Ext Js GUI Designer and Rails

I am new to using Ext Js GUI Designer. I have gone through some components. Are there any good tutorials or demos to understand the开发者_如何学运维 functionality of the same, and which can be implemented in Ruby On Rails?

Ref # http://www.projectspace.nl/

Thanks in advance! :)

ExtJS is client-site JavaScript framework - it DOES NOT depend on server-side scripting language -> RoR is not a case

EDIT:

ExtJS Designer produce JavaScript code which need to be included in your pages...