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
  28 #ifdef __cplusplus
  29 extern "C" {
  30 #endif /* __cplusplus */
  31
  32
  33 /* --- type macros --- */
  34 #define G_TYPE_IS_OBJECT(type)      (G_TYPE_FUNDAMENTAL (type) == G_TYPE_OBJECT)
  35 #define G_OBJECT(object)            (G_TYPE_CHECK_INSTANCE_CAST ((object), G_TYPE_OBJECT, GObject))
  36 #define G_OBJECT_CLASS(class)       (G_TYPE_CHECK_CLASS_CAST ((class), G_TYPE_OBJECT, GObjectClass))
  37 #define G_IS_OBJECT(object)         (G_TYPE_CHECK_INSTANCE_TYPE ((object), G_TYPE_OBJECT))
  38 #define G_IS_OBJECT_CLASS(class)    (G_TYPE_CHECK_CLASS_TYPE ((class), G_TYPE_OBJECT))
  39 #define G_OBJECT_GET_CLASS(object)  (G_TYPE_INSTANCE_GET_CLASS ((object), G_TYPE_OBJECT, GObjectClass))
  40 #define G_OBJECT_TYPE(object)       (G_TYPE_FROM_INSTANCE (object))
  41 #define G_OBJECT_TYPE_NAME(object)  (g_type_name (G_OBJECT_TYPE (object)))
  42 #define G_OBJECT_CLASS_TYPE(class)  (G_TYPE_FROM_CLASS (class))
  43 #define G_OBJECT_CLASS_NAME(class)  (g_type_name (G_OBJECT_CLASS_TYPE (class)))
  44 #define G_VALUE_HOLDS_OBJECT(value) (G_TYPE_CHECK_VALUE_TYPE ((value), G_TYPE_OBJECT))
  45
  46
  47 /* --- typedefs & structures --- */
  48 typedef struct _GObject                  GObject;
  49 typedef struct _GObjectClass             GObjectClass;
  50 typedef struct _GObjectConstructParam    GObjectConstructParam;
  51 typedef void (*GObjectGetPropertyFunc)  (GObject      *object,
  52                                          guint         property_id,
  53                                          GValue       *value,
  54                                          GParamSpec   *pspec);
  55 typedef void (*GObjectSetPropertyFunc)  (GObject      *object,
  56                                          guint         property_id,
  57                                          const GValue *value,
  58                                          GParamSpec   *pspec);
  59 typedef void (*GObjectFinalizeFunc)     (GObject      *object);
  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, these fields might vanish */
  73   guint        n_property_specs;
  74   GParamSpec **property_specs;
  75   GSList      *construct_properties;
  76
  77   /* public overridable methods */
  78   GObject*   (*constructor)     (GType                  type,
  79                                  guint                  n_construct_properties,
  80                                  GObjectConstructParam *construct_properties);
  81   void       (*set_property)            (GObject        *object,
  82                                          guint           property_id,
  83                                          const GValue   *value,
  84                                          GParamSpec     *pspec);
  85   void       (*get_property)            (GObject        *object,
  86                                          guint           property_id,
  87                                          GValue         *value,
  88                                          GParamSpec     *pspec);
  89   void       (*shutdown)                (GObject        *object);
  90   void       (*finalize)                (GObject        *object);
  91
  92   /*< private >*/
  93   void       (*dispatch_properties_changed) (GObject      *object,
  94                                              guint         n_pspecs,
  95                                              GParamSpec  **pspecs);
  96
  97   /* signals */
  98   void       (*properties_changed)      (GObject        *object,
  99                                          guint           n_pspecs,
 100                                          GParamSpec    **pspecs);
 101   void       (*notify)                  (GObject        *object,
 102                                          GParamSpec     *pspec);
 103 };
 104 struct _GObjectConstructParam
 105 {
 106   GParamSpec  *pspec;
 107   GValue      *value;
 108 };
 109
 110
 111 /* --- prototypes --- */
 112 void        g_object_class_install_property   (GObjectClass   *oclass,
 113                                                guint           property_id,
 114                                                GParamSpec     *pspec);
 115 GParamSpec* g_object_class_find_property      (GObjectClass   *oclass,
 116                                                const gchar    *property_name);
 117 gpointer    g_object_new                      (GType           object_type,
 118                                                const gchar    *first_property_name,
 119                                                ...);
 120 gpointer    g_object_new_valist               (GType           object_type,
 121                                                const gchar    *first_property_name,
 122                                                va_list         var_args);
 123 gpointer    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 gpointer    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 gpointer    g_object_get_qdata                (GObject        *object,
 154                                                GQuark          quark);
 155 void        g_object_set_qdata                (GObject        *object,
 156                                                GQuark          quark,
 157                                                gpointer        data);
 158 void        g_object_set_qdata_full           (GObject        *object,
 159                                                GQuark          quark,
 160                                                gpointer        data,
 161                                                GDestroyNotify  destroy);
 162 gpointer    g_object_steal_qdata              (GObject        *object,
 163                                                GQuark          quark);
 164 gpointer    g_object_get_data                 (GObject        *object,
 165                                                const gchar    *key);
 166 void        g_object_set_data                 (GObject        *object,
 167                                                const gchar    *key,
 168                                                gpointer        data);
 169 void        g_object_set_data_full            (GObject        *object,
 170                                                const gchar    *key,
 171                                                gpointer        data,
 172                                                GDestroyNotify  destroy);
 173 gpointer    g_object_steal_data               (GObject        *object,
 174                                                const gchar    *key);
 175 void        g_object_watch_closure            (GObject        *object,
 176                                                GClosure       *closure);
 177 GClosure*   g_cclosure_new_object             (GCallback       callback_func,
 178                                                gpointer        object);
 179 GClosure*   g_cclosure_new_object_swap        (GCallback       callback_func,
 180                                                gpointer        object);
 181 GClosure*   g_closure_new_object              (guint           sizeof_closure,
 182                                                GObject        *object);
 183 void        g_value_set_object                (GValue         *value,
 184                                                GObject        *v_object);
 185 gpointer    g_value_get_object                (const GValue   *value);
 186 GObject*    g_value_dup_object                (const GValue   *value);
 187 guint       g_signal_connect_object           (gpointer        instance,
 188                                                const gchar    *detailed_signal,
 189                                                GCallback       c_handler,
 190                                                gpointer        gobject,
 191                                                gboolean        swapped,
 192                                                gboolean        after);
 193
 194
 195 /* --- implementation macros --- */
 196 #define G_OBJECT_WARN_INVALID_PROPERTY_ID(object, property_id, pspec) \
 197 G_STMT_START { \
 198   GObject *_object = (GObject*) (object); \
 199   GParamSpec *_pspec = (GParamSpec*) (pspec); \
 200   guint _property_id = (property_id); \
 201   g_warning ("%s: invalid property id %u for \"%s\" of type `%s' in `%s'", \
 202              G_STRLOC, \
 203              _property_id, \
 204              _pspec->name, \
 205              g_type_name (G_PARAM_SPEC_TYPE (_pspec)), \
 206              G_OBJECT_TYPE_NAME (_object)); \
 207 } G_STMT_END
 208
 209
 210
 211 #ifdef __cplusplus
 212 }
 213 #endif /* __cplusplus */
 214
 215 #endif /* __G_OBJECT_H__ */