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Constructing / destructing QApplication causes QWebView to mess up rendering of HTML

Answer 1

+1 A:

You might have run into something that has been very lightly tested, the QApplication object among others creates/holds some of the rendering context information of widgets, I don't think it was ever planned for people to take it down and put it back up again. There might be some static content that does not get reinitialised correctly when somebody tries what you are trying to do.

Harald Scheirich 2010-04-09 12:18:48

I already suspected that QApplication wasn't meant to be destructed and constructed during a single process. I was hoping there was a workaround of some kind. Thanks for your answer

Matthias Ganninger 2010-04-09 12:45:08

Answer 2

A:

You are supposed to have only 1 QApplication object, and only 1 call to exec(). Maybe you should try this.

QWebView * multiQT()
{
    QWebView *view = new QWebView;
    view->setHtml("<html><head><title>Title</title></head><body><h1>Hello World</h1></body></html>");
    view->show();

    return view;
}

main(int argc, char** argv)
{
    QApplication app(argc, NULL);

    QWebView * web0 = multiQT();

    QWebView * web1 = multiQT();

    app.exec();
}

Didier Trosset 2010-04-09 12:21:11

Thanks for your answer. Your solution works, but thats not what I need. I am using Qt inside an existing plug-in application. I really need to construct and destroy the QApplication on the fly.

Matthias Ganninger 2010-04-09 12:36:04

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Constructing / destructing QApplication causes QWebView to mess up rendering of HTML

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