/**
  * Create a JpGraph accumulated barPlot chart 
  *
  * @param Array $bplot Array of JpGraph barPlot objects
  * @param Chart $graph The output graph that will contains accumulated barPlots
  *
  * @return Void
  */
 private function displayAccumulatedGraph($bplot, $graph)
 {
     $abplot = new AccBarPlot($bplot);
     $abplot->SetAbsWidth(10);
     $graph->Add($abplot);
     $graph->Stroke();
 }
 /**
  *
  * @param Integer $groupId
  * @param String  $groupBy
  * @param Date    $startDate
  * @param Date    $endDate
  * @param Boolean $absolute Is y-axis relative to data set or absolute (starting from 0)
  */
 function displayProjectTotalSizeGraph($groupId, $groupBy, $startDate, $endDate, $absolute = true)
 {
     $graph = new Chart(420, 340, "auto");
     $graph->img->SetMargin(70, 50, 30, 70);
     $graph->SetScale("textlin");
     $graph->title->Set("Total project size growth over the time");
     $graph->yaxis->title->Set("Size");
     $graph->yaxis->SetTitleMargin(60);
     $graph->yaxis->setLabelFormatCallback(array($this, 'sizeReadable'));
     if ($absolute) {
         $graph->yaxis->scale->SetAutoMin(0);
     }
     $data = $this->_dum->getWeeklyEvolutionProjectTotalSize($groupId, $groupBy, $startDate, $endDate);
     if (is_array($data) && count($data) > 1) {
         $dates = array();
         $ydata = array();
         foreach ($data as $xdate => $values) {
             $dates[] = $xdate;
             $ydata[] = (double) $values;
         }
         $lineplot = new LinePlot($ydata);
         $color = '#6BA132';
         $lineplot->SetColor($color);
         $lineplot->SetFillColor($color . ':1.5');
         $lineplot->value->SetFont($graph->getFont(), FS_NORMAL, 8);
         $lineplot->value->setFormatCallback(array($this, 'sizeReadable'));
         $graph->Add($lineplot);
         $graph->xaxis->title->Set("Weeks");
         $graph->xaxis->SetTitleMargin(35);
         $graph->xaxis->SetTickLabels($dates);
         $graph->Stroke();
     } else {
         $this->displayError($GLOBALS['Language']->getText('plugin_statistics', 'no_data_error'));
     }
 }