Step Graph show y axis labels

[calypso]

I want to show some data using a step graph. The data on the Y axis always seems to include zero, even the values are far away from zero.

Therefore I want to remove zero from the auto range using "yAxis.setAutoRangeIncludesZero(false)", but every time I do this the y axis labels disappear.

I can solve this by manually entering the range/tick unit/ and number format but really I want it to all be auto tuned for me? Can I do this?

Code: Select all

package damofx.statservergui.gui.components;

import java.awt.Color;
import java.text.DateFormat;
import java.text.DecimalFormat;
import java.text.NumberFormat;
import java.text.SimpleDateFormat;

import javax.swing.JFrame;

import org.jfree.chart.ChartFactory;
import org.jfree.chart.ChartPanel;
import org.jfree.chart.JFreeChart;
import org.jfree.chart.axis.DateAxis;
import org.jfree.chart.axis.NumberAxis;
import org.jfree.chart.axis.NumberTickUnit;
import org.jfree.chart.plot.Marker;
import org.jfree.chart.plot.PlotOrientation;
import org.jfree.chart.plot.XYPlot;
import org.jfree.data.Range;
import org.jfree.data.xy.XYDataset;
import org.jfree.data.xy.XYSeries;
import org.jfree.data.xy.XYSeriesCollection;
import org.jfree.ui.RectangleInsets;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * This class uses JFreeGraph to create Graph Panels for displaying TimeSeries
 * data
 * 
 * @author chris.jones
 * 
 */
public class StepGraph {
    private static final Logger LOG = LoggerFactory.getLogger(StepGraph.class);

    private final ChartPanel chartPanel;
    private final String title;

    private final boolean includeLegend;
    private final DateFormat dateFormat;
    private final JFreeChart chart;

    private XYSeriesCollection dataset;

    public StepGraph(String title, DateFormat dateFormat, boolean includeLegend) {
        this.title = title;
        this.includeLegend = includeLegend;
        this.dateFormat = dateFormat;
        this.dataset = new XYSeriesCollection();

        chart = createChart(dataset, title);
        chartPanel = new ChartPanel(chart);
        chartPanel.setPreferredSize(new java.awt.Dimension(500, 270));
    }

    private JFreeChart createChart(final XYDataset dataset, String xAxisTitle) {

        JFreeChart chart = ChartFactory.createXYStepChart(null, // chart title
                xAxisTitle, // x axis label
                null, // y axis label
                dataset, // data
                PlotOrientation.VERTICAL, includeLegend, // include legend
                true, // tooltips
                false // urls
                );

        chart.setBackgroundPaint(Color.LIGHT_GRAY);
        // chart.setPadding(new RectangleInsets(0, 0, 0, 0));
        final XYPlot plot = chart.getXYPlot();
        plot.setBackgroundPaint(Color.WHITE);
        plot.setDomainGridlinePaint(Color.LIGHT_GRAY);
        plot.setRangeGridlinePaint(Color.LIGHT_GRAY);

        NumberAxis yAxis = (NumberAxis) plot.getRangeAxis();
        
        //This will remove range axis labels
//        yAxis.setAutoRangeIncludesZero(false);
        
        //This will solve the problem manually, but I want jgraph to auto calculate  range and tick unit
//        yAxis.setRange(105.9029, 105.9051);
//        yAxis.setTickUnit(new NumberTickUnit(0.001));
//        yAxis.setNumberFormatOverride(new DecimalFormat("#.0000"));

        plot.getRangeAxis().setLabelInsets(new RectangleInsets(0, 0, 0, 0));
        final DateAxis dateaxis = (DateAxis) plot.getDomainAxis();
        dateaxis.setDateFormatOverride(dateFormat);
        dateaxis.setLabelInsets(new RectangleInsets(0, 0, 0, 0));
        return chart;
    }

    public void addTimeSeries(XYSeries series) {
        dataset.addSeries(series);
        chartPanel.setChart(createChart(dataset, title));
        chartPanel.repaint();
    }

    public ChartPanel getChart() {
        return chartPanel;
    }

    public static void main(String[] args) {

        XYSeries t2 = new XYSeries("2");

        t2.add(29540604, 105.904);
        t2.add(29540904, 105.903);
        t2.add(29541404, 105.903);
        t2.add(29541504, 105.904);
        t2.add(29550308, 105.904);
        t2.add(29562505, 105.904);
        t2.add(29564717, 105.905);
        t2.add(29564809, 105.905);

        StepGraph graph = new StepGraph("Blah", new SimpleDateFormat("HH:mm"),
                true);
        graph.addTimeSeries(t2);
        JFrame frame = new JFrame("Test");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.add(graph.getChart());
        frame.pack();
        frame.setVisible(true);
    }

}