Source for javax.swing.plaf.basic.BasicTextFieldUI

   1: /* BasicTextFieldUI.java
   2:    Copyright (C) 2004, 2006,  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.plaf.basic;
  40: 
  41: import java.awt.Color;
  42: import java.beans.PropertyChangeEvent;
  43: 
  44: import javax.swing.JComponent;
  45: import javax.swing.UIDefaults;
  46: import javax.swing.plaf.ColorUIResource;
  47: import javax.swing.plaf.ComponentUI;
  48: import javax.swing.text.Element;
  49: import javax.swing.text.FieldView;
  50: import javax.swing.text.View;
  51: 
  52: public class BasicTextFieldUI extends BasicTextUI
  53: {
  54:   public BasicTextFieldUI()
  55:   {
  56:     super();
  57:   }
  58: 
  59:   public View create(Element elem)
  60:   {
  61:     return new FieldView(elem);
  62:   }
  63:   
  64:   public static ComponentUI createUI(JComponent c)
  65:   {
  66:     return new BasicTextFieldUI();
  67:   }
  68: 
  69:   /**
  70:    * Returns the prefix for entries in the {@link UIDefaults} table.
  71:    *
  72:    * @return "TextField"
  73:    */
  74:   protected String getPropertyPrefix()
  75:   {
  76:     return "TextField";
  77:   }
  78: 
  79:   public void installUI(JComponent c)
  80:   {
  81:     super.installUI(c);
  82:   }
  83: 
  84:   /**
  85:    * Receives notification whenever one of the text component's bound
  86:    * properties changes. Here we check for the editable and enabled
  87:    * properties and adjust the background color accordingly.
  88:    * 
  89:    * <p>The colors are only changed if they are not a
  90:    * <code>ColorUIResource</code>.</p>
  91:    *
  92:    * @param event the property change event
  93:    */
  94:   protected void propertyChange(PropertyChangeEvent event)
  95:   {
  96:     if (event.getPropertyName().equals("editable"))
  97:       {
  98:         // Changing the color only if the current background is an instance of
  99:         // ColorUIResource is the behavior of the RI.
 100:         if (textComponent.getBackground() instanceof ColorUIResource)
 101:           {
 102:             Color c = null;
 103:             Color old = textComponent.getBackground();
 104:             String prefix = getPropertyPrefix();
 105:             if (! textComponent.isEnabled())
 106:               c = SharedUIDefaults.getColor(prefix + ".disabledBackground");
 107:             if (c == null && ! textComponent.isEditable())
 108:               c = SharedUIDefaults.getColor(prefix + ".inactiveBackground");
 109:             if (c == null)
 110:               c = SharedUIDefaults.getColor(prefix + ".background");
 111:             if (c != null && c != old)
 112:               {
 113:                 textComponent.setBackground(c);
 114:               }
 115:           }
 116:       }
 117:   }
 118: }