Re: [NTG-context] Metafun textext()

[Hans Hagen]

On 1/10/2013 2:18 PM, Aditya Mahajan wrote:

On Thu, 10 Jan 2013, Alan BRASLAU wrote:

On Thu, 10 Jan 2013 06:51:50 -0500
Aditya Mahajan <adit...@umich.edu> wrote:

Since the beginning of MkIV, colors in metapost labels need to be set at
the ConTeXt end (Untested):

T := thelabel(textext("\color[blue]{I'm seeing double}"), origin);

Aditya

I don't believe that this is true, but I am most likely wrong.

Well, I think it was true in the beginning (as I remember a discussion
from Mojca on how to handle labels differently in the gnuplot module),
but clearly that is not the case now.

Indeed "\blue text" has worked, but 'draw T withcolor blue;' *should*
work as well.
The processing of textext() has changed recently, it seems.

The mkiv implementation has always been rather different from the mkii one: text handling as well as dealing with colors.

\startMPcode
label(textext("I'm seeing double"),origin)     withcolor green ;
label(textext("I'm seeing double"),(-1mm,1mm)) withcolor blue ;
\stopMPcode

DOES work.

Of course, these are much simplified minimal examples of what I would
like to do.

Minimal example to show what is happening:

\startbuffer[initialize]
   picture T;
   T := textext("Hello");

   picture Q;
   Q := T;
\stopbuffer

\startbuffer[T]
   draw T withcolor blue;
\stopbuffer

\startbuffer[Q]
   draw Q shifted (-1mm, 1mm) withcolor red;
\stopbuffer

\startlines
Only draw T: \processMPbuffer[initialize,T]
Only draw Q: \processMPbuffer[initialize,Q]
Draw T & Q : \processMPbuffer[initialize,T,Q]
Draw Q & T : \processMPbuffer[initialize,Q,T]
\stoplines

You and Alan can pick up the beta from the ftp server and play with this:

\setupbodyfont[dejavu]

\starttext

\startMPpage[offset=10pt]

    picture MyText ; MyText := textext("Dummy") ; % not used later on

    picture MyText ; MyText := textext("\red Red") ;

    draw MyText ;

    draw MyText scaled 2 shifted (0,-1cm) ;

    draw MyText scaled 3 shifted (0,-2cm) ;

    picture MyText ; MyText := textext("Blue Green Red") ;



    draw MyText shifted (0,-4cm) withcolor green ;



    picture MyText ; MyText := image (
        draw textext("Green Red Blue {\yellow YELLOW} Whatever 1") ;

    ) ;

    draw MyText shifted (0,-6cm) withcolor green ;

    draw MyText shifted (0,-7cm) withcolor red ;

    draw MyText shifted (0,-8cm) withcolor blue ;

\stopMPpage

\stoptext



Hans
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draw MyText rotatedaround(center MyText,10) shifted (0,-3cm) withcolor blue ; draw MyText rotatedaround(center MyText,-10) shifted (0,-5cm) withcolor red ; draw textext("Green Red Blue {\yellow YELLOW} Whatever 2") shifted (10cm,0) ; The complication is that we reuse a picture which once defined has frozen properties. However, after hours of lua/tex juggling I managed to made a variant that better keeps track of applied colors. I'm not sure if this is foolproof but it's probably quite ok for what Alan wants to do. Although ... being a scientist he will look for the next frontier ... (or even more scientific: try to prove me wrong).

textext-002.pdf
Description: Adobe PDF document

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