Picking always returns ViewBox

[Pradeep J]

Trying out vispy as I am in need of a scenegraph implementation.

I expected the below code to return the SphereVisual/XYZAxisVisual when I click on it, but I always get a ViewBox instead.

c = scene.SceneCanvas(keys='interactive', show=True)

view = c.central_widget.add_view()
view.camera = 'arcball'

scene.Sphere(radius=0.5, parent=view.scene)
scene.visuals.XYZAxis(parent=view.scene)

@c.connect
def on_mouse_press(event):
   print c.visual_at(event.pos)

always prints:

<ViewBox at 0x55518f0>

I am guessing this some newbie mistake on my part, what is the right way to use visual_at() for picking visuals?

Thanks.

[Luke Campagnola]

Most visuals are not interactive by default; you need to set `visual.interactive = True` for each visual that you want to be pickable. However, in this case it seems to fail even when I do that for the sphere. Can you open an issue for this?

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[Pradeep J]

Thanks Luke, I'll file an issue.

[Evan]

A workaround is to temporarily make the view not interactive :

@c.connect
def on_mouse_press(event):
   view.interactive = False
   print c.visual_at(event.pos)
   view.interactive = True

Best regards,

Evan