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%D \module
%D [ file=meta-imp-fen,
%D version=2011.07.21,
%D title=\METAPOST\ Graphics,
%D subtitle=Fences,
%D author=Wolfgang Schuster & Hans Hagen,
%D date=\currentdate,
%D copyright={PRAGMA ADE \& \CONTEXT\ Development Team}]
%C
%C This module is part of the \CONTEXT\ macro||package and is
%C therefore copyrighted by \PRAGMA. See mreadme.pdf for
%C details.
%D The shape and background example code was posted by Wolfgang on the
%D \CONTEXT\ list and due to request by Aditya has been turned into
%D library.
\startMPextensions
vardef BasicBraceSymbol (expr rotation) =
save p ; path p ;
z1 = (-233, 0) ;
z2 = (-220, 22) ;
z3 = (-155, 211) ;
z4 = (-200, 690) ;
z5 = (-142, 1033) ;
z6 = ( -97, 1106) ;
z7 = ( -71, 1125) ;
z8 = ( -61, 1104) ;
z9 = ( -80, 1077) ;
z10 = (-108, 1002) ;
z11 = (-129, 666) ;
z12 = (-117, 207) ;
z13 = (-197, 19) ;
z14 = (-208, 0) ;
z15 = (-197, -19) ;
z16 = (-117, -207) ;
z17 = (-129, -666) ;
z18 = (-108,-1026) ;
z19 = ( -80,-1077) ;
z20 = ( -61,-1104) ;
z21 = ( -71,-1125) ;
z22 = ( -97,-1106) ;
z23 = (-143,-1031) ;
z24 = (-199, -673) ;
z25 = (-155, -211) ;
z26 = (-220, -22) ;
p := z1 for i= 2 upto 14 : .. z[i] endfor
& z14 for j=15 upto 26 : .. z[j] endfor
.. z1
& cycle ;
p := p rotated rotation ;
p := p ysized 100 ;
p shifted - center p
enddef ;
vardef RawLeftBraceSymbol =
fill BasicBraceSymbol(0) ysized OverlayHeight withcolor OverlayColor ;
enddef ;
vardef RawRightBraceSymbol =
fill BasicBraceSymbol(180) ysized OverlayHeight withcolor OverlayColor ;
enddef ;
vardef RawTopBraceSymbol =
fill BasicBraceSymbol(270) xsized OverlayWidth withcolor OverlayColor ;
enddef ;
vardef RawBottomBraceSymbol =
fill BasicBraceSymbol(90) xsized OverlayWidth withcolor OverlayColor ;
enddef ;
vardef LeftBraceSymbol =
save p, b ; path p, b ; b := fullsquare xscaled OverlayWidth yscaled OverlayHeight ;
setbounds currentpicture to b ;
p := BasicBraceSymbol(0) ysized OverlayHeight ;
fill p shifted (-xpart lrcorner currentpicture + xpart lrcorner p,0) withcolor OverlayColor ;
setbounds currentpicture to b ;
enddef ;
vardef RightBraceSymbol =
save p, b ; path p, b ; b := fullsquare xscaled OverlayWidth yscaled OverlayHeight ;
setbounds currentpicture to b ;
p := BasicBraceSymbol(180) ysized OverlayHeight ;
fill p shifted (xpart lrcorner currentpicture - xpart lrcorner p,0) withcolor OverlayColor ;
setbounds currentpicture to b ;
enddef ;
vardef TopBraceSymbol =
save p, b ; path p, b ; b := fullsquare xscaled OverlayWidth yscaled OverlayHeight ;
setbounds currentpicture to b ;
p := BasicBraceSymbol(270) xsized OverlayWidth ;
fill p shifted (0,ypart ulcorner currentpicture - ypart ulcorner p) withcolor OverlayColor ;
setbounds currentpicture to b ;
enddef ;
vardef BottomBraceSymbol =
save p, b ; path p, b ; b := fullsquare xscaled OverlayWidth yscaled OverlayHeight ;
setbounds currentpicture to b ;
p := BasicBraceSymbol(90) xsized OverlayWidth ;
fill p shifted (0,ypart lrcorner currentpicture - ypart lrcorner p) withcolor OverlayColor ;
setbounds currentpicture to b ;
enddef ;
\stopMPextensions
\startuniqueMPgraphic{raw_brace_left} RawLeftBraceSymbol ; \stopuniqueMPgraphic
\startuniqueMPgraphic{raw_brace_right} RawRightBraceSymbol ; \stopuniqueMPgraphic
\startuniqueMPgraphic{raw_brace_top} RawTopBraceSymbol ; \stopuniqueMPgraphic
\startuniqueMPgraphic{raw_brace_bottom} RawBottomBraceSymbol ; \stopuniqueMPgraphic
\startuniqueMPgraphic{brace_left} LeftBraceSymbol ; \stopuniqueMPgraphic
\startuniqueMPgraphic{brace_right} RightBraceSymbol ; \stopuniqueMPgraphic
\startuniqueMPgraphic{brace_top} TopBraceSymbol ; \stopuniqueMPgraphic
\startuniqueMPgraphic{brace_bottom} BottomBraceSymbol ; \stopuniqueMPgraphic
\defineoverlay[leftbrace] [\uniqueMPgraphic{brace_left}]
\defineoverlay[rightbrace] [\uniqueMPgraphic{brace_right}]
\defineoverlay[topbrace] [\uniqueMPgraphic{brace_top}]
\defineoverlay[bottombrace][\uniqueMPgraphic{brace_bottom}]
\installleftframerenderer {brace}{\uniqueMPgraphic{raw_brace_left}}
\installrightframerenderer {brace}{\uniqueMPgraphic{raw_brace_right}}
\installtopframerenderer {brace}{\uniqueMPgraphic{raw_brace_top}}
\installbottomframerenderer{brace}{\uniqueMPgraphic{raw_brace_bottom}}
\continueifinputfile{meta-imp-fen.mkiv}
\starttext
\startTEXpage[offset=10pt]
\framed
[offset=1ex,
leftframe=brace,
rightframe=brace,
topframe=brace,
bottomframe=brace,
background=color,
backgroundcolor=red]
{OEPS}
\stopTEXpage
\startTEXpage \uniqueMPgraphic{brace_left} \stopTEXpage
\startTEXpage \uniqueMPgraphic{brace_right} \stopTEXpage
\startTEXpage \uniqueMPgraphic{brace_top} \stopTEXpage
\startTEXpage \uniqueMPgraphic{brace_bottom} \stopTEXpage
\framedtext
[frame=off,
offset=2em,
background={leftbrace,rightbrace,topbrace,bottombrace},
backgroundcolor=red]{\input{knuth}}
\setupTABLE[frame=off,offset=1ex]
\setupTABLE[row][each][align={middle,lohi}]
\bTABLE
\bTR
\bTD[nr=3,background=leftbrace] drei \eTD
\bTD[nr=2,background=leftbrace] zwei \eTD
\bTD f \eTD
\bTD o \eTD
\bTD u \eTD
\bTD r \eTD
\bTD [nr=3,background=rightbrace] three \eTD
\eTR
\bTR
\bTD [background=leftbrace] eins \eTD
\bTD [background={topbrace,bottombrace}] null \eTD
\bTD [background=rightbrace] one \eTD
\bTD [nr=2,background=rightbrace] two \eTD
\eTR
\bTR
\bTD v \eTD
\bTD i \eTD
\bTD e \eTD
\bTD r \eTD
\eTR
\eTABLE
\stoptext
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