Camera Controls and Screenshots

[staceywhitmore-inl]

I've searched the discussions and can't seem to find much on this topic but what methods might I call to access camera controls such as Move Speed, Rotate Speed, and Zoom Speed in a Trame application that is remote rendered using a Paraview instance on the backend?
So, far the only camera method I've come across on the controller is .view_reset_camera(). (...and .CameraPosition(), .CameraFocalPoint(), and .CameraParallelScale() for the active render view).

How might I accessing these 3 camera controls (move speed, rotate speed, and zoom speed) so that I can add VSliders to adjust them?
Or where is a good place to search for documentation on these methods?

Also, once I've established a desired camera angle, are there ready-baked methods for easily taking a screenshot of the model in the window to save it as a .jpg or .png and wiring this functionality to say a VButton? Or, will I need to write some custom Javascript for this or tap into an existing API such as Chrome's Broswser API for something like captureVisibleTab ?

[jourdain]

I guess the question would be how you set those in ParaView or in VTK from Python. So not a trame question.

For capturing the image you should be using VTK/ParaView API and then provide a mechanism to download that file to the client.

[jourdain]

@trigger("download_screenshot") # @ctrl.trigger
def download_screenshot(self):
        SERVER_PATH = Path("D:\\DATA\\screenshot.png")
        simple.SaveScreenshot(str(SERVER_PATH))
        return server.protocol.addAttachment(SERVER_PATH.read_bytes())

[jourdain]

This is covered in the documentation.

[staceywhitmore-inl]

I'll take a look. Thanks!

[jourdain]

Actually with trame 3.6+ you should be able to just do

@trigger("download_screenshot") # @ctrl.trigger
def download_screenshot(self):
        SERVER_PATH = Path("D:\\DATA\\screenshot.png")
        simple.SaveScreenshot(str(SERVER_PATH))
        return SERVER_PATH.read_bytes()

[staceywhitmore-inl]

Yes, this worked. Thanks!