Re: [flexcoders] Handler functions convention
On 5 April 2010 19:25, Gordon Smith wrote: ... > The attribute "value" is code that becomes the body of the handler. Cool. This is great to know! Thanks, Gabriel -- gabriel montagné láscaris comneno http://rojored.com +44 (0) 7500 709 209
RE: [flexcoders] Handler functions convention
> if you subscribe to the event using ActionScript,
> not the mxml handler sugar, then you'll always get the event.
An MXML event attribute like click="trace(event.target)" just autogenerates an
event handler that looks like
function clickHandler(event:MouseEvent):void
{
trace(event.target);
}
The attribute "value" is code that becomes the body of the handler.
Gordon Smith
Adobe Flex SDK Team
From: flexcoders@yahoogroups.com [mailto:flexcod...@yahoogroups.com] On Behalf
Of Mike Chang
Sent: Saturday, April 03, 2010 10:47 AM
To: flexcoders@yahoogroups.com
Subject: Re: [flexcoders] Handler functions convention
Thanks Gabriel.
Mike
2010/4/3 gabriel montagné mailto:gabr...@rojored.com>>
On 03/04/2010, Mike Chang mailto:mikecc%40gmail.com>> wrote:
> I noticed in many examples on the web handler functions mostly have a
> parameter event, even though the event isn't used (such as even.target). I'm
> wondering if there's a reason for this convention.
I'd say it's up to you, but if you subscribe to the event using ActionScript,
not the mxml handler sugar, then you'll always get the event.
> I have to pass a null in case it isn't triggered by the event, which seems
> pretty cumbersome.
Perhaps you could use defaults in the handler, something like
login_clickHandler(event:MouseEvent = null)
Gabriel
--
gabriel montagné láscaris comneno
http://rojored.com
+44 (0) 7500 709 209
Re: [flexcoders] Handler functions convention
Thanks Gabriel. Mike 2010/4/3 gabriel montagné > > > On 03/04/2010, Mike Chang > wrote: > > > I noticed in many examples on the web handler functions mostly have a > > parameter event, even though the event isn't used (such as even.target). > I'm > > wondering if there's a reason for this convention. > > I'd say it's up to you, but if you subscribe to the event using > ActionScript, > not the mxml handler sugar, then you'll always get the event. > > > > I have to pass a null in case it isn't triggered by the event, which > seems > > pretty cumbersome. > > Perhaps you could use defaults in the handler, something like > > login_clickHandler(event:MouseEvent = null) > > Gabriel > > -- > gabriel montagné láscaris comneno > http://rojored.com > +44 (0) 7500 709 209 > > >
Re: [flexcoders] Handler functions convention
On 03/04/2010, Mike Chang wrote: > I noticed in many examples on the web handler functions mostly have a > parameter event, even though the event isn't used (such as even.target). I'm > wondering if there's a reason for this convention. I'd say it's up to you, but if you subscribe to the event using ActionScript, not the mxml handler sugar, then you'll always get the event. > I have to pass a null in case it isn't triggered by the event, which seems > pretty cumbersome. Perhaps you could use defaults in the handler, something like login_clickHandler(event:MouseEvent = null) Gabriel -- gabriel montagné láscaris comneno http://rojored.com +44 (0) 7500 709 209
