added test class for issue #72

xchart-demo/src/main/java/com/xeiam/xchart/standalone/DateChart.java

+/**
+ * Copyright 2013 Xeiam LLC.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package com.xeiam.xchart.standalone;
+
+import java.text.DateFormat;
+import java.text.ParseException;
+import java.text.SimpleDateFormat;
+import java.util.ArrayList;
+import java.util.Date;
+import java.util.List;
+import java.util.Random;
+
+import com.xeiam.xchart.Chart;
+import com.xeiam.xchart.ChartBuilder;
+import com.xeiam.xchart.SwingWrapper;
+import com.xeiam.xchart.demo.charts.ExampleChart;
+
+/**
+ * @author timmolter
+ */
+public class DateChart implements ExampleChart {
+
+  public static void main(String[] args) {
+
+    ExampleChart exampleChart = new DateChart();
+    Chart chart = exampleChart.getChart();
+    new SwingWrapper(chart).displayChart();
+  }
+
+  @Override
+  public Chart getChart() {
+
+    // Create Chart
+    Chart chart = new ChartBuilder().width(800).height(600).title("Day Scale").build();
+    chart.getStyleManager().setLegendVisible(false);
+
+    // generate data
+    List<Date> xData = new ArrayList<Date>();
+    List<Double> yData = new ArrayList<Double>();
+
+    Random random = new Random();
+
+    DateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
+    Date date = null;
+    for (int i = 1; i <= 5; i++) {
+      try {
+        date = sdf.parse("2014-02-" + i);
+      } catch (ParseException e) {
+        e.printStackTrace();
+      }
+      System.out.println(date);
+      xData.add(date);
+      System.out.println(date.getTime());
+      yData.add(Math.random() * i);
+    }
+
+    chart.addSeries("blah", xData, yData);
+
+    return chart;
+
+  }
+}

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

@@ -107,9 +107,12 @@ public class AxisTickLabels implements ChartPart {
       double xOffset = axisTick.getAxis().getPaintZone().getX();
       double yOffset = axisTick.getAxis().getAxisTitle().getBounds().getY();
       double maxTickLabelHeight = 0;
+
+      // System.out.println("axisTick.getTickLabels().size(): " + axisTick.getTickLabels().size());
       for (int i = 0; i < axisTick.getTickLabels().size(); i++) {
 
         String tickLabel = axisTick.getTickLabels().get(i);
+        // System.out.println("tickLabel: " + tickLabel);
         double tickLocation = axisTick.getTickLocations().get(i);
 
         if (tickLabel != null) { // some are null for logarithmic axes