# Create the RenderWindow, Renderer and both Actors
ren1 = vtk.vtkRenderer()
renWin = vtk.vtkRenderWindow()
renWin.AddRenderer(ren1)
iren = vtk.vtkRenderWindowInteractor()
iren.SetRenderWindow(renWin)
style = vtk.vtkInteractorStyleImage()
iren.SetInteractorStyle(style)
# VTK widgets consist of two parts: the widget part that handles event processing;
# and the widget representation that defines how the widget appears in the scene
# (i.e., matters pertaining to geometry).
rep = vtk.vtkBiDimensionalRepresentation2D()
widget = vtk.vtkBiDimensionalWidget()
widget.SetInteractor(iren)
widget.SetRepresentation(rep)
widget.AddObserver("EndInteractionEvent", vtkBiDimensionalCallback)
# Add the actors to the renderer, set the background and size
ren1.AddActor(imageActor)
ren1.SetBackground(0.1, 0.2, 0.4)
renWin.SetSize(300, 300)
# record events
recorder = vtk.vtkInteractorEventRecorder()
recorder.SetInteractor(iren)
recorder.SetFileName("C:/record.log")