Tooltips disappear while using PlotHighlighting

Questions
1

If I use the PlotHighlighting option in a plot, I lose the ability to see Tooltips. Is the Tooltip function incompatible with the new functionality?

Try this code (with and without PlotHighlighting):

ListLinePlot[
 Tooltip[#, #] & /@ Table[{x, 2 Sin[x] + x + 0.}, {x, 0, 50, 1}], 
 PlotHighlighting -> "Crosshairs"]
2

I don’t know the official answer, but it seems like they might be incompatible, yes. However, you can recover the behavior by adding another highlighting option:

ListLinePlot[Table[{x, 2 Sin[x] + x + 0.}, {x, 0, 50, 1}], PlotHighlighting -> {"Crosshairs", "XYLabel"}]
3

Yes, that is a workaround. I do find the ability to custom format the label with Tooltip very helpful especially with dates on the x-axis (the system defaults can be too granular).

Hopefully, the PlotHighlighting options will be improved in the next release.

4

Usually having PlotHighlighting and Tooltips at the same time is frustrating since they’re both reacting to the mouse, trying to put their popups in the same place, etc…

As a result, PlotHighlighting → Automatic turns off the highlighting if there are tooltips, callouts, etc…

Giving a specific setting for PlotHighlighting will turn it on.

5

Is there any way to have a custom label generator? This seems to sometimes work better, but can be temperamental.

ListLinePlot[Table[{x, 2 Sin[x] + x}, {x, 0, 50, 1}], 
 LabelingFunction -> (Placed[#1[[1]], Tooltip] &), 
 PlotHighlighting -> "Crosshairs"]
ListLinePlot[Table[{x, 2 Sin[x] + x}, {x, 0, 50, 1}], Mesh -> All, 
 LabelingFunction -> (Placed[#1[[1]], Tooltip] &), 
 PlotHighlighting -> "XYDroplines"]