We use capture to prevent mouse events from being seen by the components that normally get them. see the mouseUp handlers in the list classes. If we didn't do that, then if you mousedown and drag out of the list and then mouse up, the list would not see the mouseUp because it didn't happen to the list. Further the mouseUp handler on some other thing you happened to be over would be called. We can capture it and stop its propagation to the actual component so it never saw it. Actually we don't stop propagation because we've written the components in a way that is intelligent about whether it should respond, but others do use stopPropagation in this way.
________________________________ From: [email protected] [mailto:[EMAIL PROTECTED] On Behalf Of Sherif Abdou Sent: Tuesday, September 04, 2007 1:46 PM To: [email protected] Subject: Re: [flexcoders] useCapture(event) All right, so i got it to work added this in Application.application.addEventListener("Capture",ok); so that works fine, but when i do useCapture to true, then nothing works so what i am trying to get to is when would i actually set the useCapture to true. I just want to understand in what kind of scenario would i capture that event. if anyone could just do a quick example that would help me alot. Thanks ----- Original Message ---- From: Alex Harui <[EMAIL PROTECTED]> To: [email protected] Sent: Tuesday, September 4, 2007 3:16:14 PM Subject: RE: [flexcoders] useCapture(event) Because your canvas is listening to itself and not the application. ________________________________ From: [EMAIL PROTECTED] ups.com [mailto:flexcoders@ yahoogroups. com] On Behalf Of Sherif Abdou Sent: Tuesday, September 04, 2007 12:49 PM To: [EMAIL PROTECTED] ups.com Subject: Re: [flexcoders] useCapture(event) thanks for keeping up, sorry for all these stupid questions. ok how come this doesn't work, Thanks creationComplete= "initApp( )"> <mx:Metadata> [Event(name= "Capture" )] </mx:Metadata> <mx:Script> <![CDATA[ import mx.events.FlexEvent ; private function initApp():void{ this.dispatchEvent( new Event("Capture" ,true)); } ]]> </mx:Script> <-MXML for my other component--> <local:Test/> </mx:Application> ------------ --------- --------- --------- Here is the test <?xml version="1.0" encoding="utf- 8"?> creationComplete= "initApp( )"> <mx:Script> <![CDATA[ import mx.core.Application ; private function initApp():void{ //setting the useCapture here to true this.addEventListen er("Capture" ,ok,true) ; } private function ok(event:Event) :void{ trace('here' ); &nbs! p; } ]]> </mx:Script> </mx:Canvas> ----- Original Message ---- From: Alex Harui <[EMAIL PROTECTED] com> To: [EMAIL PROTECTED] ups.com Sent: Tuesday, September 4, 2007 2:05:51 PM Subject: RE: [flexcoders] useCapture(event) You have to listen to the app or higher up in order to capture so you'll have clean up issues regardless. You can use weak reference listeners if you can't clean up synchronously. ________________________________ From: [EMAIL PROTECTED] ups.com [mailto:flexcoders@ yahoogroups. com] On Behalf Of Sherif Abdou Sent: Tuesday, September 04, 2007 10:01 AM To: [EMAIL PROTECTED] ups.com Subject: Re: [flexcoders] useCapture(event) cause wouldn't that be tightly coupling it if i do this.Application. application. addEventListener (......). i thought this was bad but i am still new to flex i figured if i but a web service in the main application then when it is loaded, the subcomponent could capture that the service is ready and use that data from it ---Main Application( webService here) --Component -SubComponent( need info from the web service to populate its own), ---Component -subcomponent ---sub subcomponent( this also needs to get the webservice stuff); I hope i made sense ----- Original Message ---- From: Alex Harui <[EMAIL PROTECTED] com> To: [EMAIL PROTECTED] ups.com Sent: Tuesday, September 4, 2007 10:59:41 AM Subject: RE: [flexcoders] useCapture(event) yes, but why do it in capture phase, why not just listen to the app? Show us how you're doing it. ________________________________ From: [EMAIL PROTECTED] ups.com [mailto:flexcoders@ yahoogroups. com] On Behalf Of Sherif Abdou Sent: Tuesday, September 04, 2007 8:20 AM To: [EMAIL PROTECTED] ups.com Subject: Re: [flexcoders] useCapture(event) Thanks, i looked but i still can't get it to work. is it only used for mouse and focus events or say can i dispatch an event in the main application and have a sub componenet of that application capture that event Main Application- Dispatch "capturePhaseTest" ; -- Component --- SubComponent- -Listen for the "capturePhaseTest" that was dispatched by the application ----- Original Message ---- From: Alex Harui <[EMAIL PROTECTED] com> To: [EMAIL PROTECTED] ups.com Sent: Monday, September 3, 2007 10:37:28 PM Subject: RE: [flexcoders] useCapture(event) Look in our source code for stage.addEventListe ner, or in the FocusManager. ________________________________ From: [EMAIL PROTECTED] ups.com [mailto:flexcoders@ yahoogroups. com] On Behalf Of Sherif Abdou Sent: Sunday, September 02, 2007 4:44 PM To: [EMAIL PROTECTED] ups.com Subject: [flexcoders] useCapture(event) I am pretty puzzled to how the useCapture works in the addEventListner, i tried reading and i think i understand what it does but i never found an example of it in action or what it could be used for. so can anyone enlighten me ________________________________ Fussy? 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