module Sketchup # Attached to an {Entity} using the {Entity#add_observer} method # @abstract # This is an abstract class - you need to over-write # the methods in your code. # # @example # # 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) # # class EntityObserver # @param [Entity] entity # @return [nil] def onChangeEntity(entity) end # @param [Entity] entity # @return [nil] def onEraseEntity(entity) end end end