gtk-cell-area-focus-from-sibling (area renderer)

area -- a gtk-cell-area object
renderer -- a gtk-cell-renderer object

The gtk-cell-renderer object for which renderer is a sibling, or nil.

Gets the cell renderer which is expected to be focusable for which renderer is, or may be a sibling.

This is handy for gtk-cell-area subclasses when handling events, after determining the cell renderer at the event location it can then chose to activate the focus cell for which the event cell may have been a sibling.