Issue #87 allow error bar color to match series color

xchart/src/main/java/com/xeiam/xchart/StyleManager.java

@@ -143,6 +143,7 @@ public class StyleManager {
 
   // Error Bars ///////////////////////////////
   private Color errorBarsColor;
+  private boolean isErrorBarsColorSeriesColor;
 
   // Formatting ////////////////////////////////
   private Locale locale;
@@ -231,6 +232,7 @@ public class StyleManager {
 
     // Error Bars ///////////////////////////////
     errorBarsColor = theme.getErrorBarsColor();
+    isErrorBarsColorSeriesColor = theme.isErrorBarsColorSeriesColor();
 
     // Formatting ////////////////////////////////
     locale = Locale.getDefault();
@@ -1092,6 +1094,21 @@ public class StyleManager {
     return errorBarsColor;
   }
 
+  /**
+   * Set true if the the error bar color should match the series color
+   *
+   * @return
+   */
+  public void setErrorBarsColorSeriesColor(boolean isErrorBarsColorSeriesColor) {
+
+    this.isErrorBarsColorSeriesColor = isErrorBarsColorSeriesColor;
+  }
+
+  public boolean isErrorBarsColorSeriesColor() {
+
+    return isErrorBarsColorSeriesColor;
+  }
+
   // Formatting ////////////////////////////////
 
   /**

xchart/src/main/java/com/xeiam/xchart/internal/chartpart/PlotContentLineChart.java

@@ -236,7 +236,14 @@ public class PlotContentLineChart extends PlotContent {
 
         if (errorBars != null) {
 
+          // set error bar color
+
+          if (getChartPainter().getStyleManager().isErrorBarsColorSeriesColor()) {
+            g.setColor(series.getStrokeColor());
+          }
+          else {
             g.setColor(getChartPainter().getStyleManager().getErrorBarsColor());
+          }
           g.setStroke(errorBarStroke);
 
           double topValue = 0.0;

xchart/src/main/java/com/xeiam/xchart/internal/style/GGPlot2Theme.java

@@ -315,4 +315,9 @@ public class GGPlot2Theme implements Theme {
     return ChartColor.getAWTColor(ChartColor.DARK_GREY);
   }
 
+  @Override
+  public boolean isErrorBarsColorSeriesColor() {
+
+    return false;
+  }
 }

xchart/src/main/java/com/xeiam/xchart/internal/style/MatlabTheme.java

@@ -316,4 +316,9 @@ public class MatlabTheme implements Theme {
     return ChartColor.getAWTColor(ChartColor.BLACK);
   }
 
+  @Override
+  public boolean isErrorBarsColorSeriesColor() {
+
+    return false;
+  }
 }

xchart/src/main/java/com/xeiam/xchart/internal/style/Theme.java

@@ -132,4 +132,6 @@ public interface Theme {
 
   public Color getErrorBarsColor();
 
+  public boolean isErrorBarsColorSeriesColor();
+
 }

xchart/src/main/java/com/xeiam/xchart/internal/style/XChartTheme.java

@@ -315,4 +315,10 @@ public class XChartTheme implements Theme {
     return ChartColor.getAWTColor(ChartColor.DARK_GREY);
   }
 
+  @Override
+  public boolean isErrorBarsColorSeriesColor() {
+
+    return false;
+  }
+
 }