[silva-dev] Main Layout, Content Provider and Viewlet

[Jonathan Bowlas]

Many thanks Sylvain, I thought it would be something like this. I'll
let you know how I get on.

Cheers

Jon

On 7 June 2011 12:31, Sylvain Viollon <sylvain at infrae.com> wrote:
> On Tue, 7 Jun 2011 10:19:58 +0100
> Jonathan Bowlas <j.bowlas at ucl.ac.uk> wrote:
>
>> Hi Silva Devs
>>
>  Hello,
>
>> Quick question, when developing a new visual theme is it possible to
>> call a function defined within a Main Layout object (i.e. the layout
>> object in the Porto layout called mainlayout) from another
>> ContentProvider or Viewlet page template? If so how would I do this?
>>
>
>  If you define a method on your Main layout, you can access it from
>  any view, content provider, viewlet or viewlet manager using the
>  layout attribute:
>
>
>  def update(self):
>     ...
>     self.layout.method()
>
>
>  Or in a template:
>
>    layout.method() (with Chameleon)
>    layout/method   (with regular templates)
>
>
>  Your content provider, view, viewlet must have been created by
>  inheriting from one of the base class of silva.core.view.
>
>  If you add specific methods to your main layout that are used in your
>  layout, don't forget to define them as well on the main layout used
>  for errors, like for example :
>  (https://dev.infrae.com/browser/silva.core.layout/src/silva/core/layout/porto/porto.py#L57)
>
>> The reason I ask is that we have a NonPublishable SimpleItem
>> (UCLAttributes object) that we use to allow Silva Editors to configure
>> various options within the layout, and rather than having to write a
>> function to call this from every Viewlet and ContentProvider everytime
>> I need a parameter it would be prefereable to call it once globally.
>>
>
>  Yes, that would be preferable, and you can use the layout object for
>  that, it is partially done for that.
>
>  I would even recommend that if you have to compute a setting more
>  than two time, you should set it on the layout object, in the update
>  method (don't forget to call the update method on the parent class).
>
>  Regards,
>
>  Sylvain,
>
>
>
>
> --
> Sylvain Viollon -- Infrae
> t +31 10 243 7051 -- http://infrae.com
> Hoevestraat 10 3033GC Rotterdam -- The Netherlands
>



-- 
Jonathan Bowlas
Web Support Officer
Media Services
University College London
Email: j.bowlas at ucl.ac.uk