/*
 * Copyright (c) 2000, 2002 IBM Corp.  All rights reserved.
 * This file is made available under the terms of the Common Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/cpl-v10.html
 */
 
import org.eclipse.swt.SWT;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Event;
import org.eclipse.swt.widgets.Listener;
import org.eclipse.swt.widgets.Menu;
import org.eclipse.swt.widgets.MenuItem;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.swt.widgets.Tree;
import org.eclipse.swt.widgets.TreeItem;

public class Snippet0073 {

public static void main (String [] args) {
	Display display = new Display ();
	Shell shell = new Shell (display);
	final Tree tree = new Tree (shell, SWT.BORDER | SWT.MULTI);
	final Menu menu = new Menu (shell, SWT.POP_UP);
	tree.setMenu (menu);
	for (int i=0; i <12; i++) {
		TreeItem treeItem = new TreeItem (tree, SWT.NULL);
		treeItem.setText ("Item " + i);
		MenuItem menuItem = new MenuItem (menu, SWT.PUSH);
		menuItem.setText (treeItem.getText ());
	}
	menu.addListener (SWT.Show, new Listener () {
		public void handleEvent (Event event) {
			MenuItem [] menuItems = menu.getItems ();
			TreeItem [] treeItems = tree.getSelection ();
			for (int i=0; i <menuItems.length; i++) {
				String text = menuItems [i].getText ();
				int index = 0;
				while (index <treeItems.length) {
					if (treeItems [index].getText ().equals (text)) break;
					index++;
				}
				menuItems [i].setEnabled (index != treeItems.length);
			}
		}
	});
	tree.setSize (200, 200);
	shell.setSize (300, 300);
	shell.open ();
	while (!shell.isDisposed ()) {
		if (!display.readAndDispatch ()) display.sleep ();
	}
	display.dispose ();
}
}