src/adg-gtk/adg-gtk-area.h

   1 /* ADG - Automatic Drawing Generation
   2  * Copyright (C) 2007,2008,2009,2010  Nicola Fontana <ntd at entidi.it>
   3  *
   4  * This library is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU Lesser General Public
   6  * License as published by the Free Software Foundation; either
   7  * version 2 of the License, or (at your option) any later version.
   8  *
   9  * This library is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  * Lesser General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU Lesser General Public
  15  * License along with this library; if not, write to the
  16  * Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  17  * Boston, MA  02110-1301, USA.
  18  */
  19
  20
  21 #if !defined(__ADG_GTK_H__)
  22 #error "Only <adg-gtk.h> can be included directly."
  23 #endif
  24
  25
  26 #ifndef __ADG_GTK_AREA_H__
  27 #define __ADG_GTK_AREA_H__
  28
  29
  30 G_BEGIN_DECLS
  31
  32 #define ADG_GTK_TYPE_AREA             (adg_gtk_area_get_type())
  33 #define ADG_GTK_AREA(obj)             (G_TYPE_CHECK_INSTANCE_CAST((obj), ADG_GTK_TYPE_AREA, AdgGtkArea))
  34 #define ADG_GTK_AREA_CLASS(klass)     (G_TYPE_CHECK_CLASS_CAST((klass), ADG_GTK_TYPE_AREA, AdgGtkAreaClass))
  35 #define ADG_GTK_IS_AREA(obj)          (G_TYPE_CHECK_INSTANCE_TYPE((obj), ADG_GTK_TYPE_AREA))
  36 #define ADG_GTK_IS_AREA_CLASS(klass)  (G_TYPE_CHECK_CLASS_TYPE((klass), ADG_GTK_TYPE_AREA))
  37 #define ADG_GTK_AREA_GET_CLASS(obj)   (G_TYPE_INSTANCE_GET_CLASS((obj), ADG_GTK_TYPE_AREA, AdgGtkAreaClass))
  38
  39 typedef struct _AdgGtkArea        AdgGtkArea;
  40 typedef struct _AdgGtkAreaClass   AdgGtkAreaClass;
  41
  42 struct _AdgGtkArea {
  43     /*< private >*/
  44     GtkDrawingArea       parent;
  45     gpointer             data;
  46 };
  47
  48 struct _AdgGtkAreaClass {
  49     /*< private >*/
  50     GtkDrawingAreaClass  parent_class;
  51     /*< public >*/
  52     /* Virtual Table */
  53     void                (*canvas_changed)       (AdgGtkArea     *area);
  54     void                (*extents_changed)      (AdgGtkArea     *area,
  55                                                  const CpmlExtents
  56                                                                 *old_extents);
  57 };
  58
  59
  60 GType           adg_gtk_area_get_type           (void) G_GNUC_CONST;
  61
  62 GtkWidget *     adg_gtk_area_new                (void);
  63 GtkWidget *     adg_gtk_area_new_with_canvas    (AdgCanvas      *canvas);
  64 void            adg_gtk_area_set_canvas         (AdgGtkArea     *area,
  65                                                  AdgCanvas      *canvas);
  66 AdgCanvas *     adg_gtk_area_get_canvas         (AdgGtkArea     *area);
  67 const CpmlExtents *
  68                 adg_gtk_area_get_extents        (AdgGtkArea     *area);
  69 gdouble         adg_gtk_area_get_zoom           (AdgGtkArea     *area);
  70 void            adg_gtk_area_set_factor         (AdgGtkArea     *area,
  71                                                  gdouble         factor);
  72 gdouble         adg_gtk_area_get_factor         (AdgGtkArea     *area);
  73 void            adg_gtk_area_switch_autozoom    (AdgGtkArea     *area,
  74                                                  gboolean        state);
  75 gboolean        adg_gtk_area_has_autozoom       (AdgGtkArea     *area);
  76 void            adg_gtk_area_canvas_changed     (AdgGtkArea     *area,
  77                                                  AdgCanvas      *old_canvas);
  78 void            adg_gtk_area_extents_changed    (AdgGtkArea     *area,
  79                                                  const CpmlExtents
  80                                                                 *old_extents);
  81
  82 G_END_DECLS
  83
  84
  85 #endif /* __ADG_GTK_AREA_H__ */