Time Server Application

A server which shares a time object with connected clients.

The Time Server Application instantiates a MinuteTimer object and shares it with all connected Time Client Applications .

Defining Remote Objects using a REP-file

The REP-file "timemodel.rep" in the parent directory of the example is used to generate the header-files used by both applications. For this application, the generated "rep_timemodel_source.h" file defines MinuteTimerSource , the the class to subclass for the implementation of MinuteTimer , and other related classes.

The TimeModel Class

The TimeModel class in timemodel.h and timemodel.cpp implements the time object to share. It uses a QBasicTimer to ensure that the time is updated by calling the timerEvent member function.

void MinuteTimer::timerEvent(QTimerEvent *)
{
    QTime now = QTime::currentTime();
    if (now.second() == 59 && now.minute() == time.minute() && now.hour() == time.hour()) {
        // just missed time tick over, force it, wait extra 0.5 seconds
        time = time.addSecs(60);
        timer.start(60500, this);
    } else {
        time = now;
        timer.start(60000-time.second()*1000, this);
    }
    qDebug()<<"Time"<<time;
    setHour(time.hour());
    setMinute(time.minute());
    emit timeChanged();
}

实例化的 QRemoteObjectHost 和 QRemoteObjectRegistryHost are created to host an object and having a registry to find it. A MinuteTimer object is then created and it is shared using the enableRemoting member function of the QRemoteObjectRegistryHost 对象。

int main(int argc, char *argv[])
{
    QCoreApplication app(argc, argv);
    #if defined(Q_OS_UNIX) || defined(Q_OS_LINUX) || defined(Q_OS_QNX)
        signal(SIGINT, &unix_handler);
    #elif defined(Q_OS_WIN32)
        SetConsoleCtrlHandler((PHANDLER_ROUTINE)WinHandler, TRUE);
    #endif
    QRemoteObjectHost node(QUrl(QStringLiteral("local:replica")),QUrl(QStringLiteral("local:registry")));
    QRemoteObjectRegistryHost node2(QUrl(QStringLiteral("local:registry")));
    MinuteTimer timer;
    node2.enableRemoting(&timer);
    Q_UNUSED(timer)
    return app.exec();
}

范例工程 @ code.qt.io

另请参阅 Time Client Application .

Time Server Application

Defining Remote Objects using a REP-file

The TimeModel Class

Sharing an Instance of TimeModel

内容