#include <qdatetime.h>#include <qhostaddress.h>#include <cstdlib>using namespace std;#include "weatherballoon.h"WeatherBalloon::WeatherBalloon(QWidget *parent, const char *name)    : QPushButton(tr("Quit"), parent, name),      socketDevice(QSocketDevice::Datagram){    socketDevice.setBlocking(false);    myTimerId = startTimer(5 * 1000);}void WeatherBalloon::timerEvent(QTimerEvent *event){    if (event->timerId() == myTimerId) {        QByteArray datagram;        QDataStream out(datagram, IO_WriteOnly);        out.setVersion(5);        out << QDateTime::currentDateTime() << temperature()            << humidity() << altitude();        socketDevice.writeBlock(datagram, datagram.size(),                                0x7F000001, 5824);    } else {        QPushButton::timerEvent(event);    }}double WeatherBalloon::temperature() const{    return -20.0 + (2.0 * rand() / (RAND_MAX + 1.0));}double WeatherBalloon::humidity() const{    return 20.0 + (2.0 * rand() / (RAND_MAX + 1.0));}double WeatherBalloon::altitude() const{    return 7000 + (100.0 * rand() / (RAND_MAX + 1.0));}