Layout Management System

A flexible system for managing the layout of widgets in curtains. My initial idea is to use the container class as the "layout container" and the control class as the "layout elements".

Should support these layout methods:

single-item (a single child element stretches to fit the dimensions of its container)

box-layout (space is divided among elements in one dimension; all elements are stretched in the other)

stack-layout (elements are stacked against each other in one dimension(they retain their natural values for this); all elements are stretched in the other)

box-stack-hybrid (a mixture of the behavior of box and stack layouts (for instance: one dimension uses box, the other uses stack, or both use stack etc.))