On Oct 28, 2011, at 2:38 AM, Malthe Borch wrote:

> On 27 October 2011 23:02, Mark Erbaugh <[email protected]> wrote:
>> In the Zope2 Book (documentation), section 27.22.1 mentions special handling 
>> of the tal:condition operation when ued with the checked or selected 
>> attributes which makes it easier to pass an initial value to a checkbox, 
>> radio or select control.  This behavior is not mentioned (at least I didn't 
>> find it) in the Chameleon 2.0 documentation, but it appears to work in my 
>> Pyramid / Chameleon app.
> 
> It's available in 2.0, but not configured by default.
> 
> It needs the following attributes set on the template class (or instance):
> 
>    literal_false = True
>    boolean_attributes = set(["checked", "selected", ...])
> 
> The combination of both gives you the ZPT behavior.
> 
> The attributes are documented here:
> 
>    http://pagetemplates.org/docs/latest/library.html#chameleon.PageTemplate
> 
> \malthe

Thank you.  I think the reason that it worked for me without the above code is 
that I'm using HTML5 where the handling of checked and selected is more relaxed.

Mark

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