examples/org.eclipse.swt.snippets/src/org/eclipse/swt/snippets/Snippet99.java

/*******************************************************************************
 * Copyright (c) 2000, 2016 IBM Corporation and others.
 *
 * This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License 2.0
 * which accompanies this distribution, and is available at
 * https://www.eclipse.org/legal/epl-2.0/
 *
 * SPDX-License-Identifier: EPL-2.0
 *
 * Contributors:
 *     IBM Corporation - initial API and implementation
 *******************************************************************************/
package org.eclipse.swt.snippets;

/*
 * Shell example snippet: prevent a shell from closing (prompt the user)
 *
 * For a list of all SWT example snippets see
 * http://www.eclipse.org/swt/snippets/
 */
import org.eclipse.swt.*;
import org.eclipse.swt.widgets.*;

public class Snippet99 {

public static void main (String [] args) {
	Display display = new Display ();
	final Shell shell = new Shell (display);
	shell.setText("Snippet 99");
	shell.addListener (SWT.Close, event -> {
		int style = SWT.APPLICATION_MODAL | SWT.YES | SWT.NO;
		MessageBox messageBox = new MessageBox (shell, style);
		messageBox.setText ("Information");
		messageBox.setMessage ("Close the shell?");
		event.doit = messageBox.open () == SWT.YES;
	});
	shell.pack ();
	shell.open();
	while (!shell.isDisposed ()) {
		if (!display.readAndDispatch ()) display.sleep ();
	}
	display.dispose ();
}
}