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% Copyright 2008 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/datavisualization/pgflibrarydatavisualization.barcharts.code.tex,v 1.3 2008/11/12 23:39:37 tantau Exp $
\usepgfmodule{datavisualization}
%
% This file defines additional data visualization classes.
%
\pgfooclass{candle stick visualizer}
{
\attribute attribute;
\attribute offset;
\attribute use path rise=\pgfsetfillcolor{white}\pgfusepath{fill,stroke};
\attribute use path fall=\pgfsetfillcolor{black}\pgfusepath{fill,stroke};
\attribute use path wick=\pgfusepath{stroke};
\method candle stick visualizer(#1) {
\pgfooeset{attribute}{#1}
\pgfoothis.set stick width(4pt)
}
\method default connects() {
\pgfoothis.get handle(\pgf@dv@me)
\pgfkeysvalueof{/pgf/data visualization/obj}.connect(\pgf@dv@me,visualize,visualize datapoint signal)
}
\method set stick width(#1) {
\pgfmathparse{#1}
\pgfmathdivide{\pgfmathresult}{2}
\let\pgf@dv@lib@w=\pgfmathresult
% Compute the normalized vector:
\pgfkeyssetvalue{/data point/\pgfoovalueof{attribute}}{1}
\pgfcanvaspositionofdatapoint%
\pgfsettocanvasposition\pgf@dv@lib@lower%
\pgfkeyssetvalue{/data point/\pgfoovalueof{attribute}}{10}
\pgfcanvaspositionofdatapoint%
\pgfsettocanvasposition\pgf@dv@lib@upper%
\pgf@process{\pgfpointnormalised{\pgfpointdiff{\pgf@dv@lib@upper}{\pgf@dv@lib@lower}}}%
% Rotate by 90 degrees
\pgf@xa=\pgf@x%
\pgf@x=-\pgf@dv@lib@w\pgf@y%
\pgf@y=\pgf@dv@lib@w\pgf@xa%
\edef\pgf@dv@lib@temp{\noexpand\pgfqpoint{\the\pgf@x}{\the\pgf@y}}%
\pgfoolet{offset}\pgf@dv@lib@temp
}
\method set use path rise(#1) {
\pgfooset{use path rise}{#1}
}
\method set use path fall(#1) {
\pgfooset{use path fall}{#1}
}
\method visualize() {
{
\pgfooget{attribute}\pgf@lib@attribute%
\pgfkeysgetvalue{/data point/\pgf@lib@attribute/low}\pgf@lib@low
\pgfkeysgetvalue{/data point/\pgf@lib@attribute/high}\pgf@lib@high
\pgfkeysgetvalue{/data point/\pgf@lib@attribute/entry}\pgf@lib@entry
\pgfkeysgetvalue{/data point/\pgf@lib@attribute/exit}\pgf@lib@exit
\ifx\pgf@lib@low\pgfutil@empty\pgf@dv@lib@cs@skiptrue\fi
\ifx\pgf@lib@low\relax\pgf@dv@lib@cs@skiptrue\fi
\ifx\pgf@lib@high\pgfutil@empty\pgf@dv@lib@cs@skiptrue\fi
\ifx\pgf@lib@high\relax\pgf@dv@lib@cs@skiptrue\fi
\ifx\pgf@lib@entry\pgfutil@empty\pgf@dv@lib@cs@skiptrue\fi
\ifx\pgf@lib@entry\relax\pgf@dv@lib@cs@skiptrue\fi
\ifx\pgf@lib@exit\pgfutil@empty\pgf@dv@lib@cs@skiptrue\fi
\ifx\pgf@lib@exit\relax\pgf@dv@lib@cs@skiptrue\fi
\ifpgf@dv@lib@cs@skip%
\else%
\begin{pgfscope}
% Ok, compute low point
\pgfkeyssetvalue{/data point/\pgf@lib@attribute}\pgf@lib@low
\pgfcanvaspositionofdatapoint%
\pgfsettocanvasposition\pgf@dv@lib@lowpoint%
% Ok, compute hight point
\pgfkeyssetvalue{/data point/\pgf@lib@attribute}\pgf@lib@high
\pgfcanvaspositionofdatapoint%
\pgfsettocanvasposition\pgf@dv@lib@highpoint%
% Compute entry and exit
\pgfkeyssetvalue{/data point/\pgf@lib@attribute}\pgf@lib@entry
\pgfcanvaspositionofdatapoint%
\pgfsettocanvasposition\pgf@dv@lib@entrypoint%
\pgfkeyssetvalue{/data point/\pgf@lib@attribute}\pgf@lib@exit
\pgfcanvaspositionofdatapoint%
\pgfsettocanvasposition\pgf@dv@lib@exitpoint%
\ifdim\pgf@lib@entry pt<\pgf@lib@exit pt\relax%
\pgf@dv@lib@risetrue%
\fi%
\ifpgf@dv@lib@rise
\let\pgf@dv@lib@a=\pgf@dv@lib@entrypoint
\let\pgf@dv@lib@b=\pgf@dv@lib@exitpoint
\else
\let\pgf@dv@lib@a=\pgf@dv@lib@exitpoint
\let\pgf@dv@lib@b=\pgf@dv@lib@entrypoint
\fi
% Start drawing...
\pgfpathmoveto{\pgf@dv@lib@lowpoint}
\pgfpathlineto{\pgf@dv@lib@a}
\pgfpathmoveto{\pgf@dv@lib@highpoint}
\pgfpathlineto{\pgf@dv@lib@b}
\pgfoovalueof{use path wick}
\pgfpathmoveto{\pgfpointadd{\pgf@dv@lib@a}{\pgfoovalueof{offset}}}
\pgfpathlineto{\pgfpointadd{\pgf@dv@lib@b}{\pgfoovalueof{offset}}}
\pgfpathlineto{\pgfpointadd{\pgf@dv@lib@b}{\pgfpointscale{-1}{\pgfoovalueof{offset}}}}
\pgfpathlineto{\pgfpointadd{\pgf@dv@lib@a}{\pgfpointscale{-1}{\pgfoovalueof{offset}}}}
\pgfpathclose
\ifpgf@dv@lib@rise
\pgfoovalueof{use path rise}
\else
\pgfoovalueof{use path fall}
\fi
\end{pgfscope}
\fi
}
}
\newif\ifpgf@dv@lib@cs@skip
\newif\ifpgf@dv@lib@rise
}
\endinput
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