Combined search and combobox?

[Dov Grobgeld <dov grobgeld gmail com>]

Is there a widget that combines a searchbox with a combobox?

A use case would be to search for a fontname in a very long font list.

I would like to be able to type a search string, and have the opened combobox display only entries that match the typed string. A plus would be if it is possible to change how matches take place, e.g. between multiple word (like helm-mode in emacs), a regular _expression_, or an absolute match.

Has someone written anything like that?

Regards,

Dov