# vtk-js remoteview example get any widget interaction
**URL:** https://discourse.vtk.org/t/vtk-js-remoteview-example-get-any-widget-interaction/6157
**Category:** Web
**Created:** [July 9, 2021, 7:55am UTC](https://discourse.vtk.org/t/vtk-js-remoteview-example-get-any-widget-interaction/6157 "2021-07-09T07:55:06Z")
**Posts on this page:** 11
**Page:** 1
### Author:  [@ss59](https://discourse.vtk.org/u/ss59)
#### Post date: [July 9, 2021, 7:55am UTC](https://discourse.vtk.org/t/vtk-js-remoteview-example-get-any-widget-interaction/6157/1 "2021-07-09T07:55:06Z")
Hello, Sorry about my simple question. I was testing remoteview using exist example. (vtk\_server.py). I added a simple vtkBoxWidget. After I couldn’t any interaction on remoteview or when I interact window the session crashed. How can I interact with this widget on remoteview. Please help me and give me suggestions.
I used the link [https://kitware.github.io/vtk-js/examples/RemoteView.html](https://kitware.github.io/vtk-js/examples/RemoteView.html)
boxWidget code is below,
```
boxWidget = vtk.vtkBoxWidget()
boxWidget.SetInteractor(renderWindowInteractor)
boxWidget.SetProp3D(actor)
boxWidget.SetPlaceFactor(1.25)
boxWidget.PlaceWidget()
boxWidget.On()
```
---
### Author:  [@lambacini](https://discourse.vtk.org/u/lambacini)
#### Post date: [July 9, 2021, 12:46pm UTC](https://discourse.vtk.org/t/vtk-js-remoteview-example-get-any-widget-interaction/6157/2 "2021-07-09T12:46:40Z")
Can you define box widget as global (variable) and try ? Probably your problem will be solved.
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### Author:  [@ss59](https://discourse.vtk.org/u/ss59)
#### Post date: [July 9, 2021, 12:58pm UTC](https://discourse.vtk.org/t/vtk-js-remoteview-example-get-any-widget-interaction/6157/3 "2021-07-09T12:58:53Z")
If you define in python initialize method any widgets. You can solve this problem. But I didn’t understand why we are defining it like this.
why is that! I need to learn the reason.
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### Author:  [@Sebastien\_Jourdain](https://discourse.vtk.org/u/Sebastien_Jourdain)
#### Post date: [July 9, 2021, 10:28pm UTC](https://discourse.vtk.org/t/vtk-js-remoteview-example-get-any-widget-interaction/6157/4 "2021-07-09T22:28:46Z")
Please share your code otherwise it is hard to tell where it was defined. Initialize method is only called onced and only when the server is ready. I’m not sure where you put your code before.
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### Author:  [@ss59](https://discourse.vtk.org/u/ss59)
#### Post date: [July 12, 2021, 6:20am UTC](https://discourse.vtk.org/t/vtk-js-remoteview-example-get-any-widget-interaction/6157/5 "2021-07-12T06:20:32Z")
Hello, Thank u for your interest. If I write the box widget on initializing method its works. But it actually has to work like this, isn’t it?
```auto
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.vtkWebPublishImageDelivery(decode=False))
self.registerVtkWebProtocol(protocols.vtkWebViewPortGeometryDelivery())
# Update authentication key to use
self.updateSecret(_WebCone.authKey)
# tell the C++ web app to use no encoding.
# ParaViewWebPublishImageDelivery must be set to decode=False to match.
self.getApplication().SetImageEncoding(0)
# 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)
renderWindowInteractor.GetInteractorStyle().SetCurrentStyleToTrackballCamera()
cone = vtk.vtkConeSource()
mapper = vtk.vtkPolyDataMapper()
actor = vtk.vtkActor()
mapper.SetInputConnection(cone.GetOutputPort())
actor.SetMapper(mapper)
renderer.AddActor(actor)
boxWidget = vtk.vtkBoxWidget()
boxWidget.SetInteractor(renderWindowInteractor)
boxWidget.SetProp3D(actor)
boxWidget.SetPlaceFactor(1.25)
boxWidget.PlaceWidget()
boxWidget.On()
renderer.ResetCamera()
renderWindow.Render()
# VTK Web application specific
_WebCone.view = renderWindow
self.getApplication().GetObjectIdMap().SetActiveObject("VIEW", renderWindow)
```
---
### Author:  [@Sebastien\_Jourdain](https://discourse.vtk.org/u/Sebastien_Jourdain)
#### Post date: [July 27, 2021, 1:55am UTC](https://discourse.vtk.org/t/vtk-js-remoteview-example-get-any-widget-interaction/6157/6 "2021-07-27T01:55:04Z")
yes
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### Author:  [@bernland](https://discourse.vtk.org/u/bernland)
#### Post date: [October 21, 2021, 3:36pm UTC](https://discourse.vtk.org/t/vtk-js-remoteview-example-get-any-widget-interaction/6157/7 "2021-10-21T15:36:51Z")
What did you do to resolve this issue? I also followed the example from [vtk.js](https://kitware.github.io/vtk-js/examples/RemoteView.html)
The Python script stalls, I cannot rotate the cone or zoom.
Thank you,
Bernhard
---
### Author:  [@Sebastien\_Jourdain](https://discourse.vtk.org/u/Sebastien_Jourdain)
#### Post date: [October 21, 2021, 6:03pm UTC](https://discourse.vtk.org/t/vtk-js-remoteview-example-get-any-widget-interaction/6157/8 "2021-10-21T18:03:14Z")
Which version of VTK are you using?
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### Author:  [@bernland](https://discourse.vtk.org/u/bernland)
#### Post date: [October 21, 2021, 8:22pm UTC](https://discourse.vtk.org/t/vtk-js-remoteview-example-get-any-widget-interaction/6157/9 "2021-10-21T20:22:46Z")
VTK 9.0.3 (installed through pip) and Python 3.8
@kitware/vtk.js 20.1.0 (installed through npm)
---
### Author:  [@Sebastien\_Jourdain](https://discourse.vtk.org/u/Sebastien_Jourdain)
#### Post date: [October 21, 2021, 8:56pm UTC](https://discourse.vtk.org/t/vtk-js-remoteview-example-get-any-widget-interaction/6157/10 "2021-10-21T20:56:01Z")
Can you start your own thread describing your issue. I’m guessing it is just running the example as-is? Or are you editing the code with other stuff?
---
### Author:  [@bernland](https://discourse.vtk.org/u/bernland)
#### Post date: [November 2, 2021, 1:35pm UTC](https://discourse.vtk.org/t/vtk-js-remoteview-example-get-any-widget-interaction/6157/11 "2021-11-02T13:35:38Z")
After reading [Unable to get RemoteView outputs on client side](https://discourse.vtk.org/t/unable-to-get-remoteview-outputs-on-client-side/6944), I updated to the following version:
- Python 3.9
- VTK 9.1.0rc4
The example is now working, thank you for your support.