jfreechart.java

JfreeChart 常用图表例子

    }

    /**
     * Registers an object for notification of changes to the chart.
     *
     * @param listener  the listener (<code>null</code> not permitted).
     */
    public void addChangeListener(ChartChangeListener listener) {
        if (listener == null) {
            throw new IllegalArgumentException("Null 'listener' argument.");
        }
        this.changeListeners.add(ChartChangeListener.class, listener);
    }

    /**
     * Deregisters an object for notification of changes to the chart.
     *
     * @param listener  the listener (<code>null</code> not permitted)
     */
    public void removeChangeListener(ChartChangeListener listener) {
        if (listener == null) {
            throw new IllegalArgumentException("Null 'listener' argument.");
        }
        this.changeListeners.remove(ChartChangeListener.class, listener);
    }

    /**
     * Sends a default {@link ChartChangeEvent} to all registered listeners.
     * <P>
     * This method is for convenience only.
     */
    public void fireChartChanged() {
        ChartChangeEvent event = new ChartChangeEvent(this);
        notifyListeners(event);
    }

    /**
     * Sends a {@link ChartChangeEvent} to all registered listeners.
     *
     * @param event  information about the event that triggered the 
     *               notification.
     */
    protected void notifyListeners(ChartChangeEvent event) {
        if (this.notify) {
            Object[] listeners = this.changeListeners.getListenerList();
            for (int i = listeners.length - 2; i >= 0; i -= 2) {
                if (listeners[i] == ChartChangeListener.class) {
                    ((ChartChangeListener) listeners[i + 1]).chartChanged(
                        event
                    );
                }
            }
        }
    }

    /**
     * Registers an object for notification of progress events relating to the 
     * chart.
     *
     * @param listener  the object being registered.
     */
    public void addProgressListener(ChartProgressListener listener) {
        this.progressListeners.add(ChartProgressListener.class, listener);
    }

    /**
     * Deregisters an object for notification of changes to the chart.
     *
     * @param listener  the object being deregistered.
     */
    public void removeProgressListener(ChartProgressListener listener) {
        this.progressListeners.remove(ChartProgressListener.class, listener);
    }

    /**
     * Sends a {@link ChartProgressEvent} to all registered listeners.
     *
     * @param event  information about the event that triggered the 
     *               notification.
     */
    protected void notifyListeners(ChartProgressEvent event) {

        Object[] listeners = this.progressListeners.getListenerList();
        for (int i = listeners.length - 2; i >= 0; i -= 2) {
            if (listeners[i] == ChartProgressListener.class) {
                ((ChartProgressListener) listeners[i + 1]).chartProgress(event);
            }
        }

    }

    /**
     * Receives notification that a chart title has changed, and passes this
     * on to registered listeners.
     *
     * @param event  information about the chart title change.
     */
    public void titleChanged(TitleChangeEvent event) {
        event.setChart(this);
        notifyListeners(event);
    }

    /**
     * Receives notification that the chart legend has changed, and passes this
     * on to registered listeners.
     *
     * @param event  information about the chart legend change.
     */
    public void legendChanged(LegendChangeEvent event) {
        event.setChart(this);
        notifyListeners(event);
    }

    /**
     * Receives notification that the plot has changed, and passes this on to
     * registered listeners.
     *
     * @param event  information about the plot change.
     */
    public void plotChanged(PlotChangeEvent event) {
        event.setChart(this);
        notifyListeners(event);
    }

    /**
     * Tests this chart for equality with another object.
     *
     * @param obj  the object (<code>null</code> permitted).
     *
     * @return A boolean.
     */
    public boolean equals(Object obj) {

        if (obj == this) {
            return true;
        }

        if (!(obj instanceof JFreeChart)) {
            return false;
        }

        JFreeChart that = (JFreeChart) obj;
        if (!ObjectUtilities.equal(this.title, that.title)) {
            return false;
        }
        if (!ObjectUtilities.equal(this.subtitles, that.subtitles)) {
            return false;
        }
        if (!ObjectUtilities.equal(this.oldLegend, that.oldLegend)) {
            return false;
        }
        if (!ObjectUtilities.equal(this.plot, that.plot)) {
            return false;
        }
        if (!ObjectUtilities.equal(
            this.backgroundPaint, that.backgroundPaint
        )) {
            return false;
        }
        if (!ObjectUtilities.equal(
            this.backgroundImage, that.backgroundImage
        )) {
            return false;
        }
        if (this.backgroundImageAlignment != that.backgroundImageAlignment) {
            return false;
        }
        if (this.backgroundImageAlpha != that.backgroundImageAlpha) {
            return false;
        }
        if (this.notify != that.notify) {
            return false;
        }

        return true;

    }

    /**
     * Provides serialization support.
     *
     * @param stream  the output stream.
     *
     * @throws IOException  if there is an I/O error.
     */
    private void writeObject(ObjectOutputStream stream) throws IOException {
        stream.defaultWriteObject();
        SerialUtilities.writeStroke(this.borderStroke, stream);
        SerialUtilities.writePaint(this.borderPaint, stream);
        SerialUtilities.writePaint(this.backgroundPaint, stream);
    }

    /**
     * Provides serialization support.
     *
     * @param stream  the input stream.
     *
     * @throws IOException  if there is an I/O error.
     * @throws ClassNotFoundException  if there is a classpath problem.
     */
    private void readObject(ObjectInputStream stream) 
        throws IOException, ClassNotFoundException {
        stream.defaultReadObject();
        this.borderStroke = SerialUtilities.readStroke(stream);
        this.borderPaint = SerialUtilities.readPaint(stream);
        this.backgroundPaint = SerialUtilities.readPaint(stream);
        this.progressListeners = new EventListenerList();
        this.changeListeners = new EventListenerList();
        this.renderingHints = new RenderingHints(
            RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON
        );

        // register as a listener with sub-components...
        if (this.title != null) {
            this.title.addChangeListener(this);
        }

        for (int i = 0; i < getSubtitleCount(); i++) {
            getSubtitle(i).addChangeListener(this);
        }

        if (this.oldLegend != null) {
            this.oldLegend.addChangeListener(this);
        }

        //if (this.plot != null) {
        // the plot can never be null.
        this.plot.addChangeListener(this);
        //}

    }

    /**
     * Prints information about JFreeChart to standard output.
     *
     * @param args  no arguments are honored.
     */
    public static void main(String[] args) {
        System.out.println(JFreeChart.INFO.toString());
    }

    /**
     * Clones the object, and takes care of listeners.
     * Note: caller shall register its own listeners on cloned graph.
     * 
     * @return A clone.
     * 
     * @throws CloneNotSupportedException if the chart is not cloneable.
     */
    public Object clone() throws CloneNotSupportedException {
        JFreeChart chart = (JFreeChart) super.clone();

        chart.renderingHints = (RenderingHints) this.renderingHints.clone();
        // private boolean borderVisible;
        // private transient Stroke borderStroke;
        // private transient Paint borderPaint;

        if (this.title != null) {
            chart.title = (TextTitle) this.title.clone();
            chart.title.addChangeListener(chart);
        }

        chart.subtitles = new ArrayList();
        for (int i = 0; i < getSubtitleCount(); i++) {
            Title subtitle = (Title) getSubtitle(i).clone();
            chart.subtitles.add(subtitle);
            subtitle.addChangeListener(chart);
        }

        if (this.oldLegend != null) {
            chart.oldLegend = (OldLegend) this.oldLegend.clone();
            chart.oldLegend.registerChart(chart);
            chart.oldLegend.addChangeListener(chart);
        }

        if (this.plot != null) {
            chart.plot = (Plot) this.plot.clone();
            chart.plot.addChangeListener(chart);
        }

        //private boolean antialias;
        //private transient Paint backgroundPaint;
        //private transient Image backgroundImage;  // todo: not serialized yet
        //private int backgroundImageAlignment = Align.FIT;
        //private float backgroundImageAlpha = 0.5f;

        chart.progressListeners = new EventListenerList();
        chart.changeListeners = new EventListenerList();
        //private boolean notify;

        return chart;
    }

}

/**
 * Information about the JFreeChart project.  One instance of this class is 
 * assigned to <code>JFreeChart.INFO<code>.
 */
class JFreeChartInfo extends ProjectInfo {

    /** 
     * Default constructor. 
     */
    public JFreeChartInfo() {

        // get a locale-specific resource bundle...
        String baseResourceClass 
            = "org.jfree.chart.resources.JFreeChartResources";
        ResourceBundle resources = ResourceBundle.getBundle(baseResourceClass);

        setName(resources.getString("project.name"));
        setVersion(resources.getString("project.version"));
        setInfo(resources.getString("project.info"));
        setCopyright(resources.getString("project.copyright"));
        setLogo(null);  // load only when required
        setLicenceName("LGPL");
        setLicenceText(Licences.getInstance().getLGPL());

        setContributors(Arrays.asList(
            new Contributor[]{
                new Contributor("Eric Alexander", "-"),
                new Contributor(
                    "Richard Atkinson", "[e-mail]"
                ),
                new Contributor("David Basten", "-"),
                new Contributor("David Berry", "-"),
                new Contributor("Anthony Boulestreau", "-"),
                new Contributor("Jeremy Bowman", "-"),
                new Contributor("Nicolas Brodu", "-"),
                new Contributor("David Browning", "-"),
                new Contributor("S???ren Caspersen", "-"),
                new Contributor("Chuanhao Chiu", "-"),
                new Contributor("Brian Cole", "-"),
                new Contributor("Pascal Collet", "-"),
                new Contributor("Martin Cordova", "-"),
                new Contributor("Paolo Cova", "-"),
                new Contributor("Mike Duffy", "-"),
                new Contributor("Don Elliott", "-"),
                new Contributor("Jonathan Gabbai", "-"),
                new Contributor(
                    "David Gilbert", "[e-mail]"
                ),
                new Contributor("Serge V. Grachov", "-"),
                new Contributor("Daniel Gredler", "-"),
                new Contributor("Hans-Jurgen Greiner", "-"),
                new Contributor("Joao Guilherme Del Valle", "-"),
                new Contributor("Aiman Han", "-"),
                new Contributor("Cameron Hayne", "-"),
                new Contributor("Jon Iles", "-"),
                new Contributor("Wolfgang Irler", "-"),
                new Contributor("Xun Kang", "-"),
                new Contributor("Bill Kelemen", "-"),
                new Contributor("Norbert Kiesel", "-"),
                new Contributor("Gideon Krause", "-"),
                new Contributor("Arnaud Lelievre", "-"),
                new Contributor("Wolfgang Lenhard", "-"),
                new Contributor("David Li", "-"),
                new Contributor("Tin Luu", "-"),
                new Contributor("Craig MacFarlane", "-"),
                new Contributor("Achilleus Mantzios", "-"),
                new Contributor("Thomas Meier", "-"),
                new Contributor("Jim Moore", "-"),
                new Contributor("Jonathan Nash", "-"),
                new Contributor("Barak Naveh", "-"),
                new Contributor("David M. O'Donnell", "-"),
                new Contributor("Krzysztof Paz", "-"),
                new Contributor("Tomer Peretz", "-"),
                new Contributor("Andrzej Porebski", "-"),
                new Contributor("Xavier Poinsard", "-"),
                new Contributor("Viktor Rajewski", "-"),
                new Contributor("Eduardo Ramalho", "-"),
                new Contributor("Michael Rauch", "-"),
                new Contributor("Cameron Riley", "-"),
                new Contributor("Dan Rivett", "[e-mail]"),
                new Contributor("Scott Sams", "-"),
                new Contributor("Michel Santos", "-"),
                new Contributor("Thierry Saura", "-"),
                new Contributor("Andreas Schneider", "-"),
                new Contributor("Jean-Luc SCHWAB", "-"),
                new Contributor("Bryan Scott", "-"),
                new Contributor("Tobias Selb", "-"),
                new Contributor("Mofeed Shahin", "-"),
                new Contributor("Greg Steckman", "-"),
                new Contributor("Roger Studner", "-"),
                new Contributor("Irv Thomae", "-"),
                new Contributor("Eric Thomas", "-"),
                new Contributor("Rich Unger", "-"),
                new Contributor("Daniel van Enckevort", "-"),
                new Contributor("Laurence Vanhelsuwe", "-"),
                new Contributor("Sylvain Vieujot", "-"),
                new Contributor("Mark Watson", "www.markwatson.com"),
                new Contributor("Alex Weber", "-"),
                new Contributor("Matthew Wright", "-"),
                new Contributor("Benoit Xhenseval", "-"),
                new Contributor(
                    "Christian W. Zuckschwerdt", 
                    "[e-mail]"
                ),
                new Contributor("Hari", "-"),
                new Contributor("Sam (oldman)", "-"),
            }
        ));

        addLibrary(JCommon.INFO);

    }

    /**
     * Returns the JFreeChart logo (a picture of a gorilla).
     *
     * @return The JFreeChart logo.
     */
    public Image getLogo() {

        Image logo = super.getLogo();
        if (logo == null) {
            URL imageURL = ClassLoader.getSystemResource(
                "org/jfree/chart/gorilla.jpg"
            );
            if (imageURL != null) {
                ImageIcon temp = new ImageIcon(imageURL);  
                    // use ImageIcon because it waits for the image to load...
                logo = temp.getImage();
                setLogo(logo);
            }
        }
        return logo;

    }

}