ggplotly tooltip shows transformed (instead of original) value

[kojisposts]

If I make a graphic with logarithmic colour scaling, the tooltip only shows the logged value, rather than the original value that is more meaningful in the context

.

It's similar to #804 , which dealt with transformed axes.

[cpsievert]

A minimal reproducible example would be much appreciated

[kojisposts]

Here's an example:

library(plotly)
english_french <- read.csv("https://raw.githubusercontent.com/plotly/datasets/master/english_french.csv",
                           stringsAsFactors = FALSE)
p <- ggplot(english_french, aes(x=engperc,y=frenperc, weight=total)) + 
  geom_bin2d() +
  scale_fill_gradient(low="lightblue1",high="darkblue",trans="log10") +
  labs(title = "Distribution of the Canadian population by English and French fluency",
       x = "% fluent in English",
       y = "% fluent in French",
       fill = "# of people")
ggplotly(p)