OK, here's a little app to demonstrate the problem. I'm sure the answer is obvious, but... can someone point it out?
The Application and the Canvas go in the src folder; the custom event (FoodEvent) goes in an 'events' folder inside src. I made the canvas because I wanted the event to be heard in a different component from the Application itself. <?xml version="1.0" encoding="utf-8"?> <mx:Application xmlns:mx="http://www.adobe.com/2006/mxml"; layout="horizontal" xmlns:food = "*"> <mx:Script> <![CDATA[ import events.FoodEvent; [Bindable] public var food_supply:Array = [{label:"Pizza Pie", data:"Pizza"},{label:"Buffalo Wings", data:"Wings"}]; private function onFoodCBChange():void { var item:Object = foodCB.selectedItem; if(item == null) return; var event:FoodEvent = new FoodEvent(FoodEvent.FOOD_EVENT); event.selectedItemFromFoodCB = item.data; this.dispatchEvent(event); } ]]> </mx:Script> <mx:Canvas height="167" width="200"> <mx:ComboBox x="40" y="20" dataProvider="{food_supply}" id="foodCB" textAlign="left" change="onFoodCBChange()"/> </mx:Canvas> <food:testCanvas /> </mx:Application> <?xml version="1.0" encoding="utf-8"?> <mx:Canvas xmlns:mx="http://www.adobe.com/2006/mxml"; creationComplete="this.addEventListener(FoodEvent.FOOD_EVENT, foodEventhandler)" borderStyle="solid" borderColor="red" borderThickness="3" x="300" y="300" width="200" height="200"> <mx:Script> <![CDATA[ import events.FoodEvent; import mx.controls.Alert; private function foodEventhandler(e:FoodEvent):void { Alert.show(e.selectedItemFromFoodCB); } ]]> </mx:Script> </mx:Canvas> package events { import flash.events.Event; public class FoodEvent extends Event { public static const FOOD_EVENT:String = 'food.event'; public var selectedItemFromFoodCB:String; //Used to pass selection value public function FoodEvent(type:String, bubbles:Boolean=false, cancelable:Boolean=false) { super(type, bubbles, cancelable); } } } --- In [email protected], "Tracy Spratt" <tspr...@...> wrote: > > It will depend on where and how the listener is declared. > CreationComplete fires at different times for different components. As > I recall, it is bottom up, so creationComplete for a parent will fire > after creationComplete for a child. If the parent creationComplete > handler declares the listener, then there would be a problem. > > > > This should only be an issue on start-up. Certainly the listener would > be available when the app was ready to receive user input, via ComboBox > or button click, as the original poster noticed. > > > > Remember that events flow through the DOM. It is possible for a > dispatched event to "miss" a component. Pop-ups are a particular > problem. > > > > Tracy > > > > ________________________________ > > From: [email protected] [mailto:[email protected]] On > Behalf Of stldvd > Sent: Monday, January 05, 2009 4:48 PM > To: [email protected] > Subject: [flexcoders] Re: why I can not dispatchEvent with > creationComplete? > > > > I'm having a similar issue. Event is dispatched (I can step through > code and see it) but the event listener is never hearing it, and so > the listener function is never being fired. > > How does one tell if the listener is ready or not? If you add the > listener on the creationcomplete or initialize event of an mxml > component, it should in theory be ready to fire, for the duration of > the app, right? And if you're dispatching a custom event when an item > is selected in a combobox, it should certainly work. What could be the > reason for a 'deaf' event listener? :) > > -- David > > --- In [email protected] <mailto:flexcoders%40yahoogroups.com> > , "Tracy Spratt" <tspratt@> wrote: > > > > Perhaps the listener is not yet ready when the canvas creationComplete > > fires? > > > > Tracy > > > > > > > > ________________________________ > > > > From: [email protected] <mailto:flexcoders%40yahoogroups.com> > [mailto:[email protected] <mailto:flexcoders%40yahoogroups.com> > ] On > > Behalf Of markflex2007 > > Sent: Monday, January 05, 2009 2:08 PM > > To: [email protected] <mailto:flexcoders%40yahoogroups.com> > > Subject: [flexcoders] why I can not dispatchEvent with > creationComplete? > > > > > > > > I try the following code, But I can not dispatchEvent. > > > > <mx:Canvas xmlns:mx="http://www.adobe.com/2006/mxml > <http://www.adobe.com/2006/mxml> > > <http://www.adobe.com/2006/mxml <http://www.adobe.com/2006/mxml> > " > > creationComplete="justLogin()" > > > <mx:Metadata> > > [Event(name="loginEvent", type="flash.events.Event")] > > </mx:Metadata> > > <mx:Script> > > <![CDATA[ > > > > > > private function justLogin():void{ > > > > dispatchEvent(new Event("loginEvent", false)); > > > > } > > ]]> > > </mx:Script> > > > > </mx:Canvas> > > > > I can dispatchEvent with button click, please let me know how to > > automatic dispatchEvent in page start. > > > > Thanks > > > > Mark > > >
