Show a tooltip when hover on the legend in a Pie Chart

[Ace McCloud]

Is there a method to show a tooltip when one hovers the mouse on the
legend in a PieChart? If yes, how can this be done?

If no, then is there a way to extend, modify PieChart to make this
possible? Is the source code open?

[asgallant]

As far as I know, there isn't any way to trigger the built-in tooltip on mouseover of the legend.  However, you can register event handlers for the 'mouseover' and 'mouseout' events thrown by the pie chart, which pass row and column indices for the data point in the dataTable which you can use to build your own tooltips.  The mouse events are thrown by both the pie slices and the legend entries.