001/* ===========================================================
002 * JFreeChart : a free chart library for the Java(tm) platform
003 * ===========================================================
004 *
005 * (C) Copyright 2000-present, by David Gilbert and Contributors.
006 *
007 * Project Info:  http://www.jfree.org/jfreechart/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 * [Oracle and Java are registered trademarks of Oracle and/or its affiliates. 
025 * Other names may be trademarks of their respective owners.]
026 *
027 */
028
029package org.jfree.chart.ui;
030
031import java.awt.Component;
032import java.text.NumberFormat;
033import javax.swing.JTable;
034import javax.swing.SwingConstants;
035import javax.swing.table.DefaultTableCellRenderer;
036
037/**
038 * A table cell renderer that formats numbers with right alignment in each cell.
039 */
040public class NumberCellRenderer extends DefaultTableCellRenderer {
041
042    /**
043     * Default constructor - builds a renderer that right justifies the 
044     * contents of a table cell.
045     */
046    public NumberCellRenderer() {
047        super();
048        setHorizontalAlignment(SwingConstants.RIGHT);
049    }
050
051    /**
052     * Returns itself as the renderer. Supports the TableCellRenderer interface.
053     *
054     * @param table  the table.
055     * @param value  the data to be rendered.
056     * @param isSelected  a boolean that indicates whether or not the cell is 
057     *                    selected.
058     * @param hasFocus  a boolean that indicates whether or not the cell has 
059     *                  the focus.
060     * @param row  the (zero-based) row index.
061     * @param column  the (zero-based) column index.
062     *
063     * @return the component that can render the contents of the cell.
064     */
065    @Override
066    public Component getTableCellRendererComponent(JTable table, 
067            Object value, boolean isSelected, 
068            boolean hasFocus, int row, int column) {
069
070        setFont(null);
071        NumberFormat nf = NumberFormat.getNumberInstance();
072        if (value != null) {
073          setText(nf.format(value));
074        } else {
075          setText("");
076        }
077        if (isSelected) {
078            setBackground(table.getSelectionBackground());
079        } else {
080            setBackground(null);
081        }
082        return this;
083    }
084
085}
086