we are using 5.13.0 version of QtitanDataGrid.
We have checked the API(setSelectionPolicy(GridSelectionPolicy policy)) provided for enabling the multiple row selection, multiple cell selection, but we have not found any enum/API which allowed multiple column selections.
Could you please let us know which API we need to use so that multiple columns selection is possible.
Grid does not have a special mode for selecting cells in a column. Implied that the selection of columns is a special case of the multiple cells selection.
I would suggest to catch the click on the table header via the columnClicked (ColumnClickEventArgs * args); and select the cells under the column: