1 files changed, 70 insertions, 0 deletions
diff --git a/Plugins/MonoGame.Extended/source/MonoGame.Extended.Gui/Controls/CompositeControl.cs b/Plugins/MonoGame.Extended/source/MonoGame.Extended.Gui/Controls/CompositeControl.cs
new file mode 100644
index 0000000..8217c69
--- /dev/null
+++ b/Plugins/MonoGame.Extended/source/MonoGame.Extended.Gui/Controls/CompositeControl.cs
@@ -0,0 +1,70 @@
+using System.Collections.Generic;
+using Microsoft.Xna.Framework;
+
+namespace MonoGame.Extended.Gui.Controls
+{
+    public abstract class CompositeControl : Control
+    {
+        protected CompositeControl()
+        {
+        }
+
+        protected bool IsDirty { get; set; } = true;
+
+        public abstract object Content { get; set; }
+
+        protected abstract Control Template { get; }
+
+        public override IEnumerable<Control> Children
+        {
+            get
+            {
+                var control = Template;
+
+                if (control != null)
+                    yield return control;
+            }
+        }
+
+        public override void InvalidateMeasure()
+        {
+            base.InvalidateMeasure();
+            IsDirty = true;
+        }
+
+        public override Size GetContentSize(IGuiContext context)
+        {
+            var control = Template;
+
+            if (control != null)
+                return Template.CalculateActualSize(context);
+
+            return Size.Empty;
+        }
+
+        public override void Update(IGuiContext context, float deltaSeconds)
+        {
+            var control = Template;
+
+            if (control != null)
+            {
+                if (IsDirty)
+                {
+                    control.Parent = this;
+                    control.ActualSize = ContentRectangle.Size;
+                    control.Position = new Point(Padding.Left, Padding.Top);
+                    control.InvalidateMeasure();
+                    IsDirty = false;
+                }
+            }
+        }
+
+        public override void Draw(IGuiContext context, IGuiRenderer renderer, float deltaSeconds)
+        {
+            base.Draw(context, renderer, deltaSeconds);
+
+            var control = Template;
+            control?.Draw(context, renderer, deltaSeconds);
+        }
+    }
+}
+\ No newline at end of file