Spacetree: Getboundingbox

[karlton]

I've read that you got a getboundingbox method somewhere in your archives which allows determining the size of the rendered tree. I'd love to see this within the next release as i am devin' a visualization of a very large and dynamic dataset which defintely needs scrolling.

[taras]

I'm in the same boat as well. We need to be able to move the tree inside of the viewport.