Created
November 19, 2011 20:10
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ConTeXt module for drawing hooked lines
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\unprotect | |
% Override default value in pack-fen.mkiv | |
\def\setinstalledframedimensions | |
{\edef\overlaywidth {\the\frameddimenwd\space}% | |
\edef\overlayheight{\the\dimexpr\frameddimenht+\frameddimendp\relax\space}% | |
\edef\overlaydepth {\the\frameddimendp\space}% | |
\edef\overlaycolor {\framedparameter\c!backgroundcolor}% | |
\edef\overlaylinecolor{\framedparameter\c!framecolor}% | |
\edef\overlaylinewidth{\the\ruledlinewidth}} | |
% Hooked fences: lefthook, righthook, tophook, and bottomhook. | |
% The parameter \type{radius} determine the radius of the hook. | |
% The parameter \type{hook} determines the length of the hook. | |
\startMPextensions | |
vardef BasicHook (expr size, radius, hook) = | |
((0,0) --- (size - radius, 0){right} .. {up}(size, radius) --- (size, hook)) | |
enddef; | |
\stopMPextensions | |
\startuseMPgraphic{bottom_right_hook} | |
save radius, hook ; | |
radius := \the\dimexpr\framedparameter\c!frameradius\relax; | |
hook := \the\dimexpr\framedparameter{hook}\relax; | |
draw BasicHook(OverlayWidth, radius, hook) | |
withpen pencircle scaled OverlayLineWidth | |
withcolor OverlayLineColor; | |
setbounds currentpicture to OverlayBox; | |
\stopuseMPgraphic | |
\startuseMPgraphic{bottom_left_hook} | |
save radius, hook ; | |
radius := \the\dimexpr\framedparameter\c!frameradius\relax; | |
hook := \the\dimexpr\framedparameter{hook}\relax; | |
draw BasicHook(OverlayWidth, radius, hook) | |
reflectedabout ((0.5OverlayWidth, 0), (0.5OverlayWidth, OverlayHeight)) | |
withpen pencircle scaled OverlayLineWidth | |
withcolor OverlayLineColor; | |
setbounds currentpicture to OverlayBox; | |
\stopuseMPgraphic | |
\startuseMPgraphic{top_right_hook} | |
save radius, hook ; | |
radius := \the\dimexpr\framedparameter\c!frameradius\relax; | |
hook := \the\dimexpr\framedparameter{hook}\relax; | |
draw BasicHook(OverlayWidth, radius, hook) | |
reflectedabout ((0,0),(OverlayWidth,0)) | |
shifted (0,OverlayHeight) | |
withpen pencircle scaled OverlayLineWidth | |
withcolor OverlayLineColor; | |
setbounds currentpicture to OverlayBox; | |
\stopuseMPgraphic | |
\startuseMPgraphic{left_top_hook} | |
save radius, hook ; | |
radius := \the\dimexpr\framedparameter\c!frameradius\relax; | |
hook := \the\dimexpr\framedparameter{hook}\relax; | |
draw BasicHook(OverlayWidth, radius, hook) | |
reflectedabout ((0.5OverlayWidth, 0), (0.5OverlayWidth, OverlayHeight)) | |
reflectedabout ((0,0),(OverlayWidth,0)) | |
shifted (0,OverlayHeight) | |
withpen pencircle scaled OverlayLineWidth | |
withcolor OverlayLineColor; | |
setbounds currentpicture to OverlayBox; | |
\stopuseMPgraphic | |
\startuseMPgraphic{left_bottom_hook} | |
save radius, hook ; | |
radius := \the\dimexpr\framedparameter\c!frameradius\relax; | |
hook := \the\dimexpr\framedparameter{hook}\relax; | |
draw BasicHook(OverlayHeight, radius, hook) | |
rotated -90 | |
shifted (0,OverlayHeight) | |
withpen pencircle scaled OverlayLineWidth | |
withcolor OverlayLineColor; | |
setbounds currentpicture to OverlayBox; | |
\stopuseMPgraphic | |
\startuseMPgraphic{left_top_hook} | |
save radius, hook ; | |
radius := \the\dimexpr\framedparameter\c!frameradius\relax; | |
hook := \the\dimexpr\framedparameter{hook}\relax; | |
draw BasicHook(OverlayHeight, radius, hook) | |
reflectedabout ((0,0),(OverlayWidth,0)) | |
rotated 90 | |
withpen pencircle scaled OverlayLineWidth | |
withcolor OverlayLineColor; | |
setbounds currentpicture to OverlayBox; | |
\stopuseMPgraphic | |
\startuseMPgraphic{right_top_hook} | |
save radius, hook ; | |
radius := \the\dimexpr\framedparameter\c!frameradius\relax; | |
hook := \the\dimexpr\framedparameter{hook}\relax; | |
draw BasicHook(OverlayHeight, radius, hook) | |
rotated 90 | |
shifted (OverlayWidth,0) | |
withpen pencircle scaled OverlayLineWidth | |
withcolor OverlayLineColor; | |
setbounds currentpicture to OverlayBox; | |
\stopuseMPgraphic | |
\startuseMPgraphic{right_bottom_hook} | |
save radius, hook ; | |
radius := \the\dimexpr\framedparameter\c!frameradius\relax; | |
hook := \the\dimexpr\framedparameter{hook}\relax; | |
draw BasicHook(OverlayHeight, radius, hook) | |
reflectedabout ((0,0),(OverlayWidth,0)) | |
rotated -90 | |
shifted (OverlayWidth,OverlayHeight) | |
withpen pencircle scaled OverlayLineWidth | |
withcolor OverlayLineColor; | |
setbounds currentpicture to OverlayBox; | |
\stopuseMPgraphic | |
\installtopframerenderer {righthook}{\useMPgraphic{top_right_hook}} | |
\installtopframerenderer {lefthook}{\useMPgraphic{top_left_hook}} | |
\installbottomframerenderer {righthook}{\useMPgraphic{bottom_right_hook}} | |
\installbottomframerenderer {lefthook}{\useMPgraphic{bottom_left_hook}} | |
\installleftframerenderer {bottomhook}{\useMPgraphic{left_bottom_hook}} | |
\installleftframerenderer {tophook}{\useMPgraphic{left_top_hook}} | |
\installrightframerenderer {bottomhook}{\useMPgraphic{right_bottom_hook}} | |
\installrightframerenderer {tophook}{\useMPgraphic{right_top_hook}} | |
\setupframed | |
[hook=\framedparameter\c!radius] | |
\protect | |
\continueifinputfile{meta-imp-hooks.mkiv} | |
\setupcolors[state=start] | |
% \setupframed[offset=none] | |
\starttext | |
\framed[frame=off,bottomframe=righthook]{Bottom right hook} | |
\framed[frame=off,bottomframe=lefthook,rulethickness=2bp]{Bottom left hook} | |
\blank | |
\framed[frame=off,topframe=righthook,rulethickness=2bp]{Top right hook} | |
\blank | |
\framed[frame=off,topframe=lefthook,rulethickness=2bp]{Top left hook} | |
\framed[frame=off,bottomframe=righthook,framecolor=green,rulethickness=2bp]{Changing colors} | |
\framed[align=normal,frame=off, hook=1cm, leftframe=bottomhook]{\input zapf \endgraf} | |
\blank | |
\framed[align=normal,frame=off, hook=1cm, leftframe=tophook]{\input zapf \endgraf} | |
\blank | |
\framed[align=normal,frame=off, hook=1cm, rightframe=tophook]{\input zapf \endgraf} | |
\blank | |
\framed[align=normal,frame=off, hook=1cm, rightframe=bottomhook]{\input zapf \endgraf} | |
\stoptext | |
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