Re: Re: Maybe a PLIP for portlets?

Tonico Strasser wrote:

> Mirto Silvio Busico wrote:
>
>> Exact!!!!!!
>> See comments inline
>>
>> Tonico Strasser wrote:
>>
>>> Mirto Silvio Busico wrote:
>>>
>>>> But there is a problem: if a portlet is defined, but doesn't generate
>>>> any output, you obtain an empty graphic box (really more empty boxes
>>>> than useful boxes)
>>>>
>>>> So my question: how you can say inside portlets_fetcher.pt if a 
>>>> portlet
>>>> generates any output?
>>>
>>>
>>>
>>> Hi Mirto,
>>>
>>> I think this question has nothing to do with your portlet design. I 
>>> encountered a similar problem.
>>>
>>> Example
>>>
>>> Assuming a 3 column layout, I want to change it to a 2 column layout 
>>> if the right slots are empty or portlets on the right side do not 
>>> generate an output. This happens if a portlets have some conditions 
>>> (i.e. the reviewer portlet). The 'prepare_slots' script can not 
>>> detect if a portlet generates an output. So the 'hide_columns' 
>>> script will not work.
>>>
>> EXACT!!!! This is my point!
>> We need  a standard portlet definition that states:
>>
>>  "every portlet have to return 2 parameters:
>>
>>    1. return code: if the portlet have to be rendered or not
>>    2. the portlet generated output
>> "
>
>
> I think this is very difficult because the portlets are rendered as 
> macros in the context of the template. This has the andvantage that 
> you can refer to variables defined in the template that calls the 
> portlet.

Well, in this case can we use a variable defined in the page template (a 
name could be "render_me") that the called portlet must set in order to 
communicate to the page template if there is anything to render?

>
> In other words, the whole portlet concept needs to be rewritten for 
> this functionality. That would break backward compatibility again. I 
> might be wrong though.
>
There is any work in progress in this area? Any PLIP? Maybe this can be 
work for Plone 2.2?

> Tonico
>
>
>
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-- 

__________________________________________________________
Mirto Silvio Busico 		ICT Consultant
Tel. +39 333 4562651
 



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