ocaml/otherlibs/labltk/examples_camltk/fileinput.ml

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(***********************************************************************)
(* *)
(* MLTk, Tcl/Tk interface of Objective Caml *)
(* *)
(* Francois Rouaix, Francois Pessaux, Jun Furuse and Pierre Weis *)
(* projet Cristal, INRIA Rocquencourt *)
(* Jacques Garrigue, Kyoto University RIMS *)
(* *)
(* Copyright 2002 Institut National de Recherche en Informatique et *)
(* en Automatique and Kyoto University. All rights reserved. *)
(* This file is distributed under the terms of the GNU Library *)
(* General Public License, with the special exception on linking *)
(* described in file LICENSE found in the Objective Caml source tree. *)
(* *)
(***********************************************************************)
open Camltk ;;
let top_w = opentk () ;;
let buffer = String.create 256 ;;
let (fd_in, fd_out) = Unix.pipe () ;;
let text0_w = Text.create top_w [] ;;
let entry0_w = Entry.create top_w [] ;;
let button0_w = Button.create top_w [Text "Quit"; Command (fun _ -> exit 0)] ;;
Fileevent.add_fileinput fd_in (fun _ ->
let n = Unix.read fd_in buffer 0 (String.length buffer) in
let txt = String.sub buffer 0 n in
Text.insert text0_w (TextIndex (End, [])) txt []) ;;
let send _ =
let txt = Entry.get entry0_w ^ "\n" in
Entry.delete_range entry0_w (At 0) End ;
ignore (Unix.write fd_out txt 0 (String.length txt));;
bind entry0_w [([], KeyPressDetail "Return")] (BindSet ([], send)) ;
pack [text0_w; entry0_w; button0_w][Side Side_Top; Fill Fill_X; Expand true] ;;
mainLoop () ;;