(***********************************************************************)

(*                                                                     *)

(*                 MLTk, Tcl/Tk interface of OCaml                     *)

(*                                                                     *)

(*    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 OCaml source tree.          *)

(*                                                                     *)

(***********************************************************************)

open Camltk

let _ =

  let top_w = opentk () in

  let text0_w = Text.create top_w [] in

  let entry0_w = Entry.create top_w [] in

  let button0_w = Button.create top_w

                    [Text "Quit"; Command (fun _ -> exit 0)] in

  let buffer = String.create 256 in

  let master_socket = Unix.socket Unix.PF_INET Unix.SOCK_STREAM 0 in

  Unix.bind master_socket (Unix.ADDR_INET(Unix.inet_addr_any, 6789));

  Unix.listen master_socket 3;

  print_string "Please connect to port 6789..."; print_newline();

  let (sock, _) = Unix.accept master_socket in

  Fileevent.add_fileinput sock

    (fun _ ->

      let n = Unix.recv sock 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 ;

    Unix.send sock txt 0 (String.length txt) [];

    () in

  bind entry0_w [([], KeyPressDetail "Return")] (BindSet ([], send));

  pack [text0_w; entry0_w; button0_w][Side Side_Top; Fill Fill_X; Expand true];

  mainLoop ()