feat: basic cpu graph

Cargo.lock

@@ -770,6 +770,12 @@ version = "0.1.9"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "5baebc0774151f905a1a2cc41989300b1e6fbb29aff0ceffa1064fdd3088d582"
 
+[[package]]
+name = "float_next_after"
+version = "1.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8bf7cc16383c4b8d58b9905a8509f02926ce3058053c056376248d958c9df1e8"
+
 [[package]]
 name = "foldhash"
 version = "0.1.5"
@@ -1166,13 +1172,6 @@ dependencies = [
  "thiserror 2.0.19",
 ]
 
-[[package]]
-name = "iced-template"
-version = "0.1.0"
-dependencies = [
- "iced",
-]
-
 [[package]]
 name = "iced_core"
 version = "0.14.0"
@@ -1229,6 +1228,7 @@ dependencies = [
  "iced_core",
  "iced_futures",
  "log",
+ "lyon_path",
  "raw-window-handle",
  "rustc-hash 2.1.3",
  "thiserror 2.0.19",
@@ -1303,6 +1303,7 @@ dependencies = [
  "iced_debug",
  "iced_graphics",
  "log",
+ "lyon",
  "rustc-hash 2.1.3",
  "thiserror 2.0.19",
  "wgpu",
@@ -1351,6 +1352,14 @@ dependencies = [
  "hashbrown 0.17.1",
 ]
 
+[[package]]
+name = "itop"
+version = "0.1.0"
+dependencies = [
+ "iced",
+ "sysinfo",
+]
+
 [[package]]
 name = "jni"
 version = "0.22.4"
@@ -1545,6 +1554,58 @@ version = "0.16.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "7f66e8d5d03f609abc3a39e6f08e4164ebf1447a732906d39eb9b99b7919ef39"
 
+[[package]]
+name = "lyon"
+version = "1.0.19"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "bd0578bdecb7d6d88987b8b2b1e3a4e2f81df9d0ece1078623324a567904e7b7"
+dependencies = [
+ "lyon_algorithms",
+ "lyon_tessellation",
+]
+
+[[package]]
+name = "lyon_algorithms"
+version = "1.0.20"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8575c0d003ae459399623c4def180c63b77f343b1a7fee64f249b349e7699a31"
+dependencies = [
+ "lyon_path",
+ "num-traits",
+]
+
+[[package]]
+name = "lyon_geom"
+version = "1.0.19"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4336502e29e32af93cf2dad2214ed6003c17ceb5bd499df77b1de663b9042b92"
+dependencies = [
+ "arrayvec",
+ "euclid",
+ "num-traits",
+]
+
+[[package]]
+name = "lyon_path"
+version = "1.0.19"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5c463f9c428b7fc5ec885dcd39ce4aa61e29111d0e33483f6f98c74e89d8621e"
+dependencies = [
+ "lyon_geom",
+ "num-traits",
+]
+
+[[package]]
+name = "lyon_tessellation"
+version = "1.0.20"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8e43b7e44161571868f5c931d12583592c223c5583eef86b08aa02b7048a3552"
+dependencies = [
+ "float_next_after",
+ "lyon_path",
+ "num-traits",
+]
+
 [[package]]
 name = "malloc_buf"
 version = "0.0.6"
@@ -1674,6 +1735,15 @@ dependencies = [
  "jni-sys 0.3.1",
 ]
 
+[[package]]
+name = "ntapi"
+version = "0.4.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c3b335231dfd352ffb0f8017f3b6027a4917f7df785ea2143d8af2adc66980ae"
+dependencies = [
+ "winapi",
+]
+
 [[package]]
 name = "num-traits"
 version = "0.2.19"
@@ -1950,6 +2020,16 @@ dependencies = [
  "objc2-core-foundation",
 ]
 
+[[package]]
+name = "objc2-io-kit"
+version = "0.3.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "33fafba39597d6dc1fb709123dfa8289d39406734be322956a69f0931c73bb15"
+dependencies = [
+ "libc",
+ "objc2-core-foundation",
+]
+
 [[package]]
 name = "objc2-io-surface"
 version = "0.3.2"
@@ -1985,6 +2065,17 @@ dependencies = [
  "objc2-foundation 0.2.2",
 ]
 
+[[package]]
+name = "objc2-open-directory"
+version = "0.3.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "bb82bed227edf5201dfedf072bba4015a33d3d4a98519837295a90f0a23f676d"
+dependencies = [
+ "objc2 0.6.4",
+ "objc2-core-foundation",
+ "objc2-foundation 0.3.2",
+]
+
 [[package]]
 name = "objc2-quartz-core"
 version = "0.2.2"
@@ -2758,6 +2849,21 @@ dependencies = [
  "libc",
 ]
 
+[[package]]
+name = "sysinfo"
+version = "0.39.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d2071df9448915b71c4fe6d25deaf1c22f12bd234f01540b77312bb8e41361e6"
+dependencies = [
+ "libc",
+ "memchr",
+ "ntapi",
+ "objc2-core-foundation",
+ "objc2-io-kit",
+ "objc2-open-directory",
+ "windows 0.62.2",
+]
+
 [[package]]
 name = "tempfile"
 version = "3.27.0"
@@ -3402,6 +3508,22 @@ dependencies = [
  "web-sys",
 ]
 
+[[package]]
+name = "winapi"
+version = "0.3.9"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5c839a674fcd7a98952e593242ea400abe93992746761e38641405d28b00f419"
+dependencies = [
+ "winapi-i686-pc-windows-gnu",
+ "winapi-x86_64-pc-windows-gnu",
+]
+
+[[package]]
+name = "winapi-i686-pc-windows-gnu"
+version = "0.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ac3b87c63620426dd9b991e5ce0329eff545bccbbb34f3be09ff6fb6ab51b7b6"
+
 [[package]]
 name = "winapi-util"
 version = "0.1.11"
@@ -3411,6 +3533,12 @@ dependencies = [
  "windows-sys 0.61.2",
 ]
 
+[[package]]
+name = "winapi-x86_64-pc-windows-gnu"
+version = "0.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "712e227841d057c1ee1cd2fb22fa7e5a5461ae8e48fa2ca79ec42cfc1931183f"
+
 [[package]]
 name = "window_clipboard"
 version = "0.5.1"

Cargo.toml

@@ -1,10 +1,12 @@
 [package]
-name = "iced-template"
+name = "itop"
 version = "0.1.0"
 edition = "2024"
 license = "AGPL-3.0-or-later"
 
 [dependencies]
+sysinfo = "0.39.6"
 
 [dependencies.iced]
 version = "0.14.0"
+features = [ "canvas" ]

src/app/cpu_graph.rs

@@ -0,0 +1,49 @@
+use std::collections::VecDeque;
+
+use iced::{Color, Point, Renderer, Theme, mouse, widget::canvas};
+
+use crate::app;
+
+const CYAN: Color = Color::from_rgb8(0, 255, 255);
+
+#[derive(Default)]
+pub struct CpuGraph {
+    pub cache: canvas::Cache,
+    timeline: VecDeque<f32>,
+}
+
+impl CpuGraph {
+    pub fn update(&mut self, usage: f32) {
+        self.timeline.push_back(usage);
+        if self.timeline.len() > 1000 {
+            self.timeline.pop_front();
+        }
+    }
+}
+
+impl canvas::Program<app::Message, Theme, Renderer> for CpuGraph {
+    type State = ();
+    fn draw(
+        &self,
+        _state: &Self::State,
+        renderer: &Renderer,
+        _theme: &Theme,
+        bounds: iced::Rectangle,
+        _cursor: mouse::Cursor,
+    ) -> Vec<canvas::Geometry<Renderer>> {
+        let geometry = self.cache.draw_with_bounds(renderer, bounds, |frame| {
+            frame.stroke(
+                &canvas::Path::new(|builder| {
+                    for (index, value) in self.timeline.iter().enumerate() {
+                        let x = index as f32 / self.timeline.len() as f32 * bounds.width;
+                        let y = bounds.height - value / 100. * bounds.height;
+                        builder.line_to(Point { x, y })
+                    }
+                }),
+                canvas::Stroke::default().with_color(CYAN),
+            );
+        });
+
+        vec![geometry]
+    }
+}

src/app/mod.rs

@@ -1,23 +1,68 @@
-use iced::{Color, Element, Renderer, Task, Theme, application, theme, widget};
+use std::time::Instant;
 
-enum Message {}
+use iced::{
+    Color, Element, Length, Renderer, Subscription, Task, Theme, application, theme, widget, window,
+};
 
-struct State {}
+use crate::app::cpu_graph::CpuGraph;
+
+mod cpu_graph;
+
+enum Message {
+    Frame(Instant),
+}
+
+struct State {
+    sys: sysinfo::System,
+    refreshes: sysinfo::RefreshKind,
+
+    last_refresh: Instant,
+
+    cpu_graph: CpuGraph,
+}
 
 impl State {
     fn new() -> Self {
-        Self {}
+        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(),
+        }
     }
     fn update(&mut self, message: Message) -> Task<Message> {
+        match message {
+            Message::Frame(instant) => {
+                if instant.duration_since(self.last_refresh) >= sysinfo::MINIMUM_CPU_UPDATE_INTERVAL
+                {
+                    self.sys.refresh_specifics(self.refreshes);
+                    self.cpu_graph.update(self.sys.global_cpu_usage());
+                    self.cpu_graph.cache.clear();
+
+                    self.last_refresh = instant;
+                }
+            }
+        }
+
         Task::none()
     }
     fn view(&self) -> Element<'_, Message, Theme, Renderer> {
-        widget::text("hiiiiiii").into()
+        widget::Canvas::new(&self.cpu_graph)
+            .width(Length::Fill)
+            .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 {