This should be called by the area's owning layout widget
when focus is to be passed to area, or moved within area
for a given direction and row data.
Implementing GtkCellArea classes should implement this
method to receive and navigate focus in its own way particular
to how it lays out cells.
This should be called by the area's owning layout widget when focus is to be passed to area, or moved within area for a given direction and row data. Implementing GtkCellArea classes should implement this method to receive and navigate focus in its own way particular to how it lays out cells.