[Cuis] Patterns

[Juan Vuletich]

Hi Thierry,


On 11/17/2015 1:42 AM, Thierry Goubier wrote:
> Le 17/11/2015 02:47, Germán Arduino a écrit :
>>
>>
>> 2015-11-16 22:06 GMT-03:00 Juan Vuletich <juan at jvuletich.org
>> <mailto:juan at jvuletich.org>>:
>>
>>     __
>>
>>     Well, I don't like the #open method in the model. The idea of View /
>>     Model separation is that views know about models, but models don't
>>     know about views. A Model should exist independently of being used
>>     from Morphic, MVC, Seaside, or any other UI framework. It could
>>     live, for example, in a Gemstone database with no UI at all. Or ir
>>     could travel to and from other systems, like VA Smalltalk, where the
>>     UI framework is completely different from Cuis'.
>>
>>
>> Interesting, really I never heard of the use of  #open at the model or I
>> do not remember it at all, but I think similar to Juan.
>
> Hum, #open has to go somewhere, so...
>
> Either it goes into a sort of Application Model, which regroup the 
> duties associated with the application (the view + model + whatever is 
> necessary in environment X), or it goes into an Application View which 
> then has model concerns in it (it knows how to start or connect to the 
> model, it knows what the model is composed of to connect subviews to 
> model elements, etc...).
>

The idea of view / model separation is pretty well explained in "Inside 
Smalltalk Vol II" 1.3 to 1.3.4, pages 7 to 11.

I agree that an Application object or such might make sense when you are 
building an application, especially if you need to deal with en external 
environment. But here we were talking about whether the Model classes 
should know about Morphs or not.

>>     I think it is better for the View to start it all.
>>
>>
>> +1
>
> I prefer to model an Application concept in the target desktop 
> environment if I want to model highly portable stuff.
>
> That application concern can be folded into a dedicated view if that 
> is the preferred convention in the target environment.
>
> Regards,
>
> Thierry

I wonder how would this result in practice. Do you have some examples to 
share?

Cheers,
Juan Vuletich