(gobject:define-genum "GtkMenuDirectionType" menu-direction-type
  (:export t
   :type-initializer "gtk_menu_direction_type_get_type")
  (:parent 0)
  (:child 1)
  (:next 2)
  (:prev 3))  

:parent

Movement to the parent menu shell.

:child

Movement to the submenu, if any, associated with the item.

:next

Movement to the next menu item.

:prev

Movement to the previous menu item.