This still wasn't working. I noticed while debugging that the method that was supposed to be listening to the 'descriptionChanged' was still never being called. I wondered if it had something to do with extending EventDispatcher, so I modified Toy to extend EventDispatcher and the listening method was still not being called. So I dug into EventDispatcher a bit and found another thread here that was exactly what I was looking for, titled 'Events and Non-Display Objects' :
http://tech.groups.yahoo.com/group/flexcoders/message/95122 The Singleton 'SystemEventManager' is much simpler and I used that to get it working. In fact I already had a similar class in my app for a different event. It seems like the Binding model quickly gets far too complicated when not dealing with top-level classes. Thanks again for your help Sam. Brian --- In flexcoders@yahoogroups.com, "Samuel R. Neff" <[EMAIL PROTECTED]> wrote: > > You'll need to add the Bindable metadata to both getDescription on Toy() as > well as CartItem() and within your CartItem class you need to listen for the > changed event within Toy and rebroadcast a new changed event from CartItem > when the contained Toy change it's description. > > HTH, > > Sam > > > public class Toy extends EventDispatcher { > [Bindable("descriptionChanged")] > public function getDescription():String { > return ""; // assume is overridden in child class, which also > broadcasts descriptionChanged > } > } > > public class CartItem extends EventDispatcher { > > private var _quantity:uint; > [Bindable("quantityChanged")] > public function get quantity():uint { > return _quantity; > } > public function set quantity(value:uint):void { > _quantity = value; > dispatchEvent(new Event("quantityChanged")); > dispatchEvent(new Event("descriptionChanged")); > } > > private var _toy:Toy; > [Bindable("toyChanged")] > public function get toy():Toy { > return _toy; > } > public function set toy(value:Toy):void { > if (_toy) { > _toy.removeEventListener("descriptionChanged", > rebroadcastDescriptionChanged); > } > _toy = value; > if (value) { > value.addEventListener("descriptionChanged", > rebroadcastDescriptionChanged); > } > dispatchEvent(new Event("toyChanged")); > } > > private function rebroadcastDescriptionChanged(event:Event):void { > dispatchEvent(new Event("descriptionChanged")); > } > > [Bindable("descriptionChanged")] > private function getDescription():String { > return quantity + " " + toy.getDescription(); > } > } > > > ------------------------------------------- > We're Hiring! Seeking a passionate developer to join our team building Flex > based products. Position is in the Washington D.C. metro area. If interested > contact [EMAIL PROTECTED] >
