* #31377: added visual feedback for incall buttons (1)
diff --git a/src/org/sflphone/model/Bubble.java b/src/org/sflphone/model/Bubble.java
index ad534dd..63b7d83 100644
--- a/src/org/sflphone/model/Bubble.java
+++ b/src/org/sflphone/model/Bubble.java
@@ -13,6 +13,7 @@
 import android.graphics.PointF;
 import android.graphics.RectF;
 import android.graphics.Shader;
+import android.view.MotionEvent;
 
 public abstract class Bubble {
 
@@ -223,7 +224,7 @@
             bounds.set(f, y, g, h);
         }
 
-        public abstract void generateBitmap();
+        public abstract void generateBitmap(int action);
 
         public RectF getDrawerBounds() {
             return bounds;
@@ -269,4 +270,6 @@
         return false;
     }
 
+    public abstract boolean onDown(MotionEvent event);
+
 }