QWebKit, QDataStream, QList

[Viper666]

Hallo I have 2 problems:
1. I do WebBrowser and when I set Application name

QApplication a(argc, argv);
   a.setApplicationName("MyBrowser");
    Window w;

QApplication a(argc, argv);
   a.setApplicationName("MyBrowser");
    Window w;

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or

QCoreApplication::setApplicationName(QLatin1String("MyBrowser"));
    QCoreApplication::setApplicationVersion(QLatin1String("0.1"));

QCoreApplication::setApplicationName(QLatin1String("MyBrowser"));
    QCoreApplication::setApplicationVersion(QLatin1String("0.1"));

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now signal iconChanged() never emit but when i don't set Application name all work good

2. I take all history items to QList<QAction *> history;
save function:

QFile historyFile("/History.bin");
    if(!historyFile.open(QIODevice::WriteOnly))
    {
        return;
    }
    QDataStream out(&historyFile);
    out.setVersion(QDataStream::Qt_4_8);
    out << allHistoryAction;
    historyFile.flush();
    historyFile.close();

QFile historyFile("/History.bin");
    if(!historyFile.open(QIODevice::WriteOnly))
    {
        return;
    }
    QDataStream out(&historyFile);
    out.setVersion(QDataStream::Qt_4_8);
    out << allHistoryAction;
    historyFile.flush();
    historyFile.close();

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all work but in load:

QFile historyFile("/History.bin");
    if(!historyFile.open(QIODevice::ReadOnly))
    {
        return;
    }
    QDataStream in(&historyFile);
    in.setVersion(QDataStream::Qt_4_8);
    in >> allHistoryAction;
    historyFile.close();

QFile historyFile("/History.bin");
    if(!historyFile.open(QIODevice::ReadOnly))
    {
        return;
    }
    QDataStream in(&historyFile);
    in.setVersion(QDataStream::Qt_4_8);
    in >> allHistoryAction;
    historyFile.close();

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this don't work error:

error: no match for 'operator>>' in 's >> t'

[Viper666]

Please I need it. The most important is second question i can't save history

[norobro]

The answer is in the docs: link

[Viper666]

??? i don' understand I use QDatastream operator>> but i have error if i do something bad pls post me some code

[norobro]

From the linked page:

This function requires the value type to implement operator>>()

QAction does not have operator>>() or operator()<< implemented so you have to implement them.

Something like the following:

QDataStream & operator<< (QDataStream & outputStream, const QAction *act){
    outputStream << act->text() << act->shortcut(); // any properties you want to store
    return outputStream;
}
 
QDataStream & operator>> (QDataStream & inputStream,  QAction *&action){
    action = new QAction(0);
    QString text;
    QKeySequence seq;
    inputStream >> text >> seq; 
    action->setText(text);
    action->setShortcut(seq);
    return inputStream;
}

QDataStream & operator<< (QDataStream & outputStream, const QAction *act){
    outputStream << act->text() << act->shortcut(); // any properties you want to store
    return outputStream;
}

QDataStream & operator>> (QDataStream & inputStream,  QAction *&action){
    action = new QAction(0);
    QString text;
    QKeySequence seq;
    inputStream >> text >> seq; 
    action->setText(text);
    action->setShortcut(seq);
    return inputStream;
}

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[Viper666]

ok thanks but i don't know why operator << work and operator >> not

[Viper666]

and one else question i don't know how save connect or how connect all actions in list again