A text entry box with a prepopulated drop down list of values.
This widget is similar to a GtkComboBox with
the exception that the user is allowed to enter a value that is not
present in the choice list. It displays the selected value in a
GtkEntry so that user can modify an
exisiting value, or enter a new one.
Like, the GtkComboBox, this widget may have
an underlying model, or use the convenient
constructor. If you use a model, your model must always have a
text column that can be set by the
You may retrieve the text from the entry via the