Show current mode in title row

This may be later isolated to debug builds

core/src/components/fps.rs

@@ -30,6 +30,8 @@ use crate::action::Action;
 
 #[derive(Debug, Clone, PartialEq)]
 pub struct FpsCounter {
+    mode: String,
+
     last_tick_update: Instant,
     tick_count: u32,
     ticks_per_second: f64,
@@ -49,6 +51,7 @@ impl FpsCounter {
     #[must_use]
     pub fn new() -> Self {
         Self {
+            mode: String::from(""),
             last_tick_update: Instant::now(),
             tick_count: 0,
             ticks_per_second: 0.0,
@@ -88,29 +91,44 @@ impl FpsCounter {
 impl Component for FpsCounter {
     fn update(&mut self, action: Action) -> Result<Option<Action>> {
         match action {
-            Action::Tick => self.app_tick()?,
+            Action::SetMode(mode) => {
+                self.mode = format!("{:?}", mode);
+            }
             Action::Render => self.render_tick()?,
+            Action::Tick => self.app_tick()?,
             _ => {}
         };
         Ok(None)
     }
 
     fn draw(&mut self, frame: &mut Frame, area: Rect) -> Result<()> {
-        let [column, _] =
-            Layout::horizontal([Constraint::Min(1), Constraint::Length(2)]).areas(area);
         let [_, row, _] = Layout::vertical([
             Constraint::Length(1),
             Constraint::Length(1),
             Constraint::Min(0),
         ])
-        .areas(column);
+        .areas(area);
+        let [_, left, right, _] = Layout::horizontal([
+            Constraint::Length(2),
+            Constraint::Min(1),
+            Constraint::Min(1),
+            Constraint::Length(2),
+        ])
+        .areas(row);
+
+        // Debug
+        let span = Span::styled(format!("Mode: {}", &self.mode), Style::new().dim());
+        let paragraph = Paragraph::new(span).left_aligned();
+        frame.render_widget(paragraph, left);
+
+        // FPS
         let message = format!(
             "{:.2} ticks/sec, {:.2} FPS",
             self.ticks_per_second, self.frames_per_second
         );
         let span = Span::styled(message, Style::new().dim());
         let paragraph = Paragraph::new(span).right_aligned();
-        frame.render_widget(paragraph, row);
+        frame.render_widget(paragraph, right);
         Ok(())
     }
 }