Hover over lines/series

[mark-raymond]

Currently, a hover event is raised any time the mouse moves over the graph. You are given the position of the mouse, and the data point the mouse is over if the mouse is over a data point. It would be useful if the event also gave you the series that the mouse is over, even when the mouse is not currently hovering over an individual point.

[loriopatrick]

It does sound useful, however the implementation would probably be a little too computationally heavy to be ran every on every mouse move event. I don't think the feature should be added to the event handler as the performance hit would not be worth it for many. With that said, it would make a great plugin. I'll try and mock up a method that adds this feature later this week.

[dnschnur]

We're reworking a lot of the interaction stuff for 0.9; the idea is to allow individual plugins (internal line/area/point as well as external pie/etc.) to define their own iteraction behaviors.

Performance isn't a big concern, since there's already a mechanism (the per-series hoverable property) to disable interaction on a per-series basis.