Merge pull request #845 from knowm/revert-698-pieChartLabelGenerator

Revert "Give the possibility to supply a custom label generator for pie charts"

Author: timmolter

xchart-demo/src/main/java/org/knowm/xchart/demo/charts/pie/PieChart02.java

@@ -1,14 +1,10 @@
 package org.knowm.xchart.demo.charts.pie;
 
 import java.awt.Color;
-import java.util.Collection;
-
 import org.knowm.xchart.PieChart;
 import org.knowm.xchart.PieChartBuilder;
-import org.knowm.xchart.PieSeries;
 import org.knowm.xchart.SwingWrapper;
 import org.knowm.xchart.demo.charts.ExampleChart;
-import org.knowm.xchart.style.LabelGenerator;
 import org.knowm.xchart.style.PieStyler.LabelType;
 
 /**
@@ -20,7 +16,6 @@
  *   <li>Pie Chart
  *   <li>PieChartBuilder
  *   <li>Custom series palette
- *   <li>Custom label type
  *   <li>Value Annotations
  *   <li>Tooltips
  */
@@ -40,13 +35,6 @@ public PieChart getChart() {
     PieChart chart =
         new PieChartBuilder().width(800).height(600).title(getClass().getSimpleName()).build();
 
-    // Series
-    chart.addSeries("Gold", 24);
-    chart.addSeries("Silver", 21);
-    chart.addSeries("Platinum", 39);
-    chart.addSeries("Copper", 17);
-    chart.addSeries("Zinc", 40);
-
     // Customize Chart
     Color[] sliceColors =
         new Color[] {
@@ -57,12 +45,18 @@ public PieChart getChart() {
           new Color(246, 199, 182)
         };
     chart.getStyler().setSeriesColors(sliceColors);
-    chart.getStyler().setLabelType(LabelType.Custom);
-    chart.getStyler().setLabelGenerator(new CustomLabelGenerator(chart.getSeriesMap().values()));
+    chart.getStyler().setLabelType(LabelType.Value);
     // chart.getStyler().setDecimalPattern("#0.000");
     chart.getStyler().setToolTipsEnabled(true);
     //    chart.getStyler().setToolTipsAlwaysVisible(true);
 
+    // Series
+    chart.addSeries("Gold", 24);
+    chart.addSeries("Silver", 21);
+    chart.addSeries("Platinum", 39);
+    chart.addSeries("Copper", 17);
+    chart.addSeries("Zinc", 40);
+
     return chart;
   }
 
@@ -71,21 +65,4 @@ public String getExampleChartName() {
 
     return getClass().getSimpleName() + " - Pie Chart Custom Color Palette";
   }
-
-  private static class CustomLabelGenerator implements LabelGenerator {
-
-    private final double total;
-
-    public CustomLabelGenerator(Collection<PieSeries> values) {
-
-      this.total = values.stream().map(PieSeries::getValue).mapToDouble(Number::doubleValue).sum();
-    }
-
-    @Override
-    public String generateSeriesLabel(PieSeries series) {
-
-      double percent = (series.getValue().doubleValue() / total) * 100;
-      return String.format("%s (%.2f%%)", series.getValue(), percent);
-    }
-  }
 }

xchart/src/main/java/org/knowm/xchart/internal/chartpart/PlotContent_Pie.java

@@ -290,8 +290,6 @@ private void paintLabels(Graphics2D g, Rectangle2D pieBounds, double total, doub
           } else {
             label = series.getName() + " (" + y.toString() + ")";
           }
-        } else if (pieStyler.getLabelType() == LabelType.Custom) {
-          label = pieStyler.getLabelGenerator().generateSeriesLabel(series);
         }
 
         TextLayout textLayout =

xchart/src/main/java/org/knowm/xchart/style/LabelGenerator.java

@@ -25,7 +25,6 @@ public class PieStyler extends Styler {
   private Color labelsFontColor;
   private double labelsDistance;
   private LabelType labelType;
-  private LabelGenerator labelGenerator;
   private boolean isForceAllLabelsVisible;
   private boolean isLabelsFontColorAutomaticEnabled;
   private Color labelsFontColorAutomaticLight;
@@ -143,23 +142,6 @@ public PieStyler setLabelType(LabelType labelType) {
     return this;
   }
 
-  public LabelGenerator getLabelGenerator() {
-
-    return labelGenerator;
-  }
-
-  /**
-   * Sets the Pie custom label generator
-   *
-   * @param labelGenerator
-   */
-  public PieStyler setLabelGenerator(LabelGenerator labelGenerator) {
-
-    this.labelType = LabelType.Custom;
-    this.labelGenerator = labelGenerator;
-    return this;
-  }
-
   public boolean isForceAllLabelsVisible() {
 
     return isForceAllLabelsVisible;
@@ -380,8 +362,7 @@ public enum LabelType {
     Percentage,
     Name,
     NameAndPercentage,
-    NameAndValue,
-    Custom
+    NameAndValue
   }
 
   public enum ClockwiseDirectionType {