QGraphicsItem::scenePos() not returning scene coordinates of item

[Corran]

OK, this only relates to Qt 4.2.

Take this sample code:

QGraphicsScene* scene = new QGraphicsScene(this);
 
scene->addEllipse(QRectF(110, 110, 20, 20)); // a circle with centre 120,120 and diameter 20
 
QGraphicsItem* item = sceneScene->itemAt(120, 120);
cout << item->scenePos().x() << ", " << item->scenePos().y() << endl;

QGraphicsScene* scene = new QGraphicsScene(this);

scene->addEllipse(QRectF(110, 110, 20, 20)); // a circle with centre 120,120 and diameter 20

QGraphicsItem* item = sceneScene->itemAt(120, 120);
cout << item->scenePos().x() << ", " << item->scenePos().y() << endl;

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Now I would expect this to return the scene position of the object it found at, i.e. "120, 120" since QGraphicsItem::scenePos() just returns QGraphicsItem::mapToScene(0,0).

However it only ever returns "0, 0".

In fact

cout << item->mapToScene(item->pos()).x() << ", " << item->mapToScene(item->pos()).x() << endl;
cout << item->pos().x() << ", " << item->pos().y() << endl;

cout << item->mapToScene(item->pos()).x() << ", " << item->mapToScene(item->pos()).x() << endl;
cout << item->pos().x() << ", " << item->pos().y() << endl;

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also all return "0, 0" whereas you would expect at least one of them to return something else.

Is this a feature or a bug? Does anyone else have this problem or know why I am getting this result?

[jpn]

With which exact version of Qt 4.2 did you notice this? I tested with 4.2.0-rc1 and I noticed the same behaviour. I couldn't find anything related in the Task Tracker nor TT's mailing lists, though. Maybe try a recent snapshot of Qt 4.2 and inform the trolls if the problem still persists..?