Source for javax.swing.table.DefaultTableCellRenderer

   1: /* DefaultTableCellRenderer.java --
   2:    Copyright (C) 2002, 2004, 2005  Free Software Foundation, Inc.
   3: 
   4: This file is part of GNU Classpath.
   5: 
   6: GNU Classpath is free software; you can redistribute it and/or modify
   7: it under the terms of the GNU General Public License as published by
   8: the Free Software Foundation; either version 2, or (at your option)
   9: any later version.
  10: 
  11: GNU Classpath is distributed in the hope that it will be useful, but
  12: WITHOUT ANY WARRANTY; without even the implied warranty of
  13: MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14: General Public License for more details.
  15: 
  16: You should have received a copy of the GNU General Public License
  17: along with GNU Classpath; see the file COPYING.  If not, write to the
  18: Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  19: 02110-1301 USA.
  20: 
  21: Linking this library statically or dynamically with other modules is
  22: making a combined work based on this library.  Thus, the terms and
  23: conditions of the GNU General Public License cover the whole
  24: combination.
  25: 
  26: As a special exception, the copyright holders of this library give you
  27: permission to link this library with independent modules to produce an
  28: executable, regardless of the license terms of these independent
  29: modules, and to copy and distribute the resulting executable under
  30: terms of your choice, provided that you also meet, for each linked
  31: independent module, the terms and conditions of the license of that
  32: module.  An independent module is a module which is not derived from
  33: or based on this library.  If you modify this library, you may extend
  34: this exception to your version of the library, but you are not
  35: obligated to do so.  If you do not wish to do so, delete this
  36: exception statement from your version. */
  37: 
  38: 
  39: package javax.swing.table;
  40: 
  41: import java.awt.Color;
  42: import java.awt.Component;
  43: import java.awt.Rectangle;
  44: import java.io.Serializable;
  45: 
  46: import javax.swing.JLabel;
  47: import javax.swing.JTable;
  48: import javax.swing.border.Border;
  49: import javax.swing.border.EmptyBorder;
  50: 
  51: /**
  52:  * Class to display every cells.
  53:  */
  54: public class DefaultTableCellRenderer extends JLabel
  55:   implements TableCellRenderer, Serializable
  56: {
  57:   static final long serialVersionUID = 7878911414715528324L;
  58: 
  59:   protected static Border noFocusBorder = new EmptyBorder(0, 0, 0, 0);
  60: 
  61:   public static class UIResource extends DefaultTableCellRenderer
  62:     implements javax.swing.plaf.UIResource
  63:   {
  64:     public UIResource()
  65:     {
  66:     }
  67:   }
  68: 
  69:   /**
  70:    * Creates a default table cell renderer with an empty border.
  71:    */
  72:   public DefaultTableCellRenderer()
  73:   {
  74:     super();
  75:   }
  76: 
  77:   /**
  78:    * Assign the unselected-foreground.
  79:    *
  80:    * @param c the color to assign
  81:    */
  82:   public void setForeground(Color c)
  83:   {
  84:     super.setForeground(c);
  85:   }
  86: 
  87:   /**
  88:    * Assign the unselected-background.
  89:    *
  90:    * @param c the color to assign
  91:    */
  92:   public void setBackground(Color c)
  93:   {
  94:     super.setBackground(c);
  95:   }
  96: 
  97:   /**
  98:    * Look and feel has changed.
  99:    *
 100:    * <p>Replaces the current UI object with the  latest version from
 101:    * the UIManager.</p>
 102:    */
 103:   public void updateUI()
 104:   {
 105:     super.updateUI();
 106:   }
 107: 
 108:   /**
 109:    * Get the string value of the object and pass it to setText().
 110:    *
 111:    * @param table the JTable
 112:    * @param value the value of the object
 113:    * @param isSelected is the cell selected?
 114:    * @param hasFocus has the cell the focus?
 115:    * @param row the row to render
 116:    * @param column the cell to render
 117:    * 
 118:    * @return this component (the default table cell renderer)
 119:    */
 120:   public Component getTableCellRendererComponent(JTable table, Object value,
 121:                                                  boolean isSelected,
 122:                                                  boolean hasFocus,
 123:                                                  int row, int column)
 124:   {
 125:     if (value != null)
 126:       super.setText(value.toString());
 127: 
 128:     setOpaque(true);
 129: 
 130:     if (table == null)
 131:       return this;
 132: 
 133:     if (isSelected)
 134:       {
 135:         setBackground(table.getSelectionBackground());
 136:         setForeground(table.getSelectionForeground());
 137:       }
 138:     else
 139:       {
 140:         setBackground(table.getBackground());
 141:         setForeground(table.getForeground());
 142:       }
 143: 
 144:     setEnabled(table.isEnabled());
 145:     setFont(table.getFont());
 146:     return this;    
 147:   }
 148: 
 149:   /**
 150:    * Overriden for performance.
 151:    *
 152:    * <p>This method needs to be overridden in a subclass to actually
 153:    * do something.</p>
 154:    *
 155:    * @return always true
 156:    */
 157:   public boolean isOpaque()
 158:   {
 159:     return true;
 160:   }
 161: 
 162:   /**
 163:    * Overriden for performance.
 164:    *
 165:    * <p>This method needs to be overridden in a subclass to actually
 166:    * do something.</p>
 167:    */
 168:   public void validate()
 169:   {
 170:     // Does nothing.
 171:   }
 172: 
 173:   public void revalidate()
 174:   {
 175:     // Does nothing.
 176:   }
 177: 
 178:   /**
 179:    * Overriden for performance.
 180:    *
 181:    * <p>This method needs to be overridden in a subclass to actually
 182:    * do something.</p>
 183:    */
 184:   public void repaint(long tm, int x, int y, int width, int height)
 185:   {
 186:     // Does nothing.
 187:   }
 188: 
 189:   /**
 190:    * Overriden for performance.
 191:    *
 192:    * <p>This method needs to be overridden in a subclass to actually
 193:    * do something.</p>
 194:    */
 195:   public void repaint(Rectangle r)
 196:   {
 197:     // Does nothing.
 198:   }
 199: 
 200:   /**
 201:    * Overriden for performance.
 202:    *
 203:    * <p>This method needs to be overridden in a subclass to actually
 204:    * do something.</p>
 205:    */
 206:   protected void firePropertyChange(String propertyName, Object oldValue,
 207:                                     Object newValue)
 208:   {
 209:     // Does nothing.
 210:   }
 211: 
 212:   /**
 213:    * Overriden for performance.
 214:    *
 215:    * <p>This method needs to be overridden in a subclass to actually
 216:    * do something.</p>
 217:    */
 218:   public void firePropertyChange(String propertyName, boolean oldValue,
 219:                          boolean newValue)
 220:   {
 221:     // Does nothing.
 222:   }
 223: 
 224:   /**
 225:    * Sets the String for this cell.
 226:    * 
 227:    * @param value the string value for this cell; if value is null it
 228:    * sets the text value to an empty string
 229:    */
 230:   protected void setValue(Object value)
 231:   {
 232:     super.setText((value!=null) ? value.toString() : "");
 233:   }
 234: }