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1: /* =========================================================== 2: * JFreeChart : a free chart library for the Java(tm) platform 3: * =========================================================== 4: * 5: * (C) Copyright 2000-2006, 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: * LongNeedle.java 29: * --------------- 30: * (C) Copyright 2002-2006, 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: * $Id: LongNeedle.java,v 1.4.2.3 2006/08/02 10:40:57 mungady Exp $ 37: * 38: * Changes: 39: * -------- 40: * 25-Sep-2002 : Version 1, contributed by Bryan Scott (DG); 41: * 27-Mar-2003 : Implemented Serializable (DG); 42: * 09-Sep-2003 : Added equals() method (DG); 43: * 16-Mar-2004 : Implemented Rotation 44: */ 45: 46: package org.jfree.chart.needle; 47: 48: import java.awt.Graphics2D; 49: import java.awt.geom.GeneralPath; 50: import java.awt.geom.Point2D; 51: import java.awt.geom.Rectangle2D; 52: import java.awt.Shape; 53: import java.io.Serializable; 54: 55: /** 56: * A needle that is represented by a long line. 57: */ 58: public class LongNeedle extends MeterNeedle 59: implements Cloneable, Serializable { 60: 61: /** For serialization. */ 62: private static final long serialVersionUID = -4319985779783688159L; 63: 64: /** 65: * Default constructor. 66: */ 67: public LongNeedle() { 68: super(); 69: setRotateY(0.8); 70: } 71: 72: /** 73: * Draws the needle. 74: * 75: * @param g2 the graphics device. 76: * @param plotArea the plot area. 77: * @param rotate the rotation point. 78: * @param angle the angle. 79: */ 80: protected void drawNeedle(Graphics2D g2, Rectangle2D plotArea, 81: Point2D rotate, double angle) { 82: 83: GeneralPath shape1 = new GeneralPath(); 84: GeneralPath shape2 = new GeneralPath(); 85: GeneralPath shape3 = new GeneralPath(); 86: 87: float minX = (float) plotArea.getMinX(); 88: float minY = (float) plotArea.getMinY(); 89: float maxX = (float) plotArea.getMaxX(); 90: float maxY = (float) plotArea.getMaxY(); 91: //float midX = (float) (minX + (plotArea.getWidth() * getRotateX())); 92: //float midY = (float) (minY + (plotArea.getHeight() * getRotateY())); 93: float midX = (float) (minX + (plotArea.getWidth() * 0.5)); 94: float midY = (float) (minY + (plotArea.getHeight() * 0.8)); 95: float y = maxY - (2 * (maxY - midY)); 96: if (y < minY) { 97: y = minY; 98: } 99: shape1.moveTo(minX, midY); 100: shape1.lineTo(midX, minY); 101: shape1.lineTo(midX, y); 102: shape1.closePath(); 103: 104: shape2.moveTo(maxX, midY); 105: shape2.lineTo(midX, minY); 106: shape2.lineTo(midX, y); 107: shape2.closePath(); 108: 109: shape3.moveTo(minX, midY); 110: shape3.lineTo(midX, maxY); 111: shape3.lineTo(maxX, midY); 112: shape3.lineTo(midX, y); 113: shape3.closePath(); 114: 115: Shape s1 = shape1; 116: Shape s2 = shape2; 117: Shape s3 = shape3; 118: 119: if ((rotate != null) && (angle != 0)) { 120: /// we have rotation huston, please spin me 121: getTransform().setToRotation(angle, rotate.getX(), rotate.getY()); 122: s1 = shape1.createTransformedShape(transform); 123: s2 = shape2.createTransformedShape(transform); 124: s3 = shape3.createTransformedShape(transform); 125: } 126: 127: 128: if (getHighlightPaint() != null) { 129: g2.setPaint(getHighlightPaint()); 130: g2.fill(s3); 131: } 132: 133: if (getFillPaint() != null) { 134: g2.setPaint(getFillPaint()); 135: g2.fill(s1); 136: g2.fill(s2); 137: } 138: 139: 140: if (getOutlinePaint() != null) { 141: g2.setStroke(getOutlineStroke()); 142: g2.setPaint(getOutlinePaint()); 143: g2.draw(s1); 144: g2.draw(s2); 145: g2.draw(s3); 146: } 147: } 148: 149: /** 150: * Tests another object for equality with this object. 151: * 152: * @param obj the object to test (<code>null</code> permitted). 153: * 154: * @return A boolean. 155: */ 156: public boolean equals(Object obj) { 157: if (obj == this) { 158: return true; 159: } 160: if (!(obj instanceof LongNeedle)) { 161: return false; 162: } 163: if (!super.equals(obj)) { 164: return false; 165: } 166: return true; 167: } 168: 169: /** 170: * Returns a clone of this needle. 171: * 172: * @return A clone. 173: * 174: * @throws CloneNotSupportedException if the <code>LongNeedle</code> 175: * cannot be cloned (in theory, this should not happen). 176: */ 177: public Object clone() throws CloneNotSupportedException { 178: return super.clone(); 179: } 180: 181: }