There is a slot in the main class mainwindow class, which outputs data to QTextBrowser :

 void MainWindow::setLogs(QString param, QString text) { qDebug()<<text; ui->Logs->append(text); }

There is a class that runs in a separate thread, makes a POST request and should insert the data into QTextBrowser :

 QNetworkRequest request(apiUrl); request.setRawHeader("User-Agent", "Mozilla/5.0 (Windows NT 6.3; WOW64; rv:38.0) Gecko/20100101 Firefox/38.0"); request.setRawHeader("Accept", "text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8"); request.setRawHeader("Accept-Language", "ru-RU,ru;q=0.8,en-US;q=0.5,en;q=0.3"); request.setRawHeader("Accept-Encoding", "identity"); request.setRawHeader("Connection", "keep-alive"); request.setHeader(QNetworkRequest::ContentTypeHeader,"application/x-www-form-urlencoded"); reply = manager.post(request, "data="+data); connect(reply, &QNetworkReply::finished,this, &MakePost::getReplyFinished); connect(reply, &QNetworkReply::readyRead, this, &MakePost::readyReadReply); connect(reply, SIGNAL(error(QNetworkReply::NetworkError)), this, SLOT(GetError())); void MakePost::readyReadReply() { QString GetRes = QString::fromUtf8(reply->readAll()); qDebug() << "GetRes: " + GetRes; emit SendLog(GetRes); }

Call flow:

 QThread *postThread = new QThread; MakePost *sendPost = new MakePost(); sendPost->SetParam(Data, SubUrl, requestString); sendPost->moveToThread(postThread); sendPost->manager.moveToThread(postThread); connect(postThread, SIGNAL(started()), sendPost, SLOT(MakePostSignal())); postThread->start();

and a bunch of slot-stream in mainwindow:

 connect(SendPost, SIGNAL(SendLog(QString)), this, SLOT(setLogs(QString)));

Without a thread, everything works fine, but if I run in a stream, only the result is qDebug() << "GetRes: " + GetRes; and all ...

Tell me how to create a signal-slot design between the stream - the main window?

  • You have a slot declared 'void MainWindow :: setLogs (QString param, QString text)' and in the line connect (...) you wrote 'setLogs (QString)' This should not work on the same thread. The number and type of parameters must be the same in the slot declaration in the signal declaration and, respectively, when you call connect (...) - Mikhail Bubnov

1 answer 1

You have a slot declared.

  void MainWindow::setLogs(QString param, QString text)

and in the line connect (...) you wrote.

 setLogs(QString)

This should not work in the same thread. The number and type of parameters should be the same in the slot declaration in the signal declaration and, accordingly, when you call connect (...)