RFC: Marker Cluster Refactor

[jpoehnelt]

Hi All,

I'm investigating a refactor of the marker clustering libraries for Google Maps! I have a prototype in progress and am looking for feedback.

Please take a look and comment on the simple design doc.

This would involve multiple breaking changes and the refactored library would be published to @googlemaps/markerclusterer.

1. encapsulation of algorithm and rendering into specific interfaces
2. enabling additional algorithms such as supercluster, [kmeans]https://www.npmjs.com/package/@turf/clusters-kmeans, etc
3. rendering cluster icons using google.maps.Marker instead of google.maps.OverlayView

See design doc for more information.

Issues addressed by:

• Overlaying markers over the cluster #270
• MarkerClusterer: Clusters appear above "use ctrl+scroll to zoom the map" #256
• Add keyboard event to cluster #184
• Pinch zoom not working on mobile #75
• Marker clusterer bug while dragging the map #10
• MarkerClusterer icon width / height is cutting the image #9

and probably many others documented or not

Feel free to comment here or in the design document.

[jpoehnelt]

https://github.com/googlemaps/js-markerclusterer has been published based upon the design doc above.