Make drag shadow work across entire layout

Move drag shadow view into main layout so that it can be drawn
over all other views.

Also offset it accordingly based on its parent's X/Y coordinates

Bug: 14393052
Change-Id: I957469cf505d30812b539517d2aeab3f72a733ca

2 files changed, 21 insertions, 17 deletions

diff --git a/src/com/android/dialer/list/PhoneFavoriteListView.java b/src/com/android/dialer/list/PhoneFavoriteListView.java
index 074cc07d6..4ecc1cd90 100644
--- a/src/com/android/dialer/list/PhoneFavoriteListView.java
+++ b/src/com/android/dialer/list/PhoneFavoriteListView.java
@@ -59,6 +59,7 @@ public class PhoneFavoriteListView extends GridView implements OnDragDropListene
 
     private Bitmap mDragShadowBitmap;
     private ImageView mDragShadowOverlay;
+    private View mDragShadowParent;
     private int mAnimationDuration;
 
     final int[] mLocationOnScreen = new int[2];
@@ -190,6 +191,7 @@ public class PhoneFavoriteListView extends GridView implements OnDragDropListene
 
     public void setDragShadowOverlay(ImageView overlay) {
         mDragShadowOverlay = overlay;
+        mDragShadowParent = (View) mDragShadowOverlay.getParent();
     }
 
     /**
@@ -230,10 +232,21 @@ public class PhoneFavoriteListView extends GridView implements OnDragDropListene
             return;
         }
 
-        // Square tile is relative to the contact tile,
-        // and contact tile is relative to this list view.
-        mDragShadowLeft = tileView.getLeft();
-        mDragShadowTop = tileView.getTop();
+        tileView.getLocationOnScreen(mLocationOnScreen);
+        mDragShadowLeft = mLocationOnScreen[0];
+        mDragShadowTop = mLocationOnScreen[1];
+
+        // x and y are the coordinates of the on-screen touch event. Using these
+        // and the on-screen location of the tileView, calculate the difference between
+        // the position of the user's finger and the position of the tileView. These will
+        // be used to offset the location of the drag shadow so that it appears that the
+        // tileView is positioned directly under the user's finger.
+        mTouchOffsetToChildLeft = x - mDragShadowLeft;
+        mTouchOffsetToChildTop = y - mDragShadowTop;
+
+        mDragShadowParent.getLocationOnScreen(mLocationOnScreen);
+        mDragShadowLeft -= mLocationOnScreen[0];
+        mDragShadowTop -= mLocationOnScreen[1];
 
         mDragShadowOverlay.setImageBitmap(mDragShadowBitmap);
         mDragShadowOverlay.setVisibility(VISIBLE);
@@ -241,19 +254,14 @@ public class PhoneFavoriteListView extends GridView implements OnDragDropListene
 
         mDragShadowOverlay.setX(mDragShadowLeft);
         mDragShadowOverlay.setY(mDragShadowTop);
-
-        // x and y passed in are the coordinates of where the user has touched down,
-        // calculate the offset to the top left coordinate of the dragged child.  This
-        // will be used for drawing the drag shadow.
-        mTouchOffsetToChildLeft = x - mDragShadowLeft;
-        mTouchOffsetToChildTop = y - mDragShadowTop;
     }
 
     @Override
     public void onDragHovered(int x, int y, PhoneFavoriteSquareTileView tileView) {
         // Update the drag shadow location.
-        mDragShadowLeft = x - mTouchOffsetToChildLeft;
-        mDragShadowTop = y - mTouchOffsetToChildTop;
+        mDragShadowParent.getLocationOnScreen(mLocationOnScreen);
+        mDragShadowLeft = x - mTouchOffsetToChildLeft - mLocationOnScreen[0];
+        mDragShadowTop = y - mTouchOffsetToChildTop - mLocationOnScreen[1];
         // Draw the drag shadow at its last known location if the drag shadow exists.
         if (mDragShadowOverlay != null) {
             mDragShadowOverlay.setX(mDragShadowLeft);
@@ -263,10 +271,6 @@ public class PhoneFavoriteListView extends GridView implements OnDragDropListene
 
     @Override
     public void onDragFinished(int x, int y) {
-        // Update the drag shadow location.
-        mDragShadowLeft = x - mTouchOffsetToChildLeft;
-        mDragShadowTop = y - mTouchOffsetToChildTop;
-
         if (mDragShadowOverlay != null) {
             mDragShadowOverlay.clearAnimation();
             mDragShadowOverlay.animate().alpha(0.0f)
diff --git a/src/com/android/dialer/list/SpeedDialFragment.java b/src/com/android/dialer/list/SpeedDialFragment.java
index cfcea9ddb..0399bf7d5 100644
--- a/src/com/android/dialer/list/SpeedDialFragment.java
+++ b/src/com/android/dialer/list/SpeedDialFragment.java
@@ -206,7 +206,7 @@ public class SpeedDialFragment extends Fragment implements OnItemClickListener,
         mListView.getDragDropController().addOnDragDropListener(mContactTileAdapter);
 
         final ImageView dragShadowOverlay =
-                (ImageView) mParentView.findViewById(R.id.contact_tile_drag_shadow_overlay);
+                (ImageView) getActivity().findViewById(R.id.contact_tile_drag_shadow_overlay);
         mListView.setDragShadowOverlay(dragShadowOverlay);
 
         mEmptyView = mParentView.findViewById(R.id.phone_no_favorites_view);