A DESCRIPTION OF THE REQUEST :
Since Jmenu can contain any component, e.g. JCheckBoxMenuItem, we need the ability to tick more than checkbox before the JPopupMenu disappear. In another word the mouse listener should not be activated in user clicking on the JPopupMenu area.

  Suggested method:
JPopupMenu .setSelectionModel(MultiSelectionModel model)

JUSTIFICATION :
Expand the usability of Jmenu