    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 * NumberCellRenderer.java
    029 * -----------------------
    030 * (C) Copyright 2000-2004, by Object Refinery Limited.
    031 *
    032 * Original Author:  David Gilbert (for Object Refinery Limited);
    033 * Contributor(s):   -;
    034 *
    035 * $Id: NumberCellRenderer.java,v 1.7 2007/11/02 17:50:36 taqua Exp $
    036 *
    037 * Changes (from 26-Oct-2001)
    038 * --------------------------
    039 * 26-Oct-2001 : Changed package to com.jrefinery.ui.*;
    040 * 11-Mar-2002 : Updated import statements (DG);
    041 *
    042 */
    043
    044package org.jfree.ui;
    045
    046import java.awt.Component;
    047import java.text.NumberFormat;
    048import javax.swing.JTable;
    049import javax.swing.SwingConstants;
    050import javax.swing.table.DefaultTableCellRenderer;
    051
    052/**
    053 * A table cell renderer that formats numbers with right alignment in each cell.
    054 *
    055 * @author David Gilbert
    056 */
    057public class NumberCellRenderer extends DefaultTableCellRenderer {
    058
    059    /**
    060     * Default constructor - builds a renderer that right justifies the
    061     * contents of a table cell.
    062     */
    063    public NumberCellRenderer() {
    064        super();
    065        setHorizontalAlignment(SwingConstants.RIGHT);
    066    }
    067
    068    /**
    069     * Returns itself as the renderer. Supports the TableCellRenderer interface.
    070     *
    071     * @param table  the table.
    072     * @param value  the data to be rendered.
    073     * @param isSelected  a boolean that indicates whether or not the cell is
    074     *                    selected.
    075     * @param hasFocus  a boolean that indicates whether or not the cell has
    076     *                  the focus.
    077     * @param row  the (zero-based) row index.
    078     * @param column  the (zero-based) column index.
    079     *
    080     * @return the component that can render the contents of the cell.
    081     */
    082    public Component getTableCellRendererComponent(final JTable table,
    083            final Object value, final boolean isSelected,
    084            final boolean hasFocus, final int row, final int column) {
    085
    086        setFont(null);
    087        final NumberFormat nf = NumberFormat.getNumberInstance();
    088        if (value != null) {
    089          setText(nf.format(value));
    090        }
    091        else {
    092          setText("");
    093        }
    094        if (isSelected) {
    095            setBackground(table.getSelectionBackground());
    096        }
    097        else {
    098            setBackground(null);
    099        }
    100        return this;
    101    }
    102
    103}