QPrintPreviewDialog does not show arabic caracters correctly

[Amin Benouada]

Hi there,
I am coding an application, that needs to print some papers in arabic, the problem is that QPrintPreviewDialog widget that I use does not show arabic caracters correctly.
I read html data from a QFile, with QTextStream, I set the codec to html UTF-8, set it to QTextDocument with setHtml() method, and send this document to the printer device with drawContents() method, because the print () method would not work with me.

void AjoutOffre::imprimer(QPrinter *printer)
{
    QTextDocument *file= new QTextDocument();
    QFile fichier("contrat.html");
    fichier.open(QIODevice::ReadOnly);
    QTextStream string(&fichier);
    QString html;
    string.setCodec(QTextCodec::codecForHtml("UTF-8"));
    file->setHtml(string.readAll());
    html=string.readAll();
    QMessageBox::information(this,"Titre",QString::number(html.count()));
    BonDeVisite *myWidget= new BonDeVisite();
    QPainter painter(printer);
        painter.setRenderHints(QPainter::Antialiasing |
                           QPainter::TextAntialiasing |
                           QPainter::SmoothPixmapTransform, true);

    file->drawContents(&painter);
}
void AjoutOffre::on_toolButton_clicked()

{
            QPrinter *printer= new QPrinter();
            printer->setPaperSize(QPrinter::A4);
            printer->setOutputFileName("html.pdf");
            printer->setPageMargins(12, 16, 12, 20, QPrinter::Millimeter);
            printer->setFullPage(false);
            QPrintPreviewDialog *fen= new QPrintPreviewDialog(printer,this);
            QObject::connect(fen,SIGNAL(paintRequested(QPrinter*)),this,SLOT(imprimer(QPrinter*)));
            fen->show();
}

Any ansewrs please??