Python vtk.vtkGenericRenderWindowInteractor函数代码示例

    def createRenderWindow( self, **args ):
        blocking = args.get( 'blocking', False )
        renWin = args.get( 'renwin', None ) 
        if renWin == None:
            renWin = vtk.vtkRenderWindow()
            
        rendWinInteractor = renWin.GetInteractor()
        if rendWinInteractor == None:                
            rendWinInteractor = vtk.vtkRenderWindowInteractor() if blocking else vtk.vtkGenericRenderWindowInteractor()
            renWin.SetInteractor( rendWinInteractor )
            rendWinInteractor.SetRenderWindow(renWin)  
        
        self.renderWindowInteractor =  rendWinInteractor              
        self.renderer = vtk.vtkRenderer()
        renWin.AddRenderer( self.renderer )

        self.interactorStyle = vtk.vtkInteractorStyleTrackballCamera( )
        self.renderWindowInteractor.SetInteractorStyle( self.interactorStyle )
        self.interactorStyle.KeyPressActivationOff( )
        self.interactorStyle.SetEnabled(1)
                     
        if self.useDepthPeeling:
            self.renderer.UseDepthPeelingOn( )
            self.renderer.SetOcclusionRatio( 0.2 )       
            renWin.SetAlphaBitPlanes( 1 )
            renWin.SetMultiSamples( 0 )
            
        self.renderer.SetBackground(1.0, 1.0, 1.0)
        self.renderer.SetNearClippingPlaneTolerance( 0.0001 )    
        self.renderWindow = renWin

    def __init__(self, *args):
        print "GtkGLExtVTKRenderWindowInteractor.__init__()"
        gtk.gtkgl.DrawingArea.__init__(self)

        self.set_double_buffered(False)
        #the below line used in view3 from eegview -eli
        self.overlayRenderer = None
        
        self._RenderWindow = vtk.vtkRenderWindow()

        # private attributes
        self.__Created = 0
        self._ActiveButton = 0

        self._Iren = vtk.vtkGenericRenderWindowInteractor()
        self._Iren.SetRenderWindow(self._RenderWindow)

        # mcc XXX: hmm
        self._Iren.GetInteractorStyle().SetCurrentStyleToTrackballCamera()
        self._Iren.AddObserver('CreateTimerEvent', self.CreateTimer)
        self._Iren.AddObserver('DestroyTimerEvent', self.DestroyTimer)
        self.ConnectSignals()
        
        # need this to be able to handle key_press events.
        self.set_flags(gtk.CAN_FOCUS)

    def __init__(self, parent=None, name=None, *args, **kw):
        # the current button
        self._ActiveButton = 0

        # private attributes
        self.__oldFocus = None
        self.__saveX = 0
        self.__saveY = 0
        self.__saveState = 0
        self.__connected = 0  # is QT->VTK connection done?

        # do special handling of some keywords:
        # stereo, rw

        stereo = 0

        if kw.has_key('stereo'):
            if kw['stereo']:
                stereo = 1
            del kw['stereo']

        rw = None

        if kw.has_key('rw'):
            rw = kw['rw']
            del kw['rw']

        # create qt-level widget
        # You cannot pass kw anymore, you'll a TypeError: keyword arguments are not supported
        # http://goldenspud.com/webrog/archives/2004/07/20/pyqt-platform-inconsistencies/
        apply(qt.QWidget.__init__, (self,parent,name) + args)

        if rw: # user-supplied render window
            self._RenderWindow = rw
        else:
            self._RenderWindow = vtk.vtkRenderWindow()

        if stereo: # stereo mode
            self._RenderWindow.StereoCapableWindowOn()
            self._RenderWindow.SetStereoTypeToCrystalEyes()

        self._Iren = vtk.vtkGenericRenderWindowInteractor()
        self._Iren.SetRenderWindow(self._RenderWindow)

        # do all the necessary qt setup
        self.setBackgroundMode(qt.Qt.NoBackground)
        self.setMouseTracking(1) # get all mouse events
        self.setFocusPolicy(qt.QWidget.ClickFocus)
        if parent == None:
            self.show()

        self._Timer = qt.QTimer(self, 'timer handler')
        self.connect(self._Timer, qt.SIGNAL('timeout()'),
                     self.TimerEvent)

        self._Iren.AddObserver('CreateTimerEvent', self.CreateTimer)
        self._Iren.AddObserver('DestroyTimerEvent', self.DestroyTimer)

    def __init__(self, master, cnf={}, **kw):
        """
        Constructor.

        Keyword arguments:

          rw -- Use passed render window instead of creating a new one.

          stereo -- If True, generate a stereo-capable window.
          Defaults to False.

          focus_on_enter -- If True, use a focus-follows-mouse mode.
          Defaults to False where the widget will use a click-to-focus
          mode.
        """
        # load the necessary extensions into tk
        vtkLoadPythonTkWidgets(master.tk)

        try: # check to see if a render window was specified
            renderWindow = kw['rw']
        except KeyError:
            renderWindow = vtk.vtkRenderWindow()

        try:  # was a stereo rendering context requested?
            if kw['stereo']:
	       renderWindow.StereoCapableWindowOn()
               del kw['stereo']
	except KeyError:
            pass
 
        # check if focus should follow mouse
        if kw.get('focus_on_enter'):
            self._FocusOnEnter = 1
            del kw['focus_on_enter']
        else:
            self._FocusOnEnter = 0
 
        kw['rw'] = renderWindow.GetAddressAsString("vtkRenderWindow")
        Tkinter.Widget.__init__(self, master, 'vtkTkRenderWidget', cnf, kw)

        self._Iren = vtk.vtkGenericRenderWindowInteractor()
        self._Iren.SetRenderWindow(self._RenderWindow)

        self._Iren.AddObserver('CreateTimerEvent', self.CreateTimer)
        self._Iren.AddObserver('DestroyTimerEvent', self.DestroyTimer)

        self._OldFocus = None

        # private attributes
        self.__InExpose = 0

        # create the Tk bindings
        self.BindEvents()

    def __init__(self, *args):
        gtk.gtkgl.DrawingArea.__init__(self)

        self.set_double_buffered(gtk.FALSE)
        
        self._RenderWindow = vtk.vtkRenderWindow()

        # private attributes
        self.__Created = 0
        self._ActiveButton = 0

        self._Iren = vtk.vtkGenericRenderWindowInteractor()
        self._Iren.SetRenderWindow(self._RenderWindow)
        self._Iren.GetInteractorStyle().SetCurrentStyleToTrackballCamera()
        self._Iren.AddObserver('CreateTimerEvent', self.CreateTimer)
        self._Iren.AddObserver('DestroyTimerEvent', self.DestroyTimer)
        self.ConnectSignals()
        
        # need this to be able to handle key_press events.
        self.set_flags(gtk.CAN_FOCUS)

    def initialize(self):
        global renderer, renderWindow, renderWindowInteractor, cone, mapper, actor

        # Bring used components
        self.registerVtkWebProtocol(protocols.vtkWebMouseHandler())
        self.registerVtkWebProtocol(protocols.vtkWebViewPort())
        self.registerVtkWebProtocol(protocols.vtkWebViewPortImageDelivery())
        self.registerVtkWebProtocol(protocols.vtkWebViewPortGeometryDelivery())

        # Update authentication key to use
        self.updateSecret(_WebCone.authKey)

        # Create default pipeline (Only once for all the session)
        if not _WebCone.view:
            # VTK specific code
            renderer = vtk.vtkRenderer()
            renderWindow = vtk.vtkRenderWindow()
            renderWindow.AddRenderer(renderer)

            renderWindow.OffScreenRenderingOn()
            renderWindowInteractor = vtk.vtkGenericRenderWindowInteractor()
            renderWindowInteractor.SetRenderWindow(renderWindow)
            renderWindowInteractor.GetInteractorStyle().SetCurrentStyleToTrackballCamera()

            cone = vtk.vtkConeSource()
            mapper = vtk.vtkPolyDataMapper()
            actor = vtk.vtkActor()


            mapper.SetInputConnection(cone.GetOutputPort())
            actor.SetMapper(mapper)

            renderer.AddActor(actor)
            renderer.ResetCamera()
            renderWindow.Render()

            # VTK Web application specific
            _WebCone.view = renderWindow
            self.getApplication().GetObjectIdMap().SetActiveObject("VIEW", renderWindow)

    def __init__(self, *args):
        l = list(args)
        attr = (gtkgl.RGBA, gtkgl.DOUBLEBUFFER)
        l.insert(0, self)
        l.insert(1, attr)
        apply(gtkgl.GtkGLArea.__init__, l)
        self._RenderWindow = vtk.vtkRenderWindow()

        # private attributes
        self.__Created = 0
        self._ActiveButton = 0

        self._Iren = vtk.vtkGenericRenderWindowInteractor()
        self._Iren.SetRenderWindow(self._RenderWindow)

        self._Iren.AddObserver('CreateTimerEvent', self.CreateTimer)
        self._Iren.AddObserver('DestroyTimerEvent', self.DestroyTimer)
        self.ConnectSignals()
        
        # need this to be able to handle key_press events.
        self.set_flags(gtk.CAN_FOCUS)
        # default size
        self.set_usize(300, 300)

    def __init__(self, parent=None, wflags=Qt.WindowFlags(), **kw):
        # the current button
        self._ActiveButton = Qt.NoButton

        # private attributes
        self.__oldFocus = None
        self.__saveX = 0
        self.__saveY = 0
        self.__saveModifiers = Qt.NoModifier
        self.__saveButtons = Qt.NoButton

        # do special handling of some keywords:
        # stereo, rw

        try:
            stereo = bool(kw['stereo'])
        except KeyError:
            stereo = False

        try:
            rw = kw['rw']
        except KeyError:
            rw = None

        # create qt-level widget
        QWidget.__init__(self, parent, wflags|Qt.MSWindowsOwnDC)

        if rw: # user-supplied render window
            self._RenderWindow = rw
        else:
            self._RenderWindow = vtk.vtkRenderWindow()

        wid = self._get_win_id()
        self._RenderWindow.SetWindowInfo(wid)

        self._should_set_parent_info = (sys.platform == 'win32')

        if stereo: # stereo mode
            self._RenderWindow.StereoCapableWindowOn()
            self._RenderWindow.SetStereoTypeToCrystalEyes()

        try:
            self._Iren = kw['iren']
        except KeyError:
            self._Iren = vtk.vtkGenericRenderWindowInteractor()

        self._Iren.SetRenderWindow(self._RenderWindow)

        # do all the necessary qt setup
        self.setAttribute(Qt.WA_OpaquePaintEvent)
        self.setAttribute(Qt.WA_PaintOnScreen)
        self.setMouseTracking(True) # get all mouse events
        self.setFocusPolicy(Qt.WheelFocus)
        self.setSizePolicy(QSizePolicy(QSizePolicy.Expanding, QSizePolicy.Expanding))

        self._Timer = QTimer(self)
        self._Timer.timeout.connect(self.TimerEvent)

        # add wheel timer to fix scrolling issue with trackpad
        self.wheel_timer = QTimer()
        self.wheel_timer.setSingleShot(True)
        self.wheel_timer.setInterval(25)
        self.wheel_timer.timeout.connect(self._emit_wheel_event)
        self.wheel_accumulator = 0
        self._saved_wheel_event_info = ()

        self._Iren.AddObserver('CreateTimerEvent', messenger.send)
        messenger.connect(self._Iren, 'CreateTimerEvent', self.CreateTimer)
        self._Iren.AddObserver('DestroyTimerEvent', messenger.send)
        messenger.connect(self._Iren, 'DestroyTimerEvent', self.DestroyTimer)
        self._RenderWindow.AddObserver('CursorChangedEvent', messenger.send)
        messenger.connect(self._RenderWindow, 'CursorChangedEvent',
                          self.CursorChangedEvent)

        # Create a hidden child widget and connect its destroyed signal to its
        # parent ``Finalize`` slot. The hidden children will be destroyed
        # before its parent thus allowing cleanup of VTK elements.
        self._hidden = QWidget(self)
        self._hidden.hide()
        self._hidden.destroyed.connect(self.Finalize)

    def __init__(self, parent=None, wflags=Qt.WindowFlags(), **kw):
        # the current button
        self._ActiveButton = Qt.NoButton

        # private attributes
        self.__saveX = 0
        self.__saveY = 0
        self.__saveModifiers = Qt.NoModifier
        self.__saveButtons = Qt.NoButton

        # do special handling of some keywords:
        # stereo, rw

        stereo = 0

        if 'stereo' in kw:
            if kw['stereo']:
                stereo = 1

        rw = None

        if 'rw' in kw:
            rw = kw['rw']

        # create qt-level widget
        QWidget.__init__(self, parent, wflags | Qt.MSWindowsOwnDC)

        # check if retina display, or use 'retina' argument
        try:
            self.ratio = self.devicePixelRatio()
        except:
            self.ratio = 1
        if 'retina' in kw:
            if kw['retina']:
                self.ratio = 2
        if parent is None:
            self.ratio = 1

        # to avoid strange boundary artefacts
        # if self.ratio > 1:
        #    self.ratio *= 1.01
        # unfortunately this causes problems with PNG writing

        if rw:  # user-supplied render window
            self._RenderWindow = rw
        else:
            self._RenderWindow = vtk.vtkRenderWindow()

        WId = self.winId()

        if type(WId).__name__ == 'PyCObject':
            from ctypes import pythonapi, c_void_p, py_object

            pythonapi.PyCObject_AsVoidPtr.restype = c_void_p
            pythonapi.PyCObject_AsVoidPtr.argtypes = [py_object]

            WId = pythonapi.PyCObject_AsVoidPtr(WId)

        self._RenderWindow.SetWindowInfo(str(int(WId)))

        if stereo:  # stereo mode
            self._RenderWindow.StereoCapableWindowOn()
            self._RenderWindow.SetStereoTypeToCrystalEyes()

        if 'iren' in kw:
            self._Iren = kw['iren']
        else:
            self._Iren = vtk.vtkGenericRenderWindowInteractor()
            self._Iren.SetRenderWindow(self._RenderWindow)

        # do all the necessary qt setup
        self.setAttribute(Qt.WA_OpaquePaintEvent)
        self.setAttribute(Qt.WA_PaintOnScreen)
        self.setMouseTracking(True)  # get all mouse events
        self.setFocusPolicy(Qt.WheelFocus)
        self.setSizePolicy(QSizePolicy(QSizePolicy.Expanding,
                                       QSizePolicy.Expanding))

        self._Timer = QTimer(self)
        self._Timer.timeout.connect(self.TimerEvent)

        self._Iren.AddObserver('CreateTimerEvent', self.CreateTimer)
        self._Iren.AddObserver('DestroyTimerEvent', self.DestroyTimer)
        self._Iren.GetRenderWindow().AddObserver('CursorChangedEvent',
                                                 self.CursorChangedEvent)

        # Create a hidden child widget and connect its destroyed signal to its
        # parent ``Finalize`` slot. The hidden children will be destroyed before
        # its parent thus allowing cleanup of VTK elements.
        self._hidden = QWidget(self)
        self._hidden.hide()
        self._hidden.destroyed.connect(self.Finalize)

    def __init__(self, parent=None, wflags=QtCore.Qt.WindowFlags(), **kw):
        # the current button
        self._ActiveButton = QtCore.Qt.NoButton

        # private attributes
        self.__oldFocus = None
        self.__saveX = 0
        self.__saveY = 0
        self.__saveModifiers = QtCore.Qt.NoModifier
        self.__saveButtons = QtCore.Qt.NoButton

        # do special handling of some keywords:
        # stereo, rw

        stereo = 0

        if kw.has_key('stereo'):
            if kw['stereo']:
                stereo = 1

        rw = None

        if kw.has_key('rw'):
            rw = kw['rw']

        # create qt-level widget
        QtGui.QWidget.__init__(self, parent, wflags|QtCore.Qt.MSWindowsOwnDC)

        if rw: # user-supplied render window
            self._RenderWindow = rw
        else:
            self._RenderWindow = vtk.vtkRenderWindow()

        self._RenderWindow.SetWindowInfo(str(int(self.winId())))

        if stereo: # stereo mode
            self._RenderWindow.StereoCapableWindowOn()
            self._RenderWindow.SetStereoTypeToCrystalEyes()

        if kw.has_key('iren'):
            self._Iren = kw['iren']
        else:
            self._Iren = vtk.vtkGenericRenderWindowInteractor()
            self._Iren.SetRenderWindow(self._RenderWindow)

        # do all the necessary qt setup
        self.setAttribute(QtCore.Qt.WA_OpaquePaintEvent)
        self.setAttribute(QtCore.Qt.WA_PaintOnScreen)
        self.setMouseTracking(True) # get all mouse events
        self.setFocusPolicy(QtCore.Qt.WheelFocus)
        self.setSizePolicy(QtGui.QSizePolicy(QtGui.QSizePolicy.Expanding, QtGui.QSizePolicy.Expanding))

        self._Timer = QtCore.QTimer(self)
        self.connect(self._Timer, QtCore.SIGNAL('timeout()'), self.TimerEvent)

        self._Iren.AddObserver('CreateTimerEvent', self.CreateTimer)
        self._Iren.AddObserver('DestroyTimerEvent', self.DestroyTimer)
        self._Iren.GetRenderWindow().AddObserver('CursorChangedEvent',
                                                 self.CursorChangedEvent)

        #Create a hidden child widget and connect its destroyed signal to its
        #parent ``Finalize`` slot. The hidden children will be destroyed before
        #its parent thus allowing cleanup of VTK elements.
        self._hidden = QtGui.QWidget(self)
        self._hidden.hide()
        self.connect(self._hidden, QtCore.SIGNAL('destroyed()'), self.Finalize)

    def __init__(self, parent=None, wflags=Qt.WindowFlags()):
        # the current button
        self._ActiveButton = Qt.NoButton

        # private attributes
        self.__saveX = 0
        self.__saveY = 0
        self.__saveModifiers = Qt.NoModifier
        self.__saveButtons = Qt.NoButton

        # create qt-level widget
        glFormat = QtOpenGL.QGLFormat()
        glFormat.setAlpha(True)
        QtOpenGL.QGLWidget.__init__(self,glFormat,parent,None)

        # Create a wender window
        self._RenderWindow = vtk.vtkRenderWindow()
        self._RenderWindow.SetAlphaBitPlanes(1)
        self._RenderWindow.SetMultiSamples(0)

        # Create a renderer
        self._Renderer = vtk.vtkRenderer()
        self._Renderer.SetUseDepthPeeling(1)
        #self._Renderer.SetMaximumNumberOfPeels(100)
        #self._Renderer.SetOcclusionRatio(0.0)
        self._RenderWindow.AddRenderer(self._Renderer)

        WId = self.winId()

        # Python2
        if type(WId).__name__ == 'PyCObject':
            from ctypes import pythonapi, c_void_p, py_object

            pythonapi.PyCObject_AsVoidPtr.restype  = c_void_p
            pythonapi.PyCObject_AsVoidPtr.argtypes = [py_object]

            WId = pythonapi.PyCObject_AsVoidPtr(WId)

        # Python3
        elif type(WId).__name__ == 'PyCapsule':
            from ctypes import pythonapi, c_void_p, py_object, c_char_p

            pythonapi.PyCapsule_GetName.restype = c_char_p
            pythonapi.PyCapsule_GetName.argtypes = [py_object]

            name = pythonapi.PyCapsule_GetName(WId)

            pythonapi.PyCapsule_GetPointer.restype  = c_void_p
            pythonapi.PyCapsule_GetPointer.argtypes = [py_object, c_char_p]

            WId = pythonapi.PyCapsule_GetPointer(WId, name)

        self._RenderWindow.SetWindowInfo(str(int(WId)))

        self._Iren = vtk.vtkGenericRenderWindowInteractor()
        self._Iren.SetRenderWindow(self._RenderWindow)

        # do all the necessary qt setup
        self.setAttribute(Qt.WA_OpaquePaintEvent)
        self.setAttribute(Qt.WA_PaintOnScreen)
        self.setMouseTracking(True) # get all mouse events
        self.setFocusPolicy(Qt.WheelFocus)
        self.setSizePolicy(QSizePolicy(QSizePolicy.Expanding, QSizePolicy.Expanding))

        self._Timer = QTimer(self)
        self._Timer.timeout.connect(self.TimerEvent)

        self._Iren.AddObserver('CreateTimerEvent', self.CreateTimer)
        self._Iren.AddObserver('DestroyTimerEvent', self.DestroyTimer)
        self._Iren.GetRenderWindow().AddObserver('CursorChangedEvent',
                                                 self.CursorChangedEvent)

        #Create a hidden child widget and connect its destroyed signal to its
        #parent ``Finalize`` slot. The hidden children will be destroyed before
        #its parent thus allowing cleanup of VTK elements.
        self._hidden = QWidget(self)
        self._hidden.hide()
        self._hidden.destroyed.connect(self.Finalize)

    def __init__(self, parent=None, **kw):
        # the current button
        self._ActiveButton = Qt.NoButton

        # private attributes
        self.__saveX = 0
        self.__saveY = 0
        self.__saveModifiers = Qt.NoModifier
        self.__saveButtons = Qt.NoButton
        self.__wheelDelta = 0

        # do special handling of some keywords:
        # stereo, rw

        try:
            stereo = bool(kw['stereo'])
        except KeyError:
            stereo = False

        try:
            rw = kw['rw']
        except KeyError:
            rw = None

        # create base qt-level widget
        if QVTKRWIBase == "QWidget":
            if "wflags" in kw:
                wflags = kw['wflags']
            else:
                wflags = Qt.WindowFlags()
            QWidget.__init__(self, parent, wflags | Qt.MSWindowsOwnDC)
        elif QVTKRWIBase == "QGLWidget":
            QGLWidget.__init__(self, parent)

        if rw: # user-supplied render window
            self._RenderWindow = rw
        else:
            self._RenderWindow = vtk.vtkRenderWindow()

        WId = self.winId()

        # Python2
        if type(WId).__name__ == 'PyCObject':
            from ctypes import pythonapi, c_void_p, py_object

            pythonapi.PyCObject_AsVoidPtr.restype  = c_void_p
            pythonapi.PyCObject_AsVoidPtr.argtypes = [py_object]

            WId = pythonapi.PyCObject_AsVoidPtr(WId)

        # Python3
        elif type(WId).__name__ == 'PyCapsule':
            from ctypes import pythonapi, c_void_p, py_object, c_char_p

            pythonapi.PyCapsule_GetName.restype = c_char_p
            pythonapi.PyCapsule_GetName.argtypes = [py_object]

            name = pythonapi.PyCapsule_GetName(WId)

            pythonapi.PyCapsule_GetPointer.restype  = c_void_p
            pythonapi.PyCapsule_GetPointer.argtypes = [py_object, c_char_p]

            WId = pythonapi.PyCapsule_GetPointer(WId, name)

        self._RenderWindow.SetWindowInfo(str(int(WId)))
        #
        # if stereo: # stereo mode
        #     self._RenderWindow.StereoCapableWindowOn()
        #     self._RenderWindow.SetStereoTypeToCrystalEyes()

        try:
            self._Iren = kw['iren']
        except KeyError:
            self._Iren = vtk.vtkGenericRenderWindowInteractor()
            self._Iren.SetRenderWindow(self._RenderWindow)

            # this is needed to get nice'n'smooth mouse interaction
            self.interactorStyle = vtk.vtkInteractorStyleSwitch()
            # self.interactorStyle.SetCurrentStyleToTrackballActor()
            self.interactorStyle.SetCurrentStyleToTrackballCamera()
            self._Iren.SetInteractorStyle(self.interactorStyle)

        # do all the necessary qt setup
        self.setAttribute(Qt.WA_OpaquePaintEvent)
        self.setAttribute(Qt.WA_PaintOnScreen)
        self.setMouseTracking(True) # get all mouse events
        self.setFocusPolicy(Qt.WheelFocus)
        self.setSizePolicy(QSizePolicy(QSizePolicy.Expanding, QSizePolicy.Expanding))

        self._Timer = QTimer(self)
        self._Timer.timeout.connect(self.TimerEvent)

        self._Iren.AddObserver('CreateTimerEvent', self.CreateTimer)
        self._Iren.AddObserver('DestroyTimerEvent', self.DestroyTimer)
        self._Iren.GetRenderWindow().AddObserver('CursorChangedEvent',
                                                 self.CursorChangedEvent)

        #Create a hidden child widget and connect its destroyed signal to its
        #parent ``Finalize`` slot. The hidden children will be destroyed before
        #its parent thus allowing cleanup of VTK elements.
#.........这里部分代码省略.........

 def createRenderWindow( self, blocking = False ):
     self.renderer = vtk.vtkRenderer()
     renWin = vtk.vtkRenderWindow()
    
     if self.useDepthPeeling:
         self.renderer.UseDepthPeelingOn( )
         self.renderer.SetOcclusionRatio( 0.2 )       
         renWin.SetAlphaBitPlanes( 1 )
         renWin.SetMultiSamples( 0 )
     
     renWin.AddRenderer( self.renderer )
     self.renderWindowInteractor = vtk.vtkRenderWindowInteractor() if blocking else vtk.vtkGenericRenderWindowInteractor()
     self.renderWindowInteractor.SetRenderWindow(renWin)            
     return renWin

    def __init__(self, parent=None, wflags=QtCore.Qt.WindowFlags(), **kw):
        # the current button
        self._ActiveButton = QtCore.Qt.NoButton

        # private attributes
        self.__oldFocus = None
        self.__saveX = 0
        self.__saveY = 0
        self.__saveModifiers = QtCore.Qt.NoModifier
        self.__saveButtons = QtCore.Qt.NoButton

        # do special handling of some keywords:
        # stereo, rw

        stereo = 0

        if kw.has_key("stereo"):
            if kw["stereo"]:
                stereo = 1

        rw = None

        if kw.has_key("rw"):
            rw = kw["rw"]

        # create qt-level widget
        QtGui.QWidget.__init__(self, parent, wflags | QtCore.Qt.MSWindowsOwnDC)

        if rw:  # user-supplied render window
            self._RenderWindow = rw
        else:
            self._RenderWindow = vtk.vtkRenderWindow()

        if qt_api == "pyqt" or sys.platform != "win32":
            self._RenderWindow.SetWindowInfo(str(int(self.winId())))
        else:
            # On Windows PySide has a bug with winID() function, so this is fix:
            self._RenderWindow.SetWindowInfo(str(int(pythonapi.PyCObject_AsVoidPtr(self.winId()))))
        self._should_set_parent_info = sys.platform == "win32"

        if stereo:  # stereo mode
            self._RenderWindow.StereoCapableWindowOn()
            self._RenderWindow.SetStereoTypeToCrystalEyes()

        self._Iren = vtk.vtkGenericRenderWindowInteractor()
        self._Iren.SetRenderWindow(self._RenderWindow)

        # do all the necessary qt setup
        self.setAttribute(QtCore.Qt.WA_OpaquePaintEvent)
        self.setAttribute(QtCore.Qt.WA_PaintOnScreen)
        self.setMouseTracking(True)  # get all mouse events
        self.setFocusPolicy(QtCore.Qt.WheelFocus)
        self.setSizePolicy(QtGui.QSizePolicy(QtGui.QSizePolicy.Expanding, QtGui.QSizePolicy.Expanding))

        self._Timer = QtCore.QTimer(self)
        self.connect(self._Timer, QtCore.SIGNAL("timeout()"), self.TimerEvent)

        self._Iren.AddObserver("CreateTimerEvent", messenger.send)
        messenger.connect(self._Iren, "CreateTimerEvent", self.CreateTimer)
        self._Iren.AddObserver("DestroyTimerEvent", messenger.send)
        messenger.connect(self._Iren, "DestroyTimerEvent", self.DestroyTimer)
        render_window = self._Iren.GetRenderWindow()
        render_window.AddObserver("CursorChangedEvent", messenger.send)
        messenger.connect(render_window, "CursorChangedEvent", self.CursorChangedEvent)

    def __init__(self, parent=None, **kw):
        logging.debug("In QVTKRenderWindowInteractor::__init__()")
        # the current button
        self._ActiveButton = QtCore.Qt.NoButton

        # private attributes
        self.__oldFocus = None
        self.__saveX = 0
        self.__saveY = 0
        self.__saveModifiers = QtCore.Qt.NoModifier
        self.__saveButtons = QtCore.Qt.NoButton

        # do special handling of some keywords:
        # stereo, rw

        stereo = 0

        if kw.has_key('stereo'):
            if kw['stereo']:
                stereo = 1

        rw = None

        if kw.has_key('rw'):
            rw = kw['rw']

        # create qt-level widget
        #QtGui.QWidget.__init__(self, parent)
        #QtOpenGL.QGLWidget.__init__(self, parent)
        super(QVTKRenderWindowInteractor, self).__init__(parent)

        if rw:  # user-supplied render window
            self._RenderWindow = rw
        else:
            self._RenderWindow = vtk.vtkRenderWindow()
        if sys.platform == "win32":
            self._RenderWindow.SetWindowInfo(str(int(pythonapi.PyCObject_AsVoidPtr(self.winId()))))
        else:
            self._RenderWindow.SetWindowInfo(str(int(self.winId())))
        self._should_set_parent_info = (sys.platform == 'win32')

        if stereo:  # stereo mode
            self._RenderWindow.StereoCapableWindowOn()
            self._RenderWindow.SetStereoTypeToCrystalEyes()

        self._Iren = vtk.vtkGenericRenderWindowInteractor()
        self._Iren.SetRenderWindow(self._RenderWindow)

        # do all the necessary qt setup
        self.setAttribute(QtCore.Qt.WA_OpaquePaintEvent)
        self.setAttribute(QtCore.Qt.WA_PaintOnScreen)
        self.setMouseTracking(True)  # get all mouse events
        self.setFocusPolicy(QtCore.Qt.WheelFocus)
        self.setSizePolicy(QtGui.QSizePolicy(QtGui.QSizePolicy.Expanding, QtGui.QSizePolicy.Expanding))

        self._Timer = QtCore.QTimer(self)
        self.connect(self._Timer, QtCore.SIGNAL('timeout()'), self.TimerEvent)

        self._createTimerObserver = self._Iren.AddObserver('CreateTimerEvent', self.CreateTimer)
        self._destroyTimerObserver = self._Iren.AddObserver('DestroyTimerEvent', self.DestroyTimer)
        self._cursorObserver = self._Iren.GetRenderWindow().AddObserver('CursorChangedEvent',
                                                 self.CursorChangedEvent)