@Override
      public void invokePopup(final Component comp, final int x, final int y) {
        final Content content = c instanceof BaseLabel ? ((BaseLabel)c).getContent() : null;
        ui.showContextMenu(comp, x, y, ui.window.createPopupGroup(), content);
      }
@Override
      public void invokePopup(final Component comp, final int x, final int y)