001    /*
002     * $Id: ListRolloverProducer.java 3296 2009-03-11 12:06:01Z kleopatra $
003     *
004     * Copyright 2007 Sun Microsystems, Inc., 4150 Network Circle,
005     * Santa Clara, California 95054, U.S.A. All rights reserved.
006     *
007     * This library is free software; you can redistribute it and/or
008     * modify it under the terms of the GNU Lesser General Public
009     * License as published by the Free Software Foundation; either
010     * version 2.1 of the License, or (at your option) any later version.
011     * 
012     * This library is distributed in the hope that it will be useful,
013     * but WITHOUT ANY WARRANTY; without even the implied warranty of
014     * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
015     * Lesser General Public License for more details.
016     * 
017     * You should have received a copy of the GNU Lesser General Public
018     * License along with this library; if not, write to the Free Software
019     * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
020     *
021     */
022    package org.jdesktop.swingx.rollover;
023    
024    import java.awt.Point;
025    import java.awt.Rectangle;
026    
027    import javax.swing.JComponent;
028    import javax.swing.JList;
029    
030    /**
031     * List-specific implementation of RolloverProducer.
032     * 
033     * @author Jeanette Winzenburg
034     */
035    public class ListRolloverProducer extends RolloverProducer {
036    
037        @Override
038        protected void updateRolloverPoint(JComponent component, Point mousePoint) {
039            JList list = (JList) component;
040            int row = list.locationToIndex(mousePoint);
041            if (row >= 0) {
042                Rectangle cellBounds = list.getCellBounds(row, row);
043                if (!cellBounds.contains(mousePoint)) {
044                    row = -1;
045                }
046            }
047            int col = row < 0 ? -1 : 0;
048            rollover.x = col;
049            rollover.y = row;
050        }
051    
052    }