gtk:application-window-show-menubar (object)

window -- a gtk:application-window widget
show -- a boolean whether to show a menubar when needed

Accessor of the show-menubar slot of the gtk:application-window class. The gtk:application-window-show-menubar function returns whether the window will display a menubar for the application menu and menubar as needed. The (setf gtk:application-window-show-menubar) function sets whether the window will display a menubar.