class.ilChartPie.php

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<?php

class ilChartPie extends ilChart
{
    public function getDataInstance(int $a_type = null): ilChartData
    {
        return new ilChartDataPie();
    }

    protected function isValidDataType(ilChartData $a_series): bool
    {
        return ($a_series instanceof ilChartDataPie);
    }

    protected function addCustomJS(): void
    {
        $tpl = $this->tpl;

        $tpl->addJavaScript("assets/js/jquery.flot.pie.js");
    }

    public function parseGlobalOptions(stdClass $a_options): void
    {
        // if no inner labels set, use legend
        if (!isset($a_options->series->pie->label) &&
            !$this->legend) {
            $legend = new ilChartLegend();
            $legend->setPosition("nw");
            $this->setLegend($legend);
        }
    }
}