class DataChangeEvent:public QEvent {

  public:

    DataChangeEvent (QString msg_)

    :QEvent ((QEvent::Type) MSG_EVENT) {

        msg = msg_;

    }

    QString Text () const {

        return msg;

    }

  private:

      QString msg;

class readerThread:public QThread {

  public:

    readerThread (Monitor *);

    virtual void run ();

  private:

      Monitor * handle;