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 */
022package org.jdesktop.swingx.rollover;
023
024import java.awt.Point;
025import java.awt.Rectangle;
026
027import javax.swing.JComponent;
028import javax.swing.JList;
029
030/**
031 * List-specific implementation of RolloverProducer.
032 * 
033 * @author Jeanette Winzenburg
034 */
035public 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}