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actor: Ask the LayoutManager to compute the expansion flags

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If an actor has a layout manager, we want to involve the delegate object
into the lazy computation of the expansion flags state.
This commit is contained in:
Emmanuele Bassi 2011-12-20 18:40:11 +00:00 committed by Emmanuele Bassi
parent 2956116561
commit 508f09f0a0
1 changed files with 35 additions and 0 deletions
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35
clutter/clutter-actor.c
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@ -14748,6 +14748,8 @@ typedef struct _ExpandClosure
{
gboolean x_expand;
gboolean y_expand;
ClutterLayoutManager *layout_manager;
ClutterContainer *container;
} ExpandClosure;
static gboolean
@ -14756,9 +14758,35 @@ foreach_compute_expand (ClutterActor *child,
{
ExpandClosure *data = data_;
/* if there is a layout manager, we ask it to influence the result
* in case it has layout properties that map to [xy]-expand
*/
if (data->layout_manager != NULL)
{
ClutterLayoutManagerClass *manager_class;
gboolean x_expand, y_expand;
x_expand = y_expand = FALSE;
manager_class = CLUTTER_LAYOUT_MANAGER_GET_CLASS (data->layout_manager);
manager_class->compute_expand (data->layout_manager,
data->container,
child,
&x_expand,
&y_expand);
data->x_expand = data->x_expand || x_expand;
data->y_expand = data->y_expand || y_expand;
}
data->x_expand = data->x_expand || clutter_actor_needs_x_expand (child);
data->y_expand = data->y_expand || clutter_actor_needs_y_expand (child);
/* we stop recursing as soon as we know that we are set to expand
* in both directions
*/
if (data->x_expand && data->y_expand)
return FALSE;
return TRUE;
}
@ -14771,6 +14799,8 @@ clutter_actor_compute_expand (ClutterActor *self,
data.x_expand = FALSE;
data.y_expand = FALSE;
data.layout_manager = self->priv->layout_manager;
data.container = CLUTTER_CONTAINER (self);
_clutter_actor_foreach_child (self,
foreach_compute_expand,
@ -14820,6 +14850,11 @@ clutter_actor_update_effective_expand (ClutterActor *self)
priv->needs_compute_expand = FALSE;
priv->x_expand_effective = x_expand != FALSE;
priv->y_expand_effective = y_expand != FALSE;
g_debug ("Actor %s expand effective - x:%s, y:%s",
_clutter_actor_get_debug_name (self),
priv->x_expand_effective ? "Y" : "N",
priv->y_expand_effective ? "Y" : "N");
}
/**