I've successfully created a custom legend for a pie chart following this example http://jsfiddle.net/N3KAC/1/
I've fleshed it out so I also have `mouseover` and `mouseout` event listeners which toggle the state to and from "hover" / "normal" of the series and this works great. However the pie chart has drilldown data and this means the legend needs to be updated when viewing the drilldowns to reflect the drilldown data - can anyone point me in the direction to get that working?
The drilldown data is supplied in the `drilldown` part of the JS object as opposed to fetched async.