Java/Chart/Compass Chart

JFreeChart: Compass Demo

/* ===========================================================
 * JFreeChart : a free chart library for the Java(tm) platform
 * ===========================================================
 *
 * (C) Copyright 2000-2004, by Object Refinery Limited and Contributors.
 *
 * Project Info:  http://www.jfree.org/jfreechart/index.html
 *
 * This library is free software; you can redistribute it and/or modify it under the terms
 * of the GNU Lesser General Public License as published by the Free Software Foundation;
 * either version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
 * without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 * See the GNU Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License along with this
 * library; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
 * Boston, MA 02111-1307, USA.
 *
 * [Java is a trademark or registered trademark of Sun Microsystems, Inc.
 * in the United States and other countries.]
 *
 * ----------------
 * CompassDemo.java
 * ----------------
 * (C) Copyright 2002-2004, by the Australian Antarctic Division and Contributors.
 *
 * Original Author:  Bryan Scott (for the Australian Antarctic Division);
 * Contributor(s):   David Gilbert (for Object Refinery Limited);
 *
 * $Id: CompassDemo.java,v 1.15 2004/04/26 19:11:53 taqua Exp $
 *
 * Changes
 * -------
 * 25-Sep-2002 : Version 1, contributed by Bryan Scott (DG);
 * 10-Oct-2002 : Fixed errors reported by Checkstyle (DG);
 * 27-Mar-2003 : Changed dataset to ValueDataset (DG);
 * 16-Mar-2004 : Fixed null data display issue (BRS);
 *
 */
package org.jfree.chart.demo;
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import java.awt.GridLayout;
import java.awt.Insets;
import java.awt.Toolkit;
import java.awt.event.ActionEvent;
import java.beans.PropertyChangeEvent;
import java.beans.PropertyChangeListener;
import javax.swing.JCheckBox;
import javax.swing.JComboBox;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.SwingConstants;
import javax.swing.border.TitledBorder;
import org.jfree.chart.ChartPanel;
import org.jfree.chart.JFreeChart;
import org.jfree.chart.plot.rupassPlot;
import org.jfree.data.general.DefaultValueDataset;
import org.jfree.ui.Spinner;
/**
 * A demo application showing how to use the {@link CompassPlot} class.
 *
 * @author Bryan Scott
 */
public class CompassDemo extends JPanel {
    /** Whether to output messages to the console **/
    public static final boolean DEBUG = true;
    /** The available needle types. */
    public static final String[] NEEDLE_TYPES
        = {"Arrow", "Line", "Long", "Pin", "Plum", "Pointer", "Ship", "Wind", "Arrow"};
    /** Dataset 1. */
    private DefaultValueDataset compassData = new DefaultValueDataset(new Double(0.0));
    /** Dataset 2. */
    private DefaultValueDataset shipData = new DefaultValueDataset(new Double(0.0));
    /** The compass plot. */
    private CompassPlot compassPlot = new CompassPlot(this.rupassData);
    /** The chart. */
    private JFreeChart compassChart = new JFreeChart("Compass Test",
                                                     JFreeChart.DEFAULT_TITLE_FONT,
                                                     this.rupassPlot, false);
    /** The chart panel. */
    private ChartPanel panelCompass = new ChartPanel(this.rupassChart);
    /** A grid layout. */
    private GridLayout gridLayout1 = new GridLayout();
    /** A panel. */
    private JPanel panelCompassHolder = new JPanel();
    /** A border layout. */
    private BorderLayout borderLayout = new BorderLayout();
    /** A panel. */
    private JPanel jPanel12 = new JPanel();
    /** A checkbox. */
    private JCheckBox windNullCheckBox = new JCheckBox();
    /** A checkbox. */
    private JCheckBox shipNullCheckBox = new JCheckBox();
    // SpinnerNumberModel modelWind = new SpinnerNumberModel(0, -1, 361, 1);
    // SpinnerNumberModel modelShip = new SpinnerNumberModel(0, -1, 361, 1);
    // JSpinner spinWind = new JSpinner(modelWind);
    // JSpinner spinShip = new JSpinner(modelShip);
    /** The wind spinner control. */
    private Spinner spinWind = new Spinner(270);
    /** The ship spinner control. */
    private Spinner spinShip = new Spinner(45);
    /** A panel. */
    private JPanel jPanel1 = new JPanel();
    /** A combo box. */
    private JComboBox pick1Pointer = new JComboBox(NEEDLE_TYPES);
    /** A panel. */
    private JPanel jPanel2 = new JPanel();
    /** A combo box. */
    private JComboBox pick2Pointer = new JComboBox(NEEDLE_TYPES);
    /** A titled border. */
    private TitledBorder titledBorder1;
    /** A titled border. */
    private TitledBorder titledBorder2;
    /** A grid bag layout. */
    private GridBagLayout gridBagLayout1 = new GridBagLayout();
    /** A grid bag layout. */
    private GridBagLayout gridBagLayout2 = new GridBagLayout();
    /** A titled border. */
    private TitledBorder titledBorder3;
    /** A grid layout. */
    private GridLayout gridLayout2 = new GridLayout();
    /**
     * Default constructor.
     */
    public CompassDemo() {
        try {
            //this.rupassPlot.addData(this.rupassData);
            this.rupassPlot.addData(this.shipData);
            this.rupassPlot.setSeriesNeedle(0, 7);
            this.rupassPlot.setSeriesNeedle(1, 5);
            this.rupassPlot.setSeriesPaint(0, Color.blue);
            this.rupassPlot.setSeriesOutlinePaint(0, Color.blue);
            this.rupassPlot.setSeriesPaint(1, Color.red);
            this.rupassPlot.setSeriesOutlinePaint(1, Color.red);
            this.pick1Pointer.setSelectedIndex(7);
            this.pick2Pointer.setSelectedIndex(5);
            jbInit();
        }
        catch (Exception ex) {
            ex.printStackTrace();
        }
    }
    /**
     * Initialises the user interface.
     *
     * @throws Exception if there are any exceptions.
     */
    void jbInit() throws Exception {
        this.titledBorder1 = new TitledBorder("");
        this.titledBorder2 = new TitledBorder("");
        this.titledBorder3 = new TitledBorder("");
        setLayout(this.gridLayout1);
        this.panelCompassHolder.setLayout(this.borderLayout);
        this.windNullCheckBox.setHorizontalTextPosition(SwingConstants.LEADING);
        this.windNullCheckBox.setText("Null");
        this.windNullCheckBox.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(final ActionEvent e) {
                checkWindNullActionPerformed(e);
            }
        });
        this.shipNullCheckBox.setHorizontalTextPosition(SwingConstants.LEFT);
        this.shipNullCheckBox.setText("Null");
        this.shipNullCheckBox.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(final ActionEvent e) {
                checkShipNullActionPerformed(e);
            }
        });
        this.spinShip.addPropertyChangeListener(new PropertyChangeListener() {
            public void propertyChange(final PropertyChangeEvent evt) {
              if (DEBUG) {
                System.out.println("compassDemo:spinShipPropertyChange");
              }
              final Spinner spinner = (Spinner) evt.getSource();
              if (spinner.isEnabled()) {
                shipData.setValue(new Double(spinner.getValue()));
              }
            }
        });
        this.spinWind.addPropertyChangeListener(new PropertyChangeListener() {
            public void propertyChange(final PropertyChangeEvent evt) {
                if (DEBUG) {
                  System.out.println("compassDemo:spinWindPropertyChange");
                }  
                final Spinner spinner = (Spinner) evt.getSource();
                if (spinner.isEnabled()) {
                  compassData.setValue(new Double(spinner.getValue()));
                }
            }
        });
        this.jPanel12.setLayout(this.gridLayout2);
        this.jPanel2.setBorder(this.titledBorder1);
        this.jPanel2.setLayout(this.gridBagLayout2);
        this.jPanel1.setBorder(this.titledBorder2);
        this.jPanel1.setLayout(this.gridBagLayout1);
        this.titledBorder1.setTitle("Second Pointer");
        this.titledBorder2.setTitle("First Pointer");
        this.titledBorder3.setTitle("Plot Options");
        this.pick2Pointer.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(final ActionEvent e) {
                pick2PointerActionPerformed(e);
            }
        });
        this.pick1Pointer.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(final ActionEvent e) {
                pick1PointerActionPerformed(e);
            }
        });
        add(this.panelCompassHolder, null);
        this.panelCompassHolder.add(this.jPanel12, BorderLayout.SOUTH);
        this.jPanel12.add(this.jPanel1, null);
        this.jPanel1.add(this.pick1Pointer,
                    new GridBagConstraints(0, 0, 1, 1, 1.0, 0.0,
                                           GridBagConstraints.CENTER,
                                           GridBagConstraints.HORIZONTAL,
                                           new Insets(0, 0, 0, 0),
                                           0, 0));
        this.jPanel1.add(this.windNullCheckBox,
                    new GridBagConstraints(1, 0, 1, 1, 0.0, 0.0,
                                           GridBagConstraints.CENTER,
                                           GridBagConstraints.NONE,
                                           new Insets(0, 0, 0, 0),
                                           0, 0));
        this.jPanel1.add(this.spinWind,
                    new GridBagConstraints(2, 0, 1, 1, 1.0, 0.0,
                                           GridBagConstraints.CENTER,
                                           GridBagConstraints.BOTH,
                                           new Insets(0, 0, 0, 0),
                                           0, 0));
        this.jPanel12.add(this.jPanel2, null);
        this.jPanel2.add(this.pick2Pointer,
                    new GridBagConstraints(0, 0, 1, 1, 1.0, 0.0,
                                           GridBagConstraints.CENTER,
                                           GridBagConstraints.HORIZONTAL,
                                           new Insets(0, 0, 0, 0),
                                           0, 0));
        this.jPanel2.add(this.shipNullCheckBox,
                    new GridBagConstraints(1, 0, 1, 1, 0.0, 0.0,
                                           GridBagConstraints.CENTER,
                                           GridBagConstraints.NONE,
                                           new Insets(0, 0, 0, 0),
                                           0, 0));
        this.jPanel2.add(this.spinShip,
                    new GridBagConstraints(2, 0, 1, 1, 1.0, 0.0,
                    GridBagConstraints.CENTER,
                    GridBagConstraints.BOTH,
                    new Insets(0, 0, 0, 0),
                    0, 0));
        this.panelCompassHolder.add(this.panelCompass, BorderLayout.CENTER);
    }
    /**
     * Entry point for the demo application.
     *
     * @param args  ignored.
     */
    public static void main(final String[] args) {
        final CompassDemo panel = new CompassDemo();
        final JFrame frame = new JFrame();
        frame.getContentPane().setLayout(new BorderLayout(5, 5));
        frame.setDefaultCloseOperation(3);
        frame.setTitle("Compass Demo");
        frame.getContentPane().add(panel, BorderLayout.CENTER);
        frame.setSize(700, 400);
        final Dimension d = Toolkit.getDefaultToolkit().getScreenSize();
        frame.setLocation((d.width - frame.getSize().width) / 2,
                          (d.height - frame.getSize().height) / 2);
        frame.setVisible(true);
    }
    // ****************************************************************************
    // * JFREECHART DEVELOPER GUIDE                                               *
    // * The JFreeChart Developer Guide, written by David Gilbert, is available   *
    // * to purchase from Object Refinery Limited:                                *
    // *                                                                          *
    // * http://www.object-refinery.ru/jfreechart/guide.html                     *
    // *                                                                          *
    // * Sales are used to provide funding for the JFreeChart project - please    *
    // * support us so that we can continue developing free software.             *
    // ****************************************************************************
    /**
     * Updates the data.
     *
     * @param value  the value.
     */
    public void adjustData(final double value) {
        final Number val = this.rupassData.getValue();
        double newVal = value;
        if (val != null) {
            newVal += val.doubleValue();
        }
        if (newVal > 360) {
            newVal = 0;
        }
        if (newVal < 0) {
            newVal = 360;
        }
        this.rupassData.setValue(new Double(newVal));
    }
    /**
     * Handles an action event.
     *
     * @param e  the event.
     */
    void checkWindNullActionPerformed(final ActionEvent e) {
        if (CompassDemo.DEBUG) {
            System.out.println("CompassDemo:checkWindNull: " + this.windNullCheckBox.isSelected());
        }
        if (this.windNullCheckBox.isSelected()) {
            this.rupassData.setValue(null);
            this.spinWind.setEnabled(false);
        }
        else {
            //  compassData.setValue((new Double(((Integer)spinWind.getValue()).intValue())));
            this.rupassData.setValue(new Double(this.spinWind.getValue()));
            this.spinWind.setEnabled(true);
        }
        if (CompassDemo.DEBUG) {
          System.out.println("CompassDemo:checkWindNull: " + this.rupassData.getValue());
        }
          
    }
    /**
     * Handles an action event.
     *
     * @param e  the event.
     */
    void checkShipNullActionPerformed(final ActionEvent e) {
        if (CompassDemo.DEBUG) {
            System.out.println("CompassDemo:checkShipNull: " + this.shipNullCheckBox.isSelected());
        }
        if (this.shipNullCheckBox.isSelected()) {
            this.shipData.setValue(null);
            this.spinShip.setEnabled(false);
        }
        else {
           // shipData.setValue((new Double(((Integer)spinShip.getValue()).intValue())));
            this.shipData.setValue(new Double(this.spinShip.getValue()));
            this.spinShip.setEnabled(true);
        }
    }
    /**
     * Handles an action event.
     *
     * @param e  the event.
     */
    void pick2PointerActionPerformed(final ActionEvent e) {
      if (CompassDemo.DEBUG) {
        System.out.println("compassDemo:pick2PointActionPerformed " + e.getActionCommand() + ",");
      }
      this.rupassPlot.setSeriesNeedle(1, this.pick2Pointer.getSelectedIndex());
      this.rupassPlot.setSeriesPaint(1, Color.red);
      this.rupassPlot.setSeriesOutlinePaint(1, Color.red);
    }
    /**
     * Handles an action event.
     *
     * @param e  the event.
     */
    void pick1PointerActionPerformed(final ActionEvent e) {
        if (CompassDemo.DEBUG) {
          System.out.println("compassDemo:pick1PointActionPerformed " + e.getActionCommand() + ",");
        }
        
        this.rupassPlot.setSeriesNeedle(0, this.pick1Pointer.getSelectedIndex());
        this.rupassPlot.setSeriesPaint(0, Color.blue);
        this.rupassPlot.setSeriesOutlinePaint(0, Color.blue);
    }
}

JFreeChart: Compass Demo 2

/* ===========================================================
 * JFreeChart : a free chart library for the Java(tm) platform
 * ===========================================================
 *
 * (C) Copyright 2000-2004, by Object Refinery Limited and Contributors.
 *
 * Project Info:  http://www.jfree.org/jfreechart/index.html
 *
 * This library is free software; you can redistribute it and/or modify it under the terms
 * of the GNU Lesser General Public License as published by the Free Software Foundation;
 * either version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
 * without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 * See the GNU Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License along with this
 * library; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
 * Boston, MA 02111-1307, USA.
 *
 * [Java is a trademark or registered trademark of Sun Microsystems, Inc. 
 * in the United States and other countries.]
 *
 * -----------------
 * CompassDemo2.java
 * -----------------
 * (C) Copyright 2002-2004, by Object Refinery Limited and Contributors.
 *
 * Original Author:  David Gilbert (for Object Refinery Limited);
 * Contributor(s):   -;
 *
 * $Id: CompassDemo2.java,v 1.7 2004/04/26 19:11:53 taqua Exp $
 *
 * Changes
 * -------
 * 04-Aug-2003 : Version 1 (DG);
 *
 */
package org.jfree.chart.demo;
import java.awt.Color;
import org.jfree.chart.ChartPanel;
import org.jfree.chart.JFreeChart;
import org.jfree.chart.plot.rupassPlot;
import org.jfree.data.general.DefaultValueDataset;
import org.jfree.data.general.ValueDataset;
import org.jfree.ui.ApplicationFrame;
import org.jfree.ui.RefineryUtilities;
/**
 * A simple demonstration application showing how to...
 *
 */
public class CompassDemo2 extends ApplicationFrame {
    /**
     * Creates a new demo application.
     *
     * @param title  the frame title.
     */
    public CompassDemo2(final String title) {
        super(title);
        final ValueDataset dataset = new DefaultValueDataset(new Double(45.0));
        final JFreeChart chart = createChart(dataset);
        
        // add the chart to a panel...
        final ChartPanel chartPanel = new ChartPanel(chart);
        chartPanel.setPreferredSize(new java.awt.Dimension(500, 270));
        chartPanel.setEnforceFileExtensions(false);
        setContentPane(chartPanel);
    }
    /**
     * Creates a chart.
     * 
     * @param dataset  the dataset.
     * 
     * @return The chart.
     */
    private JFreeChart createChart(final ValueDataset dataset) {
        
        final CompassPlot plot = new CompassPlot(dataset);
        plot.setSeriesNeedle(7);
        plot.setSeriesPaint(0, Color.red);
        plot.setSeriesOutlinePaint(0, Color.red);
        final JFreeChart chart = new JFreeChart(plot);
        return chart;
        
    }
    
    // ****************************************************************************
    // * JFREECHART DEVELOPER GUIDE                                               *
    // * The JFreeChart Developer Guide, written by David Gilbert, is available   *
    // * to purchase from Object Refinery Limited:                                *
    // *                                                                          *
    // * http://www.object-refinery.ru/jfreechart/guide.html                     *
    // *                                                                          *
    // * Sales are used to provide funding for the JFreeChart project - please    * 
    // * support us so that we can continue developing free software.             *
    // ****************************************************************************
    
    /**
     * Starting point for the demonstration application.
     *
     * @param args  ignored.
     */
    public static void main(final String[] args) {
        final CompassDemo2 demo = new CompassDemo2("Compass Demo 2");
        demo.pack();
        RefineryUtilities.centerFrameOnScreen(demo);
        demo.setVisible(true);
    }
}

JFreeChart: Compass Format Demo

/* ===========================================================
 * JFreeChart : a free chart library for the Java(tm) platform
 * ===========================================================
 *
 * (C) Copyright 2000-2004, by Object Refinery Limited and Contributors.
 *
 * Project Info:  http://www.jfree.org/jfreechart/index.html
 *
 * This library is free software; you can redistribute it and/or modify it under the terms
 * of the GNU Lesser General Public License as published by the Free Software Foundation;
 * either version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
 * without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 * See the GNU Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License along with this
 * library; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
 * Boston, MA 02111-1307, USA.
 *
 * [Java is a trademark or registered trademark of Sun Microsystems, Inc. 
 * in the United States and other countries.]
 *
 * ----------------------
 * CompassFormatDemo.java
 * ----------------------
 * (C) Copyright 2004, by Object Refinery Limited and Contributors.
 *
 * Original Author:  David Gilbert (for Object Refinery Limited);
 * Contributor(s):   -;
 *
 * $Id: CompassFormatDemo.java,v 1.4 2004/04/27 14:53:09 mungady Exp $
 *
 * Changes
 * -------
 * 18-Feb-2004 : Version 1 (DG);
 *
 */
package org.jfree.chart.demo;
import java.awt.Color;
import org.jfree.chart.ChartFactory;
import org.jfree.chart.ChartPanel;
import org.jfree.chart.JFreeChart;
import org.jfree.chart.axis.rupassFormat;
import org.jfree.chart.axis.NumberAxis;
import org.jfree.chart.axis.NumberTickUnit;
import org.jfree.chart.axis.TickUnits;
import org.jfree.chart.axis.ValueAxis;
import org.jfree.chart.plot.XYPlot;
import org.jfree.chart.renderer.xy.XYAreaRenderer;
import org.jfree.chart.renderer.xy.XYItemRenderer;
import org.jfree.data.time.Minute;
import org.jfree.data.time.RegularTimePeriod;
import org.jfree.data.time.TimeSeries;
import org.jfree.data.time.TimeSeriesCollection;
import org.jfree.data.xy.XYDataset;
import org.jfree.ui.ApplicationFrame;
import org.jfree.ui.RefineryUtilities;
/**
 * A demo of the {@link CompassFormat} class.
 *
 */
public class CompassFormatDemo extends ApplicationFrame {
    /**
     * Creates a new demo instance.
     *
     * @param title  the frame title.
     */
    public CompassFormatDemo(final String title) {
        super(title);
        final JFreeChart chart = createChart();
        final ChartPanel chartPanel = new ChartPanel(chart);
        chartPanel.setPreferredSize(new java.awt.Dimension(500, 270));
        setContentPane(chartPanel);
    }
    // ****************************************************************************
    // * JFREECHART DEVELOPER GUIDE                                               *
    // * The JFreeChart Developer Guide, written by David Gilbert, is available   *
    // * to purchase from Object Refinery Limited:                                *
    // *                                                                          *
    // * http://www.object-refinery.ru/jfreechart/guide.html                     *
    // *                                                                          *
    // * Sales are used to provide funding for the JFreeChart project - please    * 
    // * support us so that we can continue developing free software.             *
    // ****************************************************************************
    
    /**
     * Creates a sample dataset.
     *
     * @param count  the item count.
     * 
     * @return the dataset.
     */
    private XYDataset createDirectionDataset(final int count) {
        final TimeSeriesCollection dataset = new TimeSeriesCollection();
        final TimeSeries s1 = new TimeSeries("Wind Direction", Minute.class);
        RegularTimePeriod start = new Minute();
        double direction = 180.0;
        for (int i = 0; i < count; i++) {
            s1.add(start, direction);
            start = start.next();
            direction = direction + (Math.random() - 0.5) * 15.0;
            if (direction < 0.0) {
                direction = direction + 360.0;
            }
            else if (direction > 360.0) {
                direction = direction - 360.0;
            }
        }
        dataset.addSeries(s1);
        return dataset;
    }
    /**
     * Creates a sample dataset.
     *
     * @param count  the item count.
     * 
     * @return the dataset.
     */
    private XYDataset createForceDataset(final int count) {
        final TimeSeriesCollection dataset = new TimeSeriesCollection();
        final TimeSeries s1 = new TimeSeries("Wind Force", Minute.class);
        RegularTimePeriod start = new Minute();
        double force = 3.0;
        for (int i = 0; i < count; i++) {
            s1.add(start, force);
            start = start.next();
            force = Math.max(0.5, force + (Math.random() - 0.5) * 0.5);
        }
        dataset.addSeries(s1);
        return dataset;
    }
    /**
     * Creates a sample chart.
     * 
     * @return a sample chart.
     */
    private JFreeChart createChart() {
        final XYDataset direction = createDirectionDataset(600);
        final JFreeChart chart = ChartFactory.createTimeSeriesChart(
            "Time", 
            "Date", 
            "Direction",
            direction,
            true,
            true,
            false
        );
        final XYPlot plot = chart.getXYPlot();
        plot.getDomainAxis().setLowerMargin(0.0);
        plot.getDomainAxis().setUpperMargin(0.0);
        
        // configure the range axis to display directions...
        final NumberAxis rangeAxis = (NumberAxis) plot.getRangeAxis();
        rangeAxis.setAutoRangeIncludesZero(false);
        final TickUnits units = new TickUnits();
        units.add(new NumberTickUnit(180.0, new CompassFormat()));
        units.add(new NumberTickUnit(90.0, new CompassFormat()));
        units.add(new NumberTickUnit(45.0, new CompassFormat()));
        units.add(new NumberTickUnit(22.5, new CompassFormat()));
        rangeAxis.setStandardTickUnits(units);
        
        // add the wind force with a secondary dataset/renderer/axis
        plot.setRangeAxis(rangeAxis);
        final XYItemRenderer renderer2 = new XYAreaRenderer();
        final ValueAxis axis2 = new NumberAxis("Force");
        axis2.setRange(0.0, 12.0);
        renderer2.setSeriesPaint(0, new Color(0, 0, 255, 128));
        plot.setDataset(1, createForceDataset(600));
        plot.setRenderer(1, renderer2);
        plot.setRangeAxis(1, axis2);
        plot.mapDatasetToRangeAxis(1, 1);
        
        return chart;
    }
    /**
     * Starting point for the demonstration application.
     *
     * @param args  ignored.
     */
    public static void main(final String[] args) {
        final CompassFormatDemo demo = new CompassFormatDemo("Compass Format Demo");
        demo.pack();
        RefineryUtilities.centerFrameOnScreen(demo);
        demo.setVisible(true);
    }
}