Struct Watcher 

pub struct Watcher { /* private fields */ }

A handle to a background theme-change watcher.

Dropping the Watcher stops the underlying platform watcher and joins its background thread (where applicable).

Only mode transitions are emitted: if the OS reports the same mode twice in a row, no duplicate message is sent.

Implementations

impl Watcher

pub fn recv(&self) -> Result<Mode, RecvError>

Blocks until the next theme change is received.

pub fn try_recv(&self) -> Result<Mode, TryRecvError>

Returns the next theme change if one is already available, without blocking.

pub fn iter(&self) -> Iter<'_, Mode>

Returns a blocking iterator over theme changes.

pub fn try_iter(&self) -> TryIter<'_, Mode>

Returns a non-blocking iterator that yields only already-available theme changes.