class.ilChartDataSpider.php

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<?php
/* Copyright (c) 1998-2010 ILIAS open source, Extended GPL, see docs/LICENSE */

include_once "Services/Chart/classes/class.ilChartData.php";

class ilChartDataSpider extends ilChartData
{
    protected function getTypeString()
    {
        return "spider";
    }
    
    public function parseData(array &$a_data)
    {
        parent::parseData($a_data);
        
        $fill = $this->getFill();
        if ($fill["color"] != "") {
            $a_data[count($a_data) - 1]->color = ilChart::renderColor($fill["color"], "0.5");
        }
    }
    
    public function parseGlobalOptions(stdClass $a_options, ilChart $a_chart)
    {
        $spider = new stdClass();
        $spider->active = true;
        
        $spider->highlight = new stdClass();
        $spider->highlight->mode = "line";
        
        
        $spider->legs = new stdClass();
        $spider->legs->fillStyle = ilChart::renderColor("#000", "0.7");
        switch (count($a_chart->getLegLabels())) {
            case 4:
            case 6:
                $spider->legs->legStartAngle = 10;
                break;

            default:
                $spider->legs->legStartAngle = 0;
                break;
        }
        
        $spider->legs->data = array();
                
        $max_str_len = 0;
        foreach ($a_chart->getLegLabels() as $l) {
            $l = ilUtil::shortenText($l, 80, true);
            
            $label = new stdClass();
            $label->label = $l;
            $spider->legs->data[] = $label;

            $max_str_len = max($max_str_len, strlen($l));
        }
        
        // depending on caption length
        if ($max_str_len > 60) {
            $font_size = 10;
        } elseif ($max_str_len > 30) {
            $font_size = 12;
        } else {
            $font_size = 15;
        }
        $spider->legs->font = $font_size . "px Arial";
        
        $spider->spiderSize = 0.7;
        $spider->lineWidth = 1;
        $spider->pointSize = 0;
        
        $spider->connection = new StdClass();
        $spider->connection->width = 2;
        
        $spider->legMin = 0.0000001;
        $spider->legMax = $a_chart->getYAxisMax();
        
        $a_options->series->spider = $spider;
    }
}