Sets the actor's size request in pixels.
This overrides any "normal" size request the actor would have. For example a text actor might normally request the size of the text; this function would force a specific size instead.
If width and/or height are -1 the actor will use its "normal" size request instead of overriding it, i.e. you
can "unset" the size with -1.
This function sets or unsets both the minimum and natural size.
| this |
A Actor |
| width |
New width of actor in pixels, or -1 |
| height |
New height of actor in pixels, or -1 |