static ClutterLayoutMeta * layout_manager_real_create_child_meta (ClutterLayoutManager *manager, ClutterContainer *container, ClutterActor *actor) { ClutterLayoutManagerClass *klass; GType meta_type; klass = CLUTTER_LAYOUT_MANAGER_GET_CLASS (manager); meta_type = klass->get_child_meta_type (manager); /* provide a default implementation to reduce common code */ if (meta_type != G_TYPE_INVALID) { g_assert (g_type_is_a (meta_type, CLUTTER_TYPE_LAYOUT_META)); return g_object_new (meta_type, "manager", manager, "container", container, "actor", actor, NULL); } return NULL; }
static inline ClutterLayoutMeta * create_child_meta (ClutterLayoutManager *manager, ClutterContainer *container, ClutterActor *actor) { ClutterLayoutManagerClass *klass; klass = CLUTTER_LAYOUT_MANAGER_GET_CLASS (manager); if (klass->get_child_meta_type (manager) != G_TYPE_INVALID) return klass->create_child_meta (manager, container, actor); return NULL; }
static inline ClutterLayoutMeta * create_child_meta (ClutterLayoutManager *manager, ClutterContainer *container, ClutterActor *actor) { ClutterLayoutManagerClass *klass; ClutterLayoutMeta *meta = NULL; layout_manager_freeze_layout_change (manager); klass = CLUTTER_LAYOUT_MANAGER_GET_CLASS (manager); if (klass->get_child_meta_type (manager) != G_TYPE_INVALID) meta = klass->create_child_meta (manager, container, actor); layout_manager_thaw_layout_change (manager); return meta; }
/** * clutter_layout_manager_find_child_property: * @manager: a #ClutterLayoutManager * @name: the name of the property * * Retrieves the #GParamSpec for the layout property @name inside * the #ClutterLayoutMeta sub-class used by @manager * * Return value: (transfer none): a #GParamSpec describing the property, * or %NULL if no property with that name exists. The returned * #GParamSpec is owned by the layout manager and should not be * modified or freed * * Since: 1.2 */ GParamSpec * clutter_layout_manager_find_child_property (ClutterLayoutManager *manager, const gchar *name) { ClutterLayoutManagerClass *klass; GObjectClass *meta_klass; GParamSpec *pspec; GType meta_type; klass = CLUTTER_LAYOUT_MANAGER_GET_CLASS (manager); meta_type = klass->get_child_meta_type (manager); if (meta_type == G_TYPE_INVALID) return NULL; meta_klass = g_type_class_ref (meta_type); pspec = g_object_class_find_property (meta_klass, name); g_type_class_unref (meta_klass); return pspec; }