Am 01.04.2011 11:39, schrieb Tim Steenvoorden:
> Dear list,
> 
> I'm trying to make some fancy chapter headers. With MetaPost I drew a
> wave, which I'd like to place in the margin. I've read details.pdf and
> metafun.pdf, but I don't manage to get the positioning right. The wave
> should begin where the bottomframe ends and move on to the page
> border. Also, the graphic is placed in the page background layer, but
> nevertheless the text after the the graphic is shifted down.
>
> \startuniqueMPgraphic{wave}
> numeric periods, width;
> path wave;
> periods := 3 + 1/4;
> width   := periods * 2*pi;
> wave    := origin for x=0 step 0.1 until width:
>              -- (x,x*sin(x))
>            endfor;
> pickup pencircle scaled 1pt;
> draw wave xscaled (OverlayWidth/width) yscaled (OverlayHeight/(2*width));
> \stopuniqueMPgraphic
> 
> \definelayer[decorations][position=yes,option=test,location=r]
> \setupbackgrounds[page][background=decorations]
> \defineoverlay[wave][\uniqueMPgraphic{wave}]
> 
> \starttext
> 
> {\ss\bfc A chapter title}
> \blank[small]
> \framed[frame=off,bottomframe=on,width=broad,rulethickness=1pt]
>  {\ss\bfx \date \hfill Author Name}
> \setlayer[decorations]{\framed[background=wave,frame=off,width=\cutspace,height=2\lineheight]{}}
> 
> \input knuth
> 
> \stoptext
> 
> What am I doing wrong? Is it a better idea to draw the bottomframe in
> MetaPost too? How do I take care of positioning in that case? Absolute
> positioning is not an option, because the length of the chapterheads
> can be two lines. It should also work on other paper sizes (A5 in
> particular).
>
Don't ask me. I have no experience with layers in combination with
'position=yes'. Anyhow, IMO it's much easier to draw all in one graphic
than try to attach the MP graphic with the frame(d) border. Also: I have
no idea how to do it :-)

I attached a working example, but it's more a starting point than a
final solution.

Best wishes,  Peter

> Kind regards,
> Tim Steenvoorden
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