createRowDragIcon
Creates a cairo_surface_t representation of the row at @path. This image is used for a drag icon.
Return
a newly-allocated surface of the drag icon.
Parameters
path
a GtkTreePath in @tree_view
Creates a cairo_surface_t representation of the row at @path. This image is used for a drag icon.
a newly-allocated surface of the drag icon.
a GtkTreePath in @tree_view