examples/scale_viridis_guide_legend_continuous_interactive.R

In davidgohel/ggiraph: Make 'ggplot2' Graphics Interactive

library(ggplot2)
library(ggiraph)

set.seed(4393)
dsmall <- diamonds[sample(nrow(diamonds), 1000),]
p <- ggplot(dsmall, aes(x, y)) +
  stat_density_2d(aes(
    fill = after_stat(nlevel),
    tooltip = paste("nlevel:", after_stat(nlevel))
  ),
  geom = "interactive_polygon") +
  facet_grid(. ~ cut)

# add interactive scale, by default the guide is a colourbar
p1 <- p + scale_fill_viridis_c_interactive(data_id = "nlevel",
                                           tooltip = "nlevel")
x <- girafe(ggobj = p1)
if (interactive()) print(x)

# make it legend
p2 <- p + scale_fill_viridis_c_interactive(data_id = "nlevel",
                                           tooltip = "nlevel",
                                           guide = "legend")
x <- girafe(ggobj = p2)
if (interactive()) print(x)

# set the keys separately
p3 <- p + scale_fill_viridis_c_interactive(
  data_id = function(breaks) {
    as.character(breaks)
  },
  tooltip = function(breaks) {
    as.character(breaks)
  },
  guide = "legend"
)
x <- girafe(ggobj = p3)
if (interactive()) print(x)


# make the title and labels interactive
p4 <- p + scale_fill_viridis_c_interactive(
  data_id = function(breaks) {
    as.character(breaks)
  },
  tooltip = function(breaks) {
    as.character(breaks)
  },
  guide = "legend",
  name = label_interactive("nlevel", data_id = "nlevel",
                           tooltip = "nlevel"),
  labels = function(breaks) {
    label_interactive(
      as.character(breaks),
      data_id = as.character(breaks),
      onclick = paste0("alert(\"", as.character(breaks), "\")"),
      tooltip = as.character(breaks)
    )
  }
)
x <- girafe(ggobj = p4)
x <- girafe_options(x,
                    opts_hover_key(girafe_css("stroke:red", text="stroke:none;fill:red")))
if (interactive()) print(x)