GtkObject
  GtkWidget
    GtkRange
      GtkScrollbar
        GtkVScrollbar
        GtkHScrollbar
      GtkScale
        GtkHScale
        GtkVScale
    GtkContainer
      GtkBin
        GtkButton
          GtkToggleButton
            GtkCheckButton
              GtkRadioButton
        GtkScrolledWindow
      GtkPaned
        GtkVPaned
        GtkHPaned
  GtkData
    GtkAdjustment