JpGraph.php

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<?php
 
namespace PhpOffice\PhpSpreadsheet\Chart\Renderer;
 
use AccBarPlot;
use AccLinePlot;
use BarPlot;
use ContourPlot;
use Graph;
use GroupBarPlot;
use LinePlot;
use PhpOffice\PhpSpreadsheet\Chart\Chart;
use PhpOffice\PhpSpreadsheet\Style\NumberFormat;
use PieGraph;
use PiePlot;
use PiePlot3D;
use PiePlotC;
use RadarGraph;
use RadarPlot;
use ScatterPlot;
use Spline;
use StockPlot;
 
class JpGraph implements IRenderer
{
    private static $width = 640;
 
    private static $height = 480;
 
    private static $colourSet = [
        'mediumpurple1', 'palegreen3', 'gold1', 'cadetblue1',
        'darkmagenta', 'coral', 'dodgerblue3', 'eggplant',
        'mediumblue', 'magenta', 'sandybrown', 'cyan',
        'firebrick1', 'forestgreen', 'deeppink4', 'darkolivegreen',
        'goldenrod2',
    ];
 
    private static $markSet;
 
    private $chart;
 
    private $graph;
 
    private static $plotColour = 0;
 
    private static $plotMark = 0;
 
    public function __construct(Chart $chart)
    {
        self::init();
        $this->graph = null;
        $this->chart = $chart;
    }
 
    private static function init(): void
    {
        static $loaded = false;
        if ($loaded) {
            return;
        }
 
        \JpGraph\JpGraph::load();
        \JpGraph\JpGraph::module('bar');
        \JpGraph\JpGraph::module('contour');
        \JpGraph\JpGraph::module('line');
        \JpGraph\JpGraph::module('pie');
        \JpGraph\JpGraph::module('pie3d');
        \JpGraph\JpGraph::module('radar');
        \JpGraph\JpGraph::module('regstat');
        \JpGraph\JpGraph::module('scatter');
        \JpGraph\JpGraph::module('stock');
 
        self::$markSet = [
            'diamond' => MARK_DIAMOND,
            'square' => MARK_SQUARE,
            'triangle' => MARK_UTRIANGLE,
            'x' => MARK_X,
            'star' => MARK_STAR,
            'dot' => MARK_FILLEDCIRCLE,
            'dash' => MARK_DTRIANGLE,
            'circle' => MARK_CIRCLE,
            'plus' => MARK_CROSS,
        ];
 
        $loaded = true;
    }
 
    private function formatPointMarker($seriesPlot, $markerID)
    {
        $plotMarkKeys = array_keys(self::$markSet);
        if ($markerID === null) {
            //    Use default plot marker (next marker in the series)
            self::$plotMark %= count(self::$markSet);
            $seriesPlot->mark->SetType(self::$markSet[$plotMarkKeys[self::$plotMark++]]);
        } elseif ($markerID !== 'none') {
            //    Use specified plot marker (if it exists)
            if (isset(self::$markSet[$markerID])) {
                $seriesPlot->mark->SetType(self::$markSet[$markerID]);
            } else {
                //    If the specified plot marker doesn't exist, use default plot marker (next marker in the series)
                self::$plotMark %= count(self::$markSet);
                $seriesPlot->mark->SetType(self::$markSet[$plotMarkKeys[self::$plotMark++]]);
            }
        } else {
            //    Hide plot marker
            $seriesPlot->mark->Hide();
        }
        $seriesPlot->mark->SetColor(self::$colourSet[self::$plotColour]);
        $seriesPlot->mark->SetFillColor(self::$colourSet[self::$plotColour]);
        $seriesPlot->SetColor(self::$colourSet[self::$plotColour++]);
 
        return $seriesPlot;
    }
 
    private function formatDataSetLabels($groupID, $datasetLabels, $labelCount, $rotation = '')
    {
        $datasetLabelFormatCode = $this->chart->getPlotArea()->getPlotGroupByIndex($groupID)->getPlotCategoryByIndex(0)->getFormatCode();
        if ($datasetLabelFormatCode !== null) {
            //    Retrieve any label formatting code
            $datasetLabelFormatCode = stripslashes($datasetLabelFormatCode);
        }
 
        $testCurrentIndex = 0;
        foreach ($datasetLabels as $i => $datasetLabel) {
            if (is_array($datasetLabel)) {
                if ($rotation == 'bar') {
                    $datasetLabels[$i] = implode(' ', $datasetLabel);
                } else {
                    $datasetLabel = array_reverse($datasetLabel);
                    $datasetLabels[$i] = implode("\n", $datasetLabel);
                }
            } else {
                //    Format labels according to any formatting code
                if ($datasetLabelFormatCode !== null) {
                    $datasetLabels[$i] = NumberFormat::toFormattedString($datasetLabel, $datasetLabelFormatCode);
                }
            }
            ++$testCurrentIndex;
        }
 
        return $datasetLabels;
    }
 
    private function percentageSumCalculation($groupID, $seriesCount)
    {
        $sumValues = [];
        //    Adjust our values to a percentage value across all series in the group
        for ($i = 0; $i < $seriesCount; ++$i) {
            if ($i == 0) {
                $sumValues = $this->chart->getPlotArea()->getPlotGroupByIndex($groupID)->getPlotValuesByIndex($i)->getDataValues();
            } else {
                $nextValues = $this->chart->getPlotArea()->getPlotGroupByIndex($groupID)->getPlotValuesByIndex($i)->getDataValues();
                foreach ($nextValues as $k => $value) {
                    if (isset($sumValues[$k])) {
                        $sumValues[$k] += $value;
                    } else {
                        $sumValues[$k] = $value;
                    }
                }
            }
        }
 
        return $sumValues;
    }
 
    private function percentageAdjustValues($dataValues, $sumValues)
    {
        foreach ($dataValues as $k => $dataValue) {
            $dataValues[$k] = $dataValue / $sumValues[$k] * 100;
        }
 
        return $dataValues;
    }
 
    private function getCaption($captionElement)
    {
        //    Read any caption
        $caption = ($captionElement !== null) ? $captionElement->getCaption() : null;
        //    Test if we have a title caption to display
        if ($caption !== null) {
            //    If we do, it could be a plain string or an array
            if (is_array($caption)) {
                //    Implode an array to a plain string
                $caption = implode('', $caption);
            }
        }
 
        return $caption;
    }
 
    private function renderTitle(): void
    {
        $title = $this->getCaption($this->chart->getTitle());
        if ($title !== null) {
            $this->graph->title->Set($title);
        }
    }
 
    private function renderLegend(): void
    {
        $legend = $this->chart->getLegend();
        if ($legend !== null) {
            $legendPosition = $legend->getPosition();
            switch ($legendPosition) {
                case 'r':
                    $this->graph->legend->SetPos(0.01, 0.5, 'right', 'center'); //    right
                    $this->graph->legend->SetColumns(1);
 
                    break;
                case 'l':
                    $this->graph->legend->SetPos(0.01, 0.5, 'left', 'center'); //    left
                    $this->graph->legend->SetColumns(1);
 
                    break;
                case 't':
                    $this->graph->legend->SetPos(0.5, 0.01, 'center', 'top'); //    top
 
                    break;
                case 'b':
                    $this->graph->legend->SetPos(0.5, 0.99, 'center', 'bottom'); //    bottom
 
                    break;
                default:
                    $this->graph->legend->SetPos(0.01, 0.01, 'right', 'top'); //    top-right
                    $this->graph->legend->SetColumns(1);
 
                    break;
            }
        } else {
            $this->graph->legend->Hide();
        }
    }
 
    private function renderCartesianPlotArea($type = 'textlin'): void
    {
        $this->graph = new Graph(self::$width, self::$height);
        $this->graph->SetScale($type);
 
        $this->renderTitle();
 
        //    Rotate for bar rather than column chart
        $rotation = $this->chart->getPlotArea()->getPlotGroupByIndex(0)->getPlotDirection();
        $reverse = $rotation == 'bar';
 
        $xAxisLabel = $this->chart->getXAxisLabel();
        if ($xAxisLabel !== null) {
            $title = $this->getCaption($xAxisLabel);
            if ($title !== null) {
                $this->graph->xaxis->SetTitle($title, 'center');
                $this->graph->xaxis->title->SetMargin(35);
                if ($reverse) {
                    $this->graph->xaxis->title->SetAngle(90);
                    $this->graph->xaxis->title->SetMargin(90);
                }
            }
        }
 
        $yAxisLabel = $this->chart->getYAxisLabel();
        if ($yAxisLabel !== null) {
            $title = $this->getCaption($yAxisLabel);
            if ($title !== null) {
                $this->graph->yaxis->SetTitle($title, 'center');
                if ($reverse) {
                    $this->graph->yaxis->title->SetAngle(0);
                    $this->graph->yaxis->title->SetMargin(-55);
                }
            }
        }
    }
 
    private function renderPiePlotArea(): void
    {
        $this->graph = new PieGraph(self::$width, self::$height);
 
        $this->renderTitle();
    }
 
    private function renderRadarPlotArea(): void
    {
        $this->graph = new RadarGraph(self::$width, self::$height);
        $this->graph->SetScale('lin');
 
        $this->renderTitle();
    }
 
    private function renderPlotLine($groupID, $filled = false, $combination = false, $dimensions = '2d'): void
    {
        $grouping = $this->chart->getPlotArea()->getPlotGroupByIndex($groupID)->getPlotGrouping();
 
        $labelCount = $this->chart->getPlotArea()->getPlotGroupByIndex($groupID)->getPlotValuesByIndex(0)->getPointCount();
        if ($labelCount > 0) {
            $datasetLabels = $this->chart->getPlotArea()->getPlotGroupByIndex($groupID)->getPlotCategoryByIndex(0)->getDataValues();
            $datasetLabels = $this->formatDataSetLabels($groupID, $datasetLabels, $labelCount);
            $this->graph->xaxis->SetTickLabels($datasetLabels);
        }
 
        $seriesCount = $this->chart->getPlotArea()->getPlotGroupByIndex($groupID)->getPlotSeriesCount();
        $seriesPlots = [];
        if ($grouping == 'percentStacked') {
            $sumValues = $this->percentageSumCalculation($groupID, $seriesCount);
        } else {
            $sumValues = [];
        }
 
        //    Loop through each data series in turn
        for ($i = 0; $i < $seriesCount; ++$i) {
            $dataValues = $this->chart->getPlotArea()->getPlotGroupByIndex($groupID)->getPlotValuesByIndex($i)->getDataValues();
            $marker = $this->chart->getPlotArea()->getPlotGroupByIndex($groupID)->getPlotValuesByIndex($i)->getPointMarker();
 
            if ($grouping == 'percentStacked') {
                $dataValues = $this->percentageAdjustValues($dataValues, $sumValues);
            }
 
            //    Fill in any missing values in the $dataValues array
            $testCurrentIndex = 0;
            foreach ($dataValues as $k => $dataValue) {
                while ($k != $testCurrentIndex) {
                    $dataValues[$testCurrentIndex] = null;
                    ++$testCurrentIndex;
                }
                ++$testCurrentIndex;
            }
 
            $seriesPlot = new LinePlot($dataValues);
            if ($combination) {
                $seriesPlot->SetBarCenter();
            }
 
            if ($filled) {
                $seriesPlot->SetFilled(true);
                $seriesPlot->SetColor('black');
                $seriesPlot->SetFillColor(self::$colourSet[self::$plotColour++]);
            } else {
                //    Set the appropriate plot marker
                $this->formatPointMarker($seriesPlot, $marker);
            }
            $dataLabel = $this->chart->getPlotArea()->getPlotGroupByIndex($groupID)->getPlotLabelByIndex($i)->getDataValue();
            $seriesPlot->SetLegend($dataLabel);
 
            $seriesPlots[] = $seriesPlot;
        }
 
        if ($grouping == 'standard') {
            $groupPlot = $seriesPlots;
        } else {
            $groupPlot = new AccLinePlot($seriesPlots);
        }
        $this->graph->Add($groupPlot);
    }
 
    private function renderPlotBar($groupID, $dimensions = '2d'): void
    {
        $rotation = $this->chart->getPlotArea()->getPlotGroupByIndex($groupID)->getPlotDirection();
        //    Rotate for bar rather than column chart
        if (($groupID == 0) && ($rotation == 'bar')) {
            $this->graph->Set90AndMargin();
        }
        $grouping = $this->chart->getPlotArea()->getPlotGroupByIndex($groupID)->getPlotGrouping();
 
        $labelCount = $this->chart->getPlotArea()->getPlotGroupByIndex($groupID)->getPlotValuesByIndex(0)->getPointCount();
        if ($labelCount > 0) {
            $datasetLabels = $this->chart->getPlotArea()->getPlotGroupByIndex($groupID)->getPlotCategoryByIndex(0)->getDataValues();
            $datasetLabels = $this->formatDataSetLabels($groupID, $datasetLabels, $labelCount, $rotation);
            //    Rotate for bar rather than column chart
            if ($rotation == 'bar') {
                $datasetLabels = array_reverse($datasetLabels);
                $this->graph->yaxis->SetPos('max');
                $this->graph->yaxis->SetLabelAlign('center', 'top');
                $this->graph->yaxis->SetLabelSide(SIDE_RIGHT);
            }
            $this->graph->xaxis->SetTickLabels($datasetLabels);
        }
 
        $seriesCount = $this->chart->getPlotArea()->getPlotGroupByIndex($groupID)->getPlotSeriesCount();
        $seriesPlots = [];
        if ($grouping == 'percentStacked') {
            $sumValues = $this->percentageSumCalculation($groupID, $seriesCount);
        } else {
            $sumValues = [];
        }
 
        //    Loop through each data series in turn
        for ($j = 0; $j < $seriesCount; ++$j) {
            $dataValues = $this->chart->getPlotArea()->getPlotGroupByIndex($groupID)->getPlotValuesByIndex($j)->getDataValues();
            if ($grouping == 'percentStacked') {
                $dataValues = $this->percentageAdjustValues($dataValues, $sumValues);
            }
 
            //    Fill in any missing values in the $dataValues array
            $testCurrentIndex = 0;
            foreach ($dataValues as $k => $dataValue) {
                while ($k != $testCurrentIndex) {
                    $dataValues[$testCurrentIndex] = null;
                    ++$testCurrentIndex;
                }
                ++$testCurrentIndex;
            }
 
            //    Reverse the $dataValues order for bar rather than column chart
            if ($rotation == 'bar') {
                $dataValues = array_reverse($dataValues);
            }
            $seriesPlot = new BarPlot($dataValues);
            $seriesPlot->SetColor('black');
            $seriesPlot->SetFillColor(self::$colourSet[self::$plotColour++]);
            if ($dimensions == '3d') {
                $seriesPlot->SetShadow();
            }
            if (!$this->chart->getPlotArea()->getPlotGroupByIndex($groupID)->getPlotLabelByIndex($j)) {
                $dataLabel = '';
            } else {
                $dataLabel = $this->chart->getPlotArea()->getPlotGroupByIndex($groupID)->getPlotLabelByIndex($j)->getDataValue();
            }
            $seriesPlot->SetLegend($dataLabel);
 
            $seriesPlots[] = $seriesPlot;
        }
        //    Reverse the plot order for bar rather than column chart
        if (($rotation == 'bar') && ($grouping != 'percentStacked')) {
            $seriesPlots = array_reverse($seriesPlots);
        }
 
        if ($grouping == 'clustered') {
            $groupPlot = new GroupBarPlot($seriesPlots);
        } elseif ($grouping == 'standard') {
            $groupPlot = new GroupBarPlot($seriesPlots);
        } else {
            $groupPlot = new AccBarPlot($seriesPlots);
            if ($dimensions == '3d') {
                $groupPlot->SetShadow();
            }
        }
 
        $this->graph->Add($groupPlot);
    }
 
    private function renderPlotScatter($groupID, $bubble): void
    {
        $grouping = $this->chart->getPlotArea()->getPlotGroupByIndex($groupID)->getPlotGrouping();
        $scatterStyle = $bubbleSize = $this->chart->getPlotArea()->getPlotGroupByIndex($groupID)->getPlotStyle();
 
        $seriesCount = $this->chart->getPlotArea()->getPlotGroupByIndex($groupID)->getPlotSeriesCount();
        $seriesPlots = [];
 
        //    Loop through each data series in turn
        for ($i = 0; $i < $seriesCount; ++$i) {
            $dataValuesY = $this->chart->getPlotArea()->getPlotGroupByIndex($groupID)->getPlotCategoryByIndex($i)->getDataValues();
            $dataValuesX = $this->chart->getPlotArea()->getPlotGroupByIndex($groupID)->getPlotValuesByIndex($i)->getDataValues();
 
            foreach ($dataValuesY as $k => $dataValueY) {
                $dataValuesY[$k] = $k;
            }
 
            $seriesPlot = new ScatterPlot($dataValuesX, $dataValuesY);
            if ($scatterStyle == 'lineMarker') {
                $seriesPlot->SetLinkPoints();
                $seriesPlot->link->SetColor(self::$colourSet[self::$plotColour]);
            } elseif ($scatterStyle == 'smoothMarker') {
                $spline = new Spline($dataValuesY, $dataValuesX);
                [$splineDataY, $splineDataX] = $spline->Get(count($dataValuesX) * self::$width / 20);
                $lplot = new LinePlot($splineDataX, $splineDataY);
                $lplot->SetColor(self::$colourSet[self::$plotColour]);
 
                $this->graph->Add($lplot);
            }
 
            if ($bubble) {
                $this->formatPointMarker($seriesPlot, 'dot');
                $seriesPlot->mark->SetColor('black');
                $seriesPlot->mark->SetSize($bubbleSize);
            } else {
                $marker = $this->chart->getPlotArea()->getPlotGroupByIndex($groupID)->getPlotValuesByIndex($i)->getPointMarker();
                $this->formatPointMarker($seriesPlot, $marker);
            }
            $dataLabel = $this->chart->getPlotArea()->getPlotGroupByIndex($groupID)->getPlotLabelByIndex($i)->getDataValue();
            $seriesPlot->SetLegend($dataLabel);
 
            $this->graph->Add($seriesPlot);
        }
    }
 
    private function renderPlotRadar($groupID): void
    {
        $radarStyle = $this->chart->getPlotArea()->getPlotGroupByIndex($groupID)->getPlotStyle();
 
        $seriesCount = $this->chart->getPlotArea()->getPlotGroupByIndex($groupID)->getPlotSeriesCount();
        $seriesPlots = [];
 
        //    Loop through each data series in turn
        for ($i = 0; $i < $seriesCount; ++$i) {
            $dataValuesY = $this->chart->getPlotArea()->getPlotGroupByIndex($groupID)->getPlotCategoryByIndex($i)->getDataValues();
            $dataValuesX = $this->chart->getPlotArea()->getPlotGroupByIndex($groupID)->getPlotValuesByIndex($i)->getDataValues();
            $marker = $this->chart->getPlotArea()->getPlotGroupByIndex($groupID)->getPlotValuesByIndex($i)->getPointMarker();
 
            $dataValues = [];
            foreach ($dataValuesY as $k => $dataValueY) {
                $dataValues[$k] = implode(' ', array_reverse($dataValueY));
            }
            $tmp = array_shift($dataValues);
            $dataValues[] = $tmp;
            $tmp = array_shift($dataValuesX);
            $dataValuesX[] = $tmp;
 
            $this->graph->SetTitles(array_reverse($dataValues));
 
            $seriesPlot = new RadarPlot(array_reverse($dataValuesX));
 
            $dataLabel = $this->chart->getPlotArea()->getPlotGroupByIndex($groupID)->getPlotLabelByIndex($i)->getDataValue();
            $seriesPlot->SetColor(self::$colourSet[self::$plotColour++]);
            if ($radarStyle == 'filled') {
                $seriesPlot->SetFillColor(self::$colourSet[self::$plotColour]);
            }
            $this->formatPointMarker($seriesPlot, $marker);
            $seriesPlot->SetLegend($dataLabel);
 
            $this->graph->Add($seriesPlot);
        }
    }
 
    private function renderPlotContour($groupID): void
    {
        $contourStyle = $this->chart->getPlotArea()->getPlotGroupByIndex($groupID)->getPlotStyle();
 
        $seriesCount = $this->chart->getPlotArea()->getPlotGroupByIndex($groupID)->getPlotSeriesCount();
        $seriesPlots = [];
 
        $dataValues = [];
        //    Loop through each data series in turn
        for ($i = 0; $i < $seriesCount; ++$i) {
            $dataValuesY = $this->chart->getPlotArea()->getPlotGroupByIndex($groupID)->getPlotCategoryByIndex($i)->getDataValues();
            $dataValuesX = $this->chart->getPlotArea()->getPlotGroupByIndex($groupID)->getPlotValuesByIndex($i)->getDataValues();
 
            $dataValues[$i] = $dataValuesX;
        }
        $seriesPlot = new ContourPlot($dataValues);
 
        $this->graph->Add($seriesPlot);
    }
 
    private function renderPlotStock($groupID): void
    {
        $seriesCount = $this->chart->getPlotArea()->getPlotGroupByIndex($groupID)->getPlotSeriesCount();
        $plotOrder = $this->chart->getPlotArea()->getPlotGroupByIndex($groupID)->getPlotOrder();
 
        $dataValues = [];
        //    Loop through each data series in turn and build the plot arrays
        foreach ($plotOrder as $i => $v) {
            $dataValuesX = $this->chart->getPlotArea()->getPlotGroupByIndex($groupID)->getPlotValuesByIndex($v)->getDataValues();
            foreach ($dataValuesX as $j => $dataValueX) {
                $dataValues[$plotOrder[$i]][$j] = $dataValueX;
            }
        }
        if (empty($dataValues)) {
            return;
        }
 
        $dataValuesPlot = [];
        // Flatten the plot arrays to a single dimensional array to work with jpgraph
        $jMax = count($dataValues[0]);
        for ($j = 0; $j < $jMax; ++$j) {
            for ($i = 0; $i < $seriesCount; ++$i) {
                $dataValuesPlot[] = $dataValues[$i][$j];
            }
        }
 
        // Set the x-axis labels
        $labelCount = $this->chart->getPlotArea()->getPlotGroupByIndex($groupID)->getPlotValuesByIndex(0)->getPointCount();
        if ($labelCount > 0) {
            $datasetLabels = $this->chart->getPlotArea()->getPlotGroupByIndex($groupID)->getPlotCategoryByIndex(0)->getDataValues();
            $datasetLabels = $this->formatDataSetLabels($groupID, $datasetLabels, $labelCount);
            $this->graph->xaxis->SetTickLabels($datasetLabels);
        }
 
        $seriesPlot = new StockPlot($dataValuesPlot);
        $seriesPlot->SetWidth(20);
 
        $this->graph->Add($seriesPlot);
    }
 
    private function renderAreaChart($groupCount, $dimensions = '2d'): void
    {
        $this->renderCartesianPlotArea();
 
        for ($i = 0; $i < $groupCount; ++$i) {
            $this->renderPlotLine($i, true, false, $dimensions);
        }
    }
 
    private function renderLineChart($groupCount, $dimensions = '2d'): void
    {
        $this->renderCartesianPlotArea();
 
        for ($i = 0; $i < $groupCount; ++$i) {
            $this->renderPlotLine($i, false, false, $dimensions);
        }
    }
 
    private function renderBarChart($groupCount, $dimensions = '2d'): void
    {
        $this->renderCartesianPlotArea();
 
        for ($i = 0; $i < $groupCount; ++$i) {
            $this->renderPlotBar($i, $dimensions);
        }
    }
 
    private function renderScatterChart($groupCount): void
    {
        $this->renderCartesianPlotArea('linlin');
 
        for ($i = 0; $i < $groupCount; ++$i) {
            $this->renderPlotScatter($i, false);
        }
    }
 
    private function renderBubbleChart($groupCount): void
    {
        $this->renderCartesianPlotArea('linlin');
 
        for ($i = 0; $i < $groupCount; ++$i) {
            $this->renderPlotScatter($i, true);
        }
    }
 
    private function renderPieChart($groupCount, $dimensions = '2d', $doughnut = false, $multiplePlots = false): void
    {
        $this->renderPiePlotArea();
 
        $iLimit = ($multiplePlots) ? $groupCount : 1;
        for ($groupID = 0; $groupID < $iLimit; ++$groupID) {
            $grouping = $this->chart->getPlotArea()->getPlotGroupByIndex($groupID)->getPlotGrouping();
            $exploded = $this->chart->getPlotArea()->getPlotGroupByIndex($groupID)->getPlotStyle();
            $datasetLabels = [];
            if ($groupID == 0) {
                $labelCount = $this->chart->getPlotArea()->getPlotGroupByIndex($groupID)->getPlotValuesByIndex(0)->getPointCount();
                if ($labelCount > 0) {
                    $datasetLabels = $this->chart->getPlotArea()->getPlotGroupByIndex($groupID)->getPlotCategoryByIndex(0)->getDataValues();
                    $datasetLabels = $this->formatDataSetLabels($groupID, $datasetLabels, $labelCount);
                }
            }
 
            $seriesCount = $this->chart->getPlotArea()->getPlotGroupByIndex($groupID)->getPlotSeriesCount();
            $seriesPlots = [];
            //    For pie charts, we only display the first series: doughnut charts generally display all series
            $jLimit = ($multiplePlots) ? $seriesCount : 1;
            //    Loop through each data series in turn
            for ($j = 0; $j < $jLimit; ++$j) {
                $dataValues = $this->chart->getPlotArea()->getPlotGroupByIndex($groupID)->getPlotValuesByIndex($j)->getDataValues();
 
                //    Fill in any missing values in the $dataValues array
                $testCurrentIndex = 0;
                foreach ($dataValues as $k => $dataValue) {
                    while ($k != $testCurrentIndex) {
                        $dataValues[$testCurrentIndex] = null;
                        ++$testCurrentIndex;
                    }
                    ++$testCurrentIndex;
                }
 
                if ($dimensions == '3d') {
                    $seriesPlot = new PiePlot3D($dataValues);
                } else {
                    if ($doughnut) {
                        $seriesPlot = new PiePlotC($dataValues);
                    } else {
                        $seriesPlot = new PiePlot($dataValues);
                    }
                }
 
                if ($multiplePlots) {
                    $seriesPlot->SetSize(($jLimit - $j) / ($jLimit * 4));
                }
 
                if ($doughnut) {
                    $seriesPlot->SetMidColor('white');
                }
 
                $seriesPlot->SetColor(self::$colourSet[self::$plotColour++]);
                if (count($datasetLabels) > 0) {
                    $seriesPlot->SetLabels(array_fill(0, count($datasetLabels), ''));
                }
                if ($dimensions != '3d') {
                    $seriesPlot->SetGuideLines(false);
                }
                if ($j == 0) {
                    if ($exploded) {
                        $seriesPlot->ExplodeAll();
                    }
                    $seriesPlot->SetLegends($datasetLabels);
                }
 
                $this->graph->Add($seriesPlot);
            }
        }
    }
 
    private function renderRadarChart($groupCount): void
    {
        $this->renderRadarPlotArea();
 
        for ($groupID = 0; $groupID < $groupCount; ++$groupID) {
            $this->renderPlotRadar($groupID);
        }
    }
 
    private function renderStockChart($groupCount): void
    {
        $this->renderCartesianPlotArea('intint');
 
        for ($groupID = 0; $groupID < $groupCount; ++$groupID) {
            $this->renderPlotStock($groupID);
        }
    }
 
    private function renderContourChart($groupCount, $dimensions): void
    {
        $this->renderCartesianPlotArea('intint');
 
        for ($i = 0; $i < $groupCount; ++$i) {
            $this->renderPlotContour($i);
        }
    }
 
    private function renderCombinationChart($groupCount, $dimensions, $outputDestination)
    {
        $this->renderCartesianPlotArea();
 
        for ($i = 0; $i < $groupCount; ++$i) {
            $dimensions = null;
            $chartType = $this->chart->getPlotArea()->getPlotGroupByIndex($i)->getPlotType();
            switch ($chartType) {
                case 'area3DChart':
                    $dimensions = '3d';
                // no break
                case 'areaChart':
                    $this->renderPlotLine($i, true, true, $dimensions);
 
                    break;
                case 'bar3DChart':
                    $dimensions = '3d';
                // no break
                case 'barChart':
                    $this->renderPlotBar($i, $dimensions);
 
                    break;
                case 'line3DChart':
                    $dimensions = '3d';
                // no break
                case 'lineChart':
                    $this->renderPlotLine($i, false, true, $dimensions);
 
                    break;
                case 'scatterChart':
                    $this->renderPlotScatter($i, false);
 
                    break;
                case 'bubbleChart':
                    $this->renderPlotScatter($i, true);
 
                    break;
                default:
                    $this->graph = null;
 
                    return false;
            }
        }
 
        $this->renderLegend();
 
        $this->graph->Stroke($outputDestination);
 
        return true;
    }
 
    public function render($outputDestination)
    {
        self::$plotColour = 0;
 
        $groupCount = $this->chart->getPlotArea()->getPlotGroupCount();
 
        $dimensions = null;
        if ($groupCount == 1) {
            $chartType = $this->chart->getPlotArea()->getPlotGroupByIndex(0)->getPlotType();
        } else {
            $chartTypes = [];
            for ($i = 0; $i < $groupCount; ++$i) {
                $chartTypes[] = $this->chart->getPlotArea()->getPlotGroupByIndex($i)->getPlotType();
            }
            $chartTypes = array_unique($chartTypes);
            if (count($chartTypes) == 1) {
                $chartType = array_pop($chartTypes);
            } elseif (count($chartTypes) == 0) {
                echo 'Chart is not yet implemented<br />';
 
                return false;
            } else {
                return $this->renderCombinationChart($groupCount, $dimensions, $outputDestination);
            }
        }
 
        switch ($chartType) {
            case 'area3DChart':
                $dimensions = '3d';
            // no break
            case 'areaChart':
                $this->renderAreaChart($groupCount, $dimensions);
 
                break;
            case 'bar3DChart':
                $dimensions = '3d';
            // no break
            case 'barChart':
                $this->renderBarChart($groupCount, $dimensions);
 
                break;
            case 'line3DChart':
                $dimensions = '3d';
            // no break
            case 'lineChart':
                $this->renderLineChart($groupCount, $dimensions);
 
                break;
            case 'pie3DChart':
                $dimensions = '3d';
            // no break
            case 'pieChart':
                $this->renderPieChart($groupCount, $dimensions, false, false);
 
                break;
            case 'doughnut3DChart':
                $dimensions = '3d';
            // no break
            case 'doughnutChart':
                $this->renderPieChart($groupCount, $dimensions, true, true);
 
                break;
            case 'scatterChart':
                $this->renderScatterChart($groupCount);
 
                break;
            case 'bubbleChart':
                $this->renderBubbleChart($groupCount);
 
                break;
            case 'radarChart':
                $this->renderRadarChart($groupCount);
 
                break;
            case 'surface3DChart':
                $dimensions = '3d';
            // no break
            case 'surfaceChart':
                $this->renderContourChart($groupCount, $dimensions);
 
                break;
            case 'stockChart':
                $this->renderStockChart($groupCount);
 
                break;
            default:
                echo $chartType . ' is not yet implemented<br />';
 
                return false;
        }
        $this->renderLegend();
 
        $this->graph->Stroke($outputDestination);
 
        return true;
    }
}