GtkAdjustment* adj = range->adjustment;
adj->step_increment = 1;
adj->page_increment =
adj->page_size = page_size;
gtk_range_set_range(range, 0, upper);
GtkAdjustment* adj = range->adjustment;
adj->step_increment = 1;
adj->page_increment =
adj->page_size = page_size;
gtk_range_set_range(range, 0, upper);