contourtooltipgenerator.java

来自「JfreeChart 常用图表例子」· Java 代码 · 共 65 行

/* ===========================================================
 * JFreeChart : a free chart library for the Java(tm) platform
 * ===========================================================
 *
 * (C) Copyright 2000-2005, 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.]
 *
 * ----------------------------
 * ContourToolTipGenerator.java
 * ----------------------------
 * (C) Copyright 2002, 2003, by David M. O'Donnell and Contributors.
 *
 * Original Author:  David M. O'Donnell;
 * Contributor(s):   David Gilbert (for Object Refinery Limited);
 *
 * $Id: ContourToolTipGenerator.java,v 1.2 2005/03/29 12:54:54 mungady Exp $
 *
 * Changes
 * -------
 * 23-Jan-2003 : Added standard header (DG);
 *
 */

package org.jfree.chart.labels;

import org.jfree.data.contour.ContourDataset;

/**
 * Interface for a tooltip generator for plots that use data from a 
 * {@link ContourDataset}.
 *
 * @author David M. O'Donnell
 */
public interface ContourToolTipGenerator {

    /**
     * Generates a tooltip text item for a particular item within a series.
     *
     * @param dataset  the dataset.
     * @param item  the item index (zero-based).
     *
     * @return The tooltip text.
     */
    public String generateToolTip(ContourDataset dataset, int item);

}