3.30  menu-bar%

Implements: menu-item-container<%>

A menu-bar% object is created for a particular frame% object. A frame can have at most one menu bar; an exn:fail:contract exception is raised when a new menu bar is created for a frame that already has a menu bar.

• (new menu-bar% (parent _) [(demand-callback _)]) -> menu-bar% object
     parent : frame% object or 'root
   demand-callback = void : procedure of one argument: a menu-bar% object

  Creates a menu bar in the specified frame. The menu bar is initially empty. If 'root is supplied as parent, the menu bar becomes active only when no other frames are shown. A 'root parent is allowed only when current-eventspace-has-menu-root? returns #t, and only if no such menu bar has been created before, otherwise an exn:fail:contract exception is raised.

  The demand-callback procedure is called by the default on-demand method with the object itself.

  
  

Methods
    enable
    get-frame
    is-enabled?

All Methods
    enable from menu-bar%
    get-frame from menu-bar%
    get-items from menu-item-container<%>
    is-enabled? from menu-bar%
    on-demand from menu-item-container<%>