Struct SystemUiWatcher 

pub struct SystemUiWatcher { /* private fields */ }

Per-shell-instance watcher over the process-wide system-UI slot: each shell owns one, polling it once per frame (mirroring crate::theme_override::ThemeOverrideWatcher) to detect a set_system_ui_mode call since the last poll.

Implementations

impl SystemUiWatcher

pub fn new() -> Self

A fresh watcher, matching the slot’s initial (never-requested) state.

pub fn poll(&mut self) -> Option<SystemUiMode>

Poll the slot once. Returns:

• None — no set_system_ui_mode call since the last poll (or since construction); the shell does nothing.
• Some(mode) — a new mode to apply.

Trait Implementations

impl Debug for SystemUiWatcher

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for SystemUiWatcher

fn default() -> Self

Returns the “default value” for a type.