[NTG-context] Passing the parameters of a frame in an environment \startMPcode ... \stopMPcode

[Rudolf Bahr]

On Mon, Apr 20, 2020 at 09:21:41AM +0200, Wolfgang Schuster wrote:
> Fabrice Couvreur schrieb am 19.04.2020 um 22:55:
> > Hi,
> > I try to reproduce the figure as faithfully as possible. I tried for the
> > rounded corners to put the key corner = round, but it does not work.
> 
> 1. To create a new framed-instance you need \defineframe, \setupframed isn't
> enough to set the values.
> 
>    I guess you assumed this works similar to xtables but this mechanism sets
> a few values to assure \setupxtable is enough in certain cases but even here
> you need \definextable in certain cases.
> 
>    When you create a new instance you have to use the name of the new
> instance as command name, e.g. \frameletter or use the \placeframed command
> which takes the name as argument, e.g. \placeframed[frameletter].
> 
> 2. You can't pass the name of a framed-instance to \framed (backwards
> compatibility, performance ...), this is only possible with \startframed.
> 
> 3. ConTeXt uses different mechanism to draw rectangular (unless you draw a
> closed frame) and rounded frame and the mechanism for rounded frames doesn't
> work with outlinetext.
> 
> 4. To achieve the desired result you can now a) use MetaPost to draw the
> complete card (letter plus frame) or b) use only TeX to put the letter in a
> frame and rotate it.
> 
> %%%% begin tex example
> \usecolors[svg]
> 
> \defineframed
>   [frameletter]
>   [width=1.25em,
>    height=1.75em,
>    foregroundstyle=\ssbfc,
>    corner=round,
>    radius=0.1\bodyfontsize,
>    rulethickness=1pt]
> 
> \starttext
> 
> \startTEXpage[offset=\linewidth]
> \dontleavehmode
> \rotate [rotation=5] {\color[darkred]   {\frameletter{A}}}
> \rotate [rotation=-5]{\color[green]     {\frameletter{L}}}
> \rotate [rotation=5] {\color[mediumblue]{\frameletter{E}}}
> \rotate [rotation=-5]{\color[darkviolet]{\frameletter{A}}}
> \stopTEXpage
> 
> \stoptext
> %%%% end tex example
> 
> Wolfgang


Nice Example and good explanation, Wolfgang. But why did you use the command
"dontleavehmode"? It doesn't seem to be necessary in this example.

Rudolf