| A listener interface for receiving mouse motion events during a drag
operation.
The class that is interested in processing mouse motion events during
a drag operation either implements this interface or extends the abstract
DragSourceAdapter class (overriding only the methods of
interest).
Create a listener object using that class and then register it with
a DragSource. Whenever the mouse moves during a drag
operation initiated with this DragSource, that object's
dragMouseMoved method is invoked, and the
DragSourceDragEvent is passed to it. | 