add nw-vertical-track to all comparing point to x-axis

[breadbaker]

[jaimedp]

Hi Dan!

Any reason not to do this as a separate visualization instead of inside tooltip? The general principle was to keep the visualizations small and simple so you can compose them to achieve what you want. I remember having this specific visualization somewhere as as stand alone :)

[breadbaker]

Do you by chance remember which one that was? I agree that by name I would not expect the tooltip to necessarily have this functionality. Although in implementation I was struggling to attach multiple mouseover listeners to the circle elements.

[narenranjit]

@breadbaker Is this http://jsfiddle.net/zecmfgj7/8/ similar to what you're looking for?

[narenranjit]

Closing this, Dan comment here if there are things this PR makes possible which isn't shown in the jsfiddle example.