[ Version ( since = "0.8" ) ]
public ActorBox get_allocation_box ()
Gets the layout box an actor has been assigned.
The allocation can only be assumed valid inside a paint method; anywhere else, it may be out-of-date.
An allocation does not incorporate the actor's scale or anchor point; those transformations do not affect layout, only rendering.
Do not call any of the clutter_actor_get_allocation_*() family of functions inside the implementation of the get_preferred_width
or get_preferred_height virtual functions.
| this |
A Actor |
| box |
the function fills this in with the actor's allocation |