static void
clutter_behaviour_opacity_set_property (GObject *gobject,
guint prop_id,
const GValue *value,
GParamSpec *pspec)
{
ClutterBehaviourOpacity *self = CLUTTER_BEHAVIOUR_OPACITY (gobject);
switch (prop_id)
{
case PROP_OPACITY_START:
clutter_behaviour_opacity_set_bounds (self,
g_value_get_uint (value),
self->priv->opacity_end);
break;
case PROP_OPACITY_END:
clutter_behaviour_opacity_set_bounds (self,
self->priv->opacity_start,
g_value_get_uint (value));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (gobject, prop_id, pspec);
break;
}
}
static VALUE
rbclt_behaviour_opacity_get_bounds (VALUE self)
{
ClutterBehaviourOpacity *behaviour
= CLUTTER_BEHAVIOUR_OPACITY (RVAL2GOBJ (self));
guint8 opacity_start, opacity_end;
clutter_behaviour_opacity_get_bounds (behaviour,
&opacity_start, &opacity_end);
return rb_ary_new3 (2, INT2NUM (opacity_start), INT2NUM (opacity_end));
}
static VALUE
rbclt_behaviour_opacity_set_bounds (VALUE self,
VALUE opacity_start,
VALUE opacity_end)
{
ClutterBehaviourOpacity *behaviour
= CLUTTER_BEHAVIOUR_OPACITY (RVAL2GOBJ (self));
clutter_behaviour_opacity_set_bounds (behaviour,
rbclt_num_to_guint8 (opacity_start),
rbclt_num_to_guint8 (opacity_end));
return self;
}
static void
clutter_behaviour_alpha_notify (ClutterBehaviour *behave,
gdouble alpha_value)
{
ClutterBehaviourOpacityPrivate *priv;
guint8 opacity;
priv = CLUTTER_BEHAVIOUR_OPACITY (behave)->priv;
opacity = alpha_value
* (priv->opacity_end - priv->opacity_start)
+ priv->opacity_start;
CLUTTER_NOTE (BEHAVIOUR, "alpha: %.4f, opacity: %u",
alpha_value,
opacity);
clutter_behaviour_actors_foreach (behave,
alpha_notify_foreach,
GUINT_TO_POINTER ((guint) opacity));
}
