nicer sample display

crates/cli/src/cli_groovebox.rs

@@ -33,18 +33,13 @@ impl GrooveboxCli {
         Tui::run(JackClient::new("tek_groovebox")?.activate_with(|jack|{
             let app  = tek::GrooveboxTui::try_from(jack)?;
             jack.read().unwrap().client().connect_ports(&app.player.midi_outs[0], &app.sampler.midi_in)?;
-
             jack.connect_midi_from(&app.player.midi_ins[0],    &self.midi_from)?;
             jack.connect_midi_from(&app.sampler.midi_in,       &self.midi_from)?;
-
             jack.connect_midi_to(&app.player.midi_outs[0],     &self.midi_to)?;
-
             jack.connect_audio_from(&app.sampler.audio_ins[0], &self.l_from)?;
             jack.connect_audio_from(&app.sampler.audio_ins[1], &self.r_from)?;
-
             jack.connect_audio_to(&app.sampler.audio_outs[0],  &self.l_to)?;
             jack.connect_audio_to(&app.sampler.audio_outs[1],  &self.r_to)?;
-
             Ok(app)
         })?)?;
         Ok(())

crates/tek/src/sampler/sample_viewer.rs

@@ -1,6 +1,6 @@
 use crate::*;
 use std::ops::Deref;
-use ratatui::{prelude::Rect, widgets::{Widget, canvas::{Canvas, Points}}};
+use ratatui::{prelude::Rect, widgets::{Widget, canvas::{Canvas, Points, Line}}};
 
 const EMPTY: &[(f64, f64)] = &[(0., 0.), (1., 1.), (2., 2.), (0., 2.), (2., 0.)];
 
@@ -8,8 +8,8 @@ pub struct SampleViewer(pub Option<Arc<RwLock<Sample>>>);
 render!(<Tui>|self: SampleViewer|render(|to|{
     let [x, y, width, height] = to.area();
     let area = Rect { x, y, width, height };
-    let mut points = vec![];
-    let (x_bounds, y_bounds, coords): ([f64;2], [f64;2], &[(f64,f64)]) =
+    let min_db = -40.0;
+    let (x_bounds, y_bounds, lines): ([f64;2], [f64;2], Vec<Line>) =
         if let Some(sample) = &self.0 {
             let sample = sample.read().unwrap();
             let start  = sample.start  as f64;
@@ -17,28 +17,36 @@ render!(<Tui>|self: SampleViewer|render(|to|{
             let length = end - start;
             let step   = length / width as f64;
             let mut t = start;
+            let mut lines = vec![];
             while t < end {
                 let chunk = &sample.channels[0][t as usize..((t + step) as usize).min(sample.end)];
                 let total: f32 = chunk.iter().map(|x|x.abs()).sum();
                 let count = chunk.len() as f32;
                 let meter = 10. * (total / count).log10();
-                points.push((t as f64, meter as f64));
+                let x = t as f64;
+                let y = meter as f64;
+                lines.push(Line::new(x, min_db, x, y, Color::Green));
                 t += step;
             }
             (
                 [sample.start as f64, sample.end as f64],
-                [-40., 0.],
-                points.as_slice()
+                [min_db, 0.],
+                lines
             )
         } else {
             (
-                [0.0, f64::from(width)],
-                [0.0, f64::from(height)],
-                EMPTY
+                [0.0, width  as f64],
+                [0.0, height as f64],
+                vec![
+                    Line::new(0.0, 0.0, width as f64, height as f64, Color::Red),
+                    Line::new(width as f64, 0.0, 0.0, height as f64, Color::Red),
+                ]
             )
         };
     Canvas::default().x_bounds(x_bounds).y_bounds(y_bounds).paint(|ctx|{
-        ctx.draw(&Points { coords, color: Color::Rgb(255,0,0) })
+        for line in lines.iter() {
+            ctx.draw(line)
+        }
     }).render(area, &mut to.buffer);
     Ok(())
 }));