Re: getvariable

[Peter Rolf <indiego@gmx.net>]

Thomas A. Schmitz wrote:
> Peter, I appreciate your helping me. And I have no clue what's going 
> wrong.
> On Oct 6, 2005, at 10:08 PM, Peter Rolf wrote:
> 
>>>
>> I'm just guessing (taken from my own pile of mistakes).
>> Hmm, is it a problem of setting the variable, or it's interpretation?
>> Can you find out, if the variable is set correctly in your \setupcrop
>> macro? Just add
>>
>> \writestatus{[CROP]}{crop mark is: \getvariable{Crop}{mark}}%
> 
> 
> For debugging, I've narrowed the module down to 8 lines:
> 
> \def\setupcrop{\setvariables[Crop]}
> 
Is that all \setupcrop does? :)
It's a bit hard for me to debug your code from parts, without seeing
all. But anyway, here is the way I would handle such stuff. Not tested!

...
% trigger for printing crop info
\newconditional\CropInfo

\def\SetupCrop{\dosingleempty\doSetupCrop}

\def\doSetupCrop[#1]{%
  \iffirstargument
    \getrawparameters[CROP@][{mark=,info=},#1]%
    \processaction[\CROP@mark][
      camera=>{\setvariables[Crop][mark=camera]
	\def\PageBackground{\CameraMarks}},
      cross=>{\setvariables[Crop][mark=cross]
	\def\PageBackground{\CrossMarks}},
      default=>{\setvariables[Crop][mark=]
	\def\PageBackground{}},
      unknown=>{\setvariables[Crop][mark=]
	\def\PageBackground{}}]%
    % no need to store this into a variable
    \processaction[\CROP@info][
      no=>\setfalse\CropInfo,
      default=>\settrue\CropInfo,
      unknown=>\settrue\CropInfo]%
  \else
  % \SetupCrop is called without parameters
    \setvariables[Crop][mark=]
    \setfalse\CropInfo
    \def\PageBackground{}%
  \fi
  % just to give the idea...
  \ifconditional\CropInfo
    \setlayer[markings][x=.5\paperwidth, y=20mm, location=c]%
    {\tt \txx "\jobname" - \currentdate [y,/,mm,/,dd]\ - \currenttime\ -
\realfolio\ of \lastpage}
%  \else
  \fi
% for debugging only
\writestatus{[CROP]}{crop mark is: \getvariable{Crop}{mark}}%
\writestatus{}{crop info is \ifconditional\CropInfo\ enabled\else\
disabled}%
}

\SetupCrop % initialisation (or \setups[namespace:reset])
...

I have no experience with the namespace mechanism Hans mentioned (will
give it a try/ add it to the wiki).

HTH,

Peter

> \setvariables[Crop][mark=cross,info=yes]
> 
> \processaction[\getvariable{Crop}{mark}][
>   camera =>\def\PageBackground{\CameraMarks},
>   cross  =>\def\PageBackground{\CrossMarks},
>   default=>\def\PageBackground{},
>   unknown=>\def\PageBackground{}]%
> 
> \writestatus{[CROP]}{crop mark is: \getvariable{Crop}{mark}}
> 
> my testfile:
> 
> \usemodule[t-crop]
> \setupcrop[mark=camera,info=yes]
> 
> \starttext
> 
> Hello!
> 
> \stoptext
> 
> Output in log:
> 
> (/Users/tas/Library/texmf/tex/t-crop.tex
> [CROP]          : crop mark is: cross
> 
> If second line of module is commented out, I get:
> 
> [CROP]          : crop mark is:
> 
> So it's a problem of actually setting the variable.
> 
>>
>>
>> The error can't hide forever ;)
>>
> Maybe it can't hide forever, but it looks like it can run...
> 
> Thanks for your help. I'll be away tomorrow and will try more on the 
> weekend.
> 
> Best
> 
> Thomas
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