1 /* GTK - The GIMP Toolkit
2 * Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
4 * This library is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Lesser General Public
6 * License as published by the Free Software Foundation; either
7 * version 2 of the License, or (at your option) any later version.
9 * This library is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * Lesser General Public License for more details.
14 * You should have received a copy of the GNU Lesser General Public
15 * License along with this library; if not, write to the
16 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
17 * Boston, MA 02111-1307, USA.
21 * Modified by the GTK+ Team and others 1997-2000. See the AUTHORS
22 * file for a list of people on the GTK+ Team. See the ChangeLog
23 * files for a list of changes. These files are distributed with
24 * GTK+ at ftp://ftp.gtk.org/pub/gtk/.
27 #ifndef __GTK_OBJECT_H__
28 #define __GTK_OBJECT_H__
31 #include <gtk/gtkenums.h>
32 #include <gtk/gtktypeutils.h>
33 #include <gtk/gtkdebug.h>
37 /* macros for casting a pointer to a GtkObject or GtkObjectClass pointer,
38 * and to test whether `object' and `klass' are of type GTK_TYPE_OBJECT.
39 * these are the standard macros for all GtkObject-derived classes.
41 #define GTK_TYPE_OBJECT (gtk_object_get_type ())
42 #define GTK_OBJECT(object) (GTK_CHECK_CAST ((object), GTK_TYPE_OBJECT, GtkObject))
43 #define GTK_OBJECT_CLASS(klass) (GTK_CHECK_CLASS_CAST ((klass), GTK_TYPE_OBJECT, GtkObjectClass))
44 #define GTK_IS_OBJECT(object) (GTK_CHECK_TYPE ((object), GTK_TYPE_OBJECT))
45 #define GTK_IS_OBJECT_CLASS(klass) (GTK_CHECK_CLASS_TYPE ((klass), GTK_TYPE_OBJECT))
46 #define GTK_OBJECT_GET_CLASS(object) (GTK_CHECK_GET_CLASS ((object), GTK_TYPE_OBJECT, GtkObjectClass))
48 /* Macros for extracting various fields from GtkObject and GtkObjectClass.
50 #define GTK_OBJECT_TYPE(object) (G_TYPE_FROM_INSTANCE (object))
51 #define GTK_OBJECT_TYPE_NAME(object) (g_type_name (GTK_OBJECT_TYPE (object)))
53 /* GtkObject only uses the first 4 bits of the flags field.
54 * Derived objects may use the remaining bits. Though this
55 * is a kinda nasty break up, it does make the size of
56 * derived objects smaller.
60 GTK_IN_DESTRUCTION = 1 << 0, /* Used internally during dispose */
61 GTK_FLOATING = 1 << 1,
62 GTK_RESERVED_1 = 1 << 2,
63 GTK_RESERVED_2 = 1 << 3
66 /* Macros for extracting the object_flags from GtkObject.
68 #define GTK_OBJECT_FLAGS(obj) (GTK_OBJECT (obj)->flags)
69 #define GTK_OBJECT_FLOATING(obj) ((GTK_OBJECT_FLAGS (obj) & GTK_FLOATING) != 0)
71 /* Macros for setting and clearing bits in the object_flags field of GtkObject.
73 #define GTK_OBJECT_SET_FLAGS(obj,flag) G_STMT_START{ (GTK_OBJECT_FLAGS (obj) |= (flag)); }G_STMT_END
74 #define GTK_OBJECT_UNSET_FLAGS(obj,flag) G_STMT_START{ (GTK_OBJECT_FLAGS (obj) &= ~(flag)); }G_STMT_END
76 typedef struct _GtkObjectClass GtkObjectClass;
79 /* The GtkObject structure is the base of the Gtk+ objects hierarchy,
80 * it ``inherits'' from the GtkTypeObject by mirroring its fields,
81 * which must always be kept in sync completely. The GtkObject defines
82 * the few basic items that all derived classes contain.
86 GObject parent_instance;
88 /* 32 bits of flags. GtkObject only uses 4 of these bits and
89 * GtkWidget uses the rest. This is done because structs are
90 * aligned on 4 or 8 byte boundaries. If a new bitfield were
91 * used in GtkWidget much space would be wasted.
96 /* The GtkObjectClass is the base of the Gtk+ objects classes hierarchy,
97 * it ``inherits'' from the GtkTypeClass by mirroring its fields, which
98 * must always be kept in sync completely. The GtkObjectClass defines
99 * the basic necessities for the object inheritance mechanism to work.
101 struct _GtkObjectClass
103 GObjectClass parent_class;
105 /* Non overridable class methods to set and get per class arguments */
106 void (*set_arg) (GtkObject *object,
109 void (*get_arg) (GtkObject *object,
113 /* The function that will end an objects life time. In one way ore
114 * another all three of them are defined for all objects. If an
115 * object class overrides one of the methods in order to perform class
116 * specific destruction then it must still invoke its superclass'
117 * implementation of the method after it is finished with its
118 * own cleanup. (See the destroy function for GtkWidget for
119 * an example of how to do this).
121 void (*destroy) (GtkObject *object);
126 /* Application-level methods */
128 GtkType gtk_object_get_type (void) G_GNUC_CONST;
130 GtkObject* gtk_object_new (GtkType type,
131 const gchar *first_property_name,
134 void gtk_object_sink (GtkObject *object);
135 void gtk_object_destroy (GtkObject *object);
137 /****************************************************************/
139 #ifndef GTK_DISABLE_DEPRECATED
141 GtkObject* gtk_object_ref (GtkObject *object);
142 void gtk_object_unref (GtkObject *object);
143 void gtk_object_weakref (GtkObject *object,
144 GtkDestroyNotify notify,
146 void gtk_object_weakunref (GtkObject *object,
147 GtkDestroyNotify notify,
150 /* Set 'data' to the "object_data" field of the object. The
151 * data is indexed by the "key". If there is already data
152 * associated with "key" then the new data will replace it.
153 * If 'data' is NULL then this call is equivalent to
154 * 'gtk_object_remove_data'.
155 * The gtk_object_set_data_full variant acts just the same,
156 * but takes an additional argument which is a function to
157 * be called when the data is removed.
158 * `gtk_object_remove_data' is equivalent to the above,
159 * where 'data' is NULL
160 * `gtk_object_get_data' gets the data associated with "key".
162 void gtk_object_set_data (GtkObject *object,
165 void gtk_object_set_data_full (GtkObject *object,
168 GtkDestroyNotify destroy);
169 void gtk_object_remove_data (GtkObject *object,
171 gpointer gtk_object_get_data (GtkObject *object,
173 void gtk_object_remove_no_notify (GtkObject *object,
176 /* Set/get the "user_data" object data field of "object". It should
177 * be noted that these functions are no different than calling
178 * `gtk_object_set_data'/`gtk_object_get_data' with a key of "user_data".
179 * They are merely provided as a convenience.
181 void gtk_object_set_user_data (GtkObject *object,
183 gpointer gtk_object_get_user_data (GtkObject *object);
186 /* Object-level methods */
188 /* Object data method variants that operate on key ids. */
189 void gtk_object_set_data_by_id (GtkObject *object,
192 void gtk_object_set_data_by_id_full (GtkObject *object,
195 GtkDestroyNotify destroy);
196 gpointer gtk_object_get_data_by_id (GtkObject *object,
198 void gtk_object_remove_data_by_id (GtkObject *object,
200 void gtk_object_remove_no_notify_by_id (GtkObject *object,
202 #define gtk_object_data_try_key g_quark_try_string
203 #define gtk_object_data_force_id g_quark_from_string
205 /* GtkArg flag bits for gtk_object_add_arg_type
209 GTK_ARG_READABLE = G_PARAM_READABLE,
210 GTK_ARG_WRITABLE = G_PARAM_WRITABLE,
211 GTK_ARG_CONSTRUCT = G_PARAM_CONSTRUCT,
212 GTK_ARG_CONSTRUCT_ONLY = G_PARAM_CONSTRUCT_ONLY,
213 GTK_ARG_CHILD_ARG = 1 << 4
215 #define GTK_ARG_READWRITE (GTK_ARG_READABLE | GTK_ARG_WRITABLE)
216 void gtk_object_get (GtkObject *object,
217 const gchar *first_property_name,
219 void gtk_object_set (GtkObject *object,
220 const gchar *first_property_name,
222 void gtk_object_add_arg_type (const gchar *arg_name,
227 #endif /* GTK_DISABLE_DEPRECATED */
231 #endif /* __GTK_OBJECT_H__ */