(* Copyright (C) 2004-2005, 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/
 *)

  (** multi selection gtkMathView which handle mactions and hyperlinks. Mactions
  * are handled internally. Hyperlinks are handled by calling an user provided
  * callback *)
class type clickableMathView =
  object
    inherit GMathViewAux.multi_selection_math_view

      (** set hyperlink callback. None disable hyperlink handling *)
    method set_href_callback: (string -> unit) option -> unit
    
    method string_of_selected_terms: string

    method update_font_size: unit
  end

class type sequentViewer =
  object
    inherit clickableMathView

(*       |+* @return the list of selected terms. Selections which are not terms are
      * ignored +|
    method get_selected_terms: Cic.term list

      |+* @return the list of selected hypothese. Selections which are not
      * hypotheses are ignored +|
    method get_selected_hypotheses: Cic.hypothesis list *)

      (** load a sequent and render it into parent widget *)
    method load_sequent: Cic.metasenv -> int -> unit
  end

class type sequentsViewer =
  object
    method reset: unit
    method load_sequents: ProofEngineTypes.status -> unit
    method goto_sequent: int -> unit  (* to be called _after_ load_sequents *)
  end

class type cicBrowser =
object
  method load: MatitaTypes.mathViewer_entry -> unit
  (* method loadList: string list -> MatitaTypes.mathViewer_entry -> unit *)
  method loadInput: string -> unit
end

(** {2 Constructors} *)

  (** meta constructor *)
type 'widget constructor =
  ?hadjustment:GData.adjustment ->
  ?vadjustment:GData.adjustment ->
  ?font_size:int ->
  ?log_verbosity:int ->
  ?width:int ->
  ?height:int ->
  ?packing:(GObj.widget -> unit) ->
  ?show:bool ->
  unit ->
    'widget

val clickableMathView:  clickableMathView constructor

val sequentViewer:       sequentViewer constructor

val sequentsViewer:
  notebook:GPack.notebook ->
  sequentViewer:sequentViewer ->
  unit ->
    sequentsViewer

val cicBrowser: unit -> cicBrowser

(** mathview wide functions *)

val increase_font_size: unit -> unit
val decrease_font_size: unit -> unit
val reset_font_size: unit -> unit

val refresh_all_browsers: unit -> unit  (** act on all cicBrowsers *)
val update_font_sizes: unit -> unit

(** {2 singleton instances} *)

val sequentViewer_instance: unit -> sequentViewer
val sequentsViewer_instance: unit -> sequentsViewer

val mathViewer: unit -> MatitaTypes.mathViewer