This document discusses Rich Internet Applications and Flex. It covers creating custom classes like Product and ShoppingCartItem classes. It also discusses databinding using the [Bindable] metadata tag, how Flex writes code on behalf of the developer, and how binding works through event dispatching and listening. It further explains how collections like ArrayCollection can dispatch events to support databinding, and covers sorting, filtering, and cursors on collections.

1. Rich Internet Applications and Flex
Vijay Kalangi

2. • Create your custom classes
• Value objects - store/retrieve data

3. • Create a Product Class
• static factory
• Populate Product instance with data
• ShoppingCartItem Class
• ShoppingCart Class
• Loop through Array
• Adding and updating items in ShoppingCart

4. • [Bindable] and {}; redo in actionscript
• Flex writes code on behalf of you when you use these constructs
• Binding is just event dispatching and listening behind scenes
• For databinding to work properly, objects must be able to dispatch
events when something changes
• Then what about [Bindable] in Product?
• How about Array? Source code NOT inside your project

5. • ArrayCollection and ArrayList, XMLListCollection Proxy for Array and
XMLList and they can dispatch events!
• Sorting an ArrayCollection - pg 190
• Cursors
• remove / find
• Filters