libjava/javax/swing/table/DefaultTableCellRenderer.java

   1 /* DefaultTableCellRenderer.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., 59 Temple Place, Suite 330, Boston, MA
  19 02111-1307 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 package javax.swing.table;
  39
  40 import java.awt.Color;
  41 import java.awt.Component;
  42 import java.awt.Rectangle;
  43 import java.io.Serializable;
  44 import javax.swing.JLabel;
  45 import javax.swing.JTable;
  46 import javax.swing.border.Border;
  47 import javax.swing.border.EmptyBorder;
  48
  49 /**
  50  * Class to display every cells.
  51  */
  52 public class DefaultTableCellRenderer extends JLabel
  53   implements TableCellRenderer, Serializable
  54 {
  55   static final long serialVersionUID = 7878911414715528324L;
  56
  57   protected static Border noFocusBorder;
  58
  59   public static class UIResource extends DefaultTableCellRenderer
  60     implements javax.swing.plaf.UIResource
  61   {
  62     public UIResource()
  63     {
  64     }
  65   }
  66
  67   /**
  68    * Creates a default table cell renderer with an empty border.
  69    */
  70   public DefaultTableCellRenderer()
  71   {
  72     super();
  73     this.noFocusBorder = new EmptyBorder(0, 0, 0, 0);
  74   }
  75
  76   /**
  77    * Assign the unselected-foreground.
  78    *
  79    * @param c the color to assign
  80    */
  81   public void setForeground(Color c)
  82   {
  83     super.setForeground(c);
  84   }
  85
  86   /**
  87    * Assign the unselected-background.
  88    *
  89    * @param c the color to assign
  90    */
  91   public void setBackground(Color c)
  92   {
  93     super.setBackground(c);
  94   }
  95
  96   /**
  97    * Look and feel has changed.
  98    *
  99    * <p>Replaces the current UI object with the  latest version from
 100    * the UIManager.</p>
 101    */
 102   public void updateUI()
 103   {
 104     super.updateUI();
 105   }
 106
 107   /**
 108    * Get the string value of the object and pass it to setText().
 109    *
 110    * @param table the JTable
 111    * @param value the value of the object
 112    * @param isSelected is the cell selected?
 113    * @param hasFocus has the cell the focus?
 114    * @param row the row to render
 115    * @param column the cell to render
 116    *
 117    * @return this component (the default table cell renderer)
 118    */
 119   public Component getTableCellRendererComponent(JTable table, Object value,
 120                                                  boolean isSelected,
 121                                                  boolean hasFocus,
 122                                                  int row, int column)
 123   {
 124     if (value!=null)
 125       super.setText(value.toString());
 126
 127     return this;
 128   }
 129
 130   /**
 131    * Overriden for performance.
 132    *
 133    * <p>This method needs to be overridden in a subclass to actually
 134    * do something.</p>
 135    *
 136    * @return always true
 137    */
 138   public boolean isOpaque()
 139   {
 140     return true;
 141   }
 142
 143   /**
 144    * Overriden for performance.
 145    *
 146    * <p>This method needs to be overridden in a subclass to actually
 147    * do something.</p>
 148    */
 149   public void validate()
 150   {
 151     // Does nothing.
 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   public void repaint(long tm, int x, int y, int width, int height)
 161   {
 162     // Does nothing.
 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   public void repaint(Rectangle r)
 172   {
 173     // Does nothing.
 174   }
 175
 176   /**
 177    * Overriden for performance.
 178    *
 179    * <p>This method needs to be overridden in a subclass to actually
 180    * do something.</p>
 181    */
 182   public void firePropertyChange(String propertyName, Object oldValue,
 183                                  Object newValue)
 184   {
 185     // Does nothing.
 186   }
 187
 188   /**
 189    * Overriden for performance.
 190    *
 191    * <p>This method needs to be overridden in a subclass to actually
 192    * do something.</p>
 193    */
 194   public void firePropertyChange(String propertyName, boolean oldValue,
 195                                  boolean newValue)
 196   {
 197     // Does nothing.
 198   }
 199
 200   /**
 201    * Sets the String for this cell.
 202    *
 203    * @param value the string value for this cell; if value is null it
 204    * sets the text value to an empty string
 205    */
 206   protected void setValue(Object value)
 207   {
 208     super.setText((value!=null) ? value.toString() : "");
 209   }
 210 }