Hello Christophe,
I once addapted the QVTKRenderWindowInteractor to work
with the latest release of pyqt. Unfortunately it's not
perfect yet and it does work only on my windows machine.
So should you make improvements to it, please post it
back.
Regards,
Erik
On Sun, 2009-02-08 at 00:57 +0100, projet...@club-internet.fr wrote:
> pyqt@riverbankcomputing.com
from PyQt4 import QtCore, QtGui
import vtk
class QVTKRenderWindowInteractor(QtGui.QWidget):
""" 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 <Shift>-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.
"""
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()
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._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)
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 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 paintEvent(self, ev):
self.Render()
def resizeEvent(self, ev):
self._Iren.SetSize(self.width(), self.height())
self._Iren.ConfigureEvent()
def _GetCtrlShift(self, ev):
ctrl = shift = False
if hasattr(ev, 'modifiers'):
if ev.modifiers() & QtCore.Qt.ShiftModifier:
shift = True
if ev.modifiers() & QtCore.Qt.ControlModifier:
ctrl = True
else:
if self.__saveModifiers & QtCore.Qt.ShiftModifier:
shift = True
if self.__saveModifiers & QtCore.Qt.ControlModifier:
ctrl = True
return ctrl, shift
def enterEvent(self, ev):
if not self.hasFocus():
self.__oldFocus = self.focusWidget()
self.setFocus()
ctrl, shift = self._GetCtrlShift(ev)
self._Iren.SetEventInformationFlipY(self.__saveX, self.__saveY,
ctrl, shift, chr(0), 0, None)
self._Iren.EnterEvent()
def leaveEvent(self, ev):
if self.__saveButtons == QtCore.Qt.NoButton and self.__oldFocus:
self.__oldFocus.setFocus()
self.__oldFocus = None
ctrl, shift = self._GetCtrlShift(ev)
self._Iren.SetEventInformationFlipY(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() == QtCore.QEvent.MouseButtonDblClick:
repeat = 1
self._Iren.SetEventInformationFlipY(ev.x(), ev.y(),
ctrl, shift, chr(0), repeat, None)
self._ActiveButton = ev.button()
if self._ActiveButton == QtCore.Qt.LeftButton:
self._Iren.LeftButtonPressEvent()
elif self._ActiveButton == QtCore.Qt.RightButton:
self._Iren.RightButtonPressEvent()
elif self._ActiveButton == QtCore.Qt.MidButton:
self._Iren.MiddleButtonPressEvent()
def mouseReleaseEvent(self, ev):
ctrl, shift = self._GetCtrlShift(ev)
self._Iren.SetEventInformationFlipY(ev.x(), ev.y(),
ctrl, shift, chr(0), 0, None)
if self._ActiveButton == QtCore.Qt.LeftButton:
self._Iren.LeftButtonReleaseEvent()
elif self._ActiveButton == QtCore.Qt.RightButton:
self._Iren.RightButtonReleaseEvent()
elif self._ActiveButton == QtCore.Qt.MidButton:
self._Iren.MiddleButtonReleaseEvent()
def mouseMoveEvent(self, ev):
self.__saveModifiers = ev.modifiers()
self.__saveButtons = ev.buttons()
self.__saveX = ev.x()
self.__saveY = ev.y()
ctrl, shift = self._GetCtrlShift(ev)
self._Iren.SetEventInformationFlipY(ev.x(), ev.y(),
ctrl, shift, chr(0), 0, None)
self._Iren.MouseMoveEvent()
def keyPressEvent(self, ev):
ctrl, shift = self._GetCtrlShift(ev)
if ev.key() < 256:
key = str(ev.text())
else:
key = chr(0)
self._Iren.SetEventInformationFlipY(self.__saveX, self.__saveY,
ctrl, shift, key, 0, None)
self._Iren.KeyPressEvent()
self._Iren.CharEvent()
def keyReleaseEvent(self, ev):
ctrl, shift = self._GetCtrlShift(ev)
if ev.key() < 256:
key = chr(ev.key())
else:
key = chr(0)
self._Iren.SetEventInformationFlipY(self.__saveX, self.__saveY,
ctrl, shift, key, 0, None)
self._Iren.KeyReleaseEvent()
def wheelEvent(self, ev):
if ev.delta() >= 0:
self._Iren.MouseWheelForwardEvent()
else:
self._Iren.MouseWheelBackwardEvent()
def GetRenderWindow(self):
return self._RenderWindow
def Render(self):
self._RenderWindow.Render()
def QVTKRenderWidgetConeExample():
import sys
app = QtGui.QApplication(sys.argv)
widget = QVTKRenderWindowInteractor()
widget.Initialize()
widget.Start()
# if you dont want the 'q' key to exit comment this.
widget.AddObserver("ExitEvent", lambda o, e, a=app: a.quit())
ren = vtk.vtkRenderer()
widget.GetRenderWindow().AddRenderer(ren)
cone = vtk.vtkConeSource()
cone.SetResolution(8)
coneMapper = vtk.vtkPolyDataMapper()
coneMapper.SetInput(cone.GetOutput())
coneActor = vtk.vtkActor()
coneActor.SetMapper(coneMapper)
ren.AddActor(coneActor)
# show the widget
widget.show()
app.exec_()
if __name__ == "__main__":
QVTKRenderWidgetConeExample()
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