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% content=tex
%
% copyright=pragma-ade readme=readme.pdf licence=cc-by-nc-sa
\environment columnsets-000
\startuseMPgraphic{mpos:par:columns}
path p ; numeric h ;
for i=1 upto nofmultipars :
p := multipars[i] ;
h := bbheight(p) ;
if multikind[i] = "single" :
fill p topenlarged -.5h
withshademethod "linear"
withshadedirection shadedup
withcolor \MPcolor{color-1} shadedinto white ;
fill p bottomenlarged -.5h
withshademethod "linear"
withshadedirection shadedup
withcolor white shadedinto \MPcolor{color-1} ;
elseif multikind[i] = "first" :
fill p
withshademethod "linear"
withshadedirection shadedup
withcolor \MPcolor{color-2} shadedinto white ;
elseif multikind[i] = "middle" :
fill p topenlarged -.5h
withshademethod "linear"
withshadedirection shadedup
withcolor \MPcolor{color-2} shadedinto white ;
fill p bottomenlarged -.5h
withshademethod "linear"
withshadedirection shadedup
withcolor white shadedinto \MPcolor{color-3} ;
elseif multikind[i] = "last" :
fill p
withshademethod "linear"
withshadedirection shadedup
withcolor white shadedinto \MPcolor{color-3} ;
fi ;
endfor ;
\stopuseMPgraphic
\definecolumnset
[example]
[n=4,
page=left]
\definetextbackground
[shade]
[location=paragraph,
mp=mpos:par:columns,
before=\blank,
after=\blank]
\starttext
\startcolumnset[example]
\dorecurse {40} {
\starttextbackground[shade]
\fakewords{10}{200}
\stoptextbackground
\par
}
\stopcolumnset
\stoptext
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