Overridden pos() in QGraphicsItem to link to QAbstractItemModel

[lrb]

Gday,

I have subclassed QGraphicsPixmapItem in order to link the position of the item directly to a data model (subclassed from QAbstractItemModel).

I have overridden pos to return values from the model using appropriate QModelIndex objects (I am using PySide for Qt 4.8):

def pos(self):
    x = self.model.data(self.x_index)
    y = self.model.data(self.y_index)
    return QPointF(x, y)

def pos(self):
    x = self.model.data(self.x_index)
    y = self.model.data(self.y_index)
    return QPointF(x, y)

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However, pos is never called! I assumed the view (via the scene) would call pos for each item when drawing, however from the source it looks like the view/scene gets the position of a QGraphicsItem directly through 'd_ptr'.

Is what I am trying to do possible? I was hoping there was some method that would form the single point of access to pos but it looks like this is not the case.

Thanks in advance