/* ===========================================================
 * JFreeChart : a free chart library for the Java(tm) platform
 * ===========================================================
 *
 * (C) Copyright 2000-2004, by Object Refinery Limited and Contributors.
 *
 * Project Info:  http://www.jfree.org/jfreechart/index.html
 *
 * This library is free software; you can redistribute it and/or modify it under the terms
 * of the GNU Lesser General Public License as published by the Free Software Foundation;
 * either version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
 * without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 * See the GNU Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License along with this
 * library; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
 * Boston, MA 02111-1307, USA.
 *
 * [Java is a trademark or registered trademark of Sun Microsystems, Inc. 
 * in the United States and other countries.]
 *
 * -------------------
 * NumberTickUnit.java
 * -------------------
 * (C) Copyright 2001-2004, by Object Refinery Limited.
 *
 * Original Author:  David Gilbert (for Object Refinery Limited);
 * Contributor(s):   -;
 *
 * $Id: NumberTickUnit.java,v 1.4 2004/01/03 04:11:57 mungady Exp $
 *
 * Changes (from 19-Dec-2001)
 * --------------------------
 * 19-Dec-2001 : Added standard header (DG);
 * 01-May-2002 : Updated for changed to TickUnit class (DG);
 * 01-Oct-2002 : Fixed errors reported by Checkstyle (DG);
 * 08-Nov-2002 : Moved to new package com.jrefinery.chart.axis (DG);
 * 09-Jan-2002 : Added a new constructor (DG);
 * 26-Mar-2003 : Implemented Serializable (DG);
 *
 */

package org.jfree.chart.axis;

import java.io.Serializable;
import java.text.NumberFormat;

/**
 * A numerical tick unit.
 *
 * @author David Gilbert
 */
public class NumberTickUnit extends TickUnit implements Serializable {

    /** A formatter for the tick unit. */
    private NumberFormat formatter;

    /**
     * Creates a new number tick unit.
     *
     * @param size  the size of the tick unit.
     */
    public NumberTickUnit(double size) {
        this(size, NumberFormat.getNumberInstance());
    }

    /**
     * Creates a new number tick unit.
     *
     * @param size  the size of the tick unit.
     * @param formatter  a number formatter for the tick unit.
     */
    public NumberTickUnit(double size, NumberFormat formatter) {
        super(size);
        this.formatter = formatter;
    }

    /**
     * Converts a value to a string.
     *
     * @param value  the value.
     *
     * @return the formatted string.
     */
    public String valueToString(double value) {
        return formatter.format(value);
    }

}
