Extending a Region to create a JUNG Layout

[Jeffrey Guenther]

Hi,

I'm in the midst of exploring how I might port JUNG(
http://jung.sourceforge.net/index.html) to JavaFX. JUNG is a graph/layout
tool my lab uses for some of their data visualizations. With the release of
JavaFX 2, we've started building our prototypes in JavaFX.

Rather than use the JFXSwingPanel, I want to try modifying the JUNG to work
"natively" in JavaFX. In the long term, I'd like to see JUNG ported
completely to JavaFX using properties, CSS and the like.

I've built a quick demo (
https://gist.github.com/jrguenther/9d0c37329f9928a2b56e) and need help
going forward. I've been reading the docs and hitting google, but I think I
need more info.

Can someone point me to a detailed explanation of how to extend Region to
create my own layout?
In particular, how can I get a region to relayout it's children when it's
being resized?
When does a the region's parent call layoutChildren()?
If the height and width of the region are set to Double.MAX_VALUE
indicating the area can grow infinitely, how does the region know what size
to set itself to?

Thanks,
Jeff