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<p>Hi Facu,</p>
<p>(inline)</p>
<div class="moz-cite-prefix">On 2026-04-07 4:34 PM, Facundo Javier
Gelatti via Cuis-dev wrote:<br>
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<div>This is very interesting! I think what you say makes
sense.</div>
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<div>You leave me thinking about that distinction (i.e. a
method that we strongly expect to be there, vs. a method
that <i>could</i> be there for completeness, but which is
not really necessary). I guess this is something I don't
think too much about when I consider the "type" of an object
(i.e. which messages it should be able to correctly
understand). I think I tend to view each message as either
part or not part of the expected protocol, not something in
between (like "maybe/probably part of the protocol").</div>
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<p>I think that there are several protocols that a class may
provide. Some maybe subsets of others. #buildMorphicWindow is part
of an expanded protocol that only some windows provide.</p>
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<div>Other things that I have in my mind:<br>
<ul>
<li>I'm not sure if we should have another marker for
these "nice to have" messages. My first reaction is
"no", just because we'd be adding more elements to think
about in the system; but then I come back to the
original distinction, which is something we should think
about anyway (even if implicitly)!</li>
<li>One concrete "middle ground" in this case could be to
implement SystemWindow>>#buildMorphicWindow as an
empty method, maybe with a comment mentioning that it's
just a non-essential extension point which <i>could</i>
be overridden by subclasses (but it's not necessary to
do so to have e.g. #open:label: work, etc.).</li>
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<p>Having #buildMorphicWindow as an empty method is not good IMO
because it can hide the problem. We want _some_ exception. A DNU
is better than just continue silently. But I like the idea of a
middle ground. In this case, I implemented and called
#subclassOptionalResponsibility. A reasonable error message plus
some comments may be a good solution. Please take a look, it is
now at GitHub.</p>
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<div>I hope my comments make sense (mostly things to ponder,
we don't necessarily need to act on them right now).</div>
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<p>Of course they do. This kind of discussion is great, it enables
polishing the system!</p>
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<div>Cheers!</div>
<div>Facu</div>
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<p>Cheers!</p>
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<div dir="ltr" class="gmail_attr">El mar, 7 abr 2026 a las
15:39, Juan Vuletich (<<a
href="mailto:juan@jvuletich.org" moz-do-not-send="true"
class="moz-txt-link-freetext">juan@jvuletich.org</a>>)
escribió:<br>
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style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">Hi
Facu,<br>
<br>
I don't like adding a send to #subclassResponsibility in the
abstract <br>
class in this case. #subclassResponsibility is a strong
assertion from <br>
the system that all subclasses should reimplement that
method. It is a <br>
message directed to any developer adding a new subclass. And
in this <br>
case, that's not true. There are subclasses that don't need
that method <br>
at all. It is true, #open:label: will fail. That only means
that <br>
#open:label: is not appropriate for them. Adding the call to
<br>
#subclassResponsibility would not change this fact.<br>
<br>
Hope this makes sense to you.<br>
<br>
Thanks,<br>
<br>
On 2026-04-02 4:14 PM, Facundo Javier Gelatti via Cuis-dev
wrote:<br>
> The #buildMorphicWindow message is sent from
SystemWindow class >> <br>
> #open:label:, and the method is on many window classes
on the system, <br>
> so I thought it'd be nice to have the abstract method
in SystemWindow. <br>
> I attach a (very small) change that adds that method.<br>
><br>
> I also noticed this method is missing
in TranscriptWindow, <br>
> WorkspaceWindow and PreDebugWindow, so the #open:label:
message is <br>
> failing on those classes. I'm not sure what we should
do about them.<br>
><br>
> Cheers!<br>
> Facu<br>
><br>
-- <br>
Juan Vuletich<br>
<a href="http://www.cuis.st" rel="noreferrer"
target="_blank" moz-do-not-send="true">www.cuis.st</a><br>
<a href="http://github.com/jvuletich" rel="noreferrer"
target="_blank" moz-do-not-send="true">github.com/jvuletich</a><br>
<a href="http://researchgate.net/profile/Juan-Vuletich"
rel="noreferrer" target="_blank" moz-do-not-send="true">researchgate.net/profile/Juan-Vuletich</a><br>
<a href="http://independent.academia.edu/JuanVuletich"
rel="noreferrer" target="_blank" moz-do-not-send="true">independent.academia.edu/JuanVuletich</a><br>
<a
href="http://patents.justia.com/inventor/juan-manuel-vuletich"
rel="noreferrer" target="_blank" moz-do-not-send="true">patents.justia.com/inventor/juan-manuel-vuletich</a><br>
<br>
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<pre class="moz-signature" cols="72">--
Juan Vuletich
<a class="moz-txt-link-abbreviated" href="http://www.cuis.st">www.cuis.st</a>
github.com/jvuletich
researchgate.net/profile/Juan-Vuletich
independent.academia.edu/JuanVuletich
patents.justia.com/inventor/juan-manuel-vuletich</pre>
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