GTK+ 自定义图标函数

#define NUM_PIXBUF 6
void register_stock_icons (void)
{
  static gboolean registered = FALSE;
 
  if (!registered)
    {
      gint i;
      GdkPixbuf *pixbuf[NUM_PIXBUF];
      GtkIconFactory *factory[NUM_PIXBUF];

      static GtkStockItem items[] =
      {
        { "demo_3d",    "3D",   0, 0, NULL },
        { "demo_top",   "TOP",  0, 0, NULL },
        { "demo_left",  "LEFT", 0, 0, NULL },
        { "demo_front", "FRONT",0, 0, NULL },
        { "demo_run",   "RUN",  0, 0, NULL },
        { "demo_show",  "SHOW", 0, 0, NULL }
      };
     
      registered = TRUE;

      /* Register our stock items */
      gtk_stock_add (items, G_N_ELEMENTS (items));

      for(i=0;i<NUM_PIXBUF;i++)
      {
         /* Add our custom icon factory to the list of defaults */
         factory[i] = gtk_icon_factory_new ();
         gtk_icon_factory_add_default (factory[i]);  
         //
         pixbuf[i] = NULL;                  
      }
         
      pixbuf[0] = gdk_pixbuf_new_from_file ("./image/3D.png",    NULL);
      pixbuf[1] = gdk_pixbuf_new_from_file ("./image/top.png",   NULL);
      pixbuf[2] = gdk_pixbuf_new_from_file ("./image/left.png",  NULL);
      pixbuf[3] = gdk_pixbuf_new_from_file ("./image/front.png", NULL);
      pixbuf[4] = gdk_pixbuf_new_from_file ("./image/run.png",   NULL);
      pixbuf[5] = gdk_pixbuf_new_from_file ("./image/show.png",  NULL);

      /* Register icon to accompany stock item */
      GtkIconSet *icon_set[NUM_PIXBUF];
      GdkPixbuf  *transparent[NUM_PIXBUF];
      for(i=0;i<NUM_PIXBUF;i++)
      {
           if (pixbuf[i] != NULL)
            {
              /* The gtk-logo-rgb icon has a white background, make it transparent */
              transparent[i] = gdk_pixbuf_add_alpha (pixbuf[i], TRUE, 0xff, 0xff, 0xff);
              icon_set[i]    = gtk_icon_set_new_from_pixbuf (transparent[i]);
              switch(i)
              {
                  case 0 :
                       gtk_icon_factory_add (factory[i], "demo_3d",    icon_set[i]);
                       break; 
                  case 1 :
                       gtk_icon_factory_add (factory[i], "demo_top",   icon_set[i]);
                       break;     
                  case 2 :
                       gtk_icon_factory_add (factory[i], "demo_left",  icon_set[i]);
                       break; 
                  case 3 :
                       gtk_icon_factory_add (factory[i], "demo_front", icon_set[i]);
                       break; 
                  case 4 :
                       gtk_icon_factory_add (factory[i], "demo_run",   icon_set[i]);
                       break;
                  case 5 :
                       gtk_icon_factory_add (factory[i], "demo_show",  icon_set[i]);
                       break;                    
              }
             
              gtk_icon_set_unref (icon_set[i]);
              g_object_unref (pixbuf[i]);
              g_object_unref (transparent[i]);
            }
          else
            g_warning ("failed to load GTK logo for toolbar");
         
          /* Drop our reference to the factory, GTK will hold a reference. */
          g_object_unref (factory[i]);
      }         
    }
}

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