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 * WindNeedle.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: WindNeedle.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 * 09-Sep-2003 : Added equals() method (DG); 042 * 043 */ 044 045 package org.jfree.chart.needle; 046 047 import java.awt.Graphics2D; 048 import java.awt.geom.Point2D; 049 import java.awt.geom.Rectangle2D; 050 import java.io.Serializable; 051 052 /** 053 * A needle that indicates wind direction, for use with the 054 * {@link org.jfree.chart.plot.CompassPlot} class. 055 * 056 * @author Bryan Scott 057 */ 058 public class WindNeedle extends ArrowNeedle 059 implements Cloneable, Serializable { 060 061 /** For serialization. */ 062 private static final long serialVersionUID = -2861061368907167834L; 063 064 /** 065 * Default constructor. 066 */ 067 public WindNeedle() { 068 super(false); // isArrowAtTop 069 } 070 071 /** 072 * Draws the needle. 073 * 074 * @param g2 the graphics device. 075 * @param plotArea the plot area. 076 * @param rotate the rotation point. 077 * @param angle the angle. 078 */ 079 protected void drawNeedle(Graphics2D g2, Rectangle2D plotArea, 080 Point2D rotate, double angle) { 081 082 super.drawNeedle(g2, plotArea, rotate, angle); 083 if ((rotate != null) && (plotArea != null)) { 084 085 int spacing = getSize() * 3; 086 Rectangle2D newArea = new Rectangle2D.Double(); 087 088 Point2D newRotate = rotate; 089 newArea.setRect( 090 plotArea.getMinX() - spacing, plotArea.getMinY(), 091 plotArea.getWidth(), plotArea.getHeight() 092 ); 093 super.drawNeedle(g2, newArea, newRotate, angle); 094 095 newArea.setRect( 096 plotArea.getMinX() + spacing, plotArea.getMinY(), 097 plotArea.getWidth(), plotArea.getHeight() 098 ); 099 super.drawNeedle(g2, newArea, newRotate, angle); 100 101 } 102 } 103 104 /** 105 * Tests another object for equality with this object. 106 * 107 * @param object the object to test. 108 * 109 * @return A boolean. 110 */ 111 public boolean equals(Object object) { 112 if (object == null) { 113 return false; 114 } 115 if (object == this) { 116 return true; 117 } 118 if (super.equals(object) && object instanceof WindNeedle) { 119 return true; 120 } 121 return false; 122 } 123 124 } 125