/**
  * Collects and renders user per group report data
  */
 public function user_per_group()
 {
     $myConfig = $this->getConfig();
     $oDb = oxDb::getDb();
     global $aTitles;
     $aDataX = array();
     $aDataY = array();
     $sSQL = "SELECT oxgroups.oxtitle,\n                        count(oxuser.oxid)\n                 FROM oxobject2group,\n                      oxuser,\n                      oxgroups\n                 WHERE oxobject2group.oxobjectid = oxuser.oxid  AND\n                       oxobject2group.oxgroupsid = oxgroups.oxid\n                 GROUP BY oxobject2group.oxgroupsid\n                 ORDER BY oxobject2group.oxgroupsid";
     $rs = $oDb->execute($sSQL);
     if ($rs != false && $rs->recordCount() > 0) {
         while (!$rs->EOF) {
             if ($rs->fields[1]) {
                 $aDataX[] = $rs->fields[1];
                 $aDataY[] = $rs->fields[0];
             }
             $rs->moveNext();
         }
     }
     header("Content-type: image/png");
     // New graph with a drop shadow
     if (count($aDataX) > 10) {
         $graph = new PieGraph(800, 830);
     } else {
         $graph = new PieGraph(600, 600);
     }
     $graph->setBackgroundImage($myConfig->getImageDir(true) . "/reportbgrnd.jpg", BGIMG_FILLFRAME);
     $graph->setShadow();
     // Set title and subtitle
     //$graph->title->set($this->aTitles[$myConfig->getConfigParam( 'iAdminLanguage' ) ]);
     $graph->title->set($this->aTitles[oxRegistry::getLang()->getObjectTplLanguage()]);
     // Use built in font
     $graph->title->setFont(FF_FONT1, FS_BOLD);
     // Create the bar plot
     $bplot = new PiePlot3D($aDataX);
     $bplot->setSize(0.4);
     $bplot->setCenter(0.5, 0.32);
     // explodes all chunks of Pie from center point
     $bplot->explodeAll(10);
     $iUserCount = 0;
     foreach ($aDataX as $iVal) {
         $iUserCount += $iVal;
     }
     for ($iCtr = 0; $iCtr < count($aDataX); $iCtr++) {
         $iSLeng = strlen($aDataY[$iCtr]);
         if ($iSLeng > 20) {
             if ($iSLeng > 23) {
                 $aDataY[$iCtr] = trim(substr($aDataY[$iCtr], 0, 20)) . "...";
             }
         }
         $aDataY[$iCtr] .= " - " . $aDataX[$iCtr] . " Kund.";
     }
     $bplot->setLegends($aDataY);
     if (count($aDataX) > 10) {
         $graph->legend->pos(0.49, 0.66, 'center');
         $graph->legend->setFont(FF_FONT0, FS_NORMAL);
         $graph->legend->setColumns(4);
     } else {
         $graph->legend->pos(0.49, 0.7, 'center');
         $graph->legend->setFont(FF_FONT1, FS_NORMAL);
         $graph->legend->setColumns(2);
     }
     $graph->add($bplot);
     // Finally output the  image
     $graph->stroke();
 }