[NTG-context] Color in an environment

[Wolfgang Schuster]

> Am 29.03.2015 um 22:05 schrieb Fabrice Couvreur <fabrice1.couvreur at gmail.com>:
> 
> Hi,
> 
> 1. In the following code, the color is not included in the \startframedtext  \stopframedtext environment

Remove the \MPcolor command, it is only needed for meatiest graphics.

You can also remove \setupcolors[state=start] because MkIV enables colors by default.

> 2. How can the height of the red square adapts to the height of the text ?

You can use the \htofstring command to get the height of a character but the command
accepts only text and you can’t use color or font settings in the argument.

> 3. Can we improve the code ?


Use keys to set the colors for all elements, you can also remove the \feature command
because settings small caps for uppercase text is useless. You should also create
a real command for the headcommand key because there can be problems when
context checks for the value of the key.


\definecolor[mycolor][c=0.00, m=0.10, y=0.20, k=0.00]

\define\DefinitionHeadcommand
  {\blackrule
     [ color=red,
       width=\htofstring{D},% width=\htofstring{\enumerationparameter{text}},
      height=\htofstring{D}]%
   \thinspace}

\defineenumeration
  [definition]
  [text={DÉFINITION : },
   headstyle=bold,
   headcommand=\DefinitionHeadcommand,
   headcolor=blue,
   titlecolor=red,
   width=fit,
   alternative=top,
   title=yes,
   titleright=,
   titleleft=,
   before={\startframedtext[width=\textwidth,frame=off,background=color,backgroundcolor=mycolor]},
   after={\stopframedtext}]

\starttext
\startdefinition{Expérience aléatoire}
Une {\bf expérience aléatoire} est une expérience renouvelable dont les résultats possibles sont connus sans qu'on puisse déterminer lequel sera réalisé.
\stopdefinition
\stoptext


Wolfgang