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+% Copyright 2008 by Till Tantau and others Wibrow
+%
+% 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.
+
+
+
+%
+% Base shapes
+%
+% These shapes are identical to the shapes without "ee", only an "input"
+% and an "output" anchor have been added at the left and right end.
+
+\pgfdeclareshape{rectangle ee}
+{
+ \inheritsavedanchors[from=rectangle]
+ \inheritanchorborder[from=rectangle]
+ \inheritanchor[from=rectangle]{north}
+ \inheritanchor[from=rectangle]{north west}
+ \inheritanchor[from=rectangle]{north east}
+ \inheritanchor[from=rectangle]{center}
+ \inheritanchor[from=rectangle]{west}
+ \inheritanchor[from=rectangle]{east}
+ \inheritanchor[from=rectangle]{mid}
+ \inheritanchor[from=rectangle]{mid west}
+ \inheritanchor[from=rectangle]{mid east}
+ \inheritanchor[from=rectangle]{base}
+ \inheritanchor[from=rectangle]{base west}
+ \inheritanchor[from=rectangle]{base east}
+ \inheritanchor[from=rectangle]{south}
+ \inheritanchor[from=rectangle]{south west}
+ \inheritanchor[from=rectangle]{south east}
+ \inheritbackgroundpath[from=rectangle]
+ % New:
+ \anchor{input}{
+ \pgf@process{\northeast}%
+ \pgf@ya=.5\pgf@y%
+ \pgf@process{\southwest}%
+ \pgf@y=.5\pgf@y%
+ \advance\pgf@y by \pgf@ya%
+ }
+ \anchor{output}{%
+ \pgf@process{\southwest}%
+ \pgf@ya=.5\pgf@y%
+ \pgf@process{\northeast}%
+ \pgf@y=.5\pgf@y%
+ \advance\pgf@y by \pgf@ya%
+ }
+}
+
+\pgfdeclareshape{circle ee}
+{
+ \inheritsavedanchors[from=circle]
+ \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}
+ \inheritbackgroundpath[from=circle]
+ % New:
+ \anchor{input}{\centerpoint\advance\pgf@x by-\radius}
+ \anchor{output}{\centerpoint\advance\pgf@x by\radius}
+}
+
+
+
+%
+% Current direction indicator. This shape uses the current setting of
+% the current direction arrow tip for the arrow. The shape is a
+% rectangle around the arrow tip.
+%
+
+\pgfdeclareshape{direction ee}
+{
+ \savedanchor\northeast{
+ % Right border is given by right extend
+ \pgf@x=0pt%
+ \csname pgf@arrow@right@\pgfkeysvalueof{/pgf/direction ee arrow}\endcsname
+ % Height is given by minimum height/2
+ \pgfmathsetlength{\pgf@y}{\pgfkeysvalueof{/pgf/minimum height}}%
+ \pgf@y=.5\pgf@y
+ }
+ \savedanchor\southwest{
+ % Left border is given by left extend
+ \pgf@x=0pt%
+ \csname pgf@arrow@left@\pgfkeysvalueof{/pgf/direction ee arrow}\endcsname
+ \pgf@x=-\pgf@x%
+ % Height is given by minimum height/2
+ \pgfmathsetlength{\pgf@y}{\pgfkeysvalueof{/pgf/minimum height}}%
+ \pgf@y=-.5\pgf@y
+ }
+
+ \inheritanchor[from=rectangle ee]{center}
+ \inheritanchor[from=rectangle ee]{north}
+ \inheritanchor[from=rectangle ee]{south}
+ \inheritanchor[from=rectangle ee]{east}
+ \inheritanchor[from=rectangle ee]{west}
+ \inheritanchor[from=rectangle ee]{north east}
+ \inheritanchor[from=rectangle ee]{north west}
+ \inheritanchor[from=rectangle ee]{south east}
+ \inheritanchor[from=rectangle ee]{south west}
+ \inheritanchor[from=rectangle ee]{input}
+ \inheritanchor[from=rectangle ee]{output}
+ \inheritanchorborder[from=rectangle ee]
+ \nodeparts{}% no text
+
+ \behindbackgroundpath{
+ \pgf@process{\southwest}
+ \pgf@xa=\pgf@x
+ \pgf@process{\northeast}
+ \pgf@xb=\pgf@x
+ \pgfpathmoveto{\pgfqpoint{\pgf@xa}{0pt}}
+ \pgfpathlineto{\pgfqpoint{\pgf@xb}{0pt}}
+ \pgfusepathqstroke
+ }
+
+ \beforebackgroundpath{
+ {
+ \pgfsetarrowsend{\pgfkeysvalueof{/pgf/direction ee arrow}}
+ \pgfsys@beginscope
+ \pgflowlevelsynccm%
+ \pgflowlevelobj{}{\pgf@endarrow}%
+ \pgfsys@endscope
+ }
+ }
+}
+
+\pgfkeys{
+ /pgf/direction ee arrow/.initial=direction ee,
+}
+
+
+
+% Special arrow for ee directions:
+
+\pgfarrowsdeclare{direction ee}{direction ee}
+{
+ \pgfmathsetlength\pgfutil@tempdima{\pgfgetarrowoptions{direction ee}}%
+ \pgfutil@tempdima=.5\pgfutil@tempdima
+ \pgfarrowsleftextend{+-\pgfutil@tempdima}
+ \pgfarrowsrightextend{+\pgfutil@tempdima}
+}
+{
+ \pgfmathsetlength\pgfutil@tempdima{\pgfgetarrowoptions{direction ee}}%
+ \pgfsetdash{}{+0pt}
+ \pgfsetroundjoin
+ \pgfpathmoveto{\pgfqpoint{-0.5\pgfutil@tempdima}{0.38268343237\pgfutil@tempdima}}
+ \pgfpathlineto{\pgfqpoint{0.5\pgfutil@tempdima}{0\pgfutil@tempdima}}
+ \pgfpathlineto{\pgfqpoint{-0.5\pgfutil@tempdima}{-0.38268343237\pgfutil@tempdima}}
+ \pgfpathclose
+ \pgfusepathqfillstroke
+}
+
+\pgfsetarrowoptions{direction ee}{4pt}
+
+
+
+
+
+\endinput
+