Container Objects Glade UI Containers How to add support for hierarchic widget relationships GtkContainer objects which parent GtkWidget objects have built-in detection in the glade core; but other container relationships may be constructed; if for example you wished to treat a GtkMenuBar --> GtkMenuItem relationship specially in the plugin; Any GObject can parent any GObject. The default GtkContainer --> GtkWidget relationship can also be modified for a GtkContainer derived object. Child support definitions are identified by the GType of supported child class and are embedded into a glade-widget-class block like so: Bar ... 'Foo --> Bar' container relationship parameters go here ... packing property definition for this container relationship ... more child definitions here ... ]]> Note that you can access and modify and even add virtual packing properties in exactly the same way as previously described with normal object properties. add-child-function A #GladeAddChildFunc used to add child objects from parent objects. remove-child-function A #GladeRemoveChildFunc used to remove child objects from parent objects. replace-child-function A #GladeReplaceChildFunc Used to swap placholders with project widgets. get-children-function A #GladeGetChildrenFunc to return a list of children for this container. If you have any anarchist internal children; they should be listed here along with normal children. child-set-property-function A #GladeChildSetPropertyFunc to set a packing property on this child. child-get-property-function A #GladeChildGetPropertyFunc to get a packing property on this child. special-child-type A special type identifier that will indicate whether this is an alternate child type; such as a notebook tab label or a frame label. The value of special-child-type is the name of the added packing property for this child type; you must then use the type to add children to the "correct port" at load time. Currently this isnt very neatly done; you must do: g_object_set_data (child, "special-child-type", type); when creating special child types and handle it on replace-child; look at glade-gtk.c for examples.