@Override
        public boolean onClick(@NotNull MouseEvent e, int clickCount) {
          if (e.getButton() == MouseEvent.BUTTON3) return false;
          if (myTable.getRowCount() > 0) {
            final int row = myTable.rowAtPoint(e.getPoint());
            final int col = myTable.columnAtPoint(e.getPoint());

            if (row != -1 && col == ((myTable.getColumnCount() - 1) / 2)) {
              changeOperationForSelection();
            }
          }
          return true;
        }
@Override
        public boolean onClick(@NotNull MouseEvent e, int clickCount)