commit d683d98b34ffa75111f556f3b6950e89ba1fd13c
author Tony Wickham <twickham@google.com> Wed Dec 23 16:12:18 2020 -0600
committer Tony Wickham <twickham@google.com> Fri Jan 29 21:22:00 2021 +0000
tree 3f6856fbff608c15bf2ba9ad26230a32ec812871
parent d4629656980f3d8d3b62ca50c784c27b137060fc

Animate taskbar background alpha and visibility alpha

Setup codepath to animate the Taskbar when going to and from Launcher,
primarily by listening for pause/resume signals but also hints from
gesture nav and AppToOverviewAnimationProvider.

Additionally, add TaskbarStateHandler to listen for Launcher state
changes if Taskbar is enabled. Combined, the end behavior is:

- Background alpha is 0 when Launcher is resumed, and 1 when Launcher
  is paused (we can make this animation more interesting later).
- Taskbar is always visible when Launcher is paused, otherwise its
  visibility is determined by multiple factors: LauncherState and
  whether the IME is showing.

Bug: 171917176
Change-Id: I7856fc979931c9d12d714dee11d179fd1b5a6968

src/com/android/launcher3/states/StateAnimationConfig.java

diff --git a/src/com/android/launcher3/states/StateAnimationConfig.java b/src/com/android/launcher3/states/StateAnimationConfig.java
index 8b72177..ec949eb 100644
--- a/src/com/android/launcher3/states/StateAnimationConfig.java
+++ b/src/com/android/launcher3/states/StateAnimationConfig.java
@@ -37,7 +37,8 @@
             PLAY_ATOMIC_OVERVIEW_SCALE,
             PLAY_ATOMIC_OVERVIEW_PEEK,
             SKIP_OVERVIEW,
-            SKIP_DEPTH_CONTROLLER
+            SKIP_DEPTH_CONTROLLER,
+            SKIP_TASKBAR,
     })
     @Retention(RetentionPolicy.SOURCE)
     public @interface AnimationFlags {}
@@ -46,6 +47,7 @@
     public static final int PLAY_ATOMIC_OVERVIEW_PEEK = 1 << 2;
     public static final int SKIP_OVERVIEW = 1 << 3;
     public static final int SKIP_DEPTH_CONTROLLER = 1 << 4;
+    public static final int SKIP_TASKBAR = 1 << 5;
 
     public long duration;
     public boolean userControlled;
@@ -72,6 +74,7 @@
             ANIM_OVERVIEW_MODAL,
             ANIM_DEPTH,
             ANIM_OVERVIEW_ACTIONS_FADE,
+            ANIM_TASKBAR_FADE,
     })
     @Retention(RetentionPolicy.SOURCE)
     public @interface AnimType {}
@@ -91,8 +94,9 @@
     public static final int ANIM_OVERVIEW_MODAL = 13;
     public static final int ANIM_DEPTH = 14;
     public static final int ANIM_OVERVIEW_ACTIONS_FADE = 15;
+    public static final int ANIM_TASKBAR_FADE = 16;
 
-    private static final int ANIM_TYPES_COUNT = 16;
+    private static final int ANIM_TYPES_COUNT = 17;
 
     protected final Interpolator[] mInterpolators = new Interpolator[ANIM_TYPES_COUNT];