Struct Pair

pub struct Pair<T> {
    pub old: T,
    pub current: T,
}

A pair consisting of an old and a current value that can be used for tracking changes between them.

Fields

old: T

The old value.

current: T

The current value.

Implementations

impl<T> Pair<T>

pub fn check(&self, f: impl FnMut(&T) -> bool) -> bool

Checks if a condition is true for the current value but false for the old value.

pub fn map<U>(self, f: impl FnMut(T) -> U) -> Pair<U>

Maps the pair to a new pair with a different type.

impl<T: Eq> Pair<T>

pub fn changed(&self) -> bool

Checks if the value changed.

pub fn unchanged(&self) -> bool

Checks if the value did not change.

pub fn changed_to(&self, value: &T) -> bool

Checks if the value changed to a specific value that it was not before.

pub fn changed_from(&self, value: &T) -> bool

Checks if the value changed from a specific value that it is not now.

pub fn changed_from_to(&self, old: &T, current: &T) -> bool

Checks if the value changed from a specific value to another specific value.

impl<T: NoUninit> Pair<T>

pub fn bytes_changed(&self) -> bool

Checks if the bytes of the value changed.

pub fn bytes_unchanged(&self) -> bool

Checks if the bytes of the value did not change.

pub fn bytes_changed_to(&self, value: &T) -> bool

Checks if the bytes of the value changed to a specific value that it was not before.

pub fn bytes_changed_from(&self, value: &T) -> bool

Checks if the bytes of the value changed from a specific value that it is not now.

pub fn bytes_changed_from_to(&self, old: &T, current: &T) -> bool

Checks if the bytes of the value changed from a specific value to another specific value.

impl<T: PartialOrd> Pair<T>

pub fn increased(&self) -> bool

Checks if the value increased.

pub fn decreased(&self) -> bool

Checks if the value decreased.

Trait Implementations

impl<T: Clone> Clone for Pair<T>

fn clone(&self) -> Pair<T>

Returns a copy of the value.

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

Performs copy-assignment from source.

impl<T: Default> Default for Pair<T>

fn default() -> Pair<T>

Returns the “default value” for a type.

impl<T> Deref for Pair<T>

fn deref(&self) -> &Self::Target

Accesses the current value.

type Target = T

The resulting type after dereferencing.

impl<T: Clone + Widget> Widget for Pair<T>

type Args = <T as Widget>::Args

The arguments that are needed to register the widget.

fn register(key: &str, description: &str, args: Self::Args) -> Self

Registers the widget with the given key, description and default value. Returns the value that the user has set or the default value if the user did not set a value.

fn update_from(&mut self, settings_map: &Map, key: &str, args: Self::Args)

Updates the value of the setting based on the value that the user has set in the provided settings map.

impl<T: Copy> Copy for Pair<T>