Fatal error for rendering PHPExcel Stock chart with jpgraph - phpexcel

Question

I've been working with PHPExcel since a while, and so far it has done great rendering all the charts I needed. However, a problem came when I was trying to create and render (using jpgraph) a stock chart.
There wasn't any example set in the download package, but I noticed that PHPExcel do support stock graph. So I looked into the chart.xml file that Excel2007 creates and used that as a hint to make an example of my own. Below are the codes:
<?php
/** Error reporting */
error_reporting(E_ALL);
ini_set('display_errors', TRUE);
ini_set('display_startup_errors', TRUE);
date_default_timezone_set('Europe/London');
define('EOL',(PHP_SAPI == 'cli') ? PHP_EOL : '<br />');
date_default_timezone_set('Europe/London');
/**
* 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
* #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##
*/
/** PHPExcel */
require_once dirname(__FILE__) . '/../Classes/PHPExcel.php';
$objPHPExcel = new PHPExcel();
$objWorksheet = $objPHPExcel->getActiveSheet();
$objWorksheet->fromArray(
array(
array('Counts', 'Max', 'Max Threshold', 'Min Threshold', 'Min'),
array('Count 10', 10, 50, 0, 5),
array('Count 30', 20, 50, 0, 10),
array('Count 10', 30, 50, 0, 15),
array('Count 10', 10, 50, 0, 0),
), null, 'A1', true
);
$objWorksheet->getStyle('B2:E5')->getNumberFormat()->setFormatCode(PHPExcel_Style_NumberFormat::FORMAT_NUMBER_00);
// Set the Labels for each data series we want to plot
// Datatype
// Cell reference for data
// Format Code
// Number of datapoints in series
// Data values
// Data Marker
$dataseriesLabels = array(
new PHPExcel_Chart_DataSeriesValues('String', 'Worksheet!$B$1', NULL, 1), //Max / High
new PHPExcel_Chart_DataSeriesValues('String', 'Worksheet!$C$1', NULL, 1), //Max Threshold / Opening
new PHPExcel_Chart_DataSeriesValues('String', 'Worksheet!$D$1', NULL, 1), //Min Threshold / Closing
new PHPExcel_Chart_DataSeriesValues('String', 'Worksheet!$E$1', NULL, 1), //Min / Low
);
// Set the X-Axis Labels
// Datatype
// Cell reference for data
// Format Code
// Number of datapoints in series
// Data values
// Data Marker
$xAxisTickValues = array(
new PHPExcel_Chart_DataSeriesValues('String', 'Worksheet!$A$2:$A$5', NULL, 4), // Counts
);
// Set the Data values for each data series we want to plot
// Datatype
// Cell reference for data
// Format Code
// Number of datapoints in series
// Data values
// Data Marker
$dataSeriesValues = array(
new PHPExcel_Chart_DataSeriesValues('Number', 'Worksheet!$B$2:$B$5', NULL, 4),
new PHPExcel_Chart_DataSeriesValues('Number', 'Worksheet!$C$2:$C$5', NULL, 4),
new PHPExcel_Chart_DataSeriesValues('Number', 'Worksheet!$D$2:$D$5', NULL, 4),
new PHPExcel_Chart_DataSeriesValues('Number', 'Worksheet!$E$2:$E$5', NULL, 4),
);
// Build the dataseries
$series = new PHPExcel_Chart_DataSeries(
PHPExcel_Chart_DataSeries::TYPE_STOCKCHART, // plotType
null, // plotGrouping - if we set this to not null, then xlsx throws error
range(0, count($dataSeriesValues)-1), // plotOrder
$dataseriesLabels, // plotLabel
$xAxisTickValues, // plotCategory
$dataSeriesValues // plotValues
);
// Set the series in the plot area
$plotarea = new PHPExcel_Chart_PlotArea(NULL, array($series));
// Set the chart legend
$legend = new PHPExcel_Chart_Legend(PHPExcel_Chart_Legend::POSITION_RIGHT, NULL, false);
$title = new PHPExcel_Chart_Title('Test Stock Chart');
// Create the chart
$chart = new PHPExcel_Chart(
'stock-chart', // name
$title, // title
$legend, // legend
$plotarea, // plotArea
true, // plotVisibleOnly
0, // displayBlanksAs
NULL, // xAxisLabel
NULL // yAxisLabel
);
// Set the position where the chart should appear in the worksheet
$chart->setTopLeftPosition('A7');
$chart->setBottomRightPosition('H20');
// Add the chart to the worksheet
$objWorksheet->addChart($chart);
$rendererName = PHPExcel_Settings::CHART_RENDERER_JPGRAPH;
$rendererLibrary = 'jpgraph';
$rendererLibraryPath = '../' . $rendererLibrary;
if (!PHPExcel_Settings::setChartRenderer(
$rendererName,
$rendererLibraryPath
)) {
die(
'NOTICE: Please set the $rendererName and $rendererLibraryPath values' .
EOL .
'at the top of this script as appropriate for your directory structure'
);
}
$chart->render('chart-stock.jpg');
// Save Excel 2007 file
echo date('H:i:s') , " Write to Excel2007 format" , EOL;
$objWriter = PHPExcel_IOFactory::createWriter($objPHPExcel, 'Excel2007');
$objWriter->setIncludeCharts(TRUE);
$objWriter->save(str_replace('.php', '.xlsx', __FILE__));
echo date('H:i:s') , " File written to " , str_replace('.php', '.xlsx', pathinfo(__FILE__, PATHINFO_BASENAME)) , EOL;
// Echo memory peak usage
echo date('H:i:s') , " Peak memory usage: " , (memory_get_peak_usage(true) / 1024 / 1024) , " MB" , EOL;
// Echo done
echo date('H:i:s') , " Done writing file" , EOL;
echo 'File has been created in ' , getcwd() , EOL;
The code above, generates the xlsx file fine.
But the problem arrives, when I try to render the chart using jpgraph and save it. It throws a PHP Fatal error:
Fatal error: Call to a member function getDataValues() on a non-object in I:\wamp\www\phpexcel\Classes\PHPExcel\Chart\Renderer\jpgraph.php on line 525
I looked into the code and it seems, getPlotCategoryByIndex function for some reasons will not return the object. The most obvious thing I can think of is, I am not passing the plot correctly? But then again, I can not think of why and how I'd miss something in the $dataSeriesValues. Can anyone please guide me how to solve this?
Also, since I am new, I am not able to put images. So here is a link to download the screenshot, php file and the generated xlsx file.
https://dl.dropboxusercontent.com/u/129745839/PHPExcel%20Stockexchange/33chartcreate-stock.zip
Found the solution:
Okay, after a lot of trying, I finally solved it.
As it happens, the stock chart wasn't fully implemented. So I had to write the codes to complete it. Here's how to do this:
for /Classes/PHPExcel/Chart/Renderer/jpgraph.php we have to replace following two functions
private function _renderPlotStock($groupID) {
$seriesCount = $this->_chart->getPlotArea()->getPlotGroupByIndex($groupID)->getPlotSeriesCount();
$plotOrder = $this->_chart->getPlotArea()->getPlotGroupByIndex($groupID)->getPlotOrder();
$seriesPlots = array();
//var_dump($seriesCount);
$dataValues = array();
// Loop through each data series in turn
for($i = 0; $i < $seriesCount; ++$i) {
$dataValuesX = $this->_chart->getPlotArea()->getPlotGroupByIndex($groupID)->getPlotValuesByIndex($i)->getDataValues();
foreach($dataValuesX as $j => $dataValueX) {
$dataValues[$plotOrder[$i]][$j] = $dataValueX;
}
}
if(empty($dataValues)) {
return;
}
$dataValuesPlot = array();
for($j = 0; $j < count($dataValues[0]); $j++) {
for($i = 0; $i < $seriesCount; $i++) {
$dataValuesPlot[] = $dataValues[$i][$j];
}
}
$xAxisLabel = $this->_chart->getPlotArea()->getPlotGroupByIndex($groupID)->getPlotCategoryByIndex(0)->getDataValues();
var_dump($xAxisLabel);
$seriesPlot = new StockPlot($dataValuesPlot, $xAxisLabel);
$seriesPlot->SetWidth(20);
$this->_graph->Add($seriesPlot);
} // function _renderPlotStock()
and
private function _renderStockChart($groupCount) {
require_once('jpgraph_stock.php');
//$this->_renderplotara
$this->_renderCartesianPlotArea('intint');
var_dump($groupCount);
for($groupID = 0; $groupID < $groupCount; ++$groupID) {
$this->_renderPlotStock($groupID);
}
} // function _renderStockChart()
also, the new example would be something like this
<?php
/** Error reporting */
error_reporting(E_ALL);
ini_set('display_errors', TRUE);
ini_set('display_startup_errors', TRUE);
date_default_timezone_set('Europe/London');
define('EOL',(PHP_SAPI == 'cli') ? PHP_EOL : '<br />');
date_default_timezone_set('Europe/London');
/**
* 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
* #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##
*/
/** PHPExcel */
require_once dirname(__FILE__) . '/../Classes/PHPExcel.php';
$objPHPExcel = new PHPExcel();
$objWorksheet = $objPHPExcel->getActiveSheet();
$objWorksheet->fromArray(
array(
array('Counts', 'Max', 'Min', 'Min Threshold', 'Max Threshold' ),
array(10, 10, 5, 0, 50 ),
array(30, 20, 10, 0, 50 ),
array(20, 30, 15, 0, 50 ),
array(40, 10, 0, 0, 50 ),
array(100, 40, 5, 0, 50 ),
), null, 'A1', true
);
$objWorksheet->getStyle('B2:E6')->getNumberFormat()->setFormatCode(PHPExcel_Style_NumberFormat::FORMAT_NUMBER_00);
// Set the Labels for each data series we want to plot
// Datatype
// Cell reference for data
// Format Code
// Number of datapoints in series
// Data values
// Data Marker
$dataseriesLabels = array(
new PHPExcel_Chart_DataSeriesValues('String', 'Worksheet!$B$1', NULL, 1), //Max / Open
new PHPExcel_Chart_DataSeriesValues('String', 'Worksheet!$C$1', NULL, 1), //Min / Close
new PHPExcel_Chart_DataSeriesValues('String', 'Worksheet!$D$1', NULL, 1), //Min Threshold / Min
new PHPExcel_Chart_DataSeriesValues('String', 'Worksheet!$E$1', NULL, 1), //Max Threshold / Max
);
// Set the X-Axis Labels
// Datatype
// Cell reference for data
// Format Code
// Number of datapoints in series
// Data values
// Data Marker
$xAxisTickValues = array(
new PHPExcel_Chart_DataSeriesValues('String', 'Worksheet!$A$2:$A$6', NULL, 5), // Counts
);
// Set the Data values for each data series we want to plot
// Datatype
// Cell reference for data
// Format Code
// Number of datapoints in series
// Data values
// Data Marker
$dataSeriesValues = array(
new PHPExcel_Chart_DataSeriesValues('Number', 'Worksheet!$B$2:$B$6', NULL, 5),
new PHPExcel_Chart_DataSeriesValues('Number', 'Worksheet!$C$2:$C$6', NULL, 5),
new PHPExcel_Chart_DataSeriesValues('Number', 'Worksheet!$D$2:$D$6', NULL, 5),
new PHPExcel_Chart_DataSeriesValues('Number', 'Worksheet!$E$2:$E$6', NULL, 5),
);
// Build the dataseries
$series = new PHPExcel_Chart_DataSeries(
PHPExcel_Chart_DataSeries::TYPE_STOCKCHART, // plotType
null, // plotGrouping - if we set this to not null, then xlsx throws error
range(0, count($dataSeriesValues)-1), // plotOrder
$dataseriesLabels, // plotLabel
$xAxisTickValues, // plotCategory
$dataSeriesValues // plotValues
);
// Set the series in the plot area
$plotarea = new PHPExcel_Chart_PlotArea(NULL, array($series));
// Set the chart legend
$legend = new PHPExcel_Chart_Legend(PHPExcel_Chart_Legend::POSITION_RIGHT, NULL, false);
$title = new PHPExcel_Chart_Title('Test Stock Chart');
$xAxisLabel = new PHPExcel_Chart_Title('Counts');
$yAxisLabel = new PHPExcel_Chart_Title('Values');
// Create the chart
$chart = new PHPExcel_Chart(
'stock-chart', // name
$title, // title
$legend, // legend
$plotarea, // plotArea
true, // plotVisibleOnly
0, // displayBlanksAs
$xAxisLabel, // xAxisLabel
$yAxisLabel // yAxisLabel
);
// Set the position where the chart should appear in the worksheet
$chart->setTopLeftPosition('A7');
$chart->setBottomRightPosition('H20');
// Add the chart to the worksheet
$objWorksheet->addChart($chart);
$rendererName = PHPExcel_Settings::CHART_RENDERER_JPGRAPH;
$rendererLibrary = 'jpgraph';
$rendererLibraryPath = '../' . $rendererLibrary;
if (!PHPExcel_Settings::setChartRenderer(
$rendererName,
$rendererLibraryPath
)) {
die(
'NOTICE: Please set the $rendererName and $rendererLibraryPath values' .
EOL .
'at the top of this script as appropriate for your directory structure'
);
}
if(file_exists('chart-stock.jpg')) {
unlink('chart-stock.jpg');
}
$chart->render('chart-stock.jpg');
// Save Excel 2007 file
echo date('H:i:s') , " Write to Excel2007 format" , EOL;
$objWriter = PHPExcel_IOFactory::createWriter($objPHPExcel, 'Excel2007');
$objWriter->setIncludeCharts(TRUE);
$filename = str_replace('.php', '.xlsx', __FILE__);
if(file_exists($filename)) {
unlink($filename);
}
$objWriter->save($filename);
echo date('H:i:s') , " File written to " , str_replace('.php', '.xlsx', pathinfo(__FILE__, PATHINFO_BASENAME)) , EOL;
// Echo memory peak usage
echo date('H:i:s') , " Peak memory usage: " , (memory_get_peak_usage(true) / 1024 / 1024) , " MB" , EOL;
// Echo done
echo date('H:i:s') , " Done writing file" , EOL;
echo 'File has been created in ' , getcwd() , EOL;
Hope someone finds it useful.