diff options
Diffstat (limited to 'gobject')
| -rw-r--r-- | gobject/gobject.c | 82 | ||||
| -rw-r--r-- | gobject/gobject.h | 2 | ||||
| -rw-r--r-- | gobject/gobject.symbols | 1 |
3 files changed, 78 insertions, 7 deletions
diff --git a/gobject/gobject.c b/gobject/gobject.c index ddfb47b7f..1b42070cb 100644 --- a/gobject/gobject.c +++ b/gobject/gobject.c @@ -849,12 +849,27 @@ g_object_freeze_notify (GObject *object) g_object_unref (object); } +static inline void +g_object_notify_by_spec_internal (GObject *object, + GParamSpec *pspec) +{ + GObjectNotifyQueue *nqueue; + + nqueue = g_object_notify_queue_freeze (object, &property_notify_context); + g_object_notify_queue_add (object, nqueue, pspec); + g_object_notify_queue_thaw (object, nqueue); +} + /** * g_object_notify: * @object: a #GObject * @property_name: the name of a property installed on the class of @object. * * Emits a "notify" signal for the property @property_name on @object. + * + * When possible, eg. when signaling a property change from within the class + * that registered the property, you should use g_object_notify_by_pspec() + * instead. */ void g_object_notify (GObject *object, @@ -883,13 +898,66 @@ g_object_notify (GObject *object, G_OBJECT_TYPE_NAME (object), property_name); else - { - GObjectNotifyQueue *nqueue; - - nqueue = g_object_notify_queue_freeze (object, &property_notify_context); - g_object_notify_queue_add (object, nqueue, pspec); - g_object_notify_queue_thaw (object, nqueue); - } + g_object_notify_by_spec_internal (object, pspec); + g_object_unref (object); +} + +/** + * g_object_notify_by_pspec: + * @object: a #GObject + * @pspec: the #GParamSpec of a property installed on the class of @object. + * + * Emits a "notify" signal for the property specified by @pspec on @object. + * + * This function omits the property name lookup, hence it is faster than + * g_object_notify(). + * + * One way to avoid using g_object_notify() from within the + * class that registered the properties, and using g_object_notify_by_pspec() + * instead, is to store the GParamSpec used with + * g_object_class_install_property() inside a static array, e.g.: + * + *|[ + * enum + * { + * PROP_0, + * PROP_FOO, + * PROP_LAST + * }; + * + * static GParamSpec *properties[PROP_LAST]; + * + * static void + * my_object_class_init (MyObjectClass *klass) + * { + * properties[PROP_FOO] = g_param_spec_int ("foo", "Foo", "The foo", + * 0, 100, + * 50, + * G_PARAM_READWRITE); + * g_object_class_install_property (gobject_class, + * PROP_FOO, + * properties[PROP_FOO]); + * } + * ]| + * + * and then notify a change on the "foo" property with: + * + * |[ + * g_object_notify_by_pspec (self, properties[PROP_FOO]); + * ]| + * + * Since: 2.26 + */ +void +g_object_notify_by_pspec (GObject *object, + GParamSpec *pspec) +{ + + g_return_if_fail (G_IS_OBJECT (object)); + g_return_if_fail (G_IS_PARAM_SPEC (pspec)); + + g_object_ref (object); + g_object_notify_by_spec_internal (object, pspec); g_object_unref (object); } diff --git a/gobject/gobject.h b/gobject/gobject.h index 751e5f2f8..67072245f 100644 --- a/gobject/gobject.h +++ b/gobject/gobject.h @@ -435,6 +435,8 @@ void g_object_get_property (GObject *object, void g_object_freeze_notify (GObject *object); void g_object_notify (GObject *object, const gchar *property_name); +void g_object_notify_by_pspec (GObject *object, + GParamSpec *pspec); void g_object_thaw_notify (GObject *object); gboolean g_object_is_floating (gpointer object); gpointer g_object_ref_sink (gpointer object); diff --git a/gobject/gobject.symbols b/gobject/gobject.symbols index 871e7cd17..df9c39b54 100644 --- a/gobject/gobject.symbols +++ b/gobject/gobject.symbols @@ -141,6 +141,7 @@ g_object_new g_object_newv g_object_new_valist g_object_notify +g_object_notify_by_pspec g_object_is_floating g_object_ref_sink g_object_force_floating |