On 11/26/2013 7:59 AM, "H. Özoguz" wrote:
Hello there,

I am new in variables in ConTeXt, so I tried the the following example
of two font-sizes wich should have a ratio of 0.7:

\setvariables[fontsize][bigsize=17pt]
\setvariables[fontsize][smallsize=0.7\getvariable{fontsize}{size}]

\definefont[big][name:arial at \getvariable{fontsize}{bigsize}]
\definefont[small][name:arial at \getvariable{fontsize}{smallsize}]

\starttext
\big Dies ist ein großer Text.\blank
\small Dies ist ein kleiner Text.
\stoptext

That does not work, what is the correct syntax?

should be: "what is my error?" ...

\setvariables[fontsize][smallsize=0.7\getvariable{fontsize}{bigsize}]

(size -> bigsize)

but then the next hurdle is that you get 0.717pt so you need

\setvariables[fontsize][smallsize=\the\dimexpr0.7\dimexpr\getvariable{fontsize}{bigsize}\relax\relax]

which is why the next is better:

\definemeasure[fontsize:big]  [17pt]
\definemeasure[fontsize:small][0.7\measured{fontsize:big}]

\definefont[big]  [name:arial at \measure{fontsize:big}]
\definefont[small][name:arial at \measure{fontsize:small}]

\starttext
    \big   Dies ist ein großer  Text. \blank
    \small Dies ist ein kleiner Text.
\stoptext

Best wikify this!

Alternatively you can set up symbolic sizes (like we already have a b c d), so that

\definefont[big]  [name:arial sa a]

etc can be used

Hans

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