[Cuis-dev] PlacedMorph vs BoxedMorph

[Juan Vuletich]

Hi Bernhard,

On 9/2/2024 5:01 PM, Bernhard Pieber via Cuis-dev wrote:
> Hi Juan, Hilaire,
>
> I think the root cause of this problem is that these concepts are 
> orthogonal. Maybe you want a morph that can be placed but has no 
> border or the other way around. Single inheritance is just not good at 
> expressing this. (This would be an ideal use case for stateful traits 
> IMO.) However, why not use composition instead of inheritance? Instead 
> of being a BoxedMorph any morph could just have a box (with border, 
> padding) if it needed one. There might be other useful types of 
> decorations for morphs, e.g. labels or scrolling. (Being a subclass of 
> PluggableMorph every PluggableScrollPane has a model although it does 
> not have a use for it.)
>
> Just my two cents…
>
> Cheers,
> Bernhard

What you suggest will have its own set of advantages and challenges. 
Fortunately, in Cuis, Morph class is pretty minimal, only stating that 
Morphs are nested in the owner / submorphs tree. Anything else is 
handled by subclasses. PlacedMorph only adds location and optional 
LayoutSpec.

So, here is my suggestion: Try it. Write new morphs, starting with one 
(or several!) subclass(es) of Morph. Implement your decoration strategy. 
You don't need to build any of the MorphicCanvas and MorphicEngine 
stuff. Those are pretty general. Your new Morphs could most likely live 
in the existing World. If not, you can write a new World. Switching 
between your NewWorld and the existing World is simply suspending / 
terminating the process for one UI and resuming / creating the process 
for the other. (You can easily have several instances of WorldMorph 
today if you want).

See where it leads. I'm sure it would be a wonderful learning experience 
for all of us!

Cheers,

-- 
Juan Vuletich
cuis.st
github.com/jvuletich
researchgate.net/profile/Juan-Vuletich
independent.academia.edu/JuanVuletich
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