Use line width for data series when rendering Xlsx

Closes #329

CHANGELOG.md

@@ -11,6 +11,7 @@ and this project adheres to [Semantic Versioning](http://semver.org/).
 
 - Support cell comments in HTML writer and reader - [#308](https://github.com/PHPOffice/PhpSpreadsheet/issues/308)
 - Option to stop at a conditional styling, if it matches (only XLSX format) - [#292](https://github.com/PHPOffice/PhpSpreadsheet/pull/292)
+- Support for line width for data series when rendering Xlsx - [#329](https://github.com/PHPOffice/PhpSpreadsheet/pull/329)
 
 ### Fixed
 

samples/Chart/33_Chart_create_line.php

@@ -57,6 +57,7 @@ $dataSeriesValues = [
     new DataSeriesValues(DataSeriesValues::DATASERIES_TYPE_NUMBER, 'Worksheet!$C$2:$C$5', null, 4),
     new DataSeriesValues(DataSeriesValues::DATASERIES_TYPE_NUMBER, 'Worksheet!$D$2:$D$5', null, 4),
 ];
+$dataSeriesValues[2]->setLineWidth(60000);
 
 //	Build the dataseries
 $series = new DataSeries(

src/PhpSpreadsheet/Chart/DataSeriesValues.php

@@ -66,6 +66,13 @@ class DataSeriesValues
      */
     private $fillColor;
 
+    /**
+     * Line Width.
+     *
+     * @var int
+     */
+    private $lineWidth = 12700;
+
     /**
      * Create a new DataSeriesValues object.
      *
@@ -231,6 +238,31 @@ class DataSeriesValues
         return $this;
     }
 
+    /**
+     * Get line width for series.
+     *
+     * @return int
+     */
+    public function getLineWidth()
+    {
+        return $this->lineWidth;
+    }
+
+    /**
+     * Set line width for the series.
+     *
+     * @param int $width
+     *
+     * @return DataSeriesValues
+     */
+    public function setLineWidth($width)
+    {
+        $minWidth = 12700;
+        $this->lineWidth = max($minWidth, $width);
+
+        return $this;
+    }
+
     /**
      * Identify if the Data Series is a multi-level or a simple series.
      *

src/PhpSpreadsheet/Writer/Xlsx/Chart.php

@@ -1127,11 +1127,19 @@ class Chart extends WriterPart
                 $objWriter->endElement();
             }
 
+            //    Values
+            $plotSeriesValues = $plotGroup->getPlotValuesByIndex($plotSeriesRef);
+
             //    Formatting for the points
             if (($groupType == DataSeries::TYPE_LINECHART) || ($groupType == DataSeries::TYPE_STOCKCHART)) {
+                $plotLineWidth = 12700;
+                if ($plotSeriesValues) {
+                    $plotLineWidth = $plotSeriesValues->getLineWidth();
+                }
+
                 $objWriter->startElement('c:spPr');
                 $objWriter->startElement('a:ln');
-                $objWriter->writeAttribute('w', 12700);
+                $objWriter->writeAttribute('w', $plotLineWidth);
                 if ($groupType == DataSeries::TYPE_STOCKCHART) {
                     $objWriter->startElement('a:noFill');
                     $objWriter->endElement();
@@ -1140,7 +1148,6 @@ class Chart extends WriterPart
                 $objWriter->endElement();
             }
 
-            $plotSeriesValues = $plotGroup->getPlotValuesByIndex($plotSeriesRef);
             if ($plotSeriesValues) {
                 $plotSeriesMarker = $plotSeriesValues->getPointMarker();
                 if ($plotSeriesMarker) {

tests/PhpSpreadsheetTests/Chart/DataSeriesValuesTest.php

@@ -47,4 +47,16 @@ class DataSeriesValuesTest extends TestCase
         $result = $testInstance->getDataType();
         self::assertEquals($dataTypeValue, $result);
     }
+
+    public function testGetLineWidth()
+    {
+        $testInstance = new DataSeriesValues();
+        self::assertEquals(12700, $testInstance->getLineWidth(), 'should have default');
+
+        $testInstance->setLineWidth(40000);
+        self::assertEquals(40000, $testInstance->getLineWidth());
+
+        $testInstance->setLineWidth(1);
+        self::assertEquals(12700, $testInstance->getLineWidth(), 'should enforce minimum width');
+    }
 }