This is my 10th attempt to create a reusable, useful, event library for QuickApps. My last attempt, Please login or register to see this link. , was ok but the model, modelled after RefreshStatesSubscriber, was not optimal for more advanced functionality. This new model provides most of the functionality needed, with a reasonable syntax - I'm feeling pretty comfortable that this is it.   The functionality is provided as a QuickApp file that is included in your QuickApp project. T