Selection of multiple cells in FMX TStringGrid

[hsauro 35]

I've been trying to figure out how I can allow a user to select a block of cells in a FMX TStringGrid with a mouse drag operation. If one creates a FMX TStringGrid and adds columns, it only lets you select one cell at a time. 

The VCL TStringGrid has a goRangeSelection option but I can't find any options to select multiple cells in the FMX TStringGrid. Any suggestions? Also if multiple cells can be selected how does one determine which block of cells were selected?