Class: Sketchup::EntityObserver Abstract

Examples:

# use a Ruby module as a namespace to avoid conflicts
module Namespace
    # Define a new observer class
    class MyEntityObserver < Sketchup::EntityObserver
        def onChangeEntity(entity)
        end
        def onEraseEntity(entity)
        end
    end
end
# Create a reference to a new observer (if it needs to be removed later.)
my_ent_obs = MyEntityObserver.new
# Attach the observer to a Group
grp.add_observer(my_ent_obs)
# ...Later, remove the observer
grp.remove_observer(my_ent_observer)