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bind-constraint: Update the preferred size

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Bind the preferred size of an actor using a BindConstraint to the
preferred size of the source of the constraint, depending on the
coordinate of the constraint.
This commit is contained in:
Emmanuele Bassi 2014-12-14 14:54:35 +00:00
parent 66d48bcca0
commit fcc67e99bc
1 changed files with 51 additions and 0 deletions
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51
clutter/clutter-bind-constraint.c
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@ -146,6 +146,55 @@ source_destroyed (ClutterActor *actor,
bind->source = NULL;
}
static void
clutter_bind_constraint_update_preferred_size (ClutterConstraint *constraint,
ClutterActor *actor,
ClutterOrientation direction,
float for_size,
float *minimum_size,
float *natural_size)
{
ClutterBindConstraint *bind = CLUTTER_BIND_CONSTRAINT (constraint);
float source_min, source_nat;
if (bind->source == NULL)
return;
/* only these bindings affect the preferred size */
if (!(bind->coordinate == CLUTTER_BIND_WIDTH ||
bind->coordinate == CLUTTER_BIND_HEIGHT ||
bind->coordinate == CLUTTER_BIND_SIZE ||
bind->coordinate == CLUTTER_BIND_ALL))
return;
switch (direction)
{
case CLUTTER_ORIENTATION_HORIZONTAL:
if (bind->coordinate != CLUTTER_BIND_HEIGHT)
{
clutter_actor_get_preferred_width (bind->source, for_size,
&source_min,
&source_nat);
*minimum_size = source_min;
*natural_size = source_nat;
}
break;
case CLUTTER_ORIENTATION_VERTICAL:
if (bind->coordinate != CLUTTER_BIND_WIDTH)
{
clutter_actor_get_preferred_height (bind->source, for_size,
&source_min,
&source_nat);
*minimum_size = source_min;
*natural_size = source_nat;
}
break;
}
}
static void
clutter_bind_constraint_update_allocation (ClutterConstraint *constraint,
ClutterActor *actor,
@ -328,6 +377,8 @@ clutter_bind_constraint_class_init (ClutterBindConstraintClass *klass)
meta_class->set_actor = clutter_bind_constraint_set_actor;
constraint_class->update_allocation = clutter_bind_constraint_update_allocation;
constraint_class->update_preferred_size = clutter_bind_constraint_update_preferred_size;
/**
* ClutterBindConstraint:source:
*