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jfreechart example source code file (CompassPlot.java)

This example jfreechart source code file (CompassPlot.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Java - jfreechart tags/keywords

area, awt, compassplot, ellipse2d, font, font, geometry, illegalargumentexception, io, meterneedle, meterneedle, null, paint, paint, rectangle2d, util, valuedataset, valuedataset

The jfreechart CompassPlot.java source code

/* ===========================================================
 * JFreeChart : a free chart library for the Java(tm) platform
 * ===========================================================
 *
 * (C) Copyright 2000-2008, 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., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301,
 * USA.
 *
 * [Java is a trademark or registered trademark of Sun Microsystems, Inc.
 * in the United States and other countries.]
 *
 * ----------------
 * CompassPlot.java
 * ----------------
 * (C) Copyright 2002-2008, by the Australian Antarctic Division and
 * Contributors.
 *
 * Original Author:  Bryan Scott (for the Australian Antarctic Division);
 * Contributor(s):   David Gilbert (for Object Refinery Limited);
 *                   Arnaud Lelievre;
 *
 * Changes:
 * --------
 * 25-Sep-2002 : Version 1, contributed by Bryan Scott (DG);
 * 23-Jan-2003 : Removed one constructor (DG);
 * 26-Mar-2003 : Implemented Serializable (DG);
 * 27-Mar-2003 : Changed MeterDataset to ValueDataset (DG);
 * 21-Aug-2003 : Implemented Cloneable (DG);
 * 08-Sep-2003 : Added internationalization via use of properties
 *               resourceBundle (RFE 690236) (AL);
 * 09-Sep-2003 : Changed Color --> Paint (DG);
 * 15-Sep-2003 : Added null data value check (bug report 805009) (DG);
 * 16-Sep-2003 : Changed ChartRenderingInfo --> PlotRenderingInfo (DG);
 * 16-Mar-2004 : Added support for revolutionDistance to enable support for
 *               other units than degrees.
 * 16-Mar-2004 : Enabled LongNeedle to rotate about center.
 * 11-Jan-2005 : Removed deprecated code in preparation for 1.0.0 release (DG);
 * 17-Apr-2005 : Fixed bug in clone() method (DG);
 * 05-May-2005 : Updated draw() method parameters (DG);
 * 08-Jun-2005 : Fixed equals() method to handle GradientPaint (DG);
 * 16-Jun-2005 : Renamed getData() --> getDatasets() and
 *               addData() --> addDataset() (DG);
 * ------------- JFREECHART 1.0.x ---------------------------------------------
 * 20-Mar-2007 : Fixed serialization (DG);
 * 18-Dec-2008 : Use ResourceBundleWrapper - see patch 1607918 by
 *               Jess Thrysoee (DG);
 *
 */

package org.jfree.chart.plot;

import java.awt.BasicStroke;
import java.awt.Color;
import java.awt.Font;
import java.awt.Graphics2D;
import java.awt.Paint;
import java.awt.Polygon;
import java.awt.Stroke;
import java.awt.geom.Area;
import java.awt.geom.Ellipse2D;
import java.awt.geom.Point2D;
import java.awt.geom.Rectangle2D;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.io.Serializable;
import java.util.Arrays;
import java.util.ResourceBundle;

import org.jfree.chart.LegendItemCollection;
import org.jfree.chart.event.PlotChangeEvent;
import org.jfree.chart.needle.ArrowNeedle;
import org.jfree.chart.needle.LineNeedle;
import org.jfree.chart.needle.LongNeedle;
import org.jfree.chart.needle.MeterNeedle;
import org.jfree.chart.needle.MiddlePinNeedle;
import org.jfree.chart.needle.PinNeedle;
import org.jfree.chart.needle.PlumNeedle;
import org.jfree.chart.needle.PointerNeedle;
import org.jfree.chart.needle.ShipNeedle;
import org.jfree.chart.needle.WindNeedle;
import org.jfree.chart.util.ResourceBundleWrapper;
import org.jfree.data.general.DefaultValueDataset;
import org.jfree.data.general.ValueDataset;
import org.jfree.io.SerialUtilities;
import org.jfree.ui.RectangleInsets;
import org.jfree.util.ObjectUtilities;
import org.jfree.util.PaintUtilities;

/**
 * A specialised plot that draws a compass to indicate a direction based on the
 * value from a {@link ValueDataset}.
 */
public class CompassPlot extends Plot implements Cloneable, Serializable {

    /** For serialization. */
    private static final long serialVersionUID = 6924382802125527395L;

    /** The default label font. */
    public static final Font DEFAULT_LABEL_FONT = new Font("SansSerif",
            Font.BOLD, 10);

    /** A constant for the label type. */
    public static final int NO_LABELS = 0;

    /** A constant for the label type. */
    public static final int VALUE_LABELS = 1;

    /** The label type (NO_LABELS, VALUE_LABELS). */
    private int labelType;

    /** The label font. */
    private Font labelFont;

    /** A flag that controls whether or not a border is drawn. */
    private boolean drawBorder = false;

    /** The rose highlight paint. */
    private transient Paint roseHighlightPaint = Color.black;

    /** The rose paint. */
    private transient Paint rosePaint = Color.yellow;

    /** The rose center paint. */
    private transient Paint roseCenterPaint = Color.white;

    /** The compass font. */
    private Font compassFont = new Font("Arial", Font.PLAIN, 10);

    /** A working shape. */
    private transient Ellipse2D circle1;

    /** A working shape. */
    private transient Ellipse2D circle2;

    /** A working area. */
    private transient Area a1;

    /** A working area. */
    private transient Area a2;

    /** A working shape. */
    private transient Rectangle2D rect1;

    /** An array of value datasets. */
    private ValueDataset[] datasets = new ValueDataset[1];

    /** An array of needles. */
    private MeterNeedle[] seriesNeedle = new MeterNeedle[1];

    /** The resourceBundle for the localization. */
    protected static ResourceBundle localizationResources
            = ResourceBundleWrapper.getBundle(
                    "org.jfree.chart.plot.LocalizationBundle");

    /**
     * The count to complete one revolution.  Can be arbitrarily set
     * For degrees (the default) it is 360, for radians this is 2*Pi, etc
     */
    protected double revolutionDistance = 360;

    /**
     * Default constructor.
     */
    public CompassPlot() {
        this(new DefaultValueDataset());
    }

    /**
     * Constructs a new compass plot.
     *
     * @param dataset  the dataset for the plot (<code>null permitted).
     */
    public CompassPlot(ValueDataset dataset) {
        super();
        if (dataset != null) {
            this.datasets[0] = dataset;
            dataset.addChangeListener(this);
        }
        this.circle1 = new Ellipse2D.Double();
        this.circle2 = new Ellipse2D.Double();
        this.rect1   = new Rectangle2D.Double();
        setSeriesNeedle(0);
    }

    /**
     * Returns the label type.  Defined by the constants: {@link #NO_LABELS}
     * and {@link #VALUE_LABELS}.
     *
     * @return The label type.
     *
     * @see #setLabelType(int)
     */
    public int getLabelType() {
        // FIXME: this attribute is never used - deprecate?
        return this.labelType;
    }

    /**
     * Sets the label type (either {@link #NO_LABELS} or {@link #VALUE_LABELS}.
     *
     * @param type  the type.
     *
     * @see #getLabelType()
     */
    public void setLabelType(int type) {
        // FIXME: this attribute is never used - deprecate?
        if ((type != NO_LABELS) && (type != VALUE_LABELS)) {
            throw new IllegalArgumentException(
                    "MeterPlot.setLabelType(int): unrecognised type.");
        }
        if (this.labelType != type) {
            this.labelType = type;
            fireChangeEvent();
        }
    }

    /**
     * Returns the label font.
     *
     * @return The label font.
     *
     * @see #setLabelFont(Font)
     */
    public Font getLabelFont() {
        // FIXME: this attribute is not used - deprecate?
        return this.labelFont;
    }

    /**
     * Sets the label font and sends a {@link PlotChangeEvent} to all
     * registered listeners.
     *
     * @param font  the new label font.
     *
     * @see #getLabelFont()
     */
    public void setLabelFont(Font font) {
        // FIXME: this attribute is not used - deprecate?
        if (font == null) {
            throw new IllegalArgumentException("Null 'font' not allowed.");
        }
        this.labelFont = font;
        fireChangeEvent();
    }

    /**
     * Returns the paint used to fill the outer circle of the compass.
     *
     * @return The paint (never <code>null).
     *
     * @see #setRosePaint(Paint)
     */
    public Paint getRosePaint() {
        return this.rosePaint;
    }

    /**
     * Sets the paint used to fill the outer circle of the compass,
     * and sends a {@link PlotChangeEvent} to all registered listeners.
     *
     * @param paint  the paint (<code>null not permitted).
     *
     * @see #getRosePaint()
     */
    public void setRosePaint(Paint paint) {
        if (paint == null) {
            throw new IllegalArgumentException("Null 'paint' argument.");
        }
        this.rosePaint = paint;
        fireChangeEvent();
    }

    /**
     * Returns the paint used to fill the inner background area of the
     * compass.
     *
     * @return The paint (never <code>null).
     *
     * @see #setRoseCenterPaint(Paint)
     */
    public Paint getRoseCenterPaint() {
        return this.roseCenterPaint;
    }

    /**
     * Sets the paint used to fill the inner background area of the compass,
     * and sends a {@link PlotChangeEvent} to all registered listeners.
     *
     * @param paint  the paint (<code>null not permitted).
     *
     * @see #getRoseCenterPaint()
     */
    public void setRoseCenterPaint(Paint paint) {
        if (paint == null) {
            throw new IllegalArgumentException("Null 'paint' argument.");
        }
        this.roseCenterPaint = paint;
        fireChangeEvent();
    }

    /**
     * Returns the paint used to draw the circles, symbols and labels on the
     * compass.
     *
     * @return The paint (never <code>null).
     *
     * @see #setRoseHighlightPaint(Paint)
     */
    public Paint getRoseHighlightPaint() {
        return this.roseHighlightPaint;
    }

    /**
     * Sets the paint used to draw the circles, symbols and labels of the
     * compass, and sends a {@link PlotChangeEvent} to all registered listeners.
     *
     * @param paint  the paint (<code>null not permitted).
     *
     * @see #getRoseHighlightPaint()
     */
    public void setRoseHighlightPaint(Paint paint) {
        if (paint == null) {
            throw new IllegalArgumentException("Null 'paint' argument.");
        }
        this.roseHighlightPaint = paint;
        fireChangeEvent();
    }

    /**
     * Returns a flag that controls whether or not a border is drawn.
     *
     * @return The flag.
     *
     * @see #setDrawBorder(boolean)
     */
    public boolean getDrawBorder() {
        return this.drawBorder;
    }

    /**
     * Sets a flag that controls whether or not a border is drawn.
     *
     * @param status  the flag status.
     *
     * @see #getDrawBorder()
     */
    public void setDrawBorder(boolean status) {
        this.drawBorder = status;
        fireChangeEvent();
    }

    /**
     * Sets the series paint.
     *
     * @param series  the series index.
     * @param paint  the paint.
     *
     * @see #setSeriesOutlinePaint(int, Paint)
     */
    public void setSeriesPaint(int series, Paint paint) {
       // super.setSeriesPaint(series, paint);
        if ((series >= 0) && (series < this.seriesNeedle.length)) {
            this.seriesNeedle[series].setFillPaint(paint);
        }
    }

    /**
     * Sets the series outline paint.
     *
     * @param series  the series index.
     * @param p  the paint.
     *
     * @see #setSeriesPaint(int, Paint)
     */
    public void setSeriesOutlinePaint(int series, Paint p) {

        if ((series >= 0) && (series < this.seriesNeedle.length)) {
            this.seriesNeedle[series].setOutlinePaint(p);
        }

    }

    /**
     * Sets the series outline stroke.
     *
     * @param series  the series index.
     * @param stroke  the stroke.
     *
     * @see #setSeriesOutlinePaint(int, Paint)
     */
    public void setSeriesOutlineStroke(int series, Stroke stroke) {

        if ((series >= 0) && (series < this.seriesNeedle.length)) {
            this.seriesNeedle[series].setOutlineStroke(stroke);
        }

    }

    /**
     * Sets the needle type.
     *
     * @param type  the type.
     *
     * @see #setSeriesNeedle(int, int)
     */
    public void setSeriesNeedle(int type) {
        setSeriesNeedle(0, type);
    }

    /**
     * Sets the needle for a series.  The needle type is one of the following:
     * <ul>
     * <li>0 = {@link ArrowNeedle};
     * <li>1 = {@link LineNeedle};
     * <li>2 = {@link LongNeedle};
     * <li>3 = {@link PinNeedle};
     * <li>4 = {@link PlumNeedle};
     * <li>5 = {@link PointerNeedle};
     * <li>6 = {@link ShipNeedle};
     * <li>7 = {@link WindNeedle};
     * <li>8 = {@link ArrowNeedle};
     * <li>9 = {@link MiddlePinNeedle};
     * </ul>
     * @param index  the series index.
     * @param type  the needle type.
     *
     * @see #setSeriesNeedle(int)
     */
    public void setSeriesNeedle(int index, int type) {
        switch (type) {
            case 0:
                setSeriesNeedle(index, new ArrowNeedle(true));
                setSeriesPaint(index, Color.red);
                this.seriesNeedle[index].setHighlightPaint(Color.white);
                break;
            case 1:
                setSeriesNeedle(index, new LineNeedle());
                break;
            case 2:
                MeterNeedle longNeedle = new LongNeedle();
                longNeedle.setRotateY(0.5);
                setSeriesNeedle(index, longNeedle);
                break;
            case 3:
                setSeriesNeedle(index, new PinNeedle());
                break;
            case 4:
                setSeriesNeedle(index, new PlumNeedle());
                break;
            case 5:
                setSeriesNeedle(index, new PointerNeedle());
                break;
            case 6:
                setSeriesPaint(index, null);
                setSeriesOutlineStroke(index, new BasicStroke(3));
                setSeriesNeedle(index, new ShipNeedle());
                break;
            case 7:
                setSeriesPaint(index, Color.blue);
                setSeriesNeedle(index, new WindNeedle());
                break;
            case 8:
                setSeriesNeedle(index, new ArrowNeedle(true));
                break;
            case 9:
                setSeriesNeedle(index, new MiddlePinNeedle());
                break;

            default:
                throw new IllegalArgumentException("Unrecognised type.");
        }

    }

    /**
     * Sets the needle for a series and sends a {@link PlotChangeEvent} to all
     * registered listeners.
     *
     * @param index  the series index.
     * @param needle  the needle.
     */
    public void setSeriesNeedle(int index, MeterNeedle needle) {
        if ((needle != null) && (index < this.seriesNeedle.length)) {
            this.seriesNeedle[index] = needle;
        }
        fireChangeEvent();
    }

    /**
     * Returns an array of dataset references for the plot.
     *
     * @return The dataset for the plot, cast as a ValueDataset.
     *
     * @see #addDataset(ValueDataset)
     */
    public ValueDataset[] getDatasets() {
        return this.datasets;
    }

    /**
     * Adds a dataset to the compass.
     *
     * @param dataset  the new dataset (<code>null ignored).
     *
     * @see #addDataset(ValueDataset, MeterNeedle)
     */
    public void addDataset(ValueDataset dataset) {
        addDataset(dataset, null);
    }

    /**
     * Adds a dataset to the compass.
     *
     * @param dataset  the new dataset (<code>null ignored).
     * @param needle  the needle (<code>null permitted).
     */
    public void addDataset(ValueDataset dataset, MeterNeedle needle) {

        if (dataset != null) {
            int i = this.datasets.length + 1;
            ValueDataset[] t = new ValueDataset[i];
            MeterNeedle[] p = new MeterNeedle[i];
            i = i - 2;
            for (; i >= 0; --i) {
                t[i] = this.datasets[i];
                p[i] = this.seriesNeedle[i];
            }
            i = this.datasets.length;
            t[i] = dataset;
            p[i] = ((needle != null) ? needle : p[i - 1]);

            ValueDataset[] a = this.datasets;
            MeterNeedle[] b = this.seriesNeedle;
            this.datasets = t;
            this.seriesNeedle = p;

            for (--i; i >= 0; --i) {
                a[i] = null;
                b[i] = null;
            }
            dataset.addChangeListener(this);
        }
    }

    /**
     * Draws the plot on a Java 2D graphics device (such as the screen or a
     * printer).
     *
     * @param g2  the graphics device.
     * @param area  the area within which the plot should be drawn.
     * @param anchor  the anchor point (<code>null permitted).
     * @param parentState  the state from the parent plot, if there is one.
     * @param info  collects info about the drawing.
     */
    public void draw(Graphics2D g2, Rectangle2D area, Point2D anchor,
                     PlotState parentState,
                     PlotRenderingInfo info) {

        int outerRadius = 0;
        int innerRadius = 0;
        int x1, y1, x2, y2;
        double a;

        if (info != null) {
            info.setPlotArea(area);
        }

        // adjust for insets...
        RectangleInsets insets = getInsets();
        insets.trim(area);

        // draw the background
        if (this.drawBorder) {
            drawBackground(g2, area);
        }

        int midX = (int) (area.getWidth() / 2);
        int midY = (int) (area.getHeight() / 2);
        int radius = midX;
        if (midY < midX) {
            radius = midY;
        }
        --radius;
        int diameter = 2 * radius;

        midX += (int) area.getMinX();
        midY += (int) area.getMinY();

        this.circle1.setFrame(midX - radius, midY - radius, diameter, diameter);
        this.circle2.setFrame(
            midX - radius + 15, midY - radius + 15,
            diameter - 30, diameter - 30
        );
        g2.setPaint(this.rosePaint);
        this.a1 = new Area(this.circle1);
        this.a2 = new Area(this.circle2);
        this.a1.subtract(this.a2);
        g2.fill(this.a1);

        g2.setPaint(this.roseCenterPaint);
        x1 = diameter - 30;
        g2.fillOval(midX - radius + 15, midY - radius + 15, x1, x1);
        g2.setPaint(this.roseHighlightPaint);
        g2.drawOval(midX - radius, midY - radius, diameter, diameter);
        x1 = diameter - 20;
        g2.drawOval(midX - radius + 10, midY - radius + 10, x1, x1);
        x1 = diameter - 30;
        g2.drawOval(midX - radius + 15, midY - radius + 15, x1, x1);
        x1 = diameter - 80;
        g2.drawOval(midX - radius + 40, midY - radius + 40, x1, x1);

        outerRadius = radius - 20;
        innerRadius = radius - 32;
        for (int w = 0; w < 360; w += 15) {
            a = Math.toRadians(w);
            x1 = midX - ((int) (Math.sin(a) * innerRadius));
            x2 = midX - ((int) (Math.sin(a) * outerRadius));
            y1 = midY - ((int) (Math.cos(a) * innerRadius));
            y2 = midY - ((int) (Math.cos(a) * outerRadius));
            g2.drawLine(x1, y1, x2, y2);
        }

        g2.setPaint(this.roseHighlightPaint);
        innerRadius = radius - 26;
        outerRadius = 7;
        for (int w = 45; w < 360; w += 90) {
            a = Math.toRadians(w);
            x1 = midX - ((int) (Math.sin(a) * innerRadius));
            y1 = midY - ((int) (Math.cos(a) * innerRadius));
            g2.fillOval(x1 - outerRadius, y1 - outerRadius, 2 * outerRadius,
                    2 * outerRadius);
        }

        /// Squares
        for (int w = 0; w < 360; w += 90) {
            a = Math.toRadians(w);
            x1 = midX - ((int) (Math.sin(a) * innerRadius));
            y1 = midY - ((int) (Math.cos(a) * innerRadius));

            Polygon p = new Polygon();
            p.addPoint(x1 - outerRadius, y1);
            p.addPoint(x1, y1 + outerRadius);
            p.addPoint(x1 + outerRadius, y1);
            p.addPoint(x1, y1 - outerRadius);
            g2.fillPolygon(p);
        }

        /// Draw N, S, E, W
        innerRadius = radius - 42;
        Font f = getCompassFont(radius);
        g2.setFont(f);
        g2.drawString("N", midX - 5, midY - innerRadius + f.getSize());
        g2.drawString("S", midX - 5, midY + innerRadius - 5);
        g2.drawString("W", midX - innerRadius + 5, midY + 5);
        g2.drawString("E", midX + innerRadius - f.getSize(), midY + 5);

        // plot the data (unless the dataset is null)...
        y1 = radius / 2;
        x1 = radius / 6;
        Rectangle2D needleArea = new Rectangle2D.Double(
            (midX - x1), (midY - y1), (2 * x1), (2 * y1)
        );
        int x = this.seriesNeedle.length;
        int current = 0;
        double value = 0;
        int i = (this.datasets.length - 1);
        for (; i >= 0; --i) {
            ValueDataset data = this.datasets[i];

            if (data != null && data.getValue() != null) {
                value = (data.getValue().doubleValue())
                    % this.revolutionDistance;
                value = value / this.revolutionDistance * 360;
                current = i % x;
                this.seriesNeedle[current].draw(g2, needleArea, value);
            }
        }

        if (this.drawBorder) {
            drawOutline(g2, area);
        }

    }

    /**
     * Returns a short string describing the type of plot.
     *
     * @return A string describing the plot.
     */
    public String getPlotType() {
        return localizationResources.getString("Compass_Plot");
    }

    /**
     * Returns the legend items for the plot.  For now, no legend is available
     * - this method returns null.
     *
     * @return The legend items.
     */
    public LegendItemCollection getLegendItems() {
        return null;
    }

    /**
     * No zooming is implemented for compass plot, so this method is empty.
     *
     * @param percent  the zoom amount.
     */
    public void zoom(double percent) {
        // no zooming possible
    }

    /**
     * Returns the font for the compass, adjusted for the size of the plot.
     *
     * @param radius the radius.
     *
     * @return The font.
     */
    protected Font getCompassFont(int radius) {
        float fontSize = radius / 10.0f;
        if (fontSize < 8) {
            fontSize = 8;
        }
        Font newFont = this.compassFont.deriveFont(fontSize);
        return newFont;
    }

    /**
     * Tests an object for equality with this plot.
     *
     * @param obj  the object (<code>null permitted).
     *
     * @return A boolean.
     */
    public boolean equals(Object obj) {
        if (obj == this) {
            return true;
        }
        if (!(obj instanceof CompassPlot)) {
            return false;
        }
        if (!super.equals(obj)) {
            return false;
        }
        CompassPlot that = (CompassPlot) obj;
        if (this.labelType != that.labelType) {
            return false;
        }
        if (!ObjectUtilities.equal(this.labelFont, that.labelFont)) {
            return false;
        }
        if (this.drawBorder != that.drawBorder) {
            return false;
        }
        if (!PaintUtilities.equal(this.roseHighlightPaint,
                that.roseHighlightPaint)) {
            return false;
        }
        if (!PaintUtilities.equal(this.rosePaint, that.rosePaint)) {
            return false;
        }
        if (!PaintUtilities.equal(this.roseCenterPaint,
                that.roseCenterPaint)) {
            return false;
        }
        if (!ObjectUtilities.equal(this.compassFont, that.compassFont)) {
            return false;
        }
        if (!Arrays.equals(this.seriesNeedle, that.seriesNeedle)) {
            return false;
        }
        if (getRevolutionDistance() != that.getRevolutionDistance()) {
            return false;
        }
        return true;

    }

    /**
     * Returns a clone of the plot.
     *
     * @return A clone.
     *
     * @throws CloneNotSupportedException  this class will not throw this
     *         exception, but subclasses (if any) might.
     */
    public Object clone() throws CloneNotSupportedException {

        CompassPlot clone = (CompassPlot) super.clone();
        if (this.circle1 != null) {
            clone.circle1 = (Ellipse2D) this.circle1.clone();
        }
        if (this.circle2 != null) {
            clone.circle2 = (Ellipse2D) this.circle2.clone();
        }
        if (this.a1 != null) {
            clone.a1 = (Area) this.a1.clone();
        }
        if (this.a2 != null) {
            clone.a2 = (Area) this.a2.clone();
        }
        if (this.rect1 != null) {
            clone.rect1 = (Rectangle2D) this.rect1.clone();
        }
        clone.datasets = (ValueDataset[]) this.datasets.clone();
        clone.seriesNeedle = (MeterNeedle[]) this.seriesNeedle.clone();

        // clone share data sets => add the clone as listener to the dataset
        for (int i = 0; i < this.datasets.length; ++i) {
            if (clone.datasets[i] != null) {
                clone.datasets[i].addChangeListener(clone);
            }
        }
        return clone;

    }

    /**
     * Sets the count to complete one revolution.  Can be arbitrarily set
     * For degrees (the default) it is 360, for radians this is 2*Pi, etc
     *
     * @param size the count to complete one revolution.
     *
     * @see #getRevolutionDistance()
     */
    public void setRevolutionDistance(double size) {
        if (size > 0) {
            this.revolutionDistance = size;
        }
    }

    /**
     * Gets the count to complete one revolution.
     *
     * @return The count to complete one revolution.
     *
     * @see #setRevolutionDistance(double)
     */
    public double getRevolutionDistance() {
        return this.revolutionDistance;
    }

    /**
     * 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.writePaint(this.rosePaint, stream);
        SerialUtilities.writePaint(this.roseCenterPaint, stream);
        SerialUtilities.writePaint(this.roseHighlightPaint, 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.rosePaint = SerialUtilities.readPaint(stream);
        this.roseCenterPaint = SerialUtilities.readPaint(stream);
        this.roseHighlightPaint = SerialUtilities.readPaint(stream);
    }

}

Other jfreechart examples (source code examples)

Here is a short list of links related to this jfreechart CompassPlot.java source code file:



my book on functional programming

 

new blog posts

 

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