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% \iffalse meta-comment
%
% Copyright (C) 2010 by Ulrich M. Schwarz
% See file COPYING for more details.
%\fi
%
%\iffalse (hide this from DocInput)
%<*shaded>
%\fi
% \begin{macrocode}
\define@key{thmdef}{shaded}[{}]{%
\thmt@trytwice{}{%
\RequirePackage{shadethm}%
\RequirePackage{thm-patch}%
\addtotheorempreheadhook[\thmt@envname]{%
\setlength\shadedtextwidth{\linewidth}%
\kvsetkeys{thmt@shade}{#1}\begin{shadebox}}%
\addtotheorempostfoothook[\thmt@envname]{\end{shadebox}}%
}%
}
% There are some parameters you could set the default for (try them as is,
% first).
% (i) shadethmcolor The shading color of the background. See the
% documentation for the color package, but with a `gray' model, I find .97
% looks good out of my printer, while a darker shade like .92 is needed
% to make it copy well. (Black is 0, white is 1.)
% (i*) shaderulecolor The shading color of the border of the shaded box.
% See (i). If \shadeboxrule is set to 0pt then this won't print anyway.
% (i**) shadeboxrule The width of the border around the shading. Set it to
% 0pt (not just 0) to make it disappear.
% (i***) shadeboxsep The length by which the shade box surrounds the text.
\define@key{thmt@shade}{textwidth}{\setlength\shadedtextwidth{#1}}
\define@key{thmt@shade}{bgcolor}{\thmt@definecolor{shadethmcolor}{#1}}
\define@key{thmt@shade}{rulecolor}{\thmt@definecolor{shaderulecolor}{#1}}
\define@key{thmt@shade}{rulewidth}{\setlength\shadeboxrule{#1}}
\define@key{thmt@shade}{margin}{\setlength\shadeboxsep{#1}}
\def\thmt@colorlet#1#2{%
%\typeout{don't know how to let color `#1' be like color `#2'!}%
\@xa\let\csname\string\color@#1\@xa\endcsname
\csname\string\color@#2\endcsname
% this is dubious at best, we don't know what a backend does.
}
\AtBeginDocument{%
\ifcsname colorlet\endcsname
\let\thmt@colorlet\colorlet
\fi
}
\def\thmt@drop@relax#1\relax{}
\def\thmt@definecolor#1#2{%
\thmt@def@color{#1}#2\thmt@drop@relax
{gray}{0.5}%
\thmt@colorlet{#1}{#2}%
\relax
}
\def\thmt@def@color#1#2#{%
\definecolor{#1}}
% \end{macrocode}
%\iffalse (hide this from DocInput)
%</shaded>
%\fi
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