SMART datagrid v.1 > Classes > OperateOptions
When the user doing row grouping, if groupSorting is true, it will be sorted based on the corresponding field, and at this point, he can specify the sorting direction by SortDirection constant.
Defaults to SortDirection.ASCENDING.
grid.setOperateOptions({
groupSorting: true,
groupSortCase: DataLudi.SortDirection.ASCENDING,
groupSortDirection: DataLudi.SortCase.SENSITIVE
});