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actor: add clutter_actor_contains()

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It is often useful to determine if one actor is an ancestor of
another. Add a method to do that.

http://bugzilla.openedhand.com/show_bug.cgi?id=2162

Signed-off-by: Emmanuele Bassi <ebassi@linux.intel.com>
This commit is contained in:
Dan Winship 2010-06-10 08:24:55 -04:00 committed by Emmanuele Bassi
parent d816acd834
commit f3f3b56742
3 changed files with 28 additions and 0 deletions
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25
clutter/clutter-actor.c
View File

@ -7568,6 +7568,31 @@ clutter_actor_reparent (ClutterActor *self,
clutter_actor_update_map_state (self, MAP_STATE_CHECK);
}
}
/**
* clutter_actor_contains:
* @self: A #ClutterActor
* @descendant: A #ClutterActor, possibly contained in @self
*
* Determines if @descendant is contained inside @self (either as an
* immediate child, or as a deeper descendant).
*
* Return value: whether @descendent is contained within @self
*
* Since: 1.4
*/
gboolean
clutter_actor_contains (ClutterActor *self,
ClutterActor *descendant)
{
g_return_val_if_fail (CLUTTER_IS_ACTOR (self), FALSE);
g_return_val_if_fail (CLUTTER_IS_ACTOR (descendant), FALSE);
while (descendant != NULL && descendant != self)
descendant = descendant->priv->parent_actor;
return descendant == self;
}
/**
* clutter_actor_raise:
* @self: A #ClutterActor

2
clutter/clutter-actor.h
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@ -458,6 +458,8 @@ ClutterActor * clutter_actor_get_parent (ClutterActor
void clutter_actor_reparent (ClutterActor *self,
ClutterActor *new_parent);
void clutter_actor_unparent (ClutterActor *self);
gboolean clutter_actor_contains (ClutterActor *self,
ClutterActor *descendant);
ClutterActor* clutter_actor_get_stage (ClutterActor *actor);
void clutter_actor_raise (ClutterActor *self,

1
doc/reference/clutter/clutter-sections.txt
View File

@ -355,6 +355,7 @@ clutter_actor_set_parent
clutter_actor_get_parent
clutter_actor_reparent
clutter_actor_unparent
clutter_actor_contains
clutter_actor_raise
clutter_actor_lower
clutter_actor_raise_top