Theme that follows the OS-level light / dark setting.

At call time theme/0 reads Mob.Theme.color_scheme/0 and returns Mob.Theme.Light.theme/0 or Mob.Theme.Dark.theme/0. Built for outdoor working users — sun-readable in daytime, eye-friendly at night.

Usage

defmodule MyApp do
  use Mob.App, theme: Mob.Theme.Adaptive
end

Reactive switching

Mob.Theme.AdaptiveWatcher (started by use Mob.App) calls Mob.Theme.set(Mob.Theme.Adaptive) again whenever the OS appearance flips, as long as the active theme was set from this module. Setting a fixed theme afterwards (another module, a struct, a keyword list) stops that until Mob.Theme.Adaptive is set again.

The renderer reads the active theme on each render, so a screen that is already showing repaints in the new theme on its next render; the watcher does not re-render screens itself.