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