question: public void mousePressed ( MouseEvent e ) { events . clear ( ) ; if ( mapDragOperationFromModifiers ( e ) != DnDConstants . ACTION_NONE ) { try { motionThreshold = DragSource . getDragThreshold ( ) ; } catch ( Exception exc ) { motionThreshold = 5 ; } appendEvent ( e ) ; } }
target:  Invoked when a mouse button has been pressed on a component.