001 /* ===========================================================
002 * JFreeChart : a free chart library for the Java(tm) platform
003 * ===========================================================
004 *
005 * (C) Copyright 2000-2006, 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 * [Java is a trademark or registered trademark of Sun Microsystems, Inc.
025 * in the United States and other countries.]
026 *
027 * ---------------
028 * ShipNeedle.java
029 * ---------------
030 * (C) Copyright 2002-2006, 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 * $Id: ShipNeedle.java,v 1.4.2.3 2006/08/02 10:40:57 mungady Exp $
037 *
038 * Changes:
039 * --------
040 * 25-Sep-2002 : Version 1, contributed by Bryan Scott (DG);
041 * 27-Mar-2003 : Implemented Serializable (DG);
042 * 09-Sep-2003 : Added equals() method (DG);
043 * 08-Jun-2005 : Implemented Cloneable (DG);
044 *
045 */
046
047 package org.jfree.chart.needle;
048
049 import java.awt.Graphics2D;
050 import java.awt.geom.Arc2D;
051 import java.awt.geom.GeneralPath;
052 import java.awt.geom.Point2D;
053 import java.awt.geom.Rectangle2D;
054 import java.io.Serializable;
055
056 /**
057 * A needle in the shape of a ship, for use with the
058 * {@link org.jfree.chart.plot.CompassPlot} class.
059 */
060 public class ShipNeedle extends MeterNeedle
061 implements Cloneable, Serializable {
062
063 /** For serialization. */
064 private static final long serialVersionUID = 149554868169435612L;
065
066 /**
067 * Draws the needle.
068 *
069 * @param g2 the graphics device.
070 * @param plotArea the plot area.
071 * @param rotate the rotation point.
072 * @param angle the angle.
073 */
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 public boolean equals(Object object) {
104 if (object == null) {
105 return false;
106 }
107 if (object == this) {
108 return true;
109 }
110 if (super.equals(object) && object instanceof ShipNeedle) {
111 return true;
112 }
113 return false;
114 }
115
116 /**
117 * Returns a clone of this needle.
118 *
119 * @return A clone.
120 *
121 * @throws CloneNotSupportedException if the <code>ShipNeedle</code>
122 * cannot be cloned (in theory, this should not happen).
123 */
124 public Object clone() throws CloneNotSupportedException {
125 return super.clone();
126 }
127
128 }
129