Fixed rotateLabels option for multiBarCharts

[kapexx]

Replaced 'text-transform' with correct attribute 'text-anchor' to set
rotation center of labels.

[kapexx]

Currently rotated labels are broken.

Commit fixed that:

[arlm]

I have merged your request on http://github.com/novus/nvd3/pull/63 (you can get it through my fork http://github.com/arlm/nvd3/tree/aggregated-pull-requests )

[bobmonteverde]

Hey, sorry for the delay, I'll work on getting all the pull requests merged in over the weekend

[reblace]

I was looking at this change and it's an improvement, but a more complete solution should correct the x/y offset of the label as it rotates so that the root of the label is centered on the tick and it maintains the same amount of padding from the axis itself. Otherwise the labels are offset to the left of center as the rotate angle gets closer to 90 degrees (and the anchor of the labels butt up against the axis). You can see this in the image I attached.

If I get a working patch that does these things, I'll put in a pull request and add another comment to this thread.

edit: After doing some looking, you can remove all the special handling that's in the multibar chart and just pass through the rotateLabels setting to the x axis (there's existing code in there to handle the rotation of the category labels). But, it still has the issue I mention that it doesn't center the label on the tick.

[twolfnovus]

A good temporary fix until the issue reblace mentioned can be addressed.