Re: Update to theming document, important news for themers

I fixed some incorrect indenting and factual and nomenclature errors  
in your docs addition.

However, on further thought, I think OOTB themes that need backwards  
compatibility should just use:
render = ViewPageTemplateFile(...)

...just like we always have done (until Plone 3.1.x).

Doing it that way means the viewlet can't be overridden by a ZCML  
template= declaration on another layer, but what I just realized is  
that it can't anyway, because you can only have one theme-specific  
layer at a time.  So that concern is irrelevant.

Using 'index' is really only relevant for Plone itself and add-on  
products.

David

On Dec 9, 2008, at 5:02 PM, Veda Williams wrote:

> Hi All,
>
> After some poking around in a theme today, I realized that something  
> had
> changed in the 1.1.3 version of the plone.app.layout egg. The upshot  
> of this
> change meant that any new themes being developed with this newer egg  
> would
> break when installed on an older 3.x version of Plone.
>
> I've added a section called "3.1 Theme Compatibility Between  
> Different 3.x
> Versions of Plone" to this document to try to ensure best practices  
> moving
> forward:
>
> http://plone.org/documentation/tutorial/customizing-main-template-viewlets/o
> verriding-a-class-viewlet
>
> While this is a documentation update, it's also important for  
> themers to
> understand that something has changed under the covers. And, for the  
> OOTB
> project in particular, themers should strive for backwards  
> compatibility.
>
> If my notes here are unclear, please let me know.
>
> Thanks!
>
> - Veda
>
>
> -------------------
> Veda Williams, ONE/Northwest
> Web Developer / Skinner
>
>
>
>
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David Glick
Web Developer
ONE/Northwest

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