Object Hierarchy

    GObject
        GInitiallyUnowned
            GtkObject
                GtkWidget
                    GtkContainer
                        GtkBox
                            GtkVBox
                                GimpPreview
                                    GimpAspectPreview
                                    GimpScrolledPreview
                                        GimpDrawablePreview
                                        GimpZoomPreview
                            GtkHBox
                                GimpSelectButton
                                    GimpBrushSelectButton
                                    GimpFontSelectButton
                                    GimpGradientSelectButton
                                    GimpPaletteSelectButton
                                    GimpPatternSelectButton
                        GtkBin
                            GtkComboBox
                                GimpIntComboBox
                                    GimpChannelComboBox
                                    GimpDrawableComboBox
                                    GimpImageComboBox
                                    GimpLayerComboBox
                                    GimpVectorsComboBox
                            GtkWindow
                                GtkDialog
                                    GimpDialog
                                        GimpProcBrowserDialog
                    GtkProgress
                        GtkProgressBar
                            GimpProgressBar