EventObject is the base class for all objects in iMSTK that can receive and emit events. It supports direct and queued observer functions. Direct observers receive events immediately on the same thread This can either be posted on an object or be a function pointer Queued observers receive events within their queue which they can process whenever they like. These can be connected with the connect/queuedConnect/disconnect functions Lambda recievers cannot be disconnected unless all receivers to a signal are removed.