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;;
;; Simple example, ported from the one in Gtk+2.0 tutorial.
;;
;; Difference from C version: Scheme version's signal callback
;; doesn't take extra "user data": you can use closure if you need
;; extra data. With the same reason, there's no 'g-signal-connect-swapped'.
;;
;; $Id: helloworld.scm,v 1.2 2007/01/13 01:36:30 maruska Exp $
(use gtk)
(define (hello w)
(format #t "Hello world (~s)\n" w))
(define (destroy w)
(format #t "Destroying ~s\n" w)
(gtk-main-quit))
(define (main args)
(gtk-init args)
(let1 window (gtk-window-new GTK_WINDOW_TOPLEVEL)
(g-signal-connect window "destroy" destroy)
(gtk-container-set-border-width window 10)
(let1 button (gtk-button-new-with-label "Hello world")
(g-signal-connect button "clicked" hello)
(g-signal-connect button "clicked" (lambda _ (destroy window)))
(gtk-container-add window button)
(gtk-widget-show button)
(gtk-widget-show window)
))
(gtk-main)
0)
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