commit 8687bc2131ce98ea0d058290dd21f03b5a429c82
author Winson Chung <winsonc@google.com> Thu Feb 27 23:34:24 2020 -0800
committer Winson Chung <winsonc@google.com> Fri Mar 06 14:45:20 2020 -0800
tree 1a49b06b2f30c0239d055b83c8c40626b12f8855
parent f67ab6c64d0691f7ff1ede3942179172122dac1e

Initial changes to support blur

- Add a new controller to update the background blur on either the
  launcher or app surfaces based on state or transition

Bug: 149792636

Change-Id: I6103cd3d53a00c8025558dd49bb73137e2980014

src/com/android/launcher3/Launcher.java

diff --git a/src/com/android/launcher3/Launcher.java b/src/com/android/launcher3/Launcher.java
index 20ebc7a..c2c0936 100644
--- a/src/com/android/launcher3/Launcher.java
+++ b/src/com/android/launcher3/Launcher.java
@@ -78,6 +78,7 @@
 import android.view.MotionEvent;
 import android.view.View;
 import android.view.ViewGroup;
+import android.view.ViewTreeObserver;
 import android.view.accessibility.AccessibilityEvent;
 import android.view.animation.OvershootInterpolator;
 import android.widget.Toast;
@@ -125,6 +126,7 @@
 import com.android.launcher3.testing.TestProtocol;
 import com.android.launcher3.touch.AllAppsSwipeController;
 import com.android.launcher3.touch.ItemClickHandler;
+import com.android.launcher3.uioverrides.BackgroundBlurController;
 import com.android.launcher3.uioverrides.plugins.PluginManagerWrapper;
 import com.android.launcher3.userevent.nano.LauncherLogProto;
 import com.android.launcher3.userevent.nano.LauncherLogProto.Action;
@@ -328,6 +330,9 @@
     private boolean mDeferOverlayCallbacks;
     private final Runnable mDeferredOverlayCallbacks = this::checkIfOverlayStillDeferred;
 
+    private BackgroundBlurController mBackgroundBlurController =
+            new BackgroundBlurController(this);
+
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         Object traceToken = TraceHelper.INSTANCE.beginSection(ON_CREATE_EVT,
@@ -941,6 +946,7 @@
 
         NotificationListener.removeNotificationsChangedListener();
         getStateManager().moveToRestState();
+        getBackgroundBlurController().setSurfaceToLauncher(null);
 
         // Workaround for b/78520668, explicitly trim memory once UI is hidden
         onTrimMemory(TRIM_MEMORY_UI_HIDDEN);
@@ -968,6 +974,13 @@
         if (!mDeferOverlayCallbacks) {
             mOverlayManager.onActivityStarted(this);
         }
+        mDragLayer.getViewTreeObserver().addOnDrawListener(new ViewTreeObserver.OnDrawListener() {
+            @Override
+            public void onDraw() {
+                getBackgroundBlurController().setSurfaceToLauncher(mDragLayer);
+                mDragLayer.post(() -> mDragLayer.getViewTreeObserver().removeOnDrawListener(this));
+            }
+        });
 
         mAppWidgetHost.setListenIfResumed(true);
         TraceHelper.INSTANCE.endSection(traceToken);
@@ -2710,7 +2723,8 @@
     }
 
     protected StateHandler[] createStateHandlers() {
-        return new StateHandler[] { getAllAppsController(), getWorkspace() };
+        return new StateHandler[] { getAllAppsController(), getWorkspace(),
+                getBackgroundBlurController() };
     }
 
     public TouchController[] createTouchControllers() {
@@ -2739,8 +2753,12 @@
         return Stream.of(APP_INFO, WIDGETS, INSTALL);
     }
 
+    public BackgroundBlurController getBackgroundBlurController() {
+        return mBackgroundBlurController;
+    }
+
     public static Launcher getLauncher(Context context) {
-        return (Launcher) fromContext(context);
+        return fromContext(context);
     }
 
     /**