TLF Autosize

I want a ContainerController to autosize.  Like setting TextField.autosize, so that the textfield expands to fit all the text it holds (without scrolling or truncating the text).  How do I do this?

If I call ContainerController.setCompositionSize(...,calculateHeight()); - will that do it?  Is there a way to update this automatically? (apart from the obvious way using an event handler).

I know that FTETextField supports autosize, but I never use mx. flex classes in my own pure actionscript projects.

(What I'm doing next in e2publish is adding tables - and rows will expand to accommodate text in cells.  http://www.e2easy.co.cc/e2publish.html )