Save Graphics View Scene

mandruk1331

How I can save the scene, so it would be a .jpg file or a .gif file?
QString fileName = "path";
QPixmap pixMap = QPixmap::grabWidget(ui->graphicsView_animation, 100,100,10,10);
pixMap.save(fileName);
I have tried the code above but it didn't work

? Offline

QPixmap::grabWidget is obsolete. Use QWidget::grab() instead.

mandruk1331

@Wieland I can't make an img from Graphics View which is moving rectangles, it makes a blank img, why?

? Offline

Works for me:

    QGraphicsRectItem *rect = new QGraphicsRectItem;
    rect->setRect(QRectF(0,0,100,60));
    QGraphicsScene *scene = new QGraphicsScene(this);
    ui->graphicsView->setScene(scene);
    scene->addItem(rect);

    const QPixmap pixmap = ui->graphicsView->grab();
    const QString fileName("/home/pw/image.png");
    qDebug() << pixmap.save(fileName);

mandruk1331

@Wieland I think you forgot pixmap.save(fileName,"jpg"). Thx it worked.

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bool QPixmap::save(const QString & fileName, const char * format = 0, int quality = -1) const

"If format is 0, an image format will be chosen from fileName's suffix." (see QPixmap documentation)

So you can say pixmap.save("/home/pw/myfile.jpg") and it will automatically detect the ".jpg" suffix. If you want to save the image without a suffix you must specify what file format you want to use: pixmap.save("/home/pw/myfile", "JPG") (see supported file formats).