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Re: [Texmacs-dev] Scheme interface for the graphical mode

From: Massimiliano Gubinelli
Subject: Re: [Texmacs-dev] Scheme interface for the graphical mode
Date: Wed, 25 Nov 2020 08:09:53 +0100

 You can always force a module to load, by something like

(load-module '(name of module))

or something similar, now I do not remember. Look around in the scheme code, it 
is used once in a while.

Apriori also tm-define-macro macros should be visible. But again, I'm not sure 
right now. It could be that for some strange reason texmacs macros are not 
available at the REPL.


> On 25. Nov 2020, at 00:39, Giovanni Piredda <pireddag@posteo.de> wrote:
> Hi Max,
> thanks for the answer. I will continue the post with the code I wrote, which 
> is simple and does what I want although it may make graphical lists redundant 
> and difficult to read.
> For the visibility: does tm-define-macro also define globally-visible macros? 
> As I find that using define-graphics, which is defined in 
> progs/graphics/graphics-markup.scm with tm-define-macro, gives Unbound 
> variable: define-graphics.
> Or maybe it is the whole of graphics-markup.scm which is never loaded by 
> TeXmacs?
> At any rate the answer is that one should not yet use the built-in Scheme 
> functions for graphics manipulation (which look like a good system of 
> functions to me), so for the post I will use the few functions I wrote and 
> say that in TeXmacs a comprehensive set of functions has been sketched and 
> partly implemented and documented but it is not yet ready.
> G.
> On 25.11.20 00:02, Massimiliano Gubinelli wrote:
>> Dear Giovanni,
>>  procedures declared with tm-define are visible globally, while procedures 
>> declared with define are only visible within the module. I think this 
>> answers your question.
>> Of course in the future it is possible to imagine to enhance the module with 
>> additional procedures, useful for graphic programming, but for the moment I 
>> think would be better to experiment with code external to the main code-base.
>> Max
>>> On 24. Nov 2020, at 23:47, Giovanni Piredda <pireddag@posteo.de> wrote:
>>> Dear all,
>>> I am writing a small blog post for modular graphics and I realized that two 
>>> out of the three functions that I wrote for that already exist in TeXmacs 
>>> (and maybe the third too ... but I do not know).
>>> To orient myself better: what is the status of the functions in 
>>> progs/graphics/? Is one expected to be able to use them from Scheme?
>>> I tested a few in a Scheme session. Some work ((stree->tree '(rectangle 
>>> (point 0 0) (point 1 1))) draws a square), some don't (example: Unbound 
>>> variable: enhanced-tree-property-set!), some work differently from how I 
>>> expect them to.
>>> Example for the last case: (enhanced-tree->radical '(with "color" "red" 
>>> (gr-group (point 1 0) (point 1 1)))) outputs (with "color" "red" (gr-group 
>>> (point 1 0) (point 1 1)))
>>> A short explanation of the status would help me to rewrite what I have 
>>> already written (or to put it in the context of what already exists).
>>> As far as I can see, the whole documentation for these functions is in 
>>> Help→Scheme extensions→Scheme interface for the graphical mode.
>>> Looking forward to some info.
>>> Giovanni
>>> _______________________________________________
>>> Texmacs-dev mailing list
>>> Texmacs-dev@gnu.org
>>> https://lists.gnu.org/mailman/listinfo/texmacs-dev
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