class.ilChart.php

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

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

abstract class ilChart
{
        protected $id; // [string]
        protected $width; // [string]
        protected $height; // [string]
        protected $data; // [array]
        protected $legend; // [ilChartLegend]
        protected $shadow; // [int]
        protected $colors; // [array]
        protected $auto_resize; // [bool]

        const TYPE_GRID = 1;
        const TYPE_PIE = 2;
        const TYPE_SPIDER = 3;

        protected function __construct($a_id)
        {
                $this->id = $a_id;
                $this->data = array();
                                
                $this->setShadow(2);
        }

        public static function getInstanceByType($a_type, $a_id)
        {               
                switch($a_type)
                {
                        case self::TYPE_GRID:
                                include_once "Services/Chart/classes/class.ilChartGrid.php";
                                return new ilChartGrid($a_id);
                                
                        case self::TYPE_PIE:
                                include_once "Services/Chart/classes/class.ilChartPie.php";
                                return new ilChartPie($a_id);
                                
                        case self::TYPE_SPIDER:
                                include_once "Services/Chart/classes/class.ilChartSpider.php";
                                return new ilChartSpider($a_id);
                }                               
        }
        
        abstract public function getDataInstance($a_type = null);
        
        abstract protected function isValidDataType(ilChartData $a_series);
        
        protected function isValid()
        {
                if(sizeof($this->data))
                {
                        return true;
                }
                return false;
        }

        public function setSize($a_x, $a_y)
        {
                $this->width = $a_x;
                $this->height = $a_y;
        }

        public function addData(ilChartData $a_series, $a_idx = null)
        {
                if($this->isValidDataType($a_series))
                {
                        if($a_idx === null)
                        {
                                $a_idx = sizeof($this->data);
                        }
                        $this->data[$a_idx] = $a_series;
                        return $a_idx;
                }
        }

        public function setLegend(ilChartLegend $a_legend)
        {
                $this->legend = $a_legend;
        }
        
        public function setColors($a_values)
        {
                foreach($a_values as $color)
                {
                        if(self::isValidColor($color))
                        {
                                $this->colors[] = $color;
                        }
                }
        }

        public function getColors()
        {
                return $this->colors;
        }

        public static function isValidColor($a_value)
        {
            if(preg_match("/^#[0-9a-f]{3}$/i", $a_value, $match))
                {
                        return true;
                }
                else if(preg_match("/^#[0-9a-f]{6}$/i", $a_value, $match))
                {
                        return true;
                }               
        }

        public static function renderColor($a_value, $a_opacity = 1)
        {
                if(self::isValidColor($a_value))
                {
                        if(strlen($a_value) == 4)
                        {
                                return "rgba(".hexdec($a_value[1].$a_value[1]).", ".
                                        hexdec($a_value[2].$a_value[2]).", ".
                                        hexdec($a_value[3].$a_value[3]).", ".$a_opacity.")";
                        }
                        else
                        {
                                return "rgba(".hexdec($a_value[1].$a_value[2]).", ".
                                        hexdec($a_value[3].$a_value[4]).", ".
                                        hexdec($a_value[5].$a_value[6]).", ".$a_opacity.")";
                        }
                }
        }

        public function setShadow($a_value)
        {
                $this->shadow = (int)$a_value;
        }

        public function getShadow()
        {
                return $this->shadow;
        }
        
        public function setAutoResize($a_value)
        {
                $this->auto_resize = (bool)$a_value;
        }
        
        protected function initJS()
        {
                global $tpl;
                
                include_once "Services/jQuery/classes/class.iljQueryUtil.php";
                iljQueryUtil::initjQuery();
                
                $tpl->addJavascript("Services/Chart/js/flot/excanvas.min.js");
                $tpl->addJavascript("Services/Chart/js/flot/jquery.flot.min.js");
                
                if((bool)$this->auto_resize)
                {
                        // #13108
                        $tpl->addJavascript("Services/Chart/js/flot/jquery.flot.resize.min.js");
                }
                
                $this->addCustomJS();
        }
        
        protected function addCustomJS()
        {
                
        }
        
        public function parseGlobalOptions(stdClass $a_options)
        {
                                
        }
        
        public function getHTML()
        {               
                if(!$this->isValid())
                {
                        return;
                }
                
                $this->initJS();                        
        
                $chart = new ilTemplate("tpl.grid.html", true, true, "Services/Chart");
                $chart->setVariable("ID", $this->id);
                
                if($this->width)
                {
                        if(is_numeric($this->width))
                        {
                                $chart->setVariable("WIDTH", "width:".$this->width."px;");
                        }
                        else
                        {
                                $chart->setVariable("WIDTH", "width:".$this->width.";");
                        }
                }
                if($this->height)
                {
                        if(is_numeric($this->height))
                        {
                                $chart->setVariable("HEIGHT", "height:".$this->height."px;");
                        }
                        else
                        {
                                $chart->setVariable("HEIGHT", "height:".$this->height.";");
                        }
                }
                
                
                // (series) data
                
                $json_series = array();         
                foreach($this->data as $series)
                {
                        $series->parseData($json_series);                                       
                }
                $chart->setVariable("SERIES", json_encode($json_series));
                
                
                // global options
                
                $json_options = new stdClass();         
                $json_options->series = new stdClass();
                $json_options->series->shadowSize = (int)$this->getShadow();
                $json_options->series->lines = new stdClass();
                $json_options->series->lines->show = false;
                
                foreach($this->data as $series)
                {
                        $series->parseGlobalOptions($json_options, $this);              
                }               
                
                $this->parseGlobalOptions($json_options);
                
                $colors = $this->getColors();
                if($colors)
                {
                        $json_options->colors = array();                        
                        foreach($colors as $color)
                        {
                                $json_options->colors[] = self::renderColor($color);
                        }
                }               

                // legend
                $json_options->legend = new stdClass();
                if(!$this->legend)
                {
                        $json_options->legend->show = false;
                }
                else
                {
                        $this->legend->parseOptions($json_options->legend);                     
                }
        
                $chart->setVariable("OPTIONS", json_encode($json_options));
                
                $ret = $chart->get();
                return $ret;
        }
        
        /*
        ilChart
        ->setColors
        ->setHover() [tooltip?]
        [->setClick]
        ->setZooming
        ->setPanning
        ->setTooltip
        ->addData[Series]
                - labels
                - type
                        - pie: nur 1x
                        - bar, lines, points, steps, stacked?
                - highlight?!
                => min/max, transmission type (google api)


        grid-based
        ->setGrid
        ->setTicks(color, size, decimals, length)
        ->addAxisX (multiple, Zero) [id, mode, position, color, label]
        ->addAxisY (multiple?) [id, mode, position, color, label]
        ->setBackgroundFill(opacity, color/gradient)
        ->setThreshold(int/float)
        ->setToggles(bool)

        pie
        ->setCollapse(int/float, color, label)
        ->setRotation(int angle?)
        ->setRadius(inner, outer)
        */
}

?>