Printing values from QTableWidget???

[prabhudev]

Hi i am using qtablewidget in my project..it has 10 columns & 5000 rows...i want to print the whole tablewidget... When i use the below code i get a empty pdf for 5000 rows...if i use it for less rows like 50 ,it prints only the visible area of the table widget...
How to solve this issue?
Is there any way do display a widget page wise , say 100 rows per page and take printout of 100 rows and print another 100 from 2nd page?
kindly help

QPrinter printer(QPrinter::HighResolution);
    printer.setOrientation(QPrinter::Landscape);
 
    QPrintDialog dlg(&printer, this);
 
    if (dlg.exec() == QDialog::Accepted)
    {
    // calculate the total width/height table would need without scaling
    const int rows = ui->Packet_Info->model()->rowCount();
    const int cols = ui->Packet_Info->model()->columnCount();
 
    double totalWidth = 0.0;
 
    for (int c = 0; c < cols; ++c)
    {
    totalWidth += ui->Packet_Info->columnWidth(c);
    }
 
    double totalHeight = ui->Packet_Info->horizontalHeader()->height();
 
    for (int r = 0; r < rows; ++r)
    {
    totalHeight += ui->Packet_Info->rowHeight(r);
    }
 
 
    // redirect table's painting on a pixmap
    QPixmap pixmap(totalWidth, totalHeight );
 
    QPainter::setRedirected(ui->Packet_Info->horizontalHeader()->viewport(), &pixmap);
    QPainter::setRedirected(ui->Packet_Info->viewport(), &pixmap);
 
    QPaintEvent event(QRect(0, 0, totalWidth, totalHeight ));
 
    QApplication::sendEvent(ui->Packet_Info->horizontalHeader()->viewport(), &event);
    QApplication::sendEvent(ui->Packet_Info->viewport(), &event);
 
    QPainter::restoreRedirected(ui->Packet_Info->horizontalHeader()->viewport());
    QPainter::restoreRedirected(ui->Packet_Info->viewport());
 
 
 
    // print scaled pixmap
    QPainter painter(&printer);
    painter.scale(4,4);
    //painter.drawPixmap(printer.pageRect(), pixmap, pixmap.rect());
    painter.drawPixmap(printer.pageRect().topLeft(), pixmap, pixmap.rect());
 
    }

QPrinter printer(QPrinter::HighResolution);
    printer.setOrientation(QPrinter::Landscape);

    QPrintDialog dlg(&printer, this);

    if (dlg.exec() == QDialog::Accepted)
    {
    // calculate the total width/height table would need without scaling
    const int rows = ui->Packet_Info->model()->rowCount();
    const int cols = ui->Packet_Info->model()->columnCount();

    double totalWidth = 0.0;

    for (int c = 0; c < cols; ++c)
    {
    totalWidth += ui->Packet_Info->columnWidth(c);
    }

    double totalHeight = ui->Packet_Info->horizontalHeader()->height();

    for (int r = 0; r < rows; ++r)
    {
    totalHeight += ui->Packet_Info->rowHeight(r);
    }


    // redirect table's painting on a pixmap
    QPixmap pixmap(totalWidth, totalHeight );

    QPainter::setRedirected(ui->Packet_Info->horizontalHeader()->viewport(), &pixmap);
    QPainter::setRedirected(ui->Packet_Info->viewport(), &pixmap);

    QPaintEvent event(QRect(0, 0, totalWidth, totalHeight ));

    QApplication::sendEvent(ui->Packet_Info->horizontalHeader()->viewport(), &event);
    QApplication::sendEvent(ui->Packet_Info->viewport(), &event);

    QPainter::restoreRedirected(ui->Packet_Info->horizontalHeader()->viewport());
    QPainter::restoreRedirected(ui->Packet_Info->viewport());



    // print scaled pixmap
    QPainter painter(&printer);
    painter.scale(4,4);
    //painter.drawPixmap(printer.pageRect(), pixmap, pixmap.rect());
    painter.drawPixmap(printer.pageRect().topLeft(), pixmap, pixmap.rect());

    }

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[Qtonimo]

Look at this project http://qt-apps.org/content/show.php/...?content=76616.
It uses QTableView, but maybe it is useful.

[prabhudev]

Thanks...I will go through it...Is there any other option coz i am using tablewidget...

[Qtonimo]

You can do it by your own.
If you want a good layout I would recommend QTextDocument, QTextTable etc. ....

[prabhudev]

Can someone please tell how to display tablewidget in page wise...

[markjan1]

This works just fine for me. Perhaps your table does not have an item at those coordinates?

[prabhudev]

http://qt-apps.org/content/show.php/...?content=76616.
This worked fine...had to change some code in that to use my qtablewidget...
Thanks Qtonimo