Debug toggling (#9)

#8 introduced some additional debug information to the view, which was already
rendering some information and visualizations which were not necessary relevant
to the end-user experience. This PR adds an input action (bound to Ctrl + `) to
toggle the display of those visualizations, and disables them by default.

studio/src/ui/fps.rs

@@ -3,13 +3,19 @@ use bevy::{
     prelude::*,
 };
 
+use crate::debug::DebugMode;
+
 pub(super) struct FpsCounterPlugin;
 
 impl Plugin for FpsCounterPlugin {
     fn build(&self, app: &mut App) {
         app.add_plugins(FrameTimeDiagnosticsPlugin)
             .add_systems(Startup, layout)
-            .add_systems(Update, update);
+            .add_systems(Update, update)
+            .add_systems(
+                Update,
+                update_visibility.run_if(resource_exists_and_changed::<DebugMode>()),
+            );
     }
 }
 
@@ -17,24 +23,28 @@ impl Plugin for FpsCounterPlugin {
 struct FramerateCounter;
 
 fn layout(mut cmd: Commands) {
+    let mut text_bundle = TextBundle::from_section(
+        "0 fps",
+        TextStyle {
+            color: Color::GREEN,
+            font_size: 14.,
+            ..default()
+        },
+    )
+    .with_text_alignment(TextAlignment::Right)
+    .with_style(Style {
+        position_type: PositionType::Absolute,
+        right: Val::Px(16.),
+        bottom: Val::Px(16.),
+        ..default()
+    });
+
+    text_bundle.visibility = Visibility::Hidden;
+
     cmd.spawn((
         FramerateCounter,
         Name::new("Framerate Counter"),
-        TextBundle::from_section(
-            "0 fps",
-            TextStyle {
-                color: Color::GREEN,
-                font_size: 14.,
-                ..default()
-            },
-        )
-        .with_text_alignment(TextAlignment::Right)
-        .with_style(Style {
-            position_type: PositionType::Absolute,
-            right: Val::Px(16.),
-            bottom: Val::Px(16.),
-            ..default()
-        }),
+        text_bundle,
     ));
 }
 
@@ -53,3 +63,15 @@ fn update(
         counter.single_mut().sections[0].value = format!("{fps:.2} fps");
     }
 }
+
+fn update_visibility(
+    r_debug: Res<DebugMode>,
+    mut q_visibility: Query<&mut Visibility, With<FramerateCounter>>,
+) {
+    for mut visibility in q_visibility.iter_mut() {
+        *visibility = match **r_debug {
+            true => Visibility::Inherited,
+            false => Visibility::Hidden,
+        }
+    }
+}