## Object Hierarchy

        GObject
            GInitiallyUnowned
                GtkObject
                    GtkWidget
                        GtkContainer
                            GtkBox
                                GtkVBox
                                    GimpPreview
                                        GimpAspectPreview
                                        GimpScrolledPreview
                                            GimpDrawablePreview
                        GtkProgress
                            GtkProgressBar
                                GimpProgressBar