Printing Screenshot -> poor quality

[MarcSchubert]

Hello,

i am trying to print a screenshot, but the print has a poor quality. is there a way to scale and print an image in high quality.

void Window::printScreenshot()
{
    imageLabel->setPixmap(QPixmap::grabWindow(QApplication::desktop()->winId()));
 
    Q_ASSERT(imageLabel->pixmap());
    QPrintDialog dialog(&printer, 0);
    if (dialog.exec()) {
        QPainter painter(&printer);
        QRect rect = painter.viewport();
        QSize size = imageLabel->pixmap()->size();
        size.scale(rect.size(), Qt::KeepAspectRatio);
        imageLabel->resize(size.width(), size.height());
        painter.setViewport(rect.x(), rect.y(), size.width(), size.height());
        painter.setWindow(imageLabel->pixmap()->rect());
        painter.drawPixmap(0, 0, *imageLabel->pixmap());
    }                         
}

void Window::printScreenshot()
{
    imageLabel->setPixmap(QPixmap::grabWindow(QApplication::desktop()->winId()));
    
    Q_ASSERT(imageLabel->pixmap());
    QPrintDialog dialog(&printer, 0);
    if (dialog.exec()) {
        QPainter painter(&printer);
        QRect rect = painter.viewport();
        QSize size = imageLabel->pixmap()->size();
        size.scale(rect.size(), Qt::KeepAspectRatio);
        imageLabel->resize(size.width(), size.height());
        painter.setViewport(rect.x(), rect.y(), size.width(), size.height());
        painter.setWindow(imageLabel->pixmap()->rect());
        painter.drawPixmap(0, 0, *imageLabel->pixmap());
    }                         
}

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Kind regards

Marc Schubert

PS: excuse my english

[Uwe]

See QPrinter::setResolution.

Uwe

[MarcSchubert]

thank you .. it works