lib/diainteractiverenderer.c

   1 /* Dia -- an diagram creation/manipulation program
   2  * Copyright (C) 1998 Alexander Larsson
   3  *
   4  * diainteractiverenderer.c - interface definition, implementation
   5  *                            live in app
   6  * Copyright (C) 2002 Hans Breuer (refactoring)
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License as published by
  10  * the Free Software Foundation; either version 2 of the License, or
  11  * (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with this program; if not, write to the Free Software
  20  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  21  */
  22
  23 #include "diarenderer.h"
  24
  25 static void
  26 dia_interactive_renderer_iface_init (DiaInteractiveRendererInterface *iface)
  27 {
  28   /* NULL initialization probably already done by GObject */
  29   iface->clip_region_clear = NULL;
  30   iface->clip_region_add_rect = NULL;
  31   iface->draw_pixel_line = NULL;
  32   iface->draw_pixel_rect = NULL;
  33   iface->fill_pixel_rect = NULL;
  34   iface->copy_to_window = NULL;
  35   iface->set_size = NULL;
  36 }
  37
  38 GType
  39 dia_interactive_renderer_interface_get_type (void)
  40 {
  41   static GType iface_type = 0;
  42
  43   if (!iface_type)
  44     {
  45       static const GTypeInfo iface_info =
  46       {
  47         sizeof (DiaInteractiveRendererInterface),
  48         (GBaseInitFunc)     dia_interactive_renderer_iface_init,
  49         (GBaseFinalizeFunc) NULL,
  50       };
  51
  52       iface_type = g_type_register_static (G_TYPE_INTERFACE,
  53                                            "DiaInteractiveRendererInterface",
  54                                            &iface_info,
  55                                            0);
  56
  57       g_type_interface_add_prerequisite (iface_type,
  58                                          DIA_TYPE_RENDERER);
  59     }
  60
  61   return iface_type;
  62 }
  63
  64 /*
  65  * Wrapper functions using the above
  66  */
  67 void
  68 dia_renderer_set_size (DiaRenderer* renderer, gpointer window,
  69                        int width, int height)
  70 {
  71   DiaInteractiveRendererInterface *irenderer =
  72     DIA_GET_INTERACTIVE_RENDERER_INTERFACE (renderer);
  73
  74   g_return_if_fail (irenderer != NULL);
  75   g_return_if_fail (irenderer->set_size != NULL);
  76
  77   irenderer->set_size (renderer, window, width, height);
  78 }
  79