plotly: legends are truncated when orientation = "h" and margin = list ( l = anyNumber)

[ehb022]

Legends are truncated when using orientation = "h" and setting any value for the left margin. This is the only instance where this has occured, and it's a bit of a problem when we want to adjust the left margin. I'm guessing it's a bug?

Example:

# loading dplyr
library(dplyr)
# some data. create factor variable with longer names (Diet)
ChickWeight2 <- ChickWeight %>% 
  ungroup() %>% 
  mutate(Diet = factor (Diet,labels =c("diet 1","diet 2", "diet 3", "diet 4" ))) %>%
  mutate(Time = as.Date(Time, origin = "2010-11-21")) %>% 
  group_by(Time , Diet) %>% 
  summarise(weight = mean(weight)) 


# No problems here, when we don't set any value for the left margin.
plotly::plot_ly(ChickWeight2, x = ~Time, y = ~weight, color = ~Diet,
                type ="scatter",
                mode="line",
                colors = c("red","blue","green", "orange")) %>% 
  plotly::layout(legend = list (orientation="h"),
                 xaxis = list (title=FALSE)  ,
                 margin=list())
                
# Now with left margin, all legends are sometimes in one row (as in this example), and "diet 4" is truncated
plotly::plot_ly(ChickWeight2, x = ~Time, y = ~weight, color = ~Diet,
                type ="scatter",
                mode="line",
                colors = c("red","blue","green", "orange")) %>% 
  plotly::layout(legend = list (orientation = "h"),
                 xaxis = list (title = FALSE)  ,
                 margin=list(l = 0))

Nice plot (first example):

Not nice plot (2nd example):

[cpsievert]

I think this problem was fixed in plotly.js