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diff --git a/Samples/CrowIDE/src/DesignInterface.cs b/Samples/CrowIDE/src/DesignInterface.cs
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+//
+// DesignInterface.cs
+//
+// Author:
+//       Jean-Philippe Bruyère <jp_bruyere@hotmail.com>
+//
+// Copyright (c) 2013-2017 Jean-Philippe Bruyère
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+// THE SOFTWARE.
+using System;
+using System.Threading;
+using System.Collections.Generic;
+using System.IO;
+
+
+namespace Crow.Coding
+{
+	public class DesignInterface : Interface, IValueChange
+	{
+		#region IValueChange implementation
+		/// <summary>
+		/// Raise to notify that the value of a property has changed, the binding system
+		/// rely mainly on this event. the member name may not be present in the class, this is 
+		/// used in **propertyless** bindings, this allow to raise custom named events without needing
+		/// to create an new one in the class or a new property.
+		/// </summary>
+		public event EventHandler<ValueChangeEventArgs> ValueChanged;
+		/// <summary>
+		/// Helper function to raise the value changed event
+		/// </summary>
+		public virtual void NotifyValueChanged(string MemberName, object _value)
+		{
+			//Debug.WriteLine ("Value changed: {0}->{1} = {2}", this, MemberName, _value);
+			ValueChanged.Raise(this, new ValueChangeEventArgs(MemberName, _value));
+		}
+		#endregion
+
+		public DesignInterface (vkvg.Device dev) : base(dev)
+		{
+		}
+
+		public ProjectFile ProjFile;
+
+
+
+		public override Widget CreateInstance (string path)
+		{
+			ProjectFile pi;
+
+			if (ProjFile.Project.solution.GetProjectFileFromPath (path, out pi))
+				return CreateITorFromIMLFragment (pi.Source).CreateInstance();					
+		
+			return null;
+		}
+		public override Stream GetStreamFromPath (string path)
+		{
+			ProjectFile pi;
+			if (ProjFile.Project.solution.GetProjectFileFromPath (path, out pi)) {
+				return new FileStream (pi.AbsolutePath, FileMode.Open);	
+			}
+			throw new Exception ($"In Design File not found: {path}");
+		}
+
+
+		public override bool ProcessMouseMove (int x, int y)
+		{
+			int deltaX = x - Mouse.X;
+			int deltaY = y - Mouse.Y;
+			Mouse.X = x;
+			Mouse.Y = y;
+			MouseMoveEventArgs e = new MouseMoveEventArgs (x, y, deltaX, deltaY);
+			e.Mouse = Mouse;
+
+			if (ActiveWidget != null) {
+				//TODO, ensure object is still in the graphic tree
+				//send move evt even if mouse move outside bounds
+				ActiveWidget.onMouseMove (this, e);
+				if (!ActiveWidget.IsDragged)//if active is dragged, process mouse move as it was not visible.
+					return true;
+			}
+
+			if (HoverWidget != null) {
+				
+				//check topmost graphicobject first
+				Widget tmp = HoverWidget;
+				Widget topc = null;
+				while (tmp is Widget) {
+					topc = tmp;
+					tmp = tmp.LogicalParent as Widget;
+				}
+				int idxhw = GraphicTree.IndexOf (topc);
+				if (idxhw != 0) {
+					int i = 0;
+					while (i < idxhw) {
+						if (GraphicTree [i].localLogicalParentIsNull) {
+							if (GraphicTree [i].MouseIsIn (e.Position)) {
+								while (HoverWidget != null) {
+									HoverWidget.onMouseLeave (HoverWidget, e);
+									HoverWidget = HoverWidget.LogicalParent as Widget;
+								}
+
+								GraphicTree [i].checkHoverWidget (e);
+								return true;
+							}
+						}
+						i++;
+					}
+				}
+
+				if (HoverWidget.MouseIsIn (e.Position)) {
+					if (!(HoverWidget is TemplatedControl))
+						HoverWidget.checkHoverWidget (e);
+					return true;
+				} else {
+					HoverWidget.onMouseLeave (HoverWidget, e);
+					//seek upward from last focused graph obj's
+					while (HoverWidget.LogicalParent as Widget != null) {
+						HoverWidget = HoverWidget.LogicalParent as Widget;
+						if (HoverWidget.MouseIsIn (e.Position)) {
+							HoverWidget.checkHoverWidget (e);
+							return true;
+						} else
+							HoverWidget.onMouseLeave (HoverWidget, e);
+					}
+				}
+			}
+
+			//top level graphic obj's parsing
+			lock (GraphicTree) {
+				for (int i = 0; i < GraphicTree.Count; i++) {
+					Widget g = GraphicTree [i];
+					if (g.MouseIsIn (e.Position)) {
+						if (!(HoverWidget is TemplatedControl))
+							g.checkHoverWidget (e);
+						if (g is Window)
+							PutOnTop (g);
+						return true;
+					}
+				}
+			}
+			HoverWidget = null;
+			return false;		
+		}
+	
+		protected override void processLayouting ()
+		{
+			#if MEASURE_TIME
+			layoutingMeasure.StartCycle();
+			#endif
+
+			if (Monitor.TryEnter (LayoutMutex)) {
+				DiscardQueue = new Queue<LayoutingQueueItem> ();
+				LayoutingQueueItem lqi;
+				while (LayoutingQueue.Count > 0) {
+					lqi = LayoutingQueue.Dequeue ();
+					//Console.WriteLine (lqi.ToString ());
+					#if DEBUG_LAYOUTING
+					currentLQI = lqi;
+					curLQIsTries.Add(currentLQI);
+					#endif
+					lqi.ProcessLayouting ();
+				}
+				LayoutingQueue = DiscardQueue;
+				Monitor.Exit (LayoutMutex);
+				DiscardQueue = null;
+			}
+
+			#if MEASURE_TIME
+			layoutingMeasure.StopCycle();
+			#endif
+		}
+	}
+}
+