From 68e01dda46f1dabfbe7ea8252b29f9381326e481 Mon Sep 17 00:00:00 2001
From: Andy Wickham <awickham@google.com>
Date: Mon, 14 Oct 2019 15:31:34 -0700
Subject: [PATCH] Fades out Assistant when entering Overview.

This makes the transition smoother, since
the Assistant goes away at the end of it.

Note this only applies to the transition
while an app other than Launcher is live.

Before: https://drive.google.com/open?id=18SOWTtTUzt19TReAYnofQLIShJ2I-odP
After: https://drive.google.com/open?id=1hqsikXSlCnSvNg0ZQYHxP-OIbS5yt9aW

Bug: 136282913
Change-Id: Ia53c2407c82725c776f27b0d6e80a34554b4a303
Tested: Manually
---
 .../quickstep/util/AppWindowAnimationHelper.java       | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/quickstep/recents_ui_overrides/src/com/android/quickstep/util/AppWindowAnimationHelper.java b/quickstep/recents_ui_overrides/src/com/android/quickstep/util/AppWindowAnimationHelper.java
index 5eee897350..24e7f0ecea 100644
--- a/quickstep/recents_ui_overrides/src/com/android/quickstep/util/AppWindowAnimationHelper.java
+++ b/quickstep/recents_ui_overrides/src/com/android/quickstep/util/AppWindowAnimationHelper.java
@@ -35,10 +35,11 @@ import com.android.launcher3.BaseDraggingActivity;
 import com.android.launcher3.DeviceProfile;
 import com.android.launcher3.LauncherState;
 import com.android.launcher3.R;
+import com.android.launcher3.Utilities;
+import com.android.launcher3.anim.Interpolators;
+import com.android.launcher3.views.BaseDragLayer;
 import com.android.quickstep.RemoteAnimationTargets;
 import com.android.quickstep.SystemUiProxy;
-import com.android.launcher3.Utilities;
-import com.android.launcher3.views.BaseDragLayer;
 import com.android.quickstep.views.RecentsView;
 import com.android.quickstep.views.TaskThumbnailView;
 import com.android.quickstep.views.TaskView;
@@ -200,6 +201,11 @@ public class AppWindowAnimationHelper {
                         }
                         mCurrentCornerRadius = cornerRadius;
                     }
+                    // Fade out Assistant overlay.
+                    if (app.activityType == RemoteAnimationTargetCompat.ACTIVITY_TYPE_ASSISTANT
+                            && app.isNotInRecents) {
+                        alpha = 1 - Interpolators.DEACCEL_2_5.getInterpolation(progress);
+                    }
                 } else if (params.targetSet.hasRecents) {
                     // If home has a different target then recents, reverse anim the
                     // home target.