001    /* ========================================================================
002     * JCommon : a free general purpose class library for the Java(tm) platform
003     * ========================================================================
004     *
005     * (C) Copyright 2000-2005, by Object Refinery Limited and Contributors.
006     * 
007     * Project Info:  http://www.jfree.org/jcommon/index.html
008     *
009     * This library is free software; you can redistribute it and/or modify it 
010     * under the terms of the GNU Lesser General Public License as published by 
011     * the Free Software Foundation; either version 2.1 of the License, or 
012     * (at your option) any later version.
013     *
014     * This library is distributed in the hope that it will be useful, but 
015     * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY 
016     * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public 
017     * License for more details.
018     *
019     * You should have received a copy of the GNU Lesser General Public
020     * License along with this library; if not, write to the Free Software
021     * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, 
022     * USA.  
023     *
024     * [Java is a trademark or registered trademark of Sun Microsystems, Inc. 
025     * in the United States and other countries.]
026     * 
027     * ---------------------
028     * DateCellRenderer.java
029     * ---------------------
030     * (C) Copyright 2003, 2004, by Object Refinery Limited.
031     *
032     * Original Author:  David Gilbert (for Object Refinery Limited);
033     * Contributor(s):   -;
034     *
035     * $Id: DateCellRenderer.java,v 1.6 2006/04/30 09:07:20 taqua Exp $
036     *
037     * Changes (from 26-Oct-2001)
038     * --------------------------
039     * 24-Jul-2003 : Version 1 (DG);
040     *
041     */
042    
043    package org.jfree.ui;
044    
045    import java.awt.Component;
046    import java.text.DateFormat;
047    
048    import javax.swing.JTable;
049    import javax.swing.SwingConstants;
050    import javax.swing.table.DefaultTableCellRenderer;
051    
052    /**
053     * A table cell renderer that formats dates.
054     *
055     * @author David Gilbert
056     */
057    public class DateCellRenderer extends DefaultTableCellRenderer {
058    
059        /** The formatter. */
060        private DateFormat formatter;
061        
062        /**
063         * Default constructor.
064         */
065        public DateCellRenderer() {
066            this(DateFormat.getDateTimeInstance());
067        }
068        
069        /**
070         * Creates a new renderer.
071         * 
072         * @param formatter  the formatter.
073         */
074        public DateCellRenderer(final DateFormat formatter) {
075            super();
076            this.formatter = formatter;
077            setHorizontalAlignment(SwingConstants.CENTER);
078        }
079    
080        /**
081         * Returns itself as the renderer. Supports the TableCellRenderer interface.
082         *
083         * @param table  the table.
084         * @param value  the data to be rendered.
085         * @param isSelected  a boolean that indicates whether or not the cell is 
086         *                    selected.
087         * @param hasFocus  a boolean that indicates whether or not the cell has 
088         *                  the focus.
089         * @param row  the (zero-based) row index.
090         * @param column  the (zero-based) column index.
091         *
092         * @return the component that can render the contents of the cell.
093         */
094        public Component getTableCellRendererComponent(final JTable table, 
095                final Object value, final boolean isSelected, 
096                final boolean hasFocus, final int row, final int column) {
097    
098            setFont(null);
099            if (value != null) {
100              setText(this.formatter.format(value));
101            }
102            else {
103              setText("");
104            }
105            if (isSelected) {
106                setBackground(table.getSelectionBackground());
107            }
108            else {
109                setBackground(null);
110            }
111            return this;
112        }
113    
114    }