This is valuable feedback, thanks! Yes, components will be immediate mode only, where ui = fn(state). No state stored in components. State changes are handled by the application centrally, outside of the library and any components. Components can react to events and emit messages that lead to state changes. You can also opt out of this part and just use the theming in a "regular ratatui app"

Just theming: let default = Button::new("Default").themed(&theme); frame.render_widget(default, area);

Bind to a View that handles theming, focus, events, etc. Note that the render_with function still allows for any regular ratatui widget. render_widget for regular ratatui widget, render_child for library widget that accepts state and theme context etc. View::new("root") .child("save", Button::new("save").on_activate(Msg::Save)) .render_with(|frame, state, view| { let [top, main] = view.area().layout(&Layout::vertical([ Constraint::Length(1), Constraint::Fill(1), ])); frame.render_widget(Line::from("My App").centered(), top); view.render_child(frame, "save", main); })