Toggle debug state with f12

tetris/src/debug.rs

@@ -12,11 +12,16 @@ pub struct DebugPlugin;
 // - Show current state(s)
 impl Plugin for DebugPlugin {
     fn build(&self, app: &mut App) {
-        app.add_systems(Update, (
-            log_transition::<Debugger>.run_if(state_changed::<Debugger>),
-            log_transition::<Loading>.run_if(state_changed::<Loading>),
-            log_transition::<GameState>.run_if(state_changed::<GameState>),
-        ));
+        app
+            .init_state::<Debugger>()
+            .add_systems(Update,
+            // Logging state transitions
+            (
+                log_transition::<Debugger>.run_if(state_changed::<Debugger>),
+                log_transition::<Loading>.run_if(state_changed::<Loading>),
+                log_transition::<GameState>.run_if(state_changed::<GameState>),
+            ))
+            .add_systems(Update, toggle_debug.run_if(input_just_pressed(KeyCode::F12)));
     }
 }
 
@@ -28,6 +33,7 @@ pub enum Debugger {
     On,
 }
 
+/// Logs all state transitions for state T
 fn log_transition<T: States + PartialEq + Clone>(
     curr: Res<State<T>>,
     mut prev: Local<Option<T>>,
@@ -38,3 +44,16 @@ fn log_transition<T: States + PartialEq + Clone>(
 
     *prev = Some(curr.get().clone());
 }
+
+/// Toggle the debug state when a key is pressed
+fn toggle_debug(
+    curr: Res<State<Debugger>>,
+    mut next: ResMut<NextState<Debugger>>,
+) {
+    next.set(
+        match curr.get() {
+            Debugger::On => Debugger::Off,
+            Debugger::Off => Debugger::On,
+        }
+    );
+}