001/* BasicTextAreaUI.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
041
042import java.beans.PropertyChangeEvent;
043
044import javax.swing.JComponent;
045import javax.swing.JTextArea;
046import javax.swing.UIDefaults;
047import javax.swing.plaf.ComponentUI;
048import javax.swing.text.Element;
049import javax.swing.text.PlainView;
050import javax.swing.text.View;
051import javax.swing.text.WrappedPlainView;
052
053public class BasicTextAreaUI extends BasicTextUI
054{
055  public static ComponentUI createUI(JComponent comp)
056  {
057    return new BasicTextAreaUI();
058  }
059
060  public BasicTextAreaUI()
061  {
062    // Nothing to do here.
063  }
064
065  /**
066   * Create the view.  Returns a WrappedPlainView if the text area
067   * has lineWrap set to true, otherwise returns a PlainView.  If
068   * lineWrap is true has to check whether the wrap style is word 
069   * or character and return an appropriate WrappedPlainView.
070   * 
071   * @param elem the element to create a View for
072   * @return an appropriate View for the element
073   */
074  public View create(Element elem)
075  {
076    JTextArea comp = (JTextArea) getComponent();
077    if (comp.getLineWrap())
078      {
079        if (comp.getWrapStyleWord())
080          return new WrappedPlainView(elem, true);
081        else
082          return new WrappedPlainView(elem, false);
083      }
084    else
085      return new PlainView(elem);
086  }
087
088  /**
089   * Returns the prefix for entries in the {@link UIDefaults} table.
090   *
091   * @return "TextArea"
092   */
093  protected String getPropertyPrefix()
094  {
095    return "TextArea";
096  }
097  
098  /**
099   * Receives notification whenever one of the text component's bound
100   * properties changes. This changes the view to WrappedPlainView
101   * if setLineWrap(true) is called, and back to PlainView if 
102   * setLineWrap(false) is called.
103   *
104   * @param ev the property change event
105   */
106  protected void propertyChange(PropertyChangeEvent ev)
107  {
108    JTextArea comp = (JTextArea) getComponent();
109    if (ev.getPropertyName() == "lineWrap"
110        || ev.getPropertyName() == "wrapStyleWord")
111      {
112        // Changes the View (without modifying the document or it's listeners).
113        setView(create(textComponent.getDocument().getDefaultRootElement()));
114      }
115  }
116}