项目结构调整

Others/Fluent.Ribbon/Fluent.Ribbon.Showcase/Adorners/SimpleControlAdorner.cs

@@ -0,0 +1,61 @@
+namespace FluentTest.Adorners
+{
+    using System;
+    using System.Windows;
+    using System.Windows.Documents;
+    using System.Windows.Media;
+
+    public class SimpleControlAdorner : Adorner
+    {
+        private FrameworkElement child;
+
+        public SimpleControlAdorner(UIElement adornedElement)
+            : base(adornedElement)
+        {
+        }
+
+        protected override int VisualChildrenCount => 1;
+
+        protected override Visual GetVisualChild(int index)
+        {
+            if (index != 0)
+            {
+                throw new ArgumentOutOfRangeException(nameof(index), index, "There is only one visual child.");
+            }
+
+            return this.child;
+        }
+
+        public FrameworkElement Child
+        {
+            get => this.child;
+
+            set
+            {
+                if (this.child != null)
+                {
+                    this.RemoveVisualChild(this.child);
+                }
+
+                this.child = value;
+
+                if (this.child != null)
+                {
+                    this.AddVisualChild(this.child);
+                }
+            }
+        }
+
+        protected override Size MeasureOverride(Size constraint)
+        {
+            this.child.Measure(constraint);
+            return this.child.DesiredSize;
+        }
+
+        protected override Size ArrangeOverride(Size finalSize)
+        {
+            this.child.Arrange(new Rect(new Point(0, 0), finalSize));
+            return new Size(this.child.ActualWidth, this.child.ActualHeight);
+        }
+    }
+}