[Qt-interest] How to disable combo box list items?

[Robert Hairgrove]

What would be the easiest way of graying out list items similar to when 
a menu item is disabled? I have a configuration dialog with stacked 
widgets selected by a combo box (a QComboBox created in QtDesigner).

In this particular case, I am offering database support for a limited 
number of interfaces: MySQL, MSAccess, ODBC and SQLite. The idea would 
be to keep the same code base accross different platforms, but maybe 
disable MSAccess support on Linux.

Looks like there is no built-in way to do this? I would really like to 
avoid subclassing the combo box, item delegates etc. if possible (LOTS 
of work involved there...).