Update

src/core/window/state.rs

@@ -0,0 +1,45 @@
+use bevy_ecs::world::World;
+use winit::{
+    application::ApplicationHandler,
+    event::WindowEvent,
+    event_loop::ActiveEventLoop,
+    window::{Window, WindowId},
+};
+
+use crate::core::app::App;
+
+use super::config::WindowConfig;
+
+pub struct WindowState {
+    app: App,
+    window: Option<Window>,
+}
+
+impl WindowState {
+    pub fn new(app: App) -> Self {
+        Self { app, window: None }
+    }
+
+    fn world(&self) -> &World {
+        self.app.world()
+    }
+}
+
+impl ApplicationHandler for WindowState {
+    fn resumed(&mut self, event_loop: &ActiveEventLoop) {
+        let window_config = self.world().get_resource::<WindowConfig>().unwrap();
+
+        let window = event_loop.create_window(window_config.into()).unwrap();
+        self.window = Some(window);
+    }
+
+    fn window_event(&mut self, event_loop: &ActiveEventLoop, _id: WindowId, event: WindowEvent) {
+        match event {
+            WindowEvent::CloseRequested => {
+                log::debug!("The close button was pressed; stopping");
+                event_loop.exit();
+            }
+            _ => {}
+        }
+    }
+}