def METHOD_NAME(self, vg, nodes):
    # setup default meta colors
    color = vg.getMeta('bgcolor', '#000000')
    self.scene().setBackgroundBrush( QtGui.QBrush( QtGui.QColor( color ) ) )
    self._v_nodecol._removeLeft()
    self._v_nodecol._removeRight()
    self._v_nodecol.removeColumn()
    self._v_nodecol = NodeColumn(vg, nodes, self.scene() )
    self._v_vg = vg