- sigc::signal<void, int, int, unsigned, unsigned> signal_button_press;
- sigc::signal<void, int, int, unsigned, unsigned> signal_button_release;
- sigc::signal<void, int, int> signal_pointer_motion;
- sigc::signal<void, unsigned, unsigned, unsigned> signal_key_press;
- sigc::signal<void, unsigned, unsigned> signal_key_release;
- sigc::signal<void, unsigned, unsigned> signal_resize;