Examples of ComboBox using an explicit model?

[James Tappin <jtappin gmail com>]

I am currently trying to implement combobox cell renderers in the
high-level gtk-fortran code. Unfortunately unlike "normal" comboboxes where
there is the convenience type of GtkComboBoxText this is not available for
cell renderers.

I have hunted for examples of a working combobox that uses an explicit tree
model without any success. Does anybody on this list have such an example
(or even better, of a CellRendererCombo) that they would be willing to
share.

James