org.jdesktop.swingx.rollover.ListRolloverProducer Maven / Gradle / Ivy

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There is a newer version: 1.6.8

/*
 * $Id$
 *
 * Copyright 2007 Sun Microsystems, Inc., 4150 Network Circle,
 * Santa Clara, California 95054, U.S.A. All rights reserved.
 *
 * 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 St, Fifth Floor, Boston, MA  02110-1301  USA
 *
 */
package org.jdesktop.swingx.rollover;

import java.awt.Point;
import java.awt.Rectangle;

import javax.swing.JComponent;
import javax.swing.JList;

/**
 * List-specific implementation of RolloverProducer.
 * 
 * @author Jeanette Winzenburg
 */
public class ListRolloverProducer extends RolloverProducer {

    @Override
    protected void updateRolloverPoint(JComponent component, Point mousePoint) {
        JList list = (JList) component;
        int row = list.locationToIndex(mousePoint);
        if (row >= 0) {
            Rectangle cellBounds = list.getCellBounds(row, row);
            if (!cellBounds.contains(mousePoint)) {
                row = -1;
            }
        }
        int col = row < 0 ? -1 : 0;
        rollover.x = col;
        rollover.y = row;
    }

}