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+% Copyright 2006 by Till Tantau
+%
+% This file may be distributed and/or modified
+%
+% 1. under the LaTeX Project Public License and/or
+% 2. under the GNU Public License.
+%
+% See the file doc/generic/pgf/licenses/LICENSE for more details.
+
+\ProvidesFileRCS[v\pgfversion] $Header: /cvsroot/pgf/pgf/generic/pgf/libraries/pgflibraryshapes.multipart.code.tex,v 1.1 2007/06/08 11:24:59 tantau Exp $
+
+\newbox\pgfnodepartlowerbox
+
+%
+% A circle that is split in the middle into an upper and a lower part.
+%
+% This node consists of two parts: The upper (main) part is shown in
+% the upper half of the circle. The second part is the (optional)
+% lower part.
+%
+% Parts: text, lower
+
+\pgfdeclareshape{circle split}
+{
+ %
+ % Node parts
+ %
+ \nodeparts{text,lower}
+
+ %
+ % Anchors
+ %
+ \savedanchor\centerpoint{%
+ \pgf@x=.5\wd\pgfnodeparttextbox%
+ \pgfmathsetlength{\pgf@y}{\pgfshapeinnerysep}%
+ \pgf@y=-\pgf@y%
+ \advance\pgf@y by-\dp\pgfnodeparttextbox%
+ \advance\pgf@y by-.5\pgflinewidth%
+ }%
+ \savedanchor\loweranchor{%
+ \pgf@x=-.5\wd\pgfnodepartlowerbox%
+ \advance\pgf@x by.5\wd\pgfnodeparttextbox%
+ \pgfmathsetlength{\pgf@y}{\pgfshapeinnerysep}%
+ \pgf@y=-2\pgf@y%
+ \advance\pgf@y by-\ht\pgfnodepartlowerbox%
+ \advance\pgf@y by-.5\pgflinewidth%
+ \advance\pgf@y by-\dp\pgfnodeparttextbox%
+ \advance\pgf@y by-.5\pgflinewidth%
+ }
+
+ \saveddimen\radius{%
+ %
+ % Caculate ``height radius''
+ %
+ \pgf@ya=.5\ht\pgfnodeparttextbox%
+ \advance\pgf@ya by.5\dp\pgfnodeparttextbox%
+ \advance\pgf@ya by.5\ht\pgfnodepartlowerbox%
+ \advance\pgf@ya by.5\dp\pgfnodepartlowerbox%
+ \advance\pgf@ya by.5\pgflinewidth%
+ \pgfmathsetlength\pgf@yb{\pgfshapeinnerysep}%
+ \advance\pgf@ya by2\pgf@yb%
+ %
+ % Caculate ``width radius''
+ %
+ \pgf@xa=.5\wd\pgfnodeparttextbox%
+ \ifdim\pgf@xa<.5\wd\pgfnodepartlowerbox%
+ \pgf@xa=.5\wd\pgfnodepartlowerbox%
+ \fi%
+ \pgfmathsetlength\pgf@xb{\pgfshapeinnerxsep}%
+ \advance\pgf@xa by\pgf@xb%
+ %
+ % Calculate length of radius vector:
+ %
+ \pgf@process{\pgfpointnormalised{\pgfqpoint{\pgf@xa}{\pgf@ya}}}%
+ \ifdim\pgf@x>\pgf@y%
+ \c@pgf@counta=\pgf@x%
+ \ifnum\c@pgf@counta=0\relax%
+ \else%
+ \divide\c@pgf@counta by 255\relax%
+ \pgf@xa=16\pgf@xa\relax%
+ \divide\pgf@xa by\c@pgf@counta%
+ \pgf@xa=16\pgf@xa\relax%
+ \fi%
+ \else%
+ \c@pgf@counta=\pgf@y%
+ \ifnum\c@pgf@counta=0\relax%
+ \else%
+ \divide\c@pgf@counta by 255\relax%
+ \pgf@ya=16\pgf@ya\relax%
+ \divide\pgf@ya by\c@pgf@counta%
+ \pgf@xa=16\pgf@ya\relax%
+ \fi%
+ \fi%
+ \pgf@x=\pgf@xa%
+ %
+ % If necessary, adjust radius so that the size requirements are
+ % met:
+ %
+ \pgfmathsetlength{\pgf@xb}{\pgfshapeminwidth}%
+ \pgfmathsetlength{\pgf@yb}{\pgfshapeminheight}%
+ \ifdim\pgf@x<.5\pgf@xb%
+ \pgf@x=.5\pgf@xb%
+ \fi%
+ \ifdim\pgf@x<.5\pgf@yb%
+ \pgf@x=.5\pgf@yb%
+ \fi%
+ %
+ % Now, add larger of outer sepearations.
+ %
+ \pgfmathsetlength{\pgf@xb}{\pgfshapeouterxsep}%
+ \pgfmathsetlength{\pgf@yb}{\pgfshapeouterysep}%
+ \ifdim\pgf@xb<\pgf@yb%
+ \advance\pgf@x by\pgf@yb%
+ \else%
+ \advance\pgf@x by\pgf@xb%
+ \fi%
+ }
+
+ %
+ % Anchors
+ %
+ \inheritanchorborder[from=circle]
+ \inheritanchor[from=circle]{north}
+ \inheritanchor[from=circle]{north west}
+ \inheritanchor[from=circle]{north east}
+ \inheritanchor[from=circle]{center}
+ \inheritanchor[from=circle]{west}
+ \inheritanchor[from=circle]{east}
+ \inheritanchor[from=circle]{mid}
+ \inheritanchor[from=circle]{mid west}
+ \inheritanchor[from=circle]{mid east}
+ \inheritanchor[from=circle]{base}
+ \inheritanchor[from=circle]{base west}
+ \inheritanchor[from=circle]{base east}
+ \inheritanchor[from=circle]{south}
+ \inheritanchor[from=circle]{south west}
+ \inheritanchor[from=circle]{south east}
+ \anchor{lower}{\loweranchor}
+
+ %
+ % Background path
+ %
+ \inheritbackgroundpath[from=circle]
+ \beforebackgroundpath{
+ \pgfutil@tempdima=\radius%
+ \pgfmathsetlength{\pgf@xb}{\pgfshapeouterxsep}%
+ \pgfmathsetlength{\pgf@yb}{\pgfshapeouterysep}%
+ \ifdim\pgf@xb<\pgf@yb%
+ \advance\pgfutil@tempdima by-\pgf@yb%
+ \else%
+ \advance\pgfutil@tempdima by-\pgf@xb%
+ \fi%
+ \advance\pgfutil@tempdima by-.5\pgflinewidth%
+ \pgfsetshortenstart{0pt}%
+ \pgfsetshortenend{0pt}%
+ \pgfsetarrows{-}%
+ \pgfpathmoveto{\pgfpointadd{\centerpoint}{\pgfqpoint{-1\pgfutil@tempdima}{0pt}}}%
+ \pgfpathlineto{\pgfpointadd{\centerpoint}{\pgfqpoint{\pgfutil@tempdima}{0pt}}}%
+ \pgfusepath{stroke}%
+ }
+}
+
+
+
+\endinput