Use the icon bounds for all calculations.

- Fixes a drag and drop issue when the dynamic
grid scales icons down, due to the drawable bounds
not being equal to their bitmap sizes.

Change-Id: If7c68b51131de7bac3195a2619e22340f7789432

src/com/android/launcher3/DragView.java

@@ -51,6 +51,9 @@ public class DragView extends View {
     private float mOffsetX = 0.0f;
     private float mOffsetY = 0.0f;
     private float mInitialScale = 1f;
+    // The intrinsic icon scale factor is the scale factor for a drag icon over the workspace
+    // size.  This is ignored for non-icons.
+    private float mIntrinsicIconScale = 1f;
 
     /**
      * Construct the drag view.
@@ -120,6 +123,15 @@ public class DragView extends View {
         mPaint = new Paint(Paint.FILTER_BITMAP_FLAG);
     }
 
+    /** Sets the scale of the view over the normal workspace icon size. */
+    public void setIntrinsicIconScaleFactor(float scale) {
+        mIntrinsicIconScale = scale;
+    }
+
+    public float getIntrinsicIconScaleFactor() {
+        return mIntrinsicIconScale;
+    }
+
     public float getOffsetY() {
         return mOffsetY;
     }