/* ===========================================================

 * 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.]

 *

 * -------------------------

 * ContourPlotUtilities.java

 * -------------------------

 * (C) Copyright 2002-2004, by David M. O'Donnell and Contributors.

 *

 * Original Author:  David M. O'Donnell;

 * Contributor(s):   David Gilbert (for Object Refinery Limited);

 *

 * $Id: ContourPlotUtilities.java,v 1.1 2004/08/31 14:39:21 mungady Exp $

 *

 * Changes

 * -------

 * 26-Nov-2002 : Version 1 contributed by David M. O'Donnell (DG);

 * 22-Jul-2003 : Made this class abstract as there is no need to instantiate it (DG);

 *

 */



package org.jfree.chart.plot;



import org.jfree.data.Range;

import org.jfree.data.contour.ContourDataset;

import org.jfree.data.contour.DefaultContourDataset;



/**

 * Some utility methods for the {@link ContourPlot} class.

 *

 * @author David M. O'Donnell

 */

public abstract class ContourPlotUtilities {



    /**

     * Returns the visible z-range.

     *

     * @param data  the dataset.

     * @param x  the x range.

     * @param y  the y range.

     *

     * @return The range.

     */

    public static Range visibleRange(ContourDataset data, Range x, Range y) {

        Range range = null;

        range = ((DefaultContourDataset) data).getZValueRange(x, y);

        return range;

    }



}

