It’s pretty nice, with good examples of the LocalEventMap, etc. He’s built it using the Presentation Model design pattern which seems to be a natural fit to both Flex and Mate.

Paul Williams of Adobe has a series of articles on various design patterns including Presentation Model.

And of course Martin Fowler has some thoughts on the Presentation Model, aka Application Model pattern.

It could be a nice starting point for developing multiple document applications. And the Presentation Model pattern looks like it would provide some nice benefits, keeping the views nice and simple and making them a lot easier to test.

This project also has excellent documentation and about the only info I can find on LocalEventMaps.

I’d come across many references to adding a cross domain policy to a web server, but this is the first full explanation of the security sandbox that made sense to me. Following this, I added:

-use-network=false

To the custom compiler line in the project preferences and all is well. Here’s the link with a great explanation:

http://blogs.adobe.com/flexdoc/2008/06/the_security_sandbox_in_flex_b.html