Feat: begin slight refactoring

crates/ratatui/src/scope.rs

@@ -1,4 +1,4 @@
-use crate::theme::meter;
+use crate::theme;
 use ratatui::buffer::Buffer;
 use ratatui::layout::Rect;
 use ratatui::style::Color;
@@ -18,7 +18,7 @@ pub enum Orientation {
 pub struct Scope<'a> {
     data: &'a [f32],
     orientation: Orientation,
-    color: Color,
+    color: Option<Color>,
     gain: f32,
 }
 
@@ -27,7 +27,7 @@ impl<'a> Scope<'a> {
         Self {
             data,
             orientation: Orientation::Horizontal,
-            color: meter::LOW,
+            color: None,
             gain: 1.0,
         }
     }
@@ -38,7 +38,7 @@ impl<'a> Scope<'a> {
     }
 
     pub fn color(mut self, c: Color) -> Self {
-        self.color = c;
+        self.color = Some(c);
         self
     }
 }
@@ -49,11 +49,13 @@ impl Widget for Scope<'_> {
             return;
         }
 
+        let color = self.color.unwrap_or_else(|| theme::get().meter.low);
+
         match self.orientation {
             Orientation::Horizontal => {
-                render_horizontal(self.data, area, buf, self.color, self.gain)
+                render_horizontal(self.data, area, buf, color, self.gain)
             }
-            Orientation::Vertical => render_vertical(self.data, area, buf, self.color, self.gain),
+            Orientation::Vertical => render_vertical(self.data, area, buf, color, self.gain),
         }
     }
 }
@@ -64,7 +66,6 @@ fn render_horizontal(data: &[f32], area: Rect, buf: &mut Buffer, color: Color, g
     let fine_width = width * 2;
     let fine_height = height * 4;
 
-    // Auto-scale: find peak amplitude and normalize to fill height
     let peak = data.iter().map(|s| s.abs()).fold(0.0f32, f32::max);
     let auto_gain = if peak > 0.001 { gain / peak } else { gain };
 
@@ -121,7 +122,6 @@ fn render_vertical(data: &[f32], area: Rect, buf: &mut Buffer, color: Color, gai
     let fine_width = width * 2;
     let fine_height = height * 4;
 
-    // Auto-scale: find peak amplitude and normalize to fill width
     let peak = data.iter().map(|s| s.abs()).fold(0.0f32, f32::max);
     let auto_gain = if peak > 0.001 { gain / peak } else { gain };