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1: /* =========================================================== 2: * JFreeChart : a free chart library for the Java(tm) platform 3: * =========================================================== 4: * 5: * (C) Copyright 2000-2007, by Object Refinery Limited and Contributors. 6: * 7: * Project Info: http://www.jfree.org/jfreechart/index.html 8: * 9: * This library is free software; you can redistribute it and/or modify it 10: * under the terms of the GNU Lesser General Public License as published by 11: * the Free Software Foundation; either version 2.1 of the License, or 12: * (at your option) any later version. 13: * 14: * This library is distributed in the hope that it will be useful, but 15: * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY 16: * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public 17: * License for more details. 18: * 19: * You should have received a copy of the GNU Lesser General Public 20: * License along with this library; if not, write to the Free Software 21: * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, 22: * USA. 23: * 24: * [Java is a trademark or registered trademark of Sun Microsystems, Inc. 25: * in the United States and other countries.] 26: * 27: * --------------- 28: * ShipNeedle.java 29: * --------------- 30: * (C) Copyright 2002-2007, by the Australian Antarctic Division and 31: * Contributors. 32: * 33: * Original Author: Bryan Scott (for the Australian Antarctic Division); 34: * Contributor(s): David Gilbert (for Object Refinery Limited); 35: * 36: * Changes: 37: * -------- 38: * 25-Sep-2002 : Version 1, contributed by Bryan Scott (DG); 39: * 27-Mar-2003 : Implemented Serializable (DG); 40: * 09-Sep-2003 : Added equals() method (DG); 41: * 08-Jun-2005 : Implemented Cloneable (DG); 42: * 22-Nov-2007 : Implemented hashCode() (DG); 43: * 44: */ 45: 46: package org.jfree.chart.needle; 47: 48: import java.awt.Graphics2D; 49: import java.awt.geom.Arc2D; 50: import java.awt.geom.GeneralPath; 51: import java.awt.geom.Point2D; 52: import java.awt.geom.Rectangle2D; 53: import java.io.Serializable; 54: 55: /** 56: * A needle in the shape of a ship, for use with the 57: * {@link org.jfree.chart.plot.CompassPlot} class. 58: */ 59: public class ShipNeedle extends MeterNeedle 60: implements Cloneable, Serializable { 61: 62: /** For serialization. */ 63: private static final long serialVersionUID = 149554868169435612L; 64: 65: /** 66: * Draws the needle. 67: * 68: * @param g2 the graphics device. 69: * @param plotArea the plot area. 70: * @param rotate the rotation point. 71: * @param angle the angle. 72: */ 73: protected void drawNeedle(Graphics2D g2, Rectangle2D plotArea, 74: Point2D rotate, double angle) { 75: 76: GeneralPath shape = new GeneralPath(); 77: shape.append(new Arc2D.Double(-9.0, -7.0, 10, 14, 0.0, 25.5, 78: Arc2D.OPEN), true); 79: shape.append(new Arc2D.Double(0.0, -7.0, 10, 14, 154.5, 25.5, 80: Arc2D.OPEN), true); 81: shape.closePath(); 82: getTransform().setToTranslation(plotArea.getMinX(), plotArea.getMaxY()); 83: getTransform().scale(plotArea.getWidth(), plotArea.getHeight() / 3); 84: shape.transform(getTransform()); 85: 86: if ((rotate != null) && (angle != 0)) { 87: /// we have rotation 88: getTransform().setToRotation(angle, rotate.getX(), rotate.getY()); 89: shape.transform(getTransform()); 90: } 91: 92: defaultDisplay(g2, shape); 93: } 94: 95: /** 96: * Tests another object for equality with this object. 97: * 98: * @param object the object to test. 99: * 100: * @return A boolean. 101: */ 102: public boolean equals(Object object) { 103: if (object == null) { 104: return false; 105: } 106: if (object == this) { 107: return true; 108: } 109: if (super.equals(object) && object instanceof ShipNeedle) { 110: return true; 111: } 112: return false; 113: } 114: 115: /** 116: * Returns a hash code for this instance. 117: * 118: * @return A hash code. 119: */ 120: public int hashCode() { 121: return super.hashCode(); 122: } 123: 124: /** 125: * Returns a clone of this needle. 126: * 127: * @return A clone. 128: * 129: * @throws CloneNotSupportedException if the <code>ShipNeedle</code> 130: * cannot be cloned (in theory, this should not happen). 131: */ 132: public Object clone() throws CloneNotSupportedException { 133: return super.clone(); 134: } 135: 136: } 137: