001/* BasicTextFieldUI.java
002   Copyright (C) 2004, 2006,  Free Software Foundation, Inc.
003
004This file is part of GNU Classpath.
005
006GNU Classpath is free software; you can redistribute it and/or modify
007it under the terms of the GNU General Public License as published by
008the Free Software Foundation; either version 2, or (at your option)
009any later version.
010
011GNU Classpath is distributed in the hope that it will be useful, but
012WITHOUT ANY WARRANTY; without even the implied warranty of
013MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
014General Public License for more details.
015
016You should have received a copy of the GNU General Public License
017along with GNU Classpath; see the file COPYING.  If not, write to the
018Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
01902110-1301 USA.
020
021Linking this library statically or dynamically with other modules is
022making a combined work based on this library.  Thus, the terms and
023conditions of the GNU General Public License cover the whole
024combination.
025
026As a special exception, the copyright holders of this library give you
027permission to link this library with independent modules to produce an
028executable, regardless of the license terms of these independent
029modules, and to copy and distribute the resulting executable under
030terms of your choice, provided that you also meet, for each linked
031independent module, the terms and conditions of the license of that
032module.  An independent module is a module which is not derived from
033or based on this library.  If you modify this library, you may extend
034this exception to your version of the library, but you are not
035obligated to do so.  If you do not wish to do so, delete this
036exception statement from your version. */
037
038
039package javax.swing.plaf.basic;
040
041import java.awt.Color;
042import java.beans.PropertyChangeEvent;
043
044import javax.swing.JComponent;
045import javax.swing.UIDefaults;
046import javax.swing.plaf.ColorUIResource;
047import javax.swing.plaf.ComponentUI;
048import javax.swing.text.Element;
049import javax.swing.text.FieldView;
050import javax.swing.text.View;
051
052public class BasicTextFieldUI extends BasicTextUI
053{
054  public BasicTextFieldUI()
055  {
056    super();
057  }
058
059  public View create(Element elem)
060  {
061    return new FieldView(elem);
062  }
063
064  public static ComponentUI createUI(JComponent c)
065  {
066    return new BasicTextFieldUI();
067  }
068
069  /**
070   * Returns the prefix for entries in the {@link UIDefaults} table.
071   *
072   * @return "TextField"
073   */
074  protected String getPropertyPrefix()
075  {
076    return "TextField";
077  }
078
079  public void installUI(JComponent c)
080  {
081    super.installUI(c);
082  }
083
084  /**
085   * Receives notification whenever one of the text component's bound
086   * properties changes. Here we check for the editable and enabled
087   * properties and adjust the background color accordingly.
088   *
089   * <p>The colors are only changed if they are not a
090   * <code>ColorUIResource</code>.</p>
091   *
092   * @param event the property change event
093   */
094  protected void propertyChange(PropertyChangeEvent event)
095  {
096    if (event.getPropertyName().equals("editable"))
097      {
098        // Changing the color only if the current background is an instance of
099        // 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}