Russian Qt Forum

void wait() const
{
    QEventLoop waiter;

    QTimer timer;

    auto wait = [&]()
    {
        waiter.quit();
    };

    QObject::connect(&timer, &QTimer::timeout, this, wait);
    timer.start(1000);
    waiter.exec();
}

class Async : public QObject
{
    Q_OBJECT

public:
    explicit Async(std::function<void()> callback, QObject* parent = nullptr)
        : QObject(parent)
        , m_callback(callback)
    {
    }

    void runAsync()
    {
        thread()->msleep(500);
        if (m_callback)
            m_callback();
    }

private:
    std::function<void()> m_callback;
};



class Waiter : public QObject
{
Q_OBJECT

public:
void wait() const
{
    QEventLoop waiter;

    auto wait = [&]()
    {
        waiter.quit();
    };

    Async async(wait);
    QtConcurrent::run(&async, &Async::runAsync);

    waiter.exec();
}

};