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%
% pie.tex
%
\renewcommand{\thisname}{Chart::Pie}
\section{\thisname}
\name{\thisname}
\file{Pie.pm}
\requires{Chart::Base, GD, Carp, FileHandle}
\begin{Description}
The class \thisclass creates a pie chart. The first added set must
contain the labels, the second set the values. \thisclass is a subclass
of \class{Chart::Base}.
\end{Description}
\example
\begin{figure}[ht]
\begin{center}
\includegraphics[scale = 0.6]{d_pie3.png}
\end{center}
\caption{Pie chart}
\label{fig:pie}
\end{figure}
\begin{verbatim}
use Chart::Pie;
$g = Chart::Pie->new();
$g->add_dataset('Har', 'Sug', 'Ert', 'Her', 'Tar', 'Kure');
$g->add_dataset(12000, 20000 , 13000, 15000, 9000, 11000 );
%opt = ('title' => 'Another Pie Demo Chart',
'label_values' => 'both',
'legend' => 'none',
'text_space' => 10,
'png_border' => 1,
'graph_border' => 0,
'colors' => { 'x_label' => 'red',
'misc' => 'plum',
'background' => 'grey',
'dataset0' => [120, 0, 255],
'dataset1' => [120, 100, 255],
'dataset2' => [120, 200, 255],
'dataset3' => [255, 100, 0],
'dataset4' => [255, 50, 0],
'dataset5' => [255, 0, 0],
},
'x_label' => 'The Winner is Team Blue!',
);
$g->set(%opt);
$g->png("pie.png");
\end{verbatim}
\constructorblurb{\thisname}
\begin{AttrDecl}{label\_values}
Tells \thisclass what kind of value labels to show alongside the pie.
Valid values are \literal{percent}, \literal{value}, \literal{both} and
\literal{none}. Defaults to \literal{percent}.
\end{AttrDecl}
\begin{AttrDecl}{legend\_label\_values}
Tells \thisclass what kind of labels to show in the legend. Valid values
are \literal{percent}, \literal{value}, \literal{both} and
\literal{none}. Defaults to \literal{value}.
\end{AttrDecl}
\begin{AttrDecl}{legend\_lines}
The labels drawn alongside the pie are connected with a line to the
segment if this option is set to \literal{true}.
\end{AttrDecl}
\begin{AttrDecl}{ring}
The pie can have a ring shape instead of the usual disc shape. This
option determines the thickness of the ring as a fraction of the radius.
Default is 1, \ie, a full pie.
\end{AttrDecl}
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