Avoid PanGesture circular buffer overflow

[problem]     ScrollView sometimes moves in the wrong direction.
[cause]       Motion events received in excess of PanGesture PAN_GESTURE_HISTORY limit,
before the update-thread can process in the correct order.
[solution]    Increase PAN_GESTURE_HISTORY value.

diff --git a/dali/internal/update/gestures/scene-graph-pan-gesture.h b/dali/internal/update/gestures/scene-graph-pan-gesture.h
index 25ea13b..b2bf1ae 100644 (file)
--- a/dali/internal/update/gestures/scene-graph-pan-gesture.h
+++ b/dali/internal/update/gestures/scene-graph-pan-gesture.h
@@ -167,7 +167,7 @@ public:
   typedef PanInfoHistory::const_iterator PanInfoHistoryConstIter;
 
 private:
-  static const unsigned int PAN_GESTURE_HISTORY = 4u;
+  static const unsigned int PAN_GESTURE_HISTORY = 20u;
 
 public: