src/com/android/launcher2/AllAppsPagedView.java - fp2-dev/platform/packages/apps/Launcher2 - Gitiles

 /*
  * Copyright (C) 2010 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.content.ComponentName;
 import android.content.Context;
 import android.content.res.Resources;
 import android.content.res.TypedArray;
 import android.graphics.Bitmap;
 import android.graphics.Canvas;
 import android.graphics.drawable.Drawable;
 import android.util.AttributeSet;
 import android.view.LayoutInflater;
 import android.view.View;
 import android.view.animation.AnimationUtils;
 import android.widget.Checkable;
 import android.widget.TextView;

 import java.util.ArrayList;
 import java.util.Collections;
 import java.util.HashSet;

 /**
  * An implementation of PagedView that populates the pages of the workspace
  * with all of the user's applications.
  */
 public class AllAppsPagedView extends PagedViewWithDraggableItems implements AllAppsView,
     View.OnClickListener, DragSource, DropTarget {

     private static final String TAG = "AllAppsPagedView";

     private Launcher mLauncher;
     private DragController mDragController;

     // preserve compatibility with 3D all apps:
     //    0.0 -> hidden
     //    1.0 -> shown and opaque
     //    intermediate values -> partially shown & partially opaque
     private float mZoom;

     // set of all applications
     private ArrayList<ApplicationInfo> mApps;
     private ArrayList<ApplicationInfo> mFilteredApps;

     // the types of applications to filter
     static final int ALL_APPS_FLAG = -1;
     private int mAppFilter = ALL_APPS_FLAG;

     private final LayoutInflater mInflater;


     public AllAppsPagedView(Context context) {
         this(context, null);
     }

     public AllAppsPagedView(Context context, AttributeSet attrs) {
         this(context, attrs, 0);
     }

     public AllAppsPagedView(Context context, AttributeSet attrs, int defStyle) {
         super(context, attrs, defStyle);
         TypedArray a = context.obtainStyledAttributes(attrs, R.styleable.PagedView, defStyle, 0);
         mCellCountX = a.getInt(R.styleable.PagedView_cellCountX, 6);
         mCellCountY = a.getInt(R.styleable.PagedView_cellCountY, 4);
         mInflater = LayoutInflater.from(context);
         a.recycle();
         setSoundEffectsEnabled(false);

         Resources r = context.getResources();
         setDragSlopeThreshold(
                 r.getInteger(R.integer.config_allAppsDrawerDragSlopeThreshold) / 100.0f);
     }

     @Override
     protected void init() {
         super.init();
         mCenterPagesVertically = false;
     }

     @Override
     public void setLauncher(Launcher launcher) {
         mLauncher = launcher;
         mLauncher.setAllAppsPagedView(this);
     }

     @Override
     public void setDragController(DragController dragger) {
         mDragController = dragger;
     }

     public void setAppFilter(int filterType) {
         mAppFilter = filterType;
         if (mApps != null) {
             mFilteredApps = rebuildFilteredApps(mApps);
             setCurrentPage(0);
             invalidatePageData();
         }
     }

     @Override
     public void zoom(float zoom, boolean animate) {
         mZoom = zoom;
         cancelLongPress();

         if (isVisible()) {
             getParent().bringChildToFront(this);
             setVisibility(View.VISIBLE);
             if (animate) {
                 startAnimation(AnimationUtils.loadAnimation(getContext(),
                         R.anim.all_apps_2d_fade_in));
             } else {
                 onAnimationEnd();
             }
         } else {
             if (animate) {
                 startAnimation(AnimationUtils.loadAnimation(getContext(),
                         R.anim.all_apps_2d_fade_out));
             } else {
                 onAnimationEnd();
             }
         }
     }

     protected void onAnimationEnd() {
         if (!isVisible()) {
             setVisibility(View.GONE);
             mZoom = 0.0f;

             endChoiceMode();
         } else {
             mZoom = 1.0f;
         }

         if (mLauncher != null)
             mLauncher.zoomed(mZoom);
     }

     private int getChildIndexForGrandChild(View v) {
         final int childCount = getChildCount();
         for (int i = 0; i < childCount; ++i) {
             final PagedViewCellLayout layout = (PagedViewCellLayout) getChildAt(i);
             if (layout.indexOfChild(v) > -1) {
                 return i;
             }
         }
         return -1;
     }

     @Override
     public void onClick(View v) {
         // if we are already in a choice mode, then just change the selection
         if (v instanceof Checkable) {
             if (!isChoiceMode(CHOICE_MODE_NONE)) {
                 Checkable c = (Checkable) v;
                 if (isChoiceMode(CHOICE_MODE_SINGLE)) {
                     // Uncheck all the other grandchildren, and toggle the clicked one
                     boolean wasChecked = c.isChecked();
                     resetCheckedGrandchildren();
                     c.setChecked(!wasChecked);
                 } else {
                     c.toggle();
                 }
                 if (getCheckedGrandchildren().size() == 0) {
                     endChoiceMode();
                 }

                 return;
             }
         }

         // otherwise continue and launch the application
         int childIndex = getChildIndexForGrandChild(v);
         if (childIndex == getCurrentPage()) {
             final ApplicationInfo app = (ApplicationInfo) v.getTag();

             // animate some feedback to the click
             animateClickFeedback(v, new Runnable() {
                 @Override
                 public void run() {
                     mLauncher.startActivitySafely(app.intent, app);
                 }
             });

             endChoiceMode();
         }
     }

     private void setupDragMode() {
         mLauncher.getWorkspace().shrink(Workspace.ShrinkState.BOTTOM_VISIBLE);
         DeleteZone allAppsDeleteZone = (DeleteZone)
                 mLauncher.findViewById(R.id.all_apps_delete_zone);
         allAppsDeleteZone.setDragAndDropEnabled(true);

         ApplicationInfoDropTarget allAppsInfoButton =
                 (ApplicationInfoDropTarget) mLauncher.findViewById(R.id.all_apps_info_target);
         allAppsInfoButton.setDragAndDropEnabled(true);
     }

     private void tearDownDragMode() {
         post(new Runnable() {
             // Once the drag operation has fully completed, hence the post, we want to disable the
             // deleteZone and the appInfoButton in all apps, and re-enable the instance which
             // live in the workspace
             public void run() {
                 DeleteZone allAppsDeleteZone =
                         (DeleteZone) mLauncher.findViewById(R.id.all_apps_delete_zone);
                 // if onDestroy was called on Launcher, we might have already deleted the
                 // all apps delete zone / info button, so check if they are null
                 if (allAppsDeleteZone != null) allAppsDeleteZone.setDragAndDropEnabled(false);

                 ApplicationInfoDropTarget allAppsInfoButton =
                     (ApplicationInfoDropTarget) mLauncher.findViewById(R.id.all_apps_info_target);
                 if (allAppsInfoButton != null) allAppsInfoButton.setDragAndDropEnabled(false);
             }
         });
         resetCheckedGrandchildren();
         mDragController.removeDropTarget(this);
     }

     @Override
     protected boolean beginDragging(View v) {
         if (!v.isInTouchMode()) return false;
         if (!super.beginDragging(v)) return false;

         // Start drag mode after the item is selected
         setupDragMode();

         ApplicationInfo app = (ApplicationInfo) v.getTag();
         app = new ApplicationInfo(app);

         // get icon (top compound drawable, index is 1)
         final TextView tv = (TextView) v;
         final Drawable icon = tv.getCompoundDrawables()[1];
         Bitmap b = Bitmap.createBitmap(v.getWidth(), v.getHeight(),
                 Bitmap.Config.ARGB_8888);
         Canvas c = new Canvas(b);
         c.translate((v.getWidth() - icon.getIntrinsicWidth()) / 2, v.getPaddingTop());
         icon.draw(c);

         // We toggle the checked state _after_ we create the view for the drag in case toggling the
         // checked state changes the view's look
         if (v instanceof Checkable) {
             // In preparation for drag, we always reset the checked grand children regardless of
             // what choice mode we are in
             resetCheckedGrandchildren();

             // Toggle the selection on the dragged app
             Checkable checkable = (Checkable) v;

             // Note: we toggle the checkable state to actually cause an alpha fade for the duration
             // of the drag of the item.  (The fade-in will occur when all checked states are
             // disabled when dragging ends)
             checkable.toggle();
         }

         // Start the drag
         mLauncher.lockScreenOrientation();
         mLauncher.getWorkspace().onDragStartedWithItemSpans(1, 1, b);
         mDragController.startDrag(v, b, this, app, DragController.DRAG_ACTION_COPY, null);
         b.recycle();
         return true;
     }

     @Override
     public void onDragViewVisible() {
     }

     @Override
     public void onDropCompleted(View target, boolean success) {
         // close the choice action mode if we have a proper drop
         if (target != this) {
             endChoiceMode();
         }
         tearDownDragMode();
         mLauncher.getWorkspace().onDragStopped(success);
         mLauncher.unlockScreenOrientation();
     }

     @Override
     public boolean isVisible() {
         return mZoom > 0.001f;
     }

     @Override
     public boolean isAnimating() {
         return (getAnimation() != null);
     }

     private ArrayList<ApplicationInfo> rebuildFilteredApps(ArrayList<ApplicationInfo> apps) {
         ArrayList<ApplicationInfo> filteredApps = new ArrayList<ApplicationInfo>();
         if (mAppFilter == ALL_APPS_FLAG) {
             return apps;
         } else {
             final int length = apps.size();
             for (int i = 0; i < length; ++i) {
                 ApplicationInfo info = apps.get(i);
                 if ((info.flags & mAppFilter) > 0) {
                     filteredApps.add(info);
                 }
             }
             Collections.sort(filteredApps, LauncherModel.APP_INSTALL_TIME_COMPARATOR);
         }
         return filteredApps;
     }

     @Override
     public void setApps(ArrayList<ApplicationInfo> list) {
         mApps = list;
         Collections.sort(mApps, LauncherModel.APP_NAME_COMPARATOR);
         mFilteredApps = rebuildFilteredApps(mApps);
         mPageViewIconCache.retainAllApps(list);
         invalidatePageData();
     }

     private void addAppsWithoutInvalidate(ArrayList<ApplicationInfo> list) {
         // we add it in place, in alphabetical order
         final int count = list.size();
         for (int i = 0; i < count; ++i) {
             final ApplicationInfo info = list.get(i);
             final int index = Collections.binarySearch(mApps, info, LauncherModel.APP_NAME_COMPARATOR);
             if (index < 0) {
                 mApps.add(-(index + 1), info);
             } else {
                 mApps.add(index, info);
             }
         }
         mFilteredApps = rebuildFilteredApps(mApps);
     }
     @Override
     public void addApps(ArrayList<ApplicationInfo> list) {
         addAppsWithoutInvalidate(list);
         invalidatePageData();
     }

     private void removeAppsWithoutInvalidate(ArrayList<ApplicationInfo> list) {
         // End the choice mode if any of the items in the list that are being removed are
         // currently selected
         ArrayList<Checkable> checkedList = getCheckedGrandchildren();
         HashSet<ApplicationInfo> checkedAppInfos = new HashSet<ApplicationInfo>();
         for (Checkable checked : checkedList) {
             PagedViewIcon icon = (PagedViewIcon) checked;
             checkedAppInfos.add((ApplicationInfo) icon.getTag());
         }
         for (ApplicationInfo info : list) {
             if (checkedAppInfos.contains(info)) {
                 endChoiceMode();
                 break;
             }
         }

         // Loop through all the apps and remove apps that have the same component
         final int length = list.size();
         for (int i = 0; i < length; ++i) {
             final ApplicationInfo info = list.get(i);
             int removeIndex = findAppByComponent(mApps, info);
             if (removeIndex > -1) {
                 mApps.remove(removeIndex);
                 mPageViewIconCache.removeOutline(new PagedViewIconCache.Key(info));
             }
         }
         mFilteredApps = rebuildFilteredApps(mApps);
     }
     @Override
     public void removeApps(ArrayList<ApplicationInfo> list) {
         removeAppsWithoutInvalidate(list);
         invalidatePageData();
     }

     @Override
     public void updateApps(ArrayList<ApplicationInfo> list) {
         removeAppsWithoutInvalidate(list);
         addAppsWithoutInvalidate(list);
         invalidatePageData();
     }

     private int findAppByComponent(ArrayList<ApplicationInfo> list, ApplicationInfo item) {
         ComponentName removeComponent = item.intent.getComponent();
         final int length = list.size();
         for (int i = 0; i < length; ++i) {
             ApplicationInfo info = list.get(i);
             if (info.intent.getComponent().equals(removeComponent)) {
                 return i;
             }
         }
         return -1;
     }

     @Override
     public void dumpState() {
         ApplicationInfo.dumpApplicationInfoList(TAG, "mApps", mApps);
     }

     @Override
     public void surrender() {
         // do nothing?
     }

     @Override
     public void syncPages() {
         // ensure that we have the right number of pages (min of 1, since we have placeholders)
         int numPages = Math.max(1,
                 (int) Math.ceil((float) mFilteredApps.size() / (mCellCountX * mCellCountY)));
         int curNumPages = getChildCount();
         // remove any extra pages after the "last" page
         int extraPageDiff = curNumPages - numPages;
         for (int i = 0; i < extraPageDiff; ++i) {
             removeViewAt(numPages);
         }
         // add any necessary pages
         for (int i = curNumPages; i < numPages; ++i) {
             PagedViewCellLayout layout = new PagedViewCellLayout(getContext());
             layout.setCellCount(mCellCountX, mCellCountY);
             layout.setPadding(mPageLayoutPaddingLeft, mPageLayoutPaddingTop,
                     mPageLayoutPaddingRight, mPageLayoutPaddingBottom);
             layout.setGap(mPageLayoutWidthGap, mPageLayoutHeightGap);
             addView(layout);
         }

         // bound the current page
         setCurrentPage(Math.max(0, Math.min(numPages - 1, getCurrentPage())));
     }

     @Override
     public void syncPageItems(int page) {
         // Ensure that we have the right number of items on the pages
         final int cellsPerPage = mCellCountX * mCellCountY;
         final int startIndex = page * cellsPerPage;
         final int endIndex = Math.min(startIndex + cellsPerPage, mFilteredApps.size());
         PagedViewCellLayout layout = (PagedViewCellLayout) getChildAt(page);

         if (!mFilteredApps.isEmpty()) {
             int curNumPageItems = layout.getChildCount();
             int numPageItems = endIndex - startIndex;

             // If we were previously an empty page, then restart anew
             boolean wasEmptyPage = false;
             if (curNumPageItems == 1) {
                 View icon = layout.getChildAt(0);
                 if (icon.getTag() == null) {
                     wasEmptyPage = true;
                 }
             }

             if (wasEmptyPage) {
                 // Remove all the previous items
                 curNumPageItems = 0;
                 layout.removeAllViews();
             } else {
                 // Remove any extra items
                 int extraPageItemsDiff = curNumPageItems - numPageItems;
                 for (int i = 0; i < extraPageItemsDiff; ++i) {
                     layout.removeViewAt(numPageItems);
                 }
             }

             // Add any necessary items
             for (int i = curNumPageItems; i < numPageItems; ++i) {
                 TextView text = (TextView) mInflater.inflate(
                         R.layout.all_apps_paged_view_application, layout, false);
                 text.setOnClickListener(this);
                 text.setOnLongClickListener(this);
                 text.setOnTouchListener(this);

                 layout.addViewToCellLayout(text, -1, i,
                     new PagedViewCellLayout.LayoutParams(0, 0, 1, 1));
             }

             // Actually reapply to the existing text views
             final int numPages = getPageCount();
             for (int i = startIndex; i < endIndex; ++i) {
                 final int index = i - startIndex;
                 final ApplicationInfo info = mFilteredApps.get(i);
                 PagedViewIcon icon = (PagedViewIcon) layout.getChildAt(index);
                 icon.applyFromApplicationInfo(info, mPageViewIconCache, true, (numPages > 1));

                 PagedViewCellLayout.LayoutParams params =
                     (PagedViewCellLayout.LayoutParams) icon.getLayoutParams();
                 params.cellX = index % mCellCountX;
                 params.cellY = index / mCellCountX;
             }

             // Default to left-aligned icons
             layout.enableCenteredContent(false);
         } else {
             // There are no items, so show the user a small message
             TextView icon = (TextView) mInflater.inflate(
                     R.layout.all_apps_no_items_placeholder, layout, false);
             switch (mAppFilter) {
             case ApplicationInfo.DOWNLOADED_FLAG:
                 icon.setText(mContext.getString(R.string.all_apps_no_downloads));
                 break;
             default: break;
             }

             // Center-align the message
             layout.enableCenteredContent(true);
             layout.removeAllViews();
             layout.addViewToCellLayout(icon, -1, 0,
                     new PagedViewCellLayout.LayoutParams(0, 0, 4, 1));
         }
     }

     /*
      * We don't actually use AllAppsPagedView as a drop target... it's only used to intercept a drop
      * to the workspace.
      */
     @Override
     public boolean acceptDrop(DragSource source, int x, int y, int xOffset, int yOffset,
             DragView dragView, Object dragInfo) {
         return false;
     }
     @Override
     public DropTarget getDropTargetDelegate(DragSource source, int x, int y, int xOffset,
             int yOffset, DragView dragView, Object dragInfo) {
         return null;
     }
     @Override
     public void onDragEnter(DragSource source, int x, int y, int xOffset, int yOffset,
             DragView dragView, Object dragInfo) {}
     @Override
     public void onDragExit(DragSource source, int x, int y, int xOffset, int yOffset,
             DragView dragView, Object dragInfo) {}
     @Override
     public void onDragOver(DragSource source, int x, int y, int xOffset, int yOffset,
             DragView dragView, Object dragInfo) {}
     @Override
     public void onDrop(DragSource source, int x, int y, int xOffset, int yOffset,
             DragView dragView, Object dragInfo) {}

     public boolean isDropEnabled() {
         return true;
     }
 }
	/*
	* Copyright (C) 2010 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.content.ComponentName;
	import android.content.Context;
	import android.content.res.Resources;
	import android.content.res.TypedArray;
	import android.graphics.Bitmap;
	import android.graphics.Canvas;
	import android.graphics.drawable.Drawable;
	import android.util.AttributeSet;
	import android.view.LayoutInflater;
	import android.view.View;
	import android.view.animation.AnimationUtils;
	import android.widget.Checkable;
	import android.widget.TextView;

	import java.util.ArrayList;
	import java.util.Collections;
	import java.util.HashSet;

	/**
	* An implementation of PagedView that populates the pages of the workspace
	* with all of the user's applications.
	*/
	public class AllAppsPagedView extends PagedViewWithDraggableItems implements AllAppsView,
	View.OnClickListener, DragSource, DropTarget {

	private static final String TAG = "AllAppsPagedView";

	private Launcher mLauncher;
	private DragController mDragController;

	// preserve compatibility with 3D all apps:
	// 0.0 -> hidden
	// 1.0 -> shown and opaque
	// intermediate values -> partially shown & partially opaque
	private float mZoom;

	// set of all applications
	private ArrayList<ApplicationInfo> mApps;
	private ArrayList<ApplicationInfo> mFilteredApps;

	// the types of applications to filter
	static final int ALL_APPS_FLAG = -1;
	private int mAppFilter = ALL_APPS_FLAG;

	private final LayoutInflater mInflater;


	public AllAppsPagedView(Context context) {
	this(context, null);
	}

	public AllAppsPagedView(Context context, AttributeSet attrs) {
	this(context, attrs, 0);
	}

	public AllAppsPagedView(Context context, AttributeSet attrs, int defStyle) {
	super(context, attrs, defStyle);
	TypedArray a = context.obtainStyledAttributes(attrs, R.styleable.PagedView, defStyle, 0);
	mCellCountX = a.getInt(R.styleable.PagedView_cellCountX, 6);
	mCellCountY = a.getInt(R.styleable.PagedView_cellCountY, 4);
	mInflater = LayoutInflater.from(context);
	a.recycle();
	setSoundEffectsEnabled(false);

	Resources r = context.getResources();
	setDragSlopeThreshold(
	r.getInteger(R.integer.config_allAppsDrawerDragSlopeThreshold) / 100.0f);
	}

	@Override
	protected void init() {
	super.init();
	mCenterPagesVertically = false;
	}

	@Override
	public void setLauncher(Launcher launcher) {
	mLauncher = launcher;
	mLauncher.setAllAppsPagedView(this);
	}

	@Override
	public void setDragController(DragController dragger) {
	mDragController = dragger;
	}

	public void setAppFilter(int filterType) {
	mAppFilter = filterType;
	if (mApps != null) {
	mFilteredApps = rebuildFilteredApps(mApps);
	setCurrentPage(0);
	invalidatePageData();
	}
	}

	@Override
	public void zoom(float zoom, boolean animate) {
	mZoom = zoom;
	cancelLongPress();

	if (isVisible()) {
	getParent().bringChildToFront(this);
	setVisibility(View.VISIBLE);
	if (animate) {
	startAnimation(AnimationUtils.loadAnimation(getContext(),
	R.anim.all_apps_2d_fade_in));
	} else {
	onAnimationEnd();
	}
	} else {
	if (animate) {
	startAnimation(AnimationUtils.loadAnimation(getContext(),
	R.anim.all_apps_2d_fade_out));
	} else {
	onAnimationEnd();
	}
	}
	}

	protected void onAnimationEnd() {
	if (!isVisible()) {
	setVisibility(View.GONE);
	mZoom = 0.0f;

	endChoiceMode();
	} else {
	mZoom = 1.0f;
	}

	if (mLauncher != null)
	mLauncher.zoomed(mZoom);
	}

	private int getChildIndexForGrandChild(View v) {
	final int childCount = getChildCount();
	for (int i = 0; i < childCount; ++i) {
	final PagedViewCellLayout layout = (PagedViewCellLayout) getChildAt(i);
	if (layout.indexOfChild(v) > -1) {
	return i;
	}
	}
	return -1;
	}

	@Override
	public void onClick(View v) {
	// if we are already in a choice mode, then just change the selection
	if (v instanceof Checkable) {
	if (!isChoiceMode(CHOICE_MODE_NONE)) {
	Checkable c = (Checkable) v;
	if (isChoiceMode(CHOICE_MODE_SINGLE)) {
	// Uncheck all the other grandchildren, and toggle the clicked one
	boolean wasChecked = c.isChecked();
	resetCheckedGrandchildren();
	c.setChecked(!wasChecked);
	} else {
	c.toggle();
	}
	if (getCheckedGrandchildren().size() == 0) {
	endChoiceMode();
	}

	return;
	}
	}

	// otherwise continue and launch the application
	int childIndex = getChildIndexForGrandChild(v);
	if (childIndex == getCurrentPage()) {
	final ApplicationInfo app = (ApplicationInfo) v.getTag();

	// animate some feedback to the click
	animateClickFeedback(v, new Runnable() {
	@Override
	public void run() {
	mLauncher.startActivitySafely(app.intent, app);
	}
	});

	endChoiceMode();
	}
	}

	private void setupDragMode() {
	mLauncher.getWorkspace().shrink(Workspace.ShrinkState.BOTTOM_VISIBLE);
	DeleteZone allAppsDeleteZone = (DeleteZone)
	mLauncher.findViewById(R.id.all_apps_delete_zone);
	allAppsDeleteZone.setDragAndDropEnabled(true);

	ApplicationInfoDropTarget allAppsInfoButton =
	(ApplicationInfoDropTarget) mLauncher.findViewById(R.id.all_apps_info_target);
	allAppsInfoButton.setDragAndDropEnabled(true);
	}

	private void tearDownDragMode() {
	post(new Runnable() {
	// Once the drag operation has fully completed, hence the post, we want to disable the
	// deleteZone and the appInfoButton in all apps, and re-enable the instance which
	// live in the workspace
	public void run() {
	DeleteZone allAppsDeleteZone =
	(DeleteZone) mLauncher.findViewById(R.id.all_apps_delete_zone);
	// if onDestroy was called on Launcher, we might have already deleted the
	// all apps delete zone / info button, so check if they are null
	if (allAppsDeleteZone != null) allAppsDeleteZone.setDragAndDropEnabled(false);

	ApplicationInfoDropTarget allAppsInfoButton =
	(ApplicationInfoDropTarget) mLauncher.findViewById(R.id.all_apps_info_target);
	if (allAppsInfoButton != null) allAppsInfoButton.setDragAndDropEnabled(false);
	}
	});
	resetCheckedGrandchildren();
	mDragController.removeDropTarget(this);
	}

	@Override
	protected boolean beginDragging(View v) {
	if (!v.isInTouchMode()) return false;
	if (!super.beginDragging(v)) return false;

	// Start drag mode after the item is selected
	setupDragMode();

	ApplicationInfo app = (ApplicationInfo) v.getTag();
	app = new ApplicationInfo(app);

	// get icon (top compound drawable, index is 1)
	final TextView tv = (TextView) v;
	final Drawable icon = tv.getCompoundDrawables()[1];
	Bitmap b = Bitmap.createBitmap(v.getWidth(), v.getHeight(),
	Bitmap.Config.ARGB_8888);
	Canvas c = new Canvas(b);
	c.translate((v.getWidth() - icon.getIntrinsicWidth()) / 2, v.getPaddingTop());
	icon.draw(c);

	// We toggle the checked state _after_ we create the view for the drag in case toggling the
	// checked state changes the view's look
	if (v instanceof Checkable) {
	// In preparation for drag, we always reset the checked grand children regardless of
	// what choice mode we are in
	resetCheckedGrandchildren();

	// Toggle the selection on the dragged app
	Checkable checkable = (Checkable) v;

	// Note: we toggle the checkable state to actually cause an alpha fade for the duration
	// of the drag of the item. (The fade-in will occur when all checked states are
	// disabled when dragging ends)
	checkable.toggle();
	}

	// Start the drag
	mLauncher.lockScreenOrientation();
	mLauncher.getWorkspace().onDragStartedWithItemSpans(1, 1, b);
	mDragController.startDrag(v, b, this, app, DragController.DRAG_ACTION_COPY, null);
	b.recycle();
	return true;
	}

	@Override
	public void onDragViewVisible() {
	}

	@Override
	public void onDropCompleted(View target, boolean success) {
	// close the choice action mode if we have a proper drop
	if (target != this) {
	endChoiceMode();
	}
	tearDownDragMode();
	mLauncher.getWorkspace().onDragStopped(success);
	mLauncher.unlockScreenOrientation();
	}

	@Override
	public boolean isVisible() {
	return mZoom > 0.001f;
	}

	@Override
	public boolean isAnimating() {
	return (getAnimation() != null);
	}

	private ArrayList<ApplicationInfo> rebuildFilteredApps(ArrayList<ApplicationInfo> apps) {
	ArrayList<ApplicationInfo> filteredApps = new ArrayList<ApplicationInfo>();
	if (mAppFilter == ALL_APPS_FLAG) {
	return apps;
	} else {
	final int length = apps.size();
	for (int i = 0; i < length; ++i) {
	ApplicationInfo info = apps.get(i);
	if ((info.flags & mAppFilter) > 0) {
	filteredApps.add(info);
	}
	}
	Collections.sort(filteredApps, LauncherModel.APP_INSTALL_TIME_COMPARATOR);
	}
	return filteredApps;
	}

	@Override
	public void setApps(ArrayList<ApplicationInfo> list) {
	mApps = list;
	Collections.sort(mApps, LauncherModel.APP_NAME_COMPARATOR);
	mFilteredApps = rebuildFilteredApps(mApps);
	mPageViewIconCache.retainAllApps(list);
	invalidatePageData();
	}

	private void addAppsWithoutInvalidate(ArrayList<ApplicationInfo> list) {
	// we add it in place, in alphabetical order
	final int count = list.size();
	for (int i = 0; i < count; ++i) {
	final ApplicationInfo info = list.get(i);
	final int index = Collections.binarySearch(mApps, info, LauncherModel.APP_NAME_COMPARATOR);
	if (index < 0) {
	mApps.add(-(index + 1), info);
	} else {
	mApps.add(index, info);
	}
	}
	mFilteredApps = rebuildFilteredApps(mApps);
	}
	@Override
	public void addApps(ArrayList<ApplicationInfo> list) {
	addAppsWithoutInvalidate(list);
	invalidatePageData();
	}

	private void removeAppsWithoutInvalidate(ArrayList<ApplicationInfo> list) {
	// End the choice mode if any of the items in the list that are being removed are
	// currently selected
	ArrayList<Checkable> checkedList = getCheckedGrandchildren();
	HashSet<ApplicationInfo> checkedAppInfos = new HashSet<ApplicationInfo>();
	for (Checkable checked : checkedList) {
	PagedViewIcon icon = (PagedViewIcon) checked;
	checkedAppInfos.add((ApplicationInfo) icon.getTag());
	}
	for (ApplicationInfo info : list) {
	if (checkedAppInfos.contains(info)) {
	endChoiceMode();
	break;
	}
	}

	// Loop through all the apps and remove apps that have the same component
	final int length = list.size();
	for (int i = 0; i < length; ++i) {
	final ApplicationInfo info = list.get(i);
	int removeIndex = findAppByComponent(mApps, info);
	if (removeIndex > -1) {
	mApps.remove(removeIndex);
	mPageViewIconCache.removeOutline(new PagedViewIconCache.Key(info));
	}
	}
	mFilteredApps = rebuildFilteredApps(mApps);
	}
	@Override
	public void removeApps(ArrayList<ApplicationInfo> list) {
	removeAppsWithoutInvalidate(list);
	invalidatePageData();
	}

	@Override
	public void updateApps(ArrayList<ApplicationInfo> list) {
	removeAppsWithoutInvalidate(list);
	addAppsWithoutInvalidate(list);
	invalidatePageData();
	}

	private int findAppByComponent(ArrayList<ApplicationInfo> list, ApplicationInfo item) {
	ComponentName removeComponent = item.intent.getComponent();
	final int length = list.size();
	for (int i = 0; i < length; ++i) {
	ApplicationInfo info = list.get(i);
	if (info.intent.getComponent().equals(removeComponent)) {
	return i;
	}
	}
	return -1;
	}

	@Override
	public void dumpState() {
	ApplicationInfo.dumpApplicationInfoList(TAG, "mApps", mApps);
	}

	@Override
	public void surrender() {
	// do nothing?
	}

	@Override
	public void syncPages() {
	// ensure that we have the right number of pages (min of 1, since we have placeholders)
	int numPages = Math.max(1,
	(int) Math.ceil((float) mFilteredApps.size() / (mCellCountX * mCellCountY)));
	int curNumPages = getChildCount();
	// remove any extra pages after the "last" page
	int extraPageDiff = curNumPages - numPages;
	for (int i = 0; i < extraPageDiff; ++i) {
	removeViewAt(numPages);
	}
	// add any necessary pages
	for (int i = curNumPages; i < numPages; ++i) {
	PagedViewCellLayout layout = new PagedViewCellLayout(getContext());
	layout.setCellCount(mCellCountX, mCellCountY);
	layout.setPadding(mPageLayoutPaddingLeft, mPageLayoutPaddingTop,
	mPageLayoutPaddingRight, mPageLayoutPaddingBottom);
	layout.setGap(mPageLayoutWidthGap, mPageLayoutHeightGap);
	addView(layout);
	}

	// bound the current page
	setCurrentPage(Math.max(0, Math.min(numPages - 1, getCurrentPage())));
	}

	@Override
	public void syncPageItems(int page) {
	// Ensure that we have the right number of items on the pages
	final int cellsPerPage = mCellCountX * mCellCountY;
	final int startIndex = page * cellsPerPage;
	final int endIndex = Math.min(startIndex + cellsPerPage, mFilteredApps.size());
	PagedViewCellLayout layout = (PagedViewCellLayout) getChildAt(page);

	if (!mFilteredApps.isEmpty()) {
	int curNumPageItems = layout.getChildCount();
	int numPageItems = endIndex - startIndex;

	// If we were previously an empty page, then restart anew
	boolean wasEmptyPage = false;
	if (curNumPageItems == 1) {
	View icon = layout.getChildAt(0);
	if (icon.getTag() == null) {
	wasEmptyPage = true;
	}
	}

	if (wasEmptyPage) {
	// Remove all the previous items
	curNumPageItems = 0;
	layout.removeAllViews();
	} else {
	// Remove any extra items
	int extraPageItemsDiff = curNumPageItems - numPageItems;
	for (int i = 0; i < extraPageItemsDiff; ++i) {
	layout.removeViewAt(numPageItems);
	}
	}

	// Add any necessary items
	for (int i = curNumPageItems; i < numPageItems; ++i) {
	TextView text = (TextView) mInflater.inflate(
	R.layout.all_apps_paged_view_application, layout, false);
	text.setOnClickListener(this);
	text.setOnLongClickListener(this);
	text.setOnTouchListener(this);

	layout.addViewToCellLayout(text, -1, i,
	new PagedViewCellLayout.LayoutParams(0, 0, 1, 1));
	}

	// Actually reapply to the existing text views
	final int numPages = getPageCount();
	for (int i = startIndex; i < endIndex; ++i) {
	final int index = i - startIndex;
	final ApplicationInfo info = mFilteredApps.get(i);
	PagedViewIcon icon = (PagedViewIcon) layout.getChildAt(index);
	icon.applyFromApplicationInfo(info, mPageViewIconCache, true, (numPages > 1));

	PagedViewCellLayout.LayoutParams params =
	(PagedViewCellLayout.LayoutParams) icon.getLayoutParams();
	params.cellX = index % mCellCountX;
	params.cellY = index / mCellCountX;
	}

	// Default to left-aligned icons
	layout.enableCenteredContent(false);
	} else {
	// There are no items, so show the user a small message
	TextView icon = (TextView) mInflater.inflate(
	R.layout.all_apps_no_items_placeholder, layout, false);
	switch (mAppFilter) {
	case ApplicationInfo.DOWNLOADED_FLAG:
	icon.setText(mContext.getString(R.string.all_apps_no_downloads));
	break;
	default: break;
	}

	// Center-align the message
	layout.enableCenteredContent(true);
	layout.removeAllViews();
	layout.addViewToCellLayout(icon, -1, 0,
	new PagedViewCellLayout.LayoutParams(0, 0, 4, 1));
	}
	}

	/*
	* We don't actually use AllAppsPagedView as a drop target... it's only used to intercept a drop
	* to the workspace.
	*/
	@Override
	public boolean acceptDrop(DragSource source, int x, int y, int xOffset, int yOffset,
	DragView dragView, Object dragInfo) {
	return false;
	}
	@Override
	public DropTarget getDropTargetDelegate(DragSource source, int x, int y, int xOffset,
	int yOffset, DragView dragView, Object dragInfo) {
	return null;
	}
	@Override
	public void onDragEnter(DragSource source, int x, int y, int xOffset, int yOffset,
	DragView dragView, Object dragInfo) {}
	@Override
	public void onDragExit(DragSource source, int x, int y, int xOffset, int yOffset,
	DragView dragView, Object dragInfo) {}
	@Override
	public void onDragOver(DragSource source, int x, int y, int xOffset, int yOffset,
	DragView dragView, Object dragInfo) {}
	@Override
	public void onDrop(DragSource source, int x, int y, int xOffset, int yOffset,
	DragView dragView, Object dragInfo) {}

	public boolean isDropEnabled() {
	return true;
	}
	}