Feat: continue refactoring

src/state/mod.rs

@@ -1,3 +1,18 @@
+pub trait CyclicEnum: Sized + Copy + PartialEq + 'static {
+    const VARIANTS: &'static [Self];
+
+    fn next(self) -> Self {
+        let pos = Self::VARIANTS.iter().position(|v| *v == self).unwrap_or(0);
+        Self::VARIANTS[(pos + 1) % Self::VARIANTS.len()]
+    }
+
+    fn prev(self) -> Self {
+        let len = Self::VARIANTS.len();
+        let pos = Self::VARIANTS.iter().position(|v| *v == self).unwrap_or(0);
+        Self::VARIANTS[(pos + len - 1) % len]
+    }
+}
+
 pub mod audio;
 pub mod color_scheme;
 pub mod editor;
@@ -14,10 +29,12 @@ pub mod ui;
 
 pub use audio::{AudioSettings, DeviceKind, EngineSection, Metrics, SettingKind};
 pub use color_scheme::ColorScheme;
-pub use options::{OptionsFocus, OptionsState};
-pub use editor::{CopiedStepData, CopiedSteps, EditorContext, Focus, PatternField, PatternPropsField, StackCache};
+pub use editor::{
+    CopiedStepData, CopiedSteps, EditorContext, PatternField, PatternPropsField, StackCache,
+};
 pub use live_keys::LiveKeyState;
 pub use modal::Modal;
+pub use options::{OptionsFocus, OptionsState};
 pub use panel::{PanelFocus, PanelState, SidePanel};
 pub use patterns_nav::{PatternsColumn, PatternsNav};
 pub use playback::{PlaybackState, StagedChange};