Eclipse插件开发：SWT之MenuExample

该例子演示了SWT界面下的Menu(菜单)构建及监听。

import org.eclipse.swt.SWT;
import org.eclipse.swt.events.SelectionAdapter;
import org.eclipse.swt.events.SelectionEvent;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Menu;
import org.eclipse.swt.widgets.MenuItem;
import org.eclipse.swt.widgets.Shell;

public class MenuExample {
	public static void main(String[] args) {
		Display display = new Display();
		final Shell shell = new Shell(display);
		shell.setText("Menu Example");
		shell.setBounds(100, 100, 200, 100);
		Menu bar = new Menu(shell, SWT.BAR);
		shell.setMenuBar(bar);
		MenuItem fileMenu = new MenuItem(bar, SWT.CASCADE);
		fileMenu.setText("&File");
		Menu subMenu = new Menu(shell, SWT.DROP_DOWN);
		fileMenu.setMenu(subMenu);
		MenuItem selectItem = new MenuItem(subMenu, SWT.NULL);
		selectItem.setText("&Select Me Now\tCtrl+S");
		selectItem.setAccelerator(SWT.CTRL + 'S');
		selectItem.addSelectionListener(new SelectionAdapter() {
			public void widgetSelected(SelectionEvent event) {
				System.out.println("I was selected!");
			}
		});
		//MenuItem sep = new MenuItem(subMenu, SWT.SEPARATOR);
		MenuItem exitItem = new MenuItem(subMenu, SWT.NULL);
		exitItem.setText("&Exit");
		exitItem.addSelectionListener(new SelectionAdapter() {
			public void widgetSelected(SelectionEvent event) {
				shell.dispose();
			}
		});
		shell.open();
		while (!shell.isDisposed()) {
			if (!display.readAndDispatch())
				display.sleep();
		}
		display.dispose();
	}
}