001    /* BasicTextAreaUI.java -- 
002       Copyright (C) 2004, 2006,  Free Software Foundation, Inc.
003    
004    This file is part of GNU Classpath.
005    
006    GNU Classpath is free software; you can redistribute it and/or modify
007    it under the terms of the GNU General Public License as published by
008    the Free Software Foundation; either version 2, or (at your option)
009    any later version.
010    
011    GNU Classpath is distributed in the hope that it will be useful, but
012    WITHOUT ANY WARRANTY; without even the implied warranty of
013    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
014    General Public License for more details.
015    
016    You should have received a copy of the GNU General Public License
017    along with GNU Classpath; see the file COPYING.  If not, write to the
018    Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
019    02110-1301 USA.
020    
021    Linking this library statically or dynamically with other modules is
022    making a combined work based on this library.  Thus, the terms and
023    conditions of the GNU General Public License cover the whole
024    combination.
025    
026    As a special exception, the copyright holders of this library give you
027    permission to link this library with independent modules to produce an
028    executable, regardless of the license terms of these independent
029    modules, and to copy and distribute the resulting executable under
030    terms of your choice, provided that you also meet, for each linked
031    independent module, the terms and conditions of the license of that
032    module.  An independent module is a module which is not derived from
033    or based on this library.  If you modify this library, you may extend
034    this exception to your version of the library, but you are not
035    obligated to do so.  If you do not wish to do so, delete this
036    exception statement from your version. */
037    
038    
039    package javax.swing.plaf.basic;
040    
041    
042    import java.beans.PropertyChangeEvent;
043    
044    import javax.swing.JComponent;
045    import javax.swing.JTextArea;
046    import javax.swing.UIDefaults;
047    import javax.swing.plaf.ComponentUI;
048    import javax.swing.text.Element;
049    import javax.swing.text.PlainView;
050    import javax.swing.text.View;
051    import javax.swing.text.WrappedPlainView;
052    
053    public 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    }