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gtk2/gtk/gtkobject.h
Tim Janik afee2c67c5 applied patch from Andreas Persenius <ndap@swipnet.se> that updates the 
Wed Jul 26 12:59:31 2000  Tim Janik  <timj@gtk.org>

        * *.[hc]: applied patch from Andreas Persenius <ndap@swipnet.se> that
        updates the license headers to the GNU Lesser General Public License,
        as well as updating the copyright year to 2000.
2000-07-26 11:33:08 +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/gtkarg.h>
#include <gtk/gtkenums.h>
#include <gtk/gtktypeutils.h>
#include <gtk/gtkdebug.h>
#ifdef __cplusplus
extern "C" {
#endif /* __cplusplus */
/* 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_DESTROYED = 1 << 0,
GTK_FLOATING = 1 << 1,
GTK_CONNECTED = 1 << 2,
GTK_CONSTRUCTED = 1 << 3
} GtkObjectFlags;
/* Macros for extracting the object_flags from GtkObject.
*/
#define GTK_OBJECT_FLAGS(obj) (GTK_OBJECT (obj)->flags)
#define GTK_OBJECT_DESTROYED(obj) ((GTK_OBJECT_FLAGS (obj) & GTK_DESTROYED) != 0)
#define GTK_OBJECT_FLOATING(obj) ((GTK_OBJECT_FLAGS (obj) & GTK_FLOATING) != 0)
#define GTK_OBJECT_CONNECTED(obj) ((GTK_OBJECT_FLAGS (obj) & GTK_CONNECTED) != 0)
#define GTK_OBJECT_CONSTRUCTED(obj) ((GTK_OBJECT_FLAGS (obj) & GTK_CONSTRUCTED) != 0)
/* 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
/* GtkArg flag bits for gtk_object_add_arg_type
*/
typedef enum
{
GTK_ARG_READABLE = 1 << 0,
GTK_ARG_WRITABLE = 1 << 1,
GTK_ARG_CONSTRUCT = 1 << 2,
GTK_ARG_CONSTRUCT_ONLY = 1 << 3,
GTK_ARG_CHILD_ARG = 1 << 4,
GTK_ARG_MASK = 0x1f,
/* aliases
*/
GTK_ARG_READWRITE = GTK_ARG_READABLE | GTK_ARG_WRITABLE
} GtkArgFlags;
typedef struct _GtkObjectClass GtkObjectClass;
/* The GtkObject structure is the base of the Gtk+ objects hierarchy,
* it ``inherits'' from the GtkTypeObject by mirroring its fields,
* which must always be kept in sync completely. The GtkObject defines
* the few basic items that all derived classes contain.
*/
struct _GtkObject
{
GObject 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;
};
/* The GtkObjectClass is the base of the Gtk+ objects classes hierarchy,
* it ``inherits'' from the GtkTypeClass by mirroring its fields, which
* must always be kept in sync completely. The GtkObjectClass defines
* the basic necessities for the object inheritance mechanism to work.
* Namely, the `signals' and `nsignals' fields as well as the function
* pointers, required to end an object's lifetime.
*/
struct _GtkObjectClass
{
GObjectClass parent_class;
/* The signals this object class handles. "signals" is an
* array of signal ID's.
*/
guint *signals;
/* The number of signals listed in "signals".
*/
guint nsignals;
/* The number of arguments per class.
*/
guint n_args;
GSList *construct_args;
/* 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);
/* The function that will end an objects life time. In one way ore
* another all three of them are defined for all objects. If an
* object class overrides one of the methods 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 the destroy function for GtkWidget for
* an example of how to do this).
*/
void (* destroy) (GtkObject *object);
};
/* Application-level methods */
GtkType gtk_object_get_type (void);
/* Append a user defined signal without default handler to a class. */
guint gtk_object_class_user_signal_new (GtkObjectClass *klass,
const gchar *name,
GtkSignalRunType signal_flags,
GtkSignalMarshaller marshaller,
GtkType return_val,
guint nparams,
...);
guint gtk_object_class_user_signal_newv (GtkObjectClass *klass,
const gchar *name,
GtkSignalRunType signal_flags,
GtkSignalMarshaller marshaller,
GtkType return_val,
guint nparams,
GtkType *params);
GtkObject* gtk_object_new (GtkType type,
const gchar *first_arg_name,
...);
GtkObject* gtk_object_newv (GtkType object_type,
guint n_args,
GtkArg *args);
GtkObject* gtk_object_ref (GtkObject *object);
void gtk_object_unref (GtkObject *object);
void gtk_object_default_construct (GtkObject *object);
void gtk_object_constructed (GtkObject *object);
void gtk_object_sink (GtkObject *object);
void gtk_object_weakref (GtkObject *object,
GtkDestroyNotify notify,
gpointer data);
void gtk_object_weakunref (GtkObject *object,
GtkDestroyNotify notify,
gpointer data);
void gtk_object_destroy (GtkObject *object);
/* gtk_object_getv() sets an arguments type and value, or just
* its type to GTK_TYPE_INVALID.
* if GTK_FUNDAMENTAL_TYPE (arg->type) == GTK_TYPE_STRING, it's
* the callers response to do a g_free (GTK_VALUE_STRING (arg));
*/
void gtk_object_getv (GtkObject *object,
guint n_args,
GtkArg *args);
/* gtk_object_get() sets the variable values pointed to by the adresses
* passed after the argument names according to the arguments value.
* if GTK_FUNDAMENTAL_TYPE (arg->type) == GTK_TYPE_STRING, it's
* the callers response to do a g_free (retrived_value);
*/
void gtk_object_get (GtkObject *object,
const gchar *first_arg_name,
...);
/* gtk_object_set() takes a variable argument list of the form:
* (..., gchar *arg_name, ARG_VALUES, [repeatedly name/value pairs,] NULL)
* where ARG_VALUES type depend on the argument and can consist of
* more than one c-function argument.
*/
void gtk_object_set (GtkObject *object,
const gchar *first_arg_name,
...);
void gtk_object_setv (GtkObject *object,
guint n_args,
GtkArg *args);
/* Allocate a GtkArg array of size nargs that hold the
* names and types of the args that can be used with
* gtk_object_set/gtk_object_get. if (arg_flags!=NULL),
* (*arg_flags) will be set to point to a newly allocated
* guint array that holds the flags of the args.
* It is the callers response to do a
* g_free (returned_args); g_free (*arg_flags).
*/
GtkArg* gtk_object_query_args (GtkType class_type,
guint32 **arg_flags,
guint *n_args);
/* 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 */
/* Append "signals" to those already defined in "class". */
void gtk_object_class_add_signals (GtkObjectClass *klass,
guint *signals,
guint nsignals);
/* the `arg_name' argument needs to be a const static string */
void gtk_object_add_arg_type (const gchar *arg_name,
GtkType arg_type,
guint arg_flags,
guint arg_id);
/* 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
/* Non-public methods */
void gtk_object_arg_set (GtkObject *object,
GtkArg *arg,
GtkArgInfo *info);
void gtk_object_arg_get (GtkObject *object,
GtkArg *arg,
GtkArgInfo *info);
gchar* gtk_object_args_collect (GtkType object_type,
GSList **arg_list_p,
GSList **info_list_p,
const gchar *first_arg_name,
va_list var_args);
gchar* gtk_object_arg_get_info (GtkType object_type,
const gchar *arg_name,
GtkArgInfo **info_p);
#ifdef __cplusplus
}
#endif /* __cplusplus */
#endif /* __GTK_OBJECT_H__ */
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