like winrt about qcoro HOT 2 CLOSED

QCoro::Task<> DoWorkAsync(QLabel *label)
{
    // capture current thread
    auto *uiThread = QThread::currentThread();

    // prepare worker thread
    QThread workerThread;
    workerThread.start();

    // we are still on UI thread, so we can interact with the UI
    label->setText("Working...");

    // switch current thread context to the worker thread
    co_await QCoro::movetoThread(&workerThread);

    // ...
    // do your work here running on the workerThread
    // ...

    // switch thread context back to the ui thread
    co_await QCoro::moveToThread(uiThread);

    // back on the main thread, we can interact with UI agin.
    label->setText("Done");

    // stop the worker thread, we don't need it anymore
    workerThread.quit();
    workerThread.wait();
}

class WorkerThread {
public:
    explicit WorkerThread()
        : mThread(new QThread())
    {
        mThread->start();
    }

    QThread *thread() const { return mThread; }

    ~WorkerThread()
    {
        // NOTE: this needs a much more careful approach to avoid leaks, this code is just for example
        if (mThread->isRunning()) {
            connect(mThread, &QThread::finished, mThread, &QObject::deleteLater);
            mThread->quit();
        } else {
            mThread->deleteLater();
        }
    }
private:
    QThread *mThread = nullptr;
};

QCoro::Task<> DoWorkAsync(QLabel *label)
{
    auto *uiThread = QThread::currentThread();
    WorkerThread workerThread;

    label->setText("Working...");

    co_await QCoro::movetoThread(workerThread.thread());

    // do your work here running on the workerThread

    co_await QCoro::moveToThread(uiThread);

    label->setText("Done");
}