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/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
/*
* Copyright (C) 2000 CodeFactory AB
* Copyright (C) 2000 Richard Hult <rhult@codefactory.se>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of the
* License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public
* License along with this program; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*
* Author: Richard Hult
*/
#ifndef __TYPE_UTILS_H__
#define __TYPE_UTILS_H__
#include <glib.h>
#include <gtk/gtkobject.h>
#include <gtk/gtktypeutils.h>
/* Define the boilerplate type stuff to reduce typos and code size. Defines
* the get_type method and the parent_class static variable. */
#define GNOME_CLASS_BOILERPLATE(type, type_as_function, \
parent_type, parent_type_as_function) \
static parent_type ## Class *parent_class = NULL; \
GtkType \
type_as_function ## _get_type (void) \
{ \
static GtkType object_type = 0; \
if (object_type == 0) { \
GtkType type_of_parent; \
static const GtkTypeInfo object_info = { \
#type, \
sizeof (type), \
sizeof (type ## Class), \
(GtkClassInitFunc) type_as_function ## _class_init, \
(GtkObjectInitFunc) type_as_function ## _init, \
/* reserved_1 */ NULL, \
/* reserved_2 */ NULL, \
(GtkClassInitFunc) NULL \
}; \
type_of_parent = parent_type_as_function ## _get_type (); \
object_type = gtk_type_unique (type_of_parent, &object_info); \
parent_class = gtk_type_class (type_of_parent); \
} \
return object_type; \
}
/* Just call the parent handler. This assumes that there is a variable
* named parent_class that points to the (duh!) parent class */
#define GNOME_CALL_PARENT_HANDLER(parent_class_cast, name, args) \
((parent_class_cast(parent_class)->name != NULL) ? \
parent_class_cast(parent_class)->name args : 0)
#define ASSERT_STRUCT_SIZE(struct_name,struct_size) \
G_STMT_START{ \
if (sizeof (struct_name) != struct_size) \
g_error ("Size of struct changed, update %s, %s: row %d\n", \
__FUNCTION__, __FILE__, __LINE__); \
}G_STMT_END
#endif /* __TYPE_UTILS_H__ */
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