question: private void popupMenu ( MouseEvent e ) { if ( contextMenu != null && e . isPopupTrigger ( ) ) { int modelIndex = indexToModel ( table . getSelectedRow ( ) ) ; if ( modelIndex != - 1 ) { T entry = data . get ( modelIndex ) ; contextMenu . showMenu ( entry , table , e . getX ( ) , e . getY ( ) ) ; } } }
target:  Opens the context menu if this MouseEvent was a popup trigger and a menu is set.