gtk-tree-view-hover-expand (object)

object -- a gtk-tree-view widget
expand -- true to enable hover selection mode

Accessor of the hover-expand slot of the gtk-tree-view class.

The slot access function gtk-tree-view-hover-expand returns whether hover expansion mode is turned on for the tree view. The slot access function (setf gtk-tree-view-hover-expand) enables or disables the hover expansion mode. Hover expansion makes rows expand or collapse if the pointer moves over them.