gtkmm2: gtkmm2: gtkmm is the official C++ interface for the popular GUI library gtkmm2: GTK+. Highlights include typesafe callbacks, and a comprehensive set gtkmm2: of widgets that are easily extensible via inheritance. gtkmm2: gtkmm2: Homepage: http://www.gtkmm.org/ gtkmm2: gtkmm2: gtkmm2: gtkmm2: