autumnus schrieb am 28.12.2024 um 13:34:
hi,
I'm creating a command that can format multiple choice questions on my own.
I've done most of it at the moment.
But I want more, so I'm trying to create more versions of this command
that is already nearing completion.
So I'm using the following command to create a command with more possibilities.
I've noticed that ‘startitem stopitem’ isn't working.
You can't put the items in a group.
\starttext
before
\startitemize[n,horizontal,two]
\begingroup\startitem aaa\stopitem\endgroup
\begingroup\startitem bbb\stopitem\endgroup
\stopitemize
after
\stoptext
Their location and serial number are anomalous.
%%%% Removed some unnecessary commands to show what the problem was.
% macros=mkvi
\starttext
\unprotect
\installnamespace {chitem}
\installcommandhandler \????chitem {chitem} \????chitem
\appendtoks
\setuevalue{\e!start\currentchitem}{\startnamedchitem [\currentchitem]}%
\setuevalue{\e!stop \currentchitem}{\stopnamedchitem}%
\to \everydefinechitem
\tolerant\protected\def\markedchoice#1{{\sym{@} \red sym : #1}}
\tolerant\protected\def\normalchoice#1{\startitem normal : #1\stopitem}
\tolerant\protected\def\\calc_maxwidth#1{}
%The longest option text is calculated by comparison to
% determine the number of columns that can be typeset
\tolerant\protected\def\startnamedchitem[#chitem]#*[#mark]#*[#option]#*#choice\stopnamedchitem%
You can't use \stopnamedchitem as delimiter for the environment,
what TeX has to see is the new \stopchitem command.
One method to achieve this is \grabuntil with a processing function.
\tolerant\protected\def\startnamedchitem[#1]#*[#2]#*[#3]%
{\begingroup
\edef\currentchitem{#1}%
\edef\m_mark{#2}%
\grabuntil{\e!stop\currentchitem}\process_chitem}
\def\process_chitem#1%
{\ifx\m_mark\wildcardsymbol
\aftergroup\markedchoice
\else
\aftergroup\normalchoice
\fi
\endgroup{#1}}
Wolfgang
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