TGtkRuler

type TGtkRuler = record

  widget: TGtkWidget;

  backing_store: PGdkPixmap;

  non_gr_exp_gc: PGdkGC;

  metric: PGtkRulerMetric;

  xsrc: gint;

  ysrc: gint;

  slider_size: gint;

  lower: gdouble;

  upper: gdouble;

  position: gdouble;

  max_size: gdouble;

end;