tests/org.eclipse.swt.tests.gtk/ManualTests/org/eclipse/swt/tests/gtk/snippets/Bug286244_ShellActivateLoop.java

/*******************************************************************************
 * Copyright (c) 2018 Red Hat 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:
 *     Red Hat - initial API and implementation
 *******************************************************************************/
package org.eclipse.swt.tests.gtk.snippets;


import org.eclipse.swt.events.*;
import org.eclipse.swt.widgets.*;

public class Bug286244_ShellActivateLoop {

	public static void main(String[] args) {
		final Display display= new Display();
		final Shell shell= new Shell(display);
		shell.addShellListener(new ShellAdapter() {
			@Override
			public void shellDeactivated(ShellEvent e) {
				System.out.println("shellDeactivated()");
				display.timerExec(2000, new Runnable() {
					@Override
					public void run() {
						System.out.println("forcing active");
						shell.forceActive();
						System.out.println("widget.shell is active: "
								+ (display.getActiveShell() == shell));
						System.out.println("forced active");
						try {
							Thread.sleep(5000);
						} catch (InterruptedException e) {
							e.printStackTrace();
						}
					}
				});
			}

			@Override
			public void shellActivated(ShellEvent e) {
				System.out.println("shellActivated()");
			}
		});

		shell.setSize(160, 100);
		shell.open();
		while (!shell.isDisposed()) {
			if (!display.readAndDispatch())
				display.sleep();
		}
		display.dispose();
	}
}