Need startSystem Move and startSystemResize method, upgrade Qt from 5.13.2 to 5.15.2. However, QWebEnginePage::runJavaScript cannot run in QThread after the upgrade. It runs fine on 5.13.2

cisordeng

Just like the title, I upgraded Qt from 5.13.2 to 5.15.2 because I wanted to use 5.15 startSystemMove and startSystemResize, but I couldn't run QWebEnginePage::runJavaScript on QThread after the upgrade. It worked well in 5.13.2. This is a small example to reproduce my problem. Any suggestions or help would be greatly appreciated. Or the suggestion to move startSystemMove and startSystemResize from Qt5.15.2 to Qt5.13.2

#include <QThread>
#include <QApplication>
#include <QMainWindow>
#include <QWebEngineView>
#include <QUrl>
#include <QDebug>

int main(int argc, char *argv[])
{
    QApplication app(argc, argv);
    QMainWindow window;
    auto *browser = new QWebEngineView();
    browser->load(QUrl("https://forum.qt.io/"));
    window.setCentralWidget(browser);
    auto *downloadThread = QThread::create([&]() {
        qDebug()<<"start thread";
        browser->page()->runJavaScript("console.error('download in thread');");
        qDebug()<<"end thread";
    });
    downloadThread->start();
    window.show();
    return QApplication::exec();
}

In Qt5.15.2 output：

start thread
13:49:47: The program has unexpectedly finished.
13:49:47: The process was ended forcefully.

In Qt5.13.2 output：

start thread
end thread
js: download in thread

Any suggestions or help would be greatly appreciated.

cisordeng

Or build Qt5.15.2 + QtWebEngine5.13.2 implementation?

cisordeng

Temporarily use QWebEngineDownloadItem to achieve download