Add Support to Chart/Axis for Glow/SoftEdges (#2865)

* Add Support to Chart/Axis for Glow/SoftEdges

Chart is very under-covered in unit tests. I was hoping to just add some tests and be done with it, but that just won't suffice - many code changes are required. Adding Glow properties for Axis turned out to be a real mixed bag - no support in Xlsx/Reader at all, support in Xlsx/Writer ... for the X-axis only. So we'll just inch forward in many stages.

This change does not address other Axis properties (Fill, Shadow, Line, LineStyle, and maybe others, and their sub-properties). On my to-do list.

GridLines, and maybe other Chart objects, also should support these properties. This change does not address those. On my to-do list.

No support is added for spreadsheet formats other than Xlsx.

* Refactoring

This should make the code easier to follow, and I hope it will also be extensible to other object types (e.g. GridLines).

* More Refactoring

Make scheme/srgb easier to handle.

* Fix Typo

In a very rarely used function.

phpstan-baseline.neon

@@ -1110,31 +1110,6 @@ parameters:
 			count: 1
 			path: src/PhpSpreadsheet/Cell/Coordinate.php
 
-		-
-			message: "#^Parameter \\#1 \\$textValue of static method PhpOffice\\\\PhpSpreadsheet\\\\Shared\\\\StringHelper\\:\\:substring\\(\\) expects string, string\\|null given\\.$#"
-			count: 1
-			path: src/PhpSpreadsheet/Cell/DataType.php
-
-		-
-			message: "#^Parameter \\#1 \\$angle of method PhpOffice\\\\PhpSpreadsheet\\\\Chart\\\\Axis\\:\\:setShadowAngle\\(\\) expects int, int\\|null given\\.$#"
-			count: 1
-			path: src/PhpSpreadsheet/Chart/Axis.php
-
-		-
-			message: "#^Parameter \\#1 \\$blur of method PhpOffice\\\\PhpSpreadsheet\\\\Chart\\\\Axis\\:\\:setShadowBlur\\(\\) expects float, float\\|null given\\.$#"
-			count: 1
-			path: src/PhpSpreadsheet/Chart/Axis.php
-
-		-
-			message: "#^Parameter \\#1 \\$distance of method PhpOffice\\\\PhpSpreadsheet\\\\Chart\\\\Axis\\:\\:setShadowDistance\\(\\) expects float, float\\|null given\\.$#"
-			count: 1
-			path: src/PhpSpreadsheet/Chart/Axis.php
-
-		-
-			message: "#^Parameter \\#2 \\$alpha of method PhpOffice\\\\PhpSpreadsheet\\\\Chart\\\\Axis\\:\\:setShadowColor\\(\\) expects int, int\\|string given\\.$#"
-			count: 1
-			path: src/PhpSpreadsheet/Chart/Axis.php
-
 		-
 			message: "#^Call to an undefined method object\\:\\:render\\(\\)\\.$#"
 			count: 1

src/PhpSpreadsheet/Chart/Axis.php

@@ -346,17 +346,17 @@ class Axis extends Properties
      * @param int $shadowPresets
      * @param string $colorValue
      * @param string $colorType
-     * @param string $colorAlpha
-     * @param float $blur
-     * @param int $angle
-     * @param float $distance
+     * @param null|int|string $colorAlpha
+     * @param null|float $blur
+     * @param null|int $angle
+     * @param null|float $distance
      */
     public function setShadowProperties($shadowPresets, $colorValue = null, $colorType = null, $colorAlpha = null, $blur = null, $angle = null, $distance = null): void
     {
         $this->setShadowPresetsProperties((int) $shadowPresets)
             ->setShadowColor(
                 $colorValue ?? $this->shadowProperties['color']['value'],
-                $colorAlpha ?? (int) $this->shadowProperties['color']['alpha'],
+                (int) ($colorAlpha ?? $this->shadowProperties['color']['alpha']),
                 $colorType ?? $this->shadowProperties['color']['type']
             )
             ->setShadowBlur($blur)
@@ -412,9 +412,9 @@ class Axis extends Properties
     /**
      * Set Shadow Color.
      *
-     * @param string $color
-     * @param int $alpha
-     * @param string $alphaType
+     * @param null|string $color
+     * @param null|int $alpha
+     * @param null|string $alphaType
      *
      * @return $this
      */
@@ -428,7 +428,7 @@ class Axis extends Properties
     /**
      * Set Shadow Blur.
      *
-     * @param float $blur
+     * @param null|float $blur
      *
      * @return $this
      */
@@ -444,7 +444,7 @@ class Axis extends Properties
     /**
      * Set Shadow Angle.
      *
-     * @param int $angle
+     * @param null|int $angle
      *
      * @return $this
      */
@@ -460,7 +460,7 @@ class Axis extends Properties
     /**
      * Set Shadow Distance.
      *
-     * @param float $distance
+     * @param null|float $distance
      *
      * @return $this
      */
@@ -489,9 +489,9 @@ class Axis extends Properties
      * Set Glow Properties.
      *
      * @param float $size
-     * @param string $colorValue
-     * @param int $colorAlpha
-     * @param string $colorType
+     * @param null|string $colorValue
+     * @param null|int $colorAlpha
+     * @param null|string $colorType
      */
     public function setGlowProperties($size, $colorValue = null, $colorAlpha = null, $colorType = null): void
     {
@@ -508,7 +508,7 @@ class Axis extends Properties
      *
      * @param array|string $property
      *
-     * @return string
+     * @return null|string
      */
     public function getGlowProperty($property)
     {
@@ -555,7 +555,7 @@ class Axis extends Properties
     public function setSoftEdges($size): void
     {
         if ($size !== null) {
-            $softEdges['size'] = (string) $this->getExcelPointsWidth($size);
+            $this->softEdges['size'] = (string) $this->getExcelPointsWidth($size);
         }
     }
 

src/PhpSpreadsheet/Chart/Properties.php

@@ -110,6 +110,7 @@ abstract class Properties
     const SHADOW_PRESETS_PERSPECTIVE_UPPER_LEFT = 21;
     const SHADOW_PRESETS_PERSPECTIVE_LOWER_RIGHT = 22;
     const SHADOW_PRESETS_PERSPECTIVE_LOWER_LEFT = 23;
+    const POINTS_WIDTH_MULTIPLIER = 12700;
 
     /**
      * @param float $width
@@ -118,7 +119,7 @@ abstract class Properties
      */
     protected function getExcelPointsWidth($width)
     {
-        return $width * 12700;
+        return $width * self::POINTS_WIDTH_MULTIPLIER;
     }
 
     /**
@@ -133,7 +134,7 @@ abstract class Properties
 
     protected function getTrueAlpha($alpha)
     {
-        return (string) 100 - $alpha . '000';
+        return (string) (100 - $alpha) . '000';
     }
 
     protected function setColorProperties($color, $alpha, $colorType)

src/PhpSpreadsheet/Reader/Xlsx/Chart.php

@@ -3,11 +3,13 @@
 namespace PhpOffice\PhpSpreadsheet\Reader\Xlsx;
 
 use PhpOffice\PhpSpreadsheet\Calculation\Information\ExcelError;
+use PhpOffice\PhpSpreadsheet\Chart\Axis;
 use PhpOffice\PhpSpreadsheet\Chart\DataSeries;
 use PhpOffice\PhpSpreadsheet\Chart\DataSeriesValues;
 use PhpOffice\PhpSpreadsheet\Chart\Layout;
 use PhpOffice\PhpSpreadsheet\Chart\Legend;
 use PhpOffice\PhpSpreadsheet\Chart\PlotArea;
+use PhpOffice\PhpSpreadsheet\Chart\Properties;
 use PhpOffice\PhpSpreadsheet\Chart\Title;
 use PhpOffice\PhpSpreadsheet\RichText\RichText;
 use PhpOffice\PhpSpreadsheet\Style\Color;
@@ -67,6 +69,8 @@ class Chart
         $dispBlanksAs = $plotVisOnly = null;
         $plotArea = null;
         $rotX = $rotY = $rAngAx = $perspective = null;
+        $xAxis = new Axis();
+        $yAxis = new Axis();
         foreach ($chartElementsC as $chartElementKey => $chartElement) {
             switch ($chartElementKey) {
                 case 'chart':
@@ -93,6 +97,7 @@ class Chart
                                             if (isset($chartDetail->title)) {
                                                 $XaxisLabel = $this->chartTitle($chartDetail->title->children($this->cNamespace));
                                             }
+                                            $this->readEffects($chartDetail, $xAxis);
 
                                             break;
                                         case 'dateAx':
@@ -102,6 +107,7 @@ class Chart
 
                                             break;
                                         case 'valAx':
+                                            $whichAxis = null;
                                             if (isset($chartDetail->title, $chartDetail->axPos)) {
                                                 $axisLabel = $this->chartTitle($chartDetail->title->children($this->cNamespace));
                                                 $axPos = self::getAttribute($chartDetail->axPos, 'val', 'string');
@@ -110,15 +116,18 @@ class Chart
                                                     case 't':
                                                     case 'b':
                                                         $XaxisLabel = $axisLabel;
+                                                        $whichAxis = $xAxis;
 
                                                         break;
                                                     case 'r':
                                                     case 'l':
                                                         $YaxisLabel = $axisLabel;
+                                                        $whichAxis = $yAxis;
 
                                                         break;
                                                 }
                                             }
+                                            $this->readEffects($chartDetail, $whichAxis);
 
                                             break;
                                         case 'barChart':
@@ -240,7 +249,7 @@ class Chart
                     }
             }
         }
-        $chart = new \PhpOffice\PhpSpreadsheet\Chart\Chart($chartName, $title, $legend, $plotArea, $plotVisOnly, (string) $dispBlanksAs, $XaxisLabel, $YaxisLabel);
+        $chart = new \PhpOffice\PhpSpreadsheet\Chart\Chart($chartName, $title, $legend, $plotArea, $plotVisOnly, (string) $dispBlanksAs, $XaxisLabel, $YaxisLabel, $xAxis, $yAxis);
         if (is_int($rotX)) {
             $chart->setRotX($rotX);
         }
@@ -345,9 +354,8 @@ class Chart
                                 if (is_countable($ln->noFill) && count($ln->noFill) === 1) {
                                     $noFill = true;
                                 }
-                                $sf = $children->solidFill->schemeClr;
-                                if ($sf) {
-                                    $schemeClr = self::getAttribute($sf, 'val', 'string');
+                                if (isset($children->solidFill)) {
+                                    $this->readColor($children->solidFill, $srgbClr, $schemeClr);
                                 }
 
                                 break;
@@ -357,8 +365,8 @@ class Chart
                                 $pointSize = is_numeric($pointSize) ? ((int) $pointSize) : null;
                                 if (count($seriesDetail->spPr) === 1) {
                                     $ln = $seriesDetail->spPr->children($this->aNamespace);
-                                    if (count($ln->solidFill) === 1) {
-                                        $srgbClr = self::getAttribute($ln->solidFill->srgbClr, 'val', 'string');
+                                    if (isset($ln->solidFill)) {
+                                        $this->readColor($ln->solidFill, $srgbClr, $schemeClr);
                                     }
                                 }
 
@@ -603,7 +611,8 @@ class Chart
         $defaultLatin = null;
         $defaultEastAsian = null;
         $defaultComplexScript = null;
-        $defaultColor = null;
+        $defaultSrgbColor = '';
+        $defaultSchemeColor = '';
         if (isset($titleDetailPart->pPr->defRPr)) {
             /** @var ?int */
             $defaultFontSize = self::getAttribute($titleDetailPart->pPr->defRPr, 'sz', 'integer');
@@ -632,9 +641,8 @@ class Chart
                 /** @var ?string */
                 $defaultComplexScript = self::getAttribute($titleDetailPart->pPr->defRPr->cs, 'typeface', 'string');
             }
-            if (isset($titleDetailPart->pPr->defRPr->solidFill->srgbClr)) {
-                /** @var ?string */
-                $defaultColor = self::getAttribute($titleDetailPart->pPr->defRPr->solidFill->srgbClr, 'val', 'string');
+            if (isset($titleDetailPart->pPr->defRPr->solidFill)) {
+                $this->readColor($titleDetailPart->pPr->defRPr->solidFill, $defaultSrgbColor, $defaultSchemeClr);
             }
         }
         foreach ($titleDetailPart as $titleDetailElementKey => $titleDetailElement) {
@@ -660,7 +668,8 @@ class Chart
             $latinName = null;
             $eastAsian = null;
             $complexScript = null;
-            $fontColor = null;
+            $fontSrgbClr = '';
+            $fontSchemeClr = '';
             $uSchemeClr = null;
             if (isset($titleDetailElement->rPr)) {
                 // not used now, not sure it ever was, grandfathering
@@ -686,10 +695,9 @@ class Chart
 
                 // not used now, not sure it ever was, grandfathering
                 /** @var ?string */
-                $fontColor = self::getAttribute($titleDetailElement->rPr, 'color', 'string');
-                if (isset($titleDetailElement->rPr->solidFill->srgbClr)) {
-                    /** @var ?string */
-                    $fontColor = self::getAttribute($titleDetailElement->rPr->solidFill->srgbClr, 'val', 'string');
+                $fontSrgbClr = self::getAttribute($titleDetailElement->rPr, 'color', 'string');
+                if (isset($titleDetailElement->rPr->solidFill)) {
+                    $this->readColor($titleDetailElement->rPr->solidFill, $fontSrgbClr, $fontSchemeClr);
                 }
 
                 /** @var ?bool */
@@ -742,11 +750,17 @@ class Chart
                 $fontFound = true;
             }
 
-            $fontColor = $fontColor ?? $defaultColor;
-            if ($fontColor !== null) {
-                $objText->getFont()->setColor(new Color($fontColor));
+            $fontSrgbClr = $fontSrgbClr ?? $defaultSrgbColor;
+            if (!empty($fontSrgbClr)) {
+                $objText->getFont()->setColor(new Color($fontSrgbClr));
                 $fontFound = true;
             }
+            // need to think about what to do here
+            //$fontSchemeClr = $fontSchemeClr ?? $defaultSchemeColor;
+            //if (!empty($fontSchemeClr)) {
+            //    $objText->getFont()->setColor(new Color($fontSrgbClr));
+            //    $fontFound = true;
+            //}
 
             $bold = $bold ?? $defaultBold;
             if ($bold !== null) {
@@ -877,4 +891,56 @@ class Chart
             }
         }
     }
+
+    /**
+     * @param null|Axis $chartObject may be extended to include other types
+     */
+    private function readEffects(SimpleXMLElement $chartDetail, $chartObject): void
+    {
+        if (!isset($chartObject, $chartDetail->spPr)) {
+            return;
+        }
+        $sppr = $chartDetail->spPr->children($this->aNamespace);
+
+        if (isset($sppr->effectLst->glow)) {
+            $axisGlowSize = (float) self::getAttribute($sppr->effectLst->glow, 'rad', 'integer') / Properties::POINTS_WIDTH_MULTIPLIER;
+            if ($axisGlowSize != 0.0) {
+                $srgbClr = $schemeClr = '';
+                $colorArray = $this->readColor($sppr->effectLst->glow, $srgbClr, $schemeClr);
+                $chartObject->setGlowProperties($axisGlowSize, $colorArray['value'], $colorArray['alpha'], $colorArray['type']);
+            }
+        }
+
+        if (isset($sppr->effectLst->softEdge)) {
+            $chartObject->setSoftEdges((float) self::getAttribute($sppr->effectLst->softEdge, 'rad', 'string') / Properties::POINTS_WIDTH_MULTIPLIER);
+        }
+    }
+
+    private function readColor(SimpleXMLElement $colorXml, ?string &$srgbClr, ?string &$schemeClr): array
+    {
+        $result = [
+            'type' => null,
+            'value' => null,
+            'alpha' => null,
+        ];
+        if (isset($colorXml->srgbClr)) {
+            $result['type'] = Properties::EXCEL_COLOR_TYPE_ARGB;
+            $result['value'] = $srgbClr = self::getAttribute($colorXml->srgbClr, 'val', 'string');
+            if (isset($colorXml->srgbClr->alpha)) {
+                $alpha = (int) self::getAttribute($colorXml->srgbClr->alpha, 'val', 'string');
+                $alpha = 100 - (int) ($alpha / 1000);
+                $result['alpha'] = $alpha;
+            }
+        } elseif (isset($colorXml->schemeClr)) {
+            $result['type'] = Properties::EXCEL_COLOR_TYPE_SCHEME;
+            $result['value'] = $schemeClr = self::getAttribute($colorXml->schemeClr, 'val', 'string');
+            if (isset($colorXml->schemeClr->alpha)) {
+                $alpha = (int) self::getAttribute($colorXml->schemeClr->alpha, 'val', 'string');
+                $alpha = 100 - (int) ($alpha / 1000);
+                $result['alpha'] = $alpha;
+            }
+        }
+
+        return $result;
+    }
 }

src/PhpSpreadsheet/Shared/StringHelper.php

@@ -470,7 +470,7 @@ class StringHelper
     /**
      * Get a substring of a UTF-8 encoded string.
      *
-     * @param string $textValue UTF-8 encoded string
+     * @param null|string $textValue UTF-8 encoded string
      * @param int $offset Start offset
      * @param int $length Maximum number of characters in substring
      *
@@ -478,7 +478,7 @@ class StringHelper
      */
     public static function substring($textValue, $offset, $length = 0)
     {
-        return mb_substr($textValue, $offset, $length, 'UTF-8');
+        return mb_substr($textValue ?? '', $offset, $length, 'UTF-8');
     }
 
     /**

src/PhpSpreadsheet/Style/Font.php

@@ -19,7 +19,7 @@ class Font extends Supervisor
     protected $name = 'Calibri';
 
     /**
-     * The following 6 are used only for chart titles, I think.
+     * The following 7 are used only for chart titles, I think.
      *
      *@var string
      */
@@ -39,6 +39,9 @@ class Font extends Supervisor
 
     /** @var string */
     private $uSchemeClr = '';
+
+    /** @var string */
+    private $uSrgbClr = '';
     // end of chart title items
 
     /**
@@ -603,6 +606,30 @@ class Font extends Supervisor
         return $this;
     }
 
+    public function getUSrgbClr(): string
+    {
+        if ($this->isSupervisor) {
+            return $this->getSharedComponent()->getUSrgbClr();
+        }
+
+        return $this->uSrgbClr;
+    }
+
+    public function setUSrgbClr(string $uSrgbClr): self
+    {
+        if (!$this->isSupervisor) {
+            $this->uSrgbClr = $uSrgbClr;
+        } else {
+            // should never be true
+            // @codeCoverageIgnoreStart
+            $styleArray = $this->getStyleArray(['uSrgbClr' => $uSrgbClr]);
+            $this->getActiveSheet()->getStyle($this->getSelectedCells())->applyFromArray($styleArray);
+            // @codeCoverageIgnoreEnd
+        }
+
+        return $this;
+    }
+
     /**
      * Get Underline.
      *
@@ -731,15 +758,18 @@ class Font extends Supervisor
             $this->underline .
             ($this->strikethrough ? 't' : 'f') .
             $this->color->getHashCode() .
-            '*' .
-            $this->latin .
-            '*' .
-            $this->eastAsian .
-            '*' .
-            $this->complexScript .
-            $this->strikeType .
-            $this->uSchemeClr .
-            (string) $this->baseLine .
+            implode(
+                '*',
+                [
+                    $this->latin,
+                    $this->eastAsian,
+                    $this->complexScript,
+                    $this->strikeType,
+                    $this->uSchemeClr,
+                    $this->uSrgbClr,
+                    (string) $this->baseLine,
+                ]
+            ) .
             __CLASS__
         );
     }
@@ -762,6 +792,7 @@ class Font extends Supervisor
         $this->exportArray2($exportedArray, 'superscript', $this->getSuperscript());
         $this->exportArray2($exportedArray, 'underline', $this->getUnderline());
         $this->exportArray2($exportedArray, 'uSchemeClr', $this->getUSchemeClr());
+        $this->exportArray2($exportedArray, 'uSrgbClr', $this->getUSrgbClr());
 
         return $exportedArray;
     }

src/PhpSpreadsheet/Writer/Xlsx/Chart.php

@@ -497,6 +497,27 @@ class Chart extends WriterPart
         $objWriter->writeAttribute('val', $yAxis->getAxisOptionsProperty('axis_labels'));
         $objWriter->endElement();
 
+        $objWriter->startElement('c:spPr');
+        $objWriter->startElement('a:effectLst');
+        if ($yAxis->getGlowProperty('size') !== null) {
+            $objWriter->startElement('a:glow');
+            $objWriter->writeAttribute('rad', $yAxis->getGlowProperty('size'));
+            $objWriter->startElement("a:{$yAxis->getGlowProperty(['color', 'type'])}");
+            $objWriter->writeAttribute('val', (string) $yAxis->getGlowProperty(['color', 'value']));
+            $objWriter->startElement('a:alpha');
+            $objWriter->writeAttribute('val', (string) $yAxis->getGlowProperty(['color', 'alpha']));
+            $objWriter->endElement();
+            $objWriter->endElement();
+            $objWriter->endElement();
+        }
+        if ($yAxis->getSoftEdgesSize() !== null) {
+            $objWriter->startElement('a:softEdge');
+            $objWriter->writeAttribute('rad', $yAxis->getSoftEdgesSize());
+            $objWriter->endElement(); //end softEdge
+        }
+        $objWriter->endElement(); // effectLst
+        $objWriter->endElement(); // spPr
+
         if ($id2 !== '0') {
             $objWriter->startElement('c:crossAx');
             $objWriter->writeAttribute('val', $id2);
@@ -909,9 +930,9 @@ class Chart extends WriterPart
             $objWriter->startElement('a:glow');
             $objWriter->writeAttribute('rad', $xAxis->getGlowProperty('size'));
             $objWriter->startElement("a:{$xAxis->getGlowProperty(['color', 'type'])}");
-            $objWriter->writeAttribute('val', $xAxis->getGlowProperty(['color', 'value']));
+            $objWriter->writeAttribute('val', (string) $xAxis->getGlowProperty(['color', 'value']));
             $objWriter->startElement('a:alpha');
-            $objWriter->writeAttribute('val', $xAxis->getGlowProperty(['color', 'alpha']));
+            $objWriter->writeAttribute('val', (string) $xAxis->getGlowProperty(['color', 'alpha']));
             $objWriter->endElement();
             $objWriter->endElement();
             $objWriter->endElement();

tests/PhpSpreadsheetTests/Chart/AxisGlowTest.php

@@ -0,0 +1,268 @@
+<?php
+
+namespace PhpOffice\PhpSpreadsheetTests\Writer\Xlsx;
+
+use PhpOffice\PhpSpreadsheet\Chart\Chart;
+use PhpOffice\PhpSpreadsheet\Chart\DataSeries;
+use PhpOffice\PhpSpreadsheet\Chart\DataSeriesValues;
+use PhpOffice\PhpSpreadsheet\Chart\Legend as ChartLegend;
+use PhpOffice\PhpSpreadsheet\Chart\PlotArea;
+use PhpOffice\PhpSpreadsheet\Chart\Properties;
+use PhpOffice\PhpSpreadsheet\Chart\Title;
+use PhpOffice\PhpSpreadsheet\Reader\Xlsx as XlsxReader;
+use PhpOffice\PhpSpreadsheet\Spreadsheet;
+use PhpOffice\PhpSpreadsheet\Writer\Xlsx as XlsxWriter;
+use PhpOffice\PhpSpreadsheetTests\Functional\AbstractFunctional;
+
+class AxisGlowTest extends AbstractFunctional
+{
+    public function readCharts(XlsxReader $reader): void
+    {
+        $reader->setIncludeCharts(true);
+    }
+
+    public function writeCharts(XlsxWriter $writer): void
+    {
+        $writer->setIncludeCharts(true);
+    }
+
+    public function testGlowY(): void
+    {
+        $spreadsheet = new Spreadsheet();
+        $worksheet = $spreadsheet->getActiveSheet();
+        $worksheet->fromArray(
+            [
+                ['', 2010, 2011, 2012],
+                ['Q1', 12, 15, 21],
+                ['Q2', 56, 73, 86],
+                ['Q3', 52, 61, 69],
+                ['Q4', 30, 32, 0],
+            ]
+        );
+
+        // 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
+        $dataSeriesLabels = [
+            new DataSeriesValues(DataSeriesValues::DATASERIES_TYPE_STRING, 'Worksheet!$B$1', null, 1), // 2010
+            new DataSeriesValues(DataSeriesValues::DATASERIES_TYPE_STRING, 'Worksheet!$C$1', null, 1), // 2011
+            new DataSeriesValues(DataSeriesValues::DATASERIES_TYPE_STRING, 'Worksheet!$D$1', null, 1), // 2012
+        ];
+        // Set the X-Axis Labels
+        //     Datatype
+        //     Cell reference for data
+        //     Format Code
+        //     Number of datapoints in series
+        //     Data values
+        //     Data Marker
+        $xAxisTickValues = [
+            new DataSeriesValues(DataSeriesValues::DATASERIES_TYPE_STRING, 'Worksheet!$A$2:$A$5', null, 4), // Q1 to Q4
+        ];
+        // 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
+        $dataSeriesValues = [
+            new DataSeriesValues(DataSeriesValues::DATASERIES_TYPE_NUMBER, 'Worksheet!$B$2:$B$5', null, 4),
+            new DataSeriesValues(DataSeriesValues::DATASERIES_TYPE_NUMBER, 'Worksheet!$C$2:$C$5', null, 4),
+            new DataSeriesValues(DataSeriesValues::DATASERIES_TYPE_NUMBER, 'Worksheet!$D$2:$D$5', null, 4),
+        ];
+
+        // Build the dataseries
+        $series = new DataSeries(
+            DataSeries::TYPE_AREACHART, // plotType
+            DataSeries::GROUPING_PERCENT_STACKED, // plotGrouping
+            range(0, count($dataSeriesValues) - 1), // plotOrder
+            $dataSeriesLabels, // plotLabel
+            $xAxisTickValues, // plotCategory
+            $dataSeriesValues          // plotValues
+        );
+
+        // Set the series in the plot area
+        $plotArea = new PlotArea(null, [$series]);
+        // Set the chart legend
+        $legend = new ChartLegend(ChartLegend::POSITION_TOPRIGHT, null, false);
+
+        $title = new Title('Test %age-Stacked Area Chart');
+        $yAxisLabel = new Title('Value ($k)');
+
+        // Create the chart
+        $chart = new Chart(
+            'chart1', // name
+            $title, // title
+            $legend, // legend
+            $plotArea, // plotArea
+            true, // plotVisibleOnly
+            DataSeries::EMPTY_AS_GAP, // displayBlanksAs
+            null, // xAxisLabel
+            $yAxisLabel  // yAxisLabel
+        );
+        $yAxis = $chart->getChartAxisY();
+        $xAxis = $chart->getChartAxisX();
+        $yAxis->setGlowProperties(10, 'FFFF00', 30, Properties::EXCEL_COLOR_TYPE_ARGB);
+        $expectedSize = 127000.0;
+        $expectedGlowColor = [
+            'type' => 'srgbClr',
+            'value' => 'FFFF00',
+            'alpha' => '70000',
+        ];
+        $yAxis->setSoftEdges(2.5);
+        $xAxis->setSoftEdges(5);
+        $expectedSoftEdgesY = '31750';
+        $expectedSoftEdgesX = '63500';
+        self::assertEquals($expectedSize, $yAxis->getGlowProperty('size'));
+        self::assertEquals($expectedGlowColor, $yAxis->getGlowProperty('color'));
+        self::assertEquals($expectedSoftEdgesY, $yAxis->getSoftEdgesSize());
+        self::assertEquals($expectedSoftEdgesX, $xAxis->getSoftEdgesSize());
+
+        // Set the position where the chart should appear in the worksheet
+        $chart->setTopLeftPosition('A7');
+        $chart->setBottomRightPosition('H20');
+
+        // Add the chart to the worksheet
+        $worksheet->addChart($chart);
+
+        /** @var callable */
+        $callableReader = [$this, 'readCharts'];
+        /** @var callable */
+        $callableWriter = [$this, 'writeCharts'];
+        $reloadedSpreadsheet = $this->writeAndReload($spreadsheet, 'Xlsx', $callableReader, $callableWriter);
+        $spreadsheet->disconnectWorksheets();
+
+        $sheet = $reloadedSpreadsheet->getActiveSheet();
+        $charts2 = $sheet->getChartCollection();
+        self::assertCount(1, $charts2);
+        $chart2 = $charts2[0];
+        self::assertNotNull($chart2);
+        $yAxis2 = $chart2->getChartAxisY();
+        self::assertEquals($expectedSize, $yAxis2->getGlowProperty('size'));
+        self::assertEquals($expectedGlowColor, $yAxis2->getGlowProperty('color'));
+        self::assertEquals($expectedSoftEdgesY, $yAxis2->getSoftEdgesSize());
+        $xAxis2 = $chart2->getChartAxisX();
+        self::assertNull($xAxis2->getGlowProperty('size'));
+        $reloadedSpreadsheet->disconnectWorksheets();
+    }
+
+    public function testGlowX(): void
+    {
+        $spreadsheet = new Spreadsheet();
+        $worksheet = $spreadsheet->getActiveSheet();
+        $worksheet->fromArray(
+            [
+                ['', 2010, 2011, 2012],
+                ['Q1', 12, 15, 21],
+                ['Q2', 56, 73, 86],
+                ['Q3', 52, 61, 69],
+                ['Q4', 30, 32, 0],
+            ]
+        );
+
+        // 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
+        $dataSeriesLabels = [
+            new DataSeriesValues(DataSeriesValues::DATASERIES_TYPE_STRING, 'Worksheet!$B$1', null, 1), // 2010
+            new DataSeriesValues(DataSeriesValues::DATASERIES_TYPE_STRING, 'Worksheet!$C$1', null, 1), // 2011
+            new DataSeriesValues(DataSeriesValues::DATASERIES_TYPE_STRING, 'Worksheet!$D$1', null, 1), // 2012
+        ];
+        // Set the X-Axis Labels
+        //     Datatype
+        //     Cell reference for data
+        //     Format Code
+        //     Number of datapoints in series
+        //     Data values
+        //     Data Marker
+        $xAxisTickValues = [
+            new DataSeriesValues(DataSeriesValues::DATASERIES_TYPE_STRING, 'Worksheet!$A$2:$A$5', null, 4), // Q1 to Q4
+        ];
+        // 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
+        $dataSeriesValues = [
+            new DataSeriesValues(DataSeriesValues::DATASERIES_TYPE_NUMBER, 'Worksheet!$B$2:$B$5', null, 4),
+            new DataSeriesValues(DataSeriesValues::DATASERIES_TYPE_NUMBER, 'Worksheet!$C$2:$C$5', null, 4),
+            new DataSeriesValues(DataSeriesValues::DATASERIES_TYPE_NUMBER, 'Worksheet!$D$2:$D$5', null, 4),
+        ];
+
+        // Build the dataseries
+        $series = new DataSeries(
+            DataSeries::TYPE_AREACHART, // plotType
+            DataSeries::GROUPING_PERCENT_STACKED, // plotGrouping
+            range(0, count($dataSeriesValues) - 1), // plotOrder
+            $dataSeriesLabels, // plotLabel
+            $xAxisTickValues, // plotCategory
+            $dataSeriesValues          // plotValues
+        );
+
+        // Set the series in the plot area
+        $plotArea = new PlotArea(null, [$series]);
+        // Set the chart legend
+        $legend = new ChartLegend(ChartLegend::POSITION_TOPRIGHT, null, false);
+
+        $title = new Title('Test %age-Stacked Area Chart');
+        $yAxisLabel = new Title('Value ($k)');
+
+        // Create the chart
+        $chart = new Chart(
+            'chart1', // name
+            $title, // title
+            $legend, // legend
+            $plotArea, // plotArea
+            true, // plotVisibleOnly
+            DataSeries::EMPTY_AS_GAP, // displayBlanksAs
+            null, // xAxisLabel
+            $yAxisLabel  // yAxisLabel
+        );
+        $yAxis = $chart->getChartAxisX(); // deliberate
+        $yAxis->setGlowProperties(20, 'accent1', 20, Properties::EXCEL_COLOR_TYPE_SCHEME);
+        $expectedSize = 254000.0;
+        $expectedGlowColor = [
+            'type' => 'schemeClr',
+            'value' => 'accent1',
+            'alpha' => '80000',
+        ];
+        self::assertEquals($expectedSize, $yAxis->getGlowProperty('size'));
+        self::assertEquals($expectedGlowColor, $yAxis->getGlowProperty('color'));
+
+        // Set the position where the chart should appear in the worksheet
+        $chart->setTopLeftPosition('A7');
+        $chart->setBottomRightPosition('H20');
+
+        // Add the chart to the worksheet
+        $worksheet->addChart($chart);
+
+        /** @var callable */
+        $callableReader = [$this, 'readCharts'];
+        /** @var callable */
+        $callableWriter = [$this, 'writeCharts'];
+        $reloadedSpreadsheet = $this->writeAndReload($spreadsheet, 'Xlsx', $callableReader, $callableWriter);
+        $spreadsheet->disconnectWorksheets();
+
+        $sheet = $reloadedSpreadsheet->getActiveSheet();
+        $charts2 = $sheet->getChartCollection();
+        self::assertCount(1, $charts2);
+        $chart2 = $charts2[0];
+        self::assertNotNull($chart2);
+        $yAxis2 = $chart2->getChartAxisX(); // deliberate
+        self::assertEquals($expectedSize, $yAxis2->getGlowProperty('size'));
+        self::assertEquals($expectedGlowColor, $yAxis2->getGlowProperty('color'));
+        $xAxis2 = $chart2->getChartAxisY(); // deliberate
+        self::assertNull($xAxis2->getGlowProperty('size'));
+        $reloadedSpreadsheet->disconnectWorksheets();
+    }
+}