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Scaling in QGraphicsItemAnimation
timeline = new QTimeLine(time);
    timeline->setFrameRange(0, 100);
    animation = new QGraphicsItemAnimation;

    QRectF rect = item->boundingRect();
    int h = rect.bottom() - rect.top();
    int w = rect.right() - rect.left();


    animation->setItem(item);
    animation->setTimeLine(timeline);


    for (int i = 0; i < 100; i++) {
            int x = w + (int)((float)w*(float)(i/100.0));
            qreal xx = (qreal)(x)/(qreal)w;
            int y = (h) + (int)((float)h*(float)(i/100.0));
            qreal yy = (qreal)(y)/(qreal)h;
            animation->setScaleAt(i/100, xx, yy);
    }

const QSizeF size = item->boundingRect().size()*0.5;
item->setOffset(size.width(), size.height());
item->moveBy(size.width(), size.height());