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From Sylvain Wallez <>
Subject Re: [cforms] fi:validation-errors in AJAX mode
Date Thu, 04 Aug 2005 14:54:21 GMT
Jason Johnston wrote:

> Sylvain Wallez wrote:
>> Jason Johnston wrote:
>>> The only AJAX-related code I can find in the Widget (formmodel) 
>>> classes is in AbstractWidget.generateSaxFragment(), where it creates 
>>> an fi:placeholder if the widget is invisible.  It seems odd to me to 
>>> have this here, perhaps it would better belong in the template layer 
>>> as well.
>> Hmm... the idea behind this is to ensure that the view layer, 
>> whatever it is, has no possibility to produce the XML representation 
>> of a widget if that widget's state prevents it to be displayed.
> And that would still be the case, but the production of fi:placeholder 
> (which is an AJAX-only implementation detail, right?) would be moved 
> into the view layer.  Keep the "if", move the "else".

Yes, you're right, the placeholder is only useful when in Ajax mode. Now 
having it in at the widget level was a way to avoid to re-test again the 
widget's state in the template, which requires to crawl up the ancestors 
to combine their states. Efficiency for the server and lazyness for the 
code writer ;-)


Sylvain Wallez                        Anyware Technologies
Apache Software Foundation Member     Research & Technology Director

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