riversong code showcase

Source/Riversong/Game/UI/Panels/BuildingPlacementTooltip/BuildingPlacementTooltipController.cs

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+using System;
+using Cysharp.Threading.Tasks;
+using UnityEngine.InputSystem;
+using UnityEngine.UIElements;
+
+namespace DanieleMarotta.RiversongCodeShowcase
+{
+    public class BuildingPlacementTooltipController : UIControllerSystem<BuildingPlacementTooltipUIView>, IUpdatable
+    {
+        [InjectService]
+        private IEditingService _editingService;
+
+        [InjectService]
+        private IPointerService _pointerService;
+
+        [InjectService]
+        private TextFormatHelper _textFormatHelper;
+
+        public BuildingPlacementTooltipController(IServiceLocator serviceLocator) : base(serviceLocator)
+        {
+        }
+
+        protected override BuildingPlacementTooltipUIView View => UIRoot.GetView<BuildingPlacementTooltipUIView>();
+
+        public override async UniTask InitializeAsync()
+        {
+            await base.InitializeAsync();
+
+            View.RootElement.SetPickingModeRecursive(PickingMode.Ignore);
+        }
+
+        public void Update()
+        {
+            if (_pointerService.IsPointerOverUI)
+            {
+                View.Clear();
+                return;
+            }
+
+            var editingState = _editingService.EditingState;
+
+            if (editingState.ActiveTool != editingState.BuildTool)
+            {
+                View.Clear();
+                return;
+            }
+
+            var validation = editingState.BuildTool.GetLastValidationResult();
+            if (validation == EditToolValidationResult.Success)
+            {
+                View.Clear();
+                return;
+            }
+
+            var buildingName = _textFormatHelper.FormatImportantText(editingState.BuildTool.Building.BuildingName);
+            var errorFormat = GetFailedValidationFormat(validation);
+            var text = string.Format(errorFormat, buildingName);
+
+            View.SetText(text);
+            View.RootElement.SetAbsoluteScreenPosition(Mouse.current.position.ReadValue());
+        }
+
+        private string GetFailedValidationFormat(EditToolValidationResult validation)
+        {
+            switch (validation)
+            {
+                case EditToolValidationResult.BlockedTile:
+                    return "There is an obstacle here";
+
+                case EditToolValidationResult.CanOnlyBePlacedNearWater:
+                    return "The {0} must be placed near water";
+
+                case EditToolValidationResult.CanOnlyBePlacedOnFertileGround:
+                    return "The {0} must be placed on fertile ground";
+
+                default:
+                    throw new ArgumentOutOfRangeException();
+            }
+        }
+    }
+}

Source/Riversong/Game/UI/Panels/BuildingPlacementTooltip/BuildingPlacementTooltipUIView.cs

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+using Cysharp.Threading.Tasks;
+using UnityEngine.UIElements;
+
+namespace DanieleMarotta.RiversongCodeShowcase
+{
+    [UIView("building-placement-tooltip")]
+    public class BuildingPlacementTooltipUIView : UIView
+    {
+        private Label _tooltipText;
+
+        public override UniTask InitializeAsync(UIService uiService, VisualElement rootElement)
+        {
+            base.InitializeAsync(uiService, rootElement);
+
+            _tooltipText = rootElement.Q<Label>();
+
+            return UniTask.CompletedTask;
+        }
+
+        public void SetText(string text)
+        {
+            _tooltipText.text = text;
+            Show(true, true);
+        }
+
+        public void Clear()
+        {
+            Show(false, true);
+        }
+    }
+}