Skeleton of an editor. Just a window with solid toggling.

rust-toolchain.toml

@@ -6,13 +6,13 @@ components = [
 	"rls",
 	"rustc-dev",
 	"rustfmt",
-	"wasm-bindgen-cli",
-	"wasm-server-runner",
+	# "wasm-bindgen-cli",
+	# "wasm-server-runner",
 ]
 targets = [
-	"aarch64-apple-darwin",
-	"wasm32-unknown-unknown",
-	"x86_64-apple-darwin",
+	# "aarch64-apple-darwin",
+	# "wasm32-unknown-unknown",
+	# "x86_64-apple-darwin",
+	# "x86_64-unknown-linux-gnu",
 	"x86_64-pc-windows-msvc",
-	"x86_64-unknown-linux-gnu",
 ]

src/conditions.rs

@@ -0,0 +1,5 @@
+use bevy::prelude::*;
+
+pub(crate) fn any_component_added<T: Component>(q: Query<Entity, Added<T>>) -> bool {
+    !q.is_empty()
+}

src/editor.rs

@@ -0,0 +1,163 @@
+use crate::prelude::*;
+
+pub(crate) struct EditorPlugin;
+
+impl Plugin for EditorPlugin {
+    fn build(&self, app: &mut App) {
+        app.init_state::<EditorState>()
+            .add_systems(Startup, init_editor)
+            .add_systems(
+                Update,
+                toggle_editor_state.run_if(input_just_pressed(KeyCode::F3)),
+            )
+            .add_systems(
+                OnTransition {
+                    from: EditorState::Open,
+                    to: EditorState::Closed,
+                },
+                toggle_editor_window,
+            )
+            .add_systems(
+                OnTransition {
+                    from: EditorState::Closed,
+                    to: EditorState::Open,
+                },
+                toggle_editor_window,
+            )
+            .add_systems(
+                Update,
+                handle_window_close.run_if(on_event::<WindowCloseRequested>()),
+            );
+    }
+}
+
+/// Tracking the open/closed state of the editor
+#[derive(States, Debug, Clone, PartialEq, Eq, Hash, Default, Component)]
+enum EditorState {
+    /// The editor is closed => the editor window is disabled
+    #[default]
+    Closed,
+    /// The editor is open => the editor window is visible
+    Open,
+}
+
+impl std::ops::Not for &EditorState {
+    type Output = EditorState;
+
+    fn not(self) -> Self::Output {
+        match self {
+            EditorState::Open => EditorState::Closed,
+            EditorState::Closed => EditorState::Open,
+        }
+    }
+}
+
+impl std::convert::From<&EditorState> for bool {
+    fn from(value: &EditorState) -> bool {
+        match value {
+            EditorState::Open => true,
+            EditorState::Closed => false,
+        }
+    }
+}
+
+/// Tag component for editor entities
+#[derive(Component)]
+struct EditorTag;
+
+/// At startup initialize some editor components
+fn init_editor(mut commands: Commands) {
+    // Editor window
+    let editor_window = commands
+        .spawn((
+            EditorTag,
+            Window {
+                visible: false,
+                title: "Editor".into(),
+                ..default()
+            },
+        ))
+        .id();
+
+    // Editor camera
+    let editor_camera = commands
+        .spawn((
+            EditorTag,
+            Camera3dBundle {
+                camera: Camera {
+                    target: RenderTarget::Window(WindowRef::Entity(editor_window)),
+                    ..default()
+                },
+                ..default()
+            },
+        ))
+        .id();
+
+    // Editor UI elements
+    commands
+        .spawn((
+            EditorTag,
+            TargetCamera(editor_camera),
+            NodeBundle { ..default() },
+        ))
+        .with_children(|parent| {
+            parent.spawn((
+                EditorTag,
+                TextBundle::from_section(
+                    "Welcome to the editor",
+                    TextStyle {
+                        color: Color::WHITE,
+                        ..default()
+                    },
+                ),
+            ));
+        });
+}
+
+fn toggle_editor_state(
+    curr_state: Res<State<EditorState>>,
+    mut next_state: ResMut<NextState<EditorState>>,
+    keys: Res<ButtonInput<KeyCode>>,
+    mut catch: Local<bool>,
+) {
+    if keys.pressed(KeyCode::F3) && !*catch {
+        *catch = true;
+        match curr_state.get() {
+            EditorState::Open => next_state.set(EditorState::Closed),
+            EditorState::Closed => next_state.set(EditorState::Open),
+        }
+    } else {
+        *catch = false;
+    }
+}
+
+fn toggle_editor_window(
+    state: Res<State<EditorState>>,
+    mut windows: Query<&mut Window, With<EditorTag>>,
+    mut cameras: Query<&mut Camera, With<EditorTag>>,
+) {
+    let curr = state.get().into();
+    cameras.iter_mut().for_each(|mut camera| {
+        camera.is_active = curr;
+    });
+    windows.iter_mut().for_each(|mut window| {
+        window.visible = curr;
+    })
+}
+
+/// Handles window close requests which are only weird because of the editor
+/// When the editor window closes, just make it invisible and change the editor state to "Closed".
+fn handle_window_close(
+    mut events: EventReader<WindowCloseRequested>,
+    editor_windows: Query<Entity, With<EditorTag>>,
+    mut editor_state: ResMut<NextState<EditorState>>,
+) {
+    events
+        .read()
+        // Filter events down to jus those affecting the editor window
+        .filter_map(|WindowCloseRequested { window }| editor_windows.get(*window).ok())
+        // For each related close event, send out a "Close the editor" state transition
+        .for_each(|_| {
+            editor_state.set(EditorState::Closed);
+        });
+}

src/main.rs

@@ -1,14 +1,26 @@
+/// ECS scheduling `run_if` conditions
+pub(crate) mod conditions;
+/// Editor: debugging and run-time modifications to the game
+pub(crate) mod editor;
+/// Menu: Main and otherwise
+pub(crate) mod menu;
 /// Helper module containing common imports across the project
 pub(crate) mod prelude;
-
-/// Menu plugin, state, systems
-pub(crate) mod menu;
+/// Window handling
+pub(crate) mod window;
 
 use crate::prelude::*;
 
 fn main() {
     App::new()
-        .add_plugins(DefaultPlugins)
+        .add_plugins(DefaultPlugins.set(WindowPlugin {
+            // handled in crate::window::handle_window_close and crate::editor::handle_window_close
+            close_when_requested: false,
+            exit_condition: bevy::window::ExitCondition::OnPrimaryClosed,
+            ..default()
+        }))
         .add_plugins(menu::MenuPlugin)
+        .add_plugins(editor::EditorPlugin)
+        .add_plugins(window::WindowPlugin)
         .run();
 }

src/menu.rs

@@ -9,23 +9,21 @@ impl Plugin for MenuPlugin {
 }
 
 fn init_menu(mut commands: Commands) {
-	commands.spawn(Camera3dBundle { ..default() });
+    commands.spawn(Camera3dBundle { ..default() });
     commands
         .spawn(NodeBundle {
-			style: Style {
-				max_width: Val::Percent(60.0),
-				max_height: Val::Percent(100.0),
-				..default()
-			},
-			..default()
-		})
+            style: Style {
+                max_width: Val::Percent(60.0),
+                max_height: Val::Percent(100.0),
+                ..default()
+            },
+            ..default()
+        })
         .with_children(|parent| {
             parent.spawn(TextBundle {
-                style: Style {
-                    ..default()
-                },
+                style: Style { ..default() },
                 text: Text {
-					justify: JustifyText::Center,
+                    justify: JustifyText::Center,
                     sections: vec![
                         TextSection::new(
                             "ACTS",

src/prelude.rs

@@ -1 +1,9 @@
+pub(crate) use bevy::app::AppExit;
+pub(crate) use bevy::input::common_conditions::input_just_pressed;
 pub(crate) use bevy::prelude::*;
+pub(crate) use bevy::render::camera::RenderTarget;
+pub(crate) use bevy::window::PrimaryWindow;
+pub(crate) use bevy::window::WindowCloseRequested;
+pub(crate) use bevy::window::WindowRef;
+
+pub(crate) use crate::conditions::*;

src/ui.rs

@@ -7,3 +7,9 @@ impl Plugin for UiPlugin {
         app.add_systems(Startup, init_ui);
     }
 }
+
+fn init_ui(
+    mut commands: Commands,
+) {
+    todo!()
+}

src/window.rs

@@ -0,0 +1,41 @@
+use crate::prelude::*;
+
+pub(crate) struct WindowPlugin;
+
+impl Plugin for WindowPlugin {
+    fn build(&self, app: &mut App) {
+        app.add_systems(
+            Update,
+            setup_primary.run_if(any_component_added::<PrimaryWindow>),
+        )
+        .add_systems(
+            Update,
+            handle_window_close.run_if(on_event::<WindowCloseRequested>()),
+        );
+    }
+}
+
+fn setup_primary(mut events: Query<&mut Window, Added<PrimaryWindow>>) {
+    events.iter_mut().for_each(|mut window| {
+        window.title = "Acts of Gods".into();
+    });
+}
+
+/// Handles window close requests which are only weird because of the editor
+/// When the primary window closes shut down the game.
+fn handle_window_close(
+    mut events: EventReader<WindowCloseRequested>,
+    primary: Query<Entity, With<PrimaryWindow>>,
+    mut exit: EventWriter<AppExit>,
+) {
+    events
+        .read()
+        // FilterMap this entity to the primary window
+        // Meaning if we get Some(entity) the event was for the primary
+        // If we get None it was for a different window so we skip the for_each
+        .filter_map(|WindowCloseRequested { window }| primary.get(*window).ok())
+        // If this was the primary window, send an AppExit
+        .for_each(|_| {
+            exit.send(AppExit);
+        });
+}