- ntg-context - Mailing Lists

Re: [NTG-context] Building a guitar chord using MP
by Vyatcheslav Yatskovsky 10 Apr '10

10 Apr '10

> I usually tackle this sort of thing by first drawing the entire image > in metapost code alone. Then, when that works, write a tex command > that fills in bits and pieces of the metapost image. I understand your idea. Indeed, MP code draws underlying grid. How to overlay circles on it using TeX? Please, an example. -- Best Regards, Vyatcheslav Yatskovsky

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Shaped paragraps (and overlays) again
by Erik Margraf 10 Apr '10

10 Apr '10

Dear ConTeXters, sorry for posting this again. Maybe the first time I asked the wrong way, the wrong question or at the wrong time. I'd like to use the "shapetext" facility and have some problems with it. My example tex file and two results are attached. The file both.pdf shows the result with two shaped paragraphs. One.pdf the result with one shape commented out (current state of source file). context --version gives MTXrun | current version: 2010.03.30 18:56 Any help would be appreciated. (Even the statement "won't work" ) Erik

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character spacing
by Philipp Gesang 10 Apr '10

10 Apr '10

Hi, I'm looking for a non-bureaucratic way to add some space to parentheses. typo-spa.mkiv looked most promising, so I did ---8<-------------------------------------------------------------------------- \definecharacterspacing[parens] \setupcharacterspacing[parens] ["0040] [right=.2,alternative=1] \setupcharacterspacing[parens] ["0041] [left=.2,alternative=1] \starttext aaa(aaa)aaa\par \setcharacterspacing[parens] aaa(aaa)aaa \stoptext ---8<-------------------------------------------------------------------------- but can't notice any difference. Is there a way to set spacing per character that does not involve changing the font or making characters active? I wish you all a nice weekend, Philipp -- () ascii ribbon campaign - against html e-mail /\ www.asciiribbon.org - against proprietary attachments

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Building a guitar chord using MP
by Vyatcheslav Yatskovsky 10 Apr '10

10 Apr '10

Hello, I have interesting task. I want to build a picture of a guitar chord using metapost. For now, I only knew how to make a chord grid: \startreusableMPgraphic{chordgrid} drawoptions(withpen pencircle scaled 0.4pt withcolor black) ; draw hlingrid(0, 5, 1, 0.8cm, 1cm) ; draw vlingrid(0, 4, 1, 1cm, 0.8cm) ; \stopreusableMPgraphic \define[0]\ChGrid{\dontleavehmode\useMPgraphic{chordgrid}\hskip2mm} \starttext \ChGrid \stoptext I need to change it so that I could specify fret numbers, i.e. six numbers for each string, and draw a filled circles in these positions. I've started with a command like this \define[6]\Ch{\dontleavehmode\useMPgraphic{chordgrid}... I'm not sure what to do next... How to pass these parameters into MP, how to organize the loop... For a test, \Ch[1][3][1][2][1][1] should produce |-O-|---|---|---| |-O-|---|---|---| |---|-O-|---|---| |-O-|---|---|---| |---|---|-O-|---| |-O-|---|---|---| Please, help me with it. -- Best Regards, Vyatcheslav Yatskovsky

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regenerate database
by Honza Pohanka 10 Apr '10

10 Apr '10

Hello, which command regenerates the file database, please? I'm trying to add type-my.tex file to texmf-local tree in Context minimals. I found that luatools --generate should do that job, but it does not work for me. regards Jan -- Tato zpráva byla vytvořena převratným poštovním klientem Opery: http://www.opera.com/mail/

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Re: [NTG-context] callback.register
by Wolfgang Werners-Lucchini 10 Apr '10

10 Apr '10

> there are two user hooks: > > tasks.appendaction("processors","before","modules.mine.whatever_a") > tasks.appendaction("processors","after","modules.mine.whatever_b") > ----------------------------------------- My example looks now \starttext \startluacode function MyPreLB(head,gc) texio.write("\n") for n in node.traverse(head) do if node.type(n.id) == "glyph" then texio.write(string.char(n.char)) elseif node.type(n.id) == "glue" then texio.write(' ') end end texio.write("\n") return head end tasks.appendaction("processors","before","MyPreLB") \stopluacode Dies ist ein Test. \stoptext Is it correct to return 'head'? Wolfgang

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Re: [NTG-context] callback.register
by Wolfgang Werners-Lucchini 09 Apr '10

09 Apr '10

> Hello, > > Here a patch for luat-cbk.lua: > > function callbacks.register(name,func,freeze) > if frozen[name] then > if trace_callbacks then > frozenmessage("registering",name) > end > return nil, name .. " is frozen" > elseif freeze then > frozen[name] = (type(freeze) == "string" and freeze) or > "registered" > return register_callback(name,func) > else > return register_callback(name,func) > end > end > > function callback.register(name,func) -- original > if frozen[name] then > if trace_callbacks then > frozenmessage("registering",name) > end > return nil, name .. " is frozen" > else > return register_callback(name,func) > end > end > > (Untested...) > > Cheers, Peter and function callbacks.report() local list = callback.list() for name, func in table.sortedpairs(list) do local str = frozen[name] if str then logs.report("callbacks","%s: %s -> %s",state(name),name,str) else logs.report("callbacks","%s: %s",state(name),name) end end end Wolfgang

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error messages for callback.register
by Peter Münster 09 Apr '10

09 Apr '10

Hello, Here a patch for luat-cbk.lua: function callbacks.register(name,func,freeze) if frozen[name] then if trace_callbacks then frozenmessage("registering",name) end return nil, name .. " is frozen" elseif freeze then frozen[name] = (type(freeze) == "string" and freeze) or "registered" return register_callback(name,func) else return register_callback(name,func) end end function callback.register(name,func) -- original if frozen[name] then if trace_callbacks then frozenmessage("registering",name) end return nil, name .. " is frozen" else return register_callback(name,func) end end (Untested...) Cheers, Peter -- Contact information: http://pmrb.free.fr/contact/

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Re: [NTG-context] callback.register
by Wolfgang Werners-Lucchini 09 Apr '10

09 Apr '10

> > I tried the following > > > > -------------------------------------- > > \starttext > > \startluacode > > local OldPreLB > > > > function MyPreLB(head,gc) > > ?texio.write_nl("########### Here I am!") > > ?OldPreLB(head,gc) > > end > > > > OldPreLB = callback.find('pre_linebreak_filter') > > callback.register('pre_linebreak_filter',MyPreLB) > > \stopluacode > > > > Test > > \stoptext > > -------------------------------------- > > > > but MyPreLB() is not called. > > What I am doing wrong here? > > Hi Wolfgang, > > see http://www.ntg.nl/pipermail/ntg-context/2010/047018.html > > -- > Best regards, > > Li Yanrui (???) I see! >From the info found there ----------------------------------------- there are two user hooks: tasks.appendaction("processors","before","modules.mine.whatever_a") tasks.appendaction("processors","after","modules.mine.whatever_b") ----------------------------------------- it is not clear for me how to use this. So it seems that the luatex reference is useless for a context user. Is there an other documentation on this? I have found an other mechanism in 'luat-cbk.lua' which offers a pair of functions 'callbacks.push()' and 'callbacks.pop()'. But I have not made any attempts to use them. Are they useable or are they disabled too? Wolfgang

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Re: [NTG-context] How can one center or align a float?
by Vyatcheslav Yatskovsky 09 Apr '10

09 Apr '10

Hi, > How is it possible to have a STEPchart be midaligned, or right-aligned, Another way: \startnarrower[6*left] \getbuffer \stopnarrower -- Best Regards, Vyatcheslav Yatskovsky

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