1 files changed, 53 insertions, 0 deletions
diff --git a/quickstep/src/com/android/quickstep/util/RemoteFadeOutAnimationListener.java b/quickstep/src/com/android/quickstep/util/RemoteFadeOutAnimationListener.java
new file mode 100644
index 000000000..40dd74bbb
--- /dev/null
+++ b/quickstep/src/com/android/quickstep/util/RemoteFadeOutAnimationListener.java
@@ -0,0 +1,53 @@
+/*
+ * Copyright (C) 2018 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.quickstep.util;
+
+import static com.android.quickstep.util.RemoteAnimationProvider.prepareTargetsForFirstFrame;
+import static com.android.systemui.shared.system.RemoteAnimationTargetCompat.MODE_CLOSING;
+
+import android.animation.ValueAnimator;
+import android.animation.ValueAnimator.AnimatorUpdateListener;
+
+import com.android.systemui.shared.system.RemoteAnimationTargetCompat;
+import com.android.systemui.shared.system.TransactionCompat;
+
+/**
+ * Animation listener which fades out the closing targets
+ */
+public class RemoteFadeOutAnimationListener implements AnimatorUpdateListener {
+
+    private final RemoteAnimationTargetSet mTarget;
+    private boolean mFirstFrame = true;
+
+    public RemoteFadeOutAnimationListener(RemoteAnimationTargetCompat[] targets) {
+        mTarget = new RemoteAnimationTargetSet(targets, MODE_CLOSING);
+    }
+
+    @Override
+    public void onAnimationUpdate(ValueAnimator valueAnimator) {
+        TransactionCompat t = new TransactionCompat();
+        if (mFirstFrame) {
+            prepareTargetsForFirstFrame(mTarget.unfilteredApps, t, MODE_CLOSING);
+            mFirstFrame = false;
+        }
+
+        float alpha = 1 - valueAnimator.getAnimatedFraction();
+        for (RemoteAnimationTargetCompat app : mTarget.apps) {
+            t.setAlpha(app.leash, alpha);
+        }
+        t.apply();
+    }
+}