[FeatureRequest] Support for AdvancedMarkerElement

[avsdev-cw]

Feature request to add support for the newer AdvancedMarkerElement which includes much more customisation of markers, including changing the glyph only etc.

---

• colours
  • border
  • background
  • glyph
  • handle migration from "red","blue","lavendar","green" to hex
  • scale
• click-events
• info-window
• clustering
  • cluster options
• remove marker
• remove all markers (in a layer)
• draggable event listener
• mouseOver
• mouseOverGroup
• InfoWindow
• Chart InfoWindow
• close_info_window

This requires the v=beta release of the API (for marker.addEventListener())

[dcooley]

I will be adding this as part of #256

[dcooley]

Latest progress is available on the 3.0.0 branch. You can now cusotmise colours:

df <- tram_stops
df$scale <- sample(1:5, size = nrow(df), replace = TRUE)
google_map(
  key = map_key
  , data = df
  ) %>%
 add_markers(
   lat = "stop_lat"
   , lon = "stop_lon"
   , colour = "#0000FF"        ## Blue
   , glyph_colour = "#00FF00"  ## Green
   , border_colour = "#000000" ## Black
   , scale = "scale"
   )