public function render($output = true)
{
$pie = new PieChartRenderer();
$pie->disableLegend();
$pie->drawPie(array('data' => $this->data, 'colors' => $this->colors, 'labels' => $this->labels));
$pie->setWidth($this->width)->setHeight($this->height);
if ($output) {
echo $pie->render();
} else {
return $pie->render();
}
}
