egui-mobius && egui-citizen

Key vocabulary

Three terms appear throughout this book. Fix them in your head now — every chapter that follows leans on these:

• Dynamic<T> — the reactive primitive that citizen-panels and atoms both sit on top of. A thread-safe, observable cell that any number of handles can point at. Writes through any handle are visible through every other handle. Covered in depth below. There is also a correspondent Derived<T> from egui_mobius_reactive that can automatically produce side effects.
• citizen-panel — a dock panel that carries a persistent identity (CitizenId) and reactive lifecycle state (CitizenState), wired into a central Dispatcher. The citizen-panel is the unit of organization in an egui_citizen app.
• atom — a single widget inside a citizen-panel: a slider, a button, a text field, a checkbox. Atoms are where user input originates. They fire events on their citizen-panel's behalf and often hold their own reactive state that other panels or backend threads read. See the coupling chapter for how an atom can wire into panel-to-panel state sharing, panel-to-backend messaging, or both at once.