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: import javax.swing.JTextField;
  51: 
  52: /**
  53:  * Class to display every cells.
  54:  */
  55: public class DefaultTableCellRenderer extends JLabel
  56:   implements TableCellRenderer, Serializable
  57: {
  58:   static final long serialVersionUID = 7878911414715528324L;
  59: 
  60:   protected static Border noFocusBorder = new EmptyBorder(0, 0, 0, 0);
  61: 
  62:   public static class UIResource extends DefaultTableCellRenderer
  63:     implements javax.swing.plaf.UIResource
  64:   {
  65:     public UIResource()
  66:     {
  67:     }
  68:   }
  69: 
  70:   /**
  71:    * Creates a default table cell renderer with an empty border.
  72:    */
  73:   public DefaultTableCellRenderer()
  74:   {
  75:     super();
  76:   }
  77: 
  78:   /**
  79:    * Assign the unselected-foreground.
  80:    *
  81:    * @param c the color to assign
  82:    */
  83:   public void setForeground(Color c)
  84:   {
  85:     super.setForeground(c);
  86:   }
  87: 
  88:   /**
  89:    * Assign the unselected-background.
  90:    *
  91:    * @param c the color to assign
  92:    */
  93:   public void setBackground(Color c)
  94:   {
  95:     super.setBackground(c);
  96:   }
  97: 
  98:   /**
  99:    * Look and feel has changed.
 100:    *
 101:    * <p>Replaces the current UI object with the  latest version from
 102:    * the UIManager.</p>
 103:    */
 104:   public void updateUI()
 105:   {
 106:     super.updateUI();
 107:   }
 108: 
 109:   /**
 110:    * Get the string value of the object and pass it to setText().
 111:    *
 112:    * @param table the JTable
 113:    * @param value the value of the object
 114:    * @param isSelected is the cell selected?
 115:    * @param hasFocus has the cell the focus?
 116:    * @param row the row to render
 117:    * @param column the cell to render
 118:    * 
 119:    * @return this component (the default table cell renderer)
 120:    */
 121:   public Component getTableCellRendererComponent(JTable table, Object value,
 122:                                                  boolean isSelected,
 123:                                                  boolean hasFocus,
 124:                                                  int row, int column)
 125:   {
 126:     if (value != null)
 127:       {
 128:         if (value instanceof JTextField)
 129:           return new JTextField(((JTextField)value).getText());
 130:         super.setText(value.toString());
 131:       }
 132: 
 133:     setOpaque(true);
 134: 
 135:     if (table == null)
 136:       return this;
 137: 
 138:     if (isSelected)
 139:       {
 140:         setBackground(table.getSelectionBackground());
 141:         setForeground(table.getSelectionForeground());
 142:       }
 143:     else
 144:       {
 145:         setBackground(table.getBackground());
 146:         setForeground(table.getForeground());
 147:       }
 148: 
 149:     setEnabled(table.isEnabled());
 150:     setFont(table.getFont());
 151:     return this;    
 152:   }
 153: 
 154:   /**
 155:    * Overriden for performance.
 156:    *
 157:    * <p>This method needs to be overridden in a subclass to actually
 158:    * do something.</p>
 159:    *
 160:    * @return always true
 161:    */
 162:   public boolean isOpaque()
 163:   {
 164:     return true;
 165:   }
 166: 
 167:   /**
 168:    * Overriden for performance.
 169:    *
 170:    * <p>This method needs to be overridden in a subclass to actually
 171:    * do something.</p>
 172:    */
 173:   public void validate()
 174:   {
 175:     // Does nothing.
 176:   }
 177: 
 178:   public void revalidate()
 179:   {
 180:     // Does nothing.
 181:   }
 182: 
 183:   /**
 184:    * Overriden for performance.
 185:    *
 186:    * <p>This method needs to be overridden in a subclass to actually
 187:    * do something.</p>
 188:    */
 189:   public void repaint(long tm, int x, int y, int width, int height)
 190:   {
 191:     // Does nothing.
 192:   }
 193: 
 194:   /**
 195:    * Overriden for performance.
 196:    *
 197:    * <p>This method needs to be overridden in a subclass to actually
 198:    * do something.</p>
 199:    */
 200:   public void repaint(Rectangle r)
 201:   {
 202:     // Does nothing.
 203:   }
 204: 
 205:   /**
 206:    * Overriden for performance.
 207:    *
 208:    * <p>This method needs to be overridden in a subclass to actually
 209:    * do something.</p>
 210:    */
 211:   protected void firePropertyChange(String propertyName, Object oldValue,
 212:                                     Object newValue)
 213:   {
 214:     // Does nothing.
 215:   }
 216: 
 217:   /**
 218:    * Overriden for performance.
 219:    *
 220:    * <p>This method needs to be overridden in a subclass to actually
 221:    * do something.</p>
 222:    */
 223:   public void firePropertyChange(String propertyName, boolean oldValue,
 224:                          boolean newValue)
 225:   {
 226:     // Does nothing.
 227:   }
 228: 
 229:   /**
 230:    * Sets the String for this cell.
 231:    * 
 232:    * @param value the string value for this cell; if value is null it
 233:    * sets the text value to an empty string
 234:    */
 235:   protected void setValue(Object value)
 236:   {
 237:     super.setText((value!=null) ? value.toString() : "");
 238:   }
 239: }