10 BOOL _isDraggingImage;
12 CGSize _draggingOffset
17 unsigned _implementedDraggingSourceMethods;
19 CGPoint _draggingLocation;
20 id _draggingDestination;
21 BOOL _draggingDestinationWantsPeriodicUpdates;
23 CGPoint _startDragLocation;
24 BOOL _shouldSlideBack;
25 unsigned _dragOperation;
A timer object that can send a message after the given time interval.