Enum SystemTheme 

#[non_exhaustive]
pub enum SystemTheme {
    Light,
    Dark,
}

The system’s light/dark color-scheme preference, as reported by the windowing/browser layer.

Currently just these two variants: every source that can report this (winit’s Theme, the browser’s prefers-color-scheme media query) only ever resolves to one of exactly these two, and a backend that can’t determine a preference simply never emits Event::ThemeChanged rather than emitting a third “unknown” case for callers to handle. Marked #[non_exhaustive] for consistency with sibling public enums, in case a future source (e.g. a HighContrast case) needs to be added.

Variants (Non-exhaustive)

Non-exhaustive enums could have additional variants added in future. Therefore, when matching against variants of non-exhaustive enums, an extra wildcard arm must be added to account for any future variants.

Light

The system prefers a light color scheme.

Dark

The system prefers a dark color scheme.

Trait Implementations

impl Clone for SystemTheme

fn clone(&self) -> SystemTheme

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for SystemTheme

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

Formats the value using the given formatter.

impl Hash for SystemTheme

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl PartialEq for SystemTheme

fn eq(&self, other: &SystemTheme) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Copy for SystemTheme

impl Eq for SystemTheme

impl StructuralPartialEq for SystemTheme