menu works lol

crates/app/app.rs

@@ -31,12 +31,18 @@ pub struct App {
     /// Contains the currently edited musical arrangement
     pub project: Arrangement,
 }
+#[derive(Debug, Clone, Default, PartialEq)]
+pub struct Axis {
+    min:  usize,
+    max:  usize,
+    step: usize,
+}
 /// Various possible dialog modes.
 #[derive(Debug, Clone, Default, PartialEq)]
 pub enum Dialog {
     #[default] None,
     Help(usize),
-    Menu(usize, usize),
+    Menu(usize, Arc<[Arc<str>]>),
     Device(usize),
     Message(Arc<str>),
     Browse(BrowseTarget, Arc<Browse>),
@@ -62,6 +68,25 @@ impl HasClipsSize   for App { fn clips_size (&self) -> &Measure<TuiOut> { &self.
 impl HasTrackScroll for App { fn track_scroll (&self) -> usize { self.project.track_scroll() } }
 impl HasSceneScroll for App { fn scene_scroll (&self) -> usize { self.project.scene_scroll() } }
 impl Dialog {
+    pub fn welcome () -> Self {
+        Self::Menu(0, [
+            "Continue session".into(),
+            "Load old session".into(),
+            "Begin new session".into(),
+        ].into())
+    }
+    pub fn menu_next (&self) -> Self {
+        match self {
+            Self::Menu(index, items) => Self::Menu(wrap_inc(*index, items.len()), items.clone()),
+            _ => Self::None
+        }
+    }
+    pub fn menu_prev (&self) -> Self {
+        match self {
+            Self::Menu(index, items) => Self::Menu(wrap_dec(*index, items.len()), items.clone()),
+            _ => Self::None
+        }
+    }
     pub fn menu_selected (&self) -> Option<usize> {
         if let Self::Menu(selected, _) = self { Some(*selected) } else { None }
     }
@@ -166,7 +191,6 @@ impl App {
     }
 }
 
-
 fn wrap_dialog (dialog: impl Content<TuiOut>) -> impl Content<TuiOut> {
     Fixed::xy(70, 23, Tui::fg_bg(Rgb(255,255,255), Rgb(16,16,16), Bsp::b(
         Repeat(" "), Outer(true, Style::default().fg(Tui::g(96))).enclose(dialog))))