riversong code showcase

Source/Riversong/Game/UI/Panels/RuntimeTooltip/RuntimeTooltipUIView.cs

@@ -0,0 +1,52 @@
+using System;
+using Cysharp.Threading.Tasks;
+using UnityEngine;
+using UnityEngine.UIElements;
+
+namespace DanieleMarotta.RiversongCodeShowcase
+{
+    [UIView("runtime-tooltip")]
+    public class RuntimeTooltipUIView : UIView
+    {
+        private Label _content;
+
+        public override UniTask InitializeAsync(UIService uiService, VisualElement rootElement)
+        {
+            base.InitializeAsync(uiService, rootElement);
+
+            _content = rootElement.Q<Label>(className: "runtime-tooltip__content");
+
+            RootElement.SetPickingModeRecursive(PickingMode.Ignore);
+
+            return UniTask.CompletedTask;
+        }
+
+        public void AnchorTooltip(VisualElement anchor, string text)
+        {
+            _content.text = text;
+
+            var placeAbove = anchor.worldBound.center.y > Screen.height * 0.2f;
+
+            RootElement.EnableInClassList("runtime-tooltip--above", placeAbove);
+            RootElement.EnableInClassList("runtime-tooltip--below", !placeAbove);
+            
+            RootElement.schedule.Execute(() => ClampToScreen(anchor.worldBound, placeAbove));
+        }
+
+        private void ClampToScreen(Rect anchor, bool placeAbove)
+        {
+            var width = RootElement.resolvedStyle.width;
+            var height = RootElement.resolvedStyle.height;
+            if (width <= 0 || height <= 0) return;
+
+            var left = Mathf.Clamp(anchor.center.x - width / 2, 0, Mathf.Max(0, Screen.width - width));
+
+            const float verticalGap = 32;
+            var top = placeAbove ? anchor.yMin - verticalGap - height : anchor.yMax + verticalGap;
+            top = Mathf.Clamp(top, 0, Mathf.Max(0, Screen.height - height));
+
+            RootElement.style.left = left + width / 2;
+            RootElement.style.top = placeAbove ? top + height : top;
+        }
+    }
+}