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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: * WindNeedle.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: * 09-Sep-2003 : Added equals() method (DG); 40: * 22-Nov-2007 : Implemented hashCode() (DG) 41: * 42: */ 43: 44: package org.jfree.chart.needle; 45: 46: import java.awt.Graphics2D; 47: import java.awt.geom.Point2D; 48: import java.awt.geom.Rectangle2D; 49: import java.io.Serializable; 50: 51: /** 52: * A needle that indicates wind direction, for use with the 53: * {@link org.jfree.chart.plot.CompassPlot} class. 54: */ 55: public class WindNeedle extends ArrowNeedle 56: implements Cloneable, Serializable { 57: 58: /** For serialization. */ 59: private static final long serialVersionUID = -2861061368907167834L; 60: 61: /** 62: * Default constructor. 63: */ 64: public WindNeedle() { 65: super(false); // isArrowAtTop 66: } 67: 68: /** 69: * Draws the needle. 70: * 71: * @param g2 the graphics device. 72: * @param plotArea the plot area. 73: * @param rotate the rotation point. 74: * @param angle the angle. 75: */ 76: protected void drawNeedle(Graphics2D g2, Rectangle2D plotArea, 77: Point2D rotate, double angle) { 78: 79: super.drawNeedle(g2, plotArea, rotate, angle); 80: if ((rotate != null) && (plotArea != null)) { 81: 82: int spacing = getSize() * 3; 83: Rectangle2D newArea = new Rectangle2D.Double(); 84: 85: Point2D newRotate = rotate; 86: newArea.setRect(plotArea.getMinX() - spacing, plotArea.getMinY(), 87: plotArea.getWidth(), plotArea.getHeight()); 88: super.drawNeedle(g2, newArea, newRotate, angle); 89: 90: newArea.setRect(plotArea.getMinX() + spacing, 91: plotArea.getMinY(), plotArea.getWidth(), 92: plotArea.getHeight()); 93: super.drawNeedle(g2, newArea, newRotate, angle); 94: 95: } 96: } 97: 98: /** 99: * Tests another object for equality with this object. 100: * 101: * @param object the object to test. 102: * 103: * @return A boolean. 104: */ 105: public boolean equals(Object object) { 106: if (object == null) { 107: return false; 108: } 109: if (object == this) { 110: return true; 111: } 112: if (super.equals(object) && object instanceof WindNeedle) { 113: return true; 114: } 115: return false; 116: } 117: 118: /** 119: * Returns a hash code for this instance. 120: * 121: * @return A hash code. 122: */ 123: public int hashCode() { 124: return super.hashCode(); 125: } 126: 127: } 128: