How to use a MessagePump?

[hydrargyrum]

I'm developing an app with a DataTable and would like to add a Model class doing some business logic. This Model class should post events that would be handled by the DataTable view.
My Model is a direct subclass of MessagePump but it seems none of the posted messages are received by the view. The Model is_attached is False and so is is_running. What could be wrong?

[davep]

Something worth mentioning right off I guess, but you wouldn't ordinarily inherit from MessagePump; if you want something that's going to be a source of messages that other widgets within the DOM can catch, you'd inherit from at least Widget; or you could have other code posting messages at the target widget.

With that out of the way, and if that doesn't clarify things already, perhaps you could provide a MRE of wha you're attempting to do.

It might also be worth reviewing the guide to events and messages.