Re: Piecewise margin line

[Otared Kavian <otared@gmail.com>]

Hi Johann,

Here is an example (extracted from one of my files…) which might give what you want: you can change some of the specifications easily.

% begin proclaim-leftbar.tex
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\startuseMPgraphic{mpos:region:leftbar}
	draw_multi_pars;
	draw_multi_side;
\stopuseMPgraphic

\definetextbackground[leftbartext]
	[location=paragraph,
	mp=mpos:region:leftbar,
	width=broad,
	frame=off,
	framecolor=darkred,
	rulethickness=2pt,
	frameoffset=1.25em,
	topoffset=-2ex,
	bottomoffset=-2ex,
	background=color,
	backgroundcolor=white,
	]
%%%%%%%
\defineenumeration[proclaim]
	[text=,
	before={\starttextbackground[leftbartext]}, 
	after={\stoptextbackground}, 
	style=slanted,
	title=yes,
	titleleft=,
	titleright={.},
	alternative=hanging,
	width=fit,
	right={~},
	way=bysection,
	prefix=yes,
	prefixsegments={chapter:section}]
%%%%%%%

\starttext

\startchapter[title={Topologie des nombres réels},reference=chap:R]

\startproclaim[lem:Q-Archimedien]{Proposition}
L'ensemble ${\Bbb Q}$ est {\bi archimédien}\index{archimédien}, c'est-à-dire que si $\epsilon \in {\Bbb Q}$ et $\epsilon > 0$, pour tout $R \in {\Bbb Q}$ tel que $R > 0$ il existe un entier $n \in {\Bbb N}$ tel que $n\epsilon > R$. 

Plus précisément il existe un unique entier $m \geq 0$ tel que $m\epsilon \leq R < (m+1)\epsilon$~: cet entier $m$ est appelé partie entière de $R/\epsilon$ et souvent noté $m = \lfloor R/\epsilon \rfloor$ (et l'entier $(m+1)$ est noté $m+1 = \lceil R/\epsilon \rceil$).
\stopproclaim

\stopchapter
\stoptext
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% end proclaim-leftbar.tex

Best regards: Otared

> On 20 Nov 2020, at 02:06, Johann Birnick <johann.birnick@hotmail.de> wrote:
> 
> On Thu, 2020-11-19 at 11:25 +0100, mf wrote:
>> Il 19/11/20 10:39, Johann Birnick ha scritto:
>>> Hello,
>>> 
>>> I want to setup some fancy theorem style for my math notes. For this I want
>>> to
>>> have a colored margin line next to my theorems. It should look like this:
>>> 
>>> https://i.ibb.co/F6L59pD/idea.png
>>> 
>>> The line should stretch over the whole theorem, not just the first line.
>>> (But the latter would be a beginning, though.)
>>> 
>>> Important to note is that the line should be *on the margin*, not in the
>>> text.
>>> 
>>> So do you have an idea on how I could do that? I would greatly appreciate
>>> your
>>> answer. Thank you!
>>> 

>> Look for \startsidebar \stopsidebar and \setupsidebar.
>> 
>> \setupsidebar [...,...] [..,..=..,..]
>>                    1           2
>>                   OPT
>> 1 NAME
>> 2 rulethickness      = DIMENSION
>>    rulecolor          = COLOR
>>    alternative        = NUMBER
>>    topoffset          = DIMENSION
>>    bottomoffset       = DIMENSION
>>    distance           = DIMENSION
>>    leftmargindistance = DIMENSION
>>    level              = NUMBER
>> 
>> Massi
> 
> Thank you! I have two more questions:
> 
> 1. Where can I find a documentation for this command? Even Google finds nothing.
> 
> 2. Unfortunately, adding \startsidebar and \stopsidebar into the `before` and
> `after` options of my enumeration messes up whitespace at the end. Here is a
> screenshot:
> 
> https://s12.directupload.net/images/201120/lfmwp5lh.png
> 
> The theorem is a normal enumeration. Like this:
> 
> \defineenumeration[Theorem][before=\startsidebar, after=stopsidebar]
> 
> I would greatly appreciate your help.
> 
> Thank you!
> Johann
> 
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