ExceptionAwareQApplication_notify.cpp

bool ExceptionAwareQApplication::notify(QObject *receiver, QEvent *event)
{
    try
    {
        return QApplication::notify(receiver, event);
    }
    catch (std::exception &ex)
    {
        // Type QMetaCallEvent requires private header <private/qobject_p.h>
        QMetaCallEvent *metaCallEvent = dynamic_cast<QMetaCallEvent *>(event);
        if (metaCallEvent)
        {
            QString receiverClassName = receiver->metaObject()->className();

            QString signalSignature;
            const auto sender = metaCallEvent->sender();
            const auto senderMeta = sender->metaObject();

            for (auto i = senderMeta->methodOffset(); i < senderMeta->methodCount(); ++i)
            {
                const auto method = senderMeta->method(i);
                if (QMetaObjectPrivate::signalIndex(method) == metaCallEvent->signalId())
                {
                    signalSignature = QString::fromUtf8(method.methodSignature());
                }
            }

            QString senderClassName = senderMeta->className();

            qDebug() << "Caught std::exception during Qt slot invocation in class "
                     << receiverClassName
                     << " after emitting signal " << signalSignature
                     << " from sender " << senderClassName;
        }

        // log exception content

        return false;
    }
}