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/*
* 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.animation.Animatable;
import android.animation.PropertyAnimator;
import android.animation.PropertyValuesHolder;
import android.animation.Sequencer;
import android.animation.Animatable.AnimatableListener;
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.Resources;
import android.content.res.TypedArray;
import android.graphics.Canvas;
import android.graphics.Matrix;
import android.graphics.Rect;
import android.graphics.drawable.Drawable;
import android.net.Uri;
import android.os.IBinder;
import android.os.Parcelable;
import android.util.AttributeSet;
import android.util.Log;
import android.view.MotionEvent;
import android.view.View;
import android.view.ViewGroup;
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 pages.
* Each page 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 SmoothPagedView
implements DropTarget, DragSource, DragScroller, View.OnTouchListener {
@SuppressWarnings({"UnusedDeclaration"})
private static final String TAG = "Launcher.Workspace";
// This is how much the workspace shrinks when we enter all apps or
// customization mode
private static final float SHRINK_FACTOR = 0.16f;
private enum ShrinkPosition { SHRINK_TO_TOP, SHRINK_TO_MIDDLE, SHRINK_TO_BOTTOM };
private final WallpaperManager mWallpaperManager;
private int mDefaultPage;
private boolean mWaitingToShrinkToBottom = false;
/**
* 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 Launcher mLauncher;
private IconCache mIconCache;
private DragController mDragController;
private int[] mTempCell = new int[2];
private int[] mTempEstimate = new int[2];
private float[] mTempDragCoordinates = new float[2];
private float[] mTempDragBottomRightCoordinates = new float[2];
private static final int DEFAULT_CELL_COUNT_X = 4;
private static final int DEFAULT_CELL_COUNT_Y = 4;
private Drawable mPreviousIndicator;
private Drawable mNextIndicator;
// State variable that indicated whether the pages are small (ie when you're
// in all apps or customize mode)
private boolean mIsSmall;
private AnimatableListener mUnshrinkAnimationListener;
/**
* Used to inflate the Workspace from XML.
*
* @param context The application's context.
* @param attrs The attributes 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 attributes set containing the Workspace's customization values.
* @param defStyle Unused.
*/
public Workspace(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
mContentIsRefreshable = false;
mFadeInAdjacentScreens = false;
mWallpaperManager = WallpaperManager.getInstance(context);
TypedArray a = context.obtainStyledAttributes(attrs,
R.styleable.Workspace, defStyle, 0);
int cellCountX = a.getInt(R.styleable.Workspace_cellCountX, DEFAULT_CELL_COUNT_X);
int cellCountY = a.getInt(R.styleable.Workspace_cellCountY, DEFAULT_CELL_COUNT_Y);
mDefaultPage = a.getInt(R.styleable.Workspace_defaultScreen, 1);
a.recycle();
LauncherModel.updateWorkspaceLayoutCells(cellCountX, cellCountY);
setHapticFeedbackEnabled(false);
initWorkspace();
}
/**
* Initializes various states for this workspace.
*/
protected void initWorkspace() {
Context context = getContext();
mCurrentPage = mDefaultPage;
Launcher.setScreen(mCurrentPage);
LauncherApplication app = (LauncherApplication)context.getApplicationContext();
mIconCache = app.getIconCache();
mUnshrinkAnimationListener = new AnimatableListener() {
public void onAnimationStart(Animatable animation) {}
public void onAnimationEnd(Animatable animation) {
mIsSmall = false;
}
public void onAnimationCancel(Animatable animation) {}
public void onAnimationRepeat(Animatable animation) {}
};
mSnapVelocity = 600;
}
@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 currentPage = (CellLayout) getChildAt(mCurrentPage);
int count = currentPage.getChildCount();
for (int i = 0; i < count; i++) {
View child = currentPage.getChildAt(i);
if (child instanceof Folder) {
Folder folder = (Folder) child;
if (folder.getInfo().opened)
return folder;
}
}
return null;
}
ArrayList<Folder> getOpenFolders() {
final int screenCount = getChildCount();
ArrayList<Folder> folders = new ArrayList<Folder>(screenCount);
for (int screen = 0; screen < screenCount; screen++) {
CellLayout currentPage = (CellLayout) getChildAt(screen);
int count = currentPage.getChildCount();
for (int i = 0; i < count; i++) {
View child = currentPage.getChildAt(i);
if (child instanceof Folder) {
Folder folder = (Folder) child;
if (folder.getInfo().opened)
folders.add(folder);
break;
}
}
}
return folders;
}
boolean isDefaultPageShowing() {
return mCurrentPage == mDefaultPage;
}
/**
* Sets the current screen.
*
* @param currentPage
*/
@Override
void setCurrentPage(int currentPage) {
super.setCurrentPage(currentPage);
updateWallpaperOffset(mScrollX);
}
/**
* 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, mCurrentPage, 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, mCurrentPage, 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);
}
/**
* 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;
}
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.getCellLayoutChildId(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 updateOccupiedCellsForCurrentScreen(boolean[] occupied) {
CellLayout group = (CellLayout) getChildAt(mCurrentPage);
if (group != null) {
return group.updateOccupiedCells(occupied, null);
}
return null;
}
public boolean onTouch(View v, MotionEvent event) {
// this is an intercepted event being forwarded from a cell layout
if (mIsSmall) {
unshrink((CellLayout)v);
mLauncher.onWorkspaceUnshrink();
return true;
}
return false;
}
protected void pageBeginMoving() {
if (mNextPage != INVALID_PAGE) {
// we're snapping to a particular screen
enableChildrenCache(mCurrentPage, mNextPage);
} else {
// this is when user is actively dragging a particular screen, they might
// swipe it either left or right (but we won't advance by more than one screen)
enableChildrenCache(mCurrentPage - 1, mCurrentPage + 1);
}
}
protected void pageEndMoving() {
clearChildrenCache();
}
@Override
protected void notifyPageSwitchListener() {
super.notifyPageSwitchListener();
if (mPreviousIndicator != null) {
// if we know the next page, we show the indication for it right away; it looks
// weird if the indicators are lagging
int page = mNextPage;
if (page == INVALID_PAGE) {
page = mCurrentPage;
}
mPreviousIndicator.setLevel(page);
mNextIndicator.setLevel(page);
}
Launcher.setScreen(mCurrentPage);
};
private void updateWallpaperOffset() {
updateWallpaperOffset(getChildAt(getChildCount() - 1).getRight() - (mRight - mLeft));
}
private void updateWallpaperOffset(int scrollRange) {
final boolean isStaticWallpaper = (mWallpaperManager != null) &&
(mWallpaperManager.getWallpaperInfo() == null);
if (LauncherApplication.isScreenXLarge() && !isStaticWallpaper) {
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);
}
}
}
protected void onAttachedToWindow() {
super.onAttachedToWindow();
computeScroll();
mDragController.setWindowToken(getWindowToken());
}
@Override
protected void onLayout(boolean changed, int left, int top, int right, int bottom) {
super.onLayout(changed, left, top, right, bottom);
// if shrinkToBottom() is called on initialization, it has to be deferred
// until after the first call to onLayout so that it has the correct width
if (mWaitingToShrinkToBottom) {
shrinkToBottom(false);
mWaitingToShrinkToBottom = false;
}
if (LauncherApplication.isInPlaceRotationEnabled()) {
// When the device is rotated, the scroll position of the current screen
// needs to be refreshed
setCurrentPage(getCurrentPage());
}
}
@Override
protected void dispatchDraw(Canvas canvas) {
if (mIsSmall) {
// Draw all the workspaces if we're small
final int pageCount = getChildCount();
final long drawingTime = getDrawingTime();
for (int i = 0; i < pageCount; i++) {
final View page = (View) getChildAt(i);
if (page.getAlpha() != 1.0f) {
page.setAlpha(1.0f);
}
drawChild(canvas, page, drawingTime);
}
} else {
super.dispatchDraw(canvas);
}
}
@Override
protected boolean onRequestFocusInDescendants(int direction, Rect previouslyFocusedRect) {
if (!mLauncher.isAllAppsVisible()) {
final Folder openFolder = getOpenFolder();
if (openFolder != null) {
return openFolder.requestFocus(direction, previouslyFocusedRect);
} else {
return super.onRequestFocusInDescendants(direction, previouslyFocusedRect);
}
}
return false;
}
@Override
public void addFocusables(ArrayList<View> views, int direction, int focusableMode) {
if (!mLauncher.isAllAppsVisible()) {
final Folder openFolder = getOpenFolder();
if (openFolder != null) {
openFolder.addFocusables(views, direction);
} else {
super.addFocusables(views, direction, focusableMode);
}
}
}
@Override
public boolean dispatchTouchEvent(MotionEvent ev) {
if (ev.getAction() == MotionEvent.ACTION_DOWN) {
// (In XLarge mode, the workspace is shrunken below all apps, and responds to taps
// ie when you click on a mini-screen, it zooms back to that screen)
if (!LauncherApplication.isScreenXLarge() && mLauncher.isAllAppsVisible()) {
return false;
}
}
return super.dispatchTouchEvent(ev);
}
void enableChildrenCache(int fromPage, int toPage) {
if (fromPage > toPage) {
final int temp = fromPage;
fromPage = toPage;
toPage = temp;
}
final int screenCount = getChildCount();
fromPage = Math.max(fromPage, 0);
toPage = Math.min(toPage, screenCount - 1);
for (int i = fromPage; i <= toPage; i++) {
final CellLayout layout = (CellLayout) getChildAt(i);
layout.setChildrenDrawnWithCacheEnabled(true);
layout.setChildrenDrawingCacheEnabled(true);
}
}
void clearChildrenCache() {
final int screenCount = getChildCount();
for (int i = 0; i < screenCount; i++) {
final CellLayout layout = (CellLayout) getChildAt(i);
layout.setChildrenDrawnWithCacheEnabled(false);
}
}
@Override
public boolean onTouchEvent(MotionEvent ev) {
if (mLauncher.isAllAppsVisible()) {
// Cancel any scrolling that is in progress.
if (!mScroller.isFinished()) {
mScroller.abortAnimation();
}
snapToPage(mCurrentPage);
return false; // We don't want the events. Let them fall through to the all apps view.
}
return super.onTouchEvent(ev);
}
public boolean isSmall() {
return mIsSmall;
}
void shrinkToTop(boolean animated) {
shrink(ShrinkPosition.SHRINK_TO_TOP, animated);
}
void shrinkToMiddle() {
shrink(ShrinkPosition.SHRINK_TO_MIDDLE, true);
}
void shrinkToBottom() {
shrinkToBottom(true);
}
void shrinkToBottom(boolean animated) {
if (mFirstLayout) {
// (mFirstLayout == "first layout has not happened yet")
// if we get a call to shrink() as part of our initialization (for example, if
// Launcher is started in All Apps mode) then we need to wait for a layout call
// to get our width so we can layout the mini-screen views correctly
mWaitingToShrinkToBottom = true;
} else {
shrink(ShrinkPosition.SHRINK_TO_BOTTOM, animated);
}
}
// we use this to shrink the workspace for the all apps view and the customize view
private void shrink(ShrinkPosition shrinkPosition, boolean animated) {
mIsSmall = true;
final Resources res = getResources();
final int screenWidth = getWidth();
final int screenHeight = getHeight();
// Making the assumption that all pages have the same width as the 0th
final int pageWidth = getChildAt(0).getMeasuredWidth();
final int pageHeight = getChildAt(0).getMeasuredHeight();
final int scaledPageWidth = (int) (SHRINK_FACTOR * pageWidth);
final int scaledPageHeight = (int) (SHRINK_FACTOR * pageHeight);
final float scaledSpacing = res.getDimension(R.dimen.smallScreenSpacing);
final int screenCount = getChildCount();
float totalWidth = screenCount * scaledPageWidth + (screenCount - 1) * scaledSpacing;
float newY = getResources().getDimension(R.dimen.smallScreenVerticalMargin);
if (shrinkPosition == ShrinkPosition.SHRINK_TO_BOTTOM) {
newY = screenHeight - newY - scaledPageHeight;
} else if (shrinkPosition == ShrinkPosition.SHRINK_TO_MIDDLE) {
newY = screenHeight / 2 - scaledPageHeight / 2;
}
// We animate all the screens to the centered position in workspace
// At the same time, the screens become greyed/dimmed
// newX is initialized to the left-most position of the centered screens
float newX = mScroller.getFinalX() + screenWidth / 2 - totalWidth / 2;
for (int i = 0; i < screenCount; i++) {
CellLayout cl = (CellLayout) getChildAt(i);
cl.setPivotX(0.0f);
cl.setPivotY(0.0f);
if (animated) {
final int duration = res.getInteger(R.integer.config_workspaceShrinkTime);
new PropertyAnimator(duration, cl,
new PropertyValuesHolder("x", newX),
new PropertyValuesHolder("y", newY),
new PropertyValuesHolder("scaleX", SHRINK_FACTOR),
new PropertyValuesHolder("scaleY", SHRINK_FACTOR),
new PropertyValuesHolder("dimmedBitmapAlpha", 1.0f)).start();
} else {
cl.setX((int)newX);
cl.setY((int)newY);
cl.setScaleX(SHRINK_FACTOR);
cl.setScaleY(SHRINK_FACTOR);
cl.setDimmedBitmapAlpha(1.0f);
}
// increment newX for the next screen
newX += scaledPageWidth + scaledSpacing;
cl.setOnInterceptTouchListener(this);
}
setChildrenDrawnWithCacheEnabled(true);
}
// We call this when we trigger an unshrink by clicking on the CellLayout cl
private void unshrink(CellLayout clThatWasClicked) {
int newCurrentPage = mCurrentPage;
final int screenCount = getChildCount();
for (int i = 0; i < screenCount; i++) {
if (getChildAt(i) == clThatWasClicked) {
newCurrentPage = i;
}
}
unshrink(newCurrentPage);
}
private void unshrink(int newCurrentPage) {
if (mIsSmall) {
int delta = (newCurrentPage - mCurrentPage)*getWidth();
final int screenCount = getChildCount();
for (int i = 0; i < screenCount; i++) {
CellLayout cl = (CellLayout) getChildAt(i);
cl.setX(cl.getX() + delta);
}
snapToPage(newCurrentPage);
unshrink();
setCurrentPage(newCurrentPage);
}
}
void unshrink() {
unshrink(true);
}
void unshrink(boolean animated) {
if (mIsSmall) {
Sequencer s = new Sequencer();
final int screenCount = getChildCount();
final int duration = getResources().getInteger(R.integer.config_workspaceUnshrinkTime);
for (int i = 0; i < screenCount; i++) {
final CellLayout cl = (CellLayout)getChildAt(i);
cl.setPivotX(0.0f);
cl.setPivotY(0.0f);
if (animated) {
s.playTogether(
new PropertyAnimator<Float>(duration, cl, "translationX", 0.0f),
new PropertyAnimator<Float>(duration, cl, "translationY", 0.0f),
new PropertyAnimator<Float>(duration, cl, "scaleX", 1.0f),
new PropertyAnimator<Float>(duration, cl, "scaleY", 1.0f),
new PropertyAnimator<Float>(duration, cl, "dimmedBitmapAlpha", 0.0f));
} else {
cl.setTranslationX(0.0f);
cl.setTranslationY(0.0f);
cl.setScaleX(1.0f);
cl.setScaleY(1.0f);
cl.setDimmedBitmapAlpha(0.0f);
}
}
s.addListener(mUnshrinkAnimationListener);
s.start();
}
}
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 = mCurrentPage;
CellLayout current = ((CellLayout) getChildAt(mCurrentPage));
current.onDragChild(child);
mDragController.startDrag(child, this, child.getTag(), DragController.DRAG_ACTION_MOVE);
invalidate();
}
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) {
CellLayout cellLayout = getCurrentDropLayout();
int originX = x - xOffset;
int originY = y - yOffset;
if (mIsSmall) {
// find out which target layout is over
final float[] localXY = mTempDragCoordinates;
localXY[0] = originX;
localXY[1] = originY;
final float[] localBottomRightXY = mTempDragBottomRightCoordinates;
// we need to subtract left/top here because DragController already adds
// dragRegionLeft/Top to xOffset and yOffset
localBottomRightXY[0] = originX + dragView.getDragRegionWidth();
localBottomRightXY[1] = originY + dragView.getDragRegionHeight();
cellLayout = findMatchingPageForDragOver(localXY, localBottomRightXY);
if (cellLayout == null) {
// cancel the drag if we're not over a mini-screen at time of drop
// TODO: maybe add a nice fade here?
return;
}
// localXY will be transformed into the local screen's coordinate space; save that info
originX = (int)localXY[0];
originY = (int)localXY[1];
}
if (source != this) {
onDropExternal(originX, originY, dragInfo, cellLayout);
} else {
// Move internally
if (mDragInfo != null) {
final View cell = mDragInfo.cell;
int index = mScroller.isFinished() ? mCurrentPage : mNextPage;
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(originX, originY,
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) {
}
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;
}
// xy = upper left corner of item being dragged
// bottomRightXy = lower right corner of item being dragged
// This method will see which mini-screen is most overlapped by the item being dragged, and
// return it. It will also transform the parameters xy and bottomRightXy into the local
// coordinate space of the returned screen
private CellLayout findMatchingPageForDragOver(float[] xy, float[] bottomRightXy) {
float x = xy[0];
float y = xy[1];
float right = bottomRightXy[0];
float bottom = bottomRightXy[1];
float bestX = 0;
float bestY = 0;
float bestRight = 0;
float bestBottom = 0;
Matrix inverseMatrix = new Matrix();
// We loop through all the screens (ie CellLayouts) and see which one overlaps the most
// with the item being dragged.
final int screenCount = getChildCount();
CellLayout bestMatchingScreen = null;
float bestOverlapSoFar = 0;
for (int i = 0; i < screenCount; i++) {
CellLayout cl = (CellLayout)getChildAt(i);
// Transform the coordinates of the item being dragged to the CellLayout's coordinates
float left = cl.getLeft();
float top = cl.getTop();
xy[0] = x + mScrollX - left;
xy[1] = y + mScrollY - top;
cl.getMatrix().invert(inverseMatrix);
bottomRightXy[0] = right + mScrollX - left;
bottomRightXy[1] = bottom + mScrollY - top;
inverseMatrix.mapPoints(xy);
inverseMatrix.mapPoints(bottomRightXy);
float dragRegionX = xy[0];
float dragRegionY = xy[1];
float dragRegionRight = bottomRightXy[0];
float dragRegionBottom = bottomRightXy[1];
// Find the overlapping region
float overlapLeft = Math.max(0f, dragRegionX);
float overlapTop = Math.max(0f, dragRegionY);
float overlapBottom = Math.min(cl.getHeight(), dragRegionBottom);
float overlapRight = Math.min(cl.getWidth(), dragRegionRight);
if (overlapRight >= 0 && overlapLeft <= cl.getWidth() &&
overlapTop >= 0 && overlapBottom <= cl.getHeight()) {
// Calculate the size of the overlapping region
float overlap = (overlapRight - overlapLeft) * (overlapBottom - overlapTop);
if (overlap > bestOverlapSoFar) {
bestOverlapSoFar = overlap;
bestMatchingScreen = cl;
bestX = xy[0];
bestY = xy[1];
bestRight = bottomRightXy[0];
bestBottom = bottomRightXy[1];
}
}
}
if (bestMatchingScreen != null && bestMatchingScreen != mDragTargetLayout) {
if (mDragTargetLayout != null) {
mDragTargetLayout.onDragComplete();
}
mDragTargetLayout = bestMatchingScreen;
}
xy[0] = bestX;
xy[1] = bestY;
bottomRightXy[0] = bestRight;
bottomRightXy[1] = bestBottom;
return bestMatchingScreen;
}
public void onDragOver(DragSource source, int x, int y, int xOffset, int yOffset,
DragView dragView, Object dragInfo) {
final 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, null);
item.spanX = spans[0];
item.spanY = spans[1];
}
}
int originX = x - xOffset;
int originY = y - yOffset;
if (mIsSmall) {
// find out which mini screen the dragged item is over
final float[] localXY = mTempDragCoordinates;
localXY[0] = originX;
localXY[1] = originY;
final float[] localBottomRightXY = mTempDragBottomRightCoordinates;
localBottomRightXY[0] = originX + dragView.getDragRegionWidth();
localBottomRightXY[1] = originY + dragView.getDragRegionHeight();
currentLayout = findMatchingPageForDragOver(localXY, localBottomRightXY);
if (currentLayout != null) {
currentLayout.setHover(true);
}
originX = (int)localXY[0];
originY = (int)localXY[1];
}
if (source != this) {
// This is a hack to fix the point used to determine which cell an icon from the all
// apps screen is over
if (item != null && item.spanX == 1 && currentLayout != null) {
int dragRegionLeft = (dragView.getWidth() - currentLayout.getCellWidth()) / 2;
originX += dragRegionLeft - dragView.getDragRegionLeft();
if (dragView.getDragRegionWidth() != currentLayout.getCellWidth()) {
dragView.setDragRegion(dragView.getDragRegionLeft(), dragView.getDragRegionTop(),
currentLayout.getCellWidth(), dragView.getDragRegionHeight());
}
}
}
if (currentLayout != mDragTargetLayout) {
if (mDragTargetLayout != null) {
mDragTargetLayout.onDragComplete();
}
mDragTargetLayout = currentLayout;
}
// only visualize the drop locations for moving icons within the home screen on tablet
// on phone, we also visualize icons dragged in from All Apps
if ((!LauncherApplication.isScreenXLarge() || source == this)
&& mDragTargetLayout != null) {
final View child = (mDragInfo == null) ? null : mDragInfo.cell;
mDragTargetLayout.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) {
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(mCurrentPage),
((UserFolderInfo) info));
break;
case LauncherSettings.Favorites.ITEM_TYPE_APPWIDGET:
cellLayout.setTagToCellInfoForPoint(x, y);
int[] position = new int[2];
position[0] = x;
position[1] = y;
mLauncher.addAppWidgetFromDrop(((LauncherAppWidgetInfo)dragInfo).providerName,
cellLayout.getTag(), position);
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, mCurrentPage,
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() ? mCurrentPage : mNextPage;
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 dragCellInfo = mDragInfo;
final int spanX = dragCellInfo == null ? 1 : dragCellInfo.spanX;
final int spanY = dragCellInfo == null ? 1 : dragCellInfo.spanY;
final View ignoreView = dragCellInfo == null ? null : dragCellInfo.cell;
final CellLayout.CellInfo cellInfo = layout.updateOccupiedCells(null, ignoreView);
if (cellInfo.findCellForSpan(mTempEstimate, spanX, spanY)) {
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);
final CellLayout.CellInfo cellInfo = layout.updateOccupiedCells(null, ignoreView);
// Find the best target drop location
return layout.findNearestVacantArea(mTempEstimate[0], mTempEstimate[1], spanX, spanY, cellInfo, recycle);
}
/**
* Estimate the size that a child with the given dimensions will take in the current screen.
*/
void estimateChildSize(int minWidth, int minHeight, int[] result) {
((CellLayout)getChildAt(mCurrentPage)).estimateChildSize(minWidth, minHeight, result);
}
void setLauncher(Launcher launcher) {
mLauncher = launcher;
}
public void setDragController(DragController dragController) {
mDragController = dragController;
}
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);
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;
}
@Override
protected void onRestoreInstanceState(Parcelable state) {
super.onRestoreInstanceState(state);
Launcher.setScreen(mCurrentPage);
}
@Override
public void scrollLeft() {
if (!mIsSmall) {
super.scrollLeft();
}
}
@Override
public void scrollRight() {
if (!mIsSmall) {
super.scrollRight();
}
}
public Folder getFolderForTag(Object tag) {
final 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;
}
void removeItems(final ArrayList<ApplicationInfo> apps) {
final int screenCount = getChildCount();
final PackageManager manager = getContext().getPackageManager();
final AppWidgetManager widgets = AppWidgetManager.getInstance(getContext());
final HashSet<String> packageNames = new HashSet<String>();
final int appCount = apps.size();
for (int i = 0; i < appCount; i++) {
packageNames.add(apps.get(i).componentName.getPackageName());
}
for (int i = 0; i < screenCount; i++) {
final CellLayout layout = (CellLayout) getChildAt(i);
// Avoid ANRs by treating each screen separately
post(new Runnable() {
public void run() {
final ArrayList<View> childrenToRemove = new ArrayList<View>();
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<ShortcutInfo> contents = info.contents;
final ArrayList<ShortcutInfo> toRemove = new ArrayList<ShortcutInfo>(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<ApplicationInfo> apps) {
final PackageManager pm = mLauncher.getPackageManager();
final int screenCount = getChildCount();
for (int i = 0; i < screenCount; 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) {
if (mIsSmall) {
unshrink(mDefaultPage);
} else {
snapToPage(mDefaultPage);
}
} else {
setCurrentPage(mDefaultPage);
}
getChildAt(mDefaultPage).requestFocus();
}
void setIndicators(Drawable previous, Drawable next) {
mPreviousIndicator = previous;
mNextIndicator = next;
previous.setLevel(mCurrentPage);
next.setLevel(mCurrentPage);
}
@Override
public void syncPages() {
}
@Override
public void syncPageItems(int page) {
}
}