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Re: XML events: One event handler, multiple events

From: Erik Bruchez <ebruchez@orbeon.com>
Date: Mon, 27 Aug 2007 18:10:45 +0200
Message-ID: <46D2F785.8030808@orbeon.com>
To: Mark Birbeck <mark.birbeck@x-port.net>, Shane McCarron <shane@aptest.com>
CC: "Forms WG (new)" <public-forms@w3.org>

Mark, Shane:

I have not received acknowledgment of this email. Could you please 
respond at lest to the part about the process to follow?

Thanks,

-Erik

Erik Bruchez wrote:
> 
> Mark, Shane:
> 
> Following a discussion in this thread [1], I have an action item [2]
> from the XForms Working Group to contact you to suggest an enhancement
> to the ev:event attribute in order to allow registering an event
> handler for multiple events without resorting to using an additional
> <ev:listener> element.
> 
> As far as we could tell, the only way to do this purely with the XML
> syntax today is to write (here in the context of XForms):
> 
>    <xf:action ev:event="some-event" id="handler">
>      ...
>    </xf:action>
>    <ev:listener event="some-other-event" handler="#handler"/>
> 
> The suggestion is to enhance the ev:event attribute to support a list
> of events rather than a single event. You would then write instead:
> 
>    <xf:action ev:event="some-event some-other-event">
>      ...
>    </xf:action>
> 
> This would be a much more concise syntax which would not require form
> authors to learn ev:listener. The result is also quite easy to read.
> 
> There are obviously precedents for using lists of space-separated
> names, in particular the following two come to mind immediately:
> 
> * List of CSS classes in HTML @class attributes
> * List of XML schemas on xforms:model/@schema
> 
> Note that [1] discusses a slightly more complex case where the event
> handler is attached to two different observers. The solution above
> would probably not work in this case, although a similar suggestion
> could be made for the ev:observer attribute:
> 
>    <xf:action ev:event="some-event" ev:observer="observer1 observer2">
>      ...
>    </xf:action>
> 
> What is the best way to have this suggestion duly taken into account
> by the people in charge of XML Events? Is this email sufficient?
> 
> Thanks,
> 
> -Erik
> 
> [1] http://lists.w3.org/Archives/Public/www-forms/2007Apr/0042.html
> [2] 
> http://lists.w3.org/Archives/Public/public-forms/2007May/att-0058/20070516-2.html#ACTION5 
> 
> 


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Received on Monday, 27 August 2007 16:10:45 UTC

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