Well, im at it again with this project. I took quite a long break to make another project, and now have had the time to come back to this. I’ve finally written some in-depth docs, and will review them later today with a fresh mind to be sure that they’re as right as possible.
I also fixed a design flaw, but im not very sure if how i did it really fixed it. Before, this is the old way it’s doing it:

app.ui(|_, ui| {
    // put stuff inside some ui levels 
    egui::CentralPanel::default()
          .frame(egui::Frame::NONE)
          .show(ui, |ui| {
               // maybe make new ui levels
               // inside the levels, return TryExit
               TryExit::Force
      })
      .inner.inner.inner //as many .inner as ui levels 
      // TryExit is in, because you need to return the inner TryExit
})

this felt extremely clunky. So, i solved it like this:

// mutable reference to a TryExit
app.ui(|_, ui, exit: &mut TryExit| {
    // as many levels as you want
    egui::CentralPanel::default()
          .frame(egui::Frame::NONE)
          .show(ui, |ui| {
               // instead of returning it, mutate the passed-in reference
               *exit = TryExit::Force;
      }); // no need to return anything, so no .inner
})

this feels a bit better, but idrk still. For the time being, the API will be the latter.

Anyways, have a look at the new docs: