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 * PinNeedle.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: PinNeedle.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 * 27-Mar-2003 : Implemented Serializable (DG); 042 * 09-Sep-2003 : Added equals() method (DG); 043 * 08-Jun-2005 : Implemented Cloneable (DG); 044 * 045 */ 046 047 package org.jfree.chart.needle; 048 049 import java.awt.Graphics2D; 050 import java.awt.geom.Area; 051 import java.awt.geom.Ellipse2D; 052 import java.awt.geom.GeneralPath; 053 import java.awt.geom.Point2D; 054 import java.awt.geom.Rectangle2D; 055 import java.io.Serializable; 056 057 /** 058 * A needle that is drawn as a pin shape. 059 * 060 * @author Bryan Scott 061 */ 062 public class PinNeedle extends MeterNeedle 063 implements Cloneable, Serializable { 064 065 /** For serialization. */ 066 private static final long serialVersionUID = -3787089953079863373L; 067 068 /** 069 * Draws the needle. 070 * 071 * @param g2 the graphics device. 072 * @param plotArea the plot area. 073 * @param rotate the rotation point. 074 * @param angle the angle. 075 */ 076 protected void drawNeedle(Graphics2D g2, Rectangle2D plotArea, 077 Point2D rotate, double angle) { 078 079 Area shape; 080 GeneralPath pointer = new GeneralPath(); 081 082 int minY = (int) (plotArea.getMinY()); 083 //int maxX = (int) (plotArea.getMaxX()); 084 int maxY = (int) (plotArea.getMaxY()); 085 int midX = (int) (plotArea.getMinX() + (plotArea.getWidth() / 2)); 086 //int midY = (int) (plotArea.getMinY() + (plotArea.getHeight() / 2)); 087 int lenX = (int) (plotArea.getWidth() / 10); 088 if (lenX < 2) { 089 lenX = 2; 090 } 091 092 pointer.moveTo(midX - lenX, maxY - lenX); 093 pointer.lineTo(midX + lenX, maxY - lenX); 094 pointer.lineTo(midX, minY + lenX); 095 pointer.closePath(); 096 097 lenX = 4 * lenX; 098 Ellipse2D circle = new Ellipse2D.Double( 099 midX - lenX / 2, plotArea.getMaxY() - lenX, lenX, lenX 100 ); 101 102 shape = new Area(circle); 103 shape.add(new Area(pointer)); 104 if ((rotate != null) && (angle != 0)) { 105 /// we have rotation 106 getTransform().setToRotation(angle, rotate.getX(), rotate.getY()); 107 shape.transform(getTransform()); 108 } 109 110 defaultDisplay(g2, shape); 111 112 } 113 114 /** 115 * Tests another object for equality with this object. 116 * 117 * @param obj the object to test (<code>null</code> permitted). 118 * 119 * @return A boolean. 120 */ 121 public boolean equals(Object obj) { 122 if (obj == this) { 123 return true; 124 } 125 if (!(obj instanceof PinNeedle)) { 126 return false; 127 } 128 if (!super.equals(obj)) { 129 return false; 130 } 131 return true; 132 } 133 134 /** 135 * Returns a clone of this needle. 136 * 137 * @return A clone. 138 */ 139 public Object clone() throws CloneNotSupportedException { 140 return super.clone(); 141 } 142 143 }