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(***********************************************************************)
(* *)
(* Objective Caml *)
(* *)
(* Pierre Weis, projet Cristal, INRIA Rocquencourt *)
(* *)
(* Copyright 2001 Institut National de Recherche en Informatique et *)
(* en Automatique. All rights reserved. This file is distributed *)
(* under the terms of the Q Public License version 1.0. *)
(* *)
(***********************************************************************)
(* The toggling buttons hello world program: creates two buttons, one
simple button to quit the program, and another one with two mutually
recursive callbacks functions. Those callback functions configure the
button with a new text and simultaneously change the current call back
function of the button to reinstall the other callback.
Compile using:
ocamlc -I +labltk -c hello_quit.ml
Link using:
ocamlc -I +labltk -custom labltk.cma hello_quit.cmo -o hello_quit
Try with ./hello_quit
*)
open Camltk;;
let hello_quit () =
let main_window = openTk () in
let bouton_quit =
Button.create main_window
[Text "Quit"; Command closeTk] in
let bouton_press = Button.create main_window [] in
let rec action_press () =
Button.configure bouton_press
[Text "Hello!"; Command press_init]
and press_init () =
Button.configure bouton_press
[Text "Press"; Command action_press] in
press_init ();
pack [bouton_press; bouton_quit] [Side Side_Left];
mainLoop ();;
if !Sys.interactive then () else begin hello_quit(); exit 0 end;;
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