Smooth animation when dropping a widget in multi-window mode.

Factored in app widget scaling in methods related to estimating
widget size and positions.
ie. Dropping a widget that needs to be resized to fit in the
workspace.

Bug: 32176631
Change-Id: I106fe12041565a090047f146a07d4bc80a074b4a

1 files changed, 11 insertions, 12 deletions

diff --git a/src/com/android/launcher3/Utilities.java b/src/com/android/launcher3/Utilities.java
index 197aaf752..ce6d5a40f 100644
--- a/src/com/android/launcher3/Utilities.java
+++ b/src/com/android/launcher3/Utilities.java
@@ -249,19 +249,18 @@ public final class Utilities {
         return delta;
     }
 
-    public static void scaleRectAboutCenter(Rect r, float scale) {
-        if (scale != 1.0f) {
-            int cx = r.centerX();
-            int cy = r.centerY();
-            r.offset(-cx, -cy);
-
-            r.left = (int) (r.left * scale + 0.5f);
-            r.top = (int) (r.top * scale + 0.5f);
-            r.right = (int) (r.right * scale + 0.5f);
-            r.bottom = (int) (r.bottom * scale + 0.5f);
-
-            r.offset(cx, cy);
+    public static float shrinkRectAboutCenter(Rect r, float scaleX, float scaleY) {
+        float scale = Math.min(Math.min(scaleX, scaleY), 1.0f);
+        if (scale < 1.0f) {
+            int deltaX = (int) (r.width() * (scaleX - scale) * 0.5f);
+            r.left += deltaX;
+            r.right -= deltaX;
+
+            int deltaY = (int) (r.height() * (scaleY - scale) * 0.5f);
+            r.top += deltaY;
+            r.bottom -= deltaY;
         }
+        return scale;
     }
 
     public static void startActivityForResultSafely(