--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Chronosv2/source/DragAndDrop/DragAdorner.cs	Tue Feb 21 17:25:44 2012 +0700
@@ -0,0 +1,143 @@
+using System.Windows;
+using System.Windows.Documents;
+using System.Windows.Media;
+using System.Windows.Shapes;
+
+namespace Chronos.Presentation.DragAndDrop
+{
+    public sealed class DragAdorner : Adorner
+    {
+        #region · Fields ·
+
+        private UIElement   child;
+        private UIElement   owner;
+        private double      XCenter;
+        private double      YCenter;
+        private double      topOffset;
+        private double      leftOffset;
+
+        #endregion
+
+        #region · Properties ·
+
+        public double LeftOffset
+        {
+            get { return this.leftOffset; }
+            set
+            {
+                this.leftOffset = (value - this.XCenter);
+                this.UpdatePosition();
+            }
+        }
+        
+        public double TopOffset
+        {
+            get { return this.topOffset; }
+            set
+            {
+                this.topOffset = (value - this.YCenter);
+                this.UpdatePosition();
+            }
+        }
+
+        #endregion
+
+        #region · Protected Properties ·
+
+        protected override int VisualChildrenCount
+        {
+            get { return 1; }
+        }
+
+        #endregion
+
+        #region · Constructors ·
+
+        public DragAdorner(UIElement owner)
+            : base(owner)
+        {
+        }
+
+        public DragAdorner(UIElement owner, UIElement adornElement, bool useVisualBrush, double opacity)
+            : base(owner)
+        {
+            this.owner  = owner;
+
+            if (useVisualBrush)
+            {
+                VisualBrush brush   = new VisualBrush(adornElement);
+                Rectangle   rect    = new Rectangle();
+
+                brush.Opacity       = opacity;
+                rect.RadiusX        = 3;
+                rect.RadiusY        = 3;
+                rect.Width          = adornElement.DesiredSize.Width;
+                rect.Height         = adornElement.DesiredSize.Height;
+
+                this.XCenter        = adornElement.DesiredSize.Width / 2;
+                this.YCenter        = adornElement.DesiredSize.Height / 2;
+
+                rect.Fill = brush;
+
+                this.child = rect;
+            }
+            else
+            {
+                this.child = adornElement;
+            }
+        }
+
+        #endregion
+
+        #region · Methods ·
+
+        public override GeneralTransform GetDesiredTransform(GeneralTransform transform)
+        {
+            GeneralTransformGroup result = new GeneralTransformGroup();
+
+            result.Children.Add(base.GetDesiredTransform(transform));
+            result.Children.Add(new TranslateTransform(this.leftOffset, this.topOffset));
+
+            return result;
+        }
+
+        #endregion
+
+        #region · Protected Methods ·
+
+        protected override Visual GetVisualChild(int index)
+        {
+            return this.child;
+        }
+
+        protected override Size MeasureOverride(Size finalSize)
+        {
+            this.child.Measure(finalSize);
+            
+            return this.child.DesiredSize;
+        }
+
+        protected override Size ArrangeOverride(Size finalSize)
+        {
+            this.child.Arrange(new Rect(this.child.DesiredSize));
+
+            return finalSize;
+        }
+
+        #endregion
+
+        #region · Private Methods ·
+
+        private void UpdatePosition()
+        {
+            AdornerLayer adorner = (AdornerLayer)this.Parent;
+
+            if (adorner != null)
+            {
+                adorner.Update(this.AdornedElement);
+            }
+        }
+
+        #endregion
+    }
+}