public void AddTouchListener(ITouchInputListener listener)
 {
     Debug.Assert(!touchListeners.Contains(listener));
     touchListeners.Add(listener);
 }
 public TouchInputProcessor(ITouchInputListener inputListener)
 {
     _inputListener = inputListener;
 }
 public void AddTouchListener(ITouchInputListener listener)
 {
     Debug.Assert(!touchListeners.Contains(listener));
     touchListeners.Add(listener);
 }