chart - Add dynamic Legend positions (#1)

* Writer/Part/chart.php - Add dynamic Legend positions

The position of the legend of charts was always fixed to the right. Adding in the option to set it dynamically via a new option under styles/chart

* Update Styles/Chart.php

Add in the public functions to getStyle() to get and set the legend position

src/PhpWord/Style/Chart.php

@@ -66,6 +66,13 @@ class Chart extends AbstractStyle
      */
     private $showLegend = false;
 
+    /**
+     * Chart legend Position. 
+     *
+     * @var string
+     */
+    private $legendPosition = 'r';
+
     /**
      * A list of display options for data labels
      *
@@ -285,6 +292,34 @@ class Chart extends AbstractStyle
         return $this;
     }
 
+    /**
+     * Get chart legend position
+     *
+     * @return string
+     */
+    public function getLegendPosition()
+    {
+        return $this->legendPosition;
+    }
+
+    /**
+     * Set chart legend position. choices:
+     * "r" - right of chart
+     * "b" - bottom of chart
+     * "t" - top of chart
+     * "l" - left of chart
+     *
+     * default: right
+     *
+     * @param bool $value
+     */
+    public function setLegendPosition($value = 'r')
+    {
+        $this->legendPosition = $value;
+
+        return $this;
+    }
+
     /*
      * Show labels for axis
      *

src/PhpWord/Writer/Word2007/Part/Chart.php

@@ -131,6 +131,7 @@ class Chart extends AbstractPart
 
         $title = $style->getTitle();
         $showLegend = $style->isShowLegend();
+        $legendPosition = $style->getLegendPosition();
 
         //Chart title
         if ($title) {
@@ -154,7 +155,7 @@ class Chart extends AbstractPart
 
         //Chart legend
         if ($showLegend) {
-            $xmlWriter->writeRaw('<c:legend><c:legendPos val="r"/></c:legend>');
+            $xmlWriter->writeRaw('<c:legend><c:legendPos val="'.$legendPosition.'"/></c:legend>');
         }
 
         $xmlWriter->startElement('c:plotArea');