gtk_tree_view_column_set_alignment (column, 0.0);
gtk_tree_view_column_set_fixed_width (column, 45);
gtk_tree_view_append_column (
gtk_tree_view_column_set_alignment (column, 0.0);
gtk_tree_view_column_set_fixed_width (column, 45);
gtk_tree_view_append_column (