Java tutorial
/******************************************************************************* * 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; /* * Tracker example snippet: create a tracker (drag on mouse down) * * For a list of all SWT example snippets see * http://www.eclipse.org/swt/snippets/ */ import org.eclipse.swt.*; import org.eclipse.swt.graphics.*; import org.eclipse.swt.widgets.*; public class Snippet23 { public static void main(String[] args) { Display display = new Display(); final Shell shell = new Shell(display); shell.setText("Snippet 23"); shell.open(); shell.addListener(SWT.MouseDown, e -> { Tracker tracker = new Tracker(shell, SWT.NONE); tracker.setRectangles(new Rectangle[] { new Rectangle(e.x, e.y, 100, 100), }); tracker.open(); }); while (!shell.isDisposed()) { if (!display.readAndDispatch()) display.sleep(); } display.dispose(); } }