vtkcontext

import sys
import vtk
from PyQt4 import QtCore, QtGui
from vtk.qt4.QVTKRenderWindowInteractor import QVTKRenderWindowInteractor
 
class MainWindow(QtGui.QMainWindow):
 
    def __init__(self, parent = None):
        QtGui.QMainWindow.__init__(self, parent)
 
        self.frame = QtGui.QFrame()
 
        self.vl = QtGui.QVBoxLayout()
        self.vtkWidget = QVTKRenderWindowInteractor(self.frame)
        self.vl.addWidget(self.vtkWidget)
        
        self.iren = self.vtkWidget.GetRenderWindow().GetInteractor()

        self.frame.setLayout(self.vl)
        self.setCentralWidget(self.frame)

        self.show()
        self.iren.Initialize()

        self.view = vtk.vtkContextView()
        self.view.GetRenderer().SetBackground(1.0, 0.0, 1.0)
        self.ren = self.view.GetRenderer()
        self.vtkWidget.GetRenderWindow().AddRenderer(self.ren)

        # Create source
        source = vtk.vtkSphereSource()
        source.SetCenter(0, 0, 0)
        source.SetRadius(5.0)

        # Create a mapper
        mapper = vtk.vtkPolyDataMapper()
        mapper.SetInputConnection(source.GetOutputPort())

        # Create an actor
        actor = vtk.vtkActor()
        actor.SetMapper(mapper)

        self.ren.AddActor(actor)

        # Call to render to refresh to scenery
        self.iren.GetRenderWindow().Render()

if __name__ == "__main__":
 
    app = QtGui.QApplication(sys.argv)
 
    window = MainWindow()
 
    sys.exit(app.exec_())