gobject/gobject.h

   1 /* GObject - GLib Type, Object, Parameter and Signal Library
   2  * Copyright (C) 1998-1999, 2000-2001 Tim Janik and Red Hat, Inc.
   3  *
   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.
   8  *
   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.
  13  *
  14  * You should have received a copy of the GNU Lesser General
  15  * Public 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.
  18  */
  19 #ifndef __G_OBJECT_H__
  20 #define __G_OBJECT_H__
  21
  22 #include        <gobject/gtype.h>
  23 #include        <gobject/gvalue.h>
  24 #include        <gobject/gparam.h>
  25 #include        <gobject/gclosure.h>
  26
  27 G_BEGIN_DECLS
  28
  29 /* --- type macros --- */
  30 #define G_TYPE_IS_OBJECT(type)      (G_TYPE_FUNDAMENTAL (type) == G_TYPE_OBJECT)
  31 #define G_OBJECT(object)            (G_TYPE_CHECK_INSTANCE_CAST ((object), G_TYPE_OBJECT, GObject))
  32 #define G_OBJECT_CLASS(class)       (G_TYPE_CHECK_CLASS_CAST ((class), G_TYPE_OBJECT, GObjectClass))
  33 #define G_IS_OBJECT(object)         (G_TYPE_CHECK_INSTANCE_TYPE ((object), G_TYPE_OBJECT))
  34 #define G_IS_OBJECT_CLASS(class)    (G_TYPE_CHECK_CLASS_TYPE ((class), G_TYPE_OBJECT))
  35 #define G_OBJECT_GET_CLASS(object)  (G_TYPE_INSTANCE_GET_CLASS ((object), G_TYPE_OBJECT, GObjectClass))
  36 #define G_OBJECT_TYPE(object)       (G_TYPE_FROM_INSTANCE (object))
  37 #define G_OBJECT_TYPE_NAME(object)  (g_type_name (G_OBJECT_TYPE (object)))
  38 #define G_OBJECT_CLASS_TYPE(class)  (G_TYPE_FROM_CLASS (class))
  39 #define G_OBJECT_CLASS_NAME(class)  (g_type_name (G_OBJECT_CLASS_TYPE (class)))
  40 #define G_VALUE_HOLDS_OBJECT(value) (G_TYPE_CHECK_VALUE_TYPE ((value), G_TYPE_OBJECT))
  41
  42
  43 /* --- typedefs & structures --- */
  44 typedef struct _GObject                  GObject;
  45 typedef struct _GObjectClass             GObjectClass;
  46 typedef struct _GObjectConstructParam    GObjectConstructParam;
  47 typedef void (*GObjectGetPropertyFunc)  (GObject      *object,
  48                                          guint         property_id,
  49                                          GValue       *value,
  50                                          GParamSpec   *pspec);
  51 typedef void (*GObjectSetPropertyFunc)  (GObject      *object,
  52                                          guint         property_id,
  53                                          const GValue *value,
  54                                          GParamSpec   *pspec);
  55 typedef void (*GObjectFinalizeFunc)     (GObject      *object);
  56 struct  _GObject
  57 {
  58   GTypeInstance g_type_instance;
  59
  60   /*< private >*/
  61   guint         ref_count;
  62   GData        *qdata;
  63 };
  64 struct  _GObjectClass
  65 {
  66   GTypeClass   g_type_class;
  67
  68   /* private, these fields might vanish */
  69   guint        n_property_specs;
  70   GParamSpec **property_specs;
  71   GSList      *construct_properties;
  72
  73   /* public overridable methods */
  74   GObject*   (*constructor)     (GType                  type,
  75                                  guint                  n_construct_properties,
  76                                  GObjectConstructParam *construct_properties);
  77   void       (*set_property)            (GObject        *object,
  78                                          guint           property_id,
  79                                          const GValue   *value,
  80                                          GParamSpec     *pspec);
  81   void       (*get_property)            (GObject        *object,
  82                                          guint           property_id,
  83                                          GValue         *value,
  84                                          GParamSpec     *pspec);
  85   void       (*shutdown)                (GObject        *object);
  86   void       (*finalize)                (GObject        *object);
  87
  88   /*< private >*/
  89   void       (*dispatch_properties_changed) (GObject      *object,
  90                                              guint         n_pspecs,
  91                                              GParamSpec  **pspecs);
  92
  93   /* signals */
  94   void       (*properties_changed)      (GObject        *object,
  95                                          guint           n_pspecs,
  96                                          GParamSpec    **pspecs);
  97   void       (*notify)                  (GObject        *object,
  98                                          GParamSpec     *pspec);
  99 };
 100 struct _GObjectConstructParam
 101 {
 102   GParamSpec  *pspec;
 103   GValue      *value;
 104 };
 105
 106
 107 /* --- prototypes --- */
 108 void        g_object_class_install_property   (GObjectClass   *oclass,
 109                                                guint           property_id,
 110                                                GParamSpec     *pspec);
 111 GParamSpec* g_object_class_find_property      (GObjectClass   *oclass,
 112                                                const gchar    *property_name);
 113 gpointer    g_object_new                      (GType           object_type,
 114                                                const gchar    *first_property_name,
 115                                                ...);
 116 gpointer    g_object_new_valist               (GType           object_type,
 117                                                const gchar    *first_property_name,
 118                                                va_list         var_args);
 119 gpointer    g_object_set                      (gpointer        object,
 120                                                const gchar    *first_property_name,
 121                                                ...);
 122 void        g_object_get                      (gpointer        object,
 123                                                const gchar    *first_property_name,
 124                                                ...);
 125 gpointer    g_object_connect                  (gpointer        object,
 126                                                const gchar    *signal_spec,
 127                                                ...);
 128 gpointer    g_object_disconnect               (gpointer        object,
 129                                                const gchar    *signal_spec,
 130                                                ...);
 131 void        g_object_set_valist               (GObject        *object,
 132                                                const gchar    *first_property_name,
 133                                                va_list         var_args);
 134 void        g_object_get_valist               (GObject        *object,
 135                                                const gchar    *first_property_name,
 136                                                va_list         var_args);
 137 void        g_object_set_property             (GObject        *object,
 138                                                const gchar    *property_name,
 139                                                const GValue   *value);
 140 void        g_object_get_property             (GObject        *object,
 141                                                const gchar    *property_name,
 142                                                GValue         *value);
 143 void        g_object_freeze_notify            (GObject        *object);
 144 void        g_object_notify                   (GObject        *object,
 145                                                const gchar    *property_name);
 146 void        g_object_thaw_notify              (GObject        *object);
 147 gpointer    g_object_ref                      (gpointer        object);
 148 void        g_object_unref                    (gpointer        object);
 149 gpointer    g_object_get_qdata                (GObject        *object,
 150                                                GQuark          quark);
 151 void        g_object_set_qdata                (GObject        *object,
 152                                                GQuark          quark,
 153                                                gpointer        data);
 154 void        g_object_set_qdata_full           (GObject        *object,
 155                                                GQuark          quark,
 156                                                gpointer        data,
 157                                                GDestroyNotify  destroy);
 158 gpointer    g_object_steal_qdata              (GObject        *object,
 159                                                GQuark          quark);
 160 gpointer    g_object_get_data                 (GObject        *object,
 161                                                const gchar    *key);
 162 void        g_object_set_data                 (GObject        *object,
 163                                                const gchar    *key,
 164                                                gpointer        data);
 165 void        g_object_set_data_full            (GObject        *object,
 166                                                const gchar    *key,
 167                                                gpointer        data,
 168                                                GDestroyNotify  destroy);
 169 gpointer    g_object_steal_data               (GObject        *object,
 170                                                const gchar    *key);
 171 void        g_object_watch_closure            (GObject        *object,
 172                                                GClosure       *closure);
 173 GClosure*   g_cclosure_new_object             (GCallback       callback_func,
 174                                                gpointer        object);
 175 GClosure*   g_cclosure_new_object_swap        (GCallback       callback_func,
 176                                                gpointer        object);
 177 GClosure*   g_closure_new_object              (guint           sizeof_closure,
 178                                                GObject        *object);
 179 void        g_value_set_object                (GValue         *value,
 180                                                GObject        *v_object);
 181 gpointer    g_value_get_object                (const GValue   *value);
 182 GObject*    g_value_dup_object                (const GValue   *value);
 183 guint       g_signal_connect_object           (gpointer        instance,
 184                                                const gchar    *detailed_signal,
 185                                                GCallback       c_handler,
 186                                                gpointer        gobject,
 187                                                gboolean        swapped,
 188                                                gboolean        after);
 189
 190
 191 /* --- implementation macros --- */
 192 #define G_OBJECT_WARN_INVALID_PROPERTY_ID(object, property_id, pspec) \
 193 G_STMT_START { \
 194   GObject *_object = (GObject*) (object); \
 195   GParamSpec *_pspec = (GParamSpec*) (pspec); \
 196   guint _property_id = (property_id); \
 197   g_warning ("%s: invalid property id %u for \"%s\" of type `%s' in `%s'", \
 198              G_STRLOC, \
 199              _property_id, \
 200              _pspec->name, \
 201              g_type_name (G_PARAM_SPEC_TYPE (_pspec)), \
 202              G_OBJECT_TYPE_NAME (_object)); \
 203 } G_STMT_END
 204
 205 G_END_DECLS
 206
 207 #endif /* __G_OBJECT_H__ */