How can I print a QWebPage to a QPdfWriter?

[ricokahler]

Problem: I can't create multi-paged PDF documents from QWebFrame with QPdfWriter because there is no ::print() method that takes a QPagedDevice or QPdfWriter (or at least I think that's the reason)

(context: this is for: https://github.com/ariya/phantomjs/issues/14268)

This method is from the webpage module from PhantomJS.

bool WebPage::renderPdf(QPdfWriter& pdfWriter)
{
    // code removed for brevity

    QPainter painter(&pdfWriter);
    //m_mainFrame->render(&painter);
    QRect pageRect = pdfWriter.pageLayout().pageSize().rectPoints();
    // ===============================
    // How do I include QtPrintContext
    // ===============================
    QtPrintContext printContext(&painter, pageRect, m_mainFrame->d);

    for (int page = 0; page < printContext.pageCount(); page++) {
        printContext.spoolPage(page, pageRect.width());
        pdfWriter.newPage();
    }
    painter.end();

    return true;
}

Question: How can I #include QtPrintContext in the module above? Will this even fix the problem?

Thanks!