Source for org.jfree.ui.DateCellRenderer

   1: /* ========================================================================
   2:  * JCommon : a free general purpose class library for the Java(tm) platform
   3:  * ========================================================================
   4:  *
   5:  * (C) Copyright 2000-2005, by Object Refinery Limited and Contributors.
   6:  * 
   7:  * Project Info:  http://www.jfree.org/jcommon/index.html
   8:  *
   9:  * This library is free software; you can redistribute it and/or modify it 
  10:  * under the terms of the GNU Lesser General Public License as published by 
  11:  * the Free Software Foundation; either version 2.1 of the License, or 
  12:  * (at your option) any later version.
  13:  *
  14:  * This library is distributed in the hope that it will be useful, but 
  15:  * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY 
  16:  * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public 
  17:  * License for more details.
  18:  *
  19:  * You should have received a copy of the GNU Lesser General Public
  20:  * License along with this library; if not, write to the Free Software
  21:  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, 
  22:  * USA.  
  23:  *
  24:  * [Java is a trademark or registered trademark of Sun Microsystems, Inc. 
  25:  * in the United States and other countries.]
  26:  * 
  27:  * ---------------------
  28:  * DateCellRenderer.java
  29:  * ---------------------
  30:  * (C) Copyright 2003, 2004, by Object Refinery Limited.
  31:  *
  32:  * Original Author:  David Gilbert (for Object Refinery Limited);
  33:  * Contributor(s):   -;
  34:  *
  35:  * $Id: DateCellRenderer.java,v 1.6 2006/04/30 09:07:20 taqua Exp $
  36:  *
  37:  * Changes (from 26-Oct-2001)
  38:  * --------------------------
  39:  * 24-Jul-2003 : Version 1 (DG);
  40:  *
  41:  */
  42: 
  43: package org.jfree.ui;
  44: 
  45: import java.awt.Component;
  46: import java.text.DateFormat;
  47: 
  48: import javax.swing.JTable;
  49: import javax.swing.SwingConstants;
  50: import javax.swing.table.DefaultTableCellRenderer;
  51: 
  52: /**
  53:  * A table cell renderer that formats dates.
  54:  *
  55:  * @author David Gilbert
  56:  */
  57: public class DateCellRenderer extends DefaultTableCellRenderer {
  58: 
  59:     /** The formatter. */
  60:     private DateFormat formatter;
  61:     
  62:     /**
  63:      * Default constructor.
  64:      */
  65:     public DateCellRenderer() {
  66:         this(DateFormat.getDateTimeInstance());
  67:     }
  68:     
  69:     /**
  70:      * Creates a new renderer.
  71:      * 
  72:      * @param formatter  the formatter.
  73:      */
  74:     public DateCellRenderer(final DateFormat formatter) {
  75:         super();
  76:         this.formatter = formatter;
  77:         setHorizontalAlignment(SwingConstants.CENTER);
  78:     }
  79: 
  80:     /**
  81:      * Returns itself as the renderer. Supports the TableCellRenderer interface.
  82:      *
  83:      * @param table  the table.
  84:      * @param value  the data to be rendered.
  85:      * @param isSelected  a boolean that indicates whether or not the cell is 
  86:      *                    selected.
  87:      * @param hasFocus  a boolean that indicates whether or not the cell has 
  88:      *                  the focus.
  89:      * @param row  the (zero-based) row index.
  90:      * @param column  the (zero-based) column index.
  91:      *
  92:      * @return the component that can render the contents of the cell.
  93:      */
  94:     public Component getTableCellRendererComponent(final JTable table, 
  95:             final Object value, final boolean isSelected, 
  96:             final boolean hasFocus, final int row, final int column) {
  97: 
  98:         setFont(null);
  99:         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: }