The #ClutterAlpha object used to drive this behaviour. A #ClutterAlpha
object binds a #ClutterTimeline and a function which computes a value
(the "alpha") depending on the time. Each time the alpha value changes
the alpha-notify virtual function is called.
The #ClutterAlpha object used to drive this behaviour. A #ClutterAlpha object binds a #ClutterTimeline and a function which computes a value (the "alpha") depending on the time. Each time the alpha value changes the alpha-notify virtual function is called.