Adding layers makes tooltips disappear

Hi there,

I'm experiencing the same issue as @borenstein, referenced here: Adding layer makes tool tips disappear. Someone asked @borenstein to post the issue here but I didn't see a record of it. Here's a shorter reproducible example and summary; please note their solution (comparing data on hover) doesn't work in my use case (not shown here).

I want to create a plot where users can hover over a map and a tooltip for a single layer appears, for example, showing the names of US counties, with state boundaries overlaid on the map. If your mouse is "far" from a state boundary, the tooltip appears. However, if you are "close" (e.g., southeastern edge of map), the tooltip does not appear.

I've tried identifying the traces that contain parts of my plot that I don't want to show tooltips for - as in these stack overflow posts:

• ggplotly - only return tooltip hover text on certain geom objects

• Disable hover information for a specific layer (geom) of plotly

But, it doesn't work.

library(plotly)
library(tidyverse)

### New England: *sometimes* shows tool tips
new_england <- c("maine", "new hampshire", "vermont", "massachusetts", "connecticut", "rhode island")

b <- ggplot2::map_data("state") %>%
  filter(region %in% new_england)

a <- data.frame(group = seq(3085), val = rnorm(3085)) %>%
  left_join(ggplot2::map_data("county"), by = "group") %>%
  filter(region %in% new_england)

p <- ggplot(a, aes(long, lat, group = group)) +
  geom_polygon(aes(fill = val, text = subregion)) +
  geom_path(data = b, color = "black")

ggplotly(p, tooltip="text")

Tagging @MountainCedar so they know I've filed an issue about this.

Commencez par exécuter l’exemple reproductible ggplotly fourni et comparez le comportement des tooltips à proximité et à distance de la frontière de l’État. Suivez la manière dont les traces de polygones et de chemins superposées gèrent la sélection des tooltips ; le travail est considéré comme terminé lorsque les tooltips contenant les noms des comtés restent disponibles près des frontières sans nécessiter le workaround proposé. Aucun fichier ni test n’est mentionné dans l’issue ; localiser le code de hover pertinent et ajouter une couverture de régression nécessitera donc une bonne connaissance du projet.