#include class Knob; class Thermo; class AmpFrame : public QFrame { Q_OBJECT public: AmpFrame( QWidget * ); public Q_SLOTS: void setMaster( double v ); protected: void timerEvent( QTimerEvent * ); private: Knob *d_knbVolume; Knob *d_knbBalance; Knob *d_knbTreble; Knob *d_knbBass; Thermo *d_thmLeft; Thermo *d_thmRight; double d_master; };