Hi
David Arnold schrieb:
> All,
>
> Let's say I have some enumerations that are numbered, for
> definitions, examples, theorems, etc. Let's say I want everything in
> a section numbered consecutively, except figures. So, numbering would
> proceed like this:
Here is a possible solution.
Idea:
- Define own counters
- Use section type with "ownnumber" option
- Wrap them suitably
Lets call "Definition"s, "Example"s etc by the name "Topic" and assume
you want to reset the topic number with each section.
Here is the code:
<contextcode>
%%%<Topic>
\newcount\SectionNum
\def\resetSection{\SectionNum=0}
\def\stepSection{\advance\SectionNum by 1 \resetTopic}
\def\theSection{\the\SectionNum}
\resetSection
\newcount\TopicNum
\def\resetTopic{\TopicNum=0}
\def\stepTopic{\advance\TopicNum by 1}
\def\theTopic{\theSection.\the\TopicNum}
\resetTopic
\definehead[TopicHead][section=section-7]
\setuphead[TopicHead]
[ownnumber=yes, % use own counter TopicNum
% more setup
]
\def\Topic{\dotripleempty\doTopic}
% Usage: \Topic[topic type][topic text][label]
\def\doTopic[#1][#2][#3]{
\stepTopic
\ifthirdargument
\TopicHead[#3]{#1~\theTopic}{ #2}%
\else \ifsecondargument
\TopicHead{#1~\theTopic}{ #2}%
\else \iffirstargument
\TopicHead{#1~\theTopic}{}%
\else
\TopicHead{\theTopic}{}%
\fi \fi \fi}
%% Example for a convenient abbreviation:
%% \Def[...][...] instead of \Topic[Definition][...][...]
\def\Def{\dodoubleempty\doDef}
% Usage: \Def[title text][label]
\def\doDef[#1][#2]{
\ifsecondargument
\Topic[Definition][#1][#2]
\else\iffirstargument
\Topic[Definition][#1]
\else
\Topic[Definition]
\fi\fi}
%% I don't know if one can access section counters directly
%% So we need a wrapper for the section level that resets the
%% topic counter.
\setuphead[section]
[ownnumber=yes,
% more setup
]
\def\Section{\dosingleempty\doSection}
% Usage: \Section[label]{title text}
\def\doSection[#1]#2{
\stepSection
\iffirstargument
\section[#1]{\theSection}{#2}
\else
\section{\theSection}{#2}
\fi}
%%%</Topic>
%%% Example
\starttext
\Section{Things Going Wrong}
\Def[(Murphy's Law)][law:murphy]
Everything that can go wrong will go wrong sometime.
\Topic[Example][(Bread of Butter)]
An example for \in[law:murphy] is that a bread of butter falling off a
table universally lands with the buttered side on the carpet.
\Section{Motion}
\Def[(Silly Walk)][def:sillywalk]
Silly walking is a kind of walking made up of motions that do not
necessarily contribute to the advancement of the walker.
\Topic[Corollary][][cor:goosestep]
Goose-step is a type of silly walking as defined in \in[def:sillywalk].
\Topic[Remark]
Prussians and Bolshewists may not agree with \in[cor:goosestep].
\stoptext
</contextcode>
(I had a similar problem: I wanted a type of sections with a numbering
only affected by specified other structural elements.)
The solution is probably not the most ConTeXt-like -- I am still on my
way from LaTeX...
Question to TeX experts: in the context of the above, how would one
properly define a command like
\ProvideTopicType[Definition]{Def}
after which
\Def[(Murphy's Law)]
produces something like
Definition 1.2 (Murphy's Law)
Cheers!
Ulf
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