001/* ===========================================================
002 * JFreeChart : a free chart library for the Java(tm) platform
003 * ===========================================================
004 *
005 * (C) Copyright 2000-present, by David Gilbert and Contributors.
006 *
007 * Project Info:  http://www.jfree.org/jfreechart/index.html
008 *
009 * This library is free software; you can redistribute it and/or modify it
010 * under the terms of the GNU Lesser General Public License as published by
011 * the Free Software Foundation; either version 2.1 of the License, or
012 * (at your option) any later version.
013 *
014 * This library is distributed in the hope that it will be useful, but
015 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
016 * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
017 * License for more details.
018 *
019 * You should have received a copy of the GNU Lesser General Public
020 * License along with this library; if not, write to the Free Software
021 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301,
022 * USA.
023 *
024 * [Oracle and Java are registered trademarks of Oracle and/or its affiliates. 
025 * Other names may be trademarks of their respective owners.]
026 *
027 * ---------------
028 * ShipNeedle.java
029 * ---------------
030 * (C) Copyright 2002-present, by the Australian Antarctic Division and
031 *                          Contributors.
032 *
033 * Original Author:  Bryan Scott (for the Australian Antarctic Division);
034 * Contributor(s):   David Gilbert;
035 *
036 */
037
038package org.jfree.chart.needle;
039
040import java.awt.Graphics2D;
041import java.awt.geom.Arc2D;
042import java.awt.geom.GeneralPath;
043import java.awt.geom.Point2D;
044import java.awt.geom.Rectangle2D;
045import java.io.Serializable;
046
047/**
048 * A needle in the shape of a ship, for use with the
049 * {@link org.jfree.chart.plot.CompassPlot} class.
050 */
051public class ShipNeedle extends MeterNeedle implements Cloneable, Serializable {
052
053    /** For serialization. */
054    private static final long serialVersionUID = 149554868169435612L;
055
056    /**
057     * Draws the needle.
058     *
059     * @param g2  the graphics device.
060     * @param plotArea  the plot area.
061     * @param rotate  the rotation point.
062     * @param angle  the angle.
063     */
064    @Override
065    protected void drawNeedle(Graphics2D g2, Rectangle2D plotArea,
066            Point2D rotate, double angle) {
067
068        GeneralPath shape = new GeneralPath();
069        shape.append(new Arc2D.Double(-9.0, -7.0, 10, 14, 0.0, 25.5,
070                Arc2D.OPEN), true);
071        shape.append(new Arc2D.Double(0.0, -7.0, 10, 14, 154.5, 25.5,
072                Arc2D.OPEN), true);
073        shape.closePath();
074        getTransform().setToTranslation(plotArea.getMinX(), plotArea.getMaxY());
075        getTransform().scale(plotArea.getWidth(), plotArea.getHeight() / 3);
076        shape.transform(getTransform());
077
078        if ((rotate != null) && (angle != 0)) {
079            /// we have rotation
080            getTransform().setToRotation(angle, rotate.getX(), rotate.getY());
081            shape.transform(getTransform());
082        }
083
084        defaultDisplay(g2, shape);
085    }
086
087    /**
088     * Tests another object for equality with this object.
089     *
090     * @param object  the object to test.
091     *
092     * @return A boolean.
093     */
094    @Override
095    public boolean equals(Object object) {
096        if (object == null) {
097            return false;
098        }
099        if (object == this) {
100            return true;
101        }
102        if (super.equals(object) && object instanceof ShipNeedle) {
103            return true;
104        }
105        return false;
106    }
107
108    /**
109     * Returns a hash code for this instance.
110     *
111     * @return A hash code.
112     */
113    @Override
114    public int hashCode() {
115        return super.hashCode();
116    }
117
118    /**
119     * Returns a clone of this needle.
120     *
121     * @return A clone.
122     *
123     * @throws CloneNotSupportedException if the {@code ShipNeedle}
124     *     cannot be cloned (in theory, this should not happen).
125     */
126    @Override
127    public Object clone() throws CloneNotSupportedException {
128        return super.clone();
129    }
130
131}
132