::New();
_vtkAxesWidget->SetOutlineColor(0.9300, 0.5700, 0.1300);
_vtkAxesWidget->SetOrientationMarker(axes);
_vtkAxesWidget->SetInteractor(_vtkwidget->GetRenderWindow()->GetInteractor());
_vtkAxesWidget->SetViewport(0.0, 0.0, 0.2, 0.2);
_vtkAxesWidget->SetEnabled(1);
_vtkAxesWidget->InteractiveOn();
//--------------------------------------------------------------------------
```
So I guess this line:
> [@Ricardo\_M\_Picado](#):
>
> `om.SetInteractor(self.vtkWidget )`
should be:
```python
om.SetInteractor(self.vtkWidget.GetRenderWindow().GetInteractor())
```
I hope this helps.
---
### Author:  [@Ricardo\_M\_Picado](https://discourse.vtk.org/u/Ricardo_M_Picado)
#### Post date: [August 9, 2021, 3:15pm UTC](https://discourse.vtk.org/t/vtkorientationmarkerwidget-wont-show-in-pyqt5/6320/5 "2021-08-09T15:15:07Z")
Hi Paulo, thanks for the reply.
Sorry for source code, I didn’t know that. But, thanks for the tip.
Regarding the interactor, I have already tried that, and it does not work.
I thing it could be something with “vtkmodules.qt.QVTKRenderWindowInteractor”, because the code with vtk.vtkRenderWindowInteractor() works perfectly. Could it be?
Unfortunately, I just knew VTK a few weeks ago. There is still very much to learn …
Thanks again.
BR, Ricardo
---
### Author:  [@Paulo\_Carvalho](https://discourse.vtk.org/u/Paulo_Carvalho)
#### Post date: [August 10, 2021, 11:14am UTC](https://discourse.vtk.org/t/vtkorientationmarkerwidget-wont-show-in-pyqt5/6320/6 "2021-08-10T11:14:10Z")
Well, Ricardo, I’d simply copy the working code and develop from it step-by-step until it stops working. This way you should be able to diagnose the problem. That’s what I do in face of silent bugs like that.
---
### Author:  [@Ricardo\_M\_Picado](https://discourse.vtk.org/u/Ricardo_M_Picado)
#### Post date: [August 17, 2021, 10:20pm UTC](https://discourse.vtk.org/t/vtkorientationmarkerwidget-wont-show-in-pyqt5/6320/7 "2021-08-17T22:20:36Z")
Ok. Thank You.
---
### Author:  [@Hana](https://discourse.vtk.org/u/Hana)
#### Post date: [November 27, 2023, 4:08am UTC](https://discourse.vtk.org/t/vtkorientationmarkerwidget-wont-show-in-pyqt5/6320/8 "2023-11-27T04:08:09Z")
Hi Ricardo, I’ve faced the same problem with you, when using PyQt5 and vkt to develop a coordinate axes widget. Has this problem been solved yet?
---
### Author:  [@Hana](https://discourse.vtk.org/u/Hana)
#### Post date: [November 27, 2023, 4:37am UTC](https://discourse.vtk.org/t/vtkorientationmarkerwidget-wont-show-in-pyqt5/6320/9 "2023-11-27T04:37:25Z")
I’m not sure if you still need to solve this problem, but I’ve found a solution in this post:
> [@How to use vtkRenderWindowInteractor in QVTKOpenGLNativeWidget](https://discourse.vtk.org/t/how-to-use-vtkrenderwindowinteractor-in-qvtkopenglnativewidget/2499/3):
>
> According to your code, I define the oject ‘vtkOrientationMarkerWidget’ as a member variable of the class MyViewer instead of local variable in the function. It works! That’s the reason why I can not see the result. Thank you very much!
It seems that we both made a same mistake not to define the object ‘vtkOrientationMarkerWidget’ as a member of class ‘MainWindow’. Now my PyQt5 program can work normally.
And here is my code:
```python
class MainWindow(QtWidgets.QMainWindow):
def __init__ (self, parent = None):
super(). __init__ ()
# create QVTKRenderWindowInteractor
self.vtk_widget = QVTKRenderWindowInteractor(self)
# create render and interactor
self.renderer = vtk.vtkRenderer()
self.vtk_widget.GetRenderWindow().AddRenderer(self.renderer)
self.interactor = self.vtk_widget.GetRenderWindow().GetInteractor()
# create an axes actor, remember to define it as a member variable
self.axes_actor = vtkAxesActor()
self.axes_actor.AxisLabelsOn()
self.axes_actor.SetTotalLength(1.0, 1.0, 1.0)
self.axes_actor.SetShaftTypeToCylinder()
# create a vtkOrientationMarkerWidget, and connect it with axes actor. remember to define it as a member variable
self.axes_widget = vtk.vtkOrientationMarkerWidget()
self.axes_widget.SetOrientationMarker(self.axes_actor)
self.axes_widget.SetInteractor(self.interactor)
self.axes_widget.SetViewport(0.0, 0.0, 0.2, 0.2)
self.axes_widget.SetEnabled(True)
self.axes_widget.InteractiveOn()
# background color
self.renderer.SetBackground(0.8, 0.8, 0.8)
# model
self.sphere = vtk.vtkSphereSource()
self.sphere_mapper = vtk.vtkPolyDataMapper()
self.sphere_mapper.SetInputConnection(self.sphere.GetOutputPort())
self.sphere_actor = vtk.vtkActor()
self.sphere_actor.SetMapper(self.sphere_mapper)
self.renderer.AddActor(self.sphere_actor)
# camera
self.camera = self.renderer.GetActiveCamera()
self.camera.SetPosition(0, 0, 30)
self.renderer.SetActiveCamera(self.camera)
self.setCentralWidget(self.vtk_widget)
```
---
### Author:  [@Ricardo\_M\_Picado](https://discourse.vtk.org/u/Ricardo_M_Picado)
#### Post date: [November 28, 2023, 4:58pm UTC](https://discourse.vtk.org/t/vtkorientationmarkerwidget-wont-show-in-pyqt5/6320/10 "2023-11-28T16:58:22Z")
Thank you.