Bad hover tooltip when using dates with PlotlyJS

[cstjean]

The x-axis tooltip in this example is a number instead of a date.

Interestingly, the tooltip works correctly when hovering over datapoints that are exactly over tick marks. The equivalent code works fine when using PlotlyJS directly. I assume that it's the same underlying issue as #1382, and probably #726

[pearlzli]

I'd also be interested in a fix to this. Does anyone have any ideas for how to get around this? I'd be happy to take a look at it, but I don't quite know where to begin.

[mkborregaard]

Maybe the solution is when the DateTimeFormatter runs (to create the date breaks on the x axis) to check if hover is set explicitly, and if it isn't set it explicitly with formatted dates.

[pearlzli]

I'll try that, thanks!

As an aside, I noticed that datetimeformatter, dateformatter, and timeformatter are not listed in the attributes table. I can add that via pull request if you want, but which file should I edit to do so?

[cstjean]

@pearlzli If you use ticks=:native, then the tooltip is correct.

[pearlzli]

@cstjean Yes, I just noticed this! However, I also want to do two more things: set my own tick-marks and show my dates as quarters (e.g. "2010-Q1" instead of "Mar 2010"). I'm trying to implement that now using the formatter attribute...

@mkborregaard Upon further investigation, I think the hover attribute changes the string that's displayed next to the actual data value (currently "15" in @cstjean's example), not the string displayed on the x-axis.

[mkborregaard]

That's right, sorry. I

[johnrichardrinehart]

@pearlzli I think this issue should be closed in light of ticks=:native solving this particular problem.