def add_event_bubble_message(self, event, lat, lon, mark, menu):
        """
        Add an item to the popup menu.
        """
        self.itemoption = Gtk.Menu()
        itemoption = self.itemoption
        itemoption.show()
        menu.set_submenu(itemoption)
        modify = Gtk.MenuItem(label=_("Edit Family"))
        modify.show()
        modify.connect("activate", self.edit_family, event, lat, lon, mark)
        itemoption.append(modify)
        modify = Gtk.MenuItem(label=_("Edit Person"))
        modify.show()
        modify.connect("activate", self.edit_person, event, lat, lon, mark)
        itemoption.append(modify)
        modify = Gtk.MenuItem(label=_("Edit Event"))
        modify.show()
        modify.connect("activate", self.edit_event, event, lat, lon, mark)
        itemoption.append(modify)
        center = Gtk.MenuItem(label=_("Center on this place"))
        center.show()
        center.connect("activate", self.center_here, event, lat, lon, mark)
        itemoption.append(center)