1 files changed, 28 insertions, 0 deletions

diff --git a/src/com/android/launcher3/LauncherRootView.java b/src/com/android/launcher3/LauncherRootView.java
index fc4de2d32..b1273b64c 100644
--- a/src/com/android/launcher3/LauncherRootView.java
+++ b/src/com/android/launcher3/LauncherRootView.java
@@ -29,6 +29,7 @@ public class LauncherRootView extends InsettableFrameLayout {
     private int mRightInsetBarWidth;
 
     private View mAlignedView;
+    private WindowStateListener mWindowStateListener;
 
     public LauncherRootView(Context context, AttributeSet attrs) {
         super(context, attrs);
@@ -117,4 +118,31 @@ public class LauncherRootView extends InsettableFrameLayout {
             }
         }
     }
+
+    public void setWindowStateListener(WindowStateListener listener) {
+        mWindowStateListener = listener;
+    }
+
+    @Override
+    public void onWindowFocusChanged(boolean hasWindowFocus) {
+        super.onWindowFocusChanged(hasWindowFocus);
+        if (mWindowStateListener != null) {
+            mWindowStateListener.onWindowFocusChanged(hasWindowFocus);
+        }
+    }
+
+    @Override
+    protected void onWindowVisibilityChanged(int visibility) {
+        super.onWindowVisibilityChanged(visibility);
+        if (mWindowStateListener != null) {
+            mWindowStateListener.onWindowVisibilityChanged(visibility);
+        }
+    }
+
+    public interface WindowStateListener {
+
+        void onWindowFocusChanged(boolean hasFocus);
+
+        void onWindowVisibilityChanged(int visibility);
+    }
 }
\ No newline at end of file