    001/* ========================================================================
    002 * JCommon : a free general purpose class library for the Java(tm) platform
    003 * ========================================================================
    004 *
    005 * (C) Copyright 2000-2005, by Object Refinery Limited and Contributors.
    006 *
    007 * Project Info:  http://www.jfree.org/jcommon/index.html
    008 *
    009 * This library is free software; you can redistribute it and/or modify it
    010 * under the terms of the GNU Lesser General Public License as published by
    011 * the Free Software Foundation; either version 2.1 of the License, or
    012 * (at your option) any later version.
    013 *
    014 * This library is distributed in the hope that it will be useful, but
    015 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
    016 * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
    017 * License for more details.
    018 *
    019 * You should have received a copy of the GNU Lesser General Public
    020 * License along with this library; if not, write to the Free Software
    021 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301,
    022 * USA.
    023 *
    024 * [Java is a trademark or registered trademark of Sun Microsystems, Inc.
    025 * in the United States and other countries.]
    026 *
    027 * --------------------
    028 * IntegerDocument.java
    029 * --------------------
    030 * (C) Copyright 2000-2004, by Andrzej Porebski.
    031 *
    032 * Original Author:  Andrzej Porebski;
    033 * Contributor(s):   -;
    034 *
    035 * $Id: IntegerDocument.java,v 1.3 2005/11/16 15:58:41 taqua Exp $
    036 *
    037 * Changes (from 7-Nov-2001)
    038 * -------------------------
    039 * 07-Nov-2001 : Added to com.jrefinery.ui package (DG);
    040 * 14-Oct-2002 : Fixed errors reported by Checkstyle (DG);
    041 *
    042 */
    043
    044package org.jfree.ui;
    045
    046import javax.swing.text.AttributeSet;
    047import javax.swing.text.BadLocationException;
    048import javax.swing.text.PlainDocument;
    049
    050/**
    051 * A document for editing integers.
    052 *
    053 * @author Andrzej Porebski
    054 */
    055public class IntegerDocument extends PlainDocument {
    056
    057    /**
    058     * Inserts a string.
    059     *
    060     * @param i  i.
    061     * @param s  s.
    062     * @param attributes  the attributes.
    063     *
    064     * @throws BadLocationException ??
    065     */
    066    public void insertString(final int i, final String s, final AttributeSet attributes)
    067        throws BadLocationException {
    068
    069        super.insertString(i, s, attributes);
    070        if (s != null && (!s.equals("-") || i != 0 || s.length() >= 2)) {
    071            try {
    072                Integer.parseInt(getText(0, getLength()));
    073            }
    074            catch (NumberFormatException e) {
    075                remove(i, s.length());
    076            }
    077        }
    078    }
    079
    080}