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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% Start of pgf-pie.sty
%
% Some LaTeX macros for pie chart by using PGF/Tikz package.
% Home page of project: http://pgf-pie.googlecode.com/
% Author: Xu Yuan <xuyuan.cn@gmail.com>
%
\NeedsTeXFormat{LaTeX2e}[1999/12/01]
\ProvidesPackage{pgf-pie}[2011/10/01 v0.1 Some LaTeX macros for pie
chart by using PGF/Tikz package.]
\RequirePackage{tikz}
\usetikzlibrary{shadows}
\newcommand{\pgfpie@slice}[6]{
\pgfmathparse{0.5*#1+0.5*#2}
\let\midangle\pgfmathresult
\pgfmathparse{1}
\let\radius\pgfmathresult
% slice
\draw[thick,fill=#6, drop shadow] (\midangle:#5) -- ++(#1:\radius) arc (#1:#2:\radius) -- cycle;
% outer label
\node[label=\midangle:#4] at (\midangle:1) {};
% inner label
\pgfmathparse{min((#2-#1-10)/110*(-0.3),0)}
\let\temp\pgfmathresult
\pgfmathparse{max(\temp,-0.5) + 0.8}
\let\innerpos\pgfmathresult
\node at (\midangle:\innerpos) {#3};
}
\newcounter{a}
\newcounter{b}
\newcounter{explodelength}
\newcounter{colormaplength}
\def\setexplode#1\pgfeov{\def\explode{#1}}
\pgfkeyslet{/explode/.@cmd}{\setexplode}
\def\setcolormap#1\pgfeov{\def\colormap{#1}}
\pgfkeyslet{/colormap/.@cmd}{\setcolormap}
\newcommand{\pie}[2][]
{
\pgfkeys{explode=0,
colormap={blue!60, cyan!60, yellow!60, orange!60, red!60}}
\pgfkeys{#1}
\def\explodearray{{\explode}}
\setcounter{explodelength}{0}
\foreach \e in \explode { \addtocounter{explodelength}{1} }
\setcounter{colormaplength}{0}
\foreach \c in \colormap {
\addtocounter{colormaplength}{1}
}
\setcounter{b}{0}
\begin{tikzpicture}[scale=3,
% x={(1cm,0cm)}, y={(0cm,0.5cm)}
]
\foreach \p/\t [count=\i from 0] in {#2}
{
\setcounter{a}{\value{b}}
\addtocounter{b}{\p}
% find explode
\pgfmathparse{\explodearray[int(mod(\i,\value{explodelength}))]}
\let\e\pgfmathresult
% find color
\pgfmathparse{int(mod(\i,\value{colormaplength}))}
\let\ci\pgfmathresult
\foreach \c [count=\j from 0] in \colormap {
\ifnum \j=\ci
\xdef\thecolor{\c}
\breakforeach
\fi
}
\pgfpie@slice{\thea/100*360}
{\theb/100*360}
{\p\%}{\t}
{\e}
{\thecolor}
}
\end{tikzpicture}
}
%%% End of pgf-pie.sty
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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