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gtk2/gtk/gtkobject.h
Tim Janik b805119dd1 renamed GUnowned to GInitiallyUnowned. 
Thu Dec 22 18:53:14 2005  Tim Janik  <timj@gtk.org>

        * gtk/gtkobject.[hc]: renamed GUnowned to GInitiallyUnowned.
2005-12-22 17:58:40 +00:00

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/* GTK - The GIMP Toolkit
* Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
/*
* Modified by the GTK+ Team and others 1997-2000. See the AUTHORS
* file for a list of people on the GTK+ Team. See the ChangeLog
* files for a list of changes. These files are distributed with
* GTK+ at ftp://ftp.gtk.org/pub/gtk/.
*/
#ifndef __GTK_OBJECT_H__
#define __GTK_OBJECT_H__
#include <gtk/gtkenums.h>
#include <gtk/gtktypeutils.h>
#include <gtk/gtkdebug.h>
G_BEGIN_DECLS
/* macros for casting a pointer to a GtkObject or GtkObjectClass pointer,
* and to test whether `object' and `klass' are of type GTK_TYPE_OBJECT.
* these are the standard macros for all GtkObject-derived classes.
*/
#define GTK_TYPE_OBJECT (gtk_object_get_type ())
#define GTK_OBJECT(object) (GTK_CHECK_CAST ((object), GTK_TYPE_OBJECT, GtkObject))
#define GTK_OBJECT_CLASS(klass) (GTK_CHECK_CLASS_CAST ((klass), GTK_TYPE_OBJECT, GtkObjectClass))
#define GTK_IS_OBJECT(object) (GTK_CHECK_TYPE ((object), GTK_TYPE_OBJECT))
#define GTK_IS_OBJECT_CLASS(klass) (GTK_CHECK_CLASS_TYPE ((klass), GTK_TYPE_OBJECT))
#define GTK_OBJECT_GET_CLASS(object) (GTK_CHECK_GET_CLASS ((object), GTK_TYPE_OBJECT, GtkObjectClass))
/* Macros for extracting various fields from GtkObject and GtkObjectClass.
*/
#define GTK_OBJECT_TYPE(object) (G_TYPE_FROM_INSTANCE (object))
#define GTK_OBJECT_TYPE_NAME(object) (g_type_name (GTK_OBJECT_TYPE (object)))
/* GtkObject only uses the first 4 bits of the flags field.
* Derived objects may use the remaining bits. Though this
* is a kinda nasty break up, it does make the size of
* derived objects smaller.
*/
typedef enum
{
GTK_IN_DESTRUCTION = 1 << 0, /* Used internally during dispose */
#if !defined (GTK_DISABLE_DEPRECATED) || defined (GTK_COMPILATION)
GTK_FLOATING = 1 << 1,
#endif
GTK_RESERVED_1 = 1 << 2,
GTK_RESERVED_2 = 1 << 3
} GtkObjectFlags;
/* Macros for extracting the object_flags from GtkObject.
*/
#define GTK_OBJECT_FLAGS(obj) (GTK_OBJECT (obj)->flags)
#ifndef GTK_DISABLE_DEPRECATED
#define GTK_OBJECT_FLOATING(obj) (g_object_is_floating (obj))
#endif
/* Macros for setting and clearing bits in the object_flags field of GtkObject.
*/
#define GTK_OBJECT_SET_FLAGS(obj,flag) G_STMT_START{ (GTK_OBJECT_FLAGS (obj) |= (flag)); }G_STMT_END
#define GTK_OBJECT_UNSET_FLAGS(obj,flag) G_STMT_START{ (GTK_OBJECT_FLAGS (obj) &= ~(flag)); }G_STMT_END
typedef struct _GtkObjectClass GtkObjectClass;
struct _GtkObject
{
GInitiallyUnowned parent_instance;
/* 32 bits of flags. GtkObject only uses 4 of these bits and
* GtkWidget uses the rest. This is done because structs are
* aligned on 4 or 8 byte boundaries. If a new bitfield were
* used in GtkWidget much space would be wasted.
*/
guint32 flags;
};
struct _GtkObjectClass
{
GInitiallyUnownedClass parent_class;
/* Non overridable class methods to set and get per class arguments */
void (*set_arg) (GtkObject *object,
GtkArg *arg,
guint arg_id);
void (*get_arg) (GtkObject *object,
GtkArg *arg,
guint arg_id);
/* Default signal handler for the ::destroy signal, which is
* invoked to request that references to the widget be dropped.
* If an object class overrides destroy() in order to perform class
* specific destruction then it must still invoke its superclass'
* implementation of the method after it is finished with its
* own cleanup. (See gtk_widget_real_destroy() for an example of
* how to do this).
*/
void (*destroy) (GtkObject *object);
};
/* Application-level methods */
GtkType gtk_object_get_type (void) G_GNUC_CONST;
#ifndef GTK_DISABLE_DEPRECATED
void gtk_object_sink (GtkObject *object);
#endif
void gtk_object_destroy (GtkObject *object);
/****************************************************************/
#ifndef GTK_DISABLE_DEPRECATED
GtkObject* gtk_object_new (GtkType type,
const gchar *first_property_name,
...);
GtkObject* gtk_object_ref (GtkObject *object);
void gtk_object_unref (GtkObject *object);
void gtk_object_weakref (GtkObject *object,
GtkDestroyNotify notify,
gpointer data);
void gtk_object_weakunref (GtkObject *object,
GtkDestroyNotify notify,
gpointer data);
/* Set 'data' to the "object_data" field of the object. The
* data is indexed by the "key". If there is already data
* associated with "key" then the new data will replace it.
* If 'data' is NULL then this call is equivalent to
* 'gtk_object_remove_data'.
* The gtk_object_set_data_full variant acts just the same,
* but takes an additional argument which is a function to
* be called when the data is removed.
* `gtk_object_remove_data' is equivalent to the above,
* where 'data' is NULL
* `gtk_object_get_data' gets the data associated with "key".
*/
void gtk_object_set_data (GtkObject *object,
const gchar *key,
gpointer data);
void gtk_object_set_data_full (GtkObject *object,
const gchar *key,
gpointer data,
GtkDestroyNotify destroy);
void gtk_object_remove_data (GtkObject *object,
const gchar *key);
gpointer gtk_object_get_data (GtkObject *object,
const gchar *key);
void gtk_object_remove_no_notify (GtkObject *object,
const gchar *key);
/* Set/get the "user_data" object data field of "object". It should
* be noted that these functions are no different than calling
* `gtk_object_set_data'/`gtk_object_get_data' with a key of "user_data".
* They are merely provided as a convenience.
*/
void gtk_object_set_user_data (GtkObject *object,
gpointer data);
gpointer gtk_object_get_user_data (GtkObject *object);
/* Object-level methods */
/* Object data method variants that operate on key ids. */
void gtk_object_set_data_by_id (GtkObject *object,
GQuark data_id,
gpointer data);
void gtk_object_set_data_by_id_full (GtkObject *object,
GQuark data_id,
gpointer data,
GtkDestroyNotify destroy);
gpointer gtk_object_get_data_by_id (GtkObject *object,
GQuark data_id);
void gtk_object_remove_data_by_id (GtkObject *object,
GQuark data_id);
void gtk_object_remove_no_notify_by_id (GtkObject *object,
GQuark key_id);
#define gtk_object_data_try_key g_quark_try_string
#define gtk_object_data_force_id g_quark_from_string
/* GtkArg flag bits for gtk_object_add_arg_type
*/
typedef enum
{
GTK_ARG_READABLE = G_PARAM_READABLE,
GTK_ARG_WRITABLE = G_PARAM_WRITABLE,
GTK_ARG_CONSTRUCT = G_PARAM_CONSTRUCT,
GTK_ARG_CONSTRUCT_ONLY = G_PARAM_CONSTRUCT_ONLY,
GTK_ARG_CHILD_ARG = 1 << 4
} GtkArgFlags;
#define GTK_ARG_READWRITE (GTK_ARG_READABLE | GTK_ARG_WRITABLE)
void gtk_object_get (GtkObject *object,
const gchar *first_property_name,
...) G_GNUC_NULL_TERMINATED;
void gtk_object_set (GtkObject *object,
const gchar *first_property_name,
...) G_GNUC_NULL_TERMINATED;
void gtk_object_add_arg_type (const gchar *arg_name,
GtkType arg_type,
guint arg_flags,
guint arg_id);
#endif /* GTK_DISABLE_DEPRECATED */
G_END_DECLS
#endif /* __GTK_OBJECT_H__ */
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