feat: update the cpu graph async

Cargo.lock

@@ -139,6 +139,17 @@ dependencies = [
  "slab",
 ]
 
+[[package]]
+name = "async-fs"
+version = "2.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8034a681df4aed8b8edbd7fbe472401ecf009251c8b40556b304567052e294c5"
+dependencies = [
+ "async-lock",
+ "blocking",
+ "futures-lite",
+]
+
 [[package]]
 name = "async-io"
 version = "2.6.0"
@@ -168,6 +179,17 @@ dependencies = [
  "pin-project-lite",
 ]
 
+[[package]]
+name = "async-net"
+version = "2.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b948000fad4873c1c9339d60f2623323a0cfd3816e5181033c6a5cb68b2accf7"
+dependencies = [
+ "async-io",
+ "blocking",
+ "futures-lite",
+]
+
 [[package]]
 name = "async-process"
 version = "2.5.0"
@@ -1211,6 +1233,7 @@ dependencies = [
  "iced_core",
  "log",
  "rustc-hash 2.1.3",
+ "smol",
  "wasm-bindgen-futures",
  "wasmtimer",
 ]
@@ -1357,6 +1380,7 @@ name = "itop"
 version = "0.1.0"
 dependencies = [
  "iced",
+ "smol",
  "sysinfo",
 ]
 
@@ -2740,6 +2764,23 @@ dependencies = [
  "wayland-backend",
 ]
 
+[[package]]
+name = "smol"
+version = "2.0.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a33bd3e260892199c3ccfc487c88b2da2265080acb316cd920da72fdfd7c599f"
+dependencies = [
+ "async-channel",
+ "async-executor",
+ "async-fs",
+ "async-io",
+ "async-lock",
+ "async-net",
+ "async-process",
+ "blocking",
+ "futures-lite",
+]
+
 [[package]]
 name = "smol_str"
 version = "0.2.2"

Cargo.toml

@@ -5,8 +5,9 @@ edition = "2024"
 license = "AGPL-3.0-or-later"
 
 [dependencies]
+smol = "2.0.2"
 sysinfo = "0.39.6"
 
 [dependencies.iced]
 version = "0.14.0"
-features = [ "canvas" ]
+features = [ "canvas", "smol" ]

src/app/mod.rs

@@ -1,48 +1,51 @@
-use std::time::Instant;
-
 use iced::{
-    Color, Element, Length, Renderer, Subscription, Task, Theme, application, theme, widget, window,
+    Color, Element, Length, Renderer, Task, Theme, application, futures::SinkExt, stream::channel,
+    theme, widget,
 };
+use smol::Timer;
 
 use crate::app::cpu_graph::CpuGraph;
 
 mod cpu_graph;
 
 enum Message {
-    Frame(Instant),
+    Cpu(f32),
 }
 
 struct State {
-    sys: sysinfo::System,
-    refreshes: sysinfo::RefreshKind,
-
-    last_refresh: Instant,
-
     cpu_graph: CpuGraph,
 }
 
 impl State {
-    fn new() -> Self {
+    fn new() -> (Self, Task<Message>) {
+        (
             Self {
-            sys: sysinfo::System::new(),
-            refreshes: sysinfo::RefreshKind::nothing()
-                .with_cpu(sysinfo::CpuRefreshKind::nothing().with_cpu_usage()),
-
                 cpu_graph: Default::default(),
-            last_refresh: Instant::now(),
+            },
+            Task::run(
+                channel(1, async |mut sender| {
+                    let mut sys = sysinfo::System::new();
+                    let refreshes = sysinfo::RefreshKind::nothing()
+                        .with_cpu(sysinfo::CpuRefreshKind::nothing().with_cpu_usage());
+
+                    sys.refresh_specifics(refreshes);
+                    Timer::after(sysinfo::MINIMUM_CPU_UPDATE_INTERVAL).await;
+
+                    loop {
+                        sys.refresh_specifics(refreshes);
+                        Timer::after(sysinfo::MINIMUM_CPU_UPDATE_INTERVAL).await;
+                        sender.send(sys.global_cpu_usage()).await.unwrap();
                     }
+                }),
+                Message::Cpu,
+            ),
+        )
     }
     fn update(&mut self, message: Message) -> Task<Message> {
         match message {
-            Message::Frame(instant) => {
+            Message::Cpu(value) => {
-                if instant.duration_since(self.last_refresh) >= sysinfo::MINIMUM_CPU_UPDATE_INTERVAL
+                self.cpu_graph.update(value);
-                {
-                    self.sys.refresh_specifics(self.refreshes);
-                    self.cpu_graph.update(self.sys.global_cpu_usage());
                 self.cpu_graph.cache.clear();
-
-                    self.last_refresh = instant;
-                }
             }
         }
 
@@ -54,15 +57,10 @@ impl State {
             .height(Length::Fill)
             .into()
     }
-
-    fn subscription(&self) -> Subscription<Message> {
-        window::frames().map(Message::Frame)
-    }
 }
 
 pub fn run() -> Result<(), impl std::error::Error> {
     application(State::new, State::update, State::view)
-        .subscription(State::subscription)
         .theme(theme::Theme::custom(
             "high-contrast-dark",
             theme::Palette {