/*
*------------------------------------------------------------------------------
* Copyright (C) 2014 University of Dundee. All rights reserved.
*
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*
*------------------------------------------------------------------------------
*/
package org.openmicroscopy.shoola.util.ui;
//Java imports
import javax.swing.JTextField;
import javax.swing.text.AttributeSet;
import javax.swing.text.BadLocationException;
import javax.swing.text.Document;
import javax.swing.text.PlainDocument;
/**
* A text field with a limited number of characters.
*
* @author Jean-Marie Burel
* <a href="mailto:j.burel@dundee.ac.uk">j.burel@dundee.ac.uk</a>
* @since 5.0
*/
public class TextFieldLimit
extends JTextField
{
/** The maximum number of characters.*/
private int limit;
public TextFieldLimit(int limit)
{
this.limit = limit;
}
/**
* Returns the model with a limit.
*/
protected Document createDefaultModel() {
return new LimitDocument();
}
/**
* Limits the number of characters that can be entered.
*/
private class LimitDocument extends PlainDocument {
public void insertString( int offset, String str, AttributeSet attr )
throws BadLocationException {
if (str == null) return;
if ((getLength() + str.length()) <= limit) {
super.insertString(offset, str, attr);
}
}
}
}