Products Google for Education Blockly Reference Blockly Framework Reference EventManagerListener public protocol EventManagerListener: class Protocol for listening to when events are fired by EventManager. eventManager(_:didFireEvent:) Method that is executed when an event manager fires an event. Declaration Swift func eventManager(_ eventManager: EventManager, didFireEvent event: BlocklyEvent) Except as otherwise noted, the content of this page is licensed under the Creative Commons Attribution 4.0 License, and code samples are licensed under the Apache 2.0 License. For details, see our Site Policies. Java is a registered trademark of Oracle and/or its affiliates. Last updated December 1, 2017.