Hi Jeyron,
here is a simple example which shows how the callback for the menu might
open a new window (a dialog in this case).
#lang racket/gui
(define main-window (new frame% [label "Example"] [width 100] [height 100]))
(define menu-bar (new menu-bar% [parent main-window]))
;; Callback for the "Add" menu item. receives the menu item and the event
;; that triggered the menu
(define (on-add-volunteer menu-item event)
(define dialog (new dialog% [label "Add Dialog"] [parent main-window]))
(define button (new button%
[label "Close"]
[parent dialog]
[callback (lambda (button event)
(send dialog show #f))]))
(send dialog show #t))
(define menu-volunteers
(new menu%
(label "&Volunteers")
(parent menu-bar)))
(define menu-item-add
(new menu-item%
(label "&Add")
(parent menu-volunteers)
(callback on-add-volunteer)))
(send main-window show #t)
Best Regards,
Alex.
On Friday, October 12, 2018 at 10:16:40 AM UTC+8, Jeyron A.C wrote:
>
>
> Ok I understand that part of wanting to close the windows. And the truth
> is that I do not need to complicate myself so much.
>
> Even so I have another doubt, and it is like using the menu bar in a
> simple and useful way.
>
> I have my code:
>
> (define menu-volunteers
> (new menu%
> [label "& Volunteers"]
> [parent menu-bar]))
>
>
> (define my_item_agregar_volun
> (new menu-item%
> [label "& Add"]
> [parent menu-volunteers]
> "Here goes the callback"
> ))
>
> Exactly where the callback goes, is where I have that big doubt. That has
> to go in that section.
>
> The idea is to call a new window where you can add data, which are
> necessary.
>
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