001 /* =========================================================== 002 * JFreeChart : a free chart library for the Java(tm) platform 003 * =========================================================== 004 * 005 * (C) Copyright 2000-2005, 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 2002-2005, 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 1.4.2.2 2005/10/25 20:50:49 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 * @author Bryan Scott 061 */ 062 public class ShipNeedle extends MeterNeedle 063 implements Cloneable, Serializable { 064 065 /** For serialization. */ 066 private static final long serialVersionUID = 149554868169435612L; 067 068 /** 069 * Draws the needle. 070 * 071 * @param g2 the graphics device. 072 * @param plotArea the plot area. 073 * @param rotate the rotation point. 074 * @param angle the angle. 075 */ 076 protected void drawNeedle(Graphics2D g2, Rectangle2D plotArea, 077 Point2D rotate, double angle) { 078 079 GeneralPath shape = new GeneralPath(); 080 shape.append(new Arc2D.Double( 081 -9.0, -7.0, 10, 14, 0.0, 25.5, Arc2D.OPEN), true 082 ); 083 shape.append(new Arc2D.Double( 084 0.0, -7.0, 10, 14, 154.5, 25.5, Arc2D.OPEN), true 085 ); 086 shape.closePath(); 087 getTransform().setToTranslation(plotArea.getMinX(), plotArea.getMaxY()); 088 getTransform().scale(plotArea.getWidth(), plotArea.getHeight() / 3); 089 shape.transform(getTransform()); 090 091 if ((rotate != null) && (angle != 0)) { 092 /// we have rotation 093 getTransform().setToRotation(angle, rotate.getX(), rotate.getY()); 094 shape.transform(getTransform()); 095 } 096 097 defaultDisplay(g2, shape); 098 } 099 100 /** 101 * Tests another object for equality with this object. 102 * 103 * @param object the object to test. 104 * 105 * @return A boolean. 106 */ 107 public boolean equals(Object object) { 108 if (object == null) { 109 return false; 110 } 111 if (object == this) { 112 return true; 113 } 114 if (super.equals(object) && object instanceof ShipNeedle) { 115 return true; 116 } 117 return false; 118 } 119 120 /** 121 * Returns a clone of this needle. 122 * 123 * @return A clone. 124 */ 125 public Object clone() throws CloneNotSupportedException { 126 return super.clone(); 127 } 128 129 } 130