def __init__(self, parent, gsize, vflags=1, *args, **kw): super(AtGraphicsView, self).__init__(parent, *args, **kw) self._items = dict() self.gsize = gsize self._grid = ItemGrid(self.gsize) self._hdf = None self.vflags = vflags scene = AtGraphicsScene() scene.setBackgroundBrush(QtCore.Qt.darkGray) self.setScene(scene) self.createActions() self.createContextMenu()