nih_plug_vizia: Timer and events

[polygon]

My Plugin is centered around a View struct that visualizes MIDI data in a custom draw function. Since the visualization is time dependent (Like a time-stepped simulation, I cannot just pass t_now into draw and recalculate everything), I need to regularly modify some values of the View which is where my troubles begin and I am looking for advice.

1. I can't do it in the draw function since it is &self not &mut self
2. I tried using add_timer and start_timer which is available in the build-context of View::build but this flat out does not work. The function passed to add_timer never gets called.
3. I could try to misuse a parameter and somehow update it from process, but the value I want to mutate are not parameters and should not show up in the DAW.
4. In the end, I used cx.spawn and made a small thread that emits messages back the component. This works, but feels like it's not the way this should be done.

Is there an idiomatic way to do this?