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Java > Open Source Codes > org > jfree > chart > labels > XYToolTipGenerator


1 /* ===========================================================
2  * JFreeChart : a free chart library for the Java(tm) platform
3  * ===========================================================
4  *
5  * (C) Copyright 2000-2005, by Object Refinery Limited and Contributors.
6  *
7  * Project Info: http://www.jfree.org/jfreechart/index.html
8  *
9  * This library is free software; you can redistribute it and/or modify it
10  * under the terms of the GNU Lesser General Public License as published by
11  * the Free Software Foundation; either version 2.1 of the License, or
12  * (at your option) any later version.
13  *
14  * This library is distributed in the hope that it will be useful, but
15  * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
16  * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
17  * License for more details.
18  *
19  * You should have received a copy of the GNU Lesser General Public License
20  * along with this library; if not, write to the Free Software Foundation,
21  * Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
22  *
23  * [Java is a trademark or registered trademark of Sun Microsystems, Inc.
24  * in the United States and other countries.]
25  *
26  * -----------------------
27  * XYToolTipGenerator.java
28  * -----------------------
29  * (C) Copyright 2001-2004, by Object Refinery Limited.
30  *
31  * Original Author: David Gilbert (for Object Refinery Limited);
32  * Contributor(s): -;
33  *
34  * $Id: XYToolTipGenerator.java,v 1.2 2005/03/29 12:54:54 mungady Exp $
35  *
36  * Changes
37  * -------
38  * 15-Apr-2004 : Extracted the generateToolTip() method from the
39  * XYItemLabelGenerator interface and put it into this new
40  * interface (DG);
41  *
42  */
43
44 package org.jfree.chart.labels;
45
46 import org.jfree.data.xy.XYDataset;
47
48 /**
49  * Interface for a tooltip generator for plots that use data from an
50  * {@link XYDataset}.
51  */
52 public interface XYToolTipGenerator {
53
54     /**
55      * Generates the tooltip text for the specified item.
56      *
57      * @param dataset the dataset (<code>null</code> not permitted).
58      * @param series the series index (zero-based).
59      * @param item the item index (zero-based).
60      *
61      * @return The tooltip text (possibly <code>null</code>).
62      */
63     public String JavaDoc generateToolTip(XYDataset dataset, int series, int item);
64
65 }
66
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