Introduce a new Operation<T> enum for widgets with from_get_set about egui HOT 2 OPEN

I have no idea what you are referring to. Please explain, perhaps referring to existing code and/or adding some code example.

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Sorry, I should've clarified. What I'm referring to is the from_get_set method that sliders and drag values have:

docs.rs

Doing a quick search, I realized that expanding this to other widgets may also be a good idea. The main thing this benefits is audio plugins. When you're doing the editor UI, you don't have a direct mutable reference you can use. Here's an example from nih_plug:

ui.add(
    egui::widgets::Slider::from_get_set(-30.0..=30.0, |new_value| {
        match new_value {
            Some(new_value_db) => {
                let new_value = util::gain_to_db(new_value_db as f32);

                setter.begin_set_parameter(&params.gain);
                setter.set_parameter(&params.gain, new_value);
                setter.end_set_parameter(&params.gain);

                new_value_db
            }
            None => util::gain_to_db(params.gain.value()) as f64,
        }
    })
    .suffix(" dB"),
);

When reading this for the first time, the Option in the closure doesn't immediately make sense.

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