Customize TapStream

Hi all,
I am using a TapStream. The source is a DynamicMap with a few hv.Curve Elements. It would be nice if I could configure the stream in a way that the Stream just takes action if the hv.Curve elements are selected and not if the area between is clicked.
Is their something like stream Opts?

I think you just want the Selection1D stream instead which will give you the indexes of the selected curves.