# coding=utf-8 """ A simple VTK widget for PyQt or PySide. See http://www.trolltech.com for Qt documentation, http://www.riverbankcomputing.co.uk for PyQt, and http://pyside.github.io for PySide. This class is based on the vtkGenericRenderWindowInteractor and is therefore fairly powerful. It should also play nicely with the vtk3DWidget code. Created by Prabhu Ramachandran, May 2002 Based on David Gobbi's QVTKRenderWidget.py Changes by Gerard Vermeulen Feb. 2003 Win32 support. Changes by Gerard Vermeulen, May 2003 Bug fixes and better integration with the Qt framework. Changes by Phil Thompson, Nov. 2006 Ported to PyQt v4. Added support for wheel events. Changes by Phil Thompson, Oct. 2007 Bug fixes. Changes by Phil Thompson, Mar. 2008 Added cursor support. Changes by Rodrigo Mologni, Sep. 2013 (Credit to Daniele Esposti) Bug fix to PySide: Converts PyCObject to void pointer. Changes by Greg Schussman, Aug. 2014 The keyPressEvent function now passes keysym instead of None. Changes by Alex Tsui, Apr. 2015 Port from PyQt4 to PyQt5. Changes by Fabian Wenzel, Jan. 2016 Support for Python3 Changes by Tobias Hänel, Sep. 2018 Support for PySide2 Changes by Ruben de Bruin, Aug. 2019 Fixes to the keyPressEvent function Changes by Chen Jintao, Aug. 2021 Support for PySide6 Changes by Eric Larson and Guillaume Favelier, Apr. 2022 Support for PyQt6 """ # Check whether a specific PyQt implementation was chosen try: import vtkmodules.qt PyQtImpl = vtkmodules.qt.PyQtImpl except ImportError: pass # Check whether a specific QVTKRenderWindowInteractor base # class was chosen, can be set to "QGLWidget" in # PyQt implementation version lower than Qt6, # or "QOpenGLWidget" in Pyside6 and PyQt6 QVTKRWIBase = "QWidget" try: import vtkmodules.qt QVTKRWIBase = vtkmodules.qt.QVTKRWIBase except ImportError: pass from vtkmodules.vtkRenderingCore import vtkRenderWindow from vtkmodules.vtkRenderingUI import vtkGenericRenderWindowInteractor if PyQtImpl is None: # Autodetect the PyQt implementation to use try: import PySide6.QtCore PyQtImpl = "PySide6" except ImportError: try: import PyQt6.QtCore PyQtImpl = "PyQt6" except ImportError: try: import PyQt5.QtCore PyQtImpl = "PyQt5" except ImportError: try: import PySide2.QtCore PyQtImpl = "PySide2" except ImportError: try: import PyQt4.QtCore PyQtImpl = "PyQt4" except ImportError: try: import PySide.QtCore PyQtImpl = "PySide" except ImportError: raise ImportError("Cannot load either PyQt or PySide") # Check the compatibility of PyQtImpl and QVTKRWIBase if QVTKRWIBase != "QWidget": if PyQtImpl in ["PySide6", "PyQt6"] and QVTKRWIBase == "QOpenGLWidget": pass # compatible elif PyQtImpl in ["PyQt5", "PySide2","PyQt4", "PySide"] and QVTKRWIBase == "QGLWidget": pass # compatible else: raise ImportError("Cannot load " + QVTKRWIBase + " from " + PyQtImpl) if PyQtImpl == "PySide6": if QVTKRWIBase == "QOpenGLWidget": from PySide6.QtOpenGLWidgets import QOpenGLWidget from PySide6.QtWidgets import QWidget from PySide6.QtWidgets import QSizePolicy from PySide6.QtWidgets import QApplication from PySide6.QtWidgets import QMainWindow from PySide6.QtGui import QCursor from PySide6.QtCore import Qt from PySide6.QtCore import QTimer from PySide6.QtCore import QObject from PySide6.QtCore import QSize from PySide6.QtCore import QEvent elif PyQtImpl == "PyQt6": if QVTKRWIBase == "QOpenGLWidget": from PyQt6.QtOpenGLWidgets import QOpenGLWidget from PyQt6.QtWidgets import QWidget from PyQt6.QtWidgets import QSizePolicy from PyQt6.QtWidgets import QApplication from PyQt6.QtWidgets import QMainWindow from PyQt6.QtGui import QCursor from PyQt6.QtCore import Qt from PyQt6.QtCore import QTimer from PyQt6.QtCore import QObject from PyQt6.QtCore import QSize from PyQt6.QtCore import QEvent elif PyQtImpl == "PyQt5": if QVTKRWIBase == "QGLWidget": from PyQt5.QtOpenGL import QGLWidget from PyQt5.QtWidgets import QWidget from PyQt5.QtWidgets import QSizePolicy from PyQt5.QtWidgets import QApplication from PyQt5.QtWidgets import QMainWindow from PyQt5.QtGui import QCursor from PyQt5.QtCore import Qt from PyQt5.QtCore import QTimer from PyQt5.QtCore import QObject from PyQt5.QtCore import QSize from PyQt5.QtCore import QEvent elif PyQtImpl == "PySide2": if QVTKRWIBase == "QGLWidget": from PySide2.QtOpenGL import QGLWidget from PySide2.QtWidgets import QWidget from PySide2.QtWidgets import QSizePolicy from PySide2.QtWidgets import QApplication from PySide2.QtWidgets import QMainWindow from PySide2.QtGui import QCursor from PySide2.QtCore import Qt from PySide2.QtCore import QTimer from PySide2.QtCore import QObject from PySide2.QtCore import QSize from PySide2.QtCore import QEvent elif PyQtImpl == "PyQt4": if QVTKRWIBase == "QGLWidget": from PyQt4.QtOpenGL import QGLWidget from PyQt4.QtGui import QWidget from PyQt4.QtGui import QSizePolicy from PyQt4.QtGui import QApplication from PyQt4.QtGui import QMainWindow from PyQt4.QtCore import Qt from PyQt4.QtCore import QTimer from PyQt4.QtCore import QObject from PyQt4.QtCore import QSize from PyQt4.QtCore import QEvent elif PyQtImpl == "PySide": if QVTKRWIBase == "QGLWidget": from PySide.QtOpenGL import QGLWidget from PySide.QtGui import QWidget from PySide.QtGui import QSizePolicy from PySide.QtGui import QApplication from PySide.QtGui import QMainWindow from PySide.QtCore import Qt from PySide.QtCore import QTimer from PySide.QtCore import QObject from PySide.QtCore import QSize from PySide.QtCore import QEvent else: raise ImportError("Unknown PyQt implementation " + repr(PyQtImpl)) # Define types for base class, based on string if QVTKRWIBase == "QWidget": QVTKRWIBaseClass = QWidget elif QVTKRWIBase == "QGLWidget": QVTKRWIBaseClass = QGLWidget elif QVTKRWIBase == "QOpenGLWidget": QVTKRWIBaseClass = QOpenGLWidget else: raise ImportError("Unknown base class for QVTKRenderWindowInteractor " + QVTKRWIBase) if PyQtImpl == 'PyQt6': CursorShape = Qt.CursorShape MouseButton = Qt.MouseButton WindowType = Qt.WindowType WidgetAttribute = Qt.WidgetAttribute KeyboardModifier = Qt.KeyboardModifier FocusPolicy = Qt.FocusPolicy ConnectionType = Qt.ConnectionType Key = Qt.Key SizePolicy = QSizePolicy.Policy EventType = QEvent.Type else: CursorShape = MouseButton = WindowType = WidgetAttribute = \ KeyboardModifier = FocusPolicy = ConnectionType = Key = Qt SizePolicy = QSizePolicy EventType = QEvent if PyQtImpl in ('PyQt4', 'PySide'): MiddleButton = MouseButton.MidButton else: MiddleButton = MouseButton.MiddleButton def _get_event_pos(ev): try: # Qt6+ return ev.position().x(), ev.position().y() except AttributeError: # Qt5 return ev.x(), ev.y() class QVTKRenderWindowInteractor(QVTKRWIBaseClass): """ A QVTKRenderWindowInteractor for Python and Qt. Uses a vtkGenericRenderWindowInteractor to handle the interactions. Use GetRenderWindow() to get the vtkRenderWindow. Create with the keyword stereo=1 in order to generate a stereo-capable window. The user interface is summarized in vtkInteractorStyle.h: - Keypress j / Keypress t: toggle between joystick (position sensitive) and trackball (motion sensitive) styles. In joystick style, motion occurs continuously as long as a mouse button is pressed. In trackball style, motion occurs when the mouse button is pressed and the mouse pointer moves. - Keypress c / Keypress o: toggle between camera and object (actor) modes. In camera mode, mouse events affect the camera position and focal point. In object mode, mouse events affect the actor that is under the mouse pointer. - Button 1: rotate the camera around its focal point (if camera mode) or rotate the actor around its origin (if actor mode). The rotation is in the direction defined from the center of the renderer's viewport towards the mouse position. In joystick mode, the magnitude of the rotation is determined by the distance the mouse is from the center of the render window. - Button 2: pan the camera (if camera mode) or translate the actor (if object mode). In joystick mode, the direction of pan or translation is from the center of the viewport towards the mouse position. In trackball mode, the direction of motion is the direction the mouse moves. (Note: with 2-button mice, pan is defined as -Button 1.) - Button 3: zoom the camera (if camera mode) or scale the actor (if object mode). Zoom in/increase scale if the mouse position is in the top half of the viewport; zoom out/decrease scale if the mouse position is in the bottom half. In joystick mode, the amount of zoom is controlled by the distance of the mouse pointer from the horizontal centerline of the window. - Keypress 3: toggle the render window into and out of stereo mode. By default, red-blue stereo pairs are created. Some systems support Crystal Eyes LCD stereo glasses; you have to invoke SetStereoTypeToCrystalEyes() on the rendering window. Note: to use stereo you also need to pass a stereo=1 keyword argument to the constructor. - Keypress e: exit the application. - Keypress f: fly to the picked point - Keypress p: perform a pick operation. The render window interactor has an internal instance of vtkCellPicker that it uses to pick. - Keypress r: reset the camera view along the current view direction. Centers the actors and moves the camera so that all actors are visible. - Keypress s: modify the representation of all actors so that they are surfaces. - Keypress u: invoke the user-defined function. Typically, this keypress will bring up an interactor that you can type commands in. - Keypress w: modify the representation of all actors so that they are wireframe. """ # Map between VTK and Qt cursors. _CURSOR_MAP = { 0: CursorShape.ArrowCursor, # VTK_CURSOR_DEFAULT 1: CursorShape.ArrowCursor, # VTK_CURSOR_ARROW 2: CursorShape.SizeBDiagCursor, # VTK_CURSOR_SIZENE 3: CursorShape.SizeFDiagCursor, # VTK_CURSOR_SIZENWSE 4: CursorShape.SizeBDiagCursor, # VTK_CURSOR_SIZESW 5: CursorShape.SizeFDiagCursor, # VTK_CURSOR_SIZESE 6: CursorShape.SizeVerCursor, # VTK_CURSOR_SIZENS 7: CursorShape.SizeHorCursor, # VTK_CURSOR_SIZEWE 8: CursorShape.SizeAllCursor, # VTK_CURSOR_SIZEALL 9: CursorShape.PointingHandCursor, # VTK_CURSOR_HAND 10: CursorShape.CrossCursor, # VTK_CURSOR_CROSSHAIR } def __init__(self, parent=None, **kw): # the current button self._ActiveButton = MouseButton.NoButton # private attributes self.__saveX = 0 self.__saveY = 0 self.__saveModifiers = KeyboardModifier.NoModifier self.__saveButtons = MouseButton.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 = WindowType.Widget # what Qt.WindowFlags() returns (0) QWidget.__init__(self, parent, wflags | WindowType.MSWindowsOwnDC) elif QVTKRWIBase == "QGLWidget": QGLWidget.__init__(self, parent) elif QVTKRWIBase == "QOpenGLWidget": QOpenGLWidget.__init__(self, parent) if rw: # user-supplied render window self._RenderWindow = rw else: self._RenderWindow = 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 = vtkGenericRenderWindowInteractor() self._Iren.SetRenderWindow(self._RenderWindow) # do all the necessary qt setup self.setAttribute(WidgetAttribute.WA_OpaquePaintEvent) self.setAttribute(WidgetAttribute.WA_PaintOnScreen) self.setMouseTracking(True) # get all mouse events self.setFocusPolicy(FocusPolicy.WheelFocus) self.setSizePolicy(QSizePolicy(SizePolicy.Expanding, SizePolicy.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) # If we've a parent, it does not close the child when closed. # Connect the parent's destroyed signal to this widget's close # slot for proper cleanup of VTK objects. if self.parent(): self.parent().destroyed.connect(self.close, ConnectionType.DirectConnection) def __getattr__(self, attr): """Makes the object behave like a vtkGenericRenderWindowInteractor""" if attr == '__vtk__': return lambda t=self._Iren: t elif hasattr(self._Iren, attr): return getattr(self._Iren, attr) else: raise AttributeError(self.__class__.__name__ + " has no attribute named " + attr) def Finalize(self): ''' Call internal cleanup method on VTK objects ''' self._RenderWindow.Finalize() def CreateTimer(self, obj, evt): self._Timer.start(10) def DestroyTimer(self, obj, evt): self._Timer.stop() return 1 def TimerEvent(self): self._Iren.TimerEvent() def CursorChangedEvent(self, obj, evt): """Called when the CursorChangedEvent fires on the render window.""" # This indirection is needed since when the event fires, the current # cursor is not yet set so we defer this by which time the current # cursor should have been set. QTimer.singleShot(0, self.ShowCursor) def HideCursor(self): """Hides the cursor.""" self.setCursor(CursorShape.BlankCursor) def ShowCursor(self): """Shows the cursor.""" vtk_cursor = self._Iren.GetRenderWindow().GetCurrentCursor() qt_cursor = self._CURSOR_MAP.get(vtk_cursor, CursorShape.ArrowCursor) self.setCursor(qt_cursor) def closeEvent(self, evt): self.Finalize() def sizeHint(self): return QSize(400, 400) def paintEngine(self): return None def paintEvent(self, ev): self._Iren.Render() def resizeEvent(self, ev): scale = self._getPixelRatio() w = int(round(scale*self.width())) h = int(round(scale*self.height())) self._RenderWindow.SetDPI(int(round(72*scale))) vtkRenderWindow.SetSize(self._RenderWindow, w, h) self._Iren.SetSize(w, h) self._Iren.ConfigureEvent() self.update() def _GetKeyCharAndKeySym(self, ev): """ Convert a Qt key into a char and a vtk keysym. This is essentially copied from the c++ implementation in GUISupport/Qt/QVTKInteractorAdapter.cxx. """ # if there is a char, convert its ASCII code to a VTK keysym try: keyChar = ev.text()[0] keySym = _keysyms_for_ascii[ord(keyChar)] except IndexError: keyChar = '\0' keySym = None # next, try converting Qt key code to a VTK keysym if keySym is None: try: keySym = _keysyms[ev.key()] except KeyError: keySym = None # use "None" as a fallback if keySym is None: keySym = "None" return keyChar, keySym def _GetCtrlShift(self, ev): ctrl = shift = False if hasattr(ev, 'modifiers'): if ev.modifiers() & KeyboardModifier.ShiftModifier: shift = True if ev.modifiers() & KeyboardModifier.ControlModifier: ctrl = True else: if self.__saveModifiers & KeyboardModifier.ShiftModifier: shift = True if self.__saveModifiers & KeyboardModifier.ControlModifier: ctrl = True return ctrl, shift @staticmethod def _getPixelRatio(): if PyQtImpl in ["PyQt5", "PySide2", "PySide6", "PyQt6"]: # Source: https://stackoverflow.com/a/40053864/3388962 pos = QCursor.pos() for screen in QApplication.screens(): rect = screen.geometry() if rect.contains(pos): return screen.devicePixelRatio() # Should never happen, but try to find a good fallback. return QApplication.instance().devicePixelRatio() else: # Qt4 seems not to provide any cross-platform means to get the # pixel ratio. return 1. def _setEventInformation(self, x, y, ctrl, shift, key, repeat=0, keysum=None): scale = self._getPixelRatio() self._Iren.SetEventInformation(int(round(x*scale)), int(round((self.height()-y-1)*scale)), ctrl, shift, key, repeat, keysum) def enterEvent(self, ev): ctrl, shift = self._GetCtrlShift(ev) self._setEventInformation(self.__saveX, self.__saveY, ctrl, shift, chr(0), 0, None) self._Iren.EnterEvent() def leaveEvent(self, ev): ctrl, shift = self._GetCtrlShift(ev) self._setEventInformation(self.__saveX, self.__saveY, ctrl, shift, chr(0), 0, None) self._Iren.LeaveEvent() def mousePressEvent(self, ev): ctrl, shift = self._GetCtrlShift(ev) repeat = 0 if ev.type() == EventType.MouseButtonDblClick: repeat = 1 x, y = _get_event_pos(ev) self._setEventInformation(x, y, ctrl, shift, chr(0), repeat, None) self._ActiveButton = ev.button() if self._ActiveButton == MouseButton.LeftButton: self._Iren.LeftButtonPressEvent() elif self._ActiveButton == MouseButton.RightButton: self._Iren.RightButtonPressEvent() elif self._ActiveButton == MiddleButton: self._Iren.MiddleButtonPressEvent() def mouseReleaseEvent(self, ev): ctrl, shift = self._GetCtrlShift(ev) x, y = _get_event_pos(ev) self._setEventInformation(x, y, ctrl, shift, chr(0), 0, None) if self._ActiveButton == MouseButton.LeftButton: self._Iren.LeftButtonReleaseEvent() elif self._ActiveButton == MouseButton.RightButton: self._Iren.RightButtonReleaseEvent() elif self._ActiveButton == MiddleButton: self._Iren.MiddleButtonReleaseEvent() def mouseMoveEvent(self, ev): self.__saveModifiers = ev.modifiers() self.__saveButtons = ev.buttons() x, y = _get_event_pos(ev) self.__saveX = x self.__saveY = y ctrl, shift = self._GetCtrlShift(ev) self._setEventInformation(x, y, ctrl, shift, chr(0), 0, None) self._Iren.MouseMoveEvent() def keyPressEvent(self, ev): key, keySym = self._GetKeyCharAndKeySym(ev) ctrl, shift = self._GetCtrlShift(ev) self._setEventInformation(self.__saveX, self.__saveY, ctrl, shift, key, 0, keySym) self._Iren.KeyPressEvent() self._Iren.CharEvent() def keyReleaseEvent(self, ev): key, keySym = self._GetKeyCharAndKeySym(ev) ctrl, shift = self._GetCtrlShift(ev) self._setEventInformation(self.__saveX, self.__saveY, ctrl, shift, key, 0, keySym) self._Iren.KeyReleaseEvent() def wheelEvent(self, ev): if hasattr(ev, 'delta'): self.__wheelDelta += ev.delta() else: self.__wheelDelta += ev.angleDelta().y() if self.__wheelDelta >= 120: self._Iren.MouseWheelForwardEvent() self.__wheelDelta = 0 elif self.__wheelDelta <= -120: self._Iren.MouseWheelBackwardEvent() self.__wheelDelta = 0 def GetRenderWindow(self): return self._RenderWindow def Render(self): self.update() def QVTKRenderWidgetConeExample(): """A simple example that uses the QVTKRenderWindowInteractor class.""" from vtkmodules.vtkFiltersSources import vtkConeSource from vtkmodules.vtkRenderingCore import vtkActor, vtkPolyDataMapper, vtkRenderer # load implementations for rendering and interaction factory classes import vtkmodules.vtkRenderingOpenGL2 import vtkmodules.vtkInteractionStyle # every QT app needs an app app = QApplication(['QVTKRenderWindowInteractor']) window = QMainWindow() # create the widget widget = QVTKRenderWindowInteractor(window) window.setCentralWidget(widget) # if you don't want the 'q' key to exit comment this. widget.AddObserver("ExitEvent", lambda o, e, a=app: a.quit()) ren = vtkRenderer() widget.GetRenderWindow().AddRenderer(ren) cone = vtkConeSource() cone.SetResolution(8) coneMapper = vtkPolyDataMapper() coneMapper.SetInputConnection(cone.GetOutputPort()) coneActor = vtkActor() coneActor.SetMapper(coneMapper) ren.AddActor(coneActor) # show the widget window.show() widget.Initialize() widget.Start() # start event processing # Source: https://doc.qt.io/qtforpython/porting_from2.html # 'exec_' is deprecated and will be removed in the future. # Use 'exec' instead. try: app.exec() except AttributeError: app.exec_() _keysyms_for_ascii = ( None, None, None, None, None, None, None, None, None, "Tab", None, None, None, None, None, None, None, None, None, None, None, None, None, None, None, None, None, None, None, None, None, None, "space", "exclam", "quotedbl", "numbersign", "dollar", "percent", "ampersand", "quoteright", "parenleft", "parenright", "asterisk", "plus", "comma", "minus", "period", "slash", "0", "1", "2", "3", "4", "5", "6", "7", "8", "9", "colon", "semicolon", "less", "equal", "greater", "question", "at", "A", "B", "C", "D", "E", "F", "G", "H", "I", "J", "K", "L", "M", "N", "O", "P", "Q", "R", "S", "T", "U", "V", "W", "X", "Y", "Z", "bracketleft", "backslash", "bracketright", "asciicircum", "underscore", "quoteleft", "a", "b", "c", "d", "e", "f", "g", "h", "i", "j", "k", "l", "m", "n", "o", "p", "q", "r", "s", "t", "u", "v", "w", "x", "y", "z", "braceleft", "bar", "braceright", "asciitilde", "Delete", ) _keysyms = { Key.Key_Backspace: 'BackSpace', Key.Key_Tab: 'Tab', Key.Key_Backtab: 'Tab', # Key.Key_Clear : 'Clear', Key.Key_Return: 'Return', Key.Key_Enter: 'Return', Key.Key_Shift: 'Shift_L', Key.Key_Control: 'Control_L', Key.Key_Alt: 'Alt_L', Key.Key_Pause: 'Pause', Key.Key_CapsLock: 'Caps_Lock', Key.Key_Escape: 'Escape', Key.Key_Space: 'space', # Key.Key_Prior : 'Prior', # Key.Key_Next : 'Next', Key.Key_End: 'End', Key.Key_Home: 'Home', Key.Key_Left: 'Left', Key.Key_Up: 'Up', Key.Key_Right: 'Right', Key.Key_Down: 'Down', Key.Key_SysReq: 'Snapshot', Key.Key_Insert: 'Insert', Key.Key_Delete: 'Delete', Key.Key_Help: 'Help', Key.Key_0: '0', Key.Key_1: '1', Key.Key_2: '2', Key.Key_3: '3', Key.Key_4: '4', Key.Key_5: '5', Key.Key_6: '6', Key.Key_7: '7', Key.Key_8: '8', Key.Key_9: '9', Key.Key_A: 'a', Key.Key_B: 'b', Key.Key_C: 'c', Key.Key_D: 'd', Key.Key_E: 'e', Key.Key_F: 'f', Key.Key_G: 'g', Key.Key_H: 'h', Key.Key_I: 'i', Key.Key_J: 'j', Key.Key_K: 'k', Key.Key_L: 'l', Key.Key_M: 'm', Key.Key_N: 'n', Key.Key_O: 'o', Key.Key_P: 'p', Key.Key_Q: 'q', Key.Key_R: 'r', Key.Key_S: 's', Key.Key_T: 't', Key.Key_U: 'u', Key.Key_V: 'v', Key.Key_W: 'w', Key.Key_X: 'x', Key.Key_Y: 'y', Key.Key_Z: 'z', Key.Key_Asterisk: 'asterisk', Key.Key_Plus: 'plus', Key.Key_Minus: 'minus', Key.Key_Period: 'period', Key.Key_Slash: 'slash', Key.Key_F1: 'F1', Key.Key_F2: 'F2', Key.Key_F3: 'F3', Key.Key_F4: 'F4', Key.Key_F5: 'F5', Key.Key_F6: 'F6', Key.Key_F7: 'F7', Key.Key_F8: 'F8', Key.Key_F9: 'F9', Key.Key_F10: 'F10', Key.Key_F11: 'F11', Key.Key_F12: 'F12', Key.Key_F13: 'F13', Key.Key_F14: 'F14', Key.Key_F15: 'F15', Key.Key_F16: 'F16', Key.Key_F17: 'F17', Key.Key_F18: 'F18', Key.Key_F19: 'F19', Key.Key_F20: 'F20', Key.Key_F21: 'F21', Key.Key_F22: 'F22', Key.Key_F23: 'F23', Key.Key_F24: 'F24', Key.Key_NumLock: 'Num_Lock', Key.Key_ScrollLock: 'Scroll_Lock', } if __name__ == "__main__": print(PyQtImpl) QVTKRenderWidgetConeExample()