GObjectDEFINE_TYPE_EXTENDED

G_DEFINE_TYPE_EXTENDED (GtkGadget,
                        gtk_gadget,
                        GTK_TYPE_WIDGET,
                        0,
                        G_ADD_PRIVATE (GtkGadget)
                        G_IMPLEMENT_INTERFACE (TYPE_GIZMO,
                                               gtk_gadget_gizmo_init));

static void     gtk_gadget_init       (GtkGadget      *self);
static void     gtk_gadget_class_init (GtkGadgetClass *klass);
static gpointer gtk_gadget_parent_class = NULL;
static gint     GtkGadget_private_offset;
static void     gtk_gadget_class_intern_init (gpointer klass)
{
  gtk_gadget_parent_class = g_type_class_peek_parent (klass);
  if (GtkGadget_private_offset != 0)
    g_type_class_adjust_private_offset (klass, &GtkGadget_private_offset);
  gtk_gadget_class_init ((GtkGadgetClass*) klass);
}
static inline gpointer gtk_gadget_get_instance_private (GtkGadget *self)
{
  return (G_STRUCT_MEMBER_P (self, GtkGadget_private_offset));
}

GType
gtk_gadget_get_type (void)
{
  static GType static_g_define_type_id = 0;
  if (g_once_init_enter_pointer (&static_g_define_type_id))
    {
      GType g_define_type_id =
        g_type_register_static_simple (GTK_TYPE_WIDGET,
                                       g_intern_static_string ("GtkGadget"),
                                       sizeof (GtkGadgetClass),
                                       (GClassInitFunc) gtk_gadget_class_intern_init,
                                       sizeof (GtkGadget),
                                       (GInstanceInitFunc) gtk_gadget_init,
                                       0);
      {
        GtkGadget_private_offset =
          g_type_add_instance_private (g_define_type_id, sizeof (GtkGadgetPrivate));
      }
      {
        const GInterfaceInfo g_implement_interface_info = {
          (GInterfaceInitFunc) gtk_gadget_gizmo_init
        };
        g_type_add_interface_static (g_define_type_id, TYPE_GIZMO, &g_implement_interface_info);
      }
      g_once_init_leave_pointer (&static_g_define_type_id, g_define_type_id);
    }
  return static_g_define_type_id;
}