content: /* ========================================================================
   * JCommon : a free general purpose class library for the Java(tm) platform
   * ========================================================================
   *
   * (C) Copyright 2000-2005, by Object Refinery Limited and Contributors.
   * 
   * Project Info:  http://www.jfree.org/jcommon/index.html
   *
   * This library is free software; you can redistribute it and/or modify it 
   * under the terms of the GNU Lesser General Public License as published by 
   * the Free Software Foundation; either version 2.1 of the License, or 
   * (at your option) any later version.
   *
   * This library is distributed in the hope that it will be useful, but 
   * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY 
   * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public 
   * License for more details.
   *
   * You should have received a copy of the GNU Lesser General Public
   * License along with this library; if not, write to the Free Software
   * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, 
   * USA.  
   *
   * [Java is a trademark or registered trademark of Sun Microsystems, Inc. 
   * in the United States and other countries.]
   * 
   * --------------------
   * IntegerDocument.java
   * --------------------
   * (C) Copyright 2000-2004, by Andrzej Porebski.
   *
   * Original Author:  Andrzej Porebski;
   * Contributor(s):   -;
   *
   * $Id: IntegerDocument.java,v 1.3 2005/11/16 15:58:41 taqua Exp $
   *
   * Changes (from 7-Nov-2001)
   * -------------------------
   * 07-Nov-2001 : Added to com.jrefinery.ui package (DG);
   * 14-Oct-2002 : Fixed errors reported by Checkstyle (DG);
   *
   */
  
  package org.jfree.ui;
  
  import javax.swing.text.AttributeSet;
  import javax.swing.text.BadLocationException;
  import javax.swing.text.PlainDocument;
  
  /**
   * A document for editing integers.
   *
   * @author Andrzej Porebski
   */
  public class IntegerDocument extends PlainDocument {
  
      /**
       * Inserts a string.
       *
       * @param i  i.
       * @param s  s.
       * @param attributes  the attributes.
       *
       * @throws BadLocationException ??
       */
      public void insertString(final int i, final String s, final AttributeSet attributes)
          throws BadLocationException {
  
          super.insertString(i, s, attributes);
          if (s != null && (!s.equals("-") || i != 0 || s.length() >= 2)) {
              try {
                  Integer.parseInt(getText(0, getLength()));
              }
              catch (NumberFormatException e) {
                  remove(i, s.length());
              }
          }
      }
  
  }
  