Enumeration for size negotiation resize policies.
public enum ResizePolicyType
One dimension is dependent on the other.
Size is to fill up to the actor's parent's bounds. Aspect ratio is not maintained.
The size will adjust to wrap around all children.
Size is fixed as set by SetSize.
The actors size will be ( ParentSize + SizeRelativeToParentFactor ).
The actors size will be ( ParentSize * SizeRelativeToParentFactor ).
The size will be assigned to the actor.
Size is to use the actor's natural size.