- widget
- the property the widget to set the property on.
- prop_name
- the name of the property.
- value_name
- the name of the widget used as the value for the property.
Some widgets have properties of type Gtk.Widget. These are represented as the widget name in the glade file. When constructing the interface, the widget specified as the value for a property may not exist yet.
Rather than setting the property directly, this function should be used. It will perform the name to Gtk.Widget conversion, and if the widget is yet to be constructed, defer setting the property until the widget is constructed.