Strange behavior plotly hover

Question

I am getting a strange behavior with plotly hovers. When using geom_segment it works fine but with geom_rect it shows only one variable.

With geom_rect:

library(ggplot2)
library(plotly)

test <- data.frame(C1 = c(2, 3), C2 = c(3, 4), C3 = c(2, 3), C4 = c(1, 4), C5 = c('A', 'B'))
ggplotly( ggplot(data=test) + geom_rect(aes(xmin=C1, xmax=C2, ymin=C3, ymax=C4, fill=C5)))

Result:

With geom_segment:

ggplotly(ggplot(data=test) + geom_segment(aes(x=C1, xend=C2, y=C3, yend=C4, color=C5)))

Result:

I've tested with tooltip parameter without success (e.g. tooltip=c("C1", "C2", "C5")).

Possible solution: I can use a workaround adding the unofficial text aesthetic (e.g. text=paste("C1:", C1, "<br>", "C2:", C2, "<br>", "C5:", C5))

Is there a more standard solution?

Versions: 
plotly  4.5.2
ggplot2 2.1.0
R       3.3.2

Answer 1

I am no expert on plotly, but I have noticed this before. It appears that some parameters used for graphing will not show up automatically.

You can force them to appear by giving them a second name in aes:

library(ggplot2)
library(plotly)
test <- data.frame(C1 = c(2, 3), C2 = c(3, 4), C3 = c(2, 3), C4 = c(1, 4), C5 = c('A', 'B'))
ggplotly( ggplot(data=test, aes(a=C1, b=C2, c=C3, d=C4)) + geom_rect(aes(xmin=C1, xmax=C2, ymin=C3, ymax=C4, fill=C5)))