Get a QGraphicsPixmapItem from a Scene and modify(change the image).

[stampede]

Use qgraphicsitem_cast on pointer returned by itemAt method.

QGraphicsPixmapItem * pixmap = qgraphicsitem_cast<QGraphicsPixmapItem*>(scene->itemAt(pos));
if (pixmap){
    ....
}

QGraphicsPixmapItem * pixmap = qgraphicsitem_cast<QGraphicsPixmapItem*>(scene->itemAt(pos));
if (pixmap){
    ....
}

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