Struct drying_paint::WatchedCore

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pub struct WatchedCore<'ctx, T: ?Sized, O: ?Sized = DefaultOwner> { /* private fields */ }

Expand description

This represents some value which will be interesting to watch. Watcher functions that reference this value will be re-run when this value changes.

Implementations

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impl<'ctx, T, O: ?Sized> WatchedCore<'ctx, T, O>

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pub fn new(value: T) -> Self

Create a new watched value.

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pub fn into_inner(self) -> T

Consumes the WatchedCore, returning the wrapped value

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pub fn replace(&mut self, value: T, ctx: WatchArg<'_, 'ctx, O>) -> T

Takes the wrapped value, with a new one, returning the old value, without deinitializing either one, and notifies watchers that the value has changed.

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impl<'ctx, T: ?Sized, O: ?Sized> WatchedCore<'ctx, T, O>

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pub fn get(&self, ctx: WatchArg<'_, 'ctx, O>) -> &T

Get a referenced to the wrapped value, binding a watch closure.

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pub fn get_mut(&mut self, ctx: WatchArg<'_, 'ctx, O>) -> &mut T

Get a mutable referenced to the wrapped value, notifying watchers that the value has changed.

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pub fn get_mut_external(&mut self) -> &mut T

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pub fn get_unwatched(&self) -> &T

Get a referenced to the wrapped value, without binding any watch closure.

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pub fn take(&mut self, ctx: WatchArg<'_, 'ctx, O>) -> T

Takes the wrapped value, leaving Default::default() in its place, and notifies watchers that the value has changed.

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impl<'ctx, T: PartialEq, O: ?Sized> WatchedCore<'ctx, T, O>

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pub fn set_if_neq(&mut self, value: T, ctx: WatchArg<'_, 'ctx, O>)

This function provides a way to set a value for a watched value only if is has changed. This is useful for cases where setting a value would otherwise cause an infinite loop.

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impl<T: PartialEq> WatchedCore<'static, T, DefaultOwner>

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pub fn set_if_neq_auto(&mut self, value: T)

This function provides a way to set a value for a watched value only if is has changed. This is useful for cases where setting a value would otherwise cause an infinite loop.