added sliders to dynamically select waveform resolution but also widgets refresh rate

src/main.rs

@@ -1,3 +1,5 @@
+use iced::Element;
+
 mod pw;
 mod waveform;
 
@@ -23,23 +25,26 @@ struct Rgba {
 
 #[derive(Debug, Clone, Copy)]
 enum Message {
+    Waveform(waveform::Message),
+    RateUpdated(f64),
     Tick,
 }
 
 impl RumbleWrecker {
     fn new() -> Self {
+        // Spawn default output monitor capture via pipewire
         let (tx_left, rx_left) = std::sync::mpsc::channel::<Vec<f32>>();
         let (tx_right, rx_right) = std::sync::mpsc::channel::<Vec<f32>>();
-
         std::thread::spawn(move || {
             let _pw_res = crate::pw::init_pw(tx_left, tx_right);
         });
 
+        // Init widgets with image size
         let w = 1024u32;
         let h = 256u32;
 
         Self {
-            refresh_rate: 40,
+            refresh_rate: 32,
             stream_left: rx_left,
             stream_right: rx_right,
             waveform: waveform::Waveform::new(w, h),
@@ -48,6 +53,14 @@ impl RumbleWrecker {
 
     fn update(&mut self, message: Message) {
         match message {
+            Message::Waveform(msg) => {
+                self.waveform.update(msg);
+            }
+
+            Message::RateUpdated(new_refresh_rate) => {
+                self.refresh_rate = (new_refresh_rate as u64).clamp(1, 200);
+            },
+
             Message::Tick => {
                 let mut left_samples = Vec::<f32>::new();
                 let mut right_samples = Vec::<f32>::new();
@@ -59,18 +72,26 @@ impl RumbleWrecker {
                 }
 
                 if !left_samples.is_empty() && !right_samples.is_empty() {
-                    self.waveform.update((&left_samples, &right_samples), 0.5);
+                    self.waveform.tick((&left_samples, &right_samples));
                 }
             }
         }
     }
 
     fn view(&self) -> iced::Element<'_, Message> {
-        let waveform = self.waveform.view();
+        let waveform : iced::Element<'_, Message> = self.waveform.view().map(Message::Waveform);
 
-        // refresh rate slider
+        let rate_label = iced::widget::text("Refresh rate:");
+        let rate_value = iced::widget::text(format!("{:3}ms", &self.refresh_rate));
+        let rate_slider: Element<'_, Message> = iced::widget::slider(1f64..=200f64, self.refresh_rate as f64, Message::RateUpdated).into();
+        let rate_row = iced::widget::Row::new()
+            .align_y(iced::Alignment::Center)
+            .spacing(12)
+            .push(rate_label)
+            .push(rate_value)
+            .push(rate_slider);
 
-        iced::widget::Column::new().push(waveform).into()
+        iced::widget::Column::new().push(waveform).push(rate_row).into()
     }
 
     fn subscription(&self) -> iced::Subscription<Message> {

src/waveform.rs

@@ -1,12 +1,19 @@
 use crate::Rgba;
 
 pub struct Waveform {
+    resolution: f32,
     rgba: Rgba,
 }
 
+#[derive(Debug, Clone, Copy)]
+pub enum Message {
+    ResolutionChanged(f32),
+}
+
 impl Waveform {
     pub fn new(width: u32, height: u32) -> Self {
         Self {
+            resolution: 0.5,
             rgba: Rgba {
                 width: width,
                 height: height,
@@ -15,14 +22,22 @@ impl Waveform {
         }
     }
 
-    pub fn update(&mut self, samples: (&Vec<f32>, &Vec<f32>), resolution: f32 ) {
+    pub fn update(&mut self, waveform_message: Message) {
+        match waveform_message {
+            Message::ResolutionChanged(new_resolution) => {
+                self.resolution = new_resolution.clamp(0.01, 1.0);
+            }
+        }
+    }
+
+    pub fn tick(&mut self, samples: (&Vec<f32>, &Vec<f32>)) {
         let (left_samples, right_samples) = samples;
         let mut last_rows = ((self.rgba.height/2) as usize, (self.rgba.height/2) as usize);
 
-        let span = (self.rgba.width as f32 * resolution) as usize;
+        let span = (self.rgba.width as f32 * self.resolution) as usize;
         let moved_start = self.rgba.width as usize - span;
 
-        if resolution < 1.0 {
+        if self.resolution < 1.0 {
             let mut previous_left_row = (self.rgba.height as usize, 0usize);
             let mut previous_right_row = (self.rgba.height as usize, 0usize);
             
@@ -96,15 +111,18 @@ impl Waveform {
         }
     }
 
-
+    pub fn view(&self) -> iced::Element<'_, Message> {
-
-    pub fn view(&self) -> iced::Element<'_, crate::Message> {
         let img_handle = iced::widget::image::Handle::from_rgba(
             self.rgba.width,
             self.rgba.height,
             self.rgba.pixels.clone()
         );
-        iced::widget::center_x(iced::widget::image(img_handle)).into()
+        let img: iced::Element<'_, Message> = iced::widget::image(img_handle).into();
+        // let centered_img = iced::widget::center_x(img);
+        let resolution_slider = iced::widget::Slider::new(0.05..=1.0, self.resolution, Message::ResolutionChanged).step(0.05);
+        // let resolution_slider = iced::widget::slider(0.05..=1.0, self.resolution, Message::ResolutionChanged);
+
+        iced::widget::Column::new().push(img).push(resolution_slider).into()
     }
 
 }