libsigc++: Libsigc++ (C++ Callback System Library)
libsigc++:
libsigc++: Libsigc++ implements a typesafe  callback  system  for  standard
libsigc++: C++ It allows you to define  signals and to connect those signals
libsigc++: to any callback function, either global or a member function,
libsigc++: regardless of whether it is static or virtual.
libsigc++:
libsigc++:
libsigc++:
libsigc++:
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