如何在回调中更新VTK renderWindow大小和位置？

Question

例如，我尝试在最初创建VTK renderWindow之后在回调（Python）中更改和更新它

... # Set up and initialize renderer
ren = vtk.vtkRenderer()
renWin = vtk.vtkRenderWindow()
renWin.AddRenderer(ren)

iren = vtk.vtkRenderWindowInteractor()
iren.SetRenderWindow(renWin)

ren.AddActor(actor)

iren.Initialize()
renWin.Render()
iren.Start()

... # Callback
def my_cbf(x,y):
    renWin.Finalize()
    renWin.SetPosition(x,y)
    renWin.SetSize(640,480)
    renWin.Render()

在我能想到的任何排列中都不起作用