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gtk2/gtk/gtkobject.h
Tim Janik 294cfcdb22 make use of *_by_id() functions for handler key. 
Sat Mar 14 02:03:13 1998  Tim Janik  <timj@gimp.org>

        * gtk/gtksignal.c: make use of *_by_id() functions for handler key.

        * gtk/gtkwidget.c: make use of *_by_id() functions for a bunch of keys.
        (gtk_widget_shutdown): new function to perform pre-destruction shutdown
        of the widget.
        (gtk_widget_unparent): call gtk_widget_set_parent_window(widget,NULL)

        * gtk/gtkobject.h:
        * gtk/gtkobject.c: GtkObject destruction is now split into an internally
        used shutdown class method and the usual GtkObject::destroy signal
        emission. this allowes for class based shutdown functionality prior
        to actuall object destruction.
        added *_by_id() counterparts for gtk_object_data_* functions, meant for
        internal use only.

        * gtk/gtkmain.c (gtk_quit_add_destroy): new function which will destroy
        a GtkObject once gtk_main() of a certain level finishes. it is save to
        destroy the object prior to that, gtk_quit_add_destroy will only destroy
        objects that are still existing.
1998-03-14 04:43:14 +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 Library 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
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the Free
* Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#ifndef __GTK_OBJECT_H__
#define __GTK_OBJECT_H__
#include <gtk/gtkenums.h>
#include <gtk/gtktypeutils.h>
#include <gtk/gtkdebug.h>
#ifdef __cplusplus
extern "C" {
#endif /* __cplusplus */
/* The debugging versions of the casting macros make sure the cast is "ok"
* before proceeding, but they are definately slower than their less
* careful counterparts as they involve no less than 3 function calls.
*/
#ifdef GTK_NO_CHECK_CASTS
#define GTK_CHECK_CAST(obj,cast_type,cast) ((cast*) (obj))
#define GTK_CHECK_CLASS_CAST(klass,cast_type,cast) ((cast*) (klass))
#else /* !GTK_NO_CHECK_CASTS */
#define GTK_CHECK_CAST(obj,cast_type,cast) \
((cast*) gtk_object_check_cast ((GtkObject*) (obj), (cast_type)))
#define GTK_CHECK_CLASS_CAST(klass,cast_type,cast) \
((cast*) gtk_object_check_class_cast ((GtkObjectClass*) (klass), (cast_type)))
#endif /* GTK_NO_CHECK_CASTS */
/* Determines whether 'obj' is a type of 'otype'.
*/
#define GTK_CHECK_TYPE(obj,otype) (gtk_type_is_a (((GtkObject*) (obj))->klass->type, (otype)))
/* Macro for casting a pointer to a GtkObject pointer.
*/
#define GTK_OBJECT(obj) GTK_CHECK_CAST ((obj), gtk_object_get_type (), GtkObject)
/* Macros for extracting various fields from GtkObject and GtkObjectClass.
*/
#define GTK_OBJECT_CLASS(klass) (GTK_CHECK_CLASS_CAST ((klass), gtk_object_get_type (), GtkObjectClass))
#define GTK_OBJECT_TYPE(obj) (GTK_OBJECT (obj)->klass->type)
#define GTK_OBJECT_SIGNALS(obj) (GTK_OBJECT (obj)->klass->signals)
#define GTK_OBJECT_NSIGNALS(obj) (GTK_OBJECT (obj)->klass->nsignals)
/* 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.
*/
enum
{
GTK_DESTROYED = 1 << 0,
GTK_FLOATING = 1 << 1,
GTK_RESERVED_1 = 1 << 2,
GTK_RESERVED_2 = 1 << 3,
GTK_OBJECT_FLAG_LAST = GTK_RESERVED_2
};
/* GtkArg flag bits for gtk_object_add_arg_type
*/
enum
{
GTK_ARG_READABLE = 1 << 0,
GTK_ARG_WRITABLE = 1 << 1,
GTK_ARG_CONSTRUCT = 1 << 2
};
#define GTK_ARG_READWRITE (GTK_ARG_READABLE | GTK_ARG_WRITABLE)
/* 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)
#define GTK_OBJECT_FLOATING(obj) (GTK_OBJECT_FLAGS (obj) & GTK_FLOATING)
/* 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
/* Macro for testing whether "obj" is of type GtkObject.
*/
#define GTK_IS_OBJECT(obj) (GTK_CHECK_TYPE ((obj), gtk_object_get_type ()))
typedef struct _GtkObjectClass GtkObjectClass;
/* GtkObject is the base of the object hierarchy. It defines
* the few basic items that all derived classes contain.
*/
struct _GtkObject
{
/* A pointer to the objects class. This will actually point to
* the derived objects class struct (which will be derived from
* GtkObjectClass).
*/
GtkObjectClass *klass;
/* 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;
/* reference count.
* refer to the file REFCOUNTING on this issue.
*/
guint ref_count;
/* The list of signal handlers and other data
* fields for this object.
*/
gpointer object_data;
};
/* GtkObjectClass is the base of the class hierarchy. It defines
* the basic necessities for the class mechanism to work. Namely,
* the "type", "signals" and "nsignals" fields.
*/
struct _GtkObjectClass
{
/* The type identifier for the objects class. There is
* one unique identifier per class.
*/
GtkType type;
/* 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;
/* The functions 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 (* shutdown) (GtkObject *object);
void (* destroy) (GtkObject *object);
void (* finalize) (GtkObject *object);
};
/* For the purpose of user signals we need the signal function
* and signal marshaller signatures already in this place.
*/
#define GTK_SIGNAL_FUNC(f) ((GtkSignalFunc) f)
typedef void (*GtkSignalFunc) (void);
typedef void (*GtkSignalMarshaller) (GtkObject *object,
GtkSignalFunc func,
gpointer func_data,
GtkArg *args);
/* Get the type identifier for GtkObject's.
*/
guint gtk_object_get_type (void);
/* Append "signals" to those already defined in "class".
*/
void gtk_object_class_add_signals (GtkObjectClass *klass,
guint *signals,
guint nsignals);
/* Append a user defined signal without default handler to a class.
*/
guint gtk_object_class_add_user_signal (GtkObjectClass *klass,
const gchar *name,
GtkSignalMarshaller marshaller,
GtkType return_val,
guint nparams,
...);
GtkObject* gtk_object_new (GtkType type,
...);
GtkObject* gtk_object_newv (GtkType type,
guint nargs,
GtkArg *args);
void gtk_object_sink (GtkObject *object);
void 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);
void gtk_object_destroy (GtkObject *object);
/* gtk_object_getv() sets an arguments type and value, or just
* its type to GTK_TYPE_INVALID.
* if 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 nargs,
GtkArg *args);
/* 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,
...);
void gtk_object_setv (GtkObject *object,
guint nargs,
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 (*acess_masks).
*/
GtkArg* gtk_object_query_args (GtkType class_type,
guint32 **arg_flags,
guint *nargs);
void gtk_object_add_arg_type (const gchar *arg_name,
GtkType arg_type,
guint arg_flags,
guint arg_id);
GtkType gtk_object_get_arg_type (const gchar *arg_name);
/* 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'.
*/
void gtk_object_set_data (GtkObject *object,
const gchar *key,
gpointer data);
/* Like gtk_object_set_data, but takes an additional argument
* which is a function to be called when the data is removed.
*/
void gtk_object_set_data_full (GtkObject *object,
const gchar *key,
gpointer data,
GtkDestroyNotify destroy);
/* Get the data associated with "key".
*/
gpointer gtk_object_get_data (GtkObject *object,
const gchar *key);
/* Remove the data associated with "key". This call is
* equivalent to 'gtk_object_set_data' where 'data' is NULL.
*/
void gtk_object_remove_data (GtkObject *object,
const gchar *key);
/* Object data functions that operate on key ids.
* These functions are meant for *internal* use only.
*/
void gtk_object_set_data_by_id (GtkObject *object,
guint data_id,
gpointer data);
void gtk_object_set_data_by_id_full (GtkObject *object,
guint data_id,
gpointer data,
GtkDestroyNotify destroy);
gpointer gtk_object_get_data_by_id (GtkObject *object,
guint data_id);
void gtk_object_remove_data_by_id (GtkObject *object,
guint data_id);
guint gtk_object_data_try_key (const gchar *key);
guint gtk_object_data_force_id (const gchar *key);
/* Set the "user_data" object data field of "object". It should
* be noted that this is no different than calling 'gtk_object_set_data'
* with a key of "user_data". It is merely provided as a convenience.
*/
void gtk_object_set_user_data (GtkObject *object,
gpointer data);
/* Get the "user_data" object data field of "object". It should
* be noted that this is no different than calling 'gtk_object_get_data'
* with a key of "user_data". It is merely provided as a convenience.
*/
gpointer gtk_object_get_user_data (GtkObject *object);
GtkObject* gtk_object_check_cast (GtkObject *obj,
GtkType cast_type);
GtkObjectClass* gtk_object_check_class_cast (GtkObjectClass *klass,
GtkType cast_type);
void gtk_trace_referencing (gpointer *object,
const gchar *func,
guint local_frame,
guint line,
gboolean do_ref);
#if G_ENABLE_DEBUG && defined (__GNUC__)
# define gtk_object_ref(o) G_STMT_START{static guint f=0;gtk_trace_referencing((gpointer)o,__PRETTY_FUNCTION__,++f,__LINE__, 1);f--;}G_STMT_END
# define gtk_object_unref(o) G_STMT_START{static guint f=0;gtk_trace_referencing((gpointer)o,__PRETTY_FUNCTION__,++f,__LINE__, 0);f--;}G_STMT_END
#endif /* G_ENABLE_DEBUG && __GNUC__ */
#ifdef __cplusplus
}
#endif /* __cplusplus */
#endif /* __GTK_OBJECT_H__ */
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