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C:/temp/src/j2k/QNX4/Fred/TrainData.hpp

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#include "Const.hpp"

class Data {

public:
    Data();
    Data( int i, void* obj, bool v,
          double t_start, double t_exp,
          double last, double norm );

    Data( Data& d );
    ~Data();

    int     id;
    void*   object;
    bool    valid;               // Is it expired ?

    void    setTimer( double t_exp );
    void    Expired();

protected:
    double  time_start;
    double  time_expire;
    double  last_update;         // in microseconds
    double  normal_update;       // Make an average 
                                 // if the delay is too long,
                                 // then refresh...

    virtual void Start()  = 0;   // Start Timer function
    virtual void Update() = 0;   // Update function

    virtual const bool operator== ( Data& d ) = 0;
};

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