(autoformat)

Oops. Yay for rushed work.

src/game/mod.rs

@@ -16,16 +16,22 @@ pub mod machines {
 
   use bevy::prelude::*;
 
+  use crate::game::consumables::Fuel;
+
   #[derive(Component)]
+  #[require(Fuel)]
   pub struct CuttingMachine;
 
   #[derive(Component)]
+  #[require(Fuel)]
   pub struct RotatingMachine;
 
   #[derive(Component)]
+  #[require(Fuel)]
   pub struct FlippingMachine;
 
   #[derive(Component)]
+  #[require(Fuel)]
   pub struct TransposingMachine;
 }
 
@@ -35,6 +41,11 @@ pub mod consumables {
   #[derive(Component)]
   pub struct Fuel(pub u32);
 
+  impl Default for Fuel {
+    fn default() -> Self {
+      Self(5)
+    }
+  }
   #[derive(Event)]
   pub struct FuelChanged;
 }

src/main.rs

@@ -2,10 +2,7 @@ use bevy::{color::palettes::css::*, prelude::*, window::WindowResolution};
 use bevy_inspector_egui::{bevy_egui::EguiPlugin, quick::WorldInspectorPlugin};
 
 use crate::{
-  game::{
+  game::machines::{CuttingMachine, FlippingMachine, RotatingMachine, TransposingMachine},
-    consumables::Fuel,
-    machines::{CuttingMachine, FlippingMachine, RotatingMachine, TransposingMachine},
-  },
   resources::UiTheme,
   widgets::SpawnUi,
 };
@@ -50,7 +47,6 @@ fn dummy_machines(mut commands: Commands) {
   commands
     .spawn((
       CuttingMachine,
-      Fuel(10),
       Sprite::from_color(RED, Vec2::splat(40.0)),
       Transform::from_translation(Vec3::new(-40.0, 40.0, 0.0)),
       Pickable::default(),
@@ -59,6 +55,7 @@ fn dummy_machines(mut commands: Commands) {
 
   commands
     .spawn((
+      RotatingMachine,
       Sprite::from_color(GREEN, Vec2::splat(40.0)),
       Transform::from_translation(Vec3::new(40.0, 40.0, 0.0)),
       Pickable::default(),
@@ -68,6 +65,7 @@ fn dummy_machines(mut commands: Commands) {
   // TODO: The other observers, once they have a spawner struct & impl.
   commands
     .spawn((
+      FlippingMachine,
       Sprite::from_color(PURPLE, Vec2::splat(40.)),
       Transform::from_translation(Vec3::new(-40.0, -40.0, 0.0)),
       Pickable::default(),
@@ -76,6 +74,7 @@ fn dummy_machines(mut commands: Commands) {
 
   commands
     .spawn((
+      TransposingMachine,
       Sprite::from_color(DARK_ORANGE, Vec2::splat(40.)),
       Transform::from_translation(Vec3::new(40.0, -40.0, 0.0)),
       Pickable::default(),

src/widgets/fuel_gauge.rs

@@ -1,9 +1,15 @@
-use bevy::{color::palettes::css::*, prelude::*, ui::Val::*};
+use bevy::{
+  color::palettes::css::*,
+  ecs::{component::HookContext, world::DeferredWorld},
+  prelude::*,
+  ui::Val::*,
+};
 
 use crate::game::consumables::{Fuel, FuelChanged};
 
 #[derive(Component)]
 #[require(Label)]
+#[component(on_add = FuelGauge::refresh_label)]
 pub struct FuelGauge(Entity);
 
 impl FuelGauge {
@@ -41,4 +47,23 @@ impl FuelGauge {
     );
     label.0 = format!("Fuel: {}", fuel.0);
   }
+
+  fn refresh_label(mut world: DeferredWorld, ctx: HookContext) {
+    // Get the machine ID from the FuelGauge component.
+    let Some(machine_id) = world.get::<FuelGauge>(ctx.entity).map(|fg| fg.0) else {
+      panic!("Couldn't get a FuelGauge during it's on-add hook run!");
+    };
+    // and fuel level
+    let Some(fuel) = world.get::<Fuel>(machine_id).map(|lvl| lvl.0) else {
+      // TODO: Maybe don't panic and just emit a warning.
+      panic!("Couldn't get a Fuel for a machine during a FuelGauge on-add hook.");
+    };
+
+    // Get an excl ref to the Text component so we can redraw its text
+    let Some(mut label) = world.get_mut::<Text>(ctx.entity) else {
+      panic!()
+    };
+
+    label.0 = format!("Fuel: {}", fuel);
+  }
 }

src/widgets/machines.rs

@@ -52,7 +52,7 @@ impl SpawnUi for RotatingMachine {
   fn spawn_ui(mut commands: Commands, theme: Res<UiTheme>, machine_id: Entity) {
     let base_entity = machine_ui_base(&mut commands, "Rotating Machine", &theme);
     commands.entity(base_entity).with_children(|commands| {
-      commands.spawn(FuelGauge::bundle(Entity::PLACEHOLDER));
+      commands.spawn(FuelGauge::bundle(machine_id));
 
       // Center panel (placeholder for input-output rotation)
       commands.spawn((
@@ -87,7 +87,7 @@ impl SpawnUi for FlippingMachine {
   fn spawn_ui(mut commands: Commands, theme: Res<UiTheme>, machine_id: Entity) {
     let base_entity = machine_ui_base(&mut commands, "Flipping Machine", &theme);
     commands.entity(base_entity).with_children(|commands| {
-      commands.spawn(FuelGauge::bundle(Entity::PLACEHOLDER));
+      commands.spawn(FuelGauge::bundle(machine_id));
 
       // Center panel (placeholder)
       commands.spawn((
@@ -122,7 +122,7 @@ impl SpawnUi for TransposingMachine {
   fn spawn_ui(mut commands: Commands, theme: Res<UiTheme>, machine_id: Entity) {
     let base_entity = machine_ui_base(&mut commands, "Transposing Machine", &theme);
     commands.entity(base_entity).with_children(|commands| {
-      commands.spawn(FuelGauge::bundle(Entity::PLACEHOLDER));
+      commands.spawn(FuelGauge::bundle(machine_id));
 
       // Center panel (placeholder)
       commands.spawn((