qt progress bar is not working properly

Question

I have one problem.. I am making post request to php script. And I am getting back result as an xml. How can I make my qprogressbar working. I have tried this: v

oid MainWindow::init()
{
    url = "http://127.0.0.1:8888/direkt_php_qt.php";
    manager = new QNetworkAccessManager(this);
    connect(manager, SIGNAL(downloadProgress(qint64,qint64)),this,SLOT(updateDataTransferProgress(qint64,qint64)));
    connect(manager, SIGNAL(finished(QNetworkReply*)),this, SLOT(replyFinished(QNetworkReply*)));
}

void MainWindow::updateDataTransferProgress(qint64 bytesReceived, qint64 bytesTotal)
{
    ui->progressBar->setMaximum(bytesTotal + (bytesTotal * 0.25));
    ui->progressBar->setValue(bytesReceived);
    ui->progressBar->show();
}

But it's not working. I am getting error: Object::connect: No such signal QNetworkAccessManager::downloadProgress(qint64,qint64)

How can I make this work with manager variable or something like that.

EDIT 2: This is for example function that is calling init()

void MainWindow::Citanje_korisnika()
{
    init();

    QUrl params;
        params.addQueryItem("action","Citanje_korisnika");

        QByteArray data;
        data.append(params.toString());
        data.remove(0,1);

        QNetworkRequest request;
        request.setUrl(url);
        request.setHeader(QNetworkRequest::ContentTypeHeader,
        QVariant("application/x-www-form-urlencoded"));

        reply = manager->post(request, data);

}

I tried your code but I always get unexpectedly out from program. Can you change me my function from which I am calling post method so it can work with init()

Answer 1

donwloadProgress is a signal of QNetworkReply. Try something like this:

url = "http://127.0.0.1:8888/direkt_php_qt.php";
manager = new QNetworkAccessManager(this);

QNetworkReply* reply = manager->get(QNetworkRequest(url));
connect(reply, SIGNAL(downloadProgress(qint64, qint64)),this, SLOT(updateDataTransferProgress(qint64,qint64)));