[gtkmm] Any easy way to write a cell renderer with a combo box it it.

[ZHOU DX <zhou_dx yahoo com>]

Hi everyone, 

Since Gtk::combo is neither a Gtk::CellEditable or
Gtk::Editable, it is not straightforward to fit it
into the Treeview interface as a cell renderer. I
tried to write a new "editable" widget that wraps a
combo, but it looks like I have to write a
correponding widget_Class to declare the widget as
editable which is really a pain.  
Anyone knows a easy way to do that?


cheers,

Dan


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