Source for javax.swing.plaf.basic.BasicTextAreaUI

   1: /* BasicTextAreaUI.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: 
  42: import java.beans.PropertyChangeEvent;
  43: 
  44: import javax.swing.JComponent;
  45: import javax.swing.JTextArea;
  46: import javax.swing.UIDefaults;
  47: import javax.swing.plaf.ComponentUI;
  48: import javax.swing.text.Element;
  49: import javax.swing.text.PlainView;
  50: import javax.swing.text.View;
  51: import javax.swing.text.WrappedPlainView;
  52: 
  53: public class BasicTextAreaUI extends BasicTextUI
  54: {
  55:   public static ComponentUI createUI(JComponent comp)
  56:   {
  57:     return new BasicTextAreaUI();
  58:   }
  59: 
  60:   public BasicTextAreaUI()
  61:   {
  62:     // Nothing to do here.
  63:   }
  64: 
  65:   /**
  66:    * Create the view.  Returns a WrappedPlainView if the text area
  67:    * has lineWrap set to true, otherwise returns a PlainView.  If
  68:    * lineWrap is true has to check whether the wrap style is word 
  69:    * or character and return an appropriate WrappedPlainView.
  70:    * 
  71:    * @param elem the element to create a View for
  72:    * @return an appropriate View for the element
  73:    */
  74:   public View create(Element elem)
  75:   {
  76:     JTextArea comp = (JTextArea) getComponent();
  77:     if (comp.getLineWrap())
  78:       {
  79:         if (comp.getWrapStyleWord())
  80:           return new WrappedPlainView(elem, true);
  81:         else
  82:           return new WrappedPlainView(elem, false);
  83:       }
  84:     else
  85:       return new PlainView(elem);
  86:   }
  87: 
  88:   /**
  89:    * Returns the prefix for entries in the {@link UIDefaults} table.
  90:    *
  91:    * @return "TextArea"
  92:    */
  93:   protected String getPropertyPrefix()
  94:   {
  95:     return "TextArea";
  96:   }
  97:   
  98:   /**
  99:    * 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: }