import org.eclipse.swt.SWT;
import org.eclipse.swt.layout.FillLayout;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Event;
import org.eclipse.swt.widgets.ExpandBar;
import org.eclipse.swt.widgets.ExpandItem;
import org.eclipse.swt.widgets.Listener;
import org.eclipse.swt.widgets.Menu;
import org.eclipse.swt.widgets.MenuItem;
import org.eclipse.swt.widgets.Shell;

public class ExpandBarExample {
	private static int counter;
	private static ExpandBar expandBar;

	public static void main(String[] args) {
		Display display = new Display();
		Shell shell = new Shell(display);
		shell.setLayout(new FillLayout());
		shell.setText("Expand bar example");
		createMenuBar(shell);
		expandBar = new ExpandBar(shell, SWT.V_SCROLL);
		for (counter=0; counter < 3;counter++) {
			createExpandItem(expandBar, "item " + String.valueOf(counter));
		}
		shell.open();
	    while (!shell.isDisposed())
	    {
	        if (!display.readAndDispatch())
	        {
	            display.sleep();
	        }
	    }
	    display.dispose();
	}
	
	private static void createMenuBar(Shell shell) {
		Menu menubar = new Menu(shell, SWT.BAR);
		shell.setMenuBar(menubar);
		MenuItem fileItem = new MenuItem(menubar, SWT.CASCADE);
		fileItem.setText("&File");
		Menu submenu = new Menu(shell, SWT.DROP_DOWN);
		fileItem.setMenu(submenu);
		MenuItem item = new MenuItem(submenu, SWT.PUSH);
		item.setText("New ExpandItem");
		item.addListener(SWT.Selection, new Listener() {
			@Override
			public void handleEvent(Event event) {
				createExpandItem(expandBar, "item " + String.valueOf(counter++));				
			}
			
		});

	}
	private static void createExpandItem(ExpandBar bar, String text) {
		ExpandItem item = new ExpandItem(bar, SWT.NONE);
		item.setText(text);
	}
}