/**
* Generates an histogram
* @param array list of exercise names
* @param array my results 0 to 100
* @param array average scores 0-100
* @return string
*/
static function generate_session_exercise_graph($names, $my_results, $average)
{
/* Create and populate the pData object */
$myData = new pData();
$myData->addPoints($names, 'Labels');
$myData->addPoints($my_results, 'Serie1');
$myData->addPoints($average, 'Serie2');
$myData->setSerieWeight('Serie1', 1);
$myData->setSerieTicks('Serie2', 4);
$myData->setSerieDescription('Labels', 'Months');
$myData->setAbscissa('Labels');
$myData->setSerieDescription('Serie1', get_lang('MyResults'));
$myData->setSerieDescription('Serie2', get_lang('AverageScore'));
$myData->setAxisUnit(0, '%');
$myData->loadPalette(api_get_path(SYS_CODE_PATH) . 'palettes/pchart/default.color', true);
// Cache definition
$cachePath = api_get_path(SYS_ARCHIVE_PATH);
$myCache = new pCache(array('CacheFolder' => substr($cachePath, 0, strlen($cachePath) - 1)));
$chartHash = $myCache->getHash($myData);
if ($myCache->isInCache($chartHash)) {
//if we already created the img
$imgPath = api_get_path(SYS_ARCHIVE_PATH) . $chartHash;
$myCache->saveFromCache($chartHash, $imgPath);
$imgPath = api_get_path(WEB_ARCHIVE_PATH) . $chartHash;
} else {
/* Define width, height and angle */
$mainWidth = 860;
$mainHeight = 500;
$angle = 50;
/* Create the pChart object */
$myPicture = new pImage($mainWidth, $mainHeight, $myData);
/* Turn of Antialiasing */
$myPicture->Antialias = false;
/* Draw the background */
$settings = array('R' => 255, 'G' => 255, 'B' => 255);
$myPicture->drawFilledRectangle(0, 0, $mainWidth, $mainHeight, $settings);
/* Add a border to the picture */
$myPicture->drawRectangle(0, 0, $mainWidth - 1, $mainHeight - 1, array('R' => 0, 'G' => 0, 'B' => 0));
/* Set the default font */
$myPicture->setFontProperties(array('FontName' => api_get_path(SYS_FONTS_PATH) . 'opensans/OpenSans-Regular.ttf', 'FontSize' => 10));
/* Write the chart title */
$myPicture->drawText($mainWidth / 2, 30, get_lang('ExercisesInTimeProgressChart'), array('FontSize' => 12, 'Align' => TEXT_ALIGN_BOTTOMMIDDLE));
/* Set the default font */
$myPicture->setFontProperties(array('FontName' => api_get_path(SYS_FONTS_PATH) . 'opensans/OpenSans-Regular.ttf', 'FontSize' => 6));
/* Define the chart area */
$myPicture->setGraphArea(60, 60, $mainWidth - 60, $mainHeight - 150);
/* Draw the scale */
$scaleSettings = array('XMargin' => 10, 'YMargin' => 10, 'Floating' => true, 'GridR' => 200, 'GridG' => 200, 'GridB' => 200, 'DrawSubTicks' => true, 'CycleBackground' => true, 'LabelRotation' => $angle, 'Mode' => SCALE_MODE_ADDALL_START0);
$myPicture->drawScale($scaleSettings);
/* Turn on Antialiasing */
$myPicture->Antialias = true;
/* Enable shadow computing */
$myPicture->setShadow(true, array('X' => 1, 'Y' => 1, 'R' => 0, 'G' => 0, 'B' => 0, 'Alpha' => 10));
/* Draw the line chart */
$myPicture->setFontProperties(array('FontName' => api_get_path(SYS_FONTS_PATH) . 'opensans/OpenSans-Regular.ttf', 'FontSize' => 10));
$myPicture->drawSplineChart();
$myPicture->drawPlotChart(array('DisplayValues' => true, 'PlotBorder' => true, 'BorderSize' => 1, 'Surrounding' => -60, 'BorderAlpha' => 80));
/* Write the chart legend */
$myPicture->drawLegend($mainWidth / 2 + 50, 50, array('Style' => LEGEND_BOX, 'Mode' => LEGEND_HORIZONTAL, 'FontR' => 0, 'FontG' => 0, 'FontB' => 0, 'R' => 220, 'G' => 220, 'B' => 220, 'Alpha' => 100));
$myCache->writeToCache($chartHash, $myPicture);
$imgPath = api_get_path(SYS_ARCHIVE_PATH) . $chartHash;
$myCache->saveFromCache($chartHash, $imgPath);
$imgPath = api_get_path(WEB_ARCHIVE_PATH) . $chartHash;
}
$html = '<img src="' . $imgPath . '">';
return $html;
}
