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actor: Add children iteration methods

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Instead of requiring every consumer of the ClutterActor API that wishes
to iterate over the children of an actor to use the get_children()
method, we should provide an iteration API directly inside ClutterActor
itself.
This commit is contained in:
Emmanuele Bassi 2011-12-18 10:26:35 +00:00
parent 22259e0965
commit 8b430507b5
2 changed files with 97 additions and 7 deletions
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89
clutter/clutter-actor.c
View File

@ -9485,7 +9485,8 @@ insert_child_above (ClutterActor *self,
child->priv->prev_sibling = sibling;
child->priv->next_sibling = NULL;
sibling->priv->next_sibling = child;
if (sibling != NULL)
sibling->priv->next_sibling = child;
if (self->priv->last_child == sibling)
self->priv->last_child = child;
@ -9504,7 +9505,8 @@ insert_child_below (ClutterActor *self,
child->priv->prev_sibling = NULL;
child->priv->next_sibling = sibling;
sibling->priv->prev_sibling = child;
if (sibling != NULL)
sibling->priv->prev_sibling = child;
if (self->priv->first_child == sibling)
self->priv->first_child = child;
@ -15352,3 +15354,86 @@ clutter_actor_get_background_color (ClutterActor *self,
*color = self->priv->bg_color;
}
/**
* clutter_actor_get_previous_sibling:
* @self: a #ClutterActor
*
* Retrieves the sibling of @self that comes before it in the list
* of children of @self's parent.
*
* The returned pointer is only valid until the scene graph changes; it
* is guaranteed to remain the same during the paint sequence.
*
* Return value: (transfer none): a pointer to a #ClutterActor, or %NULL
*
* Since: 1.10
*/
ClutterActor *
clutter_actor_get_previous_sibling (ClutterActor *self)
{
g_return_val_if_fail (CLUTTER_IS_ACTOR (self), NULL);
return self->priv->prev_sibling;
}
/**
* clutter_actor_get_next_sibling:
* @self: a #ClutterActor
*
* Retrieves the sibling of @self that comes after it in the list
* of children of @self's parent.
*
* The returned pointer is only valid until the scene graph changes.
*
* Return value: (transfer none): a pointer to a #ClutterActor, or %NULL
*
* Since: 1.10
*/
ClutterActor *
clutter_actor_get_next_sibling (ClutterActor *self)
{
g_return_val_if_fail (CLUTTER_IS_ACTOR (self), NULL);
return self->priv->next_sibling;
}
/**
* clutter_actor_get_first_child:
* @self: a #ClutterActor
*
* Retrieves the first child of @self.
*
* The returned pointer is only valid until the scene graph changes.
*
* Return value: (transfer none): a pointer to a #ClutterActor, or %NULL
*
* Since: 1.10
*/
ClutterActor *
clutter_actor_get_first_child (ClutterActor *self)
{
g_return_val_if_fail (CLUTTER_IS_ACTOR (self), NULL);
return self->priv->first_child;
}
/**
* clutter_actor_get_last_child:
* @self: a #ClutterActor
*
* Retrieves the last child of @self.
*
* The returned pointer is only valid until the scene graph changes.
*
* Return value: (transfer none): a pointer to a #ClutterActor, or %NULL
*
* Since: 1.10
*/
ClutterActor *
clutter_actor_get_last_child (ClutterActor *self)
{
g_return_val_if_fail (CLUTTER_IS_ACTOR (self), NULL);
return self->priv->last_child;
}

15
clutter/clutter-actor.h
View File

@ -467,12 +467,11 @@ GList * clutter_actor_get_children (ClutterActor
gint clutter_actor_get_n_children (ClutterActor *self);
ClutterActor * clutter_actor_get_child_at_index (ClutterActor *self,
gint index_);
void clutter_actor_set_parent (ClutterActor *self,
ClutterActor *parent);
ClutterActor * clutter_actor_get_previous_sibling (ClutterActor *self);
ClutterActor * clutter_actor_get_next_sibling (ClutterActor *self);
ClutterActor * clutter_actor_get_first_child (ClutterActor *self);
ClutterActor * clutter_actor_get_last_child (ClutterActor *self);
ClutterActor * clutter_actor_get_parent (ClutterActor *self);
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);
@ -483,6 +482,12 @@ void clutter_actor_lower (ClutterActor
void clutter_actor_raise_top (ClutterActor *self);
void clutter_actor_lower_bottom (ClutterActor *self);
void clutter_actor_reparent (ClutterActor *self,
ClutterActor *new_parent);
void clutter_actor_set_parent (ClutterActor *self,
ClutterActor *parent);
void clutter_actor_unparent (ClutterActor *self);
void clutter_actor_push_internal (ClutterActor *self);
void clutter_actor_pop_internal (ClutterActor *self);