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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: * ColorBlock.java 29: * --------------- 30: * (C) Copyright 2004, 2007, by Object Refinery Limited. 31: * 32: * Original Author: David Gilbert (for Object Refinery Limited); 33: * Contributor(s): -; 34: * 35: * Changes: 36: * -------- 37: * 22-Oct-2004 : Version 1 (DG); 38: * 20-Apr-2005 : Added new draw() method (DG); 39: * ------------- JFREECHART 1.0.x --------------------------------------------- 40: * 16-Mar-2007 : Implemented equals() and fixed serialization (DG); 41: * 42: */ 43: 44: package org.jfree.chart.block; 45: 46: import java.awt.Graphics2D; 47: import java.awt.Paint; 48: import java.awt.geom.Rectangle2D; 49: import java.io.IOException; 50: import java.io.ObjectInputStream; 51: import java.io.ObjectOutputStream; 52: 53: import org.jfree.io.SerialUtilities; 54: import org.jfree.util.PaintUtilities; 55: 56: /** 57: * A block that is filled with a single color. 58: */ 59: public class ColorBlock extends AbstractBlock implements Block { 60: 61: /** For serialization. */ 62: static final long serialVersionUID = 3383866145634010865L; 63: 64: /** The paint. */ 65: private transient Paint paint; 66: 67: /** 68: * Creates a new block. 69: * 70: * @param paint the paint (<code>null</code> not permitted). 71: * @param width the width. 72: * @param height the height. 73: */ 74: public ColorBlock(Paint paint, double width, double height) { 75: if (paint == null) { 76: throw new IllegalArgumentException("Null 'paint' argument."); 77: } 78: this.paint = paint; 79: setWidth(width); 80: setHeight(height); 81: } 82: 83: /** 84: * Returns the paint. 85: * 86: * @return The paint (never <code>null</code>). 87: * 88: * @since 1.0.5 89: */ 90: public Paint getPaint() { 91: return this.paint; 92: } 93: 94: /** 95: * Draws the block. 96: * 97: * @param g2 the graphics device. 98: * @param area the area. 99: */ 100: public void draw(Graphics2D g2, Rectangle2D area) { 101: Rectangle2D bounds = getBounds(); 102: g2.setPaint(this.paint); 103: g2.fill(bounds); 104: } 105: 106: /** 107: * Draws the block within the specified area. 108: * 109: * @param g2 the graphics device. 110: * @param area the area. 111: * @param params ignored (<code>null</code> permitted). 112: * 113: * @return Always <code>null</code>. 114: */ 115: public Object draw(Graphics2D g2, Rectangle2D area, Object params) { 116: draw(g2, area); 117: return null; 118: } 119: 120: /** 121: * Tests this block for equality with an arbitrary object. 122: * 123: * @param obj the object (<code>null</code> permitted). 124: * 125: * @return A boolean. 126: */ 127: public boolean equals(Object obj) { 128: if (obj == this) { 129: return true; 130: } 131: if (!(obj instanceof ColorBlock)) { 132: return false; 133: } 134: ColorBlock that = (ColorBlock) obj; 135: if (!PaintUtilities.equal(this.paint, that.paint)) { 136: return false; 137: } 138: return super.equals(obj); 139: } 140: 141: /** 142: * Provides serialization support. 143: * 144: * @param stream the output stream. 145: * 146: * @throws IOException if there is an I/O error. 147: */ 148: private void writeObject(ObjectOutputStream stream) throws IOException { 149: stream.defaultWriteObject(); 150: SerialUtilities.writePaint(this.paint, stream); 151: } 152: 153: /** 154: * Provides serialization support. 155: * 156: * @param stream the input stream. 157: * 158: * @throws IOException if there is an I/O error. 159: * @throws ClassNotFoundException if there is a classpath problem. 160: */ 161: private void readObject(ObjectInputStream stream) 162: throws IOException, ClassNotFoundException { 163: stream.defaultReadObject(); 164: this.paint = SerialUtilities.readPaint(stream); 165: } 166: 167: }