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.BorderFactory;
  47: import javax.swing.JLabel;
  48: import javax.swing.JTable;
  49: import javax.swing.UIManager;
  50: import javax.swing.border.Border;
  51: import javax.swing.border.EmptyBorder;
  52: import javax.swing.JTextField;
  53: 
  54: /**
  55:  * Class to display every cells.
  56:  */
  57: public class DefaultTableCellRenderer extends JLabel
  58:   implements TableCellRenderer, Serializable
  59: {
  60:   static final long serialVersionUID = 7878911414715528324L;
  61: 
  62:   protected static Border noFocusBorder = new EmptyBorder(0, 0, 0, 0);
  63: 
  64:   public static class UIResource extends DefaultTableCellRenderer
  65:     implements javax.swing.plaf.UIResource
  66:   {
  67:     public UIResource()
  68:     {
  69:       super();
  70:     }
  71:   }
  72: 
  73:   /**
  74:    * Creates a default table cell renderer with an empty border.
  75:    */
  76:   public DefaultTableCellRenderer()
  77:   {
  78:     super();
  79:   }
  80: 
  81:   /**
  82:    * Assign the unselected-foreground.
  83:    *
  84:    * @param c the color to assign
  85:    */
  86:   public void setForeground(Color c)
  87:   {
  88:     super.setForeground(c);
  89:   }
  90: 
  91:   /**
  92:    * Assign the unselected-background.
  93:    *
  94:    * @param c the color to assign
  95:    */
  96:   public void setBackground(Color c)
  97:   {
  98:     super.setBackground(c);
  99:   }
 100: 
 101:   /**
 102:    * Look and feel has changed.
 103:    *
 104:    * <p>Replaces the current UI object with the  latest version from
 105:    * the UIManager.</p>
 106:    */
 107:   public void updateUI()
 108:   {
 109:     super.updateUI();
 110:   }
 111: 
 112:   /**
 113:    * Get the string value of the object and pass it to setText().
 114:    *
 115:    * @param table the JTable
 116:    * @param value the value of the object
 117:    * @param isSelected is the cell selected?
 118:    * @param hasFocus has the cell the focus?
 119:    * @param row the row to render
 120:    * @param column the cell to render
 121:    * 
 122:    * @return this component (the default table cell renderer)
 123:    */
 124:   public Component getTableCellRendererComponent(JTable table, Object value,
 125:                                                  boolean isSelected,
 126:                                                  boolean hasFocus,
 127:                                                  int row, int column)
 128:   {
 129:     if (value != null)
 130:       {
 131:         if (value instanceof JTextField)
 132:           return new JTextField(((JTextField)value).getText());
 133:         super.setText(value.toString());
 134:       }
 135: 
 136:     setOpaque(true);
 137: 
 138:     if (table == null)
 139:       return this;
 140: 
 141:     if (isSelected)
 142:       {
 143:         setBackground(table.getSelectionBackground());
 144:         setForeground(table.getSelectionForeground());
 145:       }
 146:     else
 147:       {
 148:         setBackground(table.getBackground());
 149:         setForeground(table.getForeground());
 150:       }
 151:     if (hasFocus)
 152:       {
 153:         setBackground(table.getBackground());
 154:         setBorder(UIManager.getBorder("Table.focusCellHighlightBorder"));
 155:       }
 156:     else
 157:       setBorder(BorderFactory.createEmptyBorder(1, 1, 1, 1));
 158: 
 159:     setEnabled(table.isEnabled());
 160:     setFont(table.getFont());
 161: 
 162:     return this;    
 163:   }
 164: 
 165:   /**
 166:    * Overriden for performance.
 167:    *
 168:    * <p>This method needs to be overridden in a subclass to actually
 169:    * do something.</p>
 170:    *
 171:    * @return always true
 172:    */
 173:   public boolean isOpaque()
 174:   {
 175:     return true;
 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 validate()
 185:   {
 186:     // Does nothing.
 187:   }
 188: 
 189:   public void revalidate()
 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(long tm, int x, int y, int width, int height)
 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:   public void repaint(Rectangle r)
 212:   {
 213:     // Does nothing.
 214:   }
 215: 
 216:   /**
 217:    * Overriden for performance.
 218:    *
 219:    * <p>This method needs to be overridden in a subclass to actually
 220:    * do something.</p>
 221:    */
 222:   protected void firePropertyChange(String propertyName, Object oldValue,
 223:                                     Object newValue)
 224:   {
 225:     // Does nothing.
 226:   }
 227: 
 228:   /**
 229:    * Overriden for performance.
 230:    *
 231:    * <p>This method needs to be overridden in a subclass to actually
 232:    * do something.</p>
 233:    */
 234:   public void firePropertyChange(String propertyName, boolean oldValue,
 235:                          boolean newValue)
 236:   {
 237:     // Does nothing.
 238:   }
 239: 
 240:   /**
 241:    * Sets the String for this cell.
 242:    * 
 243:    * @param value the string value for this cell; if value is null it
 244:    * sets the text value to an empty string
 245:    */
 246:   protected void setValue(Object value)
 247:   {
 248:     super.setText((value!=null) ? value.toString() : "");
 249:   }
 250: }