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