1 files changed, 30 insertions, 0 deletions
diff --git a/src/com/android/launcher3/LauncherAnimatorUpdateListener.java b/src/com/android/launcher3/LauncherAnimatorUpdateListener.java
new file mode 100644
index 000000000..ec9fd4d16
--- /dev/null
+++ b/src/com/android/launcher3/LauncherAnimatorUpdateListener.java
@@ -0,0 +1,30 @@
+/*
+ * Copyright (C) 2011 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;
+
+import android.animation.ValueAnimator;
+import android.animation.ValueAnimator.AnimatorUpdateListener;
+
+abstract class LauncherAnimatorUpdateListener implements AnimatorUpdateListener {
+    public void onAnimationUpdate(ValueAnimator animation) {
+        final float b = (Float) animation.getAnimatedValue();
+        final float a = 1f - b;
+        onAnimationUpdate(a, b);
+    }
+
+    abstract void onAnimationUpdate(float a, float b);
+}
+\ No newline at end of file