Terminal.Gui/stash

diff --git a/Example/demo.cs b/Example/demo.cs
index 1413f9b..1df6170 100644
--- a/Example/demo.cs
+++ b/Example/demo.cs
@@ -90,7 +90,7 @@ static class Demo {
 			return true;
 		}
 
-		Application.MainLoop.AddTimeout (TimeSpan.FromMilliseconds (300), timer);
+		//Application.MainLoop.AddTimeout (TimeSpan.FromMilliseconds (300), timer);
 
 
 		// A little convoluted, this is because I am using this to test the
diff --git a/Terminal.Gui/Drivers/WindowsDriver.cs b/Terminal.Gui/Drivers/WindowsDriver.cs
index 229931a..a3ab2bd 100644
--- a/Terminal.Gui/Drivers/WindowsDriver.cs
+++ b/Terminal.Gui/Drivers/WindowsDriver.cs
@@ -323,6 +323,10 @@ namespace Terminal.Gui {
 				this.X = X;
 				this.Y = Y;
 			}
+
+			public override string ToString() {
+				return $"(X={X},Y={Y}";
+			}
 		};
 
 		[StructLayout(LayoutKind.Explicit, CharSet=CharSet.Unicode)]
@@ -346,6 +350,34 @@ namespace Terminal.Gui {
 			public short Top;
 			public short Right;
 			public short Bottom;
+
+			public static void MakeEmpty (ref SmallRect rect) {
+				rect.Left = -1;
+			}
+
+			public static void Update (ref SmallRect rect, short col, short row) {
+				if (rect.Left == -1) {
+					System.Diagnostics.Debugger.Log(0, "debug", $"damager From Empty {col},{row}\n");
+					rect.Left = rect.Right = col;
+					rect.Bottom = rect.Top = row;
+					return;
+				}
+				if (col >= rect.Left && col <= rect.Right && row >= rect.Top && row <= rect.Bottom)
+					return;
+				if (col < rect.Left)
+					rect.Left = col;
+				if (col > rect.Right)
+					rect.Right = col;
+				if (row < rect.Top)
+					rect.Top = row;
+				if (row > rect.Bottom)
+					rect.Bottom = row;
+				System.Diagnostics.Debugger.Log(0, "debug", $"Expanding {rect.ToString()}\n");
+			}
+
+			public override string ToString() {
+				return $"Left={Left},Top={Top},Right={Right},Bottom={Bottom}";
+			}
 		}
 
 		[DllImport ("kernel32.dll", SetLastError = true)]
@@ -410,7 +442,7 @@ namespace Terminal.Gui {
 		WindowsConsole WinConsole;
 
 		WindowsConsole.CharInfo[] OutputBuffer;
-
+		WindowsConsole.SmallRect damageRegion;
 		int cols, rows;
 
 		public override int Cols => cols;
@@ -424,6 +456,7 @@ namespace Terminal.Gui {
 			WinConsole = new WindowsConsole();
 			cols = Console.WindowWidth;
 			rows = Console.WindowHeight - 1;
+			WindowsConsole.SmallRect.MakeEmpty(ref damageRegion);
 			ResizeScreen ();
 			UpdateOffScreen ();
 		}
@@ -649,6 +682,12 @@ namespace Terminal.Gui {
 		{
 			OutputBuffer = new WindowsConsole.CharInfo[Rows * Cols];
 			Clip = new Rect (0, 0, Cols, Rows);
+			damageRegion = new WindowsConsole.SmallRect() {
+				Top = 0,
+				Left = 0,
+				Bottom = (short)Rows,
+				Right = (short) Cols
+			};
 		}
 
 		void UpdateOffScreen ()
@@ -675,6 +714,7 @@ namespace Terminal.Gui {
 			if (Clip.Contains (ccol, crow)){
 				OutputBuffer[position].Attributes = (ushort)currentAttribute;
 				OutputBuffer[position].Char.UnicodeChar = (char)rune;
+				WindowsConsole.SmallRect.Update(ref damageRegion, (short)ccol, (short)crow);
 			}
 
 			ccol++;
@@ -709,6 +749,8 @@ namespace Terminal.Gui {
 
 		public override void Refresh()
 		{
+			UpdateScreen();
+#if false
 			var bufferCoords = new WindowsConsole.Coord (){
 				X = (short)Clip.Width,
 				Y = (short)Clip.Height
@@ -723,10 +765,14 @@ namespace Terminal.Gui {
 
 			UpdateCursor();
 			WinConsole.WriteToConsole (OutputBuffer, bufferCoords, window);
+#endif
 		}
 
 		public override void UpdateScreen ()
 		{
+			if (damageRegion.Left == -1)
+				return;
+
 			var bufferCoords = new WindowsConsole.Coord (){
 				X = (short)Clip.Width,
 				Y = (short)Clip.Height
@@ -740,7 +786,9 @@ namespace Terminal.Gui {
 			};
 
 			UpdateCursor();
-			WinConsole.WriteToConsole (OutputBuffer, bufferCoords, window);
+			
+			WinConsole.WriteToConsole (OutputBuffer, bufferCoords, damageRegion);
+			WindowsConsole.SmallRect.MakeEmpty(ref damageRegion);
 		}
 
 		public override void UpdateCursor()