@Override
		public void handleEvent(Event event) {
			TreeItem item = (TreeItem)event.item;
			TreeItem parentItem = item.getParentItem();
			String text = null;
			if (parentItem == null) {
				text = "node "+tree.indexOf(item);
			} else {
				text = parentItem.getText()+" - "+parentItem.indexOf(item);
			}
			item.setText(text);
			item.setItemCount(10);
		}