MetaFun - Pragma ADE

182
meta:hash:linecolor=darkyellow]
left \par \& \par right \eTD
\bTD[background={meta:hash:horizontal,meta:hash:vertical},
meta:hash:linecolor=darkred]
horizontal \par \& \par vertical \eTD
\eTR
\eTABLE
The long names are somewhat cumbersome, but in that way we can prevent name clashes. Also,
since the METAPOST interface is english, the variables are also english.
7.5 Symbol collections
left
&
right
horizontal
&
vertical
Table 7.3 A double
hashed table.
In CONTEXT, a symbol can be defined without much coding. The advantage of using symbols is
that you can redefine them depending on the situation. So,
\definesymbol [yes] [\em Yes!]
creates a symbol, that lets \symbol[yes] expand into Yes! Since nearly anything can be a symbol,
we can also say:
\definesymbol [yes] [\mathematics{\star}]
or even the already defined symbol ⋆, by saying:
\definesymbol [yes] [{\symbol[star]}]
It may be clear that we can use a graphic as well:
\def\metabuttonsymbol#1{\uniqueMPgraphic{meta:button}{type=#1}}
\definesymbol[menu:left] [\metabuttonsymbol{101}]
\definesymbol[menu:right] [\metabuttonsymbol{102}]
\definesymbol[menu:list] [\metabuttonsymbol{103}]
\definesymbol[menu:index] [\metabuttonsymbol{104}]
\definesymbol[menu:person][\metabuttonsymbol{105}]
\definesymbol[menu:stop] [\metabuttonsymbol{106}]
\definesymbol[menu:info] [\metabuttonsymbol{107}]
\definesymbol[menu:down] [\metabuttonsymbol{108}]
\definesymbol[menu:up] [\metabuttonsymbol{109}]
\definesymbol[menu:print] [\metabuttonsymbol{110}]
Shapes, symbols and buttons Symbol collections