menu-bar% : class?

superclass: object%

extends:  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 parent]      [ [demand-callback demand-callback]])

→ (is-a?/c menu-bar%)

parent : (or/c (is-a?/c frame%) (one-of/c 'root))

demand-callback   :   ((is-a?/c menu-bar%) . -> . any)       =   (lambda (m) (void))

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.

(send a-menu-bar enable enable?) → void?

enable? : any/c

Enables or disables the menu bar (i.e., all of its menus). Each menu’s is-enabled? method returns #f only if the menu is specifically disabled (in addition to the menu bar).

(send a-menu-bar get-frame) → (is-a?/c frame%)

Returns the menu bar’s frame.

(send a-menu-bar is-enabled?) → boolean?

Returns #t if the menu bar is enabled, #f otherwise.