1 files changed, 57 insertions, 0 deletions
diff --git a/src/com/android/launcher3/anim/RoundedRectRevealOutlineProvider.java b/src/com/android/launcher3/anim/RoundedRectRevealOutlineProvider.java
new file mode 100644
index 000000000..9c09477bb
--- /dev/null
+++ b/src/com/android/launcher3/anim/RoundedRectRevealOutlineProvider.java
@@ -0,0 +1,57 @@
+/*
+ * Copyright (C) 2017 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.launcher3.anim;
+
+import android.graphics.Rect;
+
+/**
+ * A {@link RevealOutlineAnimation} that provides an outline that interpolates between two radii
+ * and two {@link Rect}s.
+ *
+ * An example usage of this provider is an outline that starts out as a circle and ends
+ * as a rounded rectangle.
+ */
+public class RoundedRectRevealOutlineProvider extends RevealOutlineAnimation {
+    private final float mStartRadius;
+    private final float mEndRadius;
+
+    private final Rect mStartRect;
+    private final Rect mEndRect;
+
+    public RoundedRectRevealOutlineProvider(float startRadius, float endRadius, Rect startRect,
+            Rect endRect) {
+        mStartRadius = startRadius;
+        mEndRadius = endRadius;
+        mStartRect = startRect;
+        mEndRect = endRect;
+    }
+
+    @Override
+    public boolean shouldRemoveElevationDuringAnimation() {
+        return false;
+    }
+
+    @Override
+    public void setProgress(float progress) {
+        mOutlineRadius = (1 - progress) * mStartRadius + progress * mEndRadius;
+
+        mOutline.left = (int) ((1 - progress) * mStartRect.left + progress * mEndRect.left);
+        mOutline.top = (int) ((1 - progress) * mStartRect.top + progress * mEndRect.top);
+        mOutline.right = (int) ((1 - progress) * mStartRect.right + progress * mEndRect.right);
+        mOutline.bottom = (int) ((1 - progress) * mStartRect.bottom + progress * mEndRect.bottom);
+    }
+}