riversong code showcase

Source/Riversong/Game/UI/Panels/TitleScreen/TitleScreenUIView.cs

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+using System;
+using System.Threading;
+using Cysharp.Threading.Tasks;
+using PrimeTween;
+using UnityEngine;
+using UnityEngine.UIElements;
+
+namespace DanieleMarotta.RiversongCodeShowcase
+{
+    [UIView("title-screen")]
+    public class TitleScreenUIView : UIView
+    {
+        private VisualElement _fader;
+
+        private VisualElement _logo;
+
+        private VisualElement _panel;
+
+        private Button _startGameButton;
+
+        private Label _versionLabel;
+
+        private CancellationTokenSource _animationCancellation;
+
+        public event Action StartGame;
+
+        public override UniTask InitializeAsync(UIService uiService, VisualElement rootElement)
+        {
+            base.InitializeAsync(uiService, rootElement);
+
+            _fader = rootElement.Q(className: "title-screen__fader");
+            _logo = rootElement.Q(className: "title-screen__logo-image");
+            _panel = rootElement.Q(className: "dialog");
+            _startGameButton = rootElement.Q<Button>(className: "title-screen__start-button");
+            _versionLabel = rootElement.Q<Label>(className: "title-screen__version");
+
+            _fader.style.display = DisplayStyle.None;
+            _fader.style.opacity = 0;
+            _logo.style.display = DisplayStyle.None;
+            _logo.style.opacity = 0;
+            _panel.style.display = DisplayStyle.None;
+            _panel.style.opacity = 0;
+
+            _startGameButton.RegisterCallbackOnce<ClickEvent>(_ => StartGame?.Invoke());
+
+            return UniTask.CompletedTask;
+        }
+
+        public override void Dispose()
+        {
+            _animationCancellation?.Cancel();
+            _animationCancellation?.Dispose();
+            _animationCancellation = null;
+
+            base.Dispose();
+        }
+
+        public void SetVersion(string versionText)
+        {
+            _versionLabel.text = versionText;
+        }
+
+        public async UniTask PlayIntroAsync()
+        {
+            Show(true);
+
+            await UniTask.NextFrame();
+
+            _logo.style.display = DisplayStyle.Flex;
+            _logo.style.top = Length.Percent(50);
+            await UIVisibilityAnimation.PlayShowTween(_logo);
+
+            await UniTask.WaitForSeconds(1);
+
+            await Tween.Custom(50, 33, 0.95f, value => _logo.style.top = Length.Percent(value), Ease.OutCubic);
+
+            await UniTask.WaitForSeconds(1);
+
+            _panel.style.display = DisplayStyle.Flex;
+            await UIVisibilityAnimation.PlayShowTween(_panel);
+
+            _logo.style.translate = new Translate(Length.Percent(-50), Length.Percent(-50));
+            _logo.SetScale(1);
+
+            _animationCancellation = new CancellationTokenSource();
+            PlayLogoIdleAnimationAsync(_animationCancellation.Token).Forget();
+        }
+
+        public async UniTask PlayStartFadeAsync(float duration)
+        {
+            _fader.style.display = DisplayStyle.Flex;
+            await Tween.Custom(0, 1, duration, value => _fader.style.opacity = value, Ease.OutQuad);
+        }
+
+        private async UniTask PlayLogoIdleAnimationAsync(CancellationToken cancellationToken)
+        {
+            try
+            {
+                float t = 0;
+
+                while (!cancellationToken.IsCancellationRequested)
+                {
+                    var sin = Mathf.Sin(t);
+
+                    _logo.style.translate = new Translate(Length.Percent(-50), Length.Percent(-50 + 3 * sin));
+                    _logo.SetScale(1 - 0.025f * sin);
+
+                    t += Time.deltaTime;
+
+                    await UniTask.NextFrame(cancellationToken);
+                }
+            }
+            catch (OperationCanceledException) when (cancellationToken.IsCancellationRequested)
+            {
+            }
+        }
+    }
+}