44 lines
938 B
Rust
44 lines
938 B
Rust
use {
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crate::utils::{clonecell::CloneCell, syncqueue::SyncQueue},
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std::{
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fmt::{Debug, Formatter},
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rc::Rc,
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},
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};
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pub struct OnChange<T> {
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pub on_change: CloneCell<Option<Rc<dyn Fn()>>>,
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pub events: SyncQueue<T>,
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}
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impl<T> OnChange<T> {
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pub fn clear(&self) {
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self.on_change.take();
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self.events.take();
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}
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pub fn send_event(&self, event: T) {
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self.events.push(event);
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if let Some(cb) = self.on_change.get() {
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cb();
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}
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}
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}
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impl<T> Default for OnChange<T> {
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fn default() -> Self {
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Self {
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on_change: Default::default(),
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events: Default::default(),
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}
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}
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}
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impl<T> Debug for OnChange<T> {
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fn fmt(&self, f: &mut Formatter<'_>) -> std::fmt::Result {
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match self.on_change.get() {
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None => f.write_str("None"),
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Some(_) => f.write_str("Some"),
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}
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}
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}
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