tests/org.eclipse.swt.tests.gtk/ManualTests/org/eclipse/swt/tests/gtk/snippets/Bug496639_DialogFullScreenShell.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.SWT;
import org.eclipse.swt.graphics.Point;
import org.eclipse.swt.graphics.Rectangle;
import org.eclipse.swt.layout.FillLayout;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.*;

/**
 * @author Thomas Singer
 */
public class Bug496639_DialogFullScreenShell {

	public static void main(String[] args) {
		Display display = new Display();

		Shell shell = new Shell(display);
		shell.setLayout(new GridLayout());

		Menu menuBar = new Menu(shell, SWT.BAR);
		MenuItem fileMenuItem = new MenuItem(menuBar, SWT.CASCADE);
		fileMenuItem.setText("File");
		Menu fileMenu = new Menu(fileMenuItem);
		fileMenuItem.setMenu(fileMenu);

		MenuItem toggleFullScreenMenuItem = new MenuItem(fileMenu, SWT.CHECK);
		toggleFullScreenMenuItem.setText("Toggle full screen");
		toggleFullScreenMenuItem.addListener(SWT.Selection, new Listener() {
			@Override
			public void handleEvent(Event event) {
				shell.setFullScreen(toggleFullScreenMenuItem.getSelection());
			}
		});

		MenuItem showDialogMenuItem = new MenuItem(fileMenu, SWT.PUSH);
		showDialogMenuItem.setText("Show dialog");
		showDialogMenuItem.addListener(SWT.Selection, new Listener() {
			@Override
			public void handleEvent(Event event) {
				Shell dialogShell = new Shell(shell, SWT.DIALOG_TRIM | SWT.PRIMARY_MODAL);
				dialogShell.setLayout(new FillLayout());

				Text text = new Text(dialogShell, SWT.BORDER);
				text.setText("Hello world!");

				// center on top of parent widget.shell
				Point size = dialogShell.computeSize(SWT.DEFAULT, SWT.DEFAULT);
				Rectangle bounds = shell.getBounds();
				dialogShell.setBounds(bounds.x + (bounds.width - size.x) / 2,
						bounds.y + (bounds.height - size.y) / 2,
						size.x, size.y);
				dialogShell.open();
//                dialogShell.forceActive();
//                dialogShell.moveAbove(widget.shell);
			}
		});

		shell.setMenuBar(menuBar);

		shell.setSize(300, 200);
		shell.open();

		while (!shell.isDisposed()) {
			if (!display.readAndDispatch()) {
				display.sleep();
			}
		}

		display.dispose();
	}
}