Add GridContainer.

TestGame/TestGame.cs

@@ -117,5 +117,5 @@ public class TestGame : Game
     private ResourceRef<Sound> _sound;
     private ResourceRef<Texture2d> _icon;
 
-    private HorizontalContainer _container = new(spacing: 8.0f);
+    private GridContainer _container = new();
 }

Voile/Source/UI/Containers/GridContainer.cs

@@ -0,0 +1,70 @@
+using System.Numerics;
+using Voile.Rendering;
+
+namespace Voile.UI.Containers;
+
+public class GridContainer : Container, IRenderableElement
+{
+    public int Columns { get; set; } = 2;
+    public float ColumnSpacing { get; set; } = 16.0f;
+    public float RowSpacing { get; set; } = 16.0f;
+    public bool Visible { get => throw new NotImplementedException(); set => throw new NotImplementedException(); }
+
+    public GridContainer(List<IElement> children, int columns = 2, float colSpacing = 16.0f, float rowSpacing = 16.0f)
+        : base(children)
+    {
+        Columns = columns;
+        ColumnSpacing = colSpacing;
+        RowSpacing = rowSpacing;
+    }
+
+    public GridContainer(int columns = 2, float colSpacing = 16.0f, float rowSpacing = 16.0f)
+    {
+        Columns = columns;
+        ColumnSpacing = colSpacing;
+        RowSpacing = rowSpacing;
+    }
+
+    public override void Arrange()
+    {
+        float startX = Position.X;
+        float startY = Position.Y;
+
+        float currentX = startX;
+        float currentY = startY;
+        int colIndex = 0;
+
+        foreach (var child in Children)
+        {
+            child.Position = new Vector2(currentX, currentY);
+
+            float childWidth = 0.0f;
+            float childHeight = 0.0f;
+
+            childWidth = child.Size.Width;
+            childHeight = child.Size.Height;
+
+            colIndex++;
+
+            if (colIndex >= Columns)
+            {
+                colIndex = 0;
+                currentX = startX;
+                currentY += childHeight + RowSpacing;
+            }
+            else
+            {
+                currentX += childWidth + ColumnSpacing;
+            }
+        }
+    }
+
+    public void Render(RenderSystem renderer, Style style)
+    {
+        foreach (var child in Children)
+        {
+            if (child is not IRenderableElement renderable) continue;
+            renderable.Render(renderer, style);
+        }
+    }
+}