I just saw this thread:. Not necessarily. You can still show Col_2 cell value even if Col_1 was clicked the way it is now. Usually it is the value of the cell you click that you are interested in, but what if Col_2 is disabled, you cannot click on it, but if you click on a cell in Col_1, you can still get the value in Col_2 cell.
Sub B4XTable1_CellClicked (ColumnId As String, RowId As Long)
Dim RowData As Map = B4XTable1.GetRow(RowId)
Dim cell As String = RowData.Get("Col_2") 'You can still show Col_2 cell value even if Col_1 was clicked
' Dim cell As String = RowData.Get(ColumnId)
Log(cell)
End Sub