if (cm.isSortable(colIndex)) {
MenuItem item = new MenuItem();
item.setText(DefaultMessages.getMessages().gridView_sortAscText());
item.setIcon(header.getAppearance().sortAscendingIcon());
item.addSelectionHandler(new SelectionHandler<Item>() {
@Override
public void onSelection(SelectionEvent<Item> event) {
doSort(colIndex, SortDir.ASC);