diff --git a/proguard.flags b/proguard.flags
index a8e2b60..5f393fc 100644
--- a/proguard.flags
+++ b/proguard.flags
@@ -3,10 +3,10 @@
 }
 
 -keep class com.android.launcher3.BaseRecyclerViewFastScrollBar {
-  public void setWidth(int);
-  public int getWidth();
-  public void setTrackAlpha(int);
-  public int getTrackAlpha();
+  public void setThumbWidth(int);
+  public int getThumbWidth();
+  public void setTrackWidth(int);
+  public int getTrackWidth();
 }
 
 -keep class com.android.launcher3.BaseRecyclerViewFastScrollPopup {
@@ -39,7 +39,7 @@
   public int getY();
 }
 
--keep class com.android.launcher3.DragLayer$LayoutParams {
+-keep class com.android.launcher3.dragndrop.DragLayer$LayoutParams {
   public void setWidth(int);
   public int getWidth();
   public void setHeight(int);
diff --git a/res/layout-land/launcher.xml b/res/layout-land/launcher.xml
index 6500ebc..f431fb1 100644
--- a/res/layout-land/launcher.xml
+++ b/res/layout-land/launcher.xml
@@ -23,7 +23,7 @@
     android:layout_height="match_parent"
     android:fitsSystemWindows="true">
 
-    <com.android.launcher3.DragLayer
+    <com.android.launcher3.dragndrop.DragLayer
         android:id="@+id/drag_layer"
         android:layout_width="match_parent"
         android:layout_height="match_parent">
@@ -68,7 +68,7 @@
             android:layout_width="match_parent"
             android:layout_height="match_parent"
             android:visibility="invisible" />
-    </com.android.launcher3.DragLayer>
+    </com.android.launcher3.dragndrop.DragLayer>
 
     <ViewStub
         android:id="@+id/launcher_overlay_stub"
diff --git a/res/layout-port/launcher.xml b/res/layout-port/launcher.xml
index d0772ee..a7f851e 100644
--- a/res/layout-port/launcher.xml
+++ b/res/layout-port/launcher.xml
@@ -24,7 +24,7 @@
     android:layout_height="match_parent"
     android:fitsSystemWindows="true">
 
-    <com.android.launcher3.DragLayer
+    <com.android.launcher3.dragndrop.DragLayer
         android:id="@+id/drag_layer"
         android:layout_width="match_parent"
         android:layout_height="match_parent">
@@ -78,7 +78,7 @@
             android:layout_width="match_parent"
             android:layout_height="match_parent"
             android:visibility="invisible" />
-    </com.android.launcher3.DragLayer>
+    </com.android.launcher3.dragndrop.DragLayer>
 
     <ViewStub
         android:id="@+id/launcher_overlay_stub"
diff --git a/res/layout-sw720dp/launcher.xml b/res/layout-sw720dp/launcher.xml
index 802922e..319a493 100644
--- a/res/layout-sw720dp/launcher.xml
+++ b/res/layout-sw720dp/launcher.xml
@@ -23,7 +23,7 @@
     android:layout_height="match_parent"
     android:fitsSystemWindows="true">
 
-    <com.android.launcher3.DragLayer
+    <com.android.launcher3.dragndrop.DragLayer
         android:id="@+id/drag_layer"
         android:layout_width="match_parent"
         android:layout_height="match_parent">
@@ -76,7 +76,7 @@
             android:layout_width="match_parent"
             android:layout_height="match_parent"
             android:visibility="invisible" />
-    </com.android.launcher3.DragLayer>
+    </com.android.launcher3.dragndrop.DragLayer>
 
     <ViewStub
         android:id="@+id/launcher_overlay_stub"
diff --git a/res/values-sw600dp/config.xml b/res/values-sw600dp/config.xml
index a7345a7..eb9af97 100644
--- a/res/values-sw600dp/config.xml
+++ b/res/values-sw600dp/config.xml
@@ -1,7 +1,4 @@
 <resources>
     <bool name="is_tablet">true</bool>
     <bool name="allow_rotation">true</bool>
-
-<!-- DragController -->
-    <integer name="config_flingToDeleteMinVelocity">-1000</integer>
 </resources>
diff --git a/res/values-sw600dp/dimens.xml b/res/values-sw600dp/dimens.xml
index 2651fbb..c1ac9aa 100644
--- a/res/values-sw600dp/dimens.xml
+++ b/res/values-sw600dp/dimens.xml
@@ -28,4 +28,10 @@
     <dimen name="cling_migration_content_margin">64dp</dimen>
     <dimen name="cling_migration_content_width">280dp</dimen>
 
+<!-- Widget tray -->
+    <dimen name="widget_section_indent">56dp</dimen>
+
+
+<!-- DragController -->
+    <dimen name="drag_flingToDeleteMinVelocity">-1000dp</dimen>
 </resources>
diff --git a/res/values/colors.xml b/res/values/colors.xml
index 0add48c..6fe2ae1 100644
--- a/res/values/colors.xml
+++ b/res/values/colors.xml
@@ -39,7 +39,7 @@
     <color name="outline_color">#FFFFFFFF</color>
 
     <!-- Containers -->
-    <color name="container_fastscroll_thumb_inactive_color">#42000000</color>
+    <color name="container_fastscroll_thumb_inactive_color">#009688</color>
     <color name="container_fastscroll_thumb_active_color">#009688</color>
 
     <!-- All Apps -->
diff --git a/res/values/config.xml b/res/values/config.xml
index 0f18dff..6a67840 100644
--- a/res/values/config.xml
+++ b/res/values/config.xml
@@ -17,7 +17,6 @@
     <bool name="enable_backup">false</bool>
 
 <!-- DragController -->
-    <integer name="config_flingToDeleteMinVelocity">-1500</integer>
     <item type="id" name="drag_event_parity" />
 
 <!-- AllApps & Launcher transitions -->
diff --git a/res/values/dimens.xml b/res/values/dimens.xml
index b9fb6e2..5430872 100644
--- a/res/values/dimens.xml
+++ b/res/values/dimens.xml
@@ -55,9 +55,9 @@
     <!-- Notes: container_bounds_inset - quantum_panel_outer_padding -->
     <dimen name="container_bounds_minus_quantum_panel_padding_inset">4dp</dimen>
 
-    <dimen name="container_fastscroll_thumb_min_width">4dp</dimen>
-    <dimen name="container_fastscroll_thumb_max_width">8dp</dimen>
-    <dimen name="container_fastscroll_thumb_height">64dp</dimen>
+    <dimen name="container_fastscroll_thumb_min_width">5dp</dimen>
+    <dimen name="container_fastscroll_thumb_max_width">9dp</dimen>
+    <dimen name="container_fastscroll_thumb_height">72dp</dimen>
     <dimen name="container_fastscroll_thumb_touch_inset">-24dp</dimen>
     <dimen name="container_fastscroll_popup_size">72dp</dimen>
     <dimen name="container_fastscroll_popup_text_size">48dp</dimen>
@@ -85,6 +85,7 @@
     <dimen name="widget_section_icon_size">40dp</dimen>
     <dimen name="widget_section_vertical_padding">8dp</dimen>
     <dimen name="widget_section_horizontal_padding">16dp</dimen>
+    <dimen name="widget_section_indent">0dp</dimen>
 
     <dimen name="widget_row_padding">8dp</dimen>
     <dimen name="widget_row_divider">2dp</dimen>
@@ -111,6 +112,8 @@
          and drop targets like all-apps and folders -->
     <dimen name="drag_elevation">30dp</dimen>
 
+    <dimen name="drag_flingToDeleteMinVelocity">-1500dp</dimen>
+
 <!-- Theme -->
     <dimen name="quantum_panel_outer_padding">4dp</dimen>
 
diff --git a/src/com/android/launcher3/AnotherWindowDropTarget.java b/src/com/android/launcher3/AnotherWindowDropTarget.java
index aff36ae..eaac6be 100644
--- a/src/com/android/launcher3/AnotherWindowDropTarget.java
+++ b/src/com/android/launcher3/AnotherWindowDropTarget.java
@@ -27,7 +27,7 @@
 public class AnotherWindowDropTarget implements DropTarget {
     final Launcher mLauncher;
 
-    AnotherWindowDropTarget (Context context) { mLauncher = (Launcher) context; }
+    public AnotherWindowDropTarget (Context context) { mLauncher = (Launcher) context; }
 
     @Override
     public boolean isDropEnabled() { return true; }
diff --git a/src/com/android/launcher3/AppWidgetResizeFrame.java b/src/com/android/launcher3/AppWidgetResizeFrame.java
index c87074d..6818929 100644
--- a/src/com/android/launcher3/AppWidgetResizeFrame.java
+++ b/src/com/android/launcher3/AppWidgetResizeFrame.java
@@ -1,5 +1,7 @@
 package com.android.launcher3;
 
+import com.android.launcher3.dragndrop.DragLayer;
+
 import android.animation.AnimatorSet;
 import android.animation.ObjectAnimator;
 import android.animation.PropertyValuesHolder;
@@ -9,6 +11,7 @@
 import android.appwidget.AppWidgetProviderInfo;
 import android.content.Context;
 import android.content.res.Resources;
+import android.graphics.Point;
 import android.graphics.Rect;
 import android.view.Gravity;
 import android.widget.FrameLayout;
@@ -19,7 +22,10 @@
     private static final float DIMMED_HANDLE_ALPHA = 0f;
     private static final float RESIZE_THRESHOLD = 0.66f;
 
-    private static Rect sTmpRect = new Rect();
+    private static final Rect sTmpRect = new Rect();
+
+    // Represents the cell size on the grid in the two orientations.
+    private static Point[] sCellSize;
 
     private final Launcher mLauncher;
     private final LauncherAppWidgetHostView mWidgetView;
@@ -341,28 +347,27 @@
     }
 
     public static Rect getWidgetSizeRanges(Launcher launcher, int spanX, int spanY, Rect rect) {
+        if (sCellSize == null) {
+            InvariantDeviceProfile inv = LauncherAppState.getInstance().getInvariantDeviceProfile();
+
+            // Initiate cell sizes.
+            sCellSize = new Point[2];
+            sCellSize[0] = inv.landscapeProfile.getCellSize();
+            sCellSize[1] = inv.portraitProfile.getCellSize();
+        }
+
         if (rect == null) {
             rect = new Rect();
         }
-        Rect landMetrics = Workspace.getCellLayoutMetrics(launcher, CellLayout.LANDSCAPE);
-        Rect portMetrics = Workspace.getCellLayoutMetrics(launcher, CellLayout.PORTRAIT);
         final float density = launcher.getResources().getDisplayMetrics().density;
 
         // Compute landscape size
-        int cellWidth = landMetrics.left;
-        int cellHeight = landMetrics.top;
-        int widthGap = landMetrics.right;
-        int heightGap = landMetrics.bottom;
-        int landWidth = (int) ((spanX * cellWidth + (spanX - 1) * widthGap) / density);
-        int landHeight = (int) ((spanY * cellHeight + (spanY - 1) * heightGap) / density);
+        int landWidth = (int) ((spanX * sCellSize[0].x) / density);
+        int landHeight = (int) ((spanY * sCellSize[0].y) / density);
 
         // Compute portrait size
-        cellWidth = portMetrics.left;
-        cellHeight = portMetrics.top;
-        widthGap = portMetrics.right;
-        heightGap = portMetrics.bottom;
-        int portWidth = (int) ((spanX * cellWidth + (spanX - 1) * widthGap) / density);
-        int portHeight = (int) ((spanY * cellHeight + (spanY - 1) * heightGap) / density);
+        int portWidth = (int) ((spanX * sCellSize[1].x) / density);
+        int portHeight = (int) ((spanY * sCellSize[1].y) / density);
         rect.set(portWidth, landHeight, landWidth, portHeight);
         return rect;
     }
diff --git a/src/com/android/launcher3/BaseRecyclerView.java b/src/com/android/launcher3/BaseRecyclerView.java
index 0fae427..f0d8b3b 100644
--- a/src/com/android/launcher3/BaseRecyclerView.java
+++ b/src/com/android/launcher3/BaseRecyclerView.java
@@ -92,9 +92,15 @@
             // TODO(winsonc): If we want to animate the section heads while scrolling, we can
             //                initiate that here if the recycler view scroll state is not
             //                RecyclerView.SCROLL_STATE_IDLE.
+
+            onUpdateScrollbar(dy);
         }
     }
 
+    public void reset() {
+        mScrollbar.reattachThumbToScroll();
+    }
+
     @Override
     protected void onFinishInflate() {
         super.onFinishInflate();
@@ -143,7 +149,7 @@
                 mScrollbar.handleTouchEvent(ev, mDownX, mDownY, mLastY);
                 break;
         }
-        return mScrollbar.isDragging();
+        return mScrollbar.isDraggingThumb();
     }
 
     public void onRequestDisallowInterceptTouchEvent(boolean disallowIntercept) {
@@ -185,12 +191,10 @@
      *   AvailableScrollHeight = Total height of the all items - last page height
      *
      * This assumes that all rows are the same height.
-     *
-     * @param yOffset the offset from the top of the recycler view to start tracking.
      */
-    protected int getAvailableScrollHeight(int rowCount, int rowHeight, int yOffset) {
+    protected int getAvailableScrollHeight(int rowCount, int rowHeight) {
         int visibleHeight = getHeight() - mBackgroundPadding.top - mBackgroundPadding.bottom;
-        int scrollHeight = getPaddingTop() + yOffset + rowCount * rowHeight + getPaddingBottom();
+        int scrollHeight = getPaddingTop() + rowCount * rowHeight + getPaddingBottom();
         int availableScrollHeight = scrollHeight - visibleHeight;
         return availableScrollHeight;
     }
@@ -222,7 +226,7 @@
     @Override
     protected void dispatchDraw(Canvas canvas) {
         super.dispatchDraw(canvas);
-        onUpdateScrollbar();
+        onUpdateScrollbar(0);
         mScrollbar.draw(canvas);
     }
 
@@ -234,24 +238,21 @@
      * @param scrollPosState the current scroll position
      * @param rowCount the number of rows, used to calculate the total scroll height (assumes that
      *                 all rows are the same height)
-     * @param yOffset the offset to start tracking in the recycler view (only used for all apps)
      */
     protected void synchronizeScrollBarThumbOffsetToViewScroll(ScrollPositionState scrollPosState,
-            int rowCount, int yOffset) {
-        int availableScrollHeight = getAvailableScrollHeight(rowCount, scrollPosState.rowHeight,
-                yOffset);
-        int availableScrollBarHeight = getAvailableScrollBarHeight();
-
+            int rowCount) {
         // Only show the scrollbar if there is height to be scrolled
+        int availableScrollBarHeight = getAvailableScrollBarHeight();
+        int availableScrollHeight = getAvailableScrollHeight(rowCount, scrollPosState.rowHeight);
         if (availableScrollHeight <= 0) {
-            mScrollbar.setScrollbarThumbOffset(-1, -1);
+            mScrollbar.setThumbOffset(-1, -1);
             return;
         }
 
         // Calculate the current scroll position, the scrollY of the recycler view accounts for the
         // view padding, while the scrollBarY is drawn right up to the background padding (ignoring
         // padding)
-        int scrollY = getPaddingTop() + yOffset +
+        int scrollY = getPaddingTop() +
                 (scrollPosState.rowIndex * scrollPosState.rowHeight) - scrollPosState.rowTopOffset;
         int scrollBarY = mBackgroundPadding.top +
                 (int) (((float) scrollY / availableScrollHeight) * availableScrollBarHeight);
@@ -261,9 +262,9 @@
         if (Utilities.isRtl(getResources())) {
             scrollBarX = mBackgroundPadding.left;
         } else {
-            scrollBarX = getWidth() - mBackgroundPadding.right - mScrollbar.getWidth();
+            scrollBarX = getWidth() - mBackgroundPadding.right - mScrollbar.getThumbWidth();
         }
-        mScrollbar.setScrollbarThumbOffset(scrollBarX, scrollBarY);
+        mScrollbar.setThumbOffset(scrollBarX, scrollBarY);
     }
 
     /**
@@ -276,10 +277,15 @@
      * Updates the bounds for the scrollbar.
      * <p>Override in each subclass of this base class.
      */
-    public abstract void onUpdateScrollbar();
+    public abstract void onUpdateScrollbar(int dy);
 
     /**
      * <p>Override in each subclass of this base class.
      */
     public void onFastScrollCompleted() {}
+
+    /**
+     * Returns information about the item that the recycler view is currently scrolled to.
+     */
+    protected abstract void getCurScrollState(ScrollPositionState stateOut);
 }
\ No newline at end of file
diff --git a/src/com/android/launcher3/BaseRecyclerViewFastScrollBar.java b/src/com/android/launcher3/BaseRecyclerViewFastScrollBar.java
index 2c4184d..f76aed7 100644
--- a/src/com/android/launcher3/BaseRecyclerViewFastScrollBar.java
+++ b/src/com/android/launcher3/BaseRecyclerViewFastScrollBar.java
@@ -23,6 +23,7 @@
 import android.graphics.Canvas;
 import android.graphics.Color;
 import android.graphics.Paint;
+import android.graphics.Path;
 import android.graphics.Point;
 import android.graphics.Rect;
 import android.view.MotionEvent;
@@ -51,14 +52,20 @@
     private int mThumbActiveColor;
     @Thunk Point mThumbOffset = new Point(-1, -1);
     @Thunk Paint mThumbPaint;
-    private Paint mTrackPaint;
     private int mThumbMinWidth;
     private int mThumbMaxWidth;
     @Thunk int mThumbWidth;
     @Thunk int mThumbHeight;
+    private int mThumbCurvature;
+    private Path mThumbPath = new Path();
+    private Paint mTrackPaint;
+    private int mTrackWidth;
+    private float mLastTouchY;
     // The inset is the buffer around which a point will still register as a click on the scrollbar
     private int mTouchInset;
     private boolean mIsDragging;
+    private boolean mIsThumbDetached;
+    private boolean mCanThumbDetach;
 
     // This is the offset from the top of the scrollbar when the user first starts touching.  To
     // prevent jumping, this offset is applied as the user scrolls.
@@ -72,51 +79,74 @@
         mPopup = new BaseRecyclerViewFastScrollPopup(rv, res);
         mTrackPaint = new Paint();
         mTrackPaint.setColor(rv.getFastScrollerTrackColor(Color.BLACK));
-        mTrackPaint.setAlpha(0);
+        mTrackPaint.setAlpha(MAX_TRACK_ALPHA);
         mThumbInactiveColor = rv.getFastScrollerThumbInactiveColor(
                 res.getColor(R.color.container_fastscroll_thumb_inactive_color));
         mThumbActiveColor = res.getColor(R.color.container_fastscroll_thumb_active_color);
         mThumbPaint = new Paint();
+        mThumbPaint.setAntiAlias(true);
         mThumbPaint.setColor(mThumbInactiveColor);
+        mThumbPaint.setStyle(Paint.Style.FILL);
         mThumbWidth = mThumbMinWidth = res.getDimensionPixelSize(R.dimen.container_fastscroll_thumb_min_width);
         mThumbMaxWidth = res.getDimensionPixelSize(R.dimen.container_fastscroll_thumb_max_width);
         mThumbHeight = res.getDimensionPixelSize(R.dimen.container_fastscroll_thumb_height);
+        mThumbCurvature = mThumbMaxWidth - mThumbMinWidth;
         mTouchInset = res.getDimensionPixelSize(R.dimen.container_fastscroll_thumb_touch_inset);
     }
 
-    public void setScrollbarThumbOffset(int x, int y) {
+    public void setDetachThumbOnFastScroll() {
+        mCanThumbDetach = true;
+    }
+
+    public void reattachThumbToScroll() {
+        mIsThumbDetached = false;
+    }
+
+    public void setThumbOffset(int x, int y) {
         if (mThumbOffset.x == x && mThumbOffset.y == y) {
             return;
         }
-        mInvalidateRect.set(mThumbOffset.x, 0, mThumbOffset.x + mThumbWidth, mRv.getHeight());
+        mInvalidateRect.set(mThumbOffset.x - mThumbCurvature, mThumbOffset.y,
+                mThumbOffset.x + mThumbWidth, mThumbOffset.y + mThumbHeight);
         mThumbOffset.set(x, y);
-        mInvalidateRect.union(new Rect(mThumbOffset.x, 0, mThumbOffset.x + mThumbWidth,
-                mRv.getHeight()));
+        updateThumbPath();
+        mInvalidateRect.union(mThumbOffset.x - mThumbCurvature, mThumbOffset.y,
+                mThumbOffset.x + mThumbWidth, mThumbOffset.y + mThumbHeight);
         mRv.invalidate(mInvalidateRect);
     }
 
-    // Setter/getter for the search bar width for animations
-    public void setWidth(int width) {
-        mInvalidateRect.set(mThumbOffset.x, 0, mThumbOffset.x + mThumbWidth, mRv.getHeight());
+    public Point getThumbOffset() {
+        return mThumbOffset;
+    }
+
+    // Setter/getter for the thumb bar width for animations
+    public void setThumbWidth(int width) {
+        mInvalidateRect.set(mThumbOffset.x - mThumbCurvature, mThumbOffset.y,
+                mThumbOffset.x + mThumbWidth, mThumbOffset.y + mThumbHeight);
         mThumbWidth = width;
-        mInvalidateRect.union(new Rect(mThumbOffset.x, 0, mThumbOffset.x + mThumbWidth,
-                mRv.getHeight()));
+        updateThumbPath();
+        mInvalidateRect.union(mThumbOffset.x - mThumbCurvature, mThumbOffset.y,
+                mThumbOffset.x + mThumbWidth, mThumbOffset.y + mThumbHeight);
         mRv.invalidate(mInvalidateRect);
     }
 
-    public int getWidth() {
+    public int getThumbWidth() {
         return mThumbWidth;
     }
 
-    // Setter/getter for the track background alpha for animations
-    public void setTrackAlpha(int alpha) {
-        mTrackPaint.setAlpha(alpha);
-        mInvalidateRect.set(mThumbOffset.x, 0, mThumbOffset.x + mThumbWidth, mRv.getHeight());
+    // Setter/getter for the track bar width for animations
+    public void setTrackWidth(int width) {
+        mInvalidateRect.set(mThumbOffset.x - mThumbCurvature, 0, mThumbOffset.x + mThumbWidth,
+                mRv.getHeight());
+        mTrackWidth = width;
+        updateThumbPath();
+        mInvalidateRect.union(mThumbOffset.x - mThumbCurvature, 0, mThumbOffset.x + mThumbWidth,
+                mRv.getHeight());
         mRv.invalidate(mInvalidateRect);
     }
 
-    public int getTrackAlpha() {
-        return mTrackPaint.getAlpha();
+    public int getTrackWidth() {
+        return mTrackWidth;
     }
 
     public int getThumbHeight() {
@@ -127,10 +157,18 @@
         return mThumbMaxWidth;
     }
 
-    public boolean isDragging() {
+    public float getLastTouchY() {
+        return mLastTouchY;
+    }
+
+    public boolean isDraggingThumb() {
         return mIsDragging;
     }
 
+    public boolean isThumbDetached() {
+        return mIsThumbDetached;
+    }
+
     /**
      * Handles the touch event and determines whether to show the fast scroller (or updates it if
      * it is already showing).
@@ -152,6 +190,9 @@
                         Math.abs(y - downY) > config.getScaledTouchSlop()) {
                     mRv.getParent().requestDisallowInterceptTouchEvent(true);
                     mIsDragging = true;
+                    if (mCanThumbDetach) {
+                        mIsThumbDetached = true;
+                    }
                     mTouchOffset += (lastY - downY);
                     mPopup.animateVisibility(true);
                     animateScrollbar(true);
@@ -166,11 +207,13 @@
                     mPopup.setSectionName(sectionName);
                     mPopup.animateVisibility(!sectionName.isEmpty());
                     mRv.invalidate(mPopup.updateFastScrollerBounds(mRv, lastY));
+                    mLastTouchY = boundedY;
                 }
                 break;
             case MotionEvent.ACTION_UP:
             case MotionEvent.ACTION_CANCEL:
                 mTouchOffset = 0;
+                mLastTouchY = 0;
                 if (mIsDragging) {
                     mIsDragging = false;
                     mPopup.animateVisibility(false);
@@ -189,8 +232,7 @@
         if (mTrackPaint.getAlpha() > 0) {
             canvas.drawRect(mThumbOffset.x, 0, mThumbOffset.x + mThumbWidth, mRv.getHeight(), mTrackPaint);
         }
-        canvas.drawRect(mThumbOffset.x, mThumbOffset.y, mThumbOffset.x + mThumbWidth,
-                mThumbOffset.y + mThumbHeight, mThumbPaint);
+        canvas.drawPath(mThumbPath, mThumbPaint);
 
         // Draw the popup
         mPopup.draw(canvas);
@@ -203,27 +245,46 @@
         if (mScrollbarAnimator != null) {
             mScrollbarAnimator.cancel();
         }
-        ObjectAnimator trackAlphaAnim = ObjectAnimator.ofInt(this, "trackAlpha",
-                isScrolling ? MAX_TRACK_ALPHA : 0);
-        ObjectAnimator thumbWidthAnim = ObjectAnimator.ofInt(this, "width",
-                isScrolling ? mThumbMaxWidth : mThumbMinWidth);
-        ValueAnimator colorAnimation = ValueAnimator.ofObject(new ArgbEvaluator(),
-                mThumbPaint.getColor(), isScrolling ? mThumbActiveColor : mThumbInactiveColor);
-        colorAnimation.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {
-            @Override
-            public void onAnimationUpdate(ValueAnimator animator) {
-                mThumbPaint.setColor((Integer) animator.getAnimatedValue());
-                mRv.invalidate(mThumbOffset.x, mThumbOffset.y, mThumbOffset.x + mThumbWidth,
-                        mThumbOffset.y + mThumbHeight);
-            }
-        });
+
         mScrollbarAnimator = new AnimatorSet();
-        mScrollbarAnimator.playTogether(trackAlphaAnim, thumbWidthAnim, colorAnimation);
+        ObjectAnimator trackWidthAnim = ObjectAnimator.ofInt(this, "trackWidth",
+                isScrolling ? mThumbMaxWidth : mThumbMinWidth);
+        ObjectAnimator thumbWidthAnim = ObjectAnimator.ofInt(this, "thumbWidth",
+                isScrolling ? mThumbMaxWidth : mThumbMinWidth);
+        mScrollbarAnimator.playTogether(trackWidthAnim, thumbWidthAnim);
+        if (mThumbActiveColor != mThumbInactiveColor) {
+            ValueAnimator colorAnimation = ValueAnimator.ofObject(new ArgbEvaluator(),
+                    mThumbPaint.getColor(), isScrolling ? mThumbActiveColor : mThumbInactiveColor);
+            colorAnimation.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {
+                @Override
+                public void onAnimationUpdate(ValueAnimator animator) {
+                    mThumbPaint.setColor((Integer) animator.getAnimatedValue());
+                    mRv.invalidate(mThumbOffset.x, mThumbOffset.y, mThumbOffset.x + mThumbWidth,
+                            mThumbOffset.y + mThumbHeight);
+                }
+            });
+            mScrollbarAnimator.play(colorAnimation);
+        }
         mScrollbarAnimator.setDuration(SCROLL_BAR_VIS_DURATION);
         mScrollbarAnimator.start();
     }
 
     /**
+     * Updates the path for the thumb drawable.
+     */
+    private void updateThumbPath() {
+        mThumbCurvature = mThumbMaxWidth - mThumbWidth;
+        mThumbPath.reset();
+        mThumbPath.moveTo(mThumbOffset.x + mThumbWidth, mThumbOffset.y);                    // tr
+        mThumbPath.lineTo(mThumbOffset.x + mThumbWidth, mThumbOffset.y + mThumbHeight);     // br
+        mThumbPath.lineTo(mThumbOffset.x, mThumbOffset.y + mThumbHeight);                   // bl
+        mThumbPath.cubicTo(mThumbOffset.x, mThumbOffset.y + mThumbHeight,
+                mThumbOffset.x - mThumbCurvature, mThumbOffset.y + mThumbHeight / 2,
+                mThumbOffset.x, mThumbOffset.y);                                            // bl2tl
+        mThumbPath.close();
+    }
+
+    /**
      * Returns whether the specified points are near the scroll bar bounds.
      */
     private boolean isNearPoint(int x, int y) {
diff --git a/src/com/android/launcher3/ButtonDropTarget.java b/src/com/android/launcher3/ButtonDropTarget.java
index f97179c..dc29f7d 100644
--- a/src/com/android/launcher3/ButtonDropTarget.java
+++ b/src/com/android/launcher3/ButtonDropTarget.java
@@ -38,6 +38,9 @@
 import android.view.animation.LinearInterpolator;
 import android.widget.TextView;
 
+import com.android.launcher3.dragndrop.DragController;
+import com.android.launcher3.dragndrop.DragLayer;
+import com.android.launcher3.dragndrop.DragView;
 import com.android.launcher3.util.Thunk;
 
 /**
diff --git a/src/com/android/launcher3/CellLayout.java b/src/com/android/launcher3/CellLayout.java
index cd005e5..772bb7b 100644
--- a/src/com/android/launcher3/CellLayout.java
+++ b/src/com/android/launcher3/CellLayout.java
@@ -405,7 +405,7 @@
         mIsDragTarget = false;
     }
 
-    boolean isDragTarget() {
+    public boolean isDragTarget() {
         return mIsDragTarget;
     }
 
@@ -425,7 +425,7 @@
         }
     }
 
-    boolean getIsDragOverlapping() {
+    public boolean getIsDragOverlapping() {
         return mIsDragOverlapping;
     }
 
@@ -2802,10 +2802,10 @@
 
         // X coordinate of the view in the layout.
         @ViewDebug.ExportedProperty
-        int x;
+        public int x;
         // Y coordinate of the view in the layout.
         @ViewDebug.ExportedProperty
-        int y;
+        public int y;
 
         boolean dropped;
 
diff --git a/src/com/android/launcher3/DeleteDropTarget.java b/src/com/android/launcher3/DeleteDropTarget.java
index bf5bc17..32bf192 100644
--- a/src/com/android/launcher3/DeleteDropTarget.java
+++ b/src/com/android/launcher3/DeleteDropTarget.java
@@ -24,6 +24,7 @@
 import android.view.View;
 import android.view.animation.AnimationUtils;
 
+import com.android.launcher3.dragndrop.DragLayer;
 import com.android.launcher3.util.FlingAnimation;
 import com.android.launcher3.util.Thunk;
 
diff --git a/src/com/android/launcher3/DeviceProfile.java b/src/com/android/launcher3/DeviceProfile.java
index 9b4642d..6364d90 100644
--- a/src/com/android/launcher3/DeviceProfile.java
+++ b/src/com/android/launcher3/DeviceProfile.java
@@ -280,6 +280,18 @@
         return bounds;
     }
 
+    public Point getCellSize() {
+        Point result = new Point();
+        // Since we are only concerned with the overall padding, layout direction does
+        // not matter.
+        Rect padding = getWorkspacePadding(false /* isLayoutRtl */ );
+        result.x = calculateCellWidth(availableWidthPx - padding.left - padding.right,
+                inv.numColumns);
+        result.y = calculateCellHeight(availableHeightPx - padding.top - padding.bottom,
+                inv.numRows);
+        return result;
+    }
+
     /** Returns the workspace padding in the specified orientation */
     Rect getWorkspacePadding(boolean isLayoutRtl) {
         Rect searchBarBounds = getSearchBarBounds(isLayoutRtl);
diff --git a/src/com/android/launcher3/DropTarget.java b/src/com/android/launcher3/DropTarget.java
index 3748464..592cd32 100644
--- a/src/com/android/launcher3/DropTarget.java
+++ b/src/com/android/launcher3/DropTarget.java
@@ -16,6 +16,8 @@
 
 package com.android.launcher3;
 
+import com.android.launcher3.dragndrop.DragView;
+
 import android.graphics.PointF;
 import android.graphics.Rect;
 
diff --git a/src/com/android/launcher3/Folder.java b/src/com/android/launcher3/Folder.java
index 4af56ac..afb5fd8 100644
--- a/src/com/android/launcher3/Folder.java
+++ b/src/com/android/launcher3/Folder.java
@@ -52,11 +52,13 @@
 import android.widget.TextView;
 
 import com.android.launcher3.CellLayout.CellInfo;
-import com.android.launcher3.DragController.DragListener;
 import com.android.launcher3.FolderInfo.FolderListener;
 import com.android.launcher3.UninstallDropTarget.UninstallSource;
 import com.android.launcher3.Workspace.ItemOperator;
 import com.android.launcher3.accessibility.LauncherAccessibilityDelegate.AccessibilityDragSource;
+import com.android.launcher3.dragndrop.DragController;
+import com.android.launcher3.dragndrop.DragController.DragListener;
+import com.android.launcher3.dragndrop.DragLayer;
 import com.android.launcher3.util.Thunk;
 import com.android.launcher3.util.UiThreadCircularReveal;
 
diff --git a/src/com/android/launcher3/FolderIcon.java b/src/com/android/launcher3/FolderIcon.java
index de0df0d..a175d86 100644
--- a/src/com/android/launcher3/FolderIcon.java
+++ b/src/com/android/launcher3/FolderIcon.java
@@ -43,6 +43,8 @@
 
 import com.android.launcher3.DropTarget.DragObject;
 import com.android.launcher3.FolderInfo.FolderListener;
+import com.android.launcher3.dragndrop.DragLayer;
+import com.android.launcher3.dragndrop.DragView;
 import com.android.launcher3.util.Thunk;
 
 import java.util.ArrayList;
diff --git a/src/com/android/launcher3/FolderPagedView.java b/src/com/android/launcher3/FolderPagedView.java
index cc9c573..d8ef34e 100644
--- a/src/com/android/launcher3/FolderPagedView.java
+++ b/src/com/android/launcher3/FolderPagedView.java
@@ -30,6 +30,7 @@
 import com.android.launcher3.FocusHelper.PagedFolderKeyEventListener;
 import com.android.launcher3.PageIndicator.PageMarkerResources;
 import com.android.launcher3.Workspace.ItemOperator;
+import com.android.launcher3.dragndrop.DragController;
 import com.android.launcher3.util.Thunk;
 
 import java.util.ArrayList;
diff --git a/src/com/android/launcher3/ItemInfo.java b/src/com/android/launcher3/ItemInfo.java
index 956bb8c..6d5bbab 100644
--- a/src/com/android/launcher3/ItemInfo.java
+++ b/src/com/android/launcher3/ItemInfo.java
@@ -137,15 +137,8 @@
         return null;
     }
 
-    /**
-     * Write the fields of this item to the DB
-     * 
-     * @param context A context object to use for getting UserManagerCompat
-     * @param values
-     */
-
-    void onAddToDatabase(Context context, ContentValues values) {
-        values.put(LauncherSettings.BaseLauncherColumns.ITEM_TYPE, itemType);
+    public void writeToValues(ContentValues values) {
+        values.put(LauncherSettings.Favorites.ITEM_TYPE, itemType);
         values.put(LauncherSettings.Favorites.CONTAINER, container);
         values.put(LauncherSettings.Favorites.SCREEN, screenId);
         values.put(LauncherSettings.Favorites.CELLX, cellX);
@@ -153,6 +146,27 @@
         values.put(LauncherSettings.Favorites.SPANX, spanX);
         values.put(LauncherSettings.Favorites.SPANY, spanY);
         values.put(LauncherSettings.Favorites.RANK, rank);
+    }
+
+    public void readFromValues(ContentValues values) {
+        itemType = values.getAsInteger(LauncherSettings.Favorites.ITEM_TYPE);
+        container = values.getAsLong(LauncherSettings.Favorites.CONTAINER);
+        screenId = values.getAsLong(LauncherSettings.Favorites.SCREEN);
+        cellX = values.getAsInteger(LauncherSettings.Favorites.ITEM_TYPE);
+        cellY = values.getAsInteger(LauncherSettings.Favorites.ITEM_TYPE);
+        spanX = values.getAsInteger(LauncherSettings.Favorites.ITEM_TYPE);
+        spanY = values.getAsInteger(LauncherSettings.Favorites.ITEM_TYPE);
+        rank = values.getAsInteger(LauncherSettings.Favorites.ITEM_TYPE);
+    }
+
+    /**
+     * Write the fields of this item to the DB
+     *
+     * @param context A context object to use for getting UserManagerCompat
+     * @param values
+     */
+    void onAddToDatabase(Context context, ContentValues values) {
+        writeToValues(values);
         long serialNumber = UserManagerCompat.getInstance(context).getSerialNumberForUser(user);
         values.put(LauncherSettings.Favorites.PROFILE_ID, serialNumber);
 
diff --git a/src/com/android/launcher3/Launcher.java b/src/com/android/launcher3/Launcher.java
index 7ac034d..d926cc1 100644
--- a/src/com/android/launcher3/Launcher.java
+++ b/src/com/android/launcher3/Launcher.java
@@ -35,6 +35,7 @@
 import android.content.BroadcastReceiver;
 import android.content.ComponentCallbacks2;
 import android.content.ComponentName;
+import android.content.ContentValues;
 import android.content.Context;
 import android.content.DialogInterface;
 import android.content.Intent;
@@ -73,7 +74,6 @@
 import android.view.Gravity;
 import android.view.HapticFeedbackConstants;
 import android.view.KeyEvent;
-import android.view.LayoutInflater;
 import android.view.Menu;
 import android.view.MotionEvent;
 import android.view.Surface;
@@ -103,6 +103,9 @@
 import com.android.launcher3.compat.UserHandleCompat;
 import com.android.launcher3.compat.UserManagerCompat;
 import com.android.launcher3.config.ProviderConfig;
+import com.android.launcher3.dragndrop.DragController;
+import com.android.launcher3.dragndrop.DragLayer;
+import com.android.launcher3.dragndrop.DragView;
 import com.android.launcher3.model.WidgetsModel;
 import com.android.launcher3.util.ComponentKey;
 import com.android.launcher3.util.LongArrayMap;
@@ -131,7 +134,7 @@
 public class Launcher extends Activity
         implements View.OnClickListener, OnLongClickListener, LauncherModel.Callbacks,
                    View.OnTouchListener, PageSwitchListener, LauncherProviderChangeListener {
-    static final String TAG = "Launcher";
+    public static final String TAG = "Launcher";
     static final boolean LOGD = false;
 
     static final boolean PROFILE_STARTUP = false;
@@ -174,18 +177,8 @@
     private static final String RUNTIME_STATE_CURRENT_SCREEN = "launcher.current_screen";
     // Type: int
     private static final String RUNTIME_STATE = "launcher.state";
-    // Type: int
-    private static final String RUNTIME_STATE_PENDING_ADD_CONTAINER = "launcher.add_container";
-    // Type: int
-    private static final String RUNTIME_STATE_PENDING_ADD_SCREEN = "launcher.add_screen";
-    // Type: int
-    private static final String RUNTIME_STATE_PENDING_ADD_CELL_X = "launcher.add_cell_x";
-    // Type: int
-    private static final String RUNTIME_STATE_PENDING_ADD_CELL_Y = "launcher.add_cell_y";
-    // Type: int
-    private static final String RUNTIME_STATE_PENDING_ADD_SPAN_X = "launcher.add_span_x";
-    // Type: int
-    private static final String RUNTIME_STATE_PENDING_ADD_SPAN_Y = "launcher.add_span_y";
+    // Type: Content Values / parcelable
+    private static final String RUNTIME_STATE_PENDING_ADD_ITEM = "launcher.add_item";
     // Type: parcelable
     private static final String RUNTIME_STATE_PENDING_ADD_WIDGET_INFO = "launcher.add_widget_info";
     // Type: parcelable
@@ -236,8 +229,6 @@
     private final BroadcastReceiver mCloseSystemDialogsReceiver
             = new CloseSystemDialogsIntentReceiver();
 
-    private LayoutInflater mInflater;
-
     @Thunk Workspace mWorkspace;
     private View mLauncherView;
     private View mPageIndicators;
@@ -269,7 +260,6 @@
     @Thunk WidgetsContainerView mWidgetsView;
     @Thunk WidgetsModel mWidgetsModel;
 
-    private boolean mAutoAdvanceRunning = false;
     private AppWidgetHostView mQsb;
 
     private Bundle mSavedState;
@@ -303,16 +293,17 @@
 
     // Related to the auto-advancing of widgets
     private final int ADVANCE_MSG = 1;
-    private final int mAdvanceInterval = 20000;
-    private final int mAdvanceStagger = 250;
+    private static final int ADVANCE_INTERVAL = 20000;
+    private static final int ADVANCE_STAGGER = 250;
+
+    private boolean mAutoAdvanceRunning = false;
     private long mAutoAdvanceSentTime;
     private long mAutoAdvanceTimeLeft = -1;
-    @Thunk HashMap<View, AppWidgetProviderInfo> mWidgetsToAdvance =
-        new HashMap<View, AppWidgetProviderInfo>();
+    @Thunk HashMap<View, AppWidgetProviderInfo> mWidgetsToAdvance = new HashMap<>();
 
     // Determines how long to wait after a rotation before restoring the screen orientation to
     // match the sensor state.
-    private final int mRestoreScreenOrientationDelay = 500;
+    private static final int RESTORE_SCREEN_ORIENTATION_DELAY = 500;
 
     @Thunk Drawable mWorkspaceBackgroundDrawable;
 
@@ -432,7 +423,6 @@
         mIconCache = app.getIconCache();
 
         mDragController = new DragController(this);
-        mInflater = getLayoutInflater();
         mStateTransitionAnimation = new LauncherStateTransitionAnimation(this);
 
         mStats = new Stats(this);
@@ -637,10 +627,6 @@
         return mStats;
     }
 
-    public LayoutInflater getInflater() {
-        return mInflater;
-    }
-
     public boolean isDraggingEnabled() {
         // We prevent dragging when we are loading the workspace as it is possible to pick up a view
         // that is subsequently removed from the workspace in startBinding().
@@ -1304,16 +1290,9 @@
             mWorkspace.setRestorePage(currentScreen);
         }
 
-        final long pendingAddContainer = savedState.getLong(RUNTIME_STATE_PENDING_ADD_CONTAINER, -1);
-        final long pendingAddScreen = savedState.getLong(RUNTIME_STATE_PENDING_ADD_SCREEN, -1);
-
-        if (pendingAddContainer != ItemInfo.NO_ID && pendingAddScreen > -1) {
-            mPendingAddInfo.container = pendingAddContainer;
-            mPendingAddInfo.screenId = pendingAddScreen;
-            mPendingAddInfo.cellX = savedState.getInt(RUNTIME_STATE_PENDING_ADD_CELL_X);
-            mPendingAddInfo.cellY = savedState.getInt(RUNTIME_STATE_PENDING_ADD_CELL_Y);
-            mPendingAddInfo.spanX = savedState.getInt(RUNTIME_STATE_PENDING_ADD_SPAN_X);
-            mPendingAddInfo.spanY = savedState.getInt(RUNTIME_STATE_PENDING_ADD_SPAN_Y);
+        ContentValues itemValues = savedState.getParcelable(RUNTIME_STATE_PENDING_ADD_ITEM);
+        if (itemValues != null) {
+            mPendingAddInfo.readFromValues(itemValues);
             AppWidgetProviderInfo info = savedState.getParcelable(
                     RUNTIME_STATE_PENDING_ADD_WIDGET_INFO);
             mPendingAddWidgetInfo = info == null ?
@@ -1472,7 +1451,7 @@
      * @return A View inflated from layoutResId.
      */
     public View createShortcut(ViewGroup parent, ShortcutInfo info) {
-        BubbleTextView favorite = (BubbleTextView) mInflater.inflate(R.layout.app_icon,
+        BubbleTextView favorite = (BubbleTextView) getLayoutInflater().inflate(R.layout.app_icon,
                 parent, false);
         favorite.applyFromShortcutInfo(info, mIconCache);
         favorite.setCompoundDrawablePadding(mDeviceProfile.iconDrawablePaddingPx);
@@ -1718,11 +1697,11 @@
         if (autoAdvanceRunning != mAutoAdvanceRunning) {
             mAutoAdvanceRunning = autoAdvanceRunning;
             if (autoAdvanceRunning) {
-                long delay = mAutoAdvanceTimeLeft == -1 ? mAdvanceInterval : mAutoAdvanceTimeLeft;
+                long delay = mAutoAdvanceTimeLeft == -1 ? ADVANCE_INTERVAL : mAutoAdvanceTimeLeft;
                 sendAdvanceMessage(delay);
             } else {
                 if (!mWidgetsToAdvance.isEmpty()) {
-                    mAutoAdvanceTimeLeft = Math.max(0, mAdvanceInterval -
+                    mAutoAdvanceTimeLeft = Math.max(0, ADVANCE_INTERVAL -
                             (System.currentTimeMillis() - mAutoAdvanceSentTime));
                 }
                 mHandler.removeMessages(ADVANCE_MSG);
@@ -1739,7 +1718,7 @@
                 int i = 0;
                 for (View key: mWidgetsToAdvance.keySet()) {
                     final View v = key.findViewById(mWidgetsToAdvance.get(key).autoAdvanceViewId);
-                    final int delay = mAdvanceStagger * i;
+                    final int delay = ADVANCE_STAGGER * i;
                     if (v instanceof Advanceable) {
                         mHandler.postDelayed(new Runnable() {
                            public void run() {
@@ -1749,7 +1728,7 @@
                     }
                     i++;
                 }
-                sendAdvanceMessage(mAdvanceInterval);
+                sendAdvanceMessage(ADVANCE_INTERVAL);
             }
             return true;
         }
@@ -1940,12 +1919,9 @@
 
         if (mPendingAddInfo.container != ItemInfo.NO_ID && mPendingAddInfo.screenId > -1 &&
                 mWaitingForResult) {
-            outState.putLong(RUNTIME_STATE_PENDING_ADD_CONTAINER, mPendingAddInfo.container);
-            outState.putLong(RUNTIME_STATE_PENDING_ADD_SCREEN, mPendingAddInfo.screenId);
-            outState.putInt(RUNTIME_STATE_PENDING_ADD_CELL_X, mPendingAddInfo.cellX);
-            outState.putInt(RUNTIME_STATE_PENDING_ADD_CELL_Y, mPendingAddInfo.cellY);
-            outState.putInt(RUNTIME_STATE_PENDING_ADD_SPAN_X, mPendingAddInfo.spanX);
-            outState.putInt(RUNTIME_STATE_PENDING_ADD_SPAN_Y, mPendingAddInfo.spanY);
+            ContentValues itemValues = new ContentValues();
+            mPendingAddInfo.writeToValues(itemValues);
+            outState.putParcelable(RUNTIME_STATE_PENDING_ADD_ITEM, itemValues);
             outState.putParcelable(RUNTIME_STATE_PENDING_ADD_WIDGET_INFO, mPendingAddWidgetInfo);
             outState.putInt(RUNTIME_STATE_PENDING_ADD_WIDGET_ID, mPendingAddWidgetId);
         }
@@ -4306,7 +4282,7 @@
                     public void run() {
                         setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_UNSPECIFIED);
                     }
-                }, mRestoreScreenOrientationDelay);
+                }, RESTORE_SCREEN_ORIENTATION_DELAY);
             }
         }
     }
diff --git a/src/com/android/launcher3/LauncherAppWidgetHostView.java b/src/com/android/launcher3/LauncherAppWidgetHostView.java
index cf461a5..d8cb682 100644
--- a/src/com/android/launcher3/LauncherAppWidgetHostView.java
+++ b/src/com/android/launcher3/LauncherAppWidgetHostView.java
@@ -26,7 +26,8 @@
 import android.view.ViewGroup;
 import android.widget.RemoteViews;
 
-import com.android.launcher3.DragLayer.TouchCompleteListener;
+import com.android.launcher3.dragndrop.DragLayer;
+import com.android.launcher3.dragndrop.DragLayer.TouchCompleteListener;
 
 /**
  * {@inheritDoc}
diff --git a/src/com/android/launcher3/LauncherStateTransitionAnimation.java b/src/com/android/launcher3/LauncherStateTransitionAnimation.java
index 3d1efc6..0e20fab 100644
--- a/src/com/android/launcher3/LauncherStateTransitionAnimation.java
+++ b/src/com/android/launcher3/LauncherStateTransitionAnimation.java
@@ -23,7 +23,9 @@
 import android.animation.PropertyValuesHolder;
 import android.animation.TimeInterpolator;
 import android.annotation.SuppressLint;
+import android.annotation.TargetApi;
 import android.content.res.Resources;
+import android.os.Build;
 import android.util.Log;
 import android.view.View;
 import android.view.animation.AccelerateInterpolator;
@@ -361,7 +363,7 @@
                         if (layerViews.get(v) == BUILD_AND_SET_LAYER) {
                             v.setLayerType(View.LAYER_TYPE_HARDWARE, null);
                         }
-                        if (Utilities.ATLEAST_LOLLIPOP && Utilities.isViewAttachedToWindow(v)) {
+                        if (Utilities.ATLEAST_LOLLIPOP && v.isAttachedToWindow()) {
                             v.buildLayer();
                         }
                     }
@@ -656,6 +658,7 @@
 
             final AnimatorSet stateAnimation = animation;
             final Runnable startAnimRunnable = new Runnable() {
+                @TargetApi(Build.VERSION_CODES.LOLLIPOP)
                 public void run() {
                     // Check that mCurrentAnimation hasn't changed while
                     // we waited for a layout/draw pass
@@ -670,7 +673,7 @@
                         if (layerViews.get(v) == BUILD_AND_SET_LAYER) {
                             v.setLayerType(View.LAYER_TYPE_HARDWARE, null);
                         }
-                        if (Utilities.ATLEAST_LOLLIPOP && Utilities.isViewAttachedToWindow(v)) {
+                        if (Utilities.ATLEAST_LOLLIPOP && v.isAttachedToWindow()) {
                             v.buildLayer();
                         }
                     }
diff --git a/src/com/android/launcher3/PagedView.java b/src/com/android/launcher3/PagedView.java
index 3702cda..28e3367 100644
--- a/src/com/android/launcher3/PagedView.java
+++ b/src/com/android/launcher3/PagedView.java
@@ -63,7 +63,7 @@
     // the min drag distance for a fling to register, to prevent random page shifts
     private static final int MIN_LENGTH_FOR_FLING = 25;
 
-    protected static final int PAGE_SNAP_ANIMATION_DURATION = 750;
+    public static final int PAGE_SNAP_ANIMATION_DURATION = 750;
     protected static final int SLOW_PAGE_SNAP_ANIMATION_DURATION = 950;
 
     private static final float RETURN_TO_ORIGINAL_PAGE_THRESHOLD = 0.33f;
@@ -381,7 +381,7 @@
     /**
      * Returns the index of page to be shown immediately afterwards.
      */
-    int getNextPage() {
+    public int getNextPage() {
         return (mNextPage != INVALID_PAGE) ? mNextPage : mCurrentPage;
     }
 
diff --git a/src/com/android/launcher3/SearchDropTargetBar.java b/src/com/android/launcher3/SearchDropTargetBar.java
index f54d9d8..fdcad82 100644
--- a/src/com/android/launcher3/SearchDropTargetBar.java
+++ b/src/com/android/launcher3/SearchDropTargetBar.java
@@ -26,6 +26,7 @@
 import android.view.animation.AccelerateInterpolator;
 import android.widget.FrameLayout;
 
+import com.android.launcher3.dragndrop.DragController;
 import com.android.launcher3.util.Thunk;
 
 /*
@@ -186,7 +187,12 @@
      */
     private void animateViewAlpha(LauncherViewPropertyAnimator animator, View v, float alpha,
             int duration) {
-        if (v != null && Float.compare(v.getAlpha(), alpha) != 0) {
+        if (v == null) {
+            return;
+        }
+
+        animator.cancel();
+        if (Float.compare(v.getAlpha(), alpha) != 0) {
             if (duration > 0) {
                 animator.alpha(alpha).withLayer().setDuration(duration).start();
             } else {
diff --git a/src/com/android/launcher3/ShortcutInfo.java b/src/com/android/launcher3/ShortcutInfo.java
index f2c46de..a86a2f9 100644
--- a/src/com/android/launcher3/ShortcutInfo.java
+++ b/src/com/android/launcher3/ShortcutInfo.java
@@ -70,7 +70,7 @@
     /**
      * The intent used to start the application.
      */
-    Intent intent;
+    public Intent intent;
 
     /**
      * Indicates whether the icon comes from an application's resource (if false)
diff --git a/src/com/android/launcher3/Utilities.java b/src/com/android/launcher3/Utilities.java
index e0a4a1c..2340f95 100644
--- a/src/com/android/launcher3/Utilities.java
+++ b/src/com/android/launcher3/Utilities.java
@@ -529,16 +529,6 @@
         return null;
     }
 
-    @TargetApi(Build.VERSION_CODES.KITKAT)
-    public static boolean isViewAttachedToWindow(View v) {
-        if (ATLEAST_KITKAT) {
-            return v.isAttachedToWindow();
-        } else {
-            // A proxy call which returns null, if the view is not attached to the window.
-            return v.getKeyDispatcherState() != null;
-        }
-    }
-
     /**
      * Returns a widget with category {@link AppWidgetProviderInfo#WIDGET_CATEGORY_SEARCHBOX}
      * provided by the same package which is set to be global search activity.
diff --git a/src/com/android/launcher3/Workspace.java b/src/com/android/launcher3/Workspace.java
index 281c253..964a83d 100644
--- a/src/com/android/launcher3/Workspace.java
+++ b/src/com/android/launcher3/Workspace.java
@@ -48,7 +48,6 @@
 import android.util.Log;
 import android.util.SparseArray;
 import android.view.Choreographer;
-import android.view.Display;
 import android.view.MotionEvent;
 import android.view.View;
 import android.view.ViewGroup;
@@ -67,6 +66,11 @@
 import com.android.launcher3.accessibility.OverviewScreenAccessibilityDelegate;
 import com.android.launcher3.compat.UserHandleCompat;
 import com.android.launcher3.config.ProviderConfig;
+import com.android.launcher3.dragndrop.DragController;
+import com.android.launcher3.dragndrop.DragLayer;
+import com.android.launcher3.dragndrop.DragScroller;
+import com.android.launcher3.dragndrop.DragView;
+import com.android.launcher3.dragndrop.SpringLoadedDragController;
 import com.android.launcher3.util.LongArrayMap;
 import com.android.launcher3.util.Thunk;
 import com.android.launcher3.util.WallpaperUtils;
@@ -135,9 +139,6 @@
     private int mDragOverX = -1;
     private int mDragOverY = -1;
 
-    private static Rect mLandscapeCellLayoutMetrics = null;
-    private static Rect mPortraitCellLayoutMetrics = null;
-
     CustomContentCallbacks mCustomContentCallbacks;
     boolean mCustomContentShowing;
     private float mLastCustomContentScrollProgress = -1f;
@@ -2846,45 +2847,6 @@
         }
     }
 
-    /** Return a rect that has the cellWidth/cellHeight (left, top), and
-     * widthGap/heightGap (right, bottom) */
-    static Rect getCellLayoutMetrics(Launcher launcher, int orientation) {
-        LauncherAppState app = LauncherAppState.getInstance();
-        InvariantDeviceProfile inv = app.getInvariantDeviceProfile();
-
-        Display display = launcher.getWindowManager().getDefaultDisplay();
-        Point smallestSize = new Point();
-        Point largestSize = new Point();
-        display.getCurrentSizeRange(smallestSize, largestSize);
-        int countX = (int) inv.numColumns;
-        int countY = (int) inv.numRows;
-        boolean isLayoutRtl = Utilities.isRtl(launcher.getResources());
-        if (orientation == CellLayout.LANDSCAPE) {
-            if (mLandscapeCellLayoutMetrics == null) {
-                Rect padding = inv.landscapeProfile.getWorkspacePadding(isLayoutRtl);
-                int width = largestSize.x - padding.left - padding.right;
-                int height = smallestSize.y - padding.top - padding.bottom;
-                mLandscapeCellLayoutMetrics = new Rect();
-                mLandscapeCellLayoutMetrics.set(
-                        DeviceProfile.calculateCellWidth(width, countX),
-                        DeviceProfile.calculateCellHeight(height, countY), 0, 0);
-            }
-            return mLandscapeCellLayoutMetrics;
-        } else if (orientation == CellLayout.PORTRAIT) {
-            if (mPortraitCellLayoutMetrics == null) {
-                Rect padding = inv.portraitProfile.getWorkspacePadding(isLayoutRtl);
-                int width = smallestSize.x - padding.left - padding.right;
-                int height = largestSize.y - padding.top - padding.bottom;
-                mPortraitCellLayoutMetrics = new Rect();
-                mPortraitCellLayoutMetrics.set(
-                        DeviceProfile.calculateCellWidth(width, countX),
-                        DeviceProfile.calculateCellHeight(height, countY), 0, 0);
-            }
-            return mPortraitCellLayoutMetrics;
-        }
-        return null;
-    }
-
     @Override
     public void onDragExit(DragObject d) {
         if (ENFORCE_DRAG_EVENT_ORDER) {
diff --git a/src/com/android/launcher3/WorkspaceStateTransitionAnimation.java b/src/com/android/launcher3/WorkspaceStateTransitionAnimation.java
index f097585..011f4a2 100644
--- a/src/com/android/launcher3/WorkspaceStateTransitionAnimation.java
+++ b/src/com/android/launcher3/WorkspaceStateTransitionAnimation.java
@@ -30,6 +30,7 @@
 import android.view.accessibility.AccessibilityNodeInfo;
 import android.view.animation.DecelerateInterpolator;
 
+import com.android.launcher3.dragndrop.DragLayer;
 import com.android.launcher3.util.Thunk;
 
 import java.util.HashMap;
diff --git a/src/com/android/launcher3/accessibility/LauncherAccessibilityDelegate.java b/src/com/android/launcher3/accessibility/LauncherAccessibilityDelegate.java
index c11aab9..9479685 100644
--- a/src/com/android/launcher3/accessibility/LauncherAccessibilityDelegate.java
+++ b/src/com/android/launcher3/accessibility/LauncherAccessibilityDelegate.java
@@ -20,7 +20,6 @@
 import com.android.launcher3.AppWidgetResizeFrame;
 import com.android.launcher3.CellLayout;
 import com.android.launcher3.DeleteDropTarget;
-import com.android.launcher3.DragController.DragListener;
 import com.android.launcher3.DragSource;
 import com.android.launcher3.Folder;
 import com.android.launcher3.FolderInfo;
@@ -36,6 +35,7 @@
 import com.android.launcher3.ShortcutInfo;
 import com.android.launcher3.UninstallDropTarget;
 import com.android.launcher3.Workspace;
+import com.android.launcher3.dragndrop.DragController.DragListener;
 import com.android.launcher3.util.Thunk;
 
 import java.util.ArrayList;
diff --git a/src/com/android/launcher3/allapps/AllAppsContainerView.java b/src/com/android/launcher3/allapps/AllAppsContainerView.java
index f5e06c5..a172d02 100644
--- a/src/com/android/launcher3/allapps/AllAppsContainerView.java
+++ b/src/com/android/launcher3/allapps/AllAppsContainerView.java
@@ -555,8 +555,9 @@
     @Override
     public void onLauncherTransitionEnd(Launcher l, boolean animated, boolean toWorkspace) {
         if (toWorkspace) {
-            // Reset the search bar after transitioning home
+            // Reset the search bar and base recycler view after transitioning home
             mSearchBarController.reset();
+            mAppsRecyclerView.reset();
         }
     }
 
diff --git a/src/com/android/launcher3/allapps/AllAppsRecyclerView.java b/src/com/android/launcher3/allapps/AllAppsRecyclerView.java
index a46af5e..5ec8bb2 100644
--- a/src/com/android/launcher3/allapps/AllAppsRecyclerView.java
+++ b/src/com/android/launcher3/allapps/AllAppsRecyclerView.java
@@ -27,6 +27,7 @@
 import com.android.launcher3.BaseRecyclerViewFastScrollBar;
 import com.android.launcher3.DeviceProfile;
 import com.android.launcher3.Stats;
+import com.android.launcher3.Utilities;
 import com.android.launcher3.util.Thunk;
 
 import java.util.List;
@@ -71,6 +72,7 @@
     public AllAppsRecyclerView(Context context, AttributeSet attrs, int defStyleAttr,
             int defStyleRes) {
         super(context, attrs, defStyleAttr);
+        mScrollbar.setDetachThumbOnFastScroll();
     }
 
     /**
@@ -167,8 +169,8 @@
         }
 
         // Map the touch position back to the scroll of the recycler view
-        getCurScrollState(mScrollPosState, mApps.getAdapterItems());
-        int availableScrollHeight = getAvailableScrollHeight(rowCount, mScrollPosState.rowHeight, 0);
+        getCurScrollState(mScrollPosState);
+        int availableScrollHeight = getAvailableScrollHeight(rowCount, mScrollPosState.rowHeight);
         LinearLayoutManager layoutManager = (LinearLayoutManager) getLayoutManager();
         if (mFastScrollMode == FAST_SCROLL_MODE_FREE_SCROLL) {
             layoutManager.scrollToPositionWithOffset(0, (int) -(availableScrollHeight * touchFraction));
@@ -215,24 +217,73 @@
      * Updates the bounds for the scrollbar.
      */
     @Override
-    public void onUpdateScrollbar() {
+    public void onUpdateScrollbar(int dy) {
         List<AlphabeticalAppsList.AdapterItem> items = mApps.getAdapterItems();
 
         // Skip early if there are no items or we haven't been measured
         if (items.isEmpty() || mNumAppsPerRow == 0) {
-            mScrollbar.setScrollbarThumbOffset(-1, -1);
+            mScrollbar.setThumbOffset(-1, -1);
             return;
         }
 
         // Find the index and height of the first visible row (all rows have the same height)
         int rowCount = mApps.getNumAppRows();
-        getCurScrollState(mScrollPosState, items);
+        getCurScrollState(mScrollPosState);
         if (mScrollPosState.rowIndex < 0) {
-            mScrollbar.setScrollbarThumbOffset(-1, -1);
+            mScrollbar.setThumbOffset(-1, -1);
             return;
         }
 
-        synchronizeScrollBarThumbOffsetToViewScroll(mScrollPosState, rowCount, 0);
+        // Only show the scrollbar if there is height to be scrolled
+        int availableScrollBarHeight = getAvailableScrollBarHeight();
+        int availableScrollHeight = getAvailableScrollHeight(mApps.getNumAppRows(), mScrollPosState.rowHeight);
+        if (availableScrollHeight <= 0) {
+            mScrollbar.setThumbOffset(-1, -1);
+            return;
+        }
+
+        // Calculate the current scroll position, the scrollY of the recycler view accounts for the
+        // view padding, while the scrollBarY is drawn right up to the background padding (ignoring
+        // padding)
+        int scrollY = getPaddingTop() +
+                (mScrollPosState.rowIndex * mScrollPosState.rowHeight) - mScrollPosState.rowTopOffset;
+        int scrollBarY = mBackgroundPadding.top +
+                (int) (((float) scrollY / availableScrollHeight) * availableScrollBarHeight);
+
+        if (mScrollbar.isThumbDetached()) {
+            int scrollBarX;
+            if (Utilities.isRtl(getResources())) {
+                scrollBarX = mBackgroundPadding.left;
+            } else {
+                scrollBarX = getWidth() - mBackgroundPadding.right - mScrollbar.getThumbWidth();
+            }
+
+            if (mScrollbar.isDraggingThumb()) {
+                // If the thumb is detached, then just update the thumb to the current
+                // touch position
+                mScrollbar.setThumbOffset(scrollBarX, (int) mScrollbar.getLastTouchY());
+            } else {
+                int thumbScrollY = mScrollbar.getThumbOffset().y;
+                int diffScrollY = scrollBarY - thumbScrollY;
+                if (diffScrollY * dy > 0f) {
+                    // User is scrolling in the same direction the thumb needs to catch up to the
+                    // current scroll position.
+                    thumbScrollY += dy < 0 ? Math.max(dy, diffScrollY) : Math.min(dy, diffScrollY);
+                    thumbScrollY = Math.max(0, Math.min(availableScrollBarHeight, thumbScrollY));
+                    mScrollbar.setThumbOffset(scrollBarX, thumbScrollY);
+                    if (scrollBarY == thumbScrollY) {
+                        mScrollbar.reattachThumbToScroll();
+                    }
+                } else {
+                    // User is scrolling in an opposite direction to the direction that the thumb
+                    // needs to catch up to the scroll position.  Do nothing except for updating
+                    // the scroll bar x to match the thumb width.
+                    mScrollbar.setThumbOffset(scrollBarX, thumbScrollY);
+                }
+            }
+        } else {
+            synchronizeScrollBarThumbOffsetToViewScroll(mScrollPosState, rowCount);
+        }
     }
 
     /**
@@ -284,13 +335,13 @@
     /**
      * Returns the current scroll state of the apps rows.
      */
-    private void getCurScrollState(ScrollPositionState stateOut,
-            List<AlphabeticalAppsList.AdapterItem> items) {
+    protected void getCurScrollState(ScrollPositionState stateOut) {
         stateOut.rowIndex = -1;
         stateOut.rowTopOffset = -1;
         stateOut.rowHeight = -1;
 
         // Return early if there are no items or we haven't been measured
+        List<AlphabeticalAppsList.AdapterItem> items = mApps.getAdapterItems();
         if (items.isEmpty() || mNumAppsPerRow == 0) {
             return;
         }
diff --git a/src/com/android/launcher3/allapps/AlphabeticalAppsList.java b/src/com/android/launcher3/allapps/AlphabeticalAppsList.java
index cf53aa6..cb989e5 100644
--- a/src/com/android/launcher3/allapps/AlphabeticalAppsList.java
+++ b/src/com/android/launcher3/allapps/AlphabeticalAppsList.java
@@ -43,6 +43,11 @@
     private static final boolean DEBUG = false;
     private static final boolean DEBUG_PREDICTIONS = false;
 
+    private static final int FAST_SCROLL_FRACTION_DISTRIBUTE_BY_ROWS_FRACTION = 0;
+    private static final int FAST_SCROLL_FRACTION_DISTRIBUTE_BY_NUM_SECTIONS = 1;
+
+    private final int mFastScrollDistributionMode = FAST_SCROLL_FRACTION_DISTRIBUTE_BY_NUM_SECTIONS;
+
     /**
      * Info about a section in the alphabetic list
      */
@@ -85,8 +90,6 @@
         /** Section & App properties */
         // The section for this item
         public SectionInfo sectionInfo;
-        // The row that this item shows up on
-        public int rowIndex;
 
         /** App-only properties */
         // The section name of this app.  Note that there can be multiple items with different
@@ -94,6 +97,8 @@
         public String sectionName = null;
         // The index of this app in the section
         public int sectionAppIndex = -1;
+        // The row that this item shows up on
+        public int rowIndex;
         // The index of this app in the row
         public int rowAppIndex;
         // The associated AppInfo for the app
@@ -515,18 +520,36 @@
             }
             mNumAppRowsInAdapter = rowIndex + 1;
 
-            // Pre-calculate all the fast scroller fractions based on the number of rows
-            float rowFraction = 1f / mNumAppRowsInAdapter;
-            for (FastScrollSectionInfo info : mFastScrollerSections) {
-                AdapterItem item = info.fastScrollToItem;
-                if (item.viewType != AllAppsGridAdapter.ICON_VIEW_TYPE &&
-                        item.viewType != AllAppsGridAdapter.PREDICTION_ICON_VIEW_TYPE) {
-                    info.touchFraction = 0f;
-                    continue;
-                }
+            // Pre-calculate all the fast scroller fractions
+            switch (mFastScrollDistributionMode) {
+                case FAST_SCROLL_FRACTION_DISTRIBUTE_BY_ROWS_FRACTION:
+                    float rowFraction = 1f / mNumAppRowsInAdapter;
+                    for (FastScrollSectionInfo info : mFastScrollerSections) {
+                        AdapterItem item = info.fastScrollToItem;
+                        if (item.viewType != AllAppsGridAdapter.ICON_VIEW_TYPE &&
+                                item.viewType != AllAppsGridAdapter.PREDICTION_ICON_VIEW_TYPE) {
+                            info.touchFraction = 0f;
+                            continue;
+                        }
 
-                float subRowFraction = item.rowAppIndex * (rowFraction / mNumAppsPerRow);
-                info.touchFraction = item.rowIndex * rowFraction + subRowFraction;
+                        float subRowFraction = item.rowAppIndex * (rowFraction / mNumAppsPerRow);
+                        info.touchFraction = item.rowIndex * rowFraction + subRowFraction;
+                    }
+                    break;
+                case FAST_SCROLL_FRACTION_DISTRIBUTE_BY_NUM_SECTIONS:
+                    float perSectionTouchFraction = 1f / mFastScrollerSections.size();
+                    float cumulativeTouchFraction = 0f;
+                    for (FastScrollSectionInfo info : mFastScrollerSections) {
+                        AdapterItem item = info.fastScrollToItem;
+                        if (item.viewType != AllAppsGridAdapter.ICON_VIEW_TYPE &&
+                                item.viewType != AllAppsGridAdapter.PREDICTION_ICON_VIEW_TYPE) {
+                            info.touchFraction = 0f;
+                            continue;
+                        }
+                        info.touchFraction = cumulativeTouchFraction;
+                        cumulativeTouchFraction += perSectionTouchFraction;
+                    }
+                    break;
             }
         }
 
diff --git a/src/com/android/launcher3/DragController.java b/src/com/android/launcher3/dragndrop/DragController.java
similarity index 97%
rename from src/com/android/launcher3/DragController.java
rename to src/com/android/launcher3/dragndrop/DragController.java
index ea41f3f..8777dc6 100644
--- a/src/com/android/launcher3/DragController.java
+++ b/src/com/android/launcher3/dragndrop/DragController.java
@@ -14,7 +14,7 @@
  * limitations under the License.
  */
 
-package com.android.launcher3;
+package com.android.launcher3.dragndrop;
 
 import android.content.ComponentName;
 import android.content.Context;
@@ -35,8 +35,18 @@
 import android.view.ViewConfiguration;
 import android.view.inputmethod.InputMethodManager;
 
+import com.android.launcher3.DeleteDropTarget;
+import com.android.launcher3.DragSource;
+import com.android.launcher3.DropTarget;
+import com.android.launcher3.ItemInfo;
+import com.android.launcher3.Launcher;
+import com.android.launcher3.PagedView;
+import com.android.launcher3.ShortcutInfo;
+import com.android.launcher3.Utilities;
 import com.android.launcher3.util.Thunk;
 
+import com.android.launcher3.R;
+
 import java.util.ArrayList;
 import java.util.HashSet;
 
@@ -60,9 +70,9 @@
     private static final int SCROLL_OUTSIDE_ZONE = 0;
     private static final int SCROLL_WAITING_IN_ZONE = 1;
 
-    static final int SCROLL_NONE = -1;
-    static final int SCROLL_LEFT = 0;
-    static final int SCROLL_RIGHT = 1;
+    public static final int SCROLL_NONE = -1;
+    public static final int SCROLL_LEFT = 0;
+    public static final int SCROLL_RIGHT = 1;
 
     private static final float MAX_FLING_DEGREES = 35f;
 
@@ -159,9 +169,8 @@
         mScrollZone = r.getDimensionPixelSize(R.dimen.scroll_zone);
         mVelocityTracker = VelocityTracker.obtain();
 
-        float density = r.getDisplayMetrics().density;
         mFlingToDeleteThresholdVelocity =
-                (int) (r.getInteger(R.integer.config_flingToDeleteMinVelocity) * density);
+                r.getDimensionPixelSize(R.dimen.drag_flingToDeleteMinVelocity);
         mIsRtl = Utilities.isRtl(r);
     }
 
@@ -420,7 +429,7 @@
         return mTmpPoint;
     }
 
-    long getLastGestureUpTime() {
+    public long getLastGestureUpTime() {
         if (mDragDriver != null) {
             return System.currentTimeMillis();
         } else {
@@ -428,7 +437,7 @@
         }
     }
 
-    void resetLastGestureUpTime() {
+    public void resetLastGestureUpTime() {
         mLastTouchUpTime = -1;
     }
 
@@ -536,7 +545,7 @@
     /**
      * Sets the view that should handle move events.
      */
-    void setMoveTarget(View view) {
+    public void setMoveTarget(View view) {
         mMoveTarget = view;
     }    
 
diff --git a/src/com/android/launcher3/DragDriver.java b/src/com/android/launcher3/dragndrop/DragDriver.java
similarity index 97%
rename from src/com/android/launcher3/DragDriver.java
rename to src/com/android/launcher3/dragndrop/DragDriver.java
index 12545fb..6e4b430 100644
--- a/src/com/android/launcher3/DragDriver.java
+++ b/src/com/android/launcher3/dragndrop/DragDriver.java
@@ -14,7 +14,12 @@
  * limitations under the License.
  */
 
-package com.android.launcher3;
+package com.android.launcher3.dragndrop;
+
+import com.android.launcher3.AnotherWindowDropTarget;
+import com.android.launcher3.DropTarget;
+import com.android.launcher3.ItemInfo;
+import com.android.launcher3.Utilities;
 
 import android.content.ClipData;
 import android.content.Intent;
diff --git a/src/com/android/launcher3/DragLayer.java b/src/com/android/launcher3/dragndrop/DragLayer.java
similarity index 97%
rename from src/com/android/launcher3/DragLayer.java
rename to src/com/android/launcher3/dragndrop/DragLayer.java
index f523c49..741d5e6 100644
--- a/src/com/android/launcher3/DragLayer.java
+++ b/src/com/android/launcher3/dragndrop/DragLayer.java
@@ -14,7 +14,7 @@
  * limitations under the License.
  */
 
-package com.android.launcher3;
+package com.android.launcher3.dragndrop;
 
 import android.animation.Animator;
 import android.animation.AnimatorListenerAdapter;
@@ -40,9 +40,24 @@
 import android.widget.FrameLayout;
 import android.widget.TextView;
 
+import com.android.launcher3.AppWidgetResizeFrame;
+import com.android.launcher3.CellLayout;
+import com.android.launcher3.Folder;
+import com.android.launcher3.FolderIcon;
+import com.android.launcher3.InsettableFrameLayout;
+import com.android.launcher3.ItemInfo;
+import com.android.launcher3.Launcher;
+import com.android.launcher3.LauncherAppState;
+import com.android.launcher3.LauncherAppWidgetHostView;
+import com.android.launcher3.SearchDropTargetBar;
+import com.android.launcher3.ShortcutAndWidgetContainer;
+import com.android.launcher3.Utilities;
+import com.android.launcher3.Workspace;
 import com.android.launcher3.accessibility.LauncherAccessibilityDelegate;
 import com.android.launcher3.util.Thunk;
 
+import com.android.launcher3.R;
+
 import java.util.ArrayList;
 
 /**
@@ -890,7 +905,7 @@
         invalidate();
     }
 
-    void showPageHints() {
+    public void showPageHints() {
         mShowPageHints = true;
         Workspace workspace = mLauncher.getWorkspace();
         getDescendantRectRelativeToSelf(workspace.getChildAt(workspace.numCustomPages()),
@@ -898,7 +913,7 @@
         invalidate();
     }
 
-    void hidePageHints() {
+    public void hidePageHints() {
         mShowPageHints = false;
         invalidate();
     }
diff --git a/src/com/android/launcher3/DragScroller.java b/src/com/android/launcher3/dragndrop/DragScroller.java
similarity index 96%
rename from src/com/android/launcher3/DragScroller.java
rename to src/com/android/launcher3/dragndrop/DragScroller.java
index e261f15..165d0b1 100644
--- a/src/com/android/launcher3/DragScroller.java
+++ b/src/com/android/launcher3/dragndrop/DragScroller.java
@@ -14,7 +14,7 @@
  * limitations under the License.
  */
 
-package com.android.launcher3;
+package com.android.launcher3.dragndrop;
 
 /**
  * Handles scrolling while dragging
diff --git a/src/com/android/launcher3/DragView.java b/src/com/android/launcher3/dragndrop/DragView.java
similarity index 98%
rename from src/com/android/launcher3/DragView.java
rename to src/com/android/launcher3/dragndrop/DragView.java
index 235cff0..88e11fa 100644
--- a/src/com/android/launcher3/DragView.java
+++ b/src/com/android/launcher3/dragndrop/DragView.java
@@ -14,7 +14,7 @@
  * limitations under the License.
  */
 
-package com.android.launcher3;
+package com.android.launcher3.dragndrop;
 
 import android.animation.Animator;
 import android.animation.AnimatorListenerAdapter;
@@ -35,7 +35,14 @@
 import android.os.Build;
 import android.view.View;
 import android.view.animation.DecelerateInterpolator;
+
+import com.android.launcher3.Launcher;
+import com.android.launcher3.LauncherAnimUtils;
+import com.android.launcher3.Utilities;
 import com.android.launcher3.util.Thunk;
+
+import com.android.launcher3.R;
+
 import java.util.Arrays;
 
 public class DragView extends View {
diff --git a/src/com/android/launcher3/SpringLoadedDragController.java b/src/com/android/launcher3/dragndrop/SpringLoadedDragController.java
similarity index 89%
rename from src/com/android/launcher3/SpringLoadedDragController.java
rename to src/com/android/launcher3/dragndrop/SpringLoadedDragController.java
index 45edaef..d7f41c9 100644
--- a/src/com/android/launcher3/SpringLoadedDragController.java
+++ b/src/com/android/launcher3/dragndrop/SpringLoadedDragController.java
@@ -14,7 +14,13 @@
  * limitations under the License.
  */
 
-package com.android.launcher3;
+package com.android.launcher3.dragndrop;
+
+import com.android.launcher3.Alarm;
+import com.android.launcher3.CellLayout;
+import com.android.launcher3.Launcher;
+import com.android.launcher3.OnAlarmListener;
+import com.android.launcher3.Workspace;
 
 public class SpringLoadedDragController implements OnAlarmListener {
     // how long the user must hover over a mini-screen before it unshrinks
diff --git a/src/com/android/launcher3/util/FlingAnimation.java b/src/com/android/launcher3/util/FlingAnimation.java
index 55c5d7d..f82038b 100644
--- a/src/com/android/launcher3/util/FlingAnimation.java
+++ b/src/com/android/launcher3/util/FlingAnimation.java
@@ -7,9 +7,9 @@
 import android.graphics.Rect;
 import android.view.animation.DecelerateInterpolator;
 
-import com.android.launcher3.DragLayer;
-import com.android.launcher3.DragView;
 import com.android.launcher3.DropTarget.DragObject;
+import com.android.launcher3.dragndrop.DragLayer;
+import com.android.launcher3.dragndrop.DragView;
 
 public class FlingAnimation implements AnimatorUpdateListener {
 
diff --git a/src/com/android/launcher3/widget/WidgetHostViewLoader.java b/src/com/android/launcher3/widget/WidgetHostViewLoader.java
index 1966f9f..7607d85 100644
--- a/src/com/android/launcher3/widget/WidgetHostViewLoader.java
+++ b/src/com/android/launcher3/widget/WidgetHostViewLoader.java
@@ -10,14 +10,14 @@
 import android.view.View;
 
 import com.android.launcher3.AppWidgetResizeFrame;
-import com.android.launcher3.DragController.DragListener;
-import com.android.launcher3.DragLayer;
 import com.android.launcher3.DragSource;
 import com.android.launcher3.ItemInfo;
 import com.android.launcher3.Launcher;
 import com.android.launcher3.LauncherAppWidgetProviderInfo;
 import com.android.launcher3.Utilities;
 import com.android.launcher3.compat.AppWidgetManagerCompat;
+import com.android.launcher3.dragndrop.DragController.DragListener;
+import com.android.launcher3.dragndrop.DragLayer;
 import com.android.launcher3.util.Thunk;
 
 public class WidgetHostViewLoader implements DragListener {
diff --git a/src/com/android/launcher3/widget/WidgetsContainerView.java b/src/com/android/launcher3/widget/WidgetsContainerView.java
index fd6d28b..e6059d5 100644
--- a/src/com/android/launcher3/widget/WidgetsContainerView.java
+++ b/src/com/android/launcher3/widget/WidgetsContainerView.java
@@ -32,7 +32,6 @@
 import com.android.launcher3.CellLayout;
 import com.android.launcher3.DeleteDropTarget;
 import com.android.launcher3.DeviceProfile;
-import com.android.launcher3.DragController;
 import com.android.launcher3.DragSource;
 import com.android.launcher3.DropTarget.DragObject;
 import com.android.launcher3.Folder;
@@ -45,6 +44,7 @@
 import com.android.launcher3.Utilities;
 import com.android.launcher3.WidgetPreviewLoader;
 import com.android.launcher3.Workspace;
+import com.android.launcher3.dragndrop.DragController;
 import com.android.launcher3.model.WidgetsModel;
 import com.android.launcher3.util.Thunk;
 
@@ -90,7 +90,7 @@
         super(context, attrs, defStyleAttr);
         mLauncher = (Launcher) context;
         mDragController = mLauncher.getDragController();
-        mAdapter = new WidgetsListAdapter(context, this, this, mLauncher);
+        mAdapter = new WidgetsListAdapter(this, this, mLauncher);
         mIconCache = (LauncherAppState.getInstance()).getIconCache();
         if (DEBUG) {
             Log.d(TAG, "WidgetsContainerView constructor");
diff --git a/src/com/android/launcher3/widget/WidgetsListAdapter.java b/src/com/android/launcher3/widget/WidgetsListAdapter.java
index 885d96f..ac9d62e 100644
--- a/src/com/android/launcher3/widget/WidgetsListAdapter.java
+++ b/src/com/android/launcher3/widget/WidgetsListAdapter.java
@@ -64,20 +64,17 @@
     private View.OnClickListener mIconClickListener;
     private View.OnLongClickListener mIconLongClickListener;
 
-    private static final int PRESET_INDENT_SIZE_TABLET = 56;
-    private int mIndent = 0;
+    private final int mIndent;
 
-    public WidgetsListAdapter(Context context,
-            View.OnClickListener iconClickListener,
+    public WidgetsListAdapter(View.OnClickListener iconClickListener,
             View.OnLongClickListener iconLongClickListener,
             Launcher launcher) {
-        mLayoutInflater = LayoutInflater.from(context);
+        mLayoutInflater = launcher.getLayoutInflater();
 
         mIconClickListener = iconClickListener;
         mIconLongClickListener = iconLongClickListener;
         mLauncher = launcher;
-
-        setContainerHeight();
+        mIndent = launcher.getResources().getDimensionPixelSize(R.dimen.widget_section_indent);
     }
 
     public void setWidgetsModel(WidgetsModel w) {
@@ -206,12 +203,4 @@
         }
         return mWidgetPreviewLoader;
     }
-
-    private void setContainerHeight() {
-        Resources r = mLauncher.getResources();
-        DeviceProfile profile = mLauncher.getDeviceProfile();
-        if (profile.isLargeTablet || profile.isTablet) {
-            mIndent = Utilities.pxFromDp(PRESET_INDENT_SIZE_TABLET, r.getDisplayMetrics());
-        }
-    }
 }
diff --git a/src/com/android/launcher3/widget/WidgetsRecyclerView.java b/src/com/android/launcher3/widget/WidgetsRecyclerView.java
index 61e63cd..e586dc2 100644
--- a/src/com/android/launcher3/widget/WidgetsRecyclerView.java
+++ b/src/com/android/launcher3/widget/WidgetsRecyclerView.java
@@ -102,7 +102,7 @@
 
         getCurScrollState(mScrollPosState);
         float pos = rowCount * touchFraction;
-        int availableScrollHeight = getAvailableScrollHeight(rowCount, mScrollPosState.rowHeight, 0);
+        int availableScrollHeight = getAvailableScrollHeight(rowCount, mScrollPosState.rowHeight);
         LinearLayoutManager layoutManager = ((LinearLayoutManager) getLayoutManager());
         layoutManager.scrollToPositionWithOffset(0, (int) -(availableScrollHeight * touchFraction));
 
@@ -115,29 +115,29 @@
      * Updates the bounds for the scrollbar.
      */
     @Override
-    public void onUpdateScrollbar() {
+    public void onUpdateScrollbar(int dy) {
         int rowCount = mWidgets.getPackageSize();
 
         // Skip early if, there are no items.
         if (rowCount == 0) {
-            mScrollbar.setScrollbarThumbOffset(-1, -1);
+            mScrollbar.setThumbOffset(-1, -1);
             return;
         }
 
         // Skip early if, there no child laid out in the container.
         getCurScrollState(mScrollPosState);
         if (mScrollPosState.rowIndex < 0) {
-            mScrollbar.setScrollbarThumbOffset(-1, -1);
+            mScrollbar.setThumbOffset(-1, -1);
             return;
         }
 
-        synchronizeScrollBarThumbOffsetToViewScroll(mScrollPosState, rowCount, 0);
+        synchronizeScrollBarThumbOffsetToViewScroll(mScrollPosState, rowCount);
     }
 
     /**
      * Returns the current scroll state.
      */
-    private void getCurScrollState(ScrollPositionState stateOut) {
+    protected void getCurScrollState(ScrollPositionState stateOut) {
         stateOut.rowIndex = -1;
         stateOut.rowTopOffset = -1;
         stateOut.rowHeight = -1;