I was unsure about the best wording for the title if someone has a better suggestion please edit.

With V10 or V11 on OS X if you evaluate the following (with PerformanceGoal->"Quality"):

BarChart[{Range[50], Range[50]},ImageSize -> 600]


BarChart[{Range[49], Range[49]},ImageSize -> 600]

You will see that the dynamic tooltip and dynamic bar "highlighting" stop when you add the 50th bar. I'm assuming that this might be controlled by a SystemOption. Does anyone know what is controlling this behaviour and how this apparent cut-off can be modified?

enter image description here

  • $\begingroup$ Does BarChart[{Tooltip/@Range[50],Tooltip/@ Range[50]}, ...] work as expected? $\endgroup$
    – kglr
    Mar 27, 2017 at 2:54
  • $\begingroup$ perhaps related: Strange Behavior in Barchart LabelingFunction $\endgroup$
    – kglr
    Mar 27, 2017 at 3:14
  • $\begingroup$ @kglr that restores the tooltips but not the bar "highlighting". My interest is not in work arounds but in understanding what is driving the behaviour $\endgroup$ Mar 27, 2017 at 3:25

1 Answer 1


The limit is not controlled by any option. You can construct your own ChartElementFunction that has a mouseover effect:

BarChart[{Range[50], Range[50]}, ImageSize -> 600, 
 ChartElementFunction -> (Mouseover[
     Rectangle @@ Transpose[#], {EdgeForm[Opacity[0.25]], 
      Rectangle @@ Transpose[#]}] &)]
  • $\begingroup$ Thanks Brett. Does that mean the limitation is hard coded into the function code? $\endgroup$ Mar 28, 2017 at 2:27
  • 1
    $\begingroup$ Yes, the cutoff is when the total number of bars is more than 100. $\endgroup$ Mar 28, 2017 at 3:08
  • 1
    $\begingroup$ 100 might seem like plenty but these days with large monitors the cut off seems a bit low. Any reason why this couldn't be controlled in the future by a system option? $\endgroup$ Mar 28, 2017 at 4:09

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