title: Pyqt: How-to set item always in the center of a QGraphicsView when scrolling is possible?
body: <p>I have a QGraphicsView. To that I added a QGraphicsScene and to that a added an QPixmap(*.jpeg) and QGraphicsEllipseItem(a circle). The QPixmap is much more bigger than the QGraphicsView, so scrolling is enabled. The problem is that both QPixmap and QGraphicsEllipseItem are moving. But I want a fixed position for the QGraphicsEllipseItem in QGraphicsView. It should always be in the center of the QGraphicsView.
  How can I do that? Hope someone can help.  </p>