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 }