/* ===========================================================
 
* JFreeChart : a free chart library for the Java(tm) platform
 
* ===========================================================
 
*
 
* (C) Copyright 2000-2016, 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., 51 Franklin Street, Fifth Floor, Boston, MA
  
02110-1301,
 
* USA.
 
*
 
* [Oracle and Java are registered trademarks of Oracle and/or its affiliates.
 
* Other names may be trademarks of their respective owners.]
 
*
 
* ------------------------
 
* PieToolTipGenerator.java
 
* ------------------------
 
* (C) Copyright 2001-2008, by Object Refinery Limited.
 
*
 
* Original Author:
  
David Gilbert (for Object Refinery Limited);
 
* Contributor(s):
   
-;
 
*
 
* Changes
 
* -------
 
* 15-Apr-2004 : Version 1, split from PieItemLabelGenerator (DG);
 
*
 
*/

package org.jfree.chart.labels;

import org.jfree.data.general.PieDataset;

/**
 
* A tool tip generator that is used by the
 
*
 
class.
 
*/
public interface PieToolTipGenerator {

    
/**
     
* Generates a tool tip text item for the specified item in the dataset.
     
* This method can return {@code null} to indicate that no tool tip
     
* should be displayed for an item.
     
*
     
* @param dataset
  
the dataset ({@code null} not permitted).
     
* @param key
  
the section key ({@code null} not permitted).
     
*
     
* @return The tool tip text (possibly {@code null}).
     
*/

    
public String generateToolTip(PieDataset dataset, Comparable key);

}