How do I use QPixmap::grabWindow with offscreen (QScrollArea) regions ?

[rsilva]

I've tried it yesterday when I found it, but, it don't capture the Flash content in the WebView.

void Standalone::screenShot_VirtualScreen()
{
    QImage img(ui->webView->page()->mainFrame()->contentsSize(), QImage::Format_ARGB32_Premultiplied);
    img.fill(Qt::transparent);
 
    QPainter painter(&img);
    painter.setRenderHint(QPainter::Antialiasing, true);
    painter.setRenderHint(QPainter::TextAntialiasing, true);
    painter.setRenderHint(QPainter::SmoothPixmapTransform, true);
    ui->webView->render(&painter);
    painter.end();
 
    img.save(screenShotPath(), "PNG");
}

void Standalone::screenShot_VirtualScreen()
{
    QImage img(ui->webView->page()->mainFrame()->contentsSize(), QImage::Format_ARGB32_Premultiplied);
    img.fill(Qt::transparent);

    QPainter painter(&img);
    painter.setRenderHint(QPainter::Antialiasing, true);
    painter.setRenderHint(QPainter::TextAntialiasing, true);
    painter.setRenderHint(QPainter::SmoothPixmapTransform, true);
    ui->webView->render(&painter);
    painter.end();

    img.save(screenShotPath(), "PNG");
}

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It's only give me a "empty" (background-color) image, and not the content.