Sets the GtkCellLayoutDataFunc to use for cell_layout.
This function is used instead of the standard attributes mapping
for setting the column value, and should set the value of cell_layout's
cell renderer(s) as appropriate.
func may be NULL to remove a previously set function.
Since 2.4
Sets the GtkCellLayoutDataFunc to use for cell_layout. This function is used instead of the standard attributes mapping for setting the column value, and should set the value of cell_layout's cell renderer(s) as appropriate. func may be NULL to remove a previously set function. Since 2.4