86 lines
1.9 KiB
TeX
86 lines
1.9 KiB
TeX
% pie chart generator
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\newcounter{pieSlicePercentage}
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\newcounter{pieCounterCurrent}
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\newcounter{pieCounterNext}
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\newcounter{pieCounterTotal}
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\newcommand{\pieslice}[3]{
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\pgfmathparse{0.5*#1+0.5*#2}
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\let\midangle\pgfmathresult
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\setcounter{pieSlicePercentage}{\p*100/\thepieCounterTotal}
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% slice
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\draw[thick,fill=#3!\thepieSlicePercentage] (0,0) -- (#1:1) arc (#1:#2:1) -- cycle;
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}
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\newcommand{\pieslicelabel}[3]{
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\pgfmathparse{0.5*#1+0.5*#2}
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\let\midangle\pgfmathresult
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\setcounter{pieSlicePercentage}{\p*100/\thepieCounterTotal}
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% Outer label.
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\pgfmathparse{min((#2-#1-10)/110*(-0.3),0)}
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\let\temp\pgfmathresult
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\pgfmathparse{max(\temp,-0.5) + 1.55}
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\let\outerpos\pgfmathresult
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\node at (\midangle:\outerpos) {\textbf{#3}};
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% Inner label.
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\pgfmathparse{min((#2-#1-10)/110*(-0.3),0)}
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\let\temp\pgfmathresult
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\pgfmathparse{max(\temp,-0.5) + 0.8}
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\let\innerpos\pgfmathresult
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\node at (\midangle:\innerpos) {\thepieSlicePercentage \%};
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}
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\newcommand{\piechart}[3]{
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\setcounter{pieCounterCurrent}{0}
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\setcounter{pieCounterNext}{0}
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\setcounter{pieCounterTotal}{0}
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\begin{center}
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\begin{tikzpicture}[scale=#2]
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%% Get the total to turn the values into percentages.
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\foreach \p/\t in {#3} {
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\setcounter{pieCounterTotal}{\thepieCounterTotal+\p}
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}
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%% Draw the slices.
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\foreach \p/\t in {#3} {
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\setcounter{pieCounterCurrent}{\value{pieCounterNext}}
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\addtocounter{pieCounterNext}{\p}
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\pieslice{
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\thepieCounterCurrent/\thepieCounterTotal*360
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}{
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\thepieCounterNext/\thepieCounterTotal*360
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}{
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#1
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}
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}
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\setcounter{pieCounterCurrent}{0}
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\setcounter{pieCounterNext}{0}
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%% Write the labels.
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\foreach \p/\t in {#3}{
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\setcounter{pieCounterCurrent}{\value{pieCounterNext}}
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\addtocounter{pieCounterNext}{\p}
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\pieslicelabel{
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\thepieCounterCurrent/\thepieCounterTotal*360
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}{
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\thepieCounterNext/\thepieCounterTotal*360
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}{
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\t
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}
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}
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\end{tikzpicture}
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\end{center}
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}
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