Fabrice Couvreur schrieb am 05.08.2020 um 19:33:
Hello,
I also use a square to complete a demonstration. I tried this without
success
Thank you
Fabrice
\definesymbol[Fin][\mathematics{\square}]
\def\qed{\strut\wordright{\symbol[Fin]}}
\defineenumeration
[proof]
[...,
closesymbol={\symbol[\qed]}]
1. \symbol is meant to access pre defined symbols, as fallback method
when the requested symbol doesn't exist ConTeXt outputs the argument.
This fallback is in my opinion problematic because it's easy to miss it.
\starttext
\symbol[square]
\symbol[quadrat]
\stoptext
2. When you use the closesymbol for a enumeration ConTeXt uses also the
argument of the closecommand to apply something to the symbol, by
default the argument to the closecommand key is \wordright.
This means you're putting \wordright (which itself is flushed as symbol)
within \wordright which has to fail at some point.
Below is a cleaner version to put a symbol at the end of each proof. The
\blank setting in the \PlaceProofSymbol definition moves the symbol back
in the math formula to avoid the vertical space between them, you can
remove it but I would at leas use \blank[back] to get rid of the empty
line between the formula and the symbol.
\define[1]\PlaceProofSymbol
{\blank[back,overlay]%
\dontleavehmode\wordright{#1}}
\defineenumeration
[proof]
[ closesymbol={\symbol[square]},
closecommand=\PlaceProofSymbol]
\starttext
\startproof
\startformula
a^2 + b^2 = c^2
\stopformula
\stopproof
\stoptext
Wolfgang
___________________________________________________________________________________
If your question is of interest to others as well, please add an entry to the
Wiki!
maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
webpage : http://www.pragma-ade.nl / http://context.aanhet.net
archive : https://bitbucket.org/phg/context-mirror/commits/
wiki : http://contextgarden.net
___________________________________________________________________________________
