// r: voidfunc(col, row)
static JTable onTableCellLeftClick(final JTable table, final VF2<Int, Int> r) {
  swing {
    table.addMouseListener(new MouseAdapter {
      public void mouseClicked(MouseEvent evt) {
        if (evt.getButton() == 1 && evt.getClickCount() == 1) {
          int row = table.rowAtPoint(evt.getPoint());
          int col = table.columnAtPoint(evt.getPoint());
          table.setRowSelectionInterval(row, row);
          callF(r, col, row);
        }
      }
    });
  }
  ret table;
}