Fix issue #2170897: wallpaper touch-up event not seen when exiting lock screen

Make sure to deliver events to the wallpaper until the final up.

Also fix behavior in the case where a window goes away while the pointer is still
down in it, which is a fairly novel situation introduced by the new lock screen.

Also add infrastructure for delivering motion events during preview.

Change-Id: I0de7979be27e00caf0b1eff794ea899a815142f6

2 files changed, 10 insertions, 0 deletions

diff --git a/core/java/android/service/wallpaper/IWallpaperEngine.aidl b/core/java/android/service/wallpaper/IWallpaperEngine.aidl
index bbd9dde..37e6133 100644
--- a/core/java/android/service/wallpaper/IWallpaperEngine.aidl
+++ b/core/java/android/service/wallpaper/IWallpaperEngine.aidl
@@ -16,11 +16,14 @@
 
 package android.service.wallpaper;
 
+import android.view.MotionEvent;
+
 /**
  * @hide
  */
 oneway interface IWallpaperEngine {
     void setDesiredSize(int width, int height);
     void setVisibility(boolean visible);
+    void dispatchPointer(in MotionEvent event);
 	void destroy();
 }
diff --git a/core/java/android/service/wallpaper/WallpaperService.java b/core/java/android/service/wallpaper/WallpaperService.java
index e79832b..b29d837 100644
--- a/core/java/android/service/wallpaper/WallpaperService.java
+++ b/core/java/android/service/wallpaper/WallpaperService.java
@@ -746,6 +746,12 @@ public abstract class WallpaperService extends Service {
             mCaller.sendMessage(msg);
         }
 
+        public void dispatchPointer(MotionEvent event) {
+            if (mEngine != null) {
+                mEngine.mWindow.onDispatchPointer(event, event.getEventTime(), false);
+            }
+        }
+        
         public void destroy() {
             Message msg = mCaller.obtainMessage(DO_DETACH);
             mCaller.sendMessage(msg);
@@ -805,6 +811,7 @@ public abstract class WallpaperService extends Service {
                             mEngine.mPendingMove = null;
                         }
                     }
+                    if (DEBUG) Log.v(TAG, "Delivering touch event: " + ev);
                     mEngine.onTouchEvent(ev);
                     ev.recycle();
                 } break;