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.