/* ===========================================================
* JFreeChart : a free chart library for the Java(tm) platform
* ===========================================================
*
* (C) Copyright 2000-2007, 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.
*
* [Java is a trademark or registered trademark of Sun Microsystems, Inc.
* in the United States and other countries.]
*
* -----------------------------
* CategoryToolTipGenerator.java
* -----------------------------
* (C) Copyright 2001-2007, by Object Refinery Limited.
*
* Original Author: David Gilbert (for Object Refinery Limited);
* Contributor(s): -;
*
* Changes
* -------
* 15-Apr-2004 : Separated tool tip method from CategoryItemLabelGenerator
* interface (DG);
*
*/
package org.jfree.chart.labels;
import org.jfree.data.category.CategoryDataset;
/**
* A <i>category tool tip generator</i> is an object that can be assigned to a
* {@link org.jfree.chart.renderer.category.CategoryItemRenderer} and that
* assumes responsibility for creating text items to be used as tooltips for the
* items in a {@link org.jfree.chart.plot.CategoryPlot}.
* <p>
* To assist with cloning charts, classes that implement this interface should
* also implement the <code>org.jfree.util.PublicCloneable</code> interface (in
* JCommon).
*/
public interface CategoryToolTipGenerator {
/**
* Generates the tool tip text for an item in a dataset. Note: in the
* current dataset implementation, each row is a series, and each column
* contains values for a particular category.
*
* @param dataset the dataset (<code>null</code> not permitted).
* @param row the row index (zero-based).
* @param column the column index (zero-based).
*
* @return The tooltip text (possibly <code>null</code>).
*/
public String generateToolTip(CategoryDataset dataset, int row, int column);
}
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