row_activated and modifiers keys

["Tiberius DULUMAN" <tiberius duluman gmail com>]

On the handler of the row_activated signal of the TreeView,
I need to implement different behaviour if CTRL or SHIFT key
is pressed. ( ie. when double-clicking a row something is
happening, and when double-clicking it and SHIFT key is pressed
something else should happen ).
Does anyone have any idea how can I implement this, please?

Thanks