- ntg-context - NTG Mailing Lists

playing with dates
by Pablo Rodriguez 17 Dec '24

17 Dec '24

Dear list, I would like to be able to design some calendars. Is there any way to have a command (Lua or ConTeXt) that can increase or decrease a given date by days (something like \nextday or \previousday). I have tried \date and \increment or \decrement, as shown in the wiki: \starttext Today is \currentdate. \dorecurse{25} {\increment\normalday} Tomorrow will be \currentdate. \decrement\normalday %\increment\normalmonth% -- gives an error \increment\normalyear And today in a year will be \currentdate. \stoptext But the main problem is that I end up having the improbable day of December 41st, 2024 (with \decrement\normalday, it would read -9th). Besides, \normalmonth cannot be incremented or decremented (although this would be useless for me). Is there any way to get a command that can increment or decrement by days a given date? Many thanks for your help, Pablo

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understanding \writetolist and \writebetweenlist
by Henning Hraban Ramm 17 Dec '24

17 Dec '24

Hi, I’m trying to understand the ordering of list entries and find it really hard. Below is the content of "inbetween-01.tex" from the test suite, more or less the same was in https://wiki.contextgarden.ne/Command/writebetweenlist; I tried to enhance it but probably messed it up. Looking at the examples, I only partly understand what’s going on. * What’s the difference of \writetolist and \writebetweenlist WRT their connection to the place where they occur? This seems to be important. (\writetolist has a section number, \writebetweenlist hasn’t …) * What’s the difference between location="here", "none" or nothing with \writetolist? * In my notes, I found the remark that "between" items should be anchored to a paragraph (not being their own par) to avoid inserting whitespace. * The order of \placelist can be normal, command, all or title. The latter isn’t mentioned in the file below, but in the interface. I don’t understand the effect for "normal" or "all" in the example. - normal: there’s some reordering. - command: "only the commands": does this mean, sort the "between" entries by macro name or how? - all: everything in the order of occurrence (that’s clear) - title: sorted by title; how does this affect "between" entries? Hraban """ % inbetween-01.tex \definelist[testlist][criterium=all] \starttext Regular list entries are bound to a specific location in order to get the right pagenumber etc.\ associated. When pushing something inbetween (in mkiv) it ends up directly in the list. This is the default because otherwise users will wonder why spacing might get messed up (due to an unseen but present node). It is possible to force a location by explicitly setting \type {location} to \type {here}. Another way to force a certain order is to set the \type {order} variable when placing a list. The \type {command} option only pushes commands into the right order, and \type {all} orders all entries (which might be too much). In this case no specific location is needed with the inbetween method. Maybe additional mechanisms show up some day. \subject{normal} \placelist[testlist] \subject{command} \placelist[testlist][order=command] \subject{all} \placelist[testlist][order=all] \page \input tufte \writetolist [testlist] {1} {One} \writebetweenlist[testlist] {\blackrule[color=red,width=\hsize]} \writebetweenlist[testlist][location=here]{\blackrule[color=blue,width=\hsize]} \writetolist [testlist] {2} {Second} \writetolist [testlist][location=none]{W} {Whatever} \writebetweenlist[testlist] {\blackrule[color=green,width=\hsize]} \stoptext """

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Possible to "freeze" numbering when using stacking
by Aditya Mahajan 16 Dec '24

16 Dec '24

Hi, I use stacking to incrementally reveal text in slides. Is it possible to freeze numbering when using stacking? Consider the following example: \setuppapersize[S4] \starttext \startstackingsteps[1,{1:2}] \placeformula \startformula A = B \stopformula \startstacking[2] This is an important formula \stopstacking \stopstackingsteps \stoptext Currently, the formula number is incremented on the second page. Would it possible to freeze the formula number? Thanks, Aditya

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Including SVG manipulating color or rewrite in MP
by juh+ntg-context＠mailbox.org 14 Dec '24

14 Dec '24

Dear all, I have near to zero knowledge about MPgraphics, so I always use SVG files from various sources. I do something like this: \defineoverlay[pic][\externalfigure[form.svg][width=14em]] \defineframed [textcircledA] [ frame=off, strut=yes, rulethickness=0.0pt, background=pic, location=top,] \textcircledA{\externalfigure[icon.svg][width=280px]} The form.svg appears as background of icon.svg. Now I want to change the stroke color in the svg. It is very simple: <?xml version="1.0" encoding="UTF-8"?>  <svg width="20.887mm" height="17.613mm" version="1.1" viewBox="0 0 20.887 17.613" xmlns="http://www.w3.org/2000/svg"> <g transform="translate(152.66 -101.94)"> <path d="m-150.94 114.93c-0.5424-1.3121-0.58209-2.9382 0.18256-5.2163 2.3566-7.0175 11.139-8.7098 15.878-3.0594 7.6978 8.7032-11.506 16.052-16.06 8.2756" fill="none" stroke="#99bcdb" stroke-linecap="round" stroke-width="2"/> </g> </svg> I can simply open it in inkscape set the color an save it under a meaningful filename, but I would like to set the color in the context file. I tried to define the overlay pic with \includesvgbuffer but I can't get it to work. \startbuffer[svg] <svg width="20.887mm" height="17.613mm" version="1.1" viewBox="0 0 20.887 17.613" xmlns="http://www.w3.org/2000/svg"> <g transform="translate(152.66 -101.94)"> <path d="m-150.94 114.93c-0.5424-1.3121-0.58209-2.9382 0.18256-5.2163 2.3566-7.0175 11.139-8.7098 15.878-3.0594 7.6978 8.7032-11.506 16.052-16.06 8.2756" fill="none" stroke="MyColor" stroke-linecap="round" stroke-width="2"/> </g> </svg> \stopbuffer \defineoverlay[pic][\includesvgbuffer[svg][offset=1bp]] Nothing happens, no form appears in the overlay. I saw an example with \startstopuseMPgraphic in the Wiki. \startuseMPgraphic{MPtextcircle} path p; p := fullcircle xscaled OverlayWidth yscaled OverlayWidth; setbounds currentpicture to p ; % p:= p shifted (0,StrutDepth/2.7); draw p withpen pencircle scaled 25pt withcolor OverlayLineColor; \stopuseMPgraphic \defineoverlay[OLtextcircle][\useMPgraphic{MPtextcircle}] This works for me. Is it possible to use a svgbuffer in a overlay definition? Or do I have to convert the SVG code to MP? Is there a converter? TIA juh

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genealogy tree
by Thomas Meyer 11 Dec '24

11 Dec '24

Hi folks, is it possible to build a complex pedigree\genealogy tree with ConTeXt, like in LaTeX with genealogytree? Or what possibilities are there? Greetings Thomas

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\filename and \tex
by Henning Hraban Ramm 11 Dec '24

11 Dec '24

Hi, \filename tends to get too much letterspacing; can I change that? \tex has strange hyphenation, seems to break whereever; can I change that? Hraban

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regular online meet-up
by Henning Hraban Ramm 11 Dec '24

11 Dec '24

You’re invited to this year’s last regular online meet-up, this upcoming Wednesday, December 11, 19:00 CET (UTC+1) at https://lecture.senfcall.de/hen-rbr-rku-oke (same, but shorter: https://u.mtxrun.eu/ctxmtg) ConTeXt users of all levels are welcome! Looking forward to seeing you, Hraban (Same blurb as always:) [Howto] * No special software installation required; most modern browsers should work (WebRTC required). * Open the URL above, accept the privacy statement, * enter your name, * click "join" (or "start" if you’re the first), * click "with microphone", allow your browser to access it, check the audio. * Your microphone is muted if you join. Activate microphone and/or camera with the buttons at the bottom. * Minimize the default presentation with the "screen" button, bottom right. * If you’d like to share your screen or upload a file, you can make yourself the presenter: Click on your user name, change the setting, then you’ll see the "screen sharing" button beside the camera button; also there’s now "manage presentations" behind the "plus" button. Beware there is only one presenter at a time, so don’t kill someone else’s presentation. [Technical hints] * Sound is usually better if you use a headset (less noise for everyone). * Connection problems are mostly due to low bandwidth or high latency on your side, e.g. with mobile connections. * Sometimes leaving and re-entering helps. * If audio/video doesn’t work for you, you can still use the text chat. * Screen sharing needs a lot of bandwidth. * BigBlueButton documentation applies: https://bigbluebutton.org/teachers/tutorials/ [Netiquette] * Please use a name that we recognize from here. Some feel uncomfortable with anonymous lurkers. * Mute your microphone while you’re not talking. * It’s nice to show your face at least when you join. * If there are connection problems, stop camera sharing. * The room is set to “everyone’s a moderator“, I trust you...

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Re: Roman numerals typography
by damien＠thiriet.web4me.fr 11 Dec '24

11 Dec '24

Thanks Hraban, this is exactly what I need! Once more, the stuff I was looking for was already implemented in ConTeXt… > > Am 07.12.24 um 13:57 schrieb Damien Thiriet via ntg-context: >> In French typography, roman numerals are usually typeset being >> connected >> with a top bar and a lower bar > > Did you try the numbering option "or"? > > \convertnumber{or}{12} > > Hraban > Damien

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Donald E. Knuth. — The Grapholinguistic Model of TeX (interview) — “All Questions Answered”
by luigi scarso 10 Dec '24

10 Dec '24

https://www.youtube.com/watch?v=TVSuM84SS3M Talk given at the Grapholinguistics in the 21st Century Conference, on October 24th, 2024. https://grafematik2024.sciencesconf.org/ <https://www.youtube.com/redirect?event=video_description&redir_token=QUFFLU…> -- luigi

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How to make this Metapost diagram adjust to the width of text?
by Joel 09 Dec '24

09 Dec '24

I am using this to create a simple branched diagram, with one item, branches into two, and each of those two further branch into two. I'm running into two problems: (1) The lines cut right through the word "apple" and "banana", I need to place a node at the right of apple and banana that connects to sub-branches. In other words, I'd rather it have a broken line, ending at left of apple and then continuing at right of apple. (2) If you put longer text in the top category, it adjusts. And if you put longer text in the lowest branches, it adjusts, but I can't find a way to get the branches to adjust length to accommodate longer text in the middle, where apple and banana are. I tried using different code to find textwidth, but it isn't working: numeric text_width; text_width = width(textext("#2")); How can I make the diagram adjust if the words in the middle branches are longer? --Joel \starttext % Define the macro outside the Metapost code block \def\macroXa#1#2#3#4#5#6#7 { \startMPcode u := 1.5cm; % Reduced unit size for compact spacing % Main node positions z0 = (0, 0); % Fruit position z1 = (1u, 0); % Horizontal segment from Fruit z2 = (1u, 0.6u); % Apple position z3 = (1u, -0.6u); % Banana position z4 = (3u, 0.9u); % Fuji branch z5 = (3u, 0.3u); % Gala branch z6 = (3u, -0.3u);% Cavendish branch z7 = (3u, -0.9u);% Plantain branch z8 = (4u, 0.9u); % Fuji z9 = (4u, 0.3u); % Gala z10 = (4u, -0.3u); % Cavendish z11 = (4u, -0.9u); % Plantain % Main paths draw z0 -- z1; % Horizontal from Fruit draw z1 -- z2; % Line to Apple (90-degree angle) draw z1 -- z3; % Line to Banana (90-degree angle) % Apple sub-branches draw z2 -- (3u, 0.6u) -- z4; % Right angle to Fuji draw z2 -- (3u, 0.6u) -- z5; % Right angle to Gala % Banana sub-branches draw z3 -- (3u, -0.6u) -- z6; % Right angle to Cavendish draw z3 -- (3u, -0.6u) -- z7; % Right angle to Plantain % Final horizontal branches draw z4 -- z8; % Fuji draw z5 -- z9; % Gala draw z6 -- z10; % Cavendish draw z7 -- z11; % Plantain % Add labels using macro arguments label.lft(btex #1 etex, z0); % Fruit label.rt(btex #2 etex, z2); % Apple label.rt(btex #3 etex, z3); % Banana label.rt(btex #4 etex, z8); % Fuji label.rt(btex #5 etex, z9); % Gala label.rt(btex #6 etex, z10); % Cavendish label.rt(btex #7 etex, z11); % Plantain \stopMPcode } % Call the macro with labels \macroXa{Fruit}{Apple}{Banana}{Fuji}{Gala}{Cavendish}{Plantain} \macroXa{This text is longer}{Apple}{Banana}{Fuji}{Gala}{Cavendish}{Plantain} \macroXa{This text is longer}{Apple}{it needs to accomodate longer text here}{Fuji}{Gala}{Cavendish}{Plantain} \stoptext

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