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     * ContourToolTipGenerator.java
029     * ----------------------------
030     * (C) Copyright 2002, 2003, 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: ContourToolTipGenerator.java,v 1.2.2.1 2005/10/25 20:49:02 mungady Exp $
036     *
037     * Changes
038     * -------
039     * 23-Jan-2003 : Added standard header (DG);
040     *
041     */
042    
043    package org.jfree.chart.labels;
044    
045    import org.jfree.data.contour.ContourDataset;
046    
047    /**
048     * Interface for a tooltip generator for plots that use data from a 
049     * {@link ContourDataset}.
050     *
051     * @author David M. O'Donnell
052     */
053    public interface ContourToolTipGenerator {
054    
055        /**
056         * Generates a tooltip text item for a particular item within a series.
057         *
058         * @param dataset  the dataset.
059         * @param item  the item index (zero-based).
060         *
061         * @return The tooltip text.
062         */
063        public String generateToolTip(ContourDataset dataset, int item);
064    
065    }