riversong code showcase

Source/Riversong/Game/UI/Panels/PausePopup/PausePopupUIView.cs

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+using System;
+using Cysharp.Threading.Tasks;
+using UnityEngine.UIElements;
+
+namespace DanieleMarotta.RiversongCodeShowcase
+{
+    [UIView("pause-popup")]
+    public class PausePopupUIView : UIView
+    {
+        private Button _feedbackButton;
+
+        private Button _quitButton;
+
+        private EventCallback<ClickEvent> _onFeedbackButtonClick;
+
+        private EventCallback<ClickEvent> _onQuitButtonClick;
+
+        public event Action FeedbackButtonClick;
+
+        public event Action QuitButtonClick;
+
+        public override UniTask InitializeAsync(UIService uiService, VisualElement rootElement)
+        {
+            base.InitializeAsync(uiService, rootElement);
+
+            _feedbackButton = rootElement.Q<Button>(className: "pause-popup__feedback-button");
+            _onFeedbackButtonClick = _ => FeedbackButtonClick?.Invoke();
+            _feedbackButton.RegisterCallback(_onFeedbackButtonClick);
+
+            _quitButton = rootElement.Q<Button>(className: "pause-popup__quit-button");
+            _onQuitButtonClick = _ => QuitButtonClick?.Invoke();
+            _quitButton.RegisterCallback(_onQuitButtonClick);
+
+            return UniTask.CompletedTask;
+        }
+
+        public override void Dispose()
+        {
+            _feedbackButton?.UnregisterCallback(_onFeedbackButtonClick);
+            _quitButton?.UnregisterCallback(_onQuitButtonClick);
+        }
+    }
+}