Sorry for the late response.
1. You can get information on selection by listenig to "add" event on
You can retrieve the cluster selected and the features in the cluster.
2. To select a feature programmatically just add it to the selection as
If you want to select and spread out a cluster see
You received this message because you are subscribed to the Google Groups "OL3
To unsubscribe from this group and stop receiving emails from it, send an email
To post to this group, send email to firstname.lastname@example.org.
Visit this group at https://groups.google.com/group/ol3-dev.
To view this discussion on the web visit
For more options, visit https://groups.google.com/d/optout.