, int spanY) { CellLayout group = (CellLayout) getChildAt(mCurrentScreen); if (group != null) { return group.getVacantCell(vacant, spanX, spanY); } return 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 spanX The number of cells spanned horizontally by the child. * @param spanY The number of cells spanned vertically by the child. */ void fitInCurrentScreen(View child, int spanX, int spanY) { fitInScreen(child, mCurrentScreen, spanX, spanY); } /** * 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 spanX The number of cells spanned horizontally by the child. * @param spanY The number of cells spanned vertically by the child. */ void fitInScreen(View child, int screen, int spanX, int spanY) { if (screen < 0 || screen >= getChildCount()) { throw new IllegalStateException("The screen must be >= 0 and < " + getChildCount()); } final CellLayout group = (CellLayout) getChildAt(screen); boolean vacant = group.getVacantCell(mTempCell, spanX, spanY); if (vacant) { group.addView(child, new CellLayout.LayoutParams(mTempCell[0], mTempCell[1], spanX, spanY)); child.setOnLongClickListener(mLongClickListener); if (!(child instanceof Folder)) { child.setOnLongClickListener(mLongClickListener); } } } /** * 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); } } @Override public void computeScroll() { if (mScroller.computeScrollOffset()) { mScrollX = mScroller.getCurrX(); mScrollY = mScroller.getCurrY(); postInvalidate(); } else if (mNextScreen != INVALID_SCREEN) { mCurrentScreen = Math.max(0, Math.min(mNextScreen, getChildCount() - 1)); Launcher.setScreen(mCurrentScreen); mNextScreen = INVALID_SCREEN; clearChildrenCache(); } } @Override protected void dispatchDraw(Canvas canvas) { float x = mScrollX * mWallpaperOffset; if (x + mWallpaperWidth < mRight - mLeft) { x = mRight - mLeft - mWallpaperWidth; } canvas.drawBitmap(mWallpaper, x, (mBottom - mTop - mWallpaperHeight) / 2, mPaint); // 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(); // If we are flinging, draw only the current screen and the target screen if (mNextScreen >= 0 && mNextScreen < getChildCount() && Math.abs(mCurrentScreen - mNextScreen) == 1) { drawChild(canvas, getChildAt(mCurrentScreen), drawingTime); drawChild(canvas, getChildAt(mNextScreen), drawingTime); } else { // If we are scrolling, draw all of our children final int count = getChildCount(); for (int i = 0; i < count; i++) { drawChild(canvas, getChildAt(i), drawingTime); } } } } @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 (mWallpaperLoaded) { mWallpaperLoaded = false; mWallpaper = Utilities.centerToFit(mWallpaper, width, MeasureSpec.getSize(heightMeasureSpec), getContext()); mWallpaperWidth = mWallpaper.getWidth(); mWallpaperHeight = mWallpaper.getHeight(); } final int wallpaperWidth = mWallpaperWidth; mWallpaperOffset = wallpaperWidth > width ? (count * width - wallpaperWidth) / ((count - 1) * (float) width) : 1.0f; if (mFirstLayout) { scrollTo(mCurrentScreen * width, 0); 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; } } } @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.isDrawerDown()) { 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) { if (mLauncher.isDrawerDown()) { 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 onInterceptTouchEvent(MotionEvent ev) { if (mLocked || !mLauncher.isDrawerDown()) { return true; } /* * 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; } final float x = ev.getX(); final float y = ev.getY(); switch (action) { 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 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; enableChildrenCache(); } // 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: // Remember location of down touch mLastMotionX = x; mLastMotionY = y; 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: // Release the drag clearChildrenCache(); mTouchState = TOUCH_STATE_REST; break; } /* * The only time we want to intercept motion events is if we are in the * drag mode. */ return mTouchState != TOUCH_STATE_REST; } void enableChildrenCache() { final int count = getChildCount(); for (int i = 0; i < count; 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 (mLocked || !mLauncher.isDrawerDown()) { return true; } if (mVelocityTracker == null) { mVelocityTracker = VelocityTracker.obtain(); } mVelocityTracker.addMovement(ev); final int action = ev.getAction(); final float x = ev.getX(); switch (action) { 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 = x; break; case MotionEvent.ACTION_MOVE: if (mTouchState == TOUCH_STATE_SCROLLING) { // Scroll to follow the motion event final int deltaX = (int) (mLastMotionX - x); mLastMotionX = x; if (deltaX < 0) { if (mScrollX > 0) { scrollBy(Math.max(-mScrollX, deltaX), 0); } } else if (deltaX > 0) { final int availableToScroll = getChildAt(getChildCount() - 1).getRight() - mScrollX - getWidth(); if (availableToScroll > 0) { scrollBy(Math.min(availableToScroll, deltaX), 0); } } } break; case MotionEvent.ACTION_UP: if (mTouchState == TOUCH_STATE_SCROLLING) { final VelocityTracker velocityTracker = mVelocityTracker; velocityTracker.computeCurrentVelocity(1000); int velocityX = (int) velocityTracker.getXVelocity(); if (velocityX > SNAP_VELOCITY && mCurrentScreen > 0) { // Fling hard enough to move left snapToScreen(mCurrentScreen - 1); } else if (velocityX < -SNAP_VELOCITY && mCurrentScreen < getChildCount() - 1) { // Fling hard enough to move right snapToScreen(mCurrentScreen + 1); } else { snapToDestination(); } if (mVelocityTracker != null) { mVelocityTracker.recycle(); mVelocityTracker = null; } } mTouchState = TOUCH_STATE_REST; break; case MotionEvent.ACTION_CANCEL: mTouchState = TOUCH_STATE_REST; } return true; } private void snapToDestination() { final int screenWidth = getWidth(); final int whichScreen = (mScrollX + (screenWidth / 2)) / screenWidth; snapToScreen(whichScreen); } void snapToScreen(int whichScreen) { enableChildrenCache(); whichScreen = Math.max(0, Math.min(whichScreen, getChildCount() - 1)); boolean changingScreens = whichScreen != mCurrentScreen; mNextScreen = whichScreen; View focusedChild = getFocusedChild(); if (focusedChild != null && changingScreens && focusedChild == getChildAt(mCurrentScreen)) { focusedChild.clearFocus(); } final int newX = whichScreen * getWidth(); final int delta = newX - mScrollX; mScroller.startScroll(mScrollX, 0, delta, 0, Math.abs(delta) * 2); 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. // Note that Search takes focus when clicked rather than entering touch mode if (!child.isInTouchMode() && !(child instanceof Search)) { return; } mDragInfo = cellInfo; mDragInfo.screen = mCurrentScreen; CellLayout current = ((CellLayout) getChildAt(mCurrentScreen)); current.onDragChild(child); mDragger.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(ApplicationInfo info, CellLayout.CellInfo cellInfo) { addApplicationShortcut(info, cellInfo, false); } void addApplicationShortcut(ApplicationInfo 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, Object dragInfo) { final CellLayout cellLayout = (CellLayout) getChildAt(mCurrentScreen); if (source != this) { onDropExternal(x - xOffset, y - yOffset, dragInfo, cellLayout); } else { // Move internally if (mDragInfo != null) { final View cell = mDragInfo.cell; if (mCurrentScreen != mDragInfo.screen) { final CellLayout originalCellLayout = (CellLayout) getChildAt(mDragInfo.screen); originalCellLayout.removeView(cell); cellLayout.addView(cell); } cellLayout.onDropChild(cell, x - xOffset, y - yOffset); final ItemInfo info = (ItemInfo)cell.getTag(); CellLayout.LayoutParams lp = (CellLayout.LayoutParams) cell.getLayoutParams(); LauncherModel.moveItemInDatabase(mLauncher, info, LauncherSettings.Favorites.CONTAINER_DESKTOP, mCurrentScreen, lp.cellX, lp.cellY); } } } public void onDragEnter(DragSource source, int x, int y, int xOffset, int yOffset, Object dragInfo) { } public void onDragOver(DragSource source, int x, int y, int xOffset, int yOffset, Object dragInfo) { } public void onDragExit(DragSource source, int x, int y, int xOffset, int yOffset, Object dragInfo) { } 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; switch (info.itemType) { case LauncherSettings.Favorites.ITEM_TYPE_APPLICATION: case LauncherSettings.Favorites.ITEM_TYPE_SHORTCUT: if (info.container == NO_ID) { // Came from all apps -- make a copy info = new ApplicationInfo((ApplicationInfo) info); } view = mLauncher.createShortcut(R.layout.application, cellLayout, (ApplicationInfo) info); break; case LauncherSettings.Favorites.ITEM_TYPE_USER_FOLDER: view = FolderIcon.fromXml(R.layout.folder_icon, mLauncher, (ViewGroup) getChildAt(mCurrentScreen), ((UserFolderInfo) info)); break; default: throw new IllegalStateException("Unknown item type: " + info.itemType); } cellLayout.addView(view, insertAtFirst ? 0 : -1); view.setOnLongClickListener(mLongClickListener); cellLayout.onDropChild(view, x, y); CellLayout.LayoutParams lp = (CellLayout.LayoutParams) view.getLayoutParams(); final LauncherModel model = Launcher.getModel(); model.addDesktopItem(info); LauncherModel.addOrMoveItemInDatabase(mLauncher, info, LauncherSettings.Favorites.CONTAINER_DESKTOP, mCurrentScreen, lp.cellX, lp.cellY); } public boolean acceptDrop(DragSource source, int x, int y, int xOffset, int yOffset, Object dragInfo) { final CellLayout.CellInfo cellInfo = mDragInfo; int cellHSpan = cellInfo == null ? 1 : cellInfo.spanX; int cellVSpan = cellInfo == null ? 1 : cellInfo.spanY; return ((CellLayout) getChildAt(mCurrentScreen)).acceptChildDrop(x - xOffset, y - yOffset, cellHSpan, cellVSpan, cellInfo == null ? null : cellInfo.cell); } void setLauncher(Launcher launcher) { mLauncher = launcher; } public void setDragger(DragController dragger) { mDragger = dragger; } public void onDropCompleted(View target, boolean success) { if (success){ if (target != this && mDragInfo != null) { final CellLayout cellLayout = (CellLayout) getChildAt(mDragInfo.screen); cellLayout.removeView(mDragInfo.cell); final Object tag = mDragInfo.cell.getTag(); Launcher.getModel().removeDesktopItem((ItemInfo) tag); } } else { if (mDragInfo != null) { final CellLayout cellLayout = (CellLayout) getChildAt(mDragInfo.screen); cellLayout.onDropAborted(mDragInfo.cell); } } mDragInfo = null; } public void scrollLeft() { if (mNextScreen == INVALID_SCREEN && mCurrentScreen > 0 && mScroller.isFinished()) { snapToScreen(mCurrentScreen - 1); } } public void scrollRight() { if (mNextScreen == INVALID_SCREEN && mCurrentScreen < getChildCount() -1 && mScroller.isFinished()) { snapToScreen(mCurrentScreen + 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; } /** * Find a search widget on the given screen */ private View findSearchWidget(CellLayout screen) { final int count = screen.getChildCount(); for (int i = 0; i < count; i++) { View v = screen.getChildAt(i); if (v instanceof Search) { return v; } } return null; } /** * Focuses on the search widget on the specified screen, * if there is one. Also clears the current search selection so we don't */ private boolean focusOnSearch(int screen) { CellLayout currentScreen = (CellLayout)getChildAt(screen); Search searchWidget = (Search)findSearchWidget(currentScreen); if (searchWidget != null) { if (isInTouchMode()) { searchWidget.requestFocusFromTouch(); } else { searchWidget.requestFocus(); } searchWidget.clearQuery(); return true; } return false; } /** * Snap to the nearest screen with a search widget and give it focus * * @return True if a search widget was found */ public boolean snapToSearch() { // The screen we are searching int current = mCurrentScreen; // first position scanned so far int first = current; // last position scanned so far int last = current; // True if we should move down on the next iteration boolean next = false; // True when we have looked at the first item in the data boolean hitFirst; // True when we have looked at the last item in the data boolean hitLast; final int count = getChildCount(); while (true) { if (focusOnSearch(current)) { return true; } hitLast = last == count - 1; hitFirst = first == 0; if (hitLast && hitFirst) { // Looked at everything break; } if (hitFirst || (next && !hitLast)) { // Either we hit the top, or we are trying to move down last++; current = last; // Try going up next time next = false; } else { // Either we hit the bottom, or we are trying to move up first--; current = first; // Try going down next time next = true; } } return false; } 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) { 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; } /** * Unlocks the SlidingDrawer so that touch events are processed. * * @see #lock() */ public void unlock() { mLocked = false; } /** * Locks the SlidingDrawer so that touch events are ignores. * * @see #unlock() */ public void lock() { mLocked = true; } /** * @return True is long presses are still allowed for the current touch */ public boolean allowLongPress() { return mAllowLongPress; } void removeShortcutsForPackage(String packageName) { final ArrayList childrenToRemove = new ArrayList(); final LauncherModel model = Launcher.getModel(); final int count = getChildCount(); for (int i = 0; i < count; i++) { final CellLayout layout = (CellLayout) getChildAt(i); int childCount = layout.getChildCount(); childrenToRemove.clear(); for (int j = 0; j < childCount; j++) { final View view = layout.getChildAt(j); Object tag = view.getTag(); if (tag instanceof ApplicationInfo) { ApplicationInfo info = (ApplicationInfo) tag; if (packageName.equals(info.intent.getComponent().getPackageName())) { model.removeDesktopItem(info); LauncherModel.deleteItemFromDatabase(mLauncher, info); childrenToRemove.add(view); } } } childCount = childrenToRemove.size(); for (int j = 0; j < childCount; j++) { layout.removeViewInLayout(childrenToRemove.get(j)); } if (childCount > 0) { layout.requestLayout(); layout.invalidate(); } } } // TODO: remove gadgets when gadgetmanager tells us they're gone // void removeGadgetsForProvider() { // } void moveToDefaultScreen() { snapToScreen(mDefaultScreen); getChildAt(mDefaultScreen).requestFocus(); } 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]; } }; } }