Heyta neponiatnaia

class Registration
{
public:
    void callback(void)
    {
        callback_();
    }
    void setCallback ((*callback)(void));
    void addToEventSystem(int ID,EventSystem &eventSystem);

private:
    void (*callback_)(void);
};



class EventSystem
{
public:
    void register(int ID, Registration* registration);
    void unRegister(int ID, Registration* registration);
    void addNotificationToQueue(int ID);
    void addNotificationToSchedule(int ID, int NotificationTime);
    void processQueuedNotifications(void);
    void processNextScheduled(void);
    int getCurrentTime(void);

private:
    //placeholder types
    <list> notificationQueue;
    <binaryheap> notificationSchegule;
};

class ReceiverObject
{
public:
    void doStuff(void);
    void initialize(void)
    {
        keyPressRegistration.setCallback(doStuff);
        //multiple registrations with different ID:s to same eventsystem possible
        keyPressRegistration.addToEventSystem(1234,eventSystem);
        keyPressRegistration.addToEventSystem(42,eventSystem);
    }

private:
    Registration keyPressRegistration;
};
int main ()
{
   ReceiverObject receiverObject;
   EventSystem eventSystem;
   receiverObject.initialize();
   eventSystem.addNotificationToQueue(1234);
   eventSystem.processQueuedNotifications();
}