[vtkusers] QVTKWidget mouse event in python

[Clinton Stimpson]

Apparently, PyQt doesn't support vtk classes through slots.  I'm not yet sure 
why.  But when I try, I get 
"TypeError: type 'vtkclass' is not supported as a pyqtSlot type argument type"

But, I've attached your example modified which shows how to get the mouse 
positions when moving the mouse, if that's the kind of thing you want.

Maybe someone else has used VTK with PyQt to give some ideas about VTK types 
in PyQt slots.

Clint

On Friday, September 17, 2010 09:37:03 am Nicola Creati wrote:
> Hello,
> thank you Clinton I works! Just a question is it possible to pass
> arguments to the 'myslot' SLOT? and how?
> 
> Nicola
> 
> Clinton Stimpson wrote:
> > You just need to do the following to keep the objects from going out of
> > scope self.connections = vtk.vtkEventQtSlotConnect()
> > self.t = TestConnection()
> > 
> > Clint
> > 
> > On Friday, September 17, 2010 08:22:48 am Nicola Creati wrote:
> >> Hello,
> >> I tried to use vtkEventQtSlotConnect but it does not work in my code. I
> >> wrote a small example that showes what I'm trying to do.
> >> 
> >> Nicola
> >> 
> >> import vtk
> >> from PyQt4.QtGui import *
> >> from PyQt4.QtCore import *
> >> import sys
> >> 
> >> class TestConnection(QObject):
> >>   @pyqtSlot()
> >>   
> >>   def myslot(self):
> >>     print 'event'
> >> 
> >> class MainWindow(QMainWindow):
> >>   def __init__(self, parent=None):
> >>     super(MainWindow, self).__init__(parent)
> >>     
> >>     # Add the vtk window rwi
> >>     self.qvtk = vtk.QVTKWidget()
> >>     self.ren = vtk.vtkRenderer()
> >>     
> >>     self.rw = vtk.vtkRenderWindow()
> >>     self.rw.AddRenderer(self.ren)
> >>     self.qvtk.SetRenderWindow(self.rw)
> >>     
> >>     self.setCentralWidget(self.qvtk)
> >>     
> >>     connections = vtk.vtkEventQtSlotConnect()
> >>     t = TestConnection()
> >>     connections.Connect(self.qvtk.GetInteractor().GetInteractorStyle(),
> >>     
> >>                                       vtk.vtkCommand.MouseMoveEvent,
> >>                                       t,
> >>                                       SLOT('myslot()'), "", 0.0,
> >> 
> >> Qt.AutoConnection)
> >> 
> >> if __name__ == "__main__":
> >>   app = QApplication(sys.argv)
> >>   w = MainWindow()
> >>   w.show()
> >>   app.exec_()
> >> 
> >> Eric E. Monson wrote:
> >>> Hey Nicola,
> >>> 
> >>> I haven't used this myself, so hopefully someone else can also help
> >>> with more details, but I think what you need to use is
> >>> vtkEventQtSlotConnect:
> >>> 
> >>> http://www.vtk.org/doc/nightly/html/classvtkEventQtSlotConnect.html
> >>> 
> >>> On that page there are links to two examples (C++) and a test (Python).
> >>> The Python test is pretty minimal, so you'll probably have to look at
> >>> those cxx tests to get more ideas of how to use it. I think the Qt
> >>> events example in [vtk_src]/Examples/GUI/Qt/Events/GUI4.cxx will be
> >>> most useful.
> >>> 
> >>> Good luck,
> >>> -Eric
> >>> 
> >>> ------------------------------------------------------
> >>> Eric E Monson
> >>> Duke Visualization Technology Group
> >>> 
> >>> On Sep 17, 2010, at 6:52 AM, Nicola Creati wrote:
> >>>> Hello,
> >>>> I'm using the new QVTKWidget wrapped in python and I need to capture
> >>>> mouse events. If I add an observer to the interactor style I can easly
> >>>> capture any mouse event. On the Qt side I cannot get any mouse events
> >>>> occurring in my QVTKWidgets. Is there a way to get it?
> >>>> 
> >>>> Thanks.
> >>>> 
> >>>> Nicola
> >>>> 
> >>>> 
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