This is a helper function for implementing DnD onto a gtk.ListBox
The passed in row will be highlighted via gtk_drag_highlight(),
and any previously highlighted row will be unhighlighted.
The row will also be unhighlighted when the widget gets
a drag leave event.
This is a helper function for implementing DnD onto a gtk.ListBox The passed in row will be highlighted via gtk_drag_highlight(), and any previously highlighted row will be unhighlighted.
The row will also be unhighlighted when the widget gets a drag leave event.