Customizing the Tooltip / Adding to the Data object

[elbamos]

I'd like to customize the tooltip shown when a user hovers over a scatterplot point. To do this, I need to pull data out of the data object passed to format.contents. However, not all of the fields from my data.frame are getting into data. How can I add fields to data, or otherwise get the other columns from the data.frame into the right place?

Here is an example that should illustrate what I mean:

data.frame(
  x = rnorm(200), 
  y = rnorm(200), 
  group = sample(letters[1:3], size=200, replace=T), 
  label = sample(letters[4:26], size=200, replace=T) 
) %>%
  billboarder(data=.) %>%
  bb_aes(x = x, y = y, group=group, label=label) %>%
  bb_scatterplot() %>%
  bb_tooltip(grouped=FALSE, 
             contents = htmlwidgets::JS(
               "function(data, titleFormat, valueFormat, color) {console.log(data);return `<table><tr><td>${data[0].label}</td></tr><tr><td>${data[0].x}</td></tr><tr><td>${data[0].value}</td></tr></table>`;}"
             ))

As of now, the labels are all undefined, because data has group for both the id and name fields.

[Victor Perrier]

That's complicated... the additional data are not kept, it is not possible to refer to label. A solution will be to pass a custom JSON in the contents function and retrieve data by index and group. I'll investigate.