class kryObject;

/* Different callback types. Taking 0, 1 or 2 pointers to the ConnectSignal method. */
typedef void (*krySignalFunc0)(void *obj, void *invoke_data);
typedef void (*krySignalFunc1)(void *obj, void *invoke_data, void *connect_data);
typedef void (*krySignalFunc2)(void *obj, void *invoke_data, void *connect_data, void *connect_data2);

enum krySignalFuncType
{
  KRY_SIGNAL_FUNC0,
  KRY_SIGNAL_FUNC1,
  KRY_SIGNAL_FUNC2
};

struct krySignalFuncInfo
{
  union
  {
    krySignalFunc0 func0;
    krySignalFunc1 func1;
    krySignalFunc2 func2;
  };
  
  /* Data stored when the signal is connected */
  void *connect_data1;
  void *connect_data2;

  enum krySignalFuncType type;
};

class krySignal
{
public:
  krySignal();
  void operator =(krySignal & signal);
  ~krySignal();

  long Connect(krySignalFunc0 func);
  long Connect(krySignalFunc1 func, void *connect_data1);
  long Connect(krySignalFunc2 func, void *connect_data1, void *connect_data2);
  void Disconnect(void *func);
  void Disconnect(int id);
  void Enable();
  void Disable();
  void Invoke(kryObject *object, void *param);
private:
  kryList <struct krySignalFuncInfo *> m_funcs;
  gboolean m_disabled;
};