allowed for date X-Axis types for real-time plots

xchart-demo/src/main/java/com/xeiam/xchart/demo/charts/realtime/RealtimeChart01.java

@@ -79,7 +79,6 @@ public class RealtimeChart01 implements ExampleChart {
 
   public XChartPanel buildPanel() {
 
-    yData = getRandomData(5);
     return new XChartPanel(getChart());
   }
 

xchart-demo/src/main/java/com/xeiam/xchart/demo/charts/realtime/RealtimeChart02.java

@@ -34,7 +34,6 @@ import com.xeiam.xchart.demo.charts.ExampleChart;
 public class RealtimeChart02 implements ExampleChart {
 
   private Chart chart;
-  // private XChartPanel chartPanel;
   public static final String SERIES_NAME = "series1";
   private List<Integer> xData;
   private List<Double> yData;
@@ -82,9 +81,6 @@ public class RealtimeChart02 implements ExampleChart {
 
   public XChartPanel buildPanel() {
 
-    yData = getRandomData(5);
-    xData = getMonotonicallyIncreasingData(5);
-
     return new XChartPanel(getChart());
   }
 

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

@@ -303,7 +303,7 @@ public class Series {
     return name;
   }
 
-  void replaceXData(List<? extends Number> newXData) {
+  void replaceXData(List<?> newXData) {
 
     xData = newXData;
     calculateMinMax();

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

@@ -249,8 +249,9 @@ public class XChartPanel extends JPanel {
    * 
    * @param seriesName
    * @param newYData
+   * @return
    */
-  public void updateSeries(String seriesName, List<? extends Number> newYData) {
+  public Series updateSeries(String seriesName, List<? extends Number> newYData) {
 
     Series series = chart.getSeriesMap().get(seriesName);
     if (series == null) {
@@ -268,6 +269,8 @@ public class XChartPanel extends JPanel {
     // Re-display the chart
     revalidate();
     repaint();
+    return series;
+
   }
 
   /**
@@ -275,8 +278,9 @@ public class XChartPanel extends JPanel {
    * 
    * @param seriesName
    * @param newYData
+   * @return
    */
-  public void updateSeries(String seriesName, List<? extends Number> newXData, List<? extends Number> newYData) {
+  public Series updateSeries(String seriesName, List<?> newXData, List<? extends Number> newYData) {
 
     Series series = chart.getSeriesMap().get(seriesName);
     if (series == null) {
@@ -288,5 +292,7 @@ public class XChartPanel extends JPanel {
     // Re-display the chart
     revalidate();
     repaint();
+
+    return series;
   }
 }