Sorry, read the code incorrectly. Thought he was modifying the event properties. Modifying a property on the object is "ok" until you have two listeners both trying to set that property.
Events are really for notification, and notifications aren't really supposed to answer any other question than "that's (not) ok with me". The cancelable/preventDefault() mechanism is used for that, and propagation control is used to block notification. That's not to say I'm one of the strict-minded folks. I've definitely found scenarios where I would want to modify the payload of an event. Even though it disturbs our more strict-minded developers, passing a reference to a mutable object is sort of a token-passing behavior where listeners get to modify it as it goes around, but in the order of propagation. ________________________________ From: flexcoders@yahoogroups.com [mailto:[EMAIL PROTECTED] On Behalf Of Paul Andrews Sent: Tuesday, March 25, 2008 12:43 PM To: flexcoders@yahoogroups.com Subject: Re: [flexcoders] Can a Listener return a value ----- Original Message ----- From: Alex Harui <mailto:[EMAIL PROTECTED]> To: flexcoders@yahoogroups.com <mailto:flexcoders@yahoogroups.com> Sent: Tuesday, March 25, 2008 6:49 PM Subject: RE: [flexcoders] Can a Listener return a value That works, but is considered a "hack" in the strictest sense. The W3C Events spec indicates that event properties are read-only. Flash allows writing to them to make setup easier (constructor args are easy to mix up). Hmm. In this sense, surely event.target is a reference to an object, so really this has nothing to do with event properties at all? (it's just using the object reference to set a public attribute). Or are you referring to the lack of a cast - SomeClass(event.target).publicParameter ? Of course the listener could also call a callback method - SomeClass(event.target).aCallbackFn() . Paul ________________________________ From: flexcoders@yahoogroups.com <mailto:flexcoders@yahoogroups.com> [mailto:[EMAIL PROTECTED] On Behalf Of Mike Krotscheck Sent: Tuesday, March 25, 2008 11:34 AM To: flexcoders@yahoogroups.com Subject: RE: [flexcoders] Can a Listener return a value foo.addEventListener( Event.SomeEvent, responderEventHandler ); private function responderEventHandler(event:Event):void { event.target.publicParameter = "bar"; } Michael Krotscheck Senior Developer RESOURCE INTERACTIVE <http://www.resource.com/> www.resource.com <http://www.resource.com> [EMAIL PROTECTED] <mailto:[EMAIL PROTECTED]> ________________________________________________________________________ _______ We support privacy and confidentiality. Please delete this email if it was received in error. What's new :: Capitalize on the social web | The Open Brand, a new book by Kelly Mooney and Dr. Nita Rollins, available March 2008 | www.theopenbrand.com ________________________________ From: flexcoders@yahoogroups.com [mailto:[EMAIL PROTECTED] On Behalf Of markgoldin_2000 Sent: Tuesday, March 25, 2008 1:31 PM To: flexcoders@yahoogroups.com Subject: [flexcoders] Can a Listener return a value Can a Listener program return a value back to a program that set this listener up? Thanks
