@Override
      protected void updateLayoutState() {
        super.updateLayoutState();

        Insets insets = list.getInsets();
        int listWidth = list.getWidth() - (insets.left + insets.right);
        if (listWidth >= cellWidth) {
          int columnCount = listWidth / cellWidth;
          cellWidth = (columnCount == 0) ? 1 : listWidth / columnCount;
        }
      }
@Override
      protected void updateLayoutState()