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fix: make rectangle_tracker subscription only return update if there is some

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This commit is contained in:
Ashley Wulber 2023-05-15 14:22:07 -04:00
parent d38b68244a
commit f433b3dc20
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GPG key ID: 5216D4F46A90A820
1 changed files with 41 additions and 34 deletions
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25
src/widget/rectangle_tracker/subscription.rs
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@ -14,7 +14,7 @@ pub fn rectangle_tracker_subscription<
R: 'static + Hash + Copy + Send + Sync + Debug + Eq,
>(
id: I,
) -> iced::Subscription<Option<(I, RectangleUpdate<R>)>> {
) -> iced::Subscription<(I, RectangleUpdate<R>)> {
subscription::unfold(id, State::Ready, move |state| start_listening(id, state))
}
@ -26,9 +26,10 @@ pub enum State<I> {
async fn start_listening<I: Copy, R: 'static + Hash + Copy + Send + Sync + Debug + Eq>(
id: I,
state: State<R>,
) -> (Option<(I, RectangleUpdate<R>)>, State<R>) {
match state {
mut state: State<R>,
) -> ((I, RectangleUpdate<R>), State<R>) {
loop {
let (update, new_state) = match state {
State::Ready => {
let (tx, rx) = unbounded();
@ -47,23 +48,29 @@ async fn start_listening<I: Copy, R: 'static + Hash + Copy + Send + Sync + Debug
|| (prev.y - new.y).abs() > 0.1
{
map.insert(u.0, new);
return (
(
Some((id, RectangleUpdate::Rectangle(u))),
State::Waiting(rx, map),
);
)
} else {
(None, State::Waiting(rx, map))
}
} else {
map.insert(u.0, u.1);
return (
(
Some((id, RectangleUpdate::Rectangle(u))),
State::Waiting(rx, map),
);
)
}
(None, State::Waiting(rx, map))
}
None => (None, State::Finished),
},
State::Finished => iced::futures::future::pending().await,
};
state = new_state;
if let Some(u) = update {
return (u, state);
}
}
}