open Gaux
open Gtk
open Gtk_mathview
open GtkBase
open GtkMathView
open GObj

exception ErrorLoadingFile of string;;
exception ErrorWritingFile of string;;

class math_view_signals obj = object
  inherit GContainer.container_signals obj
  method clicked = GtkSignal.connect ~sgn:MathView.Signals.clicked obj ~after
  method jump = GtkSignal.connect ~sgn:MathView.Signals.jump obj ~after
  method selection_changed =
  GtkSignal.connect ~sgn:MathView.Signals.selection_changed obj ~after
end

class math_view obj = object
 inherit GContainer.container (obj : Gtk_mathview.math_view obj)
 method connect = new math_view_signals obj
 method load ~filename =
  if not (MathView.load obj ~filename) then raise (ErrorLoadingFile filename)
 method unload = MathView.unload obj
 method get_selection = MathView.get_selection obj
 method set_selection = MathView.set_selection obj
 method get_width = MathView.get_width obj
 method get_height = MathView.get_height obj
 method get_top = MathView.get_top obj
 method set_top = MathView.set_top obj
 method set_adjustments =
  fun adj1 adj2 ->
   MathView.set_adjustments obj (GData.as_adjustment adj1)
   (GData.as_adjustment adj2)
 method get_hadjustment = new GData.adjustment (MathView.get_hadjustment obj)
 method get_vadjustment = new GData.adjustment (MathView.get_vadjustment obj)
 method get_buffer = MathView.get_buffer obj
 method get_frame = new GBin.frame (MathView.get_frame obj)
 method set_font_size = MathView.set_font_size obj
 method get_font_size = MathView.get_font_size obj
 method set_anti_aliasing = MathView.set_anti_aliasing obj
 method get_anti_aliasing = MathView.get_anti_aliasing obj
 method set_kerning = MathView.set_kerning obj
 method get_kerning = MathView.get_kerning obj
 method set_log_verbosity = MathView.set_log_verbosity obj
 method get_log_verbosity = MathView.get_log_verbosity obj
 method export_to_postscript ~filename =
  if not (MathView.export_to_postscript obj ~filename) then
   raise (ErrorWritingFile filename)
end

let math_view ?adjustmenth ?adjustmentv ?(use_t1_lib=false) ?border_width
 ?width ?height ?packing ?show ()
=
 let w =
   MathView.create
    ?adjustmenth:(may_map ~f:GData.as_adjustment adjustmenth)
    ?adjustmentv:(may_map ~f:GData.as_adjustment adjustmentv)
    ?use_t1_lib
    ()
 in
  Container.set w ?border_width ?width ?height;
  pack_return (new math_view w) ~packing ~show
;;