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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: * LineNeedle.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: * 27-Mar-2003 : Implemented Serializable (DG); 40: * 09-Sep-2003 : Added equals() method (DG); 41: * 08-Jun-2005 : Implemented Cloneable (DG); 42: * 22-Nov-2007 : Added hashCode() implementation (DG); 43: * 44: */ 45: 46: package org.jfree.chart.needle; 47: 48: import java.awt.Graphics2D; 49: import java.awt.Shape; 50: import java.awt.geom.Line2D; 51: import java.awt.geom.Point2D; 52: import java.awt.geom.Rectangle2D; 53: import java.io.Serializable; 54: 55: /** 56: * A needle that is represented by a line. 57: */ 58: public class LineNeedle extends MeterNeedle 59: implements Cloneable, Serializable { 60: 61: /** For serialization. */ 62: private static final long serialVersionUID = 6215321387896748945L; 63: 64: /** 65: * Draws the needle. 66: * 67: * @param g2 the graphics device. 68: * @param plotArea the plot area. 69: * @param rotate the rotation point. 70: * @param angle the angle. 71: */ 72: protected void drawNeedle(Graphics2D g2, Rectangle2D plotArea, 73: Point2D rotate, double angle) { 74: 75: Line2D shape = new Line2D.Double(); 76: 77: double x = plotArea.getMinX() + (plotArea.getWidth() / 2); 78: shape.setLine(x, plotArea.getMinY(), x, plotArea.getMaxY()); 79: 80: Shape s = shape; 81: 82: if ((rotate != null) && (angle != 0)) { 83: /// we have rotation 84: getTransform().setToRotation(angle, rotate.getX(), rotate.getY()); 85: s = getTransform().createTransformedShape(s); 86: } 87: 88: defaultDisplay(g2, s); 89: 90: } 91: 92: /** 93: * Tests another object for equality with this object. 94: * 95: * @param obj the object to test (<code>null</code> permitted). 96: * 97: * @return A boolean. 98: */ 99: public boolean equals(Object obj) { 100: if (obj == this) { 101: return true; 102: } 103: if (!(obj instanceof LineNeedle)) { 104: return false; 105: } 106: return super.equals(obj); 107: } 108: 109: /** 110: * Returns a hash code for this instance. 111: * 112: * @return A hash code. 113: */ 114: public int hashCode() { 115: return super.hashCode(); 116: } 117: 118: /** 119: * Returns a clone of this needle. 120: * 121: * @return A clone. 122: * 123: * @throws CloneNotSupportedException if the <code>LineNeedle</code> 124: * cannot be cloned (in theory, this should not happen). 125: */ 126: public Object clone() throws CloneNotSupportedException { 127: return super.clone(); 128: } 129: 130: } 131: