Frames | No Frames |
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: * LongNeedle.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: * 16-Mar-2004 : Implemented Rotation 42: */ 43: 44: package org.jfree.chart.needle; 45: 46: import java.awt.Graphics2D; 47: import java.awt.Shape; 48: import java.awt.geom.GeneralPath; 49: import java.awt.geom.Point2D; 50: import java.awt.geom.Rectangle2D; 51: import java.io.Serializable; 52: 53: /** 54: * A needle that is represented by a long line. 55: */ 56: public class LongNeedle extends MeterNeedle 57: implements Cloneable, Serializable { 58: 59: /** For serialization. */ 60: private static final long serialVersionUID = -4319985779783688159L; 61: 62: /** 63: * Default constructor. 64: */ 65: public LongNeedle() { 66: super(); 67: setRotateY(0.8); 68: } 69: 70: /** 71: * Draws the needle. 72: * 73: * @param g2 the graphics device. 74: * @param plotArea the plot area. 75: * @param rotate the rotation point. 76: * @param angle the angle. 77: */ 78: protected void drawNeedle(Graphics2D g2, Rectangle2D plotArea, 79: Point2D rotate, double angle) { 80: 81: GeneralPath shape1 = new GeneralPath(); 82: GeneralPath shape2 = new GeneralPath(); 83: GeneralPath shape3 = new GeneralPath(); 84: 85: float minX = (float) plotArea.getMinX(); 86: float minY = (float) plotArea.getMinY(); 87: float maxX = (float) plotArea.getMaxX(); 88: float maxY = (float) plotArea.getMaxY(); 89: //float midX = (float) (minX + (plotArea.getWidth() * getRotateX())); 90: //float midY = (float) (minY + (plotArea.getHeight() * getRotateY())); 91: float midX = (float) (minX + (plotArea.getWidth() * 0.5)); 92: float midY = (float) (minY + (plotArea.getHeight() * 0.8)); 93: float y = maxY - (2 * (maxY - midY)); 94: if (y < minY) { 95: y = minY; 96: } 97: shape1.moveTo(minX, midY); 98: shape1.lineTo(midX, minY); 99: shape1.lineTo(midX, y); 100: shape1.closePath(); 101: 102: shape2.moveTo(maxX, midY); 103: shape2.lineTo(midX, minY); 104: shape2.lineTo(midX, y); 105: shape2.closePath(); 106: 107: shape3.moveTo(minX, midY); 108: shape3.lineTo(midX, maxY); 109: shape3.lineTo(maxX, midY); 110: shape3.lineTo(midX, y); 111: shape3.closePath(); 112: 113: Shape s1 = shape1; 114: Shape s2 = shape2; 115: Shape s3 = shape3; 116: 117: if ((rotate != null) && (angle != 0)) { 118: /// we have rotation huston, please spin me 119: getTransform().setToRotation(angle, rotate.getX(), rotate.getY()); 120: s1 = shape1.createTransformedShape(transform); 121: s2 = shape2.createTransformedShape(transform); 122: s3 = shape3.createTransformedShape(transform); 123: } 124: 125: 126: if (getHighlightPaint() != null) { 127: g2.setPaint(getHighlightPaint()); 128: g2.fill(s3); 129: } 130: 131: if (getFillPaint() != null) { 132: g2.setPaint(getFillPaint()); 133: g2.fill(s1); 134: g2.fill(s2); 135: } 136: 137: 138: if (getOutlinePaint() != null) { 139: g2.setStroke(getOutlineStroke()); 140: g2.setPaint(getOutlinePaint()); 141: g2.draw(s1); 142: g2.draw(s2); 143: g2.draw(s3); 144: } 145: } 146: 147: /** 148: * Tests another object for equality with this object. 149: * 150: * @param obj the object to test (<code>null</code> permitted). 151: * 152: * @return A boolean. 153: */ 154: public boolean equals(Object obj) { 155: if (obj == this) { 156: return true; 157: } 158: if (!(obj instanceof LongNeedle)) { 159: return false; 160: } 161: if (!super.equals(obj)) { 162: return false; 163: } 164: return true; 165: } 166: 167: /** 168: * Returns a clone of this needle. 169: * 170: * @return A clone. 171: * 172: * @throws CloneNotSupportedException if the <code>LongNeedle</code> 173: * cannot be cloned (in theory, this should not happen). 174: */ 175: public Object clone() throws CloneNotSupportedException { 176: return super.clone(); 177: } 178: 179: }