How to pass additional argument to doWork() Thread

[sigmind]

I have a simple multithreaded program to perform certain tasks in doWork() function.

MainWindow::MainWindow(QWidget *parent) :
    QMainWindow(parent),
    ui(new Ui::MainWindow)
{
    ui->setupUi(this);

    thread = new QThread();
    worker = new Worker();

    worker->moveToThread(thread);
    connect(worker, SIGNAL(valueChanged(QString)), ui->label, SLOT(setText(QString)));
    connect(worker, SIGNAL(workRequested()), thread, SLOT(start()));
    connect(thread, SIGNAL(started()), worker, SLOT(doWork()));
    connect(worker, SIGNAL(finished()), thread, SLOT(quit()), Qt::DirectConnection);


    while(1)
    {
       worker->abort();
    //    thread->wait(); 

        worker->requestWork();
    }
}

The fact is I need to pass an additional argument to doWork() function to work with it. I can't find any way to pass the parameter to doWork() function.

My doWork function should be like:

void doWork(int x, Qstring name)

[mrjj]

Hi
Just make the worker object accept them in another way.
Worker->setData(46,"sigmind");
as the started() signal from the thread, won't have any way to give DoWork any parameters anyway.
(not in a dynamic manner)

[J.Hilk]

@sigmind since you're using qt 4 syntax, why don't you define a custom signal with default arguments ?

//worker.h

signals:
    void startSignal(int defaultInt = 0, QString defaultString = "default");

//----
connect(thread, SIGNAL(started()), worker, SIGNAL(startSignal()));
connect(worker, SIGNAL(startSignal(int, QString)), worker, SLOT(doWork(int, QString)));

---

Well, I'm still in holiday mode.
Ignore that, simply give your doWork slot default arguments and you can connect it directly to the started signal.

[VRonin]

if the arguments are passed by value and known at the time of connection then you can also use
connect(thread, &QThreadstarted, worker, std::bind(&Worker::doWork,worker,2,QStringLiteral("hello")));