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<?php

/**
 * PHPExcel
 *
 * Copyright (c) 2006 - 2013 PHPExcel
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 *
 * @category    PHPExcel
 * @package             PHPExcel_Chart_Renderer
 * @copyright   Copyright (c) 2006 - 2013 PHPExcel (http://www.codeplex.com/PHPExcel)
 * @license             http://www.gnu.org/licenses/old-licenses/lgpl-2.1.txt   LGPL
 * @version             ##VERSION##, ##DATE##
 */


require_once(PHPExcel_Settings::getChartRendererPath().'/jpgraph.php');


/**
 * PHPExcel_Chart_Renderer_jpgraph
 *
 * @category    PHPExcel
 * @package             PHPExcel_Chart_Renderer
 * @copyright   Copyright (c) 2006 - 2013 PHPExcel (http://www.codeplex.com/PHPExcel)
 */
class PHPExcel_Chart_Renderer_jpgraph
{
        private static $_width  = 640;

        private static $_height = 480;

        private static $_colourSet = array( 'mediumpurple1',    'palegreen3',   'gold1',                'cadetblue1',
                                                                                'darkmagenta',          'coral',                'dodgerblue3',  'eggplant',
                                                                                'mediumblue',           'magenta',              'sandybrown',   'cyan',
                                                                                'firebrick1',           'forestgreen',  'deeppink4',    'darkolivegreen',
                                                                                'goldenrod2'
                                                                          );

        private static $_markSet = array(       '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
                                                                        );


        private $_chart = null;

        private $_graph = null;

        private static $_plotColour     = 0;

        private static $_plotMark       = 0;


        private function _formatPointMarker($seriesPlot,$markerID) {
                $plotMarkKeys = array_keys(self::$_markSet);
                if (is_null($markerID)) {
                        //      Use default plot marker (next marker in the series)
                        self::$_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;
        }       //      function _formatPointMarker()


        private function _formatDataSetLabels($groupID, $datasetLabels, $labelCount, $rotation = '') {
                $datasetLabelFormatCode = $this->_chart->getPlotArea()->getPlotGroupByIndex($groupID)->getPlotCategoryByIndex(0)->getFormatCode();
                if (!is_null($datasetLabelFormatCode)) {
                        //      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",$datasetLabel);
                                }
                        } else {
                                //      Format labels according to any formatting code
                                if (!is_null($datasetLabelFormatCode)) {
                                        $datasetLabels[$i] = PHPExcel_Style_NumberFormat::toFormattedString($datasetLabel,$datasetLabelFormatCode);
                                }
                        }
                        ++$testCurrentIndex;
                }

                return $datasetLabels;
        }       //      function _formatDataSetLabels()


        private function _percentageSumCalculation($groupID,$seriesCount) {
                //      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;
        }       //      function _percentageSumCalculation()


        private function _percentageAdjustValues($dataValues,$sumValues) {
                foreach($dataValues as $k => $dataValue) {
                        $dataValues[$k] = $dataValue / $sumValues[$k] * 100;
                }

                return $dataValues;
        }       //      function _percentageAdjustValues()


        private function _getCaption($captionElement) {
                //      Read any caption
                $caption = (!is_null($captionElement)) ? $captionElement->getCaption() : NULL;
                //      Test if we have a title caption to display
                if (!is_null($caption)) {
                        //      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;
        }       //      function _getCaption()


        private function _renderTitle() {
                $title = $this->_getCaption($this->_chart->getTitle());
                if (!is_null($title)) {
                        $this->_graph->title->Set($title);
                }
        }       //      function _renderTitle()


        private function _renderLegend() {
                $legend = $this->_chart->getLegend();
                if (!is_null($legend)) {
                        $legendPosition = $legend->getPosition();
                        $legendOverlay = $legend->getOverlay();
                        switch ($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();
                }
        }       //      function _renderLegend()


        private function _renderCartesianPlotArea($type='textlin') {
                $this->_graph = new Graph(self::$_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') ? true : false;

                $xAxisLabel = $this->_chart->getXAxisLabel();
                if (!is_null($xAxisLabel)) {
                        $title = $this->_getCaption($xAxisLabel);
                        if (!is_null($title)) {
                                $this->_graph->xaxis->SetTitle($title,'center');
                                $this->_graph->xaxis->title->SetMargin(35);
                                if ($reverse) {
                                        $this->_graph->xaxis->title->SetAngle(90);
                                        $this->_graph->xaxis->title->SetMargin(90);
                                }
                        }
                }

                $yAxisLabel = $this->_chart->getYAxisLabel();
                if (!is_null($yAxisLabel)) {
                        $title = $this->_getCaption($yAxisLabel);
                        if (!is_null($title)) {
                                $this->_graph->yaxis->SetTitle($title,'center');
                                if ($reverse) {
                                        $this->_graph->yaxis->title->SetAngle(0);
                                        $this->_graph->yaxis->title->SetMargin(-55);
                                }
                        }
                }
        }       //      function _renderCartesianPlotArea()


        private function _renderPiePlotArea($doughnut = False) {
                $this->_graph = new PieGraph(self::$_width,self::$_height);

                $this->_renderTitle();
        }       //      function _renderPiePlotArea()


        private function _renderRadarPlotArea() {
                $this->_graph = new RadarGraph(self::$_width,self::$_height);
                $this->_graph->SetScale('lin');

                $this->_renderTitle();
        }       //      function _renderRadarPlotArea()


        private function _renderPlotLine($groupID, $filled = false, $combination = false, $dimensions = '2d') {
                $grouping = $this->_chart->getPlotArea()->getPlotGroupByIndex($groupID)->getPlotGrouping();

        $labelCount = count($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();
                $seriesPlots = array();
                if ($grouping == 'percentStacked') {
                        $sumValues = $this->_percentageSumCalculation($groupID,$seriesCount);
                }

                //      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);
        }       //      function _renderPlotLine()


        private function _renderPlotBar($groupID, $dimensions = '2d') {
                $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();

        $labelCount = count($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();
                $seriesPlots = array();
                if ($grouping == 'percentStacked') {
                        $sumValues = $this->_percentageSumCalculation($groupID,$seriesCount);
                }

                //      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);
        }       //      function _renderPlotBar()


        private function _renderPlotScatter($groupID,$bubble) {
                $grouping = $this->_chart->getPlotArea()->getPlotGroupByIndex($groupID)->getPlotGrouping();
                $scatterStyle = $bubbleSize = $this->_chart->getPlotArea()->getPlotGroupByIndex($groupID)->getPlotStyle();

                $seriesCount = $this->_chart->getPlotArea()->getPlotGroupByIndex($groupID)->getPlotSeriesCount();
                $seriesPlots = array();

                //      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,$dataValuesX);
                                list($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);
                }
        }       //      function _renderPlotScatter()


        private function _renderPlotRadar($groupID) {
                $radarStyle = $this->_chart->getPlotArea()->getPlotGroupByIndex($groupID)->getPlotStyle();

                $seriesCount = $this->_chart->getPlotArea()->getPlotGroupByIndex($groupID)->getPlotSeriesCount();
                $seriesPlots = array();

                //      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();

                        $dataValues = array();
                        foreach($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);
                }
        }       //      function _renderPlotRadar()


        private function _renderPlotContour($groupID) {
                $contourStyle = $this->_chart->getPlotArea()->getPlotGroupByIndex($groupID)->getPlotStyle();

                $seriesCount = $this->_chart->getPlotArea()->getPlotGroupByIndex($groupID)->getPlotSeriesCount();
                $seriesPlots = array();

                $dataValues = array();
                //      Loop through each data series in turn
                for($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);
        }       //      function _renderPlotContour()


        private function _renderPlotStock($groupID) {
                $seriesCount = $this->_chart->getPlotArea()->getPlotGroupByIndex($groupID)->getPlotSeriesCount();
                $plotOrder = $this->_chart->getPlotArea()->getPlotGroupByIndex($groupID)->getPlotOrder();
                $seriesPlots = array();

                $dataValues = array();
                //      Loop through each data series in turn
                for($i = 0; $i < $seriesCount; ++$i) {
                        $dataValuesY = $this->_chart->getPlotArea()->getPlotGroupByIndex($groupID)->getPlotCategoryByIndex($i)->getDataValues();
                        $dataValuesX = $this->_chart->getPlotArea()->getPlotGroupByIndex($groupID)->getPlotValuesByIndex($i)->getDataValues();

                        foreach($dataValuesX as $j => $dataValueX)
                        $dataValues[$j][$plotOrder[$i]] = $dataValueX;
                }

                $seriesPlot = new StockPlot($dataValues);

                $this->_graph->Add($seriesPlot);
        }       //      function _renderPlotStock()


        private function _renderAreaChart($groupCount, $dimensions = '2d') {
                require_once('jpgraph_line.php');

                $this->_renderCartesianPlotArea();

                for($i = 0; $i < $groupCount; ++$i) {
                        $this->_renderPlotLine($i,True,False,$dimensions);
                }
        }       //      function _renderAreaChart()


        private function _renderLineChart($groupCount, $dimensions = '2d') {
                require_once('jpgraph_line.php');

                $this->_renderCartesianPlotArea();

                for($i = 0; $i < $groupCount; ++$i) {
                        $this->_renderPlotLine($i,False,False,$dimensions);
                }
        }       //      function _renderLineChart()


        private function _renderBarChart($groupCount, $dimensions = '2d') {
                require_once('jpgraph_bar.php');

                $this->_renderCartesianPlotArea();

                for($i = 0; $i < $groupCount; ++$i) {
                        $this->_renderPlotBar($i,$dimensions);
                }
        }       //      function _renderBarChart()


        private function _renderScatterChart($groupCount) {
                require_once('jpgraph_scatter.php');
                require_once('jpgraph_regstat.php');
                require_once('jpgraph_line.php');

                $this->_renderCartesianPlotArea('linlin');

                for($i = 0; $i < $groupCount; ++$i) {
                        $this->_renderPlotScatter($i,false);
                }
        }       //      function _renderScatterChart()


        private function _renderBubbleChart($groupCount) {
                require_once('jpgraph_scatter.php');

                $this->_renderCartesianPlotArea('linlin');

                for($i = 0; $i < $groupCount; ++$i) {
                        $this->_renderPlotScatter($i,true);
                }
        }       //      function _renderBubbleChart()


        private function _renderPieChart($groupCount, $dimensions = '2d', $doughnut = False, $multiplePlots = False) {
                require_once('jpgraph_pie.php');
                if ($dimensions == '3d') {
                        require_once('jpgraph_pie3d.php');
                }

                $this->_renderPiePlotArea($doughnut);

                $iLimit = ($multiplePlots) ? $groupCount : 1;
                for($groupID = 0; $groupID < $iLimit; ++$groupID) {
                        $grouping = $this->_chart->getPlotArea()->getPlotGroupByIndex($groupID)->getPlotGrouping();
                        $exploded = $this->_chart->getPlotArea()->getPlotGroupByIndex($groupID)->getPlotStyle();
                        if ($groupID == 0) {
                        $labelCount = count($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 = array();
                        //      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);
                        }
                }
        }       //      function _renderPieChart()


        private function _renderRadarChart($groupCount) {
                require_once('jpgraph_radar.php');

                $this->_renderRadarPlotArea();

                for($groupID = 0; $groupID < $groupCount; ++$groupID) {
                        $this->_renderPlotRadar($groupID);
                }
        }       //      function _renderRadarChart()


        private function _renderStockChart($groupCount) {
                require_once('jpgraph_stock.php');

                $this->_renderCartesianPlotArea();

                for($groupID = 0; $groupID < $groupCount; ++$i) {
                        $this->_renderPlotStock($groupID);
                }
        }       //      function _renderStockChart()


        private function _renderContourChart($groupCount,$dimensions) {
                require_once('jpgraph_contour.php');

                $this->_renderCartesianPlotArea('intint');

                for($i = 0; $i < $groupCount; ++$i) {
                        $this->_renderPlotContour($i);
                }
        }       //      function _renderContourChart()


        private function _renderCombinationChart($groupCount,$dimensions,$outputDestination) {
                require_once('jpgraph_line.php');
                require_once('jpgraph_bar.php');
                require_once('jpgraph_scatter.php');
                require_once('jpgraph_regstat.php');
                require_once('jpgraph_line.php');

                $this->_renderCartesianPlotArea();

                for($i = 0; $i < $groupCount; ++$i) {
                        $dimensions = null;
                        $chartType = $this->_chart->getPlotArea()->getPlotGroupByIndex($i)->getPlotType();
                        switch ($chartType) {
                                case 'area3DChart' :
                                        $dimensions = '3d';
                                case 'areaChart' :
                                        $this->_renderPlotLine($i,True,True,$dimensions);
                                        break;
                                case 'bar3DChart' :
                                        $dimensions = '3d';
                                case 'barChart' :
                                        $this->_renderPlotBar($i,$dimensions);
                                        break;
                                case 'line3DChart' :
                                        $dimensions = '3d';
                                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;
        }       //      function _renderCombinationChart()


        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 {
                        $chartTypes = array();
                        for($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';
                        case 'areaChart' :
                                $this->_renderAreaChart($groupCount,$dimensions);
                                break;
                        case 'bar3DChart' :
                                $dimensions = '3d';
                        case 'barChart' :
                                $this->_renderBarChart($groupCount,$dimensions);
                                break;
                        case 'line3DChart' :
                                $dimensions = '3d';
                        case 'lineChart' :
                                $this->_renderLineChart($groupCount,$dimensions);
                                break;
                        case 'pie3DChart' :
                                $dimensions = '3d';
                        case 'pieChart' :
                                $this->_renderPieChart($groupCount,$dimensions,False,False);
                                break;
                        case 'doughnut3DChart' :
                                $dimensions = '3d';
                        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';
                        case 'surfaceChart' :
                                $this->_renderContourChart($groupCount,$dimensions);
                                break;
                        case 'stockChart' :
                                $this->_renderStockChart($groupCount,$dimensions);
                                break;
                        default :
                                echo $chartType.' is not yet implemented<br />';
                                return false;
                }
                $this->_renderLegend();

                $this->_graph->Stroke($outputDestination);
                return true;
        }       //      function render()


        /**
         * Create a new PHPExcel_Chart_Renderer_jpgraph
         */
        public function __construct(PHPExcel_Chart $chart)
        {
                $this->_graph   = null;
                $this->_chart   = $chart;
        }       //      function __construct()

}       //      PHPExcel_Chart_Renderer_jpgraph