/*
 * Copyright (c) 2000, 2002 IBM Corp.  All rights reserved.
 * This file is made available under the terms of the Common Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/cpl-v10.html
 */

import org.eclipse.swt.SWT;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Event;
import org.eclipse.swt.widgets.Listener;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.swt.widgets.Text;

public class Snippet19 {

public static void main (String [] args) {
	Display display = new Display ();
	Shell shell = new Shell (display);
	Text text = new Text (shell, SWT.BORDER | SWT.V_SCROLL);
	text.setBounds (10, 10, 200, 200);
	text.addListener (SWT.Verify, new Listener () {
		public void handleEvent (Event e) {
			String text = e.text;
			char [] chars = new char [text.length ()];
			text.getChars (0, chars.length, chars, 0);
			for (int i=0; i <chars.length; i++) {
				if (!('0' <= chars [i] && chars [i] <= '9')) {
					e.doit = false;
					return;
				}
			}
		}
	});
	shell.open ();
	while (!shell.isDisposed()) {
		if (!display.readAndDispatch ()) display.sleep ();
	}
	display.dispose ();
}
}