libjava/javax/swing/plaf/basic/BasicComboBoxRenderer.java

   1 /* BasicComboBoxRenderer.java --
   2    Copyright (C) 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
  39 package javax.swing.plaf.basic;
  40
  41 import java.awt.Component;
  42 import java.awt.Dimension;
  43 import java.io.Serializable;
  44
  45 import javax.swing.JLabel;
  46 import javax.swing.JList;
  47 import javax.swing.ListCellRenderer;
  48 import javax.swing.SwingConstants;
  49 import javax.swing.UIDefaults;
  50 import javax.swing.UIManager;
  51 import javax.swing.border.Border;
  52 import javax.swing.border.EmptyBorder;
  53
  54 /**
  55  * This class is renderer for the combo box.
  56  *
  57  * @author Olga Rodimina
  58  */
  59 public class BasicComboBoxRenderer extends JLabel implements ListCellRenderer,
  60                                                              Serializable
  61 {
  62   /**
  63    * This border is used whenever renderer doesn't have a focus.
  64    */
  65   protected static Border noFocusBorder = new EmptyBorder(0, 0, 0, 0);
  66
  67   /**
  68    * Creates a new BasicComboBoxRenderer object.
  69    */
  70   public BasicComboBoxRenderer()
  71   {
  72     setHorizontalAlignment(SwingConstants.LEFT);
  73   }
  74
  75   /**
  76    * Returns preferredSize of the renderer
  77    *
  78    * @return preferredSize of the renderer
  79    */
  80   public Dimension getPreferredSize()
  81   {
  82     return super.getPreferredSize();
  83   }
  84
  85   /**
  86    * getListCellRendererComponent
  87    *
  88    * @param list List of items for which to the background and foreground
  89    *        colors
  90    * @param value object that should be rendered in the cell
  91    * @param index index of the cell in the list of items.
  92    * @param isSelected draw cell highlighted if isSelected is true
  93    * @param cellHasFocus draw focus rectangle around cell if the cell has
  94    *        focus
  95    *
  96    * @return Component that will be used to draw the desired cell.
  97    */
  98   public Component getListCellRendererComponent(JList list, Object value,
  99                                                 int index, boolean isSelected,
 100                                                 boolean cellHasFocus)
 101   {
 102     String s = value.toString();
 103     setText(s);
 104     setOpaque(true);
 105
 106     UIDefaults defaults = UIManager.getLookAndFeelDefaults();
 107
 108     if (isSelected)
 109       {
 110         setBackground(list.getSelectionBackground());
 111         setForeground(list.getSelectionForeground());
 112       }
 113     else
 114       {
 115         setBackground(list.getBackground());
 116         setForeground(list.getForeground());
 117       }
 118
 119     setEnabled(list.isEnabled());
 120     setFont(list.getFont());
 121
 122     // Use focusCellHighlightBorder when renderer has focus and
 123     // noFocusBorder otherwise
 124     if (cellHasFocus)
 125       setBorder(UIManager.getBorder("List.focusCellHighlightBorder"));
 126     else
 127       setBorder(noFocusBorder);
 128
 129     return this;
 130   }
 131
 132   public static class UIResource extends BasicComboBoxRenderer
 133     implements javax.swing.plaf.UIResource
 134   {
 135     /**
 136      * Creates a new UIResource object.
 137      */
 138     public UIResource()
 139     {
 140     }
 141   }
 142 }