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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: * PinNeedle.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: * 43: */ 44: 45: package org.jfree.chart.needle; 46: 47: import java.awt.Graphics2D; 48: import java.awt.geom.Area; 49: import java.awt.geom.Ellipse2D; 50: import java.awt.geom.GeneralPath; 51: import java.awt.geom.Point2D; 52: import java.awt.geom.Rectangle2D; 53: import java.io.Serializable; 54: 55: /** 56: * A needle that is drawn as a pin shape. 57: */ 58: public class PinNeedle extends MeterNeedle 59: implements Cloneable, Serializable { 60: 61: /** For serialization. */ 62: private static final long serialVersionUID = -3787089953079863373L; 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: Area shape; 76: GeneralPath pointer = new GeneralPath(); 77: 78: int minY = (int) (plotArea.getMinY()); 79: //int maxX = (int) (plotArea.getMaxX()); 80: int maxY = (int) (plotArea.getMaxY()); 81: int midX = (int) (plotArea.getMinX() + (plotArea.getWidth() / 2)); 82: //int midY = (int) (plotArea.getMinY() + (plotArea.getHeight() / 2)); 83: int lenX = (int) (plotArea.getWidth() / 10); 84: if (lenX < 2) { 85: lenX = 2; 86: } 87: 88: pointer.moveTo(midX - lenX, maxY - lenX); 89: pointer.lineTo(midX + lenX, maxY - lenX); 90: pointer.lineTo(midX, minY + lenX); 91: pointer.closePath(); 92: 93: lenX = 4 * lenX; 94: Ellipse2D circle = new Ellipse2D.Double(midX - lenX / 2, 95: plotArea.getMaxY() - lenX, lenX, lenX); 96: 97: shape = new Area(circle); 98: shape.add(new Area(pointer)); 99: if ((rotate != null) && (angle != 0)) { 100: /// we have rotation 101: getTransform().setToRotation(angle, rotate.getX(), rotate.getY()); 102: shape.transform(getTransform()); 103: } 104: 105: defaultDisplay(g2, shape); 106: 107: } 108: 109: /** 110: * Tests another object for equality with this object. 111: * 112: * @param obj the object to test (<code>null</code> permitted). 113: * 114: * @return A boolean. 115: */ 116: public boolean equals(Object obj) { 117: if (obj == this) { 118: return true; 119: } 120: if (!(obj instanceof PinNeedle)) { 121: return false; 122: } 123: if (!super.equals(obj)) { 124: return false; 125: } 126: return true; 127: } 128: 129: /** 130: * Returns a clone of this needle. 131: * 132: * @return A clone. 133: * 134: * @throws CloneNotSupportedException if the <code>PinNeedle</code> 135: * cannot be cloned (in theory, this should not happen). 136: */ 137: public Object clone() throws CloneNotSupportedException { 138: return super.clone(); 139: } 140: 141: }