export qtableview in PDF

[phapha]

Hi all,
I'am writing an application that takes data from a sqlite database and show it thanks to a qtableview. I would like now to add a button export which export the data displayed in this view to a PDF file.
Here is the slot I wrote:

//Exporter la liste des utilisateurs
void PageUser::genPdfUser()
{
    QString filename="users.pdf";
    //Paramètres d'impression
    QPrinter printer(QPrinter::HighResolution);
    printer.setOutputFileName(filename);
    printer.setPaperSize(QPrinter::A4);
    printer.setOutputFormat(QPrinter::PdfFormat);
 
    QPainter painter(&printer);
    painter.setRenderHints(QPainter::Antialiasing | QPainter::TextAntialiasing | QPainter::SmoothPixmapTransform);
    m_userView->render( &painter );
    painter.end();
}

//Exporter la liste des utilisateurs
void PageUser::genPdfUser()
{
    QString filename="users.pdf";
    //Paramètres d'impression
    QPrinter printer(QPrinter::HighResolution);
    printer.setOutputFileName(filename);
    printer.setPaperSize(QPrinter::A4);
    printer.setOutputFormat(QPrinter::PdfFormat);

    QPainter painter(&printer);
    painter.setRenderHints(QPainter::Antialiasing | QPainter::TextAntialiasing | QPainter::SmoothPixmapTransform);
    m_userView->render( &painter );
    painter.end();
}

To copy to clipboard, switch view to plain text mode 

It doesn't work because when I click the button, I have no reaction. Hindly help me to corect it.

thanks