snippet245.java

来自「Eclipse JAVA开发软件中SWT各控件范例源码」· Java 代码 · 共 43 行

/*******************************************************************************
 * Copyright (c) 2000, 2006 IBM Corporation and others.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *     IBM Corporation - initial API and implementation
 *******************************************************************************/
package org.eclipse.swt.snippets;

/* 
 * Canvas snippet: paint a circle in a canvas
 *
 * For a list of all SWT example snippets see
 * http://www.eclipse.org/swt/snippets/
 */

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

public class Snippet245 {

public static void main(String [] args) {
	final Display display = new Display();
	final Shell shell = new Shell(display);
	shell.addPaintListener(new PaintListener() {
		public void paintControl(PaintEvent event) {
			Rectangle rect = shell.getClientArea();
			event.gc.drawOval(0, 0, rect.width - 1, rect.height - 1);
		}
	});
	shell.setBounds(10, 10, 200, 200);
	shell.open ();
	while (!shell.isDisposed()) {
		if (!display.readAndDispatch()) display.sleep();
	}
	display.dispose();
}
}