Object Hierarchy

    GObject
        GtkObject
            GtkWidget
                GtkContainer
                    GtkTable
                        GimpPreview
                            GimpDrawablePreview
                GtkProgress
                    GtkProgressBar
                        GimpProgressBar
            GtkAdjustment
        GtkStyle
        GdkDragContext
        GdkScreen
    GInterface
        AtkImplementorIface