is there a way to enable keyboard navigation between GridItem(s) ?

[0xkarambit]

I am trying to add a way to be able to navigate through the StackGrid using arrow keys, but i could'nt land on any ideas.
is there a way that i could achieve this ?

i want the focus to change to the next GridItem depending on the arrow pressed.
but i couldnt find a way to determine the index/key of the item because the grid can have variable number of columns.