001    /* ===========================================================
002     * JFreeChart : a free chart library for the Java(tm) platform
003     * ===========================================================
004     *
005     * (C) Copyright 2000-2005, by Object Refinery Limited and Contributors.
006     *
007     * Project Info:  http://www.jfree.org/jfreechart/index.html
008     *
009     * This library is free software; you can redistribute it and/or modify it 
010     * under the terms of the GNU Lesser General Public License as published by 
011     * the Free Software Foundation; either version 2.1 of the License, or 
012     * (at your option) any later version.
013     *
014     * This library is distributed in the hope that it will be useful, but 
015     * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY 
016     * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public 
017     * License for more details.
018     *
019     * You should have received a copy of the GNU Lesser General Public
020     * License along with this library; if not, write to the Free Software
021     * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, 
022     * USA.  
023     *
024     * [Java is a trademark or registered trademark of Sun Microsystems, Inc. 
025     * in the United States and other countries.]
026     *
027     * ----------------
028     * GreyPalette.java
029     * ----------------
030     * (C) Copyright 2002-2005, by David M. O'Donnell and Contributors.
031     *
032     * Original Author:  David M. O'Donnell;
033     * Contributor(s):   David Gilbert (for Object Refinery Limited);
034     *
035     * $Id: GreyPalette.java,v 1.1.2.1 2005/11/24 16:11:49 mungady Exp $
036     *
037     * Changes
038     * -------
039     * 26-Nov-2002 : Version 1 contributed by David M. O'Donnell (DG);
040     * 26-Mar-2003 : Implemented Serializable (DG);
041     *
042     */
043    
044    package org.jfree.chart.plot;
045    
046    import java.io.Serializable;
047    
048    
049    /**
050     * A grey color palette.
051     *
052     * @author David M. O'Donnell.
053     */
054    public class GreyPalette extends ColorPalette implements Serializable {
055    
056        /** For serialization. */
057        private static final long serialVersionUID = -2120941170159987395L;
058        
059        /**
060         * Creates a new palette.
061         */
062        public GreyPalette() {
063            super();
064            initialize();
065        }
066    
067        /**
068         * Intializes the palette's indices.
069         */
070        public void initialize() {
071    
072            setPaletteName("Grey");
073    
074            this.r = new int[256];
075            this.g = new int[256];
076            this.b = new int[256];
077    
078            this.r[0] = 255;
079            this.g[0] = 255;
080            this.b[0] = 255;
081            this.r[1] = 0;
082            this.g[1] = 0;
083            this.b[1] = 0;
084    
085            for (int i = 2; i < 256; i++) {
086                this.r[i] = i;
087                this.g[i] = i;
088                this.b[i] = i;
089            }
090    
091        }
092    
093    }