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actor: Add :first-child and :last-child properties

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Toolkits tracking first and last children of a ClutterActor can use
these properties to get notification of hierarchy changes.
This commit is contained in:
Emmanuele Bassi 2012-01-17 18:46:41 +00:00
parent bb8abe832e
commit f7d9eab36d
1 changed files with 49 additions and 0 deletions
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49
clutter/clutter-actor.c
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@ -580,6 +580,9 @@ enum
PROP_BACKGROUND_COLOR,
PROP_BACKGROUND_COLOR_SET,
PROP_FIRST_CHILD,
PROP_LAST_CHILD,
PROP_LAST
};
@ -4218,6 +4221,14 @@ clutter_actor_get_property (GObject *object,
g_value_set_boxed (value, &priv->bg_color);
break;
case PROP_FIRST_CHILD:
g_value_set_object (value, priv->first_child);
break;
case PROP_LAST_CHILD:
g_value_set_object (value, priv->last_child);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
@ -5388,6 +5399,34 @@ clutter_actor_class_init (ClutterActorClass *klass)
CLUTTER_COLOR_Transparent,
CLUTTER_PARAM_READWRITE);
/**
* ClutterActor:first-child:
*
* The actor's first child.
*
* Since: 1.10
*/
obj_props[PROP_FIRST_CHILD] =
g_param_spec_object ("first-child",
P_("First Child"),
P_("The actor's first child"),
CLUTTER_TYPE_ACTOR,
CLUTTER_PARAM_READABLE);
/**
* ClutterActor:last-child:
*
* The actor's last child.
*
* Since: 1.10
*/
obj_props[PROP_LAST_CHILD] =
g_param_spec_object ("last-child",
P_("Last Child"),
P_("The actor's last child"),
CLUTTER_TYPE_ACTOR,
CLUTTER_PARAM_READABLE);
g_object_class_install_properties (object_class, PROP_LAST, obj_props);
/**
@ -9550,6 +9589,7 @@ clutter_actor_add_child_internal (ClutterActor *self,
{
ClutterTextDirection text_dir;
gboolean create_meta, emit_parent_set, emit_actor_added, check_state;
ClutterActor *old_first_child, *old_last_child;
if (child->priv->parent != NULL)
{
@ -9575,6 +9615,9 @@ clutter_actor_add_child_internal (ClutterActor *self,
emit_actor_added = (flags & ADD_CHILD_EMIT_ACTOR_ADDED) != 0;
check_state = (flags & ADD_CHILD_CHECK_STATE) != 0;
old_first_child = self->priv->first_child;
old_last_child = self->priv->last_child;
if (create_meta)
clutter_container_create_child_meta (CLUTTER_CONTAINER (self), child);
@ -9634,6 +9677,12 @@ clutter_actor_add_child_internal (ClutterActor *self,
if (emit_actor_added)
g_signal_emit_by_name (self, "actor-added", child);
if (old_first_child != self->priv->first_child)
g_object_notify_by_pspec (G_OBJECT (self), obj_props[PROP_FIRST_CHILD]);
if (old_last_child != self->priv->last_child)
g_object_notify_by_pspec (G_OBJECT (self), obj_props[PROP_LAST_CHILD]);
}
/**