/**
* @return string
*/
public function getGraph()
{
$data = $this->getDataForGraph();
if (!empty($data) && isset($data['categories']) && isset($data['my_result']) && isset($data['average'])) {
$dataSet = new pData();
$dataSet->addPoints($data['my_result'], get_lang('Me'));
// In order to generate random values
// $data['average'] = array(rand(0,50), rand(0,50));
$dataSet->addPoints($data['average'], get_lang('Average'));
$dataSet->addPoints($data['categories'], 'categories');
$dataSet->setAbscissa("categories");
$xSize = 600;
$ySize = 400;
$pChart = new pImage($xSize, $ySize, $dataSet);
/* Turn of Antialiasing */
$pChart->Antialias = FALSE;
/* Add a border to the picture */
$pChart->drawRectangle(0, 0, $xSize - 10, $ySize - 10, array("R" => 0, "G" => 0, "B" => 0));
$pChart->drawText(10, 16, get_lang('Results'), array("FontSize" => 11, "Align" => TEXT_ALIGN_BOTTOMLEFT));
$pChart->setGraphArea(50, 30, $xSize - 50, $ySize - 50);
$pChart->setFontProperties(array('FontName' => api_get_path(SYS_FONTS_PATH) . 'opensans/OpenSans-Regular.ttf', 'FontSize' => 10));
/* Draw the scale */
$scaleSettings = array("XMargin" => 10, "YMargin" => 10, "Floating" => true, "GridR" => 200, "GridG" => 200, "GridB" => 200, "DrawSubTicks" => true, "CycleBackground" => true);
$pChart->drawScale($scaleSettings);
/* Draw the line chart */
$pChart->drawLineChart();
$pChart->drawPlotChart(array("DisplayValues" => TRUE, "PlotBorder" => TRUE, "BorderSize" => 2, "Surrounding" => -60, "BorderAlpha" => 80));
/* Write the chart legend */
$pChart->drawLegend($xSize - 180, 9, array("Style" => LEGEND_NOBORDER, "Mode" => LEGEND_HORIZONTAL, "FontR" => 0, "FontG" => 0, "FontB" => 0));
$cachePath = api_get_path(SYS_ARCHIVE_PATH);
$myCache = new pCache(array('CacheFolder' => substr($cachePath, 0, strlen($cachePath) - 1)));
$chartHash = $myCache->getHash($dataSet);
$myCache->writeToCache($chartHash, $pChart);
$imgSysPath = api_get_path(SYS_ARCHIVE_PATH) . $chartHash;
$myCache->saveFromCache($chartHash, $imgSysPath);
$imgWebPath = api_get_path(WEB_ARCHIVE_PATH) . $chartHash;
if (file_exists($imgSysPath)) {
$result = '<div id="contentArea" style="text-align: center;" >';
$result .= '<img src="' . $imgWebPath . '" >';
$result .= '</div>';
return $result;
}
}
return '';
}
