randomize arrangement bg color

crates/tek_sequencer/src/arranger.rs

@@ -33,7 +33,9 @@ pub struct Arrangement<E: Engine> {
     /// Display mode of arranger
     pub mode:     ArrangementViewMode,
     /// Whether the arranger is currently focused
-    pub focused:  bool
+    pub focused:  bool,
+    /// Background color of arrangement
+    pub color:    Color,
 }
 /// Represents a track in the arrangement
 pub struct ArrangementTrack<E: Engine> {
@@ -149,7 +151,8 @@ impl<E: Engine> Arrangement<E> {
             phrases:  phrases.clone(),
             scenes:   vec![],
             tracks:   vec![],
-            focused:  false
+            focused:  false,
+            color:    Color::Rgb(28, 35, 25),
         }
     }
     pub fn activate (&mut self) {
@@ -277,7 +280,7 @@ impl<E: Engine> Arrangement<E> {
     }
     pub fn randomize_color (&mut self) {
         match self.selected {
-            ArrangementFocus::Mix        => {},
+            ArrangementFocus::Mix        => { self.color = random_color_dark() },
             ArrangementFocus::Track(t)   => { self.tracks[t].color = random_color() },
             ArrangementFocus::Scene(s)   => { self.scenes[s].color = random_color() },
             ArrangementFocus::Clip(t, s) => if let Some(phrase) = &self.scenes[s].clips[t] {

crates/tek_sequencer/src/arranger_tui.rs

@@ -53,7 +53,7 @@ impl<'a> Content for VerticalArranger<'a, Tui> {
         let tracks: &[ArrangementTrack<Tui>] = state.tracks.as_ref();
         let scenes: &[Scene] = state.scenes.as_ref();
         let offset = 3 + Scene::longest_name(scenes) as u16; // x of 1st track
-        let bg = Color::Rgb(28, 35, 25);
+        let bg = state.color;
         let clip_bg = Color::Rgb(40, 50, 30);
         let border_bg = Color::Rgb(40, 50, 30);
         let border_hi = Color::Rgb(100, 110, 40);

crates/tek_sequencer/src/lib.rs

@@ -36,11 +36,19 @@ tui_style!(WHITE_NOT_DIM_BOLD =
 pub fn random_okhsl () -> Okhsl<f32> {
     let mut rng = thread_rng();
     UniformOkhsl::new(
-        Okhsl::new(-180.0, 0.01, 0.1),
+        Okhsl::new(-180.0, 0.01, 0.2),
         Okhsl::new( 180.0, 0.9,  0.5),
     ).sample(&mut rng)
 }
 
+pub fn random_okhsl_dark () -> Okhsl<f32> {
+    let mut rng = thread_rng();
+    UniformOkhsl::new(
+        Okhsl::new(-180.0, 0.01, 0.05),
+        Okhsl::new( 180.0, 0.5,  0.2),
+    ).sample(&mut rng)
+}
+
 pub fn okhsl_to_rgb (color: Okhsl<f32>) -> Color {
     let Srgb { red, green, blue, .. }: Srgb<f32> = Srgb::from_color_unclamped(color);
     Color::Rgb((red   * 255.0) as u8, (green * 255.0) as u8, (blue  * 255.0) as u8,)
@@ -50,6 +58,10 @@ pub fn random_color () -> Color {
     okhsl_to_rgb(random_okhsl())
 }
 
+pub fn random_color_dark () -> Color {
+    okhsl_to_rgb(random_okhsl_dark())
+}
+
 pub fn random_color_near (color: Color, distance: f32) -> Color {
     let (r, g, b) = if let Color::Rgb(r, g, b) = color {
         (r, g, b)