Remove back button when on home screen

Add OverviewInteractionState to handle setting OverviewInteractionFlags.

Hide back button when in NORMAL state and launcher's window is focused.
Show it when in other states or when launcher's window loses focus.

Change-Id: I35919561b9972789e995f1cc434c23e2afe9e77c

1 files changed, 8 insertions, 3 deletions

diff --git a/quickstep/src/com/android/launcher3/uioverrides/UiFactory.java b/quickstep/src/com/android/launcher3/uioverrides/UiFactory.java
index b4f40c215..92b38fe01 100644
--- a/quickstep/src/com/android/launcher3/uioverrides/UiFactory.java
+++ b/quickstep/src/com/android/launcher3/uioverrides/UiFactory.java
@@ -16,12 +16,11 @@
 
 package com.android.launcher3.uioverrides;
 
-import android.content.pm.PackageManager;
+import static com.android.launcher3.LauncherState.NORMAL;
+
 import android.graphics.Bitmap;
 import android.graphics.Canvas;
 import android.graphics.PointF;
-import android.os.Bundle;
-import android.view.View;
 import android.view.View.AccessibilityDelegate;
 
 import com.android.launcher3.Launcher;
@@ -29,6 +28,7 @@ import com.android.launcher3.LauncherStateManager.StateHandler;
 import com.android.launcher3.config.FeatureFlags;
 import com.android.launcher3.graphics.BitmapRenderer;
 import com.android.launcher3.util.TouchController;
+import com.android.quickstep.OverviewInteractionState;
 import com.android.quickstep.RecentsView;
 import com.android.systemui.shared.recents.view.RecentsTransition;
 
@@ -68,6 +68,11 @@ public class UiFactory {
         OptionsPopupView.show(launcher, touchPoint.x, touchPoint.y);
     }
 
+    public static void onLauncherStateOrFocusChanged(Launcher launcher) {
+        OverviewInteractionState.setBackButtonVisible(launcher, !launcher.isInState(NORMAL)
+                || !launcher.hasWindowFocus());
+    }
+
     public static Bitmap createFromRenderer(int width, int height, boolean forceSoftwareRenderer,
             BitmapRenderer renderer) {
         if (USE_HARDWARE_BITMAP && !forceSoftwareRenderer) {