Control();
Control(const ControlSource &);
Control(Device &, ControlSrcType, unsigned);
Control();
Control(const ControlSource &);
Control(Device &, ControlSrcType, unsigned);
void button_press(unsigned);
void button_release(unsigned);
void axis_motion(unsigned, float, float);
void button_press(unsigned);
void button_release(unsigned);
void axis_motion(unsigned, float, float);