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actor: Update preferred size using constraints

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If an actor has any constraint that may affect its preferred size, then
it should query them when computing its preferred size.
This commit is contained in:
Emmanuele Bassi 2014-12-14 14:44:04 +00:00
parent 391f1d8dd4
commit 66d48bcca0
1 changed files with 54 additions and 0 deletions
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54
clutter/clutter-actor.c
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@ -9306,6 +9306,46 @@ _clutter_actor_get_cached_size_request (gfloat for_size,
return FALSE;
}
static void
clutter_actor_update_preferred_size_for_constraints (ClutterActor *self,
ClutterOrientation direction,
float for_size,
float *minimum_size,
float *natural_size)
{
ClutterActorPrivate *priv = self->priv;
const GList *constraints, *l;
if (priv->constraints == NULL)
return;
constraints = _clutter_meta_group_peek_metas (priv->constraints);
for (l = constraints; l != NULL; l = l->next)
{
ClutterConstraint *constraint = l->data;
ClutterActorMeta *meta = l->data;
if (!clutter_actor_meta_get_enabled (meta))
continue;
clutter_constraint_update_preferred_size (constraint, self,
direction,
for_size,
minimum_size,
natural_size);
CLUTTER_NOTE (LAYOUT,
"Preferred %s of '%s' after constraint '%s': "
"{ min:%.2f, nat:%.2f }",
direction == CLUTTER_ORIENTATION_HORIZONTAL
? "width"
: "height",
_clutter_actor_get_debug_name (self),
_clutter_actor_meta_get_debug_name (meta),
*minimum_size, *natural_size);
}
}
/**
* clutter_actor_get_preferred_width:
* @self: A #ClutterActor
@ -9404,6 +9444,13 @@ clutter_actor_get_preferred_width (ClutterActor *self,
&minimum_width,
&natural_width);
/* adjust for constraints */
clutter_actor_update_preferred_size_for_constraints (self,
CLUTTER_ORIENTATION_HORIZONTAL,
for_height,
&minimum_width,
&natural_width);
/* adjust for the margin */
minimum_width += (info->margin.left + info->margin.right);
natural_width += (info->margin.left + info->margin.right);
@ -9540,6 +9587,13 @@ clutter_actor_get_preferred_height (ClutterActor *self,
&minimum_height,
&natural_height);
/* adjust for constraints */
clutter_actor_update_preferred_size_for_constraints (self,
CLUTTER_ORIENTATION_VERTICAL,
for_width,
&minimum_height,
&natural_height);
/* adjust for margin */
minimum_height += (info->margin.top + info->margin.bottom);
natural_height += (info->margin.top + info->margin.bottom);