Object Hierarchy

    GObject
        GtkObject
            GtkWidget
                GtkContainer
                    GtkBox
                        GtkVBox
                            GimpPreview
                                GimpAspectPreview
                                GimpScrolledPreview
                                    GimpDrawablePreview
                    GtkBin
                        GtkComboBox
                            GimpIntComboBox
                                GimpChannelComboBox
                                GimpDrawableComboBox
                                GimpImageComboBox
                                GimpLayerComboBox
                        GtkButton
                            GimpFontSelectButton
                GtkProgress
                    GtkProgressBar
                        GimpProgressBar