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 * LongNeedle.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: LongNeedle.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 * 16-Mar-2004 : Implemented Rotation 044 */ 045 046 package org.jfree.chart.needle; 047 048 import java.awt.Graphics2D; 049 import java.awt.geom.GeneralPath; 050 import java.awt.geom.Point2D; 051 import java.awt.geom.Rectangle2D; 052 import java.awt.Shape; 053 import java.io.Serializable; 054 055 /** 056 * A needle that is represented by a long line. 057 * 058 * @author Bryan Scott 059 */ 060 public class LongNeedle extends MeterNeedle 061 implements Cloneable, Serializable { 062 063 /** For serialization. */ 064 private static final long serialVersionUID = -4319985779783688159L; 065 066 /** 067 * Default constructor. 068 */ 069 public LongNeedle() { 070 super(); 071 setRotateY(0.8); 072 } 073 074 /** 075 * Draws the needle. 076 * 077 * @param g2 the graphics device. 078 * @param plotArea the plot area. 079 * @param rotate the rotation point. 080 * @param angle the angle. 081 */ 082 protected void drawNeedle(Graphics2D g2, Rectangle2D plotArea, 083 Point2D rotate, double angle) { 084 085 GeneralPath shape1 = new GeneralPath(); 086 GeneralPath shape2 = new GeneralPath(); 087 GeneralPath shape3 = new GeneralPath(); 088 089 float minX = (float) plotArea.getMinX(); 090 float minY = (float) plotArea.getMinY(); 091 float maxX = (float) plotArea.getMaxX(); 092 float maxY = (float) plotArea.getMaxY(); 093 //float midX = (float) (minX + (plotArea.getWidth() * getRotateX())); 094 //float midY = (float) (minY + (plotArea.getHeight() * getRotateY())); 095 float midX = (float) (minX + (plotArea.getWidth() * 0.5)); 096 float midY = (float) (minY + (plotArea.getHeight() * 0.8)); 097 float y = maxY - (2 * (maxY - midY)); 098 if (y < minY) { 099 y = minY; 100 } 101 shape1.moveTo(minX, midY); 102 shape1.lineTo(midX, minY); 103 shape1.lineTo(midX, y); 104 shape1.closePath(); 105 106 shape2.moveTo(maxX, midY); 107 shape2.lineTo(midX, minY); 108 shape2.lineTo(midX, y); 109 shape2.closePath(); 110 111 shape3.moveTo(minX, midY); 112 shape3.lineTo(midX, maxY); 113 shape3.lineTo(maxX, midY); 114 shape3.lineTo(midX, y); 115 shape3.closePath(); 116 117 Shape s1 = shape1; 118 Shape s2 = shape2; 119 Shape s3 = shape3; 120 121 if ((rotate != null) && (angle != 0)) { 122 /// we have rotation huston, please spin me 123 getTransform().setToRotation(angle, rotate.getX(), rotate.getY()); 124 s1 = shape1.createTransformedShape(transform); 125 s2 = shape2.createTransformedShape(transform); 126 s3 = shape3.createTransformedShape(transform); 127 } 128 129 130 if (getHighlightPaint() != null) { 131 g2.setPaint(getHighlightPaint()); 132 g2.fill(s3); 133 } 134 135 if (getFillPaint() != null) { 136 g2.setPaint(getFillPaint()); 137 g2.fill(s1); 138 g2.fill(s2); 139 } 140 141 142 if (getOutlinePaint() != null) { 143 g2.setStroke(getOutlineStroke()); 144 g2.setPaint(getOutlinePaint()); 145 g2.draw(s1); 146 g2.draw(s2); 147 g2.draw(s3); 148 } 149 } 150 151 /** 152 * Tests another object for equality with this object. 153 * 154 * @param obj the object to test (<code>null</code> permitted). 155 * 156 * @return A boolean. 157 */ 158 public boolean equals(Object obj) { 159 if (obj == this) { 160 return true; 161 } 162 if (!(obj instanceof LongNeedle)) { 163 return false; 164 } 165 if (!super.equals(obj)) { 166 return false; 167 } 168 return true; 169 } 170 171 /** 172 * Returns a clone of this needle. 173 * 174 * @return A clone. 175 */ 176 public Object clone() throws CloneNotSupportedException { 177 return super.clone(); 178 } 179 180 }