001 /* =========================================================== 002 * JFreeChart : a free chart library for the Java(tm) platform 003 * =========================================================== 004 * 005 * (C) Copyright 2000-2006, 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 2002-2006, 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 1.4.2.3 2006/08/02 10:40:57 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 public class WindNeedle extends ArrowNeedle 057 implements Cloneable, Serializable { 058 059 /** For serialization. */ 060 private static final long serialVersionUID = -2861061368907167834L; 061 062 /** 063 * Default constructor. 064 */ 065 public WindNeedle() { 066 super(false); // isArrowAtTop 067 } 068 069 /** 070 * Draws the needle. 071 * 072 * @param g2 the graphics device. 073 * @param plotArea the plot area. 074 * @param rotate the rotation point. 075 * @param angle the angle. 076 */ 077 protected void drawNeedle(Graphics2D g2, Rectangle2D plotArea, 078 Point2D rotate, double angle) { 079 080 super.drawNeedle(g2, plotArea, rotate, angle); 081 if ((rotate != null) && (plotArea != null)) { 082 083 int spacing = getSize() * 3; 084 Rectangle2D newArea = new Rectangle2D.Double(); 085 086 Point2D newRotate = rotate; 087 newArea.setRect(plotArea.getMinX() - spacing, plotArea.getMinY(), 088 plotArea.getWidth(), plotArea.getHeight()); 089 super.drawNeedle(g2, newArea, newRotate, angle); 090 091 newArea.setRect(plotArea.getMinX() + spacing, 092 plotArea.getMinY(), plotArea.getWidth(), 093 plotArea.getHeight()); 094 super.drawNeedle(g2, newArea, newRotate, angle); 095 096 } 097 } 098 099 /** 100 * Tests another object for equality with this object. 101 * 102 * @param object the object to test. 103 * 104 * @return A boolean. 105 */ 106 public boolean equals(Object object) { 107 if (object == null) { 108 return false; 109 } 110 if (object == this) { 111 return true; 112 } 113 if (super.equals(object) && object instanceof WindNeedle) { 114 return true; 115 } 116 return false; 117 } 118 119 } 120