Re: [NTG-context] Label loops within a XeConTeXt document

23 Jun 2007


      On Sat, 23 Jun 2007, nicola wrote:
...
In article ,
Aditya Mahajan  wrote:
...
On Sat, 23 Jun 2007, nicola wrote:
...
Hi,
given the following XeConTeXt document (I use ConTeXt  ver: 2007.01.12):
\definetypeface[MyMainFace][rm][Xserif][Charis SIL][default][encoding=uc]
\definetypeface[MyMainFace][mm][math][euler][euler]
\setupbodyfont[MyMainFace,10pt]
\startuseMPgraphic{foo}
  for i = 0 upto 10:
     % Draw a label at position (i*cm,0)
  endfor;
\stopuseMPgraphic
\starttext
\midaligned{\useMPgraphic{foo}}
\stoptext
is it possible to replace the comment with an instruction (or a macro),
such that I do not get compilation errors and I get consistent font
usage?
I have tried the following possibilities:
a) label("test",(i*cm,0)); % Complains about missing metrics for font
b) label(\textext{test},(i*cm,0)); % Ditto
This is strange. Do you also get this error if you use pdftex instead
of xetex?
...
c) label(btex test $x$ etex,(i*cm,0));  % Results in wrong font
d) label(\sometxt{test},(i*cm,0)); % Ok, right font, but loop is ignored
The best option to my knowledge is \sometxt, but I have read that it
cannot be used in loops. Before I start unrolling all the loops in my
figures
1) is it possible to specify the fonts in an MPenviroment? If so, how?
Just as you will specify fonts in your regular document.
Putting the same definitions inside \startMPinclusions...
\stopMPinclusions does not seem to work with XeTeX.
It is MPenvironent and not MPinclusions. I do not have xetex, so I 
can not test this.
...
...
Have you checked \startTeXtexts ...\stopTeXtexts? See Section 4.4 of
Mojca's MyWay on \sometxt
(http://dl.contextgarden.net/myway/sometxt.pdf)
Ah, I did not know about those commands: that works! Just a silly
question, though: how do I change
\startTeXtexts
  \dorecurse{10}{\TeXtext{\recurselevel}{$x_{\recurselevel}$}}
\stopTeXtexts
so that I can print labels from x_0 up to x_9? Do I need to use
\defineconversion and \convertnumber?
No, use \dostepwiserecuse. The general syntax is

\dostepwiserecurse {from} {to} {step} {action}

so

\dostepwiserecurse {0} {9} {1} 
{\TeXtext{\recurselevel}{$x_{\recurselevel}$} should work.

Aditya