How to efficiently get position of a QGraphicsItem in view coordinates?

[wayfaerer]

Oh ok. Just so I understand you correctly, QGraphicsView::mapFromScene just returns a coordinate, it doesn't actually have to "map" it first? I had a look at the source and it looks like it is being mapped, though I could be wrong:

QPoint QGraphicsView::mapFromScene(const QPointF &point) const
{
    Q_D(const QGraphicsView);
    QPointF p = d->identityMatrix ? point : d->matrix.map(point);
    p.rx() -= d->horizontalScroll();
    p.ry() -= d->verticalScroll();
    return p.toPoint();
}

QPoint QGraphicsView::mapFromScene(const QPointF &point) const
{
    Q_D(const QGraphicsView);
    QPointF p = d->identityMatrix ? point : d->matrix.map(point);
    p.rx() -= d->horizontalScroll();
    p.ry() -= d->verticalScroll();
    return p.toPoint();
}

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EDIT: I realized I misunderstood you. So it does map it, and that's the most direct way. Bummer. Well, thanks for letting me know.