Remote interaction. Gestures handling

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1

Dear All,
I am working with VTK-based remote vis from this template and I have to implement a gesture support.
It seems that for this I have to extend code with rpcGestureEvent similarly to how it is done for rpcRemoteWheel in
js code and python RPC implementation

However, I am not sure how to write a python part, what the event type and other data will be transferred and etc. Do I understand correctly that for this I should reference a vtkInteractorStyleRemoteMouse class ?
Is there any example of handling gestures in remote visualisation such as pinch, tap?

Thank you very much in advance,
Best regards,
Evgeniya

2

Update:
Sorry for the inconvenience. Turned out to be straightforward, according to data transmitted from vtkInteractorStyleRemoteMouse class.

For example, the pinch handling with camera zoom that worked for me:

@exportRpc(“viewport.gesture”)
def updateGesture(self, event):

  if 'StartPinch' in event["type"]:
    self.getApplication().InvokeEvent('StartInteractionEvent')
    renderWindow = self.getView(event['view'])
    print("StartPinch")
    camera = renderWindow.GetRenderers().GetFirstRenderer().GetActiveCamera()
    self.fp = camera.GetFocalPoint()
    self.pos = camera.GetPosition()
    
  if 'Pinch' in event["type"]:
    renderWindow = self.getView(event['view'])
    
    
    if renderWindow and 'scale' in event:
       scaleF=1.5
       zoomFactor = event['scale']/scaleF;

       camera = renderWindow.GetRenderers().GetFirstRenderer().GetActiveCamera()
       
       camera.Zoom(zoomFactor)
     
       renderWindow.Modified()

  if 'EndPinch' in event["type"]:
    self.getApplication().InvokeEvent('EndInteractionEvent')