libsigc++: libsigc++: libsigc++ implements a typesafe callback system for standard C++. libsigc++: It allows you to define signals and to connect those signals to any libsigc++: callback function, either global or a member function, regardless libsigc++: of whether it is static or virtual. It also contains adaptor classes libsigc++: for connection of dissimilar callbacks. libsigc++: libsigc++: Homepage: https://github.com/libsigcplusplus/libsigcplusplus libsigc++: libsigc++: