How do I create a Treemap and depict it through flex?

So basically what I'm trying to do is make something like this: http://store.kapit.biz/demo/treemap/prod/index.html#

I've searched long and hard to find a site that would show me some pseudocode (at least) or an algorithm as to how to implement this type of application. But everything I find are only applications that take in data and do all the work for me to create the graph.开发者_如何学编程 I need to actually create it for myself, just a simple one for now. Does anyone know where I can find this? What I want it to do is take data from a database and use it to create the treemap, then express it in a GUI like in the link above. If any specifics are needed I can provide it. I'm trying to do this in Flash Builder using Flex and using ColdFusion as the backend. Thanks!

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Check this out

Axiis is a open source library based on Degrafa that enables you to make complex data visualizations.

Cheers