Tooltip positions are wrong around north in a polar chart

[TorsteinHonsi]

1. Open http://jsfiddle.net/ptd5e/1/
2. Hover over the line series, then move the mouse from the north to the west point.
3. The tooltip shifts directly to the left of the north point, while it is expected to shift midway between them, at northwest position.

[TorsteinHonsi]

It's because the line is wrapped around the perimiter of the chart as a consequence of the connectEnds option. In the setTooltipPositions method, the first point should be considered. In order to fix it, the Series.connectEnds property, that is currently set in the extended getSegmentPath method, must be set earlier. Then this property must be checked in the setTooltipPoints method, and the first point must be appended to the points array so that it is taken into account when X positions are computed.

[markmsmith]

Just adding a +1 in favor of fixing this, since I also encountered this bug today.

[hofo]

+1, just ran into this as well.

[markmsmith]

This is awesome, thanks for fixing it!
Do you know when the next stable release is going to be cut? We'd rather not run on bleeding-edge master.

[TorsteinHonsi]

It will be out in a few weeks. To avoid running the master, you can also
consider applying the patch for this one bug fix. Then you can compile the
source code at closure-compiler.appspot.com/home.

[markmsmith]

Thanks, I appreciate it.