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
044 package org.jfree.ui;
045
046 import java.awt.Component;
047 import java.text.NumberFormat;
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 numbers with right alignment in each cell.
054 *
055 * @author David Gilbert
056 */
057 public 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 }