Crate win_nightlight_watch 

Observe Night Light changes and read decoded snapshots.

Create one Watcher for settings and one for state as needed. Read each initial snapshot with Watcher::read_current after constructing it. Successful notification consumption rearms before reading. Snapshots reflect the later read, and notifications can combine writes or produce duplicates.

The watcher does not start a thread or write registry values. This crate supports Windows only. Fallible operations return an Error; public operations do not panic.

Example

use std::time::Duration;
use win_nightlight_watch::Snapshot;
use win_nightlight_watch::Watcher;

fn observe(mut changed: impl FnMut(Snapshot)) -> Result<(), Box<dyn std::error::Error>> {
    let watcher = Watcher::settings()?;
    changed(watcher.read_current()?);

    loop {
        if let Some(snapshot) = watcher.wait_timeout(Duration::from_secs(60))? {
            changed(snapshot);
        }
    }
}

Structs

Error

Report a watcher failure and preserve its underlying error.

Watcher

Observe one Night Light record without a background thread.

Enums

ErrorKind

Classify a watcher failure.

Snapshot

Store a decoded observation of one Night Light registry value.

Type Aliases

Result

Result of a registry watcher operation.