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container: Implement ::child-notify

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Since we added child properties to the Container interface we made a
guarantee that the ::child-notify signal would be emitted whenever a
property was set using clutter_container_child_set*().

We were lying.

The child_notify virtual function was not implemented, and the signal
was never emitted.

We also used a G_LIKELY() macro while checking for non-NULL on a
function pointer that was by default set to NULL, thus making the
setting of child properties far less efficient than needed.
This commit is contained in:
Emmanuele Bassi 2010-09-30 13:11:05 +01:00
parent 18ff73c244
commit fc344fb93a
1 changed files with 18 additions and 3 deletions
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21
clutter/clutter-container.c
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@ -92,6 +92,9 @@ static void create_child_meta (ClutterContainer *container,
ClutterActor *actor);
static void destroy_child_meta (ClutterContainer *container,
ClutterActor *actor);
static void child_notify (ClutterContainer *container,
ClutterActor *child,
GParamSpec *pspec);
static void
clutter_container_base_init (gpointer g_iface)
@ -150,7 +153,8 @@ clutter_container_base_init (gpointer g_iface)
/**
* ClutterContainer::child-notify:
* @container: the container which received the signal
* @actor: the child that has had a property set.
* @actor: the child that has had a property set
* @pspec: the #GParamSpec of the property set
*
* The ::child-notify signal is emitted each time a property is
* being set through the clutter_container_child_set() and
@ -161,7 +165,7 @@ clutter_container_base_init (gpointer g_iface)
container_signals[CHILD_NOTIFY] =
g_signal_new (I_("child-notify"),
iface_type,
G_SIGNAL_RUN_FIRST,
G_SIGNAL_RUN_FIRST | G_SIGNAL_DETAILED,
G_STRUCT_OFFSET (ClutterContainerIface, child_notify),
NULL, NULL,
_clutter_marshal_VOID__OBJECT_OBJECT_PARAM,
@ -172,6 +176,7 @@ clutter_container_base_init (gpointer g_iface)
iface->create_child_meta = create_child_meta;
iface->destroy_child_meta = destroy_child_meta;
iface->get_child_meta = get_child_meta;
iface->child_notify = child_notify;
}
}
@ -922,6 +927,16 @@ clutter_container_class_list_child_properties (GObjectClass *klass,
return retval;
}
static void
child_notify (ClutterContainer *container,
ClutterActor *actor,
GParamSpec *pspec)
{
g_signal_emit (container, container_signals[CHILD_NOTIFY],
g_quark_from_string (pspec->name),
actor, pspec);
}
static inline void
container_set_child_property (ClutterContainer *container,
ClutterActor *actor,
@ -935,7 +950,7 @@ container_set_child_property (ClutterContainer *container,
g_object_set_property (G_OBJECT (data), pspec->name, value);
iface = CLUTTER_CONTAINER_GET_IFACE (container);
if (G_LIKELY (iface->child_notify))
if (iface->child_notify != NULL)
iface->child_notify (container, actor, pspec);
}