[vtkusers] key press event in vtkWeb

[ivan rodriguez]

Hello,

I'm using the module vtkWeb for Remote Rendering, following this simple
python example:

*https://github.com/dmreagan/vtk-remote-render/blob/master/server/vtk_server.py
<https://github.com/dmreagan/vtk-remote-render/blob/master/server/vtk_server.py>*

and I have modified it in order to include a keyPress event. The code works
but the
key event is not working . Please find my code below (the only modification
from the link is the class MyInteractorStyle ).

I'll really appreciate any help with this!

Thanks !!





##########################################################################
##########################################################################

# import to process args
import sys
import os

# import vtk modules.
import vtk
from vtk.web import protocols
from vtk.web import wslink as vtk_wslink
from wslink import server

try:
    import argparse
except ImportError:
    # since  Python 2.6 and earlier don't have argparse, we simply provide
    # the source for the same as _argparse and we use it instead.
    from vtk.util import _argparse as argparse

#
=============================================================================
# Create custom ServerProtocol class to handle clients requests
#
=============================================================================


class MyInteractorStyle(vtk.vtkInteractorStyleTrackballCamera):

    def __init__(self,renderer, cone):
        self.parent = renderer.GetInteractor()
self.resolution=5
self.cone = cone

        self.AddObserver("KeyPressEvent",self.keyPressEvent)

    def keyPressEvent(self,obj,event):
        key = self.parent.GetKeySym()
        if key == 'l':
    print(key)
    self.cone.SetResolution(self.resolution)
    self.resolution+=1
        return




class _WebCone(vtk_wslink.ServerProtocol):

    # Application configuration
    view    = None
    authKey = "wslink-secret"

    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)

            renderWindowInteractor = vtk.vtkRenderWindowInteractor()
            renderWindowInteractor.SetRenderWindow(renderWindow)



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

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


renderWindowInteractor.SetInteractorStyle(MyInteractorStyle(renderWindow,
cone))

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

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

  #  renderWindowInteractor.Start()

#
=============================================================================
# Main: Parse args and start server
#
=============================================================================

if __name__ == "__main__":
    # Create argument parser
    parser = argparse.ArgumentParser(description="VTK/Web Cone
web-application")

    # Add default arguments
    server.add_arguments(parser)

    # Extract arguments
    args = parser.parse_args()

    # Configure our current application
    _WebCone.authKey = args.authKey

    # Start server
    server.start_webserver(options=args, protocol=_WebCone)
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