Re: Passing the parameters of a frame in an environment \startMPcode ... \stopMPcode

[Wolfgang Schuster <wolfgang.schuster.lists@gmail.com>]

Rudolf Bahr schrieb am 20.04.2020 um 10:23:
> 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.

I wrote the example without TeXpage where I needed \doneleavehmode to 
keep all cards on the same line. At the end I just added TeXpage to 
create a cropped image with with a small border and forgot to remove it.

Wolfgang

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