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% FILE ROUNDBOX.TEX, version 1.1 (14.VIII.1990)
% ------------------------------------------------------------------------
% AUTHOR:
% Garry Glendown (see in TUGboat Vol. 10 (1989) no.3 pp.386--387)
% ------------------------------------------------------------------------
% MODIFICATOR:
% B. Jackowski, Tatrza\'nska 6/1, 80-331 Gda\'nsk, POLAND
%
% Modification includes shadow boxes, possibility of defining outer
% sizes (vertical and horizontal), and possibility of choosing various
% set of corners.
% ``Degenerated'' roundboxes (rectangles) are also available,
% although because of round-off errors (or BJ errors?) they don't
% look nice sometimes.
% ------------------------------------------------------------------------
% USAGE:
% 1) thin frame (.4pt):
% \roundbox <outer size(s)> {<text>}
% \shadowbox <outer size(s)> {<text>}
% 2) thick frame (.85pt) --- see remark 4:
% \Roundbox <outer size(s)> {<text>}
% \Shadowbox <outer size(s)> {<text>}
% Outer size is optional and can have the form either `height <dimen>' or
% `width <dimen>', or both---the order does not matter. This convention
% is identical to that of `\hrule' and `\vrule'. You can even specify
% depth; however, it is ignored.
%
% Usage of these commands can be preceeded by fixing an appropriate set
% of corners:
% \setcorners <number>
% where
% -1 <= <number> <= 7
% and
% size of corner = 2*(1+<number>)pt for <number> >= 0.
%
%
% REMARKS:
% 1. <outer size(s)> is/are optional and MUST NOT appear in braces.
% 2. Errors in this parameter are not checked, hence odd results may occur.
% 3. I made some names longer and add \@ as a letter, otherwise they
% might interfere.
% 4. Thick corners are said to have line thickness 0.8pt, however the
% corrected value 0.85pt yields better results (for 300dpi fonts).
% 5. Shadows do not change the size of the box (my shadow does not increase
% my weight).
% 6. I'm not very happy about the elegancy of the code. I hope that some day
% I or somebody else will improve it.
% 7. Is it reasonable to employ also scaled circle fonts?
% ------------------------------------------------------------------------
%
\catcode`\@=11
%
% ------------------------------------------------------------------------
% DECLARATIONS
% ------------------------------------------------------------------------
%
\newbox\t@mpb@x
\newdimen\t@mpwd
\newdimen\t@mpht
\newdimen\t@mpth
%
\newdimen\xt@mpwd % used for making
\newdimen\xt@mpht % shadows instead
\newdimen\xt@mpdp % of phantoms
%
\newdimen\c@rnwd % width of corner (first --- doubled, finally --- true)
\newdimen\c@frwd % doubled width of corner + width of frame
\newdimen\c@rnsh % corner shift
\newdimen\sh@dsh % shadow shift
%
% ------------------------------------------------------------------------
% QUARTER CIRCLES:
% ------------------------------------------------------------------------
%\font\circle=circle10 \font\circlew=circlew10
\font\circle=lcircle1 \font\circlew=lcirclew
% ------------------------------------------------------------------------
\newcount\cornern@
\def\@vailcorn{\immediate
\write16{! AVAILABLE CORNER SETS: -1,0,1,2,...,9 --- 4th set assumed}%
\cornern@=4}
\def\s@tc@rn@rs{%
\ifnum\cornern@<-1\@vailcorn\fi
\ifnum\cornern@>9\@vailcorn\fi
\ifnum\cornern@=-1
% degenerated corner set;
% in fact, only the width of \luq@tr is important, the corners are
% not drawn, simply the rules are longer.
\def\Ph@ntc@rn{\vbox to 0.8pt{\vss\hbox to 1.6pt{}}}%
\def\ph@ntc@rn{\vbox to 0.4pt{\vss\hbox to 0.8pt{}}}%
\def\luq@tr{\ifx\cf\circlew \Ph@ntc@rn \else \ph@ntc@rn \fi}%
\else
\multiply\cornern@4
\edef\ruq@tr{{\noexpand\cf\char\the\cornern@}}% right upper qtr
\advance\cornern@ 1
\edef\rlq@tr{{\noexpand\cf\char\the\cornern@}}% left upper qtr
\advance\cornern@ 1
\edef\llq@tr{{\noexpand\cf\char\the\cornern@}}% left lower qtr
\advance\cornern@ 1
\edef\luq@tr{{\noexpand\cf\char\the\cornern@}}% left upper qtr
\fi}
\def\setcorners{\afterassignment\s@tc@rn@rs \cornern@ = }
\setcorners 4 % G. Glendown preferred set no 2
% ------------------------------------------------------------------------
% ROUND BOXES:
% ------------------------------------------------------------------------
%
\def\RB@x#1#2{% #1 - rule thickness, #2 - text
% known:
% \t@mpwd \t@mpht
\t@mpth=#1\relax
\setbox\t@mpb@x=\hbox{\luq@tr}\c@rnwd=\wd\t@mpb@x
\ifdim\c@rnwd=\z@ \c@rnwd=2\t@mpth\fi
\c@frwd=\t@mpth % \c@frwd is globally copied to \sh@dsh in
% \s(S)hadowB@x
\advance \c@frwd \c@rnwd
\c@rnsh=-\t@mpth\advance \c@rnsh \c@rnwd
\setbox\t@mpb@x=\hbox{#2}%
\xt@mpht=\ht\t@mpb@x % pha
\xt@mpwd=\wd\t@mpb@x % nt
\xt@mpdp=\dp\t@mpb@x % om...
\setbox\t@mpb@x=\hbox \ifdim\t@mpwd<\c@frwd
spread \c@rnwd
\else
to \t@mpwd
\fi
{\hss\box\t@mpb@x\hss}%
\advance\t@mpht-\c@frwd \ifdim\t@mpht<\z@ \t@mpht=\z@\fi
\setbox\t@mpb@x=\hbox to \wd\t@mpb@x{\vrule width\t@mpth\hss
\vbox \ifdim\t@mpht>\z@ to \t@mpht\fi
{\vss\box\t@mpb@x\vss}%
\hss\vrule width\t@mpth}%
\c@rnwd=0.5\c@rnwd
\t@mpwd=\wd\t@mpb@x
\vbox spread -\c@rnsh{%
\offinterlineskip
\vss
\hbox to \t@mpwd{\ifnum\cornern@=-1 \else
\hbox to \c@rnwd{\luq@tr\hss}%
\fi
\leaders\hrule height\t@mpth\hfil
\ifnum\cornern@=-1 \else
\hbox to \c@rnwd{\hss\ruq@tr\kern-\c@rnsh}%
\fi}
\box\t@mpb@x
\hbox to \t@mpwd{\ifnum\cornern@=-1 \else
\hbox to \c@rnwd{\llq@tr\hss}%
\fi
\leaders\hrule height\t@mpth\hfil
\ifnum\cornern@=-1 \else
\hbox to \c@rnwd{\hss\rlq@tr\kern-\c@rnsh}%
\fi}
\vss
}%
}% end \def\RB@x
%
\def\roundbox#1#{\setbox\t@mpb@x=\hbox{\vrule #1}% Attention! trick!
\t@mpwd=\wd\t@mpb@x \t@mpht=\ht\t@mpb@x
\roundB@x}
\def\roundB@x#1{\font\cf=lcircle1 \RB@x{.4pt}{#1}}
%
\def\Roundbox#1#{\setbox\t@mpb@x=\hbox{\vrule #1}% Attention! trick!
\t@mpwd=\wd\t@mpb@x \t@mpht=\ht\t@mpb@x
\RoundB@x}
\def\RoundB@x#1{\font\cf=lcirclew \RB@x{.85pt}{#1}}
%
% ------------------------------------------------------------------------
% SHADOW BOXES:
% ------------------------------------------------------------------------
%
\def\RShB@x#1{% #1 - rule thickness
% known:
% \t@mpwd \t@mpht
% \xt@mpwd \xt@mpht \xt@mpdp
\t@mpth=#1\relax
\setbox\t@mpb@x=\hbox{\luq@tr}\c@rnwd=\wd\t@mpb@x
\ifdim\c@rnwd=\z@ \c@rnwd=2\t@mpth\fi
\c@frwd=\t@mpth % \c@frwd is globally copied to \sh@dsh in
% \s(S)hadowB@x
\advance \c@frwd \c@rnwd
\c@rnsh=-\t@mpth\advance \c@rnsh \c@rnwd
\setbox\t@mpb@x=\hbox \ifdim\t@mpwd<\c@frwd
spread \c@rnwd
\else
to \t@mpwd
\fi
{\hss\vrule width \z@ height\xt@mpht depth\xt@mpdp
\hskip\xt@mpwd\hss}%
\setbox\t@mpb@x=\vbox \ifdim\t@mpht>\z@ to \t@mpht\fi
{\vss\box\t@mpb@x\vss}%
\c@rnwd=0.5\c@rnwd
\t@mpwd=\wd\t@mpb@x
\setbox\t@mpb@x=\hbox to \t@mpwd{\vbox \ifnum\cornern@=-1 spread\c@rnwd \fi
{\vss\box\t@mpb@x}\hss\vrule width\t@mpth}%
\vbox spread -\c@rnsh{%
\offinterlineskip
\vss
\hbox to \t@mpwd{\hfil
\ifnum\cornern@=-1 \else
\hbox to \c@rnwd{\hss\ruq@tr\kern-\c@rnsh}%
\fi}
\box\t@mpb@x
\hbox to \t@mpwd{\ifnum\cornern@=-1 \else
\hbox to \c@rnwd{\llq@tr\hss}%
\fi
\leaders\hrule height\t@mpth\hfil
\ifnum\cornern@=-1 \else
\hbox to \c@rnwd{\hss\rlq@tr\kern-\c@rnsh}%
\fi}
\vss
}%
}% end \def\RShB@x
%
\def\shadowbox#1#{\def\p@r@m{#1}\shadowB@x}
\def\shadowB@x#1{\vbox{\hbox{\roundbox\p@r@m{#1}\global\sh@dsh\c@frwd
\kern-\t@mpwd \kern0.5\sh@dsh \lower0.5\sh@dsh
\hbox{\font\cf=lcircle1 \RShB@x{.4pt}}%
\kern-0.5\sh@dsh} \kern-0.5\sh@dsh}}
%
\def\Shadowbox#1#{\def\p@r@m{#1}\ShadowB@x}
\def\ShadowB@x#1{\vbox{\hbox{\Roundbox\p@r@m{#1}\global\sh@dsh\c@frwd
\kern-\t@mpwd \kern0.5\sh@dsh \lower0.5\sh@dsh
\hbox{\font\cf=lcirclew \RShB@x{.85pt}}%
\kern-0.5\sh@dsh} \kern-0.5\sh@dsh}}
%
% ------------------------------------------------------------------------
%
\catcode`\@=12
%
% ------------------------------------------------------------------------
\endinput
% ------------------------------------------------------------------------
% END OF ROUNDBOX.TEX
% ------------------------------------------------------------------------
|
