Source for javax.swing.DefaultListCellRenderer

   1: /* DefaultListCellRenderer.java --
   2:    Copyright (C) 2002, 2004 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;
  40: 
  41: import java.awt.Component;
  42: import java.awt.Rectangle;
  43: import java.io.Serializable;
  44: 
  45: import javax.swing.border.Border;
  46: import javax.swing.border.EmptyBorder;
  47: 
  48: /**
  49:  * The default implementation {@link ListCellRenderer}. It provides a standard
  50:  * renderer for data objects of all types via {@link Object#toString()}.
  51:  *
  52:  * @author Andrew Selkirk
  53:  */
  54: public class DefaultListCellRenderer extends JLabel
  55:   implements ListCellRenderer, Serializable
  56: {
  57:   private static final long serialVersionUID = 7708947179685189462L;
  58: 
  59:   /**
  60:    * Subclasses <code>DefaultListCellRenderers</code> and implements
  61:    * {@link javax.swing.plaf.UIResource}. This is used by
  62:    * {@link javax.swing.plaf.ListUI} subclasses to provide a default for
  63:    * the <code>List.cellRenderer</code> property. If you want to override
  64:    * this property, use <code>DefaultListCellRenderer</code> or a subclass.
  65:    */
  66:   public static class UIResource extends DefaultListCellRenderer
  67:     implements javax.swing.plaf.UIResource
  68:   {
  69:     public UIResource()
  70:     {
  71:     }
  72:   }
  73: 
  74:   /**
  75:    * This border is used whenever renderer doesn't have a focus.
  76:    */
  77:   protected static Border noFocusBorder = new EmptyBorder(1, 1, 1, 1);
  78: 
  79:   /**
  80:    * getListCellRendererComponent
  81:    *
  82:    * @param list JList list for the 'value'
  83:    * @param value object that should be rendered in the cell
  84:    * @param index index of the cell
  85:    * @param isSelected draw cell highlighted if isSelected is true
  86:    * @param cellHasFocus draw focus rectangle around cell if the cell has
  87:    *        focus
  88:    *
  89:    * @return Component that will be painted to the desired cell.
  90:    */
  91:   public Component getListCellRendererComponent(JList list, Object value,
  92:                                                 int index, boolean isSelected,
  93:                                                 boolean cellHasFocus)
  94:   {
  95:     String s = value.toString();
  96:     setText(s);
  97:     setOpaque(true);
  98:     setHorizontalAlignment(LEFT);
  99: 
 100:     if (isSelected)
 101:       {
 102:         setBackground(list.getSelectionBackground());
 103:         setForeground(list.getSelectionForeground());
 104:       }
 105:     else
 106:       {
 107:         setBackground(list.getBackground());
 108:         setForeground(list.getForeground());
 109:       }
 110: 
 111:     setEnabled(list.isEnabled());
 112:     setFont(list.getFont());
 113: 
 114:     // Use focusCellHighlightBorder when renderer has focus and
 115:     // noFocusBorder otherwise
 116: 
 117:     if (cellHasFocus)
 118:       setBorder(UIManager.getBorder("List.focusCellHighlightBorder"));
 119:     else
 120:       setBorder(noFocusBorder);
 121: 
 122:     return this;
 123:   }
 124: 
 125:   public void validate()
 126:   {
 127:   }
 128: 
 129:   public void revalidate()
 130:   {
 131:   }
 132: 
 133:   public void repaint(long tm, int x, int y, int w, int h)
 134:   {
 135:   }
 136: 
 137:   public void repaint(Rectangle rect)
 138:   {
 139:   }
 140: 
 141:   protected void firePropertyChange(String propertyName, Object oldValue,
 142:                                     Object newValue)
 143:   {
 144:   }
 145: 
 146:   public void firePropertyChange(String propertyName, byte oldValue,
 147:                                  byte newValue)
 148:   {
 149:   }
 150: 
 151:   public void firePropertyChange(String propertyName, char oldValue,
 152:                                  char newValue)
 153:   {
 154:   }
 155: 
 156:   public void firePropertyChange(String propertyName, short oldValue,
 157:                                  short newValue)
 158:   {
 159:   }
 160: 
 161:   public void firePropertyChange(String propertyName, int oldValue,
 162:                                  int newValue)
 163:   {
 164:   }
 165: 
 166:   public void firePropertyChange(String propertyName, long oldValue,
 167:                                  long newValue)
 168:   {
 169:   }
 170: 
 171:   public void firePropertyChange(String propertyName, float oldValue,
 172:                                  float newValue)
 173:   {
 174:   }
 175: 
 176:   public void firePropertyChange(String propertyName, double oldValue,
 177:                                  double newValue)
 178:   {
 179:   }
 180: 
 181:   public void firePropertyChange(String propertyName, boolean oldValue,
 182:                                  boolean newValue)
 183:   {
 184:   }
 185: }