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Src/Unity/Scripts/UX/Library/CellContainer.cs

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+using System.Collections;
+using System.Collections.Generic;
+using UnityEngine;
+using UnityEngine.UIElements;
+
+namespace BITKit.UX
+{
+    public class CellContainer : VisualElement
+    {
+        public new class UxmlFactory : UxmlFactory<CellContainer, UxmlTraits> { }
+
+        public int CellSize { get; set; } = 64;
+        public CellContainer()
+        {
+            
+            RegisterCallback<CustomStyleResolvedEvent>(x =>
+            {
+                MarkDirtyRepaint();
+            });
+            generateVisualContent += GenerateVisualContent;
+        }
+
+        private void GenerateVisualContent(MeshGenerationContext obj)
+        {
+            if(contentRect.height<=0 || contentRect.width<=0)return;
+
+            var painter = obj.painter2D;
+
+            painter.lineWidth = resolvedStyle.borderTopWidth;
+            painter.strokeColor = resolvedStyle.borderTopColor;
+
+            var yCount = contentRect.height / CellSize;
+            var xCount = contentRect.width / CellSize;
+            
+            for (var x = 1; x < xCount; x++)
+            {
+                painter.BeginPath();
+                painter.MoveTo(new Vector2(x * CellSize, 0));
+                painter.LineTo(new Vector2(x * CellSize, contentRect.height));
+                painter.Stroke();
+            }
+            for (var y = 1; y < yCount; y++)
+            {
+                painter.BeginPath();
+                painter.MoveTo(new Vector2(0, y * CellSize));
+                painter.LineTo(new Vector2(contentRect.width, y * CellSize));
+                painter.Stroke();
+            }
+        }
+    }
+
+}

Src/Unity/Scripts/UX/Library/CellContainer.cs.meta

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