(* 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/
 *)

class type proof_viewer =
  object
    inherit GMathViewAux.single_selection_math_view

    method load_proof: StatefulProofEngine.proof_status -> unit
  end

class type sequent_viewer =
  object
    inherit GMathViewAux.multi_selection_math_view

      (** @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 sequents_viewer =
  object
    method reset: unit
    method load_sequents: Cic.metasenv -> unit
    method goto_sequent: int -> unit  (* to be called _after_ load_sequents *)
  end

val proof_viewer:
  ?hadjustment:GData.adjustment ->
  ?vadjustment:GData.adjustment ->
  ?font_size:int ->
  ?log_verbosity:int ->
  ?width:int ->
  ?height:int ->
  ?packing:(GObj.widget -> unit) ->
  ?show:bool ->
  unit ->
    proof_viewer

  (** singleton proof_viewer instance.
  * Uses singleton GUI instance *)
val proof_viewer_instance: unit -> proof_viewer

val sequent_viewer:
  ?hadjustment:GData.adjustment ->
  ?vadjustment:GData.adjustment ->
  ?font_size:int ->
  ?log_verbosity:int ->
  ?width:int ->
  ?height:int ->
  ?packing:(GObj.widget -> unit) ->
  ?show:bool ->
  unit ->
    sequent_viewer

val sequents_viewer:
  notebook:GPack.notebook ->
  sequent_viewer:sequent_viewer ->
  set_goal:(int -> unit) ->
  unit ->
    sequents_viewer

val mathViewer: unit -> MatitaTypes.mathViewer