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 #if !defined (__GLIB_GOBJECT_H_INSIDE__) && !defined (GOBJECT_COMPILATION)
  20 #error "Only <glib-object.h> can be included directly."
  21 #endif
  22
  23 #ifndef __G_OBJECT_H__
  24 #define __G_OBJECT_H__
  25
  26 #include        <gobject/gtype.h>
  27 #include        <gobject/gvalue.h>
  28 #include        <gobject/gparam.h>
  29 #include        <gobject/gclosure.h>
  30 #include        <gobject/gsignal.h>
  31
  32 G_BEGIN_DECLS
  33
  34 /* --- type macros --- */
  35 #define G_TYPE_IS_OBJECT(type)      (G_TYPE_FUNDAMENTAL (type) == G_TYPE_OBJECT)
  36 #define G_OBJECT(object)            (G_TYPE_CHECK_INSTANCE_CAST ((object), G_TYPE_OBJECT, GObject))
  37 #define G_OBJECT_CLASS(class)       (G_TYPE_CHECK_CLASS_CAST ((class), G_TYPE_OBJECT, GObjectClass))
  38 #define G_IS_OBJECT(object)         (G_TYPE_CHECK_INSTANCE_TYPE ((object), G_TYPE_OBJECT))
  39 #define G_IS_OBJECT_CLASS(class)    (G_TYPE_CHECK_CLASS_TYPE ((class), G_TYPE_OBJECT))
  40 #define G_OBJECT_GET_CLASS(object)  (G_TYPE_INSTANCE_GET_CLASS ((object), G_TYPE_OBJECT, GObjectClass))
  41 #define G_OBJECT_TYPE(object)       (G_TYPE_FROM_INSTANCE (object))
  42 #define G_OBJECT_TYPE_NAME(object)  (g_type_name (G_OBJECT_TYPE (object)))
  43 #define G_OBJECT_CLASS_TYPE(class)  (G_TYPE_FROM_CLASS (class))
  44 #define G_OBJECT_CLASS_NAME(class)  (g_type_name (G_OBJECT_CLASS_TYPE (class)))
  45 #define G_VALUE_HOLDS_OBJECT(value) (G_TYPE_CHECK_VALUE_TYPE ((value), G_TYPE_OBJECT))
  46
  47
  48 /* --- typedefs & structures --- */
  49 typedef struct _GObject                  GObject;
  50 typedef struct _GObjectClass             GObjectClass;
  51 typedef struct _GObjectConstructParam    GObjectConstructParam;
  52 typedef void (*GObjectGetPropertyFunc)  (GObject      *object,
  53                                          guint         property_id,
  54                                          GValue       *value,
  55                                          GParamSpec   *pspec);
  56 typedef void (*GObjectSetPropertyFunc)  (GObject      *object,
  57                                          guint         property_id,
  58                                          const GValue *value,
  59                                          GParamSpec   *pspec);
  60 typedef void (*GObjectFinalizeFunc)     (GObject      *object);
  61 typedef void (*GWeakNotify)             (gpointer      data,
  62                                          GObject      *where_the_object_was);
  63 struct  _GObject
  64 {
  65   GTypeInstance g_type_instance;
  66
  67   /*< private >*/
  68   guint         ref_count;
  69   GData        *qdata;
  70 };
  71 struct  _GObjectClass
  72 {
  73   GTypeClass   g_type_class;
  74
  75   /*< private >*/
  76   GSList      *construct_properties;
  77
  78   /*< public >*/
  79   /* overridable methods */
  80   GObject*   (*constructor)     (GType                  type,
  81                                  guint                  n_construct_properties,
  82                                  GObjectConstructParam *construct_properties);
  83   void       (*set_property)            (GObject        *object,
  84                                          guint           property_id,
  85                                          const GValue   *value,
  86                                          GParamSpec     *pspec);
  87   void       (*get_property)            (GObject        *object,
  88                                          guint           property_id,
  89                                          GValue         *value,
  90                                          GParamSpec     *pspec);
  91   void       (*dispose)                 (GObject        *object);
  92   void       (*finalize)                (GObject        *object);
  93
  94   /* seldomly overidden */
  95   void       (*dispatch_properties_changed) (GObject      *object,
  96                                              guint         n_pspecs,
  97                                              GParamSpec  **pspecs);
  98
  99   /* signals */
 100   void       (*notify)                  (GObject        *object,
 101                                          GParamSpec     *pspec);
 102   /*< private >*/
 103   /* padding */
 104   gpointer      pdummy[8];
 105 };
 106 struct _GObjectConstructParam
 107 {
 108   GParamSpec *pspec;
 109   GValue     *value;
 110 };
 111
 112
 113 /* --- prototypes --- */
 114 void        g_object_class_install_property   (GObjectClass   *oclass,
 115                                                guint           property_id,
 116                                                GParamSpec     *pspec);
 117 GParamSpec* g_object_class_find_property      (GObjectClass   *oclass,
 118                                                const gchar    *property_name);
 119 GParamSpec**g_object_class_list_properties    (GObjectClass   *oclass,
 120                                                guint          *n_properties);
 121 void        g_object_class_override_property  (GObjectClass   *oclass,
 122                                                guint           property_id,
 123                                                const gchar    *name);
 124
 125 void        g_object_interface_install_property (gpointer     g_iface,
 126                                                  GParamSpec  *pspec);
 127 GParamSpec* g_object_interface_find_property    (gpointer     g_iface,
 128                                                  const gchar *property_name);
 129 GParamSpec**g_object_interface_list_properties  (gpointer     g_iface,
 130                                                  guint       *n_properties_p);
 131
 132 gpointer    g_object_new                      (GType           object_type,
 133                                                const gchar    *first_property_name,
 134                                                ...);
 135 gpointer    g_object_newv                     (GType           object_type,
 136                                                guint           n_parameters,
 137                                                GParameter     *parameters);
 138 GObject*    g_object_new_valist               (GType           object_type,
 139                                                const gchar    *first_property_name,
 140                                                va_list         var_args);
 141 void        g_object_set                      (gpointer        object,
 142                                                const gchar    *first_property_name,
 143                                                ...) G_GNUC_NULL_TERMINATED;
 144 void        g_object_get                      (gpointer        object,
 145                                                const gchar    *first_property_name,
 146                                                ...) G_GNUC_NULL_TERMINATED;
 147 gpointer    g_object_connect                  (gpointer        object,
 148                                                const gchar    *signal_spec,
 149                                                ...) G_GNUC_NULL_TERMINATED;
 150 void        g_object_disconnect               (gpointer        object,
 151                                                const gchar    *signal_spec,
 152                                                ...) G_GNUC_NULL_TERMINATED;
 153 void        g_object_set_valist               (GObject        *object,
 154                                                const gchar    *first_property_name,
 155                                                va_list         var_args);
 156 void        g_object_get_valist               (GObject        *object,
 157                                                const gchar    *first_property_name,
 158                                                va_list         var_args);
 159 void        g_object_set_property             (GObject        *object,
 160                                                const gchar    *property_name,
 161                                                const GValue   *value);
 162 void        g_object_get_property             (GObject        *object,
 163                                                const gchar    *property_name,
 164                                                GValue         *value);
 165 void        g_object_freeze_notify            (GObject        *object);
 166 void        g_object_notify                   (GObject        *object,
 167                                                const gchar    *property_name);
 168 void        g_object_thaw_notify              (GObject        *object);
 169 gpointer    g_object_ref                      (gpointer        object);
 170 void        g_object_unref                    (gpointer        object);
 171 void        g_object_weak_ref                 (GObject        *object,
 172                                                GWeakNotify     notify,
 173                                                gpointer        data);
 174 void        g_object_weak_unref               (GObject        *object,
 175                                                GWeakNotify     notify,
 176                                                gpointer        data);
 177 void        g_object_add_weak_pointer         (GObject        *object,
 178                                                gpointer       *weak_pointer_location);
 179 void        g_object_remove_weak_pointer      (GObject        *object,
 180                                                gpointer       *weak_pointer_location);
 181
 182 typedef void (*GToggleNotify) (gpointer      data,
 183                                GObject      *object,
 184                                gboolean      is_last_ref);
 185
 186 void g_object_add_toggle_ref    (GObject       *object,
 187                                  GToggleNotify  notify,
 188                                  gpointer       data);
 189 void g_object_remove_toggle_ref (GObject       *object,
 190                                  GToggleNotify  notify,
 191                                  gpointer       data);
 192
 193 gpointer    g_object_get_qdata                (GObject        *object,
 194                                                GQuark          quark);
 195 void        g_object_set_qdata                (GObject        *object,
 196                                                GQuark          quark,
 197                                                gpointer        data);
 198 void        g_object_set_qdata_full           (GObject        *object,
 199                                                GQuark          quark,
 200                                                gpointer        data,
 201                                                GDestroyNotify  destroy);
 202 gpointer    g_object_steal_qdata              (GObject        *object,
 203                                                GQuark          quark);
 204 gpointer    g_object_get_data                 (GObject        *object,
 205                                                const gchar    *key);
 206 void        g_object_set_data                 (GObject        *object,
 207                                                const gchar    *key,
 208                                                gpointer        data);
 209 void        g_object_set_data_full            (GObject        *object,
 210                                                const gchar    *key,
 211                                                gpointer        data,
 212                                                GDestroyNotify  destroy);
 213 gpointer    g_object_steal_data               (GObject        *object,
 214                                                const gchar    *key);
 215 void        g_object_watch_closure            (GObject        *object,
 216                                                GClosure       *closure);
 217 GClosure*   g_cclosure_new_object             (GCallback       callback_func,
 218                                                GObject        *object);
 219 GClosure*   g_cclosure_new_object_swap        (GCallback       callback_func,
 220                                                GObject        *object);
 221 GClosure*   g_closure_new_object              (guint           sizeof_closure,
 222                                                GObject        *object);
 223 void        g_value_set_object                (GValue         *value,
 224                                                gpointer        v_object);
 225 gpointer    g_value_get_object                (const GValue   *value);
 226 GObject*    g_value_dup_object                (const GValue   *value);
 227 gulong      g_signal_connect_object           (gpointer        instance,
 228                                                const gchar    *detailed_signal,
 229                                                GCallback       c_handler,
 230                                                gpointer        gobject,
 231                                                GConnectFlags   connect_flags);
 232
 233
 234 /*< protected >*/
 235 void        g_object_run_dispose              (GObject        *object);
 236
 237
 238 void        g_value_take_object               (GValue         *value,
 239                                                gpointer        v_object);
 240 #ifndef G_DISABLE_DEPRECATED
 241 void        g_value_set_object_take_ownership (GValue         *value,
 242                                                gpointer        v_object);
 243 #endif
 244
 245 /* --- implementation macros --- */
 246 #define G_OBJECT_WARN_INVALID_PSPEC(object, pname, property_id, pspec) \
 247 G_STMT_START { \
 248   GObject *_object = (GObject*) (object); \
 249   GParamSpec *_pspec = (GParamSpec*) (pspec); \
 250   guint _property_id = (property_id); \
 251   g_warning ("%s: invalid %s id %u for \"%s\" of type `%s' in `%s'", \
 252              G_STRLOC, \
 253              (pname), \
 254              _property_id, \
 255              _pspec->name, \
 256              g_type_name (G_PARAM_SPEC_TYPE (_pspec)), \
 257              G_OBJECT_TYPE_NAME (_object)); \
 258 } G_STMT_END
 259 #define G_OBJECT_WARN_INVALID_PROPERTY_ID(object, property_id, pspec) \
 260     G_OBJECT_WARN_INVALID_PSPEC ((object), "property", (property_id), (pspec))
 261
 262 G_END_DECLS
 263
 264 #endif /* __G_OBJECT_H__ */