nico wrote:
> Hello,
>
> For those who know, I'm trying to have the DocBook callout mechanism with
> context. Basically, there are some numbers in lines of verbatim text, and
> below the verbatim text the numbers are used to explain the portion of the
> text (kind of footnote). Typically the numbers are rendered white in black
> circle. I could use the Dingbats numbers, but it is limited to 10, so that
> I emulated them with the following code to be able to go up to 99.
>
> The questions I have:
> - Is it the right way to do it in context (do I really need metafont?
> Simpler, smarter method?)
> - What should I do to make them as anchors, so that it can be
> cross-referenced (I mean, one can click on a hot spot that jump to the
> number in the verbatim text).
>
> Thanks for any hint,
>
> \newdimen \cowidth
>
> % Maximum size of the circle fits for number 99
> \def\evalwidth%
> {\bgroup%
> \setbox0\hbox{\small\bf{\ss 99}}%
> \global\cowidth=1.2\wd0%
> \egroup}
>
> % Background black circle
> \startuniqueMPgraphic{CoCircle}
> fill fullcircle scaled \overlaywidth withcolor black ;
> \stopuniqueMPgraphic
>
> \defineoverlay[cocircle][\uniqueMPgraphic{CoCircle}]
>
> % Display the black circled number
> \def\conum#1%
> {\evalwidth%
> \framed[background=cocircle,strut=no,frame=off,
> width=\the\cowidth,height=\the\cowidth,offset=overlay]
> {\color[white]{\small\bf{\ss #1}}}}
>
> \starttext
>
> \dorecurse{99}{\conum{\recurselevel}, }
>
> \stoptext
>
\setupcolors[state=start]
\startuniqueMPgraphic{CoCircle}
fill fullcircle xysized (OverlayWidth,OverlayHeight) withcolor OverlayColor ;
\stopuniqueMPgraphic
\defineoverlay[cocircle][\uniqueMPgraphic{CoCircle}]
\definecolor[CoBackgroundColor] [red]
\definecolor[CoForegroundColor] [white]
\def\conum#1%
{\setbox\scratchbox\hbox
{\small\ss\bf
\setbox\scratchbox\hbox{99}%
\hbox to 1.2\wd\scratchbox{\hss#1\hss}}%
\framed
[background=cocircle,
offset=overlay,
frame=off,
width=\the\wd\scratchbox,
height=\the\wd\scratchbox,
backgroundcolor=CoBackgroundColor,
foregroundcolor=CoForegroundColor]
{\box\scratchbox}}
\starttext
\dontleavehmode \dorecurse{99}{\conum{\recurselevel}, }
\stoptext
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Hans Hagen | PRAGMA ADE
Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
tel: 038 477 53 69 | fax: 038 477 53 74 | www.pragma-ade.com
| www.pragma-pod.nl
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