def create_menu_bar(self, parent, controller=None):
""" Creates a menu bar representation of the manager. """
# If a controller is required it can either be set as a trait on the
# menu bar manager (the trait is part of the 'ActionManager' API), or
# passed in here (if one is passed in here it takes precedence over the
# trait).
if controller is None:
controller = self.controller
# Create the menu bar.
menu_bar = MenuBar(parent)
# Every item in every group must be a menu manager.
for group in self.groups:
for item in group.items:
menu = item.create_menu(parent, controller)
menu.menuAction().setText(item.name)
menu_bar.addMenu(menu)
return menu_bar
