(* Copyright (C) 2004, HELM Team.
 * 
 * This file is part of HELM, an Hypertextual, Electronic
 * Library of Mathematics, developed at the Computer Science
 * Department, University of Bologna, Italy.
 * 
 * HELM is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 * 
 * HELM is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with HELM; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston,
 * MA  02111-1307, USA.
 * 
 * For details, see the HELM World-Wide-Web page,
 * http://helm.cs.unibo.it/
 *)

let toggle_visibility ~(win: GWindow.window) ~(check: GMenu.check_menu_item) =
  ignore (check#connect#toggled (fun _ ->
    if check#active then win#show () else win#misc#hide ()));
  ignore (win#event#connect#delete (fun _ ->
    win#misc#hide ();
    check#set_active false;
    true))

let toggle_win ?(check: GMenu.check_menu_item option) (win: GWindow.window) () =
  if win#is_active then win#misc#hide () else win#show ();
  match check with
  | None -> ()
  | Some check -> check#set_active (not check#active)

let add_key_binding key callback (evbox: GBin.event_box) =
  ignore (evbox#event#connect#key_press (function
    | key' when GdkEvent.Key.keyval key' = key ->
        callback ();
        false
    | _ -> false))

class stringListModel (tree_view: GTree.view) =
  let column_list = new GTree.column_list in
  let text_column = column_list#add Gobject.Data.string in
  let list_store = GTree.list_store column_list in
  object (self)

    initializer
      let renderer = (GTree.cell_renderer_text [], ["text", text_column]) in
      let view_column = GTree.view_column ~renderer () in
      tree_view#set_model (Some (list_store :> GTree.model));
      ignore (tree_view#append_column view_column)

    method list_store = list_store

    method easy_append s =
      let tree_iter = list_store#append () in
      list_store#set ~row:tree_iter ~column:text_column s

    method easy_insert pos s =
      let tree_iter = list_store#insert pos in
      list_store#set ~row:tree_iter ~column:text_column s

    method easy_selection () =
      List.map
        (fun tree_path ->
          let iter = list_store#get_iter tree_path in
          list_store#get ~row:iter ~column:text_column)
        tree_view#selection#get_selected_rows

  end