question: public void mousePressed ( MouseEvent e ) { VisualizationViewer < ? , ? > vv = ( VisualizationViewer < ? , ? > ) e . getSource ( ) ; boolean accepted = checkModifiers ( e ) ; down = e . getPoint ( ) ; if ( accepted ) { vv . setCursor ( cursor ) ; } }
target:  Check the event modifiers. Set the 'down' point for later use. If this event satisfies the modifiers, change the cursor to the system 'move cursor'