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}