001/* ===========================================================
002 * JFreeChart : a free chart library for the Java(tm) platform
003 * ===========================================================
004 *
005 * (C) Copyright 2000-2013, by Object Refinery Limited 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 2002-2008, by the Australian Antarctic Division and
031 *                          Contributors.
032 *
033 * Original Author:  Bryan Scott (for the Australian Antarctic Division);
034 * Contributor(s):   David Gilbert (for Object Refinery Limited);
035 *
036 * Changes:
037 * --------
038 * 25-Sep-2002 : Version 1, contributed by Bryan Scott (DG);
039 * 27-Mar-2003 : Implemented Serializable (DG);
040 * 09-Sep-2003 : Added equals() method (DG);
041 * 08-Jun-2005 : Implemented Cloneable (DG);
042 * 22-Nov-2007 : Implemented hashCode() (DG);
043 *
044 */
045
046package org.jfree.chart.needle;
047
048import java.awt.Graphics2D;
049import java.awt.geom.Arc2D;
050import java.awt.geom.GeneralPath;
051import java.awt.geom.Point2D;
052import java.awt.geom.Rectangle2D;
053import java.io.Serializable;
054
055/**
056 * A needle in the shape of a ship, for use with the
057 * {@link org.jfree.chart.plot.CompassPlot} class.
058 */
059public class ShipNeedle extends MeterNeedle
060                        implements Cloneable, Serializable {
061
062    /** For serialization. */
063    private static final long serialVersionUID = 149554868169435612L;
064
065    /**
066     * Draws the needle.
067     *
068     * @param g2  the graphics device.
069     * @param plotArea  the plot area.
070     * @param rotate  the rotation point.
071     * @param angle  the angle.
072     */
073    @Override
074    protected void drawNeedle(Graphics2D g2, Rectangle2D plotArea,
075                              Point2D rotate, double angle) {
076
077        GeneralPath shape = new GeneralPath();
078        shape.append(new Arc2D.Double(-9.0, -7.0, 10, 14, 0.0, 25.5,
079                Arc2D.OPEN), true);
080        shape.append(new Arc2D.Double(0.0, -7.0, 10, 14, 154.5, 25.5,
081                Arc2D.OPEN), true);
082        shape.closePath();
083        getTransform().setToTranslation(plotArea.getMinX(), plotArea.getMaxY());
084        getTransform().scale(plotArea.getWidth(), plotArea.getHeight() / 3);
085        shape.transform(getTransform());
086
087        if ((rotate != null) && (angle != 0)) {
088            /// we have rotation
089            getTransform().setToRotation(angle, rotate.getX(), rotate.getY());
090            shape.transform(getTransform());
091        }
092
093        defaultDisplay(g2, shape);
094    }
095
096    /**
097     * Tests another object for equality with this object.
098     *
099     * @param object  the object to test.
100     *
101     * @return A boolean.
102     */
103    @Override
104    public boolean equals(Object object) {
105        if (object == null) {
106            return false;
107        }
108        if (object == this) {
109            return true;
110        }
111        if (super.equals(object) && object instanceof ShipNeedle) {
112            return true;
113        }
114        return false;
115    }
116
117    /**
118     * Returns a hash code for this instance.
119     *
120     * @return A hash code.
121     */
122    @Override
123    public int hashCode() {
124        return super.hashCode();
125    }
126
127    /**
128     * Returns a clone of this needle.
129     *
130     * @return A clone.
131     *
132     * @throws CloneNotSupportedException if the <code>ShipNeedle</code>
133     *     cannot be cloned (in theory, this should not happen).
134     */
135    @Override
136    public Object clone() throws CloneNotSupportedException {
137        return super.clone();
138    }
139
140}
141