(*************************************************************************)
(*                                                                       *)
(*                Objective Caml LablTk library                          *)
(*                                                                       *)
(*            Jacques Garrigue, Kyoto University RIMS                    *)
(*                                                                       *)
(*   Copyright 1999 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.                                             *)
(*                                                                       *)
(*************************************************************************)

(* $Id$ *)

open Tk
open Jg_tk

(*
class formatted :parent :width :maxheight :minheight =
  val parent = (parent : Widget.any Widget.widget)
  val width = width
  val maxheight = maxheight
  val minheight = minheight
  val tw = Text.create :parent :width wrap:`Word
  val fof = Format.get_formatter_output_functions ()
  method parent = parent
  method init =
    pack [tw] side:`Left fill:`Both expand:true;
    Format.print_flush ();
    Format.set_margin (width - 2);
    Format.set_formatter_output_functions out:(Jg_text.output tw)
      flush:(fun () -> ())
  method finish =
    Format.print_flush ();
    Format.set_formatter_output_functions out:(fst fof) flush:(snd fof);
    let `Linechar (l, _) = Text.index tw index:(tposend 1) in
    Text.configure tw height:(max minheight (min l maxheight));
    if l > 5 then
    pack [Jg_text.add_scrollbar tw] before:tw side:`Right fill:`Y
end
*)

let formatted :title ?:on ?(:width=60) ?(:maxheight=10) ?(:minheight=0) () =
  let tl, frame =
    match on with
      Some frame -> coe frame, frame
    | None ->
        let tl = Jg_toplevel.titled title in
        Jg_bind.escape_destroy tl;
        let frame = Frame.create tl in
        pack [frame] side:`Top fill:`Both expand:true;
        coe tl, frame
  in
  let tw = Text.create frame :width wrap:`Word  in
  pack [tw] side:`Left fill:`Both expand:true;
  Format.print_flush ();
  Format.set_margin (width - 2);
  let fof,fff = Format.get_formatter_output_functions () in
  Format.set_formatter_output_functions
    out:(Jg_text.output tw) flush:(fun () -> ());
  tl, tw,
  begin fun () ->
    Format.print_flush ();
    Format.set_formatter_output_functions out:fof flush:fff;
    let `Linechar (l, _) = Text.index tw index:(tposend 1) in
    Text.configure tw height:(max minheight (min l maxheight));
    if l > 5 then
    pack [Jg_text.add_scrollbar tw] before:tw side:`Right fill:`Y
  end

let ask :title ?:master text =
  let tl = Jg_toplevel.titled title in
  begin match master with None -> ()
  | Some master -> Wm.transient_set tl :master
  end;
  let mw = Message.create tl :text padx:20 pady:10
           width:250 justify:`Left aspect:400 anchor:`W
  and fw = Frame.create tl
  and sync = Textvariable.create on:tl ()
  and r = ref (`cancel : [`yes|`no|`cancel]) in
  let accept = Button.create fw text:"Yes"
      command:(fun () -> r := `yes; destroy tl) 
  and refuse = Button.create fw text:"No"
      command:(fun () -> r := `no; destroy tl)
  and cancel = Jg_button.create_destroyer tl parent:fw text:"Cancel"
  in
  bind tl events:[`Destroy] extend:true
    action:(fun _ -> Textvariable.set sync to:"1");
  pack [accept; refuse; cancel] side:`Left fill:`X expand:true;
  pack [mw] side:`Top fill:`Both;
  pack [fw] side:`Bottom fill:`X expand:true;
  Grab.set tl;
  Tkwait.variable sync;
  !r