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    QPrinter printer(QPrinter::HighResolution);
    printer.setOrientation(QPrinter::Landscape);
    QPrintDialog printDialog(&printer,this);
    printDialog.setWindowTitle("Print Document");
    if (printDialog.exec() == QDialog::Accepted)
    {
        QTextDocument doc;
        const QString html = "<html>"\
                "<body>"\
                "<h1>My First Heading</h1>  "\
                "<p>My first paragraph.</p> "\
                "</body>"\
                "</html>";
        doc.setHtml(html);
        doc.print(&printer);
    }