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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: * 43: */ 44: 45: package org.jfree.chart.needle; 46: 47: import java.awt.Graphics2D; 48: import java.awt.geom.Arc2D; 49: import java.awt.geom.GeneralPath; 50: import java.awt.geom.Point2D; 51: import java.awt.geom.Rectangle2D; 52: import java.io.Serializable; 53: 54: /** 55: * A needle in the shape of a ship, for use with the 56: * {@link org.jfree.chart.plot.CompassPlot} class. 57: */ 58: public class ShipNeedle extends MeterNeedle 59: implements Cloneable, Serializable { 60: 61: /** For serialization. */ 62: private static final long serialVersionUID = 149554868169435612L; 63: 64: /** 65: * Draws the needle. 66: * 67: * @param g2 the graphics device. 68: * @param plotArea the plot area. 69: * @param rotate the rotation point. 70: * @param angle the angle. 71: */ 72: protected void drawNeedle(Graphics2D g2, Rectangle2D plotArea, 73: Point2D rotate, double angle) { 74: 75: GeneralPath shape = new GeneralPath(); 76: shape.append(new Arc2D.Double(-9.0, -7.0, 10, 14, 0.0, 25.5, 77: Arc2D.OPEN), true); 78: shape.append(new Arc2D.Double(0.0, -7.0, 10, 14, 154.5, 25.5, 79: Arc2D.OPEN), true); 80: shape.closePath(); 81: getTransform().setToTranslation(plotArea.getMinX(), plotArea.getMaxY()); 82: getTransform().scale(plotArea.getWidth(), plotArea.getHeight() / 3); 83: shape.transform(getTransform()); 84: 85: if ((rotate != null) && (angle != 0)) { 86: /// we have rotation 87: getTransform().setToRotation(angle, rotate.getX(), rotate.getY()); 88: shape.transform(getTransform()); 89: } 90: 91: defaultDisplay(g2, shape); 92: } 93: 94: /** 95: * Tests another object for equality with this object. 96: * 97: * @param object the object to test. 98: * 99: * @return A boolean. 100: */ 101: public boolean equals(Object object) { 102: if (object == null) { 103: return false; 104: } 105: if (object == this) { 106: return true; 107: } 108: if (super.equals(object) && object instanceof ShipNeedle) { 109: return true; 110: } 111: return false; 112: } 113: 114: /** 115: * Returns a clone of this needle. 116: * 117: * @return A clone. 118: * 119: * @throws CloneNotSupportedException if the <code>ShipNeedle</code> 120: * cannot be cloned (in theory, this should not happen). 121: */ 122: public Object clone() throws CloneNotSupportedException { 123: return super.clone(); 124: } 125: 126: } 127: