ntg-context June 2022

ntg-context@ntg.nl

36 participants
69 discussions

Rotating jpeg image gives weird output
by denis.maier＠unibe.ch 15 Jun '22

15 Jun '22

Hi, I have a jpeg image that drives me crazy. The scanned image I have received from the author is in landscape. So, I've rotated the image, but now two things happen: 1. there's a weird offset (the image is moved to the right) 2. The output contains this line . location=local,global. location=local,global I'm not quite quite sure how I can produce a MWE that shows the problem, but has anyone ever seen something like this? Does anyone know what that < . location=local,global. location=local,global > stuff means? Best, Denis P.S: I've performed the rotations using the standard picture editor on Windows and with GIMP. Happens with both tools.l P.S.S.: This seems to be somehow related to the particular file. With a different file that does not happen.

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Table of Contents empty for unknown reason
by Joel 14 Jun '22

14 Jun '22

I need to display a table of contents, but only displaying chapters. Here is my minimum working example: \starttext \startfrontmatter \startchapter[title={Contents}] \placelist[chapter] \stopchapter \completecontent \stopfrontmatter \startbodymatter \startchapter[title={Title 1}] \input knuth \stopchapter \stopbodymatter \stoptext For reasons I don't understand, both \placelist[chapter] and \completecontent display the title, but are otherwise empty of contents. I believe the code was working before an update. I used ConTeXt live though and confirmed this code even doesn't work there. Why isn't it rendering the table of contents? --Joel

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Problems with MetaFun Transparency Groups
by Stefan Haller 13 Jun '22

13 Jun '22

Hi everyone! I have a question regarding transparency groups in MetaFun. As a toy example, I want to draw a grid of lines where the whole grid should have an opacity of 25%. If I draw intersecting lines individually with `withtransparency(1, .25)` the overlapping parts will have a total opacity of 50%. However, I want to draw the whole grid as one group and then blend it as a whole so that the whole grid is evenly colored when blended. According to the MetaFun manual we should be able to get the desired effect with the `asgroup` operator applied to a picture. (Actually, the manual says the operator is called `grouped` but the source code of the graphics above uses the `asgroup` operator [1].) The `asgroup` does in fact insert a transparency group into the PDF output: > << /Type /XObject /Subtype /Form /FormType 1 /Group << /S /Transparency /I false /K false However, the group does not seem to be blended as one group and we can still see that the overlapping parts are darker than the other parts of the line. Something seems to be off. Looking at the compiled manual also shows that the transparency groups are not working (both parts of the arrow, the head and the tail, are blended independently and not as a group). When I recreate the graphics in Tikz/PGF everything works. The resulting PDF output looks similar, at least with my limited understanding of PDF format I am unable to understand the differences. The full example is attached below the text of my mail. The Tikz example on the fifth page shows the desired result. Do I misunderstand the syntax of transparency groups in MetaFun? Or is there some other problem? Maybe someone can point me in the right direction. Thanks in advance! Stefan Haller [1]: https://source.contextgarden.net/doc/context/sources/general/manuals/metafu… \nopdfcompression \usemodule[tikz] \starttext \startMPdefinitions vardef draw_grid = def withmycolor = withcolor red withtransparency(normaltransparent, .25) enddef; linecap := butt; u := 10mm; n := 20; pickup pencircle scaled 7mm; for i = 1 upto n: draw (0, i) * u -- (n+1, i) * u withmycolor; draw (i, 0) * u -- (i, n+1) * u withmycolor; endfor; enddef; \stopMPdefinitions \startMPpage draw image( draw_grid ) asgroup ""; addbackground withcolor yellow; \stopMPpage \startMPpage draw image( draw_grid ) asgroup "isolated"; addbackground withcolor yellow; \stopMPpage \startMPpage draw image( draw_grid ) asgroup "knockout"; addbackground withcolor yellow; \stopMPpage \startMPpage draw image( draw_grid ) asgroup "isolated,knockout"; addbackground withcolor yellow; \stopMPpage \startTEXpage \starttikzpicture \fill[yellow] (-0.35cm, -0.35cm) rectangle (21.35cm, 21.35cm); \startscope[opacity=.25, transparency group] \startscope[x=10mm, y=10mm, every path/.style={line width=7mm}] \foreach \i in {1,...,20}{ \draw[red] (0, \i) -- (21, \i); \draw[red] (\i, 0) -- (\i, 21); }; \stopscope \stopscope \stoptikzpicture \stopTEXpage

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small fontsize and \definecolumnsetspan cause columns to jump (bug?)
by a badin 12 Jun '22

12 Jun '22

Hi, if the fontsize is smaller than ~11pt and there is \startcolumnsetspan used, then the two first lines of the second column are not aligned to the grid (they jump). Making the font bigger, or deleting the \startcolumnsetspan can both fix the problem. It seems like a bug to me, but maybe I'm doing something wrong. Any idea about how to align all the lines in this specific table? I'm using it in a whole chapter in a small book with poems and on a small format the jump is visible. \showgrid \setupbodyfont[10pt] %\setupbodyfont[12pt] % works ok \setuppapersize[A8] % just to make this visible \setuplayout[grid=yes] \definecolumnset[example2][n=6, width=20mm] \definecolumnsetspan[title][n=6] \starttext \startcolumnset[example2] \startcolumnsetspan[title] Jumpy table \blank[line] \stopcolumnsetspan \input ward \stoptext Andrej

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How to define a section title, after the section title appears?
by Joel 12 Jun '22

12 Jun '22

I have a document with conditionally-generated content. There are some situations when I need the section title to change according to the content displayed within that section. For instance, the 14th section that appears in *every* chapter is either called "Cause and Effect" if the conditions decide to place macros \altMa, \altMb, or \altMc inside, but becomes called "Compare and Contrast" if one of a dozen other macros are pladed there. - The macros are defined in an entirely different macros.tex file. - The whole document is in a recurse loop, so \recurselevel or \chaptertitleis can give the current chapter number. I tried defining chapter titles inside the macros, `\setvalue{title\recurselevel}{Cause and Effect}`, but \getvalue{title\recurselevel}` couldn't find the defined value. I tried just defining in each macro \define\thesectiontitleis{Compare and Contrast}, but that only affects things AFTER the macro is called, so the wrong titles appear. How do I very simply make a section title change according to what content is inside it? --Joel

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Importing pdf into MPpage
by Stefan Nedeljkovic 11 Jun '22

11 Jun '22

Dear list, I would like to place a pdf file at (0, 0), centered at original size on a MPpage, and draw over it. But using the input command doesn't work. How should I approach this? Sincerely, Stefan

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Problem loading font in LMTX
by Stefan Nedeljkovic 11 Jun '22

11 Jun '22

Dear list, I have the following file: \starttypescript [lidia] \definetypeface[lidia][rm][serif][lidiaweb][cpsp=yes] \stoptypescript \setupbodyfont[lidia,36pt] \starttext \startTEXpage[align=normal,width=100cm,autowidth=force,offset=0pt] \startalignment[middle] 2{\hskip 0em}412{\hskip 0em}772 {\hskip 0em}КУЋНА {\hskip 0em}БРОЈА\\ {\vskip 2em}ИЗ {\hskip 0em}БАЗЕ {\hskip 0em}РЕПУБЛИЧКОГ {\hskip 0em}ГЕОДЕТСКОГ {\hskip 0em}ЗАВОДА\\ {\vskip 2em}У {\hskip 0em}ПРОЈЕКЦИЈИ {\hskip 0em}epsg{\hskip 0em}:{\hskip 0em}32634 {\hskip 0em}И {\hskip 0em}РАЗМЕРИ {\hskip 0em}1{\hskip 0em}:{\hskip 0em}388{\hskip 0em}000\\ {\vskip 2em}ЈАНУАР {\hskip 0em}2022 \stopalignment \stopTEXpage \stoptext Don't mind the auto generated skips. The problem is the font won't load. Here is the mtxrun output: mtxrun --script fonts --list --all --pattern=Lidia identifier familyname fontname filename subfont instances lidiaweb lidiaweb lidiaweb LidiaWeb.ttf lidiawebnormal lidiaweb lidiaweb LidiaWeb.ttf lidiawebregular lidiaweb lidiaweb LidiaWeb.ttf And the log file is attached. Please help me troubleshoot why this font won't load. Sincerely, Sefan

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Typesetting modern Greek (UTF8) with ConTeXt
by Gerben Wierda 08 Jun '22

08 Jun '22

For Russian I have: \setuplanguage[ru][patterns={ru}]\mainlanguage[ru] \definefallbackfamily [archimate] [ss] [Helvetica] [preset=range:cyrillic, tf=style:light, it=style:lightoblique, bf=style:regular, bi=style:oblique, force=yes, rscale=1.0] \definefontfamily [archimate] [ss] [Optima] \setupbodyfont[archimate] I can’t find out from ConTeXtgarden what code I must use for modern Greek (‘el’?) and what range I must use for Greek characters (I guess ‘greekandcoptic’ which I’ve seen mentioned somewhere). Correct? Gerben Wierda (LinkedIn <https://www.linkedin.com/in/gerbenwierda>) R&A IT Strategy <https://ea.rna.nl/> (main site) Book: Chess and the Art of Enterprise Architecture <https://ea.rna.nl/the-book/> Book: Mastering ArchiMate <https://ea.rna.nl/the-book-edition-iii/>

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Improving pandoc's ConTeXt output
by Albert Krewinkel 08 Jun '22

08 Jun '22

Hi all, I'm currently trying to improve the ConTeXt output generated by pandoc, the document convert. There are two questions that we haven't decided on, and I'd be grateful to receive some feedback from ConTeXt experts on these issues: 1. As far as I understand, the `\section` syntax currently produced by pandoc should be considered mkii legacy syntax. We're likely going to switch to the modern `\startsection`/`\stopsection` syntax instead. Are there any concerns about retiring the old syntax? (Side note: pandoc already produces the new syntax, but only when called with `--section-divs`.) 2. Similarly, I'd like to start wrapping paragraphs with `\startparagraph`/`\stopparagraph`. It is important for me to get properly tagged PDF, but this would also make the output more verbose. Is that something that you would find bothering, or do you see adding the extra environment by default as an acceptable practice? Of course, I'd also be happy to get other suggestions on how to improve pandoc's ConTeXt support. Thanks in advance, Albert -- Albert Krewinkel GPG: 8eed e3e2 e8c5 6f18 81fe e836 388d c0b2 1f63 1124

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Workshop at FrOSCon
by juh 08 Jun '22

08 Jun '22

Dear all, this year there will be a real life FrOSCon in Bonn Sankt Augustin at the Fachhochschule Rhein-Sieg again. https://www.froscon.org/cfp/cfpapers/ I am considering to submit a workshop to bootstrap people with ConTeXt, but I am not the best one to do this. So I would like to discuss if we as a community can do something. There are several possibilities: 1. Developer Room https://www.froscon.org/cfp/cfprojects/ This is a room where a project can organize their own schedule. They can programme, give talks or workshops. I've done some of these in the recent years together with the Zope/Plone Community, the Python Community or Hostsharing. It was always great fun. 2. Workshop A workshop is scheduled in the main programme of FrOSCon. Duration: 2h. I think that this is a good schedule to bootstrap people with LMTX and for the first hello world steps. 3. Booth I guess that Dante will have a booth as they had the years before. 4. A talk. I am pondering if I should submit a talk about our production at Hostsharing but typesetting does not fit nicely in the main topics of the conference. Deadline is 2022-06-12. For the Developer Room we need at least three people willing to attend the whole time at least for one day. If anyone would help me to organize a 2h-Bootstrap Workshop for ConTeXt I would be very happy. Due to my holidays I am only available today and I am unsure if I will have a stable internet connection from tomorrow on. Sorry for the late announcement. Ciao! juh -- Autoren-Homepage: ......... http://literatur.hasecke.com Satiren & Essays: ......... http://www.sudelbuch.de Privater Blog: ............ http://www.hasecke.eu Netzliteratur-Projekt: .... http://www.generationenprojekt.de

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ntg-context June 2022