MenuItem moveRowUp = new MenuItem(popupMenu, SWT.PUSH);
moveRowUp.setText(msg.commandDocumentsMoveUpName);
moveRowUp.setImage(Icon.COMMAND_UP.getImage(IconSize.DefaultIconSize));
moveRowUp.setEnabled(true);
moveRowUp.setAccelerator(SWT.ALT + SWT.ARROW_UP); // doesn't work at the moment 

moveRowUp.addSelectionListener(new SelectionAdapter() {

/**
* Move an item up or down
*/
@Override
public void widgetSelected(SelectionEvent e) {
  NatEventData natEventData = MenuItemProviders.getNatEventData(e);
  // Get the position of the selected element
  NatTable natTable = natEventData.getNatTable();
  int pos = natEventData.getRowPosition() - 1;  // count without header row
  // Do not move one single item
    if (natTable.getRowCount() > 2 && pos > 0) {  // the header row has to be added for this calculation!
       ILayerCommand cmd = new RowReorderCommand(gridListLayer.getBodyLayerStack().getRowReorderLayer(), pos, pos - 1);
       natTable.doCommand(cmd);natTable.refresh();
    }
  }
});

        this.sortedList = new SortedList<T>(rowObjectsGlazedList, null);
        this.bodyDataProvider = new GlazedListsDataProvider<T>(sortedList, columnPropertyAccessor);
        this.bodyDataLayer = new DataLayer(bodyDataProvider);
        HoverLayer hoverLayer = new HoverLayer(bodyDataLayer);
        glazedListsEventLayer = new GlazedListsEventLayer<T>(hoverLayer, sortedList);
        rowReorderLayer = new RowReorderLayer(hoverLayer);
        this.selectionLayer = new SelectionLayer(rowReorderLayer);
        RowSelectionModel<T> selectionModel = new RowSelectionModel<T>(selectionLayer, bodyDataProvider, rowIdAccessor, false);
        selectionLayer.setSelectionModel(selectionModel);
        selectionLayer.addConfiguration(new RowOnlySelectionConfiguration<T>());       
        ViewportLayer viewportLayer = new ViewportLayer(selectionLayer);
        setUnderlyingLayer(viewportLayer);

int pos = natEventData.getRowPosition();
if (natTable.getRowCount() > 2 && pos > 0) {  
       ILayerCommand cmd = new RowReorderCommand(natTable, pos, pos - 1);
       natTable.doCommand(cmd);
}

natTable.getUiBindingRegistry().registerFirstMouseDownBinding(
         new MouseEventMatcher(SWT.NONE, GridRegion.BODY, MouseEventMatcher.RIGHT_BUTTON),

                new IMouseAction() {

                    ViewportSelectRowAction selectRowAction = new ViewportSelectRowAction(false, false);
                                
                    @Override
                    public void run(NatTable natTable, MouseEvent event) {
                        int rowPosition = natTable.getRowPositionByY(event.y);
                        if(!selectionLayer.isRowPositionSelected(rowPosition)) {
                            selectRowAction.run(natTable, event);
                        }                   
                    }
                });

natTable.getUiBindingRegistry().registerMouseDownBinding(new MouseEventMatcher(SWT.NONE, GridRegion.BODY, MouseEventMatcher.RIGHT_BUTTON), new PopupMenuAction(e4Menu));