diff --git a/AndroidManifest.xml b/AndroidManifest.xml
index fce4691..f9f5fc2 100644
--- a/AndroidManifest.xml
+++ b/AndroidManifest.xml
@@ -45,6 +45,10 @@
         android:protectionLevel="signature"
         />
     <permission
+        android:name="com.android.launcher3.permission.RECEIVE_UPDATE_ORIENTATION_BROADCASTS"
+        android:protectionLevel="signature"
+        />
+    <permission
         android:name="com.android.launcher3.permission.RECEIVE_FIRST_LOAD_BROADCAST"
         android:protectionLevel="signatureOrSystem" />
 
@@ -62,6 +66,7 @@
     <uses-permission android:name="com.android.launcher3.permission.READ_SETTINGS" />
     <uses-permission android:name="com.android.launcher3.permission.WRITE_SETTINGS" />
     <uses-permission android:name="com.android.launcher3.permission.RECEIVE_LAUNCH_BROADCASTS" />
+    <uses-permission android:name="com.android.launcher3.permission.RECEIVE_UPDATE_ORIENTATION_BROADCASTS" />
     <uses-permission android:name="com.android.launcher3.permission.RECEIVE_FIRST_LOAD_BROADCAST" />
 
     <application
@@ -152,7 +157,8 @@
         <activity
             android:name="com.android.launcher3.SettingsActivity"
             android:label="@string/settings_button_text"
-            android:autoRemoveFromRecents="true">
+            android:autoRemoveFromRecents="true"
+            android:process=":settings_process">
         </activity>
 
         <!-- Debugging tools -->
diff --git a/WallpaperPicker/src/com/android/launcher3/WallpaperPickerActivity.java b/WallpaperPicker/src/com/android/launcher3/WallpaperPickerActivity.java
index 659c306..9415941 100644
--- a/WallpaperPicker/src/com/android/launcher3/WallpaperPickerActivity.java
+++ b/WallpaperPicker/src/com/android/launcher3/WallpaperPickerActivity.java
@@ -49,6 +49,7 @@
 import android.view.Menu;
 import android.view.MenuInflater;
 import android.view.MenuItem;
+import android.view.MotionEvent;
 import android.view.View;
 import android.view.View.OnClickListener;
 import android.view.View.OnLayoutChangeListener;
@@ -891,6 +892,15 @@
 
     private void addLongPressHandler(View v) {
         v.setOnLongClickListener(mLongClickListener);
+
+        // Enable stylus button to also trigger long click.
+        final StylusEventHelper stylusEventHelper = new StylusEventHelper(v);
+        v.setOnTouchListener(new View.OnTouchListener() {
+            @Override
+            public boolean onTouch(View view, MotionEvent event) {
+                return stylusEventHelper.checkAndPerformStylusEvent(event);
+            }
+        });
     }
 
     private ArrayList<WallpaperTileInfo> findBundledWallpapers() {
diff --git a/res/layout-land/launcher.xml b/res/layout-land/launcher.xml
index bf9296f..1c917bf 100644
--- a/res/layout-land/launcher.xml
+++ b/res/layout-land/launcher.xml
@@ -45,7 +45,7 @@
             android:id="@+id/hotseat"
             android:layout_width="match_parent"
             android:layout_height="match_parent"
-            android:layout_gravity="end" />
+            android:layout_gravity="right" />
 
         <include
             android:id="@+id/search_drop_target_bar"
diff --git a/res/layout/widgets_view.xml b/res/layout/widgets_view.xml
index af2c970..a1a62b3 100644
--- a/res/layout/widgets_view.xml
+++ b/res/layout/widgets_view.xml
@@ -39,7 +39,6 @@
             android:layout_width="match_parent"
             android:layout_height="match_parent"
             android:background="@drawable/quantum_panel_dark"
-            android:scrollbars="vertical"
             android:elevation="15dp"
             android:visibility="gone" />
 
diff --git a/res/values-sw600dp/dimens.xml b/res/values-sw600dp/dimens.xml
index 994c192..daa98ef 100644
--- a/res/values-sw600dp/dimens.xml
+++ b/res/values-sw600dp/dimens.xml
@@ -15,8 +15,6 @@
 -->
 
 <resources>
-    <dimen name="app_icon_size">64dp</dimen>
-
 <!-- All Apps -->
     <dimen name="all_apps_container_inset">18dp</dimen>
     <dimen name="all_apps_grid_view_start_margin">0dp</dimen>
diff --git a/res/values-sw720dp/dimens.xml b/res/values-sw720dp/dimens.xml
index 89942f7..9d1e352 100644
--- a/res/values-sw720dp/dimens.xml
+++ b/res/values-sw720dp/dimens.xml
@@ -15,8 +15,6 @@
 -->
 
 <resources>
-    <dimen name="app_icon_size">72dp</dimen>
-
 <!-- All Apps -->
     <dimen name="all_apps_search_bar_height">54dp</dimen>
     <dimen name="all_apps_icon_top_bottom_padding">16dp</dimen>
diff --git a/res/values/dimens.xml b/res/values/dimens.xml
index 7950862..63edd88 100644
--- a/res/values/dimens.xml
+++ b/res/values/dimens.xml
@@ -15,7 +15,7 @@
 -->
 
 <resources>
-    <dimen name="app_icon_size">48dp</dimen>
+    <dimen name="app_icon_size">64dp</dimen>
 
 <!-- Dynamic Grid -->
     <dimen name="dynamic_grid_edge_margin">6dp</dimen>
@@ -63,7 +63,6 @@
     <dimen name="all_apps_prediction_icon_top_bottom_padding">12dp</dimen>
 
     <dimen name="all_apps_fast_scroll_bar_width">4dp</dimen>
-    <dimen name="all_apps_fast_scroll_bar_min_height">64dp</dimen>
     <dimen name="all_apps_fast_scroll_scrubber_touch_inset">-16dp</dimen>
     <dimen name="all_apps_fast_scroll_popup_size">72dp</dimen>
     <dimen name="all_apps_fast_scroll_text_size">48dp</dimen>
diff --git a/res/values/strings.xml b/res/values/strings.xml
index 440a537..305c310 100644
--- a/res/values/strings.xml
+++ b/res/values/strings.xml
@@ -27,6 +27,9 @@
     <!-- Permission to receive the com.android.launcher3.action.LAUNCH intent -->
     <string name="receive_launch_broadcasts_permission" translatable="false">com.android.launcher3.permission.RECEIVE_LAUNCH_BROADCASTS</string>
 
+    <!-- Permission to receive the com.android.launcher3.SCREEN_ORIENTATION_PREF_CHANGED intent -->
+    <string name="receive_update_orientation_broadcasts_permission" translatable="false">com.android.launcher3.permission.RECEIVE_UPDATE_ORIENTATION_BROADCASTS</string>
+
     <!-- Permission to receive the com.android.launcher3.action.FIRST_LOAD_COMPLETE intent -->
     <string name="receive_first_load_broadcast_permission" translatable="false">com.android.launcher3.permission.RECEIVE_FIRST_LOAD_BROADCAST</string>
 
diff --git a/src/com/android/launcher3/BaseRecyclerView.java b/src/com/android/launcher3/BaseRecyclerView.java
index 8d418f9..a207d9a 100644
--- a/src/com/android/launcher3/BaseRecyclerView.java
+++ b/src/com/android/launcher3/BaseRecyclerView.java
@@ -86,10 +86,8 @@
 
     private int mDownX;
     private int mDownY;
-    private int mLastX;
     private int mLastY;
     private int mScrollbarWidth;
-    private int mScrollbarMinHeight;
     private int mScrollbarInset;
     private Rect mBackgroundPadding = new Rect();
 
@@ -121,8 +119,6 @@
         mFastScrollTextPaint.setTextSize(res.getDimensionPixelSize(
                 R.dimen.all_apps_fast_scroll_text_size));
         mScrollbarWidth = res.getDimensionPixelSize(R.dimen.all_apps_fast_scroll_bar_width);
-        mScrollbarMinHeight =
-                res.getDimensionPixelSize(R.dimen.all_apps_fast_scroll_bar_min_height);
         mScrollbarInset =
                 res.getDimensionPixelSize(R.dimen.all_apps_fast_scroll_scrubber_touch_inset);
         setFastScrollerAlpha(mFastScrollAlpha);
@@ -173,7 +169,7 @@
         switch (action) {
             case MotionEvent.ACTION_DOWN:
                 // Keep track of the down positions
-                mDownX = mLastX = x;
+                mDownX = x;
                 mDownY = mLastY = y;
                 if (shouldStopScroll(ev)) {
                     stopScroll();
@@ -188,7 +184,6 @@
                     animateFastScrollerVisibility(true);
                 }
                 if (mDraggingFastScroller) {
-                    mLastX = x;
                     mLastY = y;
 
                     // Scroll to the right position, and update the section name
diff --git a/src/com/android/launcher3/BubbleTextView.java b/src/com/android/launcher3/BubbleTextView.java
index edf5021..f4e306a 100644
--- a/src/com/android/launcher3/BubbleTextView.java
+++ b/src/com/android/launcher3/BubbleTextView.java
@@ -28,7 +28,6 @@
 import android.graphics.drawable.Drawable;
 import android.os.Build;
 import android.util.AttributeSet;
-import android.util.Log;
 import android.util.SparseArray;
 import android.util.TypedValue;
 import android.view.KeyEvent;
@@ -36,7 +35,6 @@
 import android.view.ViewConfiguration;
 import android.view.ViewParent;
 import android.widget.TextView;
-
 import com.android.launcher3.IconCache.IconLoadRequest;
 import com.android.launcher3.model.PackageItemInfo;
 
@@ -59,10 +57,12 @@
     private static final int DISPLAY_WORKSPACE = 0;
     private static final int DISPLAY_ALL_APPS = 1;
 
+    private final Launcher mLauncher;
     private Drawable mIcon;
     private final Drawable mBackground;
     private final CheckLongPressHelper mLongPressHelper;
     private final HolographicOutlineHelper mOutlineHelper;
+    private final StylusEventHelper mStylusEventHelper;
 
     private boolean mBackgroundSizeChanged;
 
@@ -92,8 +92,8 @@
 
     public BubbleTextView(Context context, AttributeSet attrs, int defStyle) {
         super(context, attrs, defStyle);
-        LauncherAppState app = LauncherAppState.getInstance();
-        DeviceProfile grid = ((Launcher) context).getDeviceProfile();
+        mLauncher = (Launcher) context;
+        DeviceProfile grid = mLauncher.getDeviceProfile();
 
         TypedArray a = context.obtainStyledAttributes(attrs,
                 R.styleable.BubbleTextView, defStyle, 0);
@@ -125,6 +125,7 @@
         }
 
         mLongPressHelper = new CheckLongPressHelper(this);
+        mStylusEventHelper = new StylusEventHelper(this);
 
         mOutlineHelper = HolographicOutlineHelper.obtain(getContext());
         if (mCustomShadowsEnabled) {
@@ -142,7 +143,7 @@
             boolean promiseStateChanged) {
         Bitmap b = info.getIcon(iconCache);
 
-        FastBitmapDrawable iconDrawable = Utilities.createIconDrawable(b);
+        FastBitmapDrawable iconDrawable = mLauncher.createIconDrawable(b);
         iconDrawable.setGhostModeEnabled(info.isDisabled != 0);
 
         setIcon(iconDrawable, mIconSize);
@@ -158,7 +159,7 @@
     }
 
     public void applyFromApplicationInfo(AppInfo info) {
-        setIcon(Utilities.createIconDrawable(info.iconBitmap), mIconSize);
+        setIcon(mLauncher.createIconDrawable(info.iconBitmap), mIconSize);
         setText(info.title);
         if (info.contentDescription != null) {
             setContentDescription(info.contentDescription);
@@ -171,7 +172,7 @@
     }
 
     public void applyFromPackageItemInfo(PackageItemInfo info) {
-        setIcon(Utilities.createIconDrawable(info.iconBitmap), mIconSize);
+        setIcon(mLauncher.createIconDrawable(info.iconBitmap), mIconSize);
         setText(info.title);
         if (info.contentDescription != null) {
             setContentDescription(info.contentDescription);
@@ -236,6 +237,12 @@
         // isPressed() on an ACTION_UP
         boolean result = super.onTouchEvent(event);
 
+        // Check for a stylus button press, if it occurs cancel any long press checks.
+        if (mStylusEventHelper.checkAndPerformStylusEvent(event)) {
+            mLongPressHelper.cancelLongPress();
+            result = true;
+        }
+
         switch (event.getAction()) {
             case MotionEvent.ACTION_DOWN:
                 // So that the pressed outline is visible immediately on setStayPressed(),
@@ -245,7 +252,10 @@
                     mPressedBackground = mOutlineHelper.createMediumDropShadow(this);
                 }
 
-                mLongPressHelper.postCheckForLongPress();
+                // If we're in a stylus button press, don't check for long press.
+                if (!mStylusEventHelper.inStylusButtonPressed()) {
+                    mLongPressHelper.postCheckForLongPress();
+                }
                 break;
             case MotionEvent.ACTION_CANCEL:
             case MotionEvent.ACTION_UP:
diff --git a/src/com/android/launcher3/ButtonDropTarget.java b/src/com/android/launcher3/ButtonDropTarget.java
index 4cd28c0..09a71b0 100644
--- a/src/com/android/launcher3/ButtonDropTarget.java
+++ b/src/com/android/launcher3/ButtonDropTarget.java
@@ -64,7 +64,7 @@
     protected Drawable mDrawable;
 
     private AnimatorSet mCurrentColorAnim;
-    private ColorMatrix mSrcFilter, mDstFilter, mCurrentFilter;
+    @Thunk ColorMatrix mSrcFilter, mDstFilter, mCurrentFilter;
 
 
     public ButtonDropTarget(Context context, AttributeSet attrs) {
diff --git a/src/com/android/launcher3/CellLayout.java b/src/com/android/launcher3/CellLayout.java
index 61567ac..b5d0dca 100644
--- a/src/com/android/launcher3/CellLayout.java
+++ b/src/com/android/launcher3/CellLayout.java
@@ -95,6 +95,7 @@
     boolean[][] mTmpOccupied;
 
     private OnTouchListener mInterceptTouchListener;
+    private StylusEventHelper mStylusEventHelper;
 
     private ArrayList<FolderRingAnimator> mFolderOuterRings = new ArrayList<FolderRingAnimator>();
     private int[] mFolderLeaveBehindCell = {-1, -1};
@@ -130,10 +131,8 @@
 
     private final ClickShadowView mTouchFeedbackView;
 
-    @Thunk HashMap<CellLayout.LayoutParams, Animator> mReorderAnimators = new
-            HashMap<CellLayout.LayoutParams, Animator>();
-    private HashMap<View, ReorderPreviewAnimation>
-            mShakeAnimators = new HashMap<View, ReorderPreviewAnimation>();
+    @Thunk HashMap<CellLayout.LayoutParams, Animator> mReorderAnimators = new HashMap<>();
+    @Thunk HashMap<View, ReorderPreviewAnimation> mShakeAnimators = new HashMap<>();
 
     private boolean mItemPlacementDirty = false;
 
@@ -286,6 +285,8 @@
         mShortcutsAndWidgets.setCellDimensions(mCellWidth, mCellHeight, mWidthGap, mHeightGap,
                 mCountX, mCountY);
 
+        mStylusEventHelper = new StylusEventHelper(this);
+
         mTouchFeedbackView = new ClickShadowView(context);
         addView(mTouchFeedbackView);
         addView(mShortcutsAndWidgets);
@@ -338,6 +339,20 @@
         return false;
     }
 
+    @Override
+    public boolean onTouchEvent(MotionEvent ev) {
+        boolean handled = super.onTouchEvent(ev);
+        // Stylus button press on a home screen should not switch between overview mode and
+        // the home screen mode, however, once in overview mode stylus button press should be
+        // enabled to allow rearranging the different home screens. So check what mode
+        // the workspace is in, and only perform stylus button presses while in overview mode.
+        if (mLauncher.mWorkspace.isInOverviewMode()
+                && mStylusEventHelper.checkAndPerformStylusEvent(ev)) {
+            return true;
+        }
+        return handled;
+    }
+
     public void enableHardwareLayer(boolean hasLayer) {
         mShortcutsAndWidgets.setLayerType(hasLayer ? LAYER_TYPE_HARDWARE : LAYER_TYPE_NONE, sPaint);
     }
diff --git a/src/com/android/launcher3/CommonAppTypeParser.java b/src/com/android/launcher3/CommonAppTypeParser.java
index 3164179..5314ecf 100644
--- a/src/com/android/launcher3/CommonAppTypeParser.java
+++ b/src/com/android/launcher3/CommonAppTypeParser.java
@@ -26,6 +26,7 @@
 import com.android.launcher3.AutoInstallsLayout.LayoutParserCallback;
 import com.android.launcher3.LauncherSettings.Favorites;
 import com.android.launcher3.backup.BackupProtos.Favorite;
+import com.android.launcher3.util.Thunk;
 
 import org.xmlpull.v1.XmlPullParserException;
 
@@ -44,8 +45,8 @@
 
 
     private final long mItemId;
-    private final int mResId;
-    private final Context mContext;
+    @Thunk final int mResId;
+    @Thunk final Context mContext;
 
     ContentValues parsedValues;
     Intent parsedIntent;
diff --git a/src/com/android/launcher3/DeviceProfile.java b/src/com/android/launcher3/DeviceProfile.java
index bee6cb0..82be409 100644
--- a/src/com/android/launcher3/DeviceProfile.java
+++ b/src/com/android/launcher3/DeviceProfile.java
@@ -405,7 +405,8 @@
         View searchBar = launcher.getSearchBar();
         lp = (FrameLayout.LayoutParams) searchBar.getLayoutParams();
         if (hasVerticalBarLayout) {
-            // Vertical search bar space
+            // Vertical search bar space -- The search bar is fixed in the layout to be on the left
+            //                              of the screen regardless of RTL
             lp.gravity = Gravity.LEFT;
             lp.width = searchBarSpaceHeightPx;
 
@@ -438,8 +439,9 @@
         View hotseat = launcher.findViewById(R.id.hotseat);
         lp = (FrameLayout.LayoutParams) hotseat.getLayoutParams();
         if (hasVerticalBarLayout) {
-            // Vertical hotseat
-            lp.gravity = Gravity.END;
+            // Vertical hotseat -- The hotseat is fixed in the layout to be on the right of the
+            //                     screen regardless of RTL
+            lp.gravity = Gravity.RIGHT;
             lp.width = hotseatBarHeightPx;
             lp.height = LayoutParams.MATCH_PARENT;
             hotseat.findViewById(R.id.layout).setPadding(0, 2 * edgeMarginPx, 0, 2 * edgeMarginPx);
diff --git a/src/com/android/launcher3/DragView.java b/src/com/android/launcher3/DragView.java
index b332338..dfa8202 100644
--- a/src/com/android/launcher3/DragView.java
+++ b/src/com/android/launcher3/DragView.java
@@ -44,7 +44,7 @@
 
     private Bitmap mBitmap;
     private Bitmap mCrossFadeBitmap;
-    private Paint mPaint;
+    @Thunk Paint mPaint;
     private int mRegistrationX;
     private int mRegistrationY;
 
@@ -62,7 +62,7 @@
     // size.  This is ignored for non-icons.
     private float mIntrinsicIconScale = 1f;
 
-    private float[] mCurrentFilter;
+    @Thunk float[] mCurrentFilter;
     private ValueAnimator mFilterAnimator;
 
     /**
diff --git a/src/com/android/launcher3/FocusHelper.java b/src/com/android/launcher3/FocusHelper.java
index 46e4902..70bb01a 100644
--- a/src/com/android/launcher3/FocusHelper.java
+++ b/src/com/android/launcher3/FocusHelper.java
@@ -426,7 +426,7 @@
     /**
      * Private helper method to get the CellLayoutChildren given a CellLayout index.
      */
-    private static ShortcutAndWidgetContainer getCellLayoutChildrenForIndex(
+    @Thunk static ShortcutAndWidgetContainer getCellLayoutChildrenForIndex(
             ViewGroup container, int i) {
         CellLayout parent = (CellLayout) container.getChildAt(i);
         return parent.getShortcutsAndWidgets();
diff --git a/src/com/android/launcher3/Folder.java b/src/com/android/launcher3/Folder.java
index fcfb717..94f8fc8 100644
--- a/src/com/android/launcher3/Folder.java
+++ b/src/com/android/launcher3/Folder.java
@@ -29,6 +29,7 @@
 import android.graphics.PointF;
 import android.graphics.Rect;
 import android.os.Build;
+import android.os.Bundle;
 import android.text.InputType;
 import android.text.Selection;
 import android.text.Spannable;
@@ -66,7 +67,8 @@
  */
 public class Folder extends LinearLayout implements DragSource, View.OnClickListener,
         View.OnLongClickListener, DropTarget, FolderListener, TextView.OnEditorActionListener,
-        View.OnFocusChangeListener, DragListener, UninstallSource, AccessibilityDragSource {
+        View.OnFocusChangeListener, DragListener, UninstallSource, AccessibilityDragSource,
+        Stats.LaunchSourceProvider {
     private static final String TAG = "Launcher.Folder";
 
     /**
@@ -923,7 +925,7 @@
             View v = list.get(i);
             ItemInfo info = (ItemInfo) v.getTag();
             LauncherModel.addItemToDatabase(mLauncher, info, mInfo.id, 0,
-                        info.cellX, info.cellY);
+                    info.cellX, info.cellY);
         }
     }
 
@@ -1338,6 +1340,14 @@
         outRect.right += mScrollAreaOffset;
     }
 
+    @Override
+    public void fillInLaunchSourceData(Bundle sourceData) {
+        // Fill in from the folder icon's launch source provider first
+        Stats.LaunchSourceUtils.populateSourceDataFromAncestorProvider(mFolderIcon, sourceData);
+        sourceData.putString(Stats.SOURCE_EXTRA_SUB_CONTAINER, Stats.SUB_CONTAINER_FOLDER);
+        sourceData.putInt(Stats.SOURCE_EXTRA_SUB_CONTAINER_PAGE, mContent.getCurrentPage());
+    }
+
     private class OnScrollHintListener implements OnAlarmListener {
 
         private final DragObject mDragObject;
diff --git a/src/com/android/launcher3/FolderIcon.java b/src/com/android/launcher3/FolderIcon.java
index 8652eef..f1e9dc8 100644
--- a/src/com/android/launcher3/FolderIcon.java
+++ b/src/com/android/launcher3/FolderIcon.java
@@ -57,6 +57,7 @@
     @Thunk static boolean sStaticValuesDirty = true;
 
     private CheckLongPressHelper mLongPressHelper;
+    private StylusEventHelper mStylusEventHelper;
 
     // The number of icons to display in the
     public static final int NUM_ITEMS_IN_PREVIEW = 3;
@@ -128,6 +129,7 @@
 
     private void init() {
         mLongPressHelper = new CheckLongPressHelper(this);
+        mStylusEventHelper = new StylusEventHelper(this);
         setAccessibilityDelegate(LauncherAppState.getInstance().getAccessibilityDelegate());
     }
 
@@ -643,9 +645,10 @@
             final Runnable onCompleteRunnable) {
         final PreviewItemDrawingParams finalParams = computePreviewItemDrawingParams(0, null);
 
-        final float scale0 = 1.0f;
-        final float transX0 = (mAvailableSpaceInPreview - d.getIntrinsicWidth()) / 2;
-        final float transY0 = (mAvailableSpaceInPreview - d.getIntrinsicHeight()) / 2 + getPaddingTop();
+        float iconSize = mLauncher.getDeviceProfile().iconSizePx;
+        final float scale0 = iconSize / d.getIntrinsicWidth() ;
+        final float transX0 = (mAvailableSpaceInPreview - iconSize) / 2;
+        final float transY0 = (mAvailableSpaceInPreview - iconSize) / 2 + getPaddingTop();
         mAnimParams.drawable = d;
 
         ValueAnimator va = LauncherAnimUtils.ofFloat(this, 0f, 1.0f);
@@ -719,6 +722,12 @@
         // isPressed() on an ACTION_UP
         boolean result = super.onTouchEvent(event);
 
+        // Check for a stylus button press, if it occurs cancel any long press checks.
+        if (mStylusEventHelper.checkAndPerformStylusEvent(event)) {
+            mLongPressHelper.cancelLongPress();
+            return true;
+        }
+
         switch (event.getAction()) {
             case MotionEvent.ACTION_DOWN:
                 mLongPressHelper.postCheckForLongPress();
diff --git a/src/com/android/launcher3/Hotseat.java b/src/com/android/launcher3/Hotseat.java
index ce33164..6e33d10 100644
--- a/src/com/android/launcher3/Hotseat.java
+++ b/src/com/android/launcher3/Hotseat.java
@@ -19,15 +19,16 @@
 import android.content.Context;
 import android.content.res.Configuration;
 import android.content.res.Resources;
-import android.graphics.Rect;
 import android.graphics.drawable.Drawable;
+import android.os.Bundle;
 import android.util.AttributeSet;
 import android.view.LayoutInflater;
 import android.view.MotionEvent;
 import android.widget.FrameLayout;
 import android.widget.TextView;
 
-public class Hotseat extends FrameLayout {
+public class Hotseat extends FrameLayout
+        implements Stats.LaunchSourceProvider{
 
     private CellLayout mContent;
 
@@ -130,7 +131,7 @@
                 inflater.inflate(R.layout.all_apps_button, mContent, false);
         Drawable d = context.getResources().getDrawable(R.drawable.all_apps_button_icon);
 
-        Utilities.resizeIconDrawable(d);
+        mLauncher.resizeIconDrawable(d);
         allAppsButton.setCompoundDrawables(null, d, null, null);
 
         allAppsButton.setContentDescription(context.getString(R.string.all_apps_button_label));
@@ -160,4 +161,9 @@
         }
         return false;
     }
+
+    @Override
+    public void fillInLaunchSourceData(Bundle sourceData) {
+        sourceData.putString(Stats.SOURCE_EXTRA_CONTAINER, Stats.CONTAINER_HOTSEAT);
+    }
 }
diff --git a/src/com/android/launcher3/IconCache.java b/src/com/android/launcher3/IconCache.java
index 6dfca9e..3165337 100644
--- a/src/com/android/launcher3/IconCache.java
+++ b/src/com/android/launcher3/IconCache.java
@@ -16,7 +16,6 @@
 
 package com.android.launcher3;
 
-import android.app.ActivityManager;
 import android.content.ComponentName;
 import android.content.ContentValues;
 import android.content.Context;
@@ -69,7 +68,7 @@
 
     private static final int LOW_RES_SCALE_FACTOR = 8;
 
-    private static final Object ICON_UPDATE_TOKEN = new Object();
+    @Thunk static final Object ICON_UPDATE_TOKEN = new Object();
 
     @Thunk static class CacheEntry {
         public Bitmap icon;
@@ -79,28 +78,25 @@
     }
 
     private final HashMap<UserHandleCompat, Bitmap> mDefaultIcons = new HashMap<>();
-    private final MainThreadExecutor mMainThreadExecutor = new MainThreadExecutor();
+    @Thunk final MainThreadExecutor mMainThreadExecutor = new MainThreadExecutor();
 
     private final Context mContext;
     private final PackageManager mPackageManager;
-    private final UserManagerCompat mUserManager;
+    @Thunk final UserManagerCompat mUserManager;
     private final LauncherAppsCompat mLauncherApps;
     private final HashMap<ComponentKey, CacheEntry> mCache =
             new HashMap<ComponentKey, CacheEntry>(INITIAL_ICON_CACHE_CAPACITY);
     private final int mIconDpi;
-    private final IconDB mIconDb;
+    @Thunk final IconDB mIconDb;
 
-    private final Handler mWorkerHandler;
+    @Thunk final Handler mWorkerHandler;
 
     public IconCache(Context context, InvariantDeviceProfile inv) {
-        ActivityManager activityManager =
-                (ActivityManager) context.getSystemService(Context.ACTIVITY_SERVICE);
-
         mContext = context;
         mPackageManager = context.getPackageManager();
         mUserManager = UserManagerCompat.getInstance(mContext);
         mLauncherApps = LauncherAppsCompat.getInstance(mContext);
-        mIconDpi = activityManager.getLauncherLargeIconDensity();
+        mIconDpi = inv.fillResIconDpi;
         mIconDb = new IconDB(context);
 
         mWorkerHandler = new Handler(LauncherModel.getWorkerLooper());
@@ -136,10 +132,6 @@
         return getFullResDefaultActivityIcon();
     }
 
-    public int getFullResIconDpi() {
-        return mIconDpi;
-    }
-
     public Drawable getFullResIcon(ActivityInfo info) {
         Resources resources;
         try {
@@ -283,6 +275,7 @@
             ComponentName component = ComponentName.unflattenFromString(cn);
             PackageInfo info = pkgInfoMap.get(component.getPackageName());
             if (info == null) {
+                remove(component, user);
                 itemsToRemove.add(c.getInt(rowIndex));
                 continue;
             }
@@ -299,6 +292,7 @@
                 continue;
             }
             if (app == null) {
+                remove(component, user);
                 itemsToRemove.add(c.getInt(rowIndex));
             } else {
                 appsToUpdate.add(app);
@@ -320,7 +314,7 @@
         }
     }
 
-    private void addIconToDBAndMemCache(LauncherActivityInfoCompat app, PackageInfo info,
+    @Thunk void addIconToDBAndMemCache(LauncherActivityInfoCompat app, PackageInfo info,
             long userSerial) {
         // Reuse the existing entry if it already exists in the DB. This ensures that we do not
         // create bitmap if it was already created during loader.
@@ -342,7 +336,7 @@
                 SQLiteDatabase.CONFLICT_REPLACE);
     }
 
-    private ContentValues updateCacheAndGetContentValues(LauncherActivityInfoCompat app,
+    @Thunk ContentValues updateCacheAndGetContentValues(LauncherActivityInfoCompat app,
             boolean replaceExisting) {
         final ComponentKey key = new ComponentKey(app.getComponentName(), app.getUser());
         CacheEntry entry = null;
@@ -570,9 +564,10 @@
      */
     private CacheEntry getEntryForPackageLocked(String packageName, UserHandleCompat user,
             boolean useLowResIcon) {
-        ComponentName cn = new ComponentName(packageName, EMPTY_CLASS_NAME);
+        ComponentName cn = new ComponentName(packageName, packageName + EMPTY_CLASS_NAME);
         ComponentKey cacheKey = new ComponentKey(cn, user);
         CacheEntry entry = mCache.get(cacheKey);
+
         if (entry == null || (entry.isLowResIcon && !useLowResIcon)) {
             entry = new CacheEntry();
             boolean entryUpdated = true;
@@ -688,14 +683,14 @@
      * LauncherActivityInfoCompat list. Items are updated/added one at a time, so that the
      * worker thread doesn't get blocked.
      */
-    private class SerializedIconUpdateTask implements Runnable {
+    @Thunk class SerializedIconUpdateTask implements Runnable {
         private final long mUserSerial;
         private final HashMap<String, PackageInfo> mPkgInfoMap;
         private final Stack<LauncherActivityInfoCompat> mAppsToAdd;
         private final Stack<LauncherActivityInfoCompat> mAppsToUpdate;
         private final HashSet<String> mUpdatedPackages = new HashSet<String>();
 
-        private SerializedIconUpdateTask(long userSerial, HashMap<String, PackageInfo> pkgInfoMap,
+        @Thunk SerializedIconUpdateTask(long userSerial, HashMap<String, PackageInfo> pkgInfoMap,
                 Stack<LauncherActivityInfoCompat> appsToAdd,
                 Stack<LauncherActivityInfoCompat> appsToUpdate) {
             mUserSerial = userSerial;
@@ -744,7 +739,7 @@
     }
 
     private static final class IconDB extends SQLiteOpenHelper {
-        private final static int DB_VERSION = 4;
+        private final static int DB_VERSION = 5;
 
         private final static String TABLE_NAME = "icons";
         private final static String COLUMN_ROWID = "rowid";
diff --git a/src/com/android/launcher3/InvariantDeviceProfile.java b/src/com/android/launcher3/InvariantDeviceProfile.java
index 7f34593..fcaf834 100644
--- a/src/com/android/launcher3/InvariantDeviceProfile.java
+++ b/src/com/android/launcher3/InvariantDeviceProfile.java
@@ -35,6 +35,8 @@
     // This is a static that we use for the default icon size on a 4/5-inch phone
     private static float DEFAULT_ICON_SIZE_DP = 60;
 
+    private static final float ICON_SIZE_DEFINED_IN_APP_DP = 48;
+
     // Constants that affects the interpolation curve between statically defined device profile
     // buckets.
     private static float KNEARESTNEIGHBOR = 3;
@@ -60,6 +62,8 @@
     public int numFolderRows;
     public int numFolderColumns;
     float iconSize;
+    int iconBitmapSize;
+    int fillResIconDpi;
     float iconTextSize;
 
     /**
@@ -135,8 +139,10 @@
         numFolderColumns = closestProfile.numFolderColumns;
 
         iconSize = interpolatedDeviceProfileOut.iconSize;
+        iconBitmapSize = Utilities.pxFromDp(iconSize, dm);
         iconTextSize = interpolatedDeviceProfileOut.iconTextSize;
         hotseatIconSize = interpolatedDeviceProfileOut.hotseatIconSize;
+        fillResIconDpi = getLauncherIconDensity(iconBitmapSize);
 
         // If the partner customization apk contains any grid overrides, apply them
         // Supported overrides: numRows, numColumns, iconSize
@@ -187,6 +193,29 @@
         return predefinedDeviceProfiles;
     }
 
+    private int getLauncherIconDensity(int requiredSize) {
+        // Densities typically defined by an app.
+        int[] densityBuckets = new int[] {
+                DisplayMetrics.DENSITY_LOW,
+                DisplayMetrics.DENSITY_MEDIUM,
+                DisplayMetrics.DENSITY_TV,
+                DisplayMetrics.DENSITY_HIGH,
+                DisplayMetrics.DENSITY_XHIGH,
+                DisplayMetrics.DENSITY_XXHIGH,
+                DisplayMetrics.DENSITY_XXXHIGH
+        };
+
+        int density = DisplayMetrics.DENSITY_XXXHIGH;
+        for (int i = densityBuckets.length - 1; i >= 0; i--) {
+            float expectedSize = ICON_SIZE_DEFINED_IN_APP_DP * densityBuckets[i]
+                    / DisplayMetrics.DENSITY_DEFAULT;
+            if (expectedSize >= requiredSize) {
+                density = densityBuckets[i];
+            }
+        }
+
+        return density;
+    }
 
     /**
      * Apply any Partner customization grid overrides.
diff --git a/src/com/android/launcher3/Launcher.java b/src/com/android/launcher3/Launcher.java
index ef34660..6dfe0eb 100644
--- a/src/com/android/launcher3/Launcher.java
+++ b/src/com/android/launcher3/Launcher.java
@@ -265,7 +265,7 @@
 
     private int[] mTmpAddItemCellCoordinates = new int[2];
 
-    private Hotseat mHotseat;
+    @Thunk Hotseat mHotseat;
     private ViewGroup mOverviewPanel;
 
     private View mAllAppsButton;
@@ -402,23 +402,35 @@
 
     FocusIndicatorView mFocusHandler;
 
-    private boolean mRotationEnabled = false;
-    private boolean mPreferenceObserverRegistered = false;
+    @Thunk boolean mRotationEnabled = false;
+    private boolean mScreenOrientationSettingReceiverRegistered = false;
 
-    final private SharedPreferences.OnSharedPreferenceChangeListener mSettingsObserver =
-            new SharedPreferences.OnSharedPreferenceChangeListener() {
-        @Override
-        public void onSharedPreferenceChanged(SharedPreferences sharedPreferences, String key) {
-            if (Utilities.ALLOW_ROTATION_PREFERENCE_KEY.equals(key)) {
-                if (mRotationEnabled = sharedPreferences.getBoolean(
-                        Utilities.ALLOW_ROTATION_PREFERENCE_KEY, false)) {
-                    unlockScreenOrientation(true);
-                } else {
-                    setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_NOSENSOR);
+    final private BroadcastReceiver mScreenOrientationSettingReceiver =
+            new BroadcastReceiver() {
+                @Thunk Runnable mUpdateOrientationRunnable = new Runnable() {
+                    public void run() {
+                        setOrientation();
+                    }
+                };
+
+                @Override
+                public void onReceive(Context context, Intent intent) {
+                    mRotationEnabled = intent.getBooleanExtra(
+                            Utilities.SCREEN_ROTATION_SETTING_EXTRA, false);
+                    if (!waitUntilResume(mUpdateOrientationRunnable, true)) {
+                        setOrientation();
+                    }
                 }
-            }
+            };
+
+    @Thunk void setOrientation() {
+        if (mRotationEnabled) {
+            unlockScreenOrientation(true);
+        } else {
+            setRequestedOrientation(
+                    ActivityInfo.SCREEN_ORIENTATION_NOSENSOR);
         }
-    };
+    }
 
     @Override
     protected void onCreate(Bundle savedInstanceState) {
@@ -453,9 +465,6 @@
                         app.getInvariantDeviceProfile().landscapeProfile
                             : app.getInvariantDeviceProfile().portraitProfile;
 
-        // TODO: Move this to icon cache.
-        Utilities.setIconSize(mDeviceProfile.iconSizePx);
-
         // the LauncherApplication should call this, but in case of Instrumentation it might not be present yet
         mSharedPrefs = getSharedPreferences(LauncherAppState.getSharedPreferencesKey(),
                 Context.MODE_PRIVATE);
@@ -523,16 +532,18 @@
         // In case we are on a device with locked rotation, we should look at preferences to check
         // if the user has specifically allowed rotation.
         if (!mRotationEnabled) {
-            getSharedPreferences(LauncherFiles.ROTATION_PREF_FILE,
-                    Context.MODE_MULTI_PROCESS).registerOnSharedPreferenceChangeListener(
-                    mSettingsObserver);
-            mPreferenceObserverRegistered = true;
+            String updateOrientationBroadcastPermission = getResources().getString(
+                    R.string.receive_update_orientation_broadcasts_permission);
+            registerReceiver(mScreenOrientationSettingReceiver,
+                    new IntentFilter(Utilities.SCREEN_ROTATION_SETTING_INTENT),
+                    updateOrientationBroadcastPermission, null);
+            mScreenOrientationSettingReceiverRegistered = true;
             mRotationEnabled = Utilities.isAllowRotationPrefEnabled(getApplicationContext());
         }
 
         // On large interfaces, or on devices that a user has specifically enabled screen rotation,
         // we want the screen to auto-rotate based on the current orientation
-        unlockScreenOrientation(true);
+        setOrientation();
 
         if (mLauncherCallbacks != null) {
             mLauncherCallbacks.onCreate(savedInstanceState);
@@ -1531,7 +1542,6 @@
      * Add a shortcut to the workspace.
      *
      * @param data The intent describing the shortcut.
-     * @param cellInfo The position on screen where to create the shortcut.
      */
     private void completeAddShortcut(Intent data, long container, long screenId, int cellX,
             int cellY) {
@@ -2020,11 +2030,9 @@
     public void onDestroy() {
         super.onDestroy();
 
-        if (mPreferenceObserverRegistered) {
-            getSharedPreferences(LauncherFiles.ROTATION_PREF_FILE,
-                    Context.MODE_MULTI_PROCESS).unregisterOnSharedPreferenceChangeListener(
-                    mSettingsObserver);
-            mPreferenceObserverRegistered = false;
+        if (mScreenOrientationSettingReceiverRegistered) {
+            unregisterReceiver(mScreenOrientationSettingReceiver);
+            mScreenOrientationSettingReceiverRegistered = false;
         }
 
         // Remove all pending runnables
@@ -2549,13 +2557,6 @@
         }
     }
 
-    public void onClickPagedViewIcon(View v) {
-        startAppShortcutOrInfoActivity(v);
-        if (mLauncherCallbacks != null) {
-            mLauncherCallbacks.onClickPagedViewIcon(v);
-        }
-    }
-
     @SuppressLint("ClickableViewAccessibility")
     public boolean onTouch(View v, MotionEvent event) {
         return false;
@@ -2714,7 +2715,7 @@
         }
 
         boolean success = startActivitySafely(v, intent, tag);
-        mStats.recordLaunch(intent, shortcut);
+        mStats.recordLaunch(v, intent, shortcut);
 
         if (success && v instanceof BubbleTextView) {
             mWaitingForResume = (BubbleTextView) v;
@@ -2936,7 +2937,7 @@
         }
     }
 
-    boolean startActivity(View v, Intent intent, Object tag) {
+    private boolean startActivity(View v, Intent intent, Object tag) {
         intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
         try {
             // Only launch using the new animation if the shortcut has not opted out (this is a
@@ -3007,7 +3008,7 @@
         return false;
     }
 
-    boolean startActivitySafely(View v, Intent intent, Object tag) {
+    private boolean startActivitySafely(View v, Intent intent, Object tag) {
         boolean success = false;
         if (mIsSafeModeEnabled && !Utilities.isSystemApp(this, intent)) {
             Toast.makeText(this, R.string.safemode_shortcut_error, Toast.LENGTH_SHORT).show();
@@ -3674,7 +3675,7 @@
      *
      * @return {@code true} if we are currently paused. The caller might be able to skip some work
      */
-    private boolean waitUntilResume(Runnable run, boolean deletePreviousRunnables) {
+    @Thunk boolean waitUntilResume(Runnable run, boolean deletePreviousRunnables) {
         if (mPaused) {
             if (LOGD) Log.d(TAG, "Deferring update until onResume");
             if (deletePreviousRunnables) {
@@ -4682,6 +4683,23 @@
     }
 
     /**
+     * Returns a FastBitmapDrawable with the icon, accurately sized.
+     */
+    public FastBitmapDrawable createIconDrawable(Bitmap icon) {
+        FastBitmapDrawable d = new FastBitmapDrawable(icon);
+        d.setFilterBitmap(true);
+        resizeIconDrawable(d);
+        return d;
+    }
+
+    /**
+     * Resizes an icon drawable to the correct icon size.
+     */
+    public void resizeIconDrawable(Drawable icon) {
+        icon.setBounds(0, 0, mDeviceProfile.iconSizePx, mDeviceProfile.iconSizePx);
+    }
+
+    /**
      * Prints out out state for debugging.
      */
     public void dumpState() {
diff --git a/src/com/android/launcher3/LauncherAppWidgetHostView.java b/src/com/android/launcher3/LauncherAppWidgetHostView.java
index 71fb2d2..cf461a5 100644
--- a/src/com/android/launcher3/LauncherAppWidgetHostView.java
+++ b/src/com/android/launcher3/LauncherAppWidgetHostView.java
@@ -36,6 +36,7 @@
     LayoutInflater mInflater;
 
     private CheckLongPressHelper mLongPressHelper;
+    private StylusEventHelper mStylusEventHelper;
     private Context mContext;
     private int mPreviousOrientation;
     private DragLayer mDragLayer;
@@ -46,6 +47,7 @@
         super(context);
         mContext = context;
         mLongPressHelper = new CheckLongPressHelper(this);
+        mStylusEventHelper = new StylusEventHelper(this);
         mInflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
         mDragLayer = ((Launcher) context).getDragLayer();
         setAccessibilityDelegate(LauncherAppState.getInstance().getAccessibilityDelegate());
@@ -89,11 +91,17 @@
             return true;
         }
 
-        // Watch for longpress events at this level to make sure
-        // users can always pick up this widget
+        // Watch for longpress or stylus button press events at this level to
+        // make sure users can always pick up this widget
+        if (mStylusEventHelper.checkAndPerformStylusEvent(ev)) {
+            mLongPressHelper.cancelLongPress();
+            return true;
+        }
         switch (ev.getAction()) {
             case MotionEvent.ACTION_DOWN: {
-                mLongPressHelper.postCheckForLongPress();
+                if (!mStylusEventHelper.inStylusButtonPressed()) {
+                    mLongPressHelper.postCheckForLongPress();
+                }
                 mDragLayer.setTouchCompleteListener(this);
                 break;
             }
diff --git a/src/com/android/launcher3/LauncherAppWidgetProviderInfo.java b/src/com/android/launcher3/LauncherAppWidgetProviderInfo.java
index 7ca4fe3..85af92f 100644
--- a/src/com/android/launcher3/LauncherAppWidgetProviderInfo.java
+++ b/src/com/android/launcher3/LauncherAppWidgetProviderInfo.java
@@ -67,7 +67,8 @@
         if (isCustomWidget) {
             return cache.getFullResIcon(provider.getPackageName(), icon);
         }
-        return super.loadIcon(context, cache.getFullResIconDpi());
+        return super.loadIcon(context,
+                LauncherAppState.getInstance().getInvariantDeviceProfile().fillResIconDpi);
     }
 
     public String toString(PackageManager pm) {
diff --git a/src/com/android/launcher3/LauncherBackupHelper.java b/src/com/android/launcher3/LauncherBackupHelper.java
index af41012..b40ace3 100644
--- a/src/com/android/launcher3/LauncherBackupHelper.java
+++ b/src/com/android/launcher3/LauncherBackupHelper.java
@@ -51,13 +51,13 @@
 import com.android.launcher3.backup.BackupProtos.Widget;
 import com.android.launcher3.compat.UserHandleCompat;
 import com.android.launcher3.compat.UserManagerCompat;
+import com.android.launcher3.util.Thunk;
 import com.google.protobuf.nano.InvalidProtocolBufferNanoException;
 import com.google.protobuf.nano.MessageNano;
 
 import org.xmlpull.v1.XmlPullParser;
 import org.xmlpull.v1.XmlPullParserException;
 
-import java.io.ByteArrayOutputStream;
 import java.io.FileInputStream;
 import java.io.FileOutputStream;
 import java.io.IOException;
@@ -135,7 +135,7 @@
 
     private static final int SCREEN_RANK_INDEX = 2;
 
-    private final Context mContext;
+    @Thunk final Context mContext;
     private final HashSet<String> mExistingKeys;
     private final ArrayList<Key> mKeys;
     private final ItemTypeMatcher[] mItemTypeMatchers;
@@ -1157,15 +1157,15 @@
                 .getSerialNumberForUser(UserHandleCompat.myUserHandle());
     }
 
-    private class InvalidBackupException extends IOException {
+    @Thunk class InvalidBackupException extends IOException {
 
         private static final long serialVersionUID = 8931456637211665082L;
 
-        private InvalidBackupException(Throwable cause) {
+        @Thunk InvalidBackupException(Throwable cause) {
             super(cause);
         }
 
-        public InvalidBackupException(String reason) {
+        @Thunk InvalidBackupException(String reason) {
             super(reason);
         }
     }
diff --git a/src/com/android/launcher3/LauncherCallbacks.java b/src/com/android/launcher3/LauncherCallbacks.java
index a5f36ba..70e400b 100644
--- a/src/com/android/launcher3/LauncherCallbacks.java
+++ b/src/com/android/launcher3/LauncherCallbacks.java
@@ -56,6 +56,8 @@
     public void bindAllApplications(ArrayList<AppInfo> apps);
     public void onClickFolderIcon(View v);
     public void onClickAppShortcut(View v);
+
+    @Deprecated
     public void onClickPagedViewIcon(View v);
     public void onClickWallpaperPicker(View v);
     public void onClickSettingsButton(View v);
diff --git a/src/com/android/launcher3/LauncherModel.java b/src/com/android/launcher3/LauncherModel.java
index 224ebbf..53966a5 100644
--- a/src/com/android/launcher3/LauncherModel.java
+++ b/src/com/android/launcher3/LauncherModel.java
@@ -275,7 +275,7 @@
     /**
      * Runs the specified runnable after the loader is complete
      */
-    private void runAfterBindCompletes(Runnable r) {
+    @Thunk void runAfterBindCompletes(Runnable r) {
         if (isLoadingWorkspace() || !mHasLoaderCompletedOnce) {
             synchronized (mBindCompleteRunnables) {
                 mBindCompleteRunnables.add(r);
@@ -2932,6 +2932,9 @@
                 }
             });
         }
+
+        // Reload widget list. No need to refresh, as we only want to update the icons and labels.
+        loadAndBindWidgetsAndShortcuts(mApp.getContext(), callbacks, false);
     }
 
     void enqueuePackageUpdated(PackageUpdatedTask task) {
@@ -3114,8 +3117,9 @@
                             // Update shortcuts which use iconResource.
                             if ((si.iconResource != null)
                                     && packageSet.contains(si.iconResource.packageName)) {
-                                Bitmap icon = Utilities.createIconBitmap(si.iconResource.packageName,
-                                        si.iconResource.resourceName, mIconCache, context);
+                                Bitmap icon = Utilities.createIconBitmap(
+                                        si.iconResource.packageName,
+                                        si.iconResource.resourceName, context);
                                 if (icon != null) {
                                     si.setIcon(icon);
                                     si.usingFallbackIcon = false;
@@ -3350,7 +3354,7 @@
      *
      * @see #loadAndBindWidgetsAndShortcuts
      */
-    private WidgetsModel createWidgetsModel(Context context, boolean refresh) {
+    @Thunk WidgetsModel createWidgetsModel(Context context, boolean refresh) {
         PackageManager packageManager = context.getPackageManager();
         final ArrayList<Object> widgetsAndShortcuts = new ArrayList<Object>();
         widgetsAndShortcuts.addAll(getWidgetProviders(context, refresh));
@@ -3558,7 +3562,7 @@
             String resourceName = c.getString(iconResourceIndex);
             info.customIcon = false;
             // the resource
-            icon = Utilities.createIconBitmap(packageName, resourceName, mIconCache, context);
+            icon = Utilities.createIconBitmap(packageName, resourceName, context);
             // the db
             if (icon == null) {
                 icon = Utilities.createIconBitmap(c, iconIndex, context);
@@ -3612,7 +3616,7 @@
             if (extra instanceof ShortcutIconResource) {
                 iconResource = (ShortcutIconResource) extra;
                 icon = Utilities.createIconBitmap(iconResource.packageName,
-                        iconResource.resourceName, mIconCache, context);
+                        iconResource.resourceName, context);
             }
         }
 
diff --git a/src/com/android/launcher3/LauncherProvider.java b/src/com/android/launcher3/LauncherProvider.java
index 2751152..45070d1 100644
--- a/src/com/android/launcher3/LauncherProvider.java
+++ b/src/com/android/launcher3/LauncherProvider.java
@@ -88,7 +88,7 @@
     static final Uri CONTENT_APPWIDGET_RESET_URI =
             Uri.parse("content://" + AUTHORITY + "/appWidgetReset");
 
-    private DatabaseHelper mOpenHelper;
+    @Thunk DatabaseHelper mOpenHelper;
 
     @Override
     public boolean onCreate() {
@@ -665,7 +665,7 @@
          * Replaces all shortcuts of type {@link Favorites#ITEM_TYPE_SHORTCUT} which have a valid
          * launcher activity target with {@link Favorites#ITEM_TYPE_APPLICATION}.
          */
-        private void convertShortcutsToLauncherActivities(SQLiteDatabase db) {
+        @Thunk void convertShortcutsToLauncherActivities(SQLiteDatabase db) {
             db.beginTransaction();
             Cursor c = null;
             SQLiteStatement updateStmt = null;
diff --git a/src/com/android/launcher3/PagedView.java b/src/com/android/launcher3/PagedView.java
index 9271e8b..18832c6 100644
--- a/src/com/android/launcher3/PagedView.java
+++ b/src/com/android/launcher3/PagedView.java
@@ -22,11 +22,13 @@
 import android.animation.LayoutTransition;
 import android.animation.ObjectAnimator;
 import android.animation.TimeInterpolator;
+import android.annotation.TargetApi;
 import android.content.Context;
 import android.content.res.TypedArray;
 import android.graphics.Canvas;
 import android.graphics.Matrix;
 import android.graphics.Rect;
+import android.os.Build;
 import android.os.Bundle;
 import android.os.Parcel;
 import android.os.Parcelable;
@@ -45,9 +47,7 @@
 import android.view.accessibility.AccessibilityManager;
 import android.view.accessibility.AccessibilityNodeInfo;
 import android.view.animation.Interpolator;
-
 import com.android.launcher3.util.Thunk;
-
 import java.util.ArrayList;
 
 /**
@@ -186,7 +186,7 @@
     // We use the min scale to determine how much to expand the actually PagedView measured
     // dimensions such that when we are zoomed out, the view is not clipped
     private static int REORDERING_DROP_REPOSITION_DURATION = 200;
-    private static int REORDERING_REORDER_REPOSITION_DURATION = 300;
+    @Thunk static int REORDERING_REORDER_REPOSITION_DURATION = 300;
     private static int REORDERING_SIDE_PAGE_HOVER_TIMEOUT = 80;
 
     private float mMinScale = 1f;
@@ -956,7 +956,7 @@
         return 0;
     }
 
-    private void updateMaxScrollX() {
+    @Thunk void updateMaxScrollX() {
         int childCount = getChildCount();
         if (childCount > 0) {
             final int index = mIsRtl ? 0 : childCount - 1;
@@ -2322,6 +2322,7 @@
     private static final int ANIM_TAG_KEY = 100;
 
     /* Accessibility */
+    @TargetApi(Build.VERSION_CODES.LOLLIPOP)
     @Override
     public void onInitializeAccessibilityNodeInfo(AccessibilityNodeInfo info) {
         super.onInitializeAccessibilityNodeInfo(info);
diff --git a/src/com/android/launcher3/PendingAppWidgetHostView.java b/src/com/android/launcher3/PendingAppWidgetHostView.java
index c8b27ef..08f8e56 100644
--- a/src/com/android/launcher3/PendingAppWidgetHostView.java
+++ b/src/com/android/launcher3/PendingAppWidgetHostView.java
@@ -121,7 +121,7 @@
             //   2) Preload icon in the center
             //   3) Setup icon in the center and app icon in the top right corner.
             if (mDisabledForSafeMode) {
-                FastBitmapDrawable disabledIcon = Utilities.createIconDrawable(mIcon);
+                FastBitmapDrawable disabledIcon = mLauncher.createIconDrawable(mIcon);
                 disabledIcon.setGhostModeEnabled(true);
                 mCenterDrawable = disabledIcon;
                 mTopCornerDrawable = null;
@@ -134,7 +134,7 @@
                     sPreloaderTheme.applyStyle(R.style.PreloadIcon, true);
                 }
 
-                FastBitmapDrawable drawable = Utilities.createIconDrawable(mIcon);
+                FastBitmapDrawable drawable = mLauncher.createIconDrawable(mIcon);
                 mCenterDrawable = new PreloadIconDrawable(drawable, sPreloaderTheme);
                 mCenterDrawable.setCallback(this);
                 mTopCornerDrawable = null;
diff --git a/src/com/android/launcher3/SettingsActivity.java b/src/com/android/launcher3/SettingsActivity.java
index a1da1b6..27763f5 100644
--- a/src/com/android/launcher3/SettingsActivity.java
+++ b/src/com/android/launcher3/SettingsActivity.java
@@ -18,12 +18,14 @@
 
 import android.app.Activity;
 import android.content.Context;
+import android.content.Intent;
 import android.os.Bundle;
+import android.preference.Preference;
 import android.preference.PreferenceFragment;
+import android.preference.PreferenceScreen;
 
 /**
- * Settings activity for Launcher. Currently implements the following setting:
- * LockToPortrait
+ * Settings activity for Launcher. Currently implements the following setting: Allow rotation
  */
 public class SettingsActivity extends Activity {
     @Override
@@ -41,13 +43,25 @@
      */
     @SuppressWarnings("WeakerAccess")
     public static class LauncherSettingsFragment extends PreferenceFragment {
-
         @Override
         public void onCreate(Bundle savedInstanceState) {
             super.onCreate(savedInstanceState);
-            getPreferenceManager().setSharedPreferencesMode(Context.MODE_PRIVATE);
+            getPreferenceManager().setSharedPreferencesMode(Context.MODE_MULTI_PROCESS);
             getPreferenceManager().setSharedPreferencesName(LauncherFiles.ROTATION_PREF_FILE);
             addPreferencesFromResource(R.xml.launcher_preferences);
         }
+
+        @Override
+        public boolean onPreferenceTreeClick(PreferenceScreen preferenceScreen,
+                                             Preference preference) {
+            boolean allowRotation = getPreferenceManager().getSharedPreferences().getBoolean(
+                    Utilities.ALLOW_ROTATION_PREFERENCE_KEY, false);
+            Intent rotationSetting = new Intent(Utilities.SCREEN_ROTATION_SETTING_INTENT);
+            String launchBroadcastPermission = getResources().getString(
+                            R.string.receive_update_orientation_broadcasts_permission);
+            rotationSetting.putExtra(Utilities.SCREEN_ROTATION_SETTING_EXTRA, allowRotation);
+            getActivity().sendBroadcast(rotationSetting, launchBroadcastPermission);
+            return true;
+        }
     }
 }
diff --git a/src/com/android/launcher3/Stats.java b/src/com/android/launcher3/Stats.java
index 9d06f75..cb0e252 100644
--- a/src/com/android/launcher3/Stats.java
+++ b/src/com/android/launcher3/Stats.java
@@ -20,9 +20,63 @@
 import android.content.Context;
 import android.content.Intent;
 import android.content.IntentFilter;
+import android.os.Bundle;
 import android.util.Log;
+import android.view.View;
+import android.view.ViewParent;
 
 public class Stats {
+
+    /**
+     * Implemented by containers to provide a launch source for a given child.
+     */
+    public interface LaunchSourceProvider {
+        void fillInLaunchSourceData(Bundle sourceData);
+    }
+
+    /**
+     * Helpers to add the source to a launch intent.
+     */
+    public static class LaunchSourceUtils {
+        /**
+         * Create a default bundle for LaunchSourceProviders to fill in their data.
+         */
+        public static Bundle createSourceData() {
+            Bundle sourceData = new Bundle();
+            sourceData.putString(SOURCE_EXTRA_CONTAINER, CONTAINER_HOMESCREEN);
+            // Have default container/sub container pages
+            sourceData.putInt(SOURCE_EXTRA_CONTAINER_PAGE, 0);
+            sourceData.putInt(SOURCE_EXTRA_SUB_CONTAINER_PAGE, 0);
+            return sourceData;
+        }
+
+        /**
+         * Finds the next launch source provider in the parents of the view hierarchy and populates
+         * the source data from that provider.
+         */
+        public static void populateSourceDataFromAncestorProvider(View v, Bundle sourceData) {
+            if (v == null) {
+                return;
+            }
+
+            Stats.LaunchSourceProvider provider = null;
+            ViewParent parent = v.getParent();
+            while (parent != null && parent instanceof View) {
+                if (parent instanceof Stats.LaunchSourceProvider) {
+                    provider = (Stats.LaunchSourceProvider) parent;
+                    break;
+                }
+                parent = parent.getParent();
+            }
+
+            if (provider != null) {
+                provider.fillInLaunchSourceData(sourceData);
+            } else if (LauncherAppState.isDogfoodBuild()) {
+                throw new RuntimeException("Expected LaunchSourceProvider");
+            }
+        }
+    }
+
     private static final boolean DEBUG_BROADCASTS = false;
 
     public static final String ACTION_LAUNCH = "com.android.launcher3.action.LAUNCH";
@@ -31,6 +85,22 @@
     public static final String EXTRA_SCREEN = "screen";
     public static final String EXTRA_CELLX = "cellX";
     public static final String EXTRA_CELLY = "cellY";
+    public static final String EXTRA_SOURCE = "source";
+
+    public static final String SOURCE_EXTRA_CONTAINER = "container";
+    public static final String SOURCE_EXTRA_CONTAINER_PAGE = "container_page";
+    public static final String SOURCE_EXTRA_SUB_CONTAINER = "sub_container";
+    public static final String SOURCE_EXTRA_SUB_CONTAINER_PAGE = "sub_container_page";
+
+    public static final String CONTAINER_SEARCH_BOX = "search_box";
+    public static final String CONTAINER_ALL_APPS = "all_apps";
+    public static final String CONTAINER_HOMESCREEN = "homescreen"; // aka. Workspace
+    public static final String CONTAINER_HOTSEAT = "hotseat";
+
+    public static final String SUB_CONTAINER_FOLDER = "folder";
+    public static final String SUB_CONTAINER_ALL_APPS_A_Z = "a-z";
+    public static final String SUB_CONTAINER_ALL_APPS_PREDICTION = "prediction";
+    public static final String SUB_CONTAINER_ALL_APPS_SEARCH = "search";
 
     private final Launcher mLauncher;
     private final String mLaunchBroadcastPermission;
@@ -56,11 +126,7 @@
         }
     }
 
-    public void recordLaunch(Intent intent) {
-        recordLaunch(intent, null);
-    }
-
-    public void recordLaunch(Intent intent, ShortcutInfo shortcut) {
+    public void recordLaunch(View v, Intent intent, ShortcutInfo shortcut) {
         intent = new Intent(intent);
         intent.setSourceBounds(null);
 
@@ -72,6 +138,10 @@
                     .putExtra(EXTRA_CELLX, shortcut.cellX)
                     .putExtra(EXTRA_CELLY, shortcut.cellY);
         }
+
+        Bundle sourceExtras = LaunchSourceUtils.createSourceData();
+        LaunchSourceUtils.populateSourceDataFromAncestorProvider(v, sourceExtras);
+        broadcastIntent.putExtra(EXTRA_SOURCE, sourceExtras);
         mLauncher.sendBroadcast(broadcastIntent, mLaunchBroadcastPermission);
     }
 }
diff --git a/src/com/android/launcher3/StylusEventHelper.java b/src/com/android/launcher3/StylusEventHelper.java
new file mode 100644
index 0000000..da46e6a
--- /dev/null
+++ b/src/com/android/launcher3/StylusEventHelper.java
@@ -0,0 +1,84 @@
+package com.android.launcher3;
+
+import com.android.launcher3.Utilities;
+
+import android.util.Log;
+import android.view.MotionEvent;
+import android.view.View;
+import android.view.ViewConfiguration;
+
+/**
+ * Helper for identifying when a stylus touches a view while the primary stylus button is pressed.
+ * This can occur in {@value MotionEvent#ACTION_DOWN} or {@value MotionEvent#ACTION_MOVE}. On a
+ * stylus button press this performs the view's {@link View#performLongClick()} method, if the view
+ * is long clickable.
+ */
+public class StylusEventHelper {
+    private boolean mIsButtonPressed;
+    private View mView;
+
+    public StylusEventHelper(View view) {
+        mView = view;
+    }
+
+    /**
+     * Call this in onTouchEvent method of a view to identify a stylus button press and perform a
+     * long click (if the view is long clickable).
+     *
+     * @param event The event to check for a stylus button press.
+     * @return Whether a stylus event occurred and was handled.
+     */
+    public boolean checkAndPerformStylusEvent(MotionEvent event) {
+        final float slop = ViewConfiguration.get(mView.getContext()).getScaledTouchSlop();
+
+        if (!mView.isLongClickable()) {
+            // We don't do anything unless the view is long clickable.
+            return false;
+        }
+
+        final boolean stylusButtonPressed = isStylusButtonPressed(event);
+        switch (event.getAction()) {
+            case MotionEvent.ACTION_DOWN:
+                mIsButtonPressed = false;
+                if (stylusButtonPressed && mView.performLongClick()) {
+                    mIsButtonPressed = true;
+                    return true;
+                }
+                break;
+            case MotionEvent.ACTION_MOVE:
+                if (Utilities.pointInView(mView, event.getX(), event.getY(), slop)) {
+                    if (!mIsButtonPressed && stylusButtonPressed && mView.performLongClick()) {
+                        mIsButtonPressed = true;
+                        return true;
+                    } else if (mIsButtonPressed && !stylusButtonPressed) {
+                        mIsButtonPressed = false;
+                    }
+                }
+                break;
+            case MotionEvent.ACTION_UP:
+            case MotionEvent.ACTION_CANCEL:
+                mIsButtonPressed = false;
+                break;
+        }
+        return false;
+    }
+
+    /**
+     * Whether a stylus button press is occurring.
+     */
+    public boolean inStylusButtonPressed() {
+        return mIsButtonPressed;
+    }
+
+    /**
+     * Identifies if the provided {@link MotionEvent} is a stylus with the primary stylus button
+     * pressed.
+     *
+     * @param event The event to check.
+     * @return Whether a stylus button press occurred.
+     */
+    public static boolean isStylusButtonPressed(MotionEvent event) {
+        return event.getToolType(0) == MotionEvent.TOOL_TYPE_STYLUS
+                && event.isButtonPressed(MotionEvent.BUTTON_SECONDARY);
+    }
+}
\ No newline at end of file
diff --git a/src/com/android/launcher3/Utilities.java b/src/com/android/launcher3/Utilities.java
index a9cbf69..b267f75 100644
--- a/src/com/android/launcher3/Utilities.java
+++ b/src/com/android/launcher3/Utilities.java
@@ -71,9 +71,6 @@
 
     private static final String TAG = "Launcher.Utilities";
 
-    private static int sIconWidth = -1;
-    private static int sIconHeight = -1;
-
     private static final Rect sOldBounds = new Rect();
     private static final Canvas sCanvas = new Canvas();
 
@@ -87,32 +84,18 @@
     static int sColors[] = { 0xffff0000, 0xff00ff00, 0xff0000ff };
     static int sColorIndex = 0;
 
-    static int[] sLoc0 = new int[2];
-    static int[] sLoc1 = new int[2];
+    private static final int[] sLoc0 = new int[2];
+    private static final int[] sLoc1 = new int[2];
 
     // To turn on these properties, type
     // adb shell setprop log.tag.PROPERTY_NAME [VERBOSE | SUPPRESS]
-    static final String FORCE_ENABLE_ROTATION_PROPERTY = "launcher_force_rotate";
-    public static boolean sForceEnableRotation = isPropertyEnabled(FORCE_ENABLE_ROTATION_PROPERTY);
+    private static final String FORCE_ENABLE_ROTATION_PROPERTY = "launcher_force_rotate";
+    private static boolean sForceEnableRotation = isPropertyEnabled(FORCE_ENABLE_ROTATION_PROPERTY);
 
     public static final String ALLOW_ROTATION_PREFERENCE_KEY = "pref_allowRotation";
-
-    /**
-     * Returns a FastBitmapDrawable with the icon, accurately sized.
-     */
-    public static FastBitmapDrawable createIconDrawable(Bitmap icon) {
-        FastBitmapDrawable d = new FastBitmapDrawable(icon);
-        d.setFilterBitmap(true);
-        resizeIconDrawable(d);
-        return d;
-    }
-
-    /**
-     * Resizes an icon drawable to the correct icon size.
-     */
-    static void resizeIconDrawable(Drawable icon) {
-        icon.setBounds(0, 0, sIconWidth, sIconHeight);
-    }
+    public static final String SCREEN_ROTATION_SETTING_INTENT =
+            "come.android.launcher3.SCREEN_ORIENTATION_PREF_CHANGED";
+    public static final String SCREEN_ROTATION_SETTING_EXTRA = "screenRotationPref";
 
     public static boolean isPropertyEnabled(String propertyName) {
         return Log.isLoggable(propertyName, Log.VERBOSE);
@@ -141,7 +124,7 @@
         return Build.VERSION.SDK_INT >= 22;
     }
 
-    static Bitmap createIconBitmap(Cursor c, int iconIndex, Context context) {
+    public static Bitmap createIconBitmap(Cursor c, int iconIndex, Context context) {
         byte[] data = c.getBlob(iconIndex);
         try {
             return createIconBitmap(BitmapFactory.decodeByteArray(data, 0, data.length), context);
@@ -154,7 +137,7 @@
      * Returns a bitmap suitable for the all apps view. If the package or the resource do not
      * exist, it returns null.
      */
-    static Bitmap createIconBitmap(String packageName, String resourceName, IconCache cache,
+    public static Bitmap createIconBitmap(String packageName, String resourceName,
             Context context) {
         PackageManager packageManager = context.getPackageManager();
         // the resource
@@ -163,7 +146,8 @@
             if (resources != null) {
                 final int id = resources.getIdentifier(resourceName, null, null);
                 return createIconBitmap(
-                        resources.getDrawableForDensity(id, cache.getFullResIconDpi()), context);
+                        resources.getDrawableForDensity(id, LauncherAppState.getInstance()
+                                .getInvariantDeviceProfile().fillResIconDpi), context);
             }
         } catch (Exception e) {
             // Icon not found.
@@ -171,16 +155,16 @@
         return null;
     }
 
+    private static int getIconBitmapSize() {
+        return LauncherAppState.getInstance().getInvariantDeviceProfile().iconBitmapSize;
+    }
+
     /**
      * Returns a bitmap which is of the appropriate size to be displayed as an icon
      */
-    static Bitmap createIconBitmap(Bitmap icon, Context context) {
-        synchronized (sCanvas) { // we share the statics :-(
-            if (sIconWidth == -1) {
-                initStatics(context);
-            }
-        }
-        if (sIconWidth == icon.getWidth() && sIconHeight == icon.getHeight()) {
+    public static Bitmap createIconBitmap(Bitmap icon, Context context) {
+        final int iconBitmapSize = getIconBitmapSize();
+        if (iconBitmapSize == icon.getWidth() && iconBitmapSize == icon.getHeight()) {
             return icon;
         }
         return createIconBitmap(new BitmapDrawable(context.getResources(), icon), context);
@@ -190,13 +174,11 @@
      * Returns a bitmap suitable for the all apps view.
      */
     public static Bitmap createIconBitmap(Drawable icon, Context context) {
-        synchronized (sCanvas) { // we share the statics :-(
-            if (sIconWidth == -1) {
-                initStatics(context);
-            }
+        synchronized (sCanvas) {
+            final int iconBitmapSize = getIconBitmapSize();
 
-            int width = sIconWidth;
-            int height = sIconHeight;
+            int width = iconBitmapSize;
+            int height = iconBitmapSize;
 
             if (icon instanceof PaintDrawable) {
                 PaintDrawable painter = (PaintDrawable) icon;
@@ -223,8 +205,8 @@
             }
 
             // no intrinsic size --> use default size
-            int textureWidth = sIconWidth;
-            int textureHeight = sIconHeight;
+            int textureWidth = iconBitmapSize;
+            int textureHeight = iconBitmapSize;
 
             final Bitmap bitmap = Bitmap.createBitmap(textureWidth, textureHeight,
                     Bitmap.Config.ARGB_8888);
@@ -354,15 +336,6 @@
                 localY < (v.getHeight() + slop);
     }
 
-    private static void initStatics(Context context) {
-        final Resources resources = context.getResources();
-        sIconWidth = sIconHeight = (int) resources.getDimension(R.dimen.app_icon_size);
-    }
-
-    public static void setIconSize(int widthPx) {
-        sIconWidth = sIconHeight = widthPx;
-    }
-
     public static void scaleRect(Rect r, float scale) {
         if (scale != 1.0f) {
             r.left = (int) (r.left * scale + 0.5f);
diff --git a/src/com/android/launcher3/WidgetPreviewLoader.java b/src/com/android/launcher3/WidgetPreviewLoader.java
index e8cc486..a621771 100644
--- a/src/com/android/launcher3/WidgetPreviewLoader.java
+++ b/src/com/android/launcher3/WidgetPreviewLoader.java
@@ -56,7 +56,7 @@
      * Weak reference objects, do not prevent their referents from being made finalizable,
      * finalized, and then reclaimed.
      */
-    private Set<Bitmap> mUnusedBitmaps =
+    @Thunk Set<Bitmap> mUnusedBitmaps =
             Collections.newSetFromMap(new WeakHashMap<Bitmap, Boolean>());
 
     private final Context mContext;
@@ -67,7 +67,7 @@
     private final InvariantDeviceProfile mDeviceProfile;
 
     private final MainThreadExecutor mMainThreadExecutor = new MainThreadExecutor();
-    private final Handler mWorkerHandler;
+    @Thunk final Handler mWorkerHandler;
 
     public WidgetPreviewLoader(Context context, InvariantDeviceProfile inv, IconCache iconCache) {
         mContext = context;
@@ -290,7 +290,7 @@
     /**
      * Reads the preview bitmap from the DB or null if the preview is not in the DB.
      */
-    private Bitmap readFromDb(WidgetCacheKey key, Bitmap recycle, PreviewLoadTask loadTask) {
+    @Thunk Bitmap readFromDb(WidgetCacheKey key, Bitmap recycle, PreviewLoadTask loadTask) {
         Cursor cursor = null;
         try {
             cursor = mDb.getReadableDatabase().query(
@@ -329,7 +329,7 @@
         return null;
     }
 
-    private Bitmap generatePreview(Launcher launcher, Object info, Bitmap recycle,
+    @Thunk Bitmap generatePreview(Launcher launcher, Object info, Bitmap recycle,
             int previewWidth, int previewHeight) {
         if (info instanceof LauncherAppWidgetProviderInfo) {
             return generateWidgetPreview(launcher, (LauncherAppWidgetProviderInfo) info,
@@ -512,7 +512,7 @@
     /**
      * @return an array of containing versionCode and lastUpdatedTime for the package.
      */
-    private long[] getPackageVersion(String packageName) {
+    @Thunk long[] getPackageVersion(String packageName) {
         synchronized (mPackageVersions) {
             long[] versions = mPackageVersions.get(packageName);
             if (versions == null) {
@@ -561,14 +561,13 @@
     }
 
     public class PreviewLoadTask extends AsyncTask<Void, Void, Bitmap> {
-
-        private final WidgetCacheKey mKey;
+        @Thunk final WidgetCacheKey mKey;
         private final Object mInfo;
         private final int mPreviewHeight;
         private final int mPreviewWidth;
         private final WidgetCell mCaller;
-        private long[] mVersions;
-        private Bitmap mBitmapToRecycle;
+        @Thunk long[] mVersions;
+        @Thunk Bitmap mBitmapToRecycle;
 
         PreviewLoadTask(WidgetCacheKey key, Object info, int previewWidth,
                 int previewHeight, WidgetCell caller) {
@@ -674,7 +673,7 @@
     private static final class WidgetCacheKey extends ComponentKey {
 
         // TODO: remove dependency on size
-        private final String size;
+        @Thunk final String size;
 
         public WidgetCacheKey(ComponentName componentName, UserHandleCompat user, String size) {
             super(componentName, user);
diff --git a/src/com/android/launcher3/Workspace.java b/src/com/android/launcher3/Workspace.java
index 6d5affb..d0b9a22 100644
--- a/src/com/android/launcher3/Workspace.java
+++ b/src/com/android/launcher3/Workspace.java
@@ -28,6 +28,7 @@
 import android.appwidget.AppWidgetProviderInfo;
 import android.content.ComponentName;
 import android.content.Context;
+import android.content.Intent;
 import android.content.SharedPreferences;
 import android.content.res.Resources;
 import android.content.res.TypedArray;
@@ -42,6 +43,7 @@
 import android.graphics.drawable.Drawable;
 import android.os.AsyncTask;
 import android.os.Build;
+import android.os.Bundle;
 import android.os.Handler;
 import android.os.IBinder;
 import android.os.Parcelable;
@@ -86,7 +88,7 @@
 public class Workspace extends PagedView
         implements DropTarget, DragSource, DragScroller, View.OnTouchListener,
         DragController.DragListener, LauncherTransitionable, ViewGroup.OnHierarchyChangeListener,
-        Insettable, UninstallSource, AccessibilityDragSource {
+        Insettable, UninstallSource, AccessibilityDragSource, Stats.LaunchSourceProvider {
     private static final String TAG = "Launcher.Workspace";
 
     private static boolean ENFORCE_DRAG_EVENT_ORDER = false;
@@ -1618,7 +1620,7 @@
         // We should only update the drag layer background alpha if we are not in all apps or the
         // widgets tray
         if (mState == State.NORMAL) {
-            mLauncher.getDragLayer().setBackgroundAlpha(progress * 0.8f);
+            mLauncher.getDragLayer().setBackgroundAlpha(progress == 1 ? 0 : progress * 0.8f);
         }
 
         if (mLauncher.getHotseat() != null) {
@@ -4461,6 +4463,12 @@
         mLauncher.getDragLayer().getLocationInDragLayer(this, loc);
     }
 
+    @Override
+    public void fillInLaunchSourceData(Bundle sourceData) {
+        sourceData.putString(Stats.SOURCE_EXTRA_CONTAINER, Stats.CONTAINER_HOMESCREEN);
+        sourceData.putInt(Stats.SOURCE_EXTRA_CONTAINER_PAGE, getCurrentPage());
+    }
+
     /**
      * Used as a workaround to ensure that the AppWidgetService receives the
      * PACKAGE_ADDED broadcast before updating widgets.
diff --git a/src/com/android/launcher3/accessibility/LauncherAccessibilityDelegate.java b/src/com/android/launcher3/accessibility/LauncherAccessibilityDelegate.java
index 93cf8d0..3c49ccc 100644
--- a/src/com/android/launcher3/accessibility/LauncherAccessibilityDelegate.java
+++ b/src/com/android/launcher3/accessibility/LauncherAccessibilityDelegate.java
@@ -251,7 +251,7 @@
         return actions;
     }
 
-    private void performResizeAction(int action, View host, LauncherAppWidgetInfo info) {
+    @Thunk void performResizeAction(int action, View host, LauncherAppWidgetInfo info) {
         CellLayout.LayoutParams lp = (CellLayout.LayoutParams) host.getLayoutParams();
         CellLayout layout = (CellLayout) host.getParent().getParent();
         layout.markCellsAsUnoccupiedForView(host);
diff --git a/src/com/android/launcher3/allapps/AllAppsContainerView.java b/src/com/android/launcher3/allapps/AllAppsContainerView.java
index c05f7c0..9386500 100644
--- a/src/com/android/launcher3/allapps/AllAppsContainerView.java
+++ b/src/com/android/launcher3/allapps/AllAppsContainerView.java
@@ -26,6 +26,7 @@
 import android.graphics.drawable.GradientDrawable;
 import android.graphics.drawable.InsetDrawable;
 import android.os.Build;
+import android.os.Bundle;
 import android.support.v7.widget.RecyclerView;
 import android.text.Editable;
 import android.text.TextWatcher;
@@ -57,6 +58,7 @@
 import com.android.launcher3.Launcher;
 import com.android.launcher3.LauncherTransitionable;
 import com.android.launcher3.R;
+import com.android.launcher3.Stats;
 import com.android.launcher3.Utilities;
 import com.android.launcher3.Workspace;
 import com.android.launcher3.allapps.AppSearchManager.AppSearchResultCallback;
@@ -172,7 +174,7 @@
         TextWatcher, TextView.OnEditorActionListener, LauncherTransitionable,
         AlphabeticalAppsList.AdapterChangedCallback, AllAppsGridAdapter.PredictionBarSpacerCallbacks,
         View.OnTouchListener, View.OnClickListener, View.OnLongClickListener,
-        ViewTreeObserver.OnPreDrawListener, AppSearchResultCallback {
+        ViewTreeObserver.OnPreDrawListener, AppSearchResultCallback, Stats.LaunchSourceProvider {
 
     public static final boolean GRID_MERGE_SECTIONS = true;
 
@@ -191,14 +193,14 @@
     private RecyclerView.LayoutManager mLayoutManager;
     private RecyclerView.ItemDecoration mItemDecoration;
 
-    private FrameLayout mContentView;
+    @Thunk FrameLayout mContentView;
     @Thunk AllAppsRecyclerView mAppsRecyclerView;
-    private ViewGroup mPredictionBarView;
+    @Thunk ViewGroup mPredictionBarView;
     private View mHeaderView;
-    private View mSearchBarContainerView;
+    @Thunk View mSearchBarContainerView;
     private View mSearchButtonView;
     private View mDismissSearchButtonView;
-    private AllAppsSearchEditView mSearchBarEditView;
+    @Thunk AllAppsSearchEditView mSearchBarEditView;
 
     private HeaderElevationController mElevationController;
 
@@ -215,7 +217,7 @@
     private int mContainerInset;
     private int mPredictionBarHeight;
     private int mLastRecyclerViewScrollPos = -1;
-    private boolean mFocusPredictionBarOnFirstBind;
+    @Thunk boolean mFocusPredictionBarOnFirstBind;
 
     private CheckLongPressHelper mPredictionIconCheckForLongPress;
     private View mPredictionIconUnderTouch;
@@ -870,6 +872,15 @@
         return false;
     }
 
+    @Override
+    public void fillInLaunchSourceData(Bundle sourceData) {
+        // Since the other cases are caught by the AllAppsRecyclerView LaunchSourceProvider, we just
+        // handle the prediction bar icons here
+        sourceData.putString(Stats.SOURCE_EXTRA_CONTAINER, Stats.CONTAINER_ALL_APPS);
+        sourceData.putString(Stats.SOURCE_EXTRA_SUB_CONTAINER,
+                Stats.SUB_CONTAINER_ALL_APPS_PREDICTION);
+    }
+
     /**
      * Returns the predicted app in the prediction bar given a set of local coordinates.
      */
@@ -936,7 +947,7 @@
     /**
      * Hides the search field.
      */
-    private void hideSearchField(boolean animated, final boolean returnFocusToRecyclerView) {
+    @Thunk void hideSearchField(boolean animated, final boolean returnFocusToRecyclerView) {
         mSearchManager.cancel(true);
 
         final boolean resetTextField = mSearchBarEditView.getText().toString().length() > 0;
@@ -1001,7 +1012,7 @@
     /**
      * Returns an input method manager.
      */
-    private InputMethodManager getInputMethodManager() {
+    @Thunk InputMethodManager getInputMethodManager() {
         return (InputMethodManager) getContext().getSystemService(Context.INPUT_METHOD_SERVICE);
     }
 }
diff --git a/src/com/android/launcher3/allapps/AllAppsGridAdapter.java b/src/com/android/launcher3/allapps/AllAppsGridAdapter.java
index e010270..307d940 100644
--- a/src/com/android/launcher3/allapps/AllAppsGridAdapter.java
+++ b/src/com/android/launcher3/allapps/AllAppsGridAdapter.java
@@ -288,7 +288,7 @@
     private GridLayoutManager mGridLayoutMgr;
     private GridSpanSizer mGridSizer;
     private GridItemDecoration mItemDecoration;
-    private PredictionBarSpacerCallbacks mPredictionBarCb;
+    @Thunk PredictionBarSpacerCallbacks mPredictionBarCb;
     private View.OnTouchListener mTouchListener;
     private View.OnClickListener mIconClickListener;
     private View.OnLongClickListener mIconLongClickListener;
diff --git a/src/com/android/launcher3/allapps/AllAppsRecyclerView.java b/src/com/android/launcher3/allapps/AllAppsRecyclerView.java
index cc5add3..e1b5d91 100644
--- a/src/com/android/launcher3/allapps/AllAppsRecyclerView.java
+++ b/src/com/android/launcher3/allapps/AllAppsRecyclerView.java
@@ -18,14 +18,15 @@
 import android.content.Context;
 import android.graphics.Rect;
 import android.graphics.drawable.Drawable;
+import android.os.Bundle;
 import android.support.v7.widget.LinearLayoutManager;
 import android.support.v7.widget.RecyclerView;
 import android.util.AttributeSet;
 import android.view.View;
-
 import com.android.launcher3.BaseRecyclerView;
 import com.android.launcher3.DeviceProfile;
 import com.android.launcher3.Launcher;
+import com.android.launcher3.Stats;
 import com.android.launcher3.Utilities;
 
 import java.util.List;
@@ -33,7 +34,8 @@
 /**
  * A RecyclerView with custom fast scroll support for the all apps view.
  */
-public class AllAppsRecyclerView extends BaseRecyclerView {
+public class AllAppsRecyclerView extends BaseRecyclerView
+        implements Stats.LaunchSourceProvider {
 
     private AlphabeticalAppsList mApps;
     private int mNumAppsPerRow;
@@ -125,6 +127,18 @@
         addOnItemTouchListener(this);
     }
 
+    @Override
+    public void fillInLaunchSourceData(Bundle sourceData) {
+        sourceData.putString(Stats.SOURCE_EXTRA_CONTAINER, Stats.CONTAINER_ALL_APPS);
+        if (mApps.hasFilter()) {
+            sourceData.putString(Stats.SOURCE_EXTRA_SUB_CONTAINER,
+                    Stats.SUB_CONTAINER_ALL_APPS_SEARCH);
+        } else {
+            sourceData.putString(Stats.SOURCE_EXTRA_SUB_CONTAINER,
+                    Stats.SUB_CONTAINER_ALL_APPS_A_Z);
+        }
+    }
+
     /**
      * Maps the touch (from 0..1) to the adapter position that should be visible.
      */
diff --git a/src/com/android/launcher3/allapps/AlphabeticalAppsList.java b/src/com/android/launcher3/allapps/AlphabeticalAppsList.java
index 0dc2d1e..e284f77 100644
--- a/src/com/android/launcher3/allapps/AlphabeticalAppsList.java
+++ b/src/com/android/launcher3/allapps/AlphabeticalAppsList.java
@@ -27,9 +27,10 @@
 import com.android.launcher3.compat.AlphabeticIndexCompat;
 import com.android.launcher3.model.AbstractUserComparator;
 import com.android.launcher3.model.AppNameComparator;
+import com.android.launcher3.util.Thunk;
 
+import java.nio.charset.Charset;
 import java.nio.charset.CharsetEncoder;
-import java.nio.charset.StandardCharsets;
 import java.util.ArrayList;
 import java.util.Collections;
 import java.util.HashMap;
@@ -45,6 +46,7 @@
 
     public static final String TAG = "AlphabeticalAppsList";
     private static final boolean DEBUG = false;
+    private static final boolean DEBUG_PREDICTIONS = false;
 
     /**
      * Info about a section in the alphabetic list
@@ -151,7 +153,7 @@
      * The logic we use to merge sections on tablets.  Currently, we don't show section names on
      * tablet layouts, so just merge all the sections indiscriminately.
      */
-    private static class TabletMergeAlgorithm implements MergeAlgorithm {
+    @Thunk static class TabletMergeAlgorithm implements MergeAlgorithm {
 
         @Override
         public boolean continueMerging(SectionInfo section, SectionInfo withSection,
@@ -177,7 +179,7 @@
             mMinAppsPerRow = minAppsPerRow;
             mMinRowsInMergedSection = minRowsInMergedSection;
             mMaxAllowableMerges = maxNumMerges;
-            mAsciiEncoder = StandardCharsets.US_ASCII.newEncoder();
+            mAsciiEncoder = Charset.forName("US-ASCII").newEncoder();
         }
 
         @Override
@@ -476,6 +478,15 @@
         mAdapterItems.clear();
         mSections.clear();
 
+        if (DEBUG_PREDICTIONS) {
+            if (mPredictedAppComponents.isEmpty() && !mApps.isEmpty()) {
+                mPredictedAppComponents.add(mApps.get(0).componentName);
+                mPredictedAppComponents.add(mApps.get(0).componentName);
+                mPredictedAppComponents.add(mApps.get(0).componentName);
+                mPredictedAppComponents.add(mApps.get(0).componentName);
+            }
+        }
+
         // Process the predicted app components
         mPredictedApps.clear();
         if (mPredictedAppComponents != null && !mPredictedAppComponents.isEmpty() && !hasFilter()) {
diff --git a/src/com/android/launcher3/model/AppNameComparator.java b/src/com/android/launcher3/model/AppNameComparator.java
index cdac40a..cd45d2c 100644
--- a/src/com/android/launcher3/model/AppNameComparator.java
+++ b/src/com/android/launcher3/model/AppNameComparator.java
@@ -19,6 +19,7 @@
 
 import com.android.launcher3.AppInfo;
 import com.android.launcher3.ItemInfo;
+import com.android.launcher3.util.Thunk;
 
 import java.text.Collator;
 import java.util.Comparator;
@@ -82,7 +83,7 @@
     /**
      * Compares two titles with the same return value semantics as Comparator.
      */
-    private int compareTitles(String titleA, String titleB) {
+    @Thunk int compareTitles(String titleA, String titleB) {
         // Ensure that we de-prioritize any titles that don't start with a linguistic letter or digit
         boolean aStartsWithLetter = Character.isLetterOrDigit(titleA.codePointAt(0));
         boolean bStartsWithLetter = Character.isLetterOrDigit(titleB.codePointAt(0));
diff --git a/src/com/android/launcher3/model/PackageItemInfo.java b/src/com/android/launcher3/model/PackageItemInfo.java
index 0f0134a..30f228c 100644
--- a/src/com/android/launcher3/model/PackageItemInfo.java
+++ b/src/com/android/launcher3/model/PackageItemInfo.java
@@ -16,7 +16,6 @@
 
 package com.android.launcher3.model;
 
-import android.content.ComponentName;
 import android.graphics.Bitmap;
 
 import com.android.launcher3.ItemInfo;
@@ -27,7 +26,6 @@
  * Represents a {@link Package} in the widget tray section.
  */
 public class PackageItemInfo extends ItemInfo {
-    private static final String TAG = "PackageInfo";
 
     /**
      * A bitmap version of the application icon.
@@ -35,12 +33,21 @@
     public Bitmap iconBitmap;
 
     /**
-     * Indicates whether we're using a low res icon
+     * Indicates whether we're using a low res icon.
      */
     public boolean usingLowResIcon;
 
+    /**
+     * Package name of the {@link ItemInfo}.
+     */
     public String packageName;
 
+    /**
+     * Character that is used as a section name for the {@link ItemInfo#title}.
+     * (e.g., "G" will be stored if title is "Google")
+     */
+    public String titleSectionName;
+
     int flags = 0;
 
     PackageItemInfo(String packageName) {
diff --git a/src/com/android/launcher3/model/WidgetsModel.java b/src/com/android/launcher3/model/WidgetsModel.java
index fdb9795..625d4d6 100644
--- a/src/com/android/launcher3/model/WidgetsModel.java
+++ b/src/com/android/launcher3/model/WidgetsModel.java
@@ -8,8 +8,8 @@
 import com.android.launcher3.IconCache;
 import com.android.launcher3.LauncherAppState;
 import com.android.launcher3.LauncherAppWidgetProviderInfo;
-
 import com.android.launcher3.Utilities;
+import com.android.launcher3.compat.AlphabeticIndexCompat;
 import com.android.launcher3.compat.UserHandleCompat;
 
 import java.util.ArrayList;
@@ -39,11 +39,13 @@
     private final Comparator mWidgetAndShortcutNameComparator;
     private final Comparator mAppNameComparator;
     private final IconCache mIconCache;
+    private AlphabeticIndexCompat mIndexer;
 
     public WidgetsModel(Context context) {
         mWidgetAndShortcutNameComparator = new WidgetsAndShortcutNameComparator(context);
         mAppNameComparator = (new AppNameComparator(context)).getAppInfoComparator();
         mIconCache = LauncherAppState.getInstance().getIconCache();
+        mIndexer = new AlphabeticIndexCompat(context);
     }
 
     private WidgetsModel(WidgetsModel model) {
@@ -62,6 +64,9 @@
 
     // Access methods that may be deleted if the private fields are made package-private.
     public PackageItemInfo getPackageItemInfo(int pos) {
+        if (pos >= mPackageItemInfos.size() || pos < 0) {
+            return null;
+        }
         return mPackageItemInfos.get(pos);
     }
 
@@ -112,6 +117,7 @@
                 pInfo = new PackageItemInfo(packageName);
                 mIconCache.getTitleAndIconForApp(packageName, UserHandleCompat.myUserHandle(),
                         true /* userLowResIcon */, pInfo);
+                pInfo.titleSectionName = mIndexer.computeSectionName(pInfo.title);
                 mWidgetsList.put(pInfo, widgetsShortcutsList);
                 tmpPackageItemInfos.put(packageName,  pInfo);
                 mPackageItemInfos.add(pInfo);
diff --git a/src/com/android/launcher3/util/LongArrayMap.java b/src/com/android/launcher3/util/LongArrayMap.java
index e3c96cd..a337e85 100644
--- a/src/com/android/launcher3/util/LongArrayMap.java
+++ b/src/com/android/launcher3/util/LongArrayMap.java
@@ -43,7 +43,7 @@
         return new ValueIterator();
     }
 
-    private class ValueIterator implements Iterator<E> {
+    @Thunk class ValueIterator implements Iterator<E> {
 
         private int mNextIndex = 0;
 
diff --git a/src/com/android/launcher3/widget/WidgetCell.java b/src/com/android/launcher3/widget/WidgetCell.java
index 3ec1645..2714f51 100644
--- a/src/com/android/launcher3/widget/WidgetCell.java
+++ b/src/com/android/launcher3/widget/WidgetCell.java
@@ -23,6 +23,7 @@
 import android.graphics.Bitmap;
 import android.util.AttributeSet;
 import android.util.Log;
+import android.view.MotionEvent;
 import android.view.View;
 import android.view.View.OnLayoutChangeListener;
 import android.widget.LinearLayout;
@@ -35,6 +36,7 @@
 import com.android.launcher3.LauncherAppState;
 import com.android.launcher3.LauncherAppWidgetProviderInfo;
 import com.android.launcher3.R;
+import com.android.launcher3.StylusEventHelper;
 import com.android.launcher3.WidgetPreviewLoader;
 import com.android.launcher3.WidgetPreviewLoader.PreviewLoadRequest;
 import com.android.launcher3.compat.AppWidgetManagerCompat;
@@ -73,6 +75,7 @@
 
     private WidgetPreviewLoader mWidgetPreviewLoader;
     private PreviewLoadRequest mActiveRequest;
+    private StylusEventHelper mStylusEventHelper;
 
     private Launcher mLauncher;
 
@@ -89,6 +92,7 @@
 
         final Resources r = context.getResources();
         mLauncher = (Launcher) context;
+        mStylusEventHelper = new StylusEventHelper(this);
 
         mDimensionsFormatString = r.getString(R.string.widget_dims_format);
         setContainerWidth();
@@ -202,6 +206,15 @@
         return Math.min(size[0], info.spanX * cellWidth);
     }
 
+    @Override
+    public boolean onTouchEvent(MotionEvent ev) {
+        boolean handled = super.onTouchEvent(ev);
+        if (mStylusEventHelper.checkAndPerformStylusEvent(ev)) {
+            return true;
+        }
+        return handled;
+    }
+
     /**
      * Helper method to get the string info of the tag.
      */
diff --git a/src/com/android/launcher3/widget/WidgetHostViewLoader.java b/src/com/android/launcher3/widget/WidgetHostViewLoader.java
index d654550..8875879 100644
--- a/src/com/android/launcher3/widget/WidgetHostViewLoader.java
+++ b/src/com/android/launcher3/widget/WidgetHostViewLoader.java
@@ -15,6 +15,7 @@
 import com.android.launcher3.Launcher;
 import com.android.launcher3.LauncherAppWidgetProviderInfo;
 import com.android.launcher3.compat.AppWidgetManagerCompat;
+import com.android.launcher3.util.Thunk;
 
 public class WidgetHostViewLoader {
 
@@ -38,7 +39,7 @@
     PendingAddWidgetInfo mCreateWidgetInfo = null;
 
     // TODO: technically, this class should not have to know the existence of the launcher.
-    private Launcher mLauncher;
+    @Thunk Launcher mLauncher;
     private Handler mHandler;
 
     public WidgetHostViewLoader(Launcher launcher) {
@@ -188,7 +189,7 @@
         return options;
     }
 
-    private void setState(int state) {
+    @Thunk void setState(int state) {
         if (DEBUG) {
             Log.d(TAG, String.format("     state [%d -> %d]", mState, state));
         }
diff --git a/src/com/android/launcher3/widget/WidgetsContainerView.java b/src/com/android/launcher3/widget/WidgetsContainerView.java
index 11c2107..1184394 100644
--- a/src/com/android/launcher3/widget/WidgetsContainerView.java
+++ b/src/com/android/launcher3/widget/WidgetsContainerView.java
@@ -20,8 +20,8 @@
 import android.graphics.Bitmap;
 import android.graphics.Rect;
 import android.graphics.drawable.Drawable;
+import android.graphics.drawable.InsetDrawable;
 import android.support.v7.widget.LinearLayoutManager;
-import android.support.v7.widget.RecyclerView;
 import android.support.v7.widget.RecyclerView.State;
 import android.util.AttributeSet;
 import android.util.Log;
@@ -46,6 +46,7 @@
 import com.android.launcher3.WidgetPreviewLoader;
 import com.android.launcher3.Workspace;
 import com.android.launcher3.model.WidgetsModel;
+import com.android.launcher3.util.Thunk;
 
 /**
  * The widgets list view container.
@@ -60,7 +61,7 @@
     private static final int PRELOAD_SCREEN_HEIGHT_MULTIPLE = 1;
 
     /* Global instances that are used inside this container. */
-    private Launcher mLauncher;
+    @Thunk Launcher mLauncher;
     private DragController mDragController;
     private IconCache mIconCache;
 
@@ -92,7 +93,6 @@
         mWidgetHostViewLoader = new WidgetHostViewLoader(mLauncher);
         mAdapter = new WidgetsListAdapter(context, this, this, mLauncher);
         mIconCache = (LauncherAppState.getInstance()).getIconCache();
-
         if (DEBUG) {
             Log.d(TAG, "WidgetsContainerView constructor");
         }
@@ -240,6 +240,7 @@
             Drawable icon = mIconCache.getFullResIcon(createShortcutInfo.activityInfo);
             preview = Utilities.createIconBitmap(icon, mLauncher);
             createItemInfo.spanX = createItemInfo.spanY = 1;
+            scale = ((float) mLauncher.getDeviceProfile().iconSizePx) / preview.getWidth();
         }
 
         // Don't clip alpha values for the drag outline if we're using the default widget preview
@@ -345,6 +346,23 @@
             setPadding(mFixedBounds.left, mFixedBounds.top, getMeasuredWidth() - mFixedBounds.right,
                     mFixedBounds.bottom);
         }
+
+        int inset = mFixedBounds.isEmpty() ? mView.getScrollbarWidth() : mFixedBoundsContainerInset;
+        mView.setPadding(inset + mView.getScrollbarWidth(), inset,
+                inset, inset);
+    }
+
+    @Override
+    protected void onUpdateBackgrounds() {
+        InsetDrawable background;
+        // Update the background of the reveal view and list to be inset with the fixed bound
+        // insets instead of the default insets
+        // TODO: Use quantum_panel instead of quantum_panel_shape.
+        int inset = mFixedBounds.isEmpty() ? mView.getScrollbarWidth() : mFixedBoundsContainerInset;
+        background = new InsetDrawable(
+                getContext().getResources().getDrawable(R.drawable.quantum_panel_shape),
+                inset, 0, inset, 0);
+        mView.updateBackgroundPadding(background);
     }
 
     /**
diff --git a/src/com/android/launcher3/widget/WidgetsRecyclerView.java b/src/com/android/launcher3/widget/WidgetsRecyclerView.java
index bef2559..4aa3323 100644
--- a/src/com/android/launcher3/widget/WidgetsRecyclerView.java
+++ b/src/com/android/launcher3/widget/WidgetsRecyclerView.java
@@ -19,20 +19,25 @@
 import android.content.Context;
 import android.graphics.Rect;
 import android.graphics.drawable.Drawable;
-import android.support.v7.widget.RecyclerView;
+import android.support.v7.widget.LinearLayoutManager;
 import android.util.AttributeSet;
-import android.view.MotionEvent;
+import android.view.View;
 
 import com.android.launcher3.BaseRecyclerView;
+import com.android.launcher3.Utilities;
+import com.android.launcher3.compat.AlphabeticIndexCompat;
 import com.android.launcher3.model.WidgetsModel;
+import com.android.launcher3.model.PackageItemInfo;
 
 /**
  * The widgets recycler view.
  */
 public class WidgetsRecyclerView extends BaseRecyclerView {
 
+    private static final String TAG = "WidgetsRecyclerView";
     private WidgetsModel mWidgets;
     private Rect mBackgroundPadding = new Rect();
+    private PackageItemInfo mLastPackageItemInfo;
 
     public WidgetsRecyclerView(Context context) {
         this(context, null);
@@ -68,8 +73,17 @@
      */
     @Override
     public String scrollToPositionAtProgress(float touchFraction) {
-        // Ensure that we have any sections
-        return "";
+        float pos = mWidgets.getPackageSize() * touchFraction;
+
+        int posInt = (int) pos;
+        LinearLayoutManager layoutManager = ((LinearLayoutManager) getLayoutManager());
+        getCurScrollState(scrollPosState);
+        layoutManager.scrollToPositionWithOffset((int) pos,
+                (int) (scrollPosState.rowHeight * ((float) posInt - pos)));
+
+        posInt = (int) ((touchFraction == 1)? pos -1 : pos);
+        PackageItemInfo p = mWidgets.getPackageItemInfo(posInt);
+        return p.titleSectionName;
     }
 
     /**
@@ -78,19 +92,41 @@
     @Override
     public void updateVerticalScrollbarBounds() {
         int rowCount = mWidgets.getPackageSize();
+        verticalScrollbarBounds.setEmpty();
 
-        // Skip early if there are no items.
+        // Skip early if, there are no items.
         if (rowCount == 0) {
+            return;
+        }
+
+        // Skip early if, there no child laid out in the container.
+        getCurScrollState(scrollPosState);
+        if (scrollPosState.rowIndex < 0) {
+            return;
+        }
+
+        int actualHeight = getHeight() - getPaddingTop() - getPaddingBottom();
+        int totalScrollHeight = rowCount * scrollPosState.rowHeight;
+        // Skip early if the height of all the rows are actually less than the container height.
+        if (totalScrollHeight < actualHeight) {
             verticalScrollbarBounds.setEmpty();
             return;
         }
 
-        int x, y;
-        getCurScrollState(scrollPosState);
-        if (scrollPosState.rowIndex < 0) {
-            verticalScrollbarBounds.setEmpty();
+        int scrollbarHeight = (int) (actualHeight / ((float) totalScrollHeight / actualHeight));
+        int availableY = totalScrollHeight - actualHeight;
+        int availableScrollY = actualHeight - scrollbarHeight;
+        int y = (scrollPosState.rowIndex * scrollPosState.rowHeight)
+                - scrollPosState.rowTopOffset;
+        y = getPaddingTop() +
+                (int) (((float) (getPaddingTop() + y) / availableY) * availableScrollY);
+
+        // Calculate the position and size of the scroll bar.
+        int x = getWidth() - getScrollbarWidth() - mBackgroundPadding.right;
+        if (Utilities.isRtl(getResources())) {
+            x = mBackgroundPadding.left;
         }
-        // TODO
+        verticalScrollbarBounds.set(x, y, x + getScrollbarWidth(), y + scrollbarHeight);
     }
 
     /**
@@ -107,6 +143,11 @@
         if (rowCount == 0) {
             return;
         }
-        // TODO
+        View child = getChildAt(0);
+        int position = getChildPosition(child);
+
+        stateOut.rowIndex = position;
+        stateOut.rowTopOffset = getLayoutManager().getDecoratedTop(child);
+        stateOut.rowHeight = child.getHeight();
     }
 }
\ No newline at end of file