topic Re: Take screenshot of MapGraphicsView (in C++) in Qt Maps SDK Questions

Take screenshot of MapGraphicsView (in C++)

MaximilianSchönenberg — Fri, 10 Dec 2021 22:58:24 GMT

Hello,

I want to take a screenshot of the MapGraphicsView and export it to png, jpg..

I tried this, but it returns just a grey picture:

//EsriRuntimeQt::MapGraphicsView* m_MapGraphicsView;
auto pixmap = QPixmap::grabWidget(m_MapGraphicsView);
QFile file(fileUrl.toLocalFile());
file.open(QIODevice::WriteOnly);
pixmap.save(&file, "PNG");

Is there another way of taking a screenshot?

Thanks in advance!

Best regards,

Maximilian

Re: Take screenshot of MapGraphicsView (in C++)

LucasDanzinger — Mon, 28 Mar 2016 20:46:18 GMT

This doesn't directly help you right now, but I just wanted to let you know that with our Quartz release, there will be a function directly on the MapView that will export it to an image.

Re: Take screenshot of MapGraphicsView (in C++)

MaximilianSchönenberg — Tue, 29 Mar 2016 06:26:50 GMT

Ok, but Quartz isn't released yet. Is there another way of taking a screenshot of the MapView with 10.2.6?

Re: Take screenshot of MapGraphicsView (in C++)

KoushikHajra — Fri, 10 Dec 2021 22:58:27 GMT

You can try this. You might want to change the size of the rectangle. But this should work:

    QRect rect(QPoint(0, 100), QSize(400, 400)) ;
    QPixmap image = QWidget::grab(rect);
    QString path = QDir::tempPath() + QString("/testImage.png");
    bool success = image.save(path);
    qDebug() << success;

Possibly didn't work because there was no size specified maybe?

Re: Take screenshot of MapGraphicsView (in C++)

MaximilianSchönenberg — Fri, 10 Dec 2021 22:58:29 GMT

Thank you for your answer Koushik, but it's the same result as before (see attachment).

This is what finally works for me (thanks to Norbert Thoden):

//QVBoxLayout* m_VBox
QRect rect(m_VBox->itemAt(1)->geometry());
QMutex m(QMutex::NonRecursive);
m.lock();
m.tryLock(100);
auto pixmap = QGuiApplication::primaryScreen()->grabWindow(winId(),rect.x(), rect.y(), rect.width(), rect.height());
QFile file(fileUrl.toLocalFile());
file.open(QIODevice::WriteOnly);
pixmap.save(&file, "PNG");

Best regards,

Maximilian Schönenberg