From 5c91d515f8e05171ff94323c49831f080a11adec Mon Sep 17 00:00:00 2001
From: =?utf8?q?Jean-Philippe=20Bruy=C3=A8re?= <jp_bruyere@hotmail.com>
Date: Mon, 12 Jul 2021 08:45:51 +0200
Subject: [PATCH] replace FastEnum with Enums.NET for flags handling, Bubbling
 event as Flag, requiredLayouting, MAXLAYOUTINGTRY=>30

---
 Crow.sln                                      |   4 -
 Crow/Crow.csproj                              |   3 +-
 Crow/Default.style                            |  18 +-
 Crow/Icons/pin.svg                            |   6 +
 Crow/Icons/unpin.svg                          |   9 +
 Crow/Templates/DirectoryView.template         |   2 +-
 Crow/Templates/DockWindow.template            |  35 ++-
 Crow/Templates/MenuItem.template              |   2 +-
 Crow/Templates/MessageBox.template            |  11 +-
 Crow/Templates/ToolWindow.template            |  11 +-
 Crow/Templates/Window.template                |  23 +-
 Crow/Templates/WindowButton.template          |   9 +
 Crow/src/Colors.cs                            |   6 +-
 Crow/src/Configuration.cs                     |  15 +
 Crow/src/DebugUtils/DbgEvent.cs               |  31 +-
 Crow/src/DebugUtils/DbgEvtType.cs             |   2 +
 Crow/src/DebugUtils/DbgLayoutEvent.cs         |  29 +-
 Crow/src/DebugUtils/DbgWidgetEvent.cs         |   7 +
 Crow/src/DebugUtils/DbgWidgetRecord.cs        |   6 +-
 Crow/src/DebugUtils/DebugLogger.cs            |  50 ++-
 Crow/src/Fill/SolidColor.cs                   |  25 +-
 Crow/src/Font.cs                              |   4 +-
 Crow/src/IML/CompilerServices.cs              |  88 +++---
 Crow/src/IML/Instantiator.cs                  |   2 -
 Crow/src/Input/MouseEventArgs.cs              |  19 +-
 Crow/src/Interface.cs                         | 100 +++---
 Crow/src/ItemTemplate.cs                      |  21 +-
 Crow/src/LayoutingQueueItem.cs                |  88 +++---
 Crow/src/ObservableList.cs                    |   8 +-
 Crow/src/Widgets/ColorPicker.cs               |   2 +-
 Crow/src/Widgets/DockStack.cs                 |  50 +--
 Crow/src/Widgets/DockWindow.cs                | 138 ++++++---
 Crow/src/Widgets/Expandable.cs                |   9 +-
 Crow/src/Widgets/GenericStack.cs              | 160 +++++-----
 Crow/src/Widgets/Group.cs                     |  40 ++-
 Crow/src/Widgets/GroupBase.cs                 |   2 +-
 Crow/src/Widgets/ILayoutable.cs               |   1 +
 Crow/src/Widgets/Label.cs                     |   2 +-
 Crow/src/Widgets/PrivateContainer.cs          |  33 +-
 Crow/src/Widgets/ScrollBar.cs                 |   7 +-
 Crow/src/Widgets/TableRow.cs                  |  13 +-
 Crow/src/Widgets/TemplatedContainer.cs        |   1 +
 Crow/src/Widgets/TemplatedControl.cs          |   5 +-
 Crow/src/Widgets/TemplatedGroup.cs            |  11 +-
 Crow/src/Widgets/Widget.cs                    | 212 ++++++++-----
 Crow/src/Widgets/Window.cs                    | 285 ++++++++++++------
 Crow/src/Widgets/Wrapper.cs                   | 124 ++++----
 .../DebugLogAnalyzer/src/DebugInterface.cs    |  10 +-
 .../src/DebugInterfaceWidget.cs               |   2 +-
 .../DebugLogAnalyzer/ui/DbgEventView.template |   1 +
 .../DebugLogAnalyzer/ui/DbgEvtTooltip.crow    |   1 +
 Samples/ShowCase/ui/showcase.crow             |   2 +-
 Samples/common/src/Editor.cs                  |   4 +-
 Samples/common/src/SampleBase.cs              |   4 +-
 Samples/common/ui/Interfaces/Divers/0.crow    |   2 +-
 .../common/ui/Interfaces/Divers/color3.crow   |   7 +
 .../Divers/fitListWithStretchedItems.crow     |   1 -
 .../ui/Interfaces/Divers/testDisable.crow     |   4 +-
 .../common/ui/Interfaces/Divers/windows.crow  |   1 +
 .../Experimental/colorPicktest.crow           |  23 ++
 .../Experimental/colorPicktest2.crow          |  19 ++
 .../Experimental/multiColorPick2.crow         |   2 +-
 .../ui/Interfaces/Experimental/tabView1.crow  |   4 +-
 .../ui/Interfaces/Stack/StretchedInFit1.crow  |  26 ++
 .../Interfaces/Stack/StretchedInFit3.1.crow   |  15 +
 .../Interfaces/Stack/StretchedInFit3.2.crow   |   7 +
 .../Interfaces/Stack/StretchedInFit3.3.crow   |  17 ++
 .../Interfaces/Stack/StretchedInFit3.4.crow   |   4 +
 .../Interfaces/Stack/StretchedInFit3.5.crow   |  17 ++
 .../ui/Interfaces/Stack/StretchedInFit3.crow  |   8 +-
 .../ui/Interfaces/Stack/StretchedInFit5.crow  |   8 +-
 .../TemplatedControl/testItemTemplateTag.crow |   4 +-
 Samples/common/ui/Interfaces/colorPicker.tmp  |   2 +-
 .../common/ui/templates/ColorPicker.template  |   2 +-
 Samples/common/ui/templates/testitems.crow    |  23 ++
 Samples/dockableWindows/dockableWindows.cs    |   1 +
 Samples/dockableWindows/ui/dock.style         |   3 +
 Samples/dockableWindows/ui/dockWin.template   |  35 ++-
 78 files changed, 1297 insertions(+), 691 deletions(-)
 create mode 100644 Crow/Icons/pin.svg
 create mode 100644 Crow/Icons/unpin.svg
 create mode 100644 Crow/Templates/WindowButton.template
 create mode 100644 Samples/common/ui/Interfaces/Divers/color3.crow
 create mode 100644 Samples/common/ui/Interfaces/Divers/windows.crow
 create mode 100644 Samples/common/ui/Interfaces/Experimental/colorPicktest.crow
 create mode 100644 Samples/common/ui/Interfaces/Experimental/colorPicktest2.crow
 create mode 100644 Samples/common/ui/Interfaces/Stack/StretchedInFit1.crow
 create mode 100644 Samples/common/ui/Interfaces/Stack/StretchedInFit3.1.crow
 create mode 100644 Samples/common/ui/Interfaces/Stack/StretchedInFit3.2.crow
 create mode 100644 Samples/common/ui/Interfaces/Stack/StretchedInFit3.3.crow
 create mode 100644 Samples/common/ui/Interfaces/Stack/StretchedInFit3.4.crow
 create mode 100644 Samples/common/ui/Interfaces/Stack/StretchedInFit3.5.crow
 create mode 100644 Samples/common/ui/templates/testitems.crow

diff --git a/Crow.sln b/Crow.sln
index 7db03c15..0e50f247 100644
--- a/Crow.sln
+++ b/Crow.sln
@@ -10,8 +10,6 @@ Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "global", "global", "{728545
 EndProject
 Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Crow", "Crow\Crow.csproj", "{C2980F9B-4798-4C05-99E2-E174810F7C7B}"
 EndProject
-Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "CrowDbgShared", "CrowDbgShared\CrowDbgShared.csproj", "{91F1CE07-EECE-4F1D-A3EE-7239B563654A}"
-EndProject
 Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "Samples", "Samples", "{B2C7855A-2878-47FD-AD32-9A83DB4AB8C6}"
 	ProjectSection(SolutionItems) = preProject
 		Samples\Directory.Build.props = Samples\Directory.Build.props
@@ -57,8 +55,6 @@ Global
 		{56329D48-D382-4850-93DE-59C453894E8A}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{56329D48-D382-4850-93DE-59C453894E8A}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{56329D48-D382-4850-93DE-59C453894E8A}.Release|Any CPU.Build.0 = Release|Any CPU
-		{91F1CE07-EECE-4F1D-A3EE-7239B563654A}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
-		{91F1CE07-EECE-4F1D-A3EE-7239B563654A}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{0CC6DFAB-2E4A-4786-976C-89053D5EA6A2}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
 		{0CC6DFAB-2E4A-4786-976C-89053D5EA6A2}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{0CC6DFAB-2E4A-4786-976C-89053D5EA6A2}.Release|Any CPU.ActiveCfg = Release|Any CPU
diff --git a/Crow/Crow.csproj b/Crow/Crow.csproj
index d5d50114..972e22f1 100644
--- a/Crow/Crow.csproj
+++ b/Crow/Crow.csproj
@@ -39,7 +39,8 @@
 		<PackageReference Include="System.Reflection.Emit.Lightweight" Version="4.6.0" />
 	</ItemGroup>
 	<ItemGroup>
-		<PackageReference Include="FastEnum" Version="1.5.3" />
+		<!--<PackageReference Include="FastEnum" Version="1.5.3" />-->
+		<PackageReference Include="Enums.NET" Version="4.0.0" />		
 		<PackageReference Include="glfw-sharp" Version="$(GlfwSharpVersion)" />
 	</ItemGroup>
 
diff --git a/Crow/Default.style b/Crow/Default.style
index 5c88c062..80131bce 100644
--- a/Crow/Default.style
+++ b/Crow/Default.style
@@ -134,6 +134,7 @@ MessageBox {
 	//MinimumSize = "200,120";
 	AlwaysOnTop = "true";
 	Resizable = "false";
+	AllowedStates = "Normal";
 }
 Slider {
 	Foreground = "Grey";
@@ -166,12 +167,15 @@ WindowIconBorder {
 	Foreground="Transparent";
 	Height="12";
 	Width="12";
-	MouseEnter="{Foreground=White}";
+	MouseEnter="{Foreground=Grey}";
 	MouseLeave="{Foreground=Transparent}";
+	MouseDown="{Background=${ControlHighlight}}";
+	MouseUp="{Background=Transparent}";
 }
 ToolWindow {
 	Caption = "Window";
 	Template = "#Crow.ToolWindow.template";
+	AllowedStates = "Normal";
 	Focusable = "true";
 	MinimumSize="50,50";
 	Width = "150";
@@ -183,7 +187,8 @@ DockStack {
 	AllowDrop = "true";
 	AllowedDropTypes = "Crow.DockWindow";
 }
-DockWindow {	
+DockWindow {
+	AllowedStates = "Normal";
 	Focusable = "true";
 	AllowDrag = "true";
 	AllowDrop="true";
@@ -321,8 +326,9 @@ MessageBox, Popper, Slider, Spinner, TextBox, NumericControl {
 	Background = "${ControlBackground}";
 	CornerRadius = "${ControlCornerRadius}";
 	Margin="0";
-	BubbleMouseEvent="false";
+	BubbleMouseEvent="MouseWheel|Keyboard";
 }
-TemplatedControl, GenericStack {
-	CacheEnabled="true";
-}
\ No newline at end of file
+
+//TemplatedControl, GenericStack {
+//	CacheEnabled="true";
+//}
\ No newline at end of file
diff --git a/Crow/Icons/pin.svg b/Crow/Icons/pin.svg
new file mode 100644
index 00000000..b36340b8
--- /dev/null
+++ b/Crow/Icons/pin.svg
@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Generated by IcoMoon.io -->
+<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">
+<svg version="1.1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" width="16" height="16" viewBox="0 0 16 16">
+<path fill="#dddddd" d="M11 6.5v-5.5h1v-1h-8v1h1v5.5c0 0-2 1.5-2 3.5 0 0.5 1.9 0.7 4 0.7v2.2c0 0.7 0.2 1.4 0.5 2.1l0.5 1 0.5-1c0.3-0.6 0.5-1.3 0.5-2.1v-2.2c2.1 0 4-0.3 4-0.7 0-2-2-3.5-2-3.5zM7 6.6c0 0-0.5 0.3-1.6 1.4-1 1-1.5 1.9-1.5 1.9s0.1-1 0.8-1.9c0.9-1.1 1.3-1.4 1.3-1.4v-5.6h1v5.6z"></path>
+</svg>
diff --git a/Crow/Icons/unpin.svg b/Crow/Icons/unpin.svg
new file mode 100644
index 00000000..8396017f
--- /dev/null
+++ b/Crow/Icons/unpin.svg
@@ -0,0 +1,9 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Generated by IcoMoon.io -->
+<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">
+<svg version="1.1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" width="16" height="16" viewBox="0 0 16 16">
+  <path
+     fill="#dddddd"
+     d="M 9.8735488,10.133961 13.560108,6.0523834 14.302213,6.7226674 14.972497,5.9805624 9.0356558,0.61829343 8.3653726,1.3603984 9.1074778,2.0306824 5.420918,6.1122604 c 0,0 -2.4896355,-0.22741 -3.8302027,1.2568 -0.3351418,0.371053 0.9408011,1.793013 2.4992218,3.2006076 l -1.4746239,1.632631 c -0.4691985,0.519474 -0.789976,1.173004 -1.036543,1.893563 l -0.299231,1.077247 1.0413361,-0.406964 C 2.945677,14.521967 3.5632965,14.13655 4.0995234,13.542866 l 1.4746238,-1.632631 c 1.5584207,1.407596 3.1695056,2.458503 3.4376186,2.161661 1.3405672,-1.48421 0.861783,-3.937935 0.861783,-3.937935 z M 6.8380997,7.5270374 c 0,0 -0.5721376,-0.11251 -2.1257651,-0.03351 -1.4123886,0.07182 -2.3866964,0.404575 -2.3866964,0.404575 0,0 0.7444941,-0.675077 1.8672229,-0.873773 1.4052065,-0.21306 1.9031336,-0.167578 1.9031336,-0.167578 l 3.7535881,-4.155786 0.7421052,0.670284 z"
+     id="path2" />
+</svg>
diff --git a/Crow/Templates/DirectoryView.template b/Crow/Templates/DirectoryView.template
index 98094c90..7a157bdd 100644
--- a/Crow/Templates/DirectoryView.template
+++ b/Crow/Templates/DirectoryView.template
@@ -15,7 +15,7 @@
 		<ListItem
 				Selected="{/exp.Background=${ControlHighlight}}"
 				Unselected="{/exp.Background=Transparent}">
-			<Expandable Name="exp" Caption="{Name}" MouseDoubleClick="/onClickForExpand" BubbleMouseEvent="true">
+			<Expandable Name="exp" Caption="{Name}" MouseDoubleClick="/onClickForExpand" >
 				<Template>
 					<VerticalStack>
 						<Border CornerRadius="2" Margin="0" Height="Fit" MouseDoubleClick="./onClickForExpand"
diff --git a/Crow/Templates/DockWindow.template b/Crow/Templates/DockWindow.template
index 7f6183e3..9e8e623a 100644
--- a/Crow/Templates/DockWindow.template
+++ b/Crow/Templates/DockWindow.template
@@ -5,23 +5,36 @@
 		<HorizontalStack Visible="{./IsDocked}" Height="Fit" Margin="1" Background="vgradient|0:0.3,0.5,0.8,0.9|1:0.1,0.1,0.1,0.9">
 			<Label  Text="{./CurDir}" TextAlignment="Left" Width="Stretched"
 					 Foreground="White" />
-			<Border CornerRadius="6" BorderWidth="1" Foreground="Transparent"  Height="10" Width="10"
-				MouseEnter="{Foreground=White}" MouseLeave="{Foreground=Transparent}">
-				<Image Focusable="true" Name="Image" Margin="0" Path="#Crow.Icons.exit2.svg"
-					 MouseClick="./onQuitPress"/>
-			</Border>
+			<ListBox Data="{./DockCommands}" Fit="true">
+				<Template>
+					<HorizontalStack Name="ItemsContainer" />
+				</Template>
+				<ItemTemplate Path="#Crow.WindowButton.template"/>
+			</ListBox>
+			<ListBox Data="{./Commands}" Fit="true">
+				<Template>
+					<HorizontalStack Name="ItemsContainer" />
+				</Template>
+				<ItemTemplate Path="#Crow.WindowButton.template"/>
+			</ListBox>
 		</HorizontalStack>
 		<HorizontalStack Background="vgradient|0:0.5,0.6,0.5,0.5|1:0.2,0.3,0.3,0.7"
 				Name="hs" Margin="0" Spacing="0" Height="Fit" Visible="{./IsFloating}">
 			<Widget Width="5"/>			
 			<Image Margin="1" Width="10" Height="10" Path="{./Icon}"/>
 			<Label Width="Stretched" Foreground="White" Margin="1" TextAlignment="Left" Text="{./CurDir}" />
-			<Border CornerRadius="6" BorderWidth="1" Foreground="Transparent"  Height="10" Width="10"
-				MouseEnter="{Foreground=White}" MouseLeave="{Foreground=Transparent}">
-				<Image Focusable="true" Name="Image" Margin="0" Path="#Crow.Icons.exit2.svg"
-					 MouseClick="./onQuitPress"/>
-			</Border>
-			<Widget Width="5"/>
+			<ListBox Data="{./DockCommands}" Fit="true">
+				<Template>
+					<HorizontalStack Name="ItemsContainer" />
+				</Template>
+				<ItemTemplate Path="#Crow.WindowButton.template"/>
+			</ListBox>
+			<ListBox Data="{./Commands}" Fit="true">
+				<Template>
+					<HorizontalStack Name="ItemsContainer" />
+				</Template>
+				<ItemTemplate Path="#Crow.WindowButton.template"/>
+			</ListBox>
 		</HorizontalStack>
 		<Container Name="Content" MinimumSize="50,50"/>
 	</VerticalStack>
diff --git a/Crow/Templates/MenuItem.template b/Crow/Templates/MenuItem.template
index d712d3fb..4945b009 100644
--- a/Crow/Templates/MenuItem.template
+++ b/Crow/Templates/MenuItem.template
@@ -1,7 +1,7 @@
 <?xml version="1.0"?>
 <ListItem>
 	<Popper Font="{./Font}" Caption="{./Caption}"  Background="{./Background}" PopDirection="{./PopDirection}"
-		Foreground = "{./Foreground}" BubbleMouseEvent="true"
+		Foreground = "{./Foreground}" BubbleMouseEvent="All"
 		IsPopped="{²./IsOpened}" PopWidth="{./PopWidth}" PopHeight="{./PopHeight}">
 		<Template>
 			
diff --git a/Crow/Templates/MessageBox.template b/Crow/Templates/MessageBox.template
index 3cccc4d2..2598e57a 100644
--- a/Crow/Templates/MessageBox.template
+++ b/Crow/Templates/MessageBox.template
@@ -6,11 +6,12 @@
 			<Widget Width="5" />
 			<Image Margin="1" Width="12" Height="12" Path="{./Icon}"/>
 			<Label Name="MoveHandle" Width="Stretched" Foreground="${WindowTitleBarForeground" Margin="2" TextAlignment="Center" Text="{./Caption}" />
-			<Border CornerRadius="3" BorderWidth="1" Foreground="Transparent"  Height="12" Width="12"
-				MouseEnter="{Foreground=White}" MouseLeave="{Foreground=Transparent}">
-				<Image Focusable="true" Name="Image" Path="#Crow.Icons.exit2.svg"
-					 MouseClick="./onQuitPress"/>
-			</Border>
+			<ListBox Data="{./Commands}" Fit="true">
+				<Template>
+					<HorizontalStack Name="ItemsContainer" />
+				</Template>
+				<ItemTemplate Path="#Crow.WindowButton.template"/>
+			</ListBox>
 			<Widget Width="5" />
 		</HorizontalStack>	
 		<HorizontalStack Margin="5" >
diff --git a/Crow/Templates/ToolWindow.template b/Crow/Templates/ToolWindow.template
index b0af1c5d..40ac987b 100644
--- a/Crow/Templates/ToolWindow.template
+++ b/Crow/Templates/ToolWindow.template
@@ -7,11 +7,12 @@
 				<Widget Width="5"/>
 				<Image Margin="1" Width="12" Height="12" Path="{./Icon}"/>
 				<Label Width="Stretched" Foreground="{./TitleBarForeground}" Margin="1" TextAlignment="Center" Text="{./Caption}" />
-				<Border CornerRadius="6" BorderWidth="1" Foreground="Transparent"  Height="12" Width="12"
-					MouseEnter="{Foreground=White}" MouseLeave="{Foreground=Transparent}">
-					<Image Focusable="true" Name="Image" Margin="0" Width="Stretched" Height="Stretched" Path="#Crow.Icons.exit2.svg"
-						 MouseClick="./onQuitPress"/>
-				</Border>
+				<ListBox Data="{./Commands}" Fit="true">
+					<Template>
+						<HorizontalStack Name="ItemsContainer" />
+					</Template>
+					<ItemTemplate Path="#Crow.WindowButton.template"/>
+				</ListBox>
 				<Widget Width="5"/>
 			</HorizontalStack>
 		<Container Name="Content" MinimumSize="50,50"/>
diff --git a/Crow/Templates/Window.template b/Crow/Templates/Window.template
index a1de29de..9ea0cd98 100644
--- a/Crow/Templates/Window.template
+++ b/Crow/Templates/Window.template
@@ -5,23 +5,12 @@
 			<Widget Width="5"/>
 			<Image Margin="1" Width="12" Height="12" Path="{./Icon}"/>
 			<Label Name="MoveHandle" Width="Stretched" Foreground="${WindowTitleBarForeground" Margin="2" TextAlignment="Center" Text="{./Caption}" />
-			<Border Visible="{./ShowMinimize}" Style="WindowIconBorder">
-				<Image Focusable="true" Path="#Crow.Icons.minimize.svg"
-					 MouseClick="./onMinimized"/>
-			</Border>
-			<Border Visible="{./ShowNormal}" Style="WindowIconBorder">
-				<Image Focusable="true" Path="#Crow.Icons.normalize.svg"
-					 MouseClick="./onUnmaximized"/>
-			</Border>
-			<Border Visible="{./ShowMaximize}" Style="WindowIconBorder">
-				<Image Focusable="true" Path="#Crow.Icons.maximize.svg"
-					 MouseClick="./onMaximized"/>
-			</Border>
-			<Border BorderWidth="1" Style="WindowIconBorder">
-				<Image Focusable="true" Path="#Crow.Icons.exit2.svg"
-					 MouseClick="./onQuitPress"/>
-			</Border>
-			<Widget Width="5"/>
+			<ListBox Data="{./Commands}" Fit="true">
+				<Template>
+					<HorizontalStack Name="ItemsContainer" />
+				</Template>
+				<ItemTemplate Path="#Crow.WindowButton.template"/>
+			</ListBox>
 		</HorizontalStack>
 		<Container Name="Content" MinimumSize="0,0" />
 	</VerticalStack>
diff --git a/Crow/Templates/WindowButton.template b/Crow/Templates/WindowButton.template
new file mode 100644
index 00000000..19ce8f90
--- /dev/null
+++ b/Crow/Templates/WindowButton.template
@@ -0,0 +1,9 @@
+<?xml version="1.0"?>
+<Button Command="{}" MinimumSize="0,0" >
+	<Template>
+		<Border Style="WindowIconBorder" IsVisible="{./IsEnabled}">
+			<Image Path="{./Icon}" Tooltip="{./Caption}"/>
+		</Border>							
+	</Template>
+</Button>
+
diff --git a/Crow/src/Colors.cs b/Crow/src/Colors.cs
index c1152031..323cba2e 100644
--- a/Crow/src/Colors.cs
+++ b/Crow/src/Colors.cs
@@ -5,7 +5,7 @@
 using System;
 using System.Collections.Generic;
 using System.Linq;
-using FastEnumUtility;
+//using FastEnumUtility;
 
 namespace Crow
 {
@@ -332,7 +332,7 @@ namespace Crow
 			=> value.GetHashCode ();
 
 		public override string ToString()
-			=> FastEnum.IsDefined<Colors> (value) ? FastEnum.GetName((Colors)value) : HtmlCode;
+			=> EnumsNET.Enums.IsValid<Colors> ((Colors)value) ? EnumsNET.Enums.GetName((Colors)value) : HtmlCode;
 			
 		public static Color FromIml (string iml)
 		{
@@ -357,7 +357,7 @@ namespace Crow
 				new Color (0xff + (UInt32.Parse (s.AsSpan ().Slice (1), System.Globalization.NumberStyles.HexNumber)<<8))
 				: new Color (UInt32.Parse (s.AsSpan().Slice (1), System.Globalization.NumberStyles.HexNumber)) :
 				char.IsDigit(s[0]) ? FromIml (s) :
-				FastEnum.TryParse<Colors> (s, out Colors cc) ? new Color(cc) :
+				EnumsNET.Enums.TryParse<Colors> (s, out Colors cc) ? new Color(cc) :
 				throw new Exception ("Unknown color name: " + s);
 
 		public static Color FromHSV (double _h, double _v = 0xff, double _s = 0xff, double _alpha = 0xff) {
diff --git a/Crow/src/Configuration.cs b/Crow/src/Configuration.cs
index a04a80e4..55bbeefb 100644
--- a/Crow/src/Configuration.cs
+++ b/Crow/src/Configuration.cs
@@ -85,6 +85,13 @@ namespace Crow
 			}
 			startSavingThread ();
 		}
+		/// <summary>
+		/// Create readonly configuration
+		/// </summary>
+		/// <param name="defaultConf"></param>
+		public Configuration (Stream defaultConf = null) {			
+			load (defaultConf);
+		}		
 
 		static Configuration ()
 		{
@@ -146,6 +153,14 @@ namespace Crow
 			return !items.ContainsKey (key) ? default(T) : items [key].GetValue<T> ();
 		}
 		/// <summary>
+		/// retrive the value of the configuration key given in parameter
+		/// </summary>
+		/// <param name="key">option name</param>
+		public T Get<T>(string key, T defaultValue)
+		{
+			return !items.ContainsKey (key) ? defaultValue : items [key].GetValue<T> ();
+		}		
+		/// <summary>
 		/// store the value of the configuration key given in parameter
 		/// </summary>
 		/// <param name="key">option name</param>
diff --git a/Crow/src/DebugUtils/DbgEvent.cs b/Crow/src/DebugUtils/DbgEvent.cs
index c43cc15a..1b6144f2 100644
--- a/Crow/src/DebugUtils/DbgEvent.cs
+++ b/Crow/src/DebugUtils/DbgEvent.cs
@@ -14,6 +14,7 @@ namespace Crow.DebugLogger
 		public int threadId;
 		public DbgEvtType type;
 		public DbgEvtType Category => type & DbgEvtType.All;
+		public string Message;
 		public DbgEvent parentEvent;
 		public bool HasChildEvents => Events != null && Events.Count > 0;
 		public override long Duration => end - begin;
@@ -22,6 +23,7 @@ namespace Crow.DebugLogger
 		public double EndMS => Math.Round ((double)end / Stopwatch.Frequency, 6);
 		public virtual bool IsWidgetEvent => false;
 		public virtual bool IsLayoutEvent => false;
+		public bool HasMessage => !string.IsNullOrEmpty(Message);
 
 		public void AddEvent (DbgEvent evt)
 		{
@@ -33,21 +35,22 @@ namespace Crow.DebugLogger
 		}
 
 		public DbgEvent () { }
-		public DbgEvent (long timeStamp, DbgEvtType evt)
+		public DbgEvent (long timeStamp, DbgEvtType evt, string message = null)
 		{
 			type = evt;
 			begin = timeStamp;
 			end = timeStamp;
 			threadId = Thread.CurrentThread.ManagedThreadId;
+			Message = message;
 		}
 
 		public static DbgEvent Parse (string str)
 		{
 			if (str == null)
 				return null;
-			string [] tmp = str.Trim ().Split (';');
+			string [] tmp = str.Trim ().Split (';', StringSplitOptions.None);
 
-			DbgEvtType evtType = (DbgEvtType)Enum.Parse (typeof (DbgEvtType), tmp [3]);
+			DbgEvtType evtType = (DbgEvtType)Enum.Parse (typeof (DbgEvtType), tmp [3]);			
 
 			if (evtType.HasFlag (DbgEvtType.Widget)) {
 				if (evtType.HasFlag (DbgEvtType.Layouting))
@@ -56,27 +59,30 @@ namespace Crow.DebugLogger
 						end = long.Parse (tmp [1]),
 						threadId = int.Parse (tmp [2]),
 						type = evtType,
-						InstanceIndex = int.Parse (tmp [4]),
-						layouting = (LayoutingType)Enum.Parse (typeof (LayoutingType), tmp [5]),
+						Message = tmp[4],
+						InstanceIndex = int.Parse (tmp [5]),
+						layouting = (LayoutingType)Enum.Parse (typeof (LayoutingType), tmp [6]),
 						result = evtType == DbgEvtType.GOProcessLayouting ?
-							(LayoutingQueueItem.Result)Enum.Parse (typeof (LayoutingQueueItem.Result), tmp [6])
+							(LayoutingQueueItem.Result)Enum.Parse (typeof (LayoutingQueueItem.Result), tmp [7])
 							: LayoutingQueueItem.Result.Unknown,
-						OldSlot = Rectangle.Parse (tmp [7]),
-						NewSlot = Rectangle.Parse (tmp [8]),
+						OldSlot = Rectangle.Parse (tmp [8]),
+						NewSlot = Rectangle.Parse (tmp [9]),
 					};
-				return (tmp.Length < 5) ?
+				return (tmp.Length < 6) ?
  							new DbgWidgetEvent () {
 								begin = long.Parse (tmp [0]),
 								end = long.Parse (tmp [1]),
 								threadId = int.Parse (tmp [2]),
 								type = evtType,
+								Message = tmp[4],
 								InstanceIndex = -1,
 							} : new DbgWidgetEvent () {
 								begin = long.Parse (tmp [0]),
 								end = long.Parse (tmp [1]),
 								threadId = int.Parse (tmp [2]),
 								type = evtType,
-								InstanceIndex = int.Parse (tmp [4]),
+								Message = tmp[4],
+								InstanceIndex = int.Parse (tmp [5]),
 							};
 			}
 			return new DbgEvent () {
@@ -84,12 +90,13 @@ namespace Crow.DebugLogger
 				end = long.Parse (tmp [1]),
 				threadId = int.Parse (tmp [2]),
 				type = evtType,
+				Message = tmp[4]
 			};
 		}
 		public virtual string Print ()
-			=> $"{begin,10}:{threadId,-2}:{type,-20}:";
+			=> $"{begin,10}:{threadId,-2}:{type,-20}:{Message}";
 		public override string ToString ()
-			=> $"{begin};{end};{threadId};{type}";
+			=> $"{begin};{end};{threadId};{type};{Message}";
 		public virtual Color Color {
 			get {
 				switch (type) {
diff --git a/Crow/src/DebugUtils/DbgEvtType.cs b/Crow/src/DebugUtils/DbgEvtType.cs
index b7f16acb..be7f66dd 100644
--- a/Crow/src/DebugUtils/DbgEvtType.cs
+++ b/Crow/src/DebugUtils/DbgEvtType.cs
@@ -57,6 +57,8 @@ namespace Crow
 		GORegisterForRedraw		 		= Widget | 0x0C,
 		GOComputeChildrenPositions 		= Widget | 0x0D,
 		GOOnChildLayoutChange	 		= Widget | 0x0E,
+		GOAdjustStretchedGo		 		= Widget | 0x0F,
+		GOSetProperty			 		= Widget | 0x10,
 
 		AlreadyDisposed					= Widget | Dispose | Error | 0x01,
 		DisposedByGC					= Widget | Dispose | Error | 0x02,
diff --git a/Crow/src/DebugUtils/DbgLayoutEvent.cs b/Crow/src/DebugUtils/DbgLayoutEvent.cs
index 4444fe3d..750ac31a 100644
--- a/Crow/src/DebugUtils/DbgLayoutEvent.cs
+++ b/Crow/src/DebugUtils/DbgLayoutEvent.cs
@@ -34,20 +34,21 @@ namespace Crow.DebugLogger
 			=> $"{base.ToString ()};{layouting};{result};{OldSlot};{NewSlot}";
 		public override Color Color {
 			get {
-			if (type == DbgEvtType.GORegisterLayouting)
-				return Colors.GreenYellow;
-			if (type == DbgEvtType.GOProcessLayoutingWithNoParent)
-				return Colors.DarkRed;
-			switch (result) {
-			case LayoutingQueueItem.Result.Success:
-				return Colors.Green;
-			case LayoutingQueueItem.Result.Deleted:
-				return Colors.Red;
-			case LayoutingQueueItem.Result.Discarded:
-				return Colors.OrangeRed;
-			default:
-				return Colors.Orange;
-			}					}
+				if (type == DbgEvtType.GORegisterLayouting)
+					return Colors.GreenYellow;
+				if (type == DbgEvtType.GOProcessLayoutingWithNoParent)
+					return Colors.DarkRed;
+				switch (result) {
+				case LayoutingQueueItem.Result.Success:
+					return Colors.Green;
+				case LayoutingQueueItem.Result.Deleted:
+					return Colors.Red;
+				case LayoutingQueueItem.Result.Discarded:
+					return Colors.OrangeRed;
+				default:
+					return Colors.Orange;
+				}
+			}
 		}			
 	}
 }
\ No newline at end of file
diff --git a/Crow/src/DebugUtils/DbgWidgetEvent.cs b/Crow/src/DebugUtils/DbgWidgetEvent.cs
index 9b9a2b15..383fc94a 100644
--- a/Crow/src/DebugUtils/DbgWidgetEvent.cs
+++ b/Crow/src/DebugUtils/DbgWidgetEvent.cs
@@ -23,10 +23,17 @@ namespace Crow.DebugLogger
 		public override Color Color {
 			get {
 				switch (type) {
+				case DbgEvtType.GOSetProperty:
+					return Colors.Lime;
 				case DbgEvtType.GOMeasure:
+					return Colors.Pink;
 				case DbgEvtType.GOSearchLargestChild:
 				case DbgEvtType.GOSearchTallestChild:
 					return Colors.HotPink;
+				case DbgEvtType.GOOnChildLayoutChange:
+					return Colors.DarkViolet;
+				case DbgEvtType.GOAdjustStretchedGo:
+					return Colors.PaleVioletRed;
 				case DbgEvtType.GOClassCreation:
 					return Colors.DarkSlateGrey;
 				case DbgEvtType.GOInitialization:
diff --git a/Crow/src/DebugUtils/DbgWidgetRecord.cs b/Crow/src/DebugUtils/DbgWidgetRecord.cs
index 2fde7377..6b0bfb5f 100644
--- a/Crow/src/DebugUtils/DbgWidgetRecord.cs
+++ b/Crow/src/DebugUtils/DbgWidgetRecord.cs
@@ -23,9 +23,7 @@ namespace Crow.DebugLogger
 		//useful to track events for obj shown later, not on start
 		public int InstanceIndex;
 		public int yIndex;//index in parenting, the whole main graphic tree is one continuous suite
-		public int xLevel;//depth
-		public String Width;
-		public String Height;
+		public int xLevel;//depth		
 
 		public static DbgWidgetRecord Parse (string str)
 		{
@@ -37,8 +35,6 @@ namespace Crow.DebugLogger
 			g.InstanceIndex = int.Parse (tmp [1]);
 			g.yIndex = int.Parse (tmp [2]);
 			g.xLevel = int.Parse (tmp [3]);
-			g.Width = tmp [4];
-			g.Height = tmp [5];
 			return g;
 		}
 
diff --git a/Crow/src/DebugUtils/DebugLogger.cs b/Crow/src/DebugUtils/DebugLogger.cs
index e048008f..b773b990 100644
--- a/Crow/src/DebugUtils/DebugLogger.cs
+++ b/Crow/src/DebugUtils/DebugLogger.cs
@@ -69,7 +69,24 @@ namespace Crow
 			}
 #endif
 		}
-
+[Conditional ("DEBUG_LOG")]
+		public static void SetMsg (DbgEvtType evtType, string message)
+		{
+#if DEBUG_LOG
+			if (!logevt (evtType))
+				return;
+lock (logMutex) {
+				chrono.Stop ();
+				if (!startedEvents.ContainsKey (Thread.CurrentThread.ManagedThreadId))
+					throw new Exception ("Current thread has no event started");
+				DbgEvent e = startedEvents [Thread.CurrentThread.ManagedThreadId].Peek ();
+				if (e.type != evtType)
+					throw new Exception ($"Begin/end event logging mismatch: {e.type}/{evtType}");
+				e.Message = message;
+				chrono.Start ();
+			}
+#endif
+		}
 		[Conditional ("DEBUG_LOG")]
 		public static void EndEvent (DbgEvtType evtType, bool discardIfNoChildEvents = false)
 		{
@@ -147,6 +164,20 @@ namespace Crow
 				DbgEvent evt = addEventInternal (evtType, data);
 				chrono.Start ();
 			}
+#endif
+		}
+		[Conditional("DEBUG_LOG")]
+		public static void AddEventWithMsg (DbgEvtType evtType, string message, params object [] data) {
+#if DEBUG_LOG			
+			if (!logevt (evtType))
+				return;
+
+			lock (logMutex) {
+				chrono.Stop ();
+				DbgEvent evt = addEventInternal (evtType, data);
+				evt.Message = message;
+				chrono.Start ();
+			}
 #endif
 		}
 
@@ -156,10 +187,19 @@ namespace Crow
 			DbgEvent evt = null;
 			if (data == null || data.Length == 0)
 				evt = new DbgEvent (chrono.ElapsedTicks, evtType);
-			else if (data [0] is Widget w)
+			else if (data [0] is Widget w) {
 				evt = new DbgWidgetEvent (chrono.ElapsedTicks, evtType, w.instanceIndex);
-			else if (data [0] is LayoutingQueueItem lqi)
-				evt = new DbgLayoutEvent (chrono.ElapsedTicks, evtType, lqi.graphicObject.instanceIndex, lqi.LayoutType, lqi.result, lqi.Slot, lqi.NewSlot);
+				if (evtType == DbgEvtType.GONewParent) {
+					if (data[1] is Widget wi)
+						evt.Message = $"{wi.instanceIndex}";
+					else if (data[1] is Interface)
+						evt.Message = "Interface";
+					else
+						evt.Message = $"{data[1]}";
+				}
+					
+			} else if (data [0] is LayoutingQueueItem lqi)
+				evt = new DbgLayoutEvent (chrono.ElapsedTicks, evtType, (lqi.Layoutable as Widget).instanceIndex, lqi.LayoutType, lqi.result, lqi.Slot, lqi.NewSlot);
 			else
 				evt = new DbgEvent (chrono.ElapsedTicks, evtType);
 
@@ -245,7 +285,7 @@ namespace Crow
 							writer.WriteLine ("[GraphicObjects]");
 						for (int i = startingWidgetsIndex; i < Widget.GraphicObjects.Count; i++) {
 							Widget g = Widget.GraphicObjects [i];
-							writer.WriteLine ($"{g.GetType ().Name};{g.instanceIndex};{g.yIndex};{g.xLevel};{g.Width};{g.Height}");
+							writer.WriteLine ($"{g.GetType ().Name};{g.instanceIndex};{g.yIndex};{g.xLevel}");
 						}
 					}
 
diff --git a/Crow/src/Fill/SolidColor.cs b/Crow/src/Fill/SolidColor.cs
index 8ed77fbe..40c7cdc1 100644
--- a/Crow/src/Fill/SolidColor.cs
+++ b/Crow/src/Fill/SolidColor.cs
@@ -40,32 +40,17 @@ namespace Crow
         public static implicit operator Color(SolidColor c) => c.color;        
 		public static implicit operator SolidColor(Color c) => new SolidColor (c);
 
-		//public static bool operator ==(SolidColor left, SolidColor right) => left?.color == right?.color;		
-		//public static bool operator !=(SolidColor left, SolidColor right) => left?.color != right?.color;
-
-		public override int GetHashCode ()
-		{
-			return color.GetHashCode();
-		}
+		public override int GetHashCode () => color.GetHashCode();
 		public override bool Equals (object obj)		
 			=> obj is Color c ? color.Equals (c) : obj is Colors cl ? color.Equals(cl) : obj is SolidColor sc && color.Equals (sc.color);			
 		public static SolidColor operator *(SolidColor c, Double f)
-		{
-			return new SolidColor(new Color(c.color.R,c.color.G,c.color.B,c.color.A * f));
-		}
+			=> new SolidColor(new Color(c.color.R,c.color.G,c.color.B,c.color.A * f));
 		public static SolidColor operator +(SolidColor c1, SolidColor c2)
-		{
-			return new SolidColor(new Color(c1.color.R + c2.color.R,c1.color.G + c2.color.G,c1.color.B + c2.color.B,c1.color.A + c2.color.A));
-		}
+			=> new SolidColor(new Color(c1.color.R + c2.color.R,c1.color.G + c2.color.G,c1.color.B + c2.color.B,c1.color.A + c2.color.A));
 		public static SolidColor operator -(SolidColor c1, SolidColor c2)
-		{
-			return new SolidColor(new Color(c1.color.R - c2.color.R,c1.color.G - c2.color.G,c1.color.B - c2.color.B,c1.color.A - c2.color.A));
-		}
+			=> new SolidColor(new Color(c1.color.R - c2.color.R,c1.color.G - c2.color.G,c1.color.B - c2.color.B,c1.color.A - c2.color.A));
 		#endregion
 
-		public override string ToString()
-		{
-			return color.ToString ();
-		}
+		public override string ToString() => color.ToString ();
     }
 }
diff --git a/Crow/src/Font.cs b/Crow/src/Font.cs
index f05c6fb1..1ec0b2cc 100644
--- a/Crow/src/Font.cs
+++ b/Crow/src/Font.cs
@@ -4,7 +4,7 @@
 
 using System;
 using Crow.Cairo;
-using FastEnumUtility;
+//using FastEnumUtility;
 
 namespace Crow
 {
@@ -88,7 +88,7 @@ namespace Crow
 					f.Name = tmp.ToString ();
 				else {
 					f.Name = tmp.Slice (0, ioc).ToString ();
-					f.Style = FastEnum.Parse<FontStyle> (tmp.Slice (ioc + 1).ToString (), true);
+					f.Style = EnumsNET.Enums.Parse<FontStyle> (tmp.Slice (ioc + 1).ToString (), true);
 				}
 			}
 			return f;			
diff --git a/Crow/src/IML/CompilerServices.cs b/Crow/src/IML/CompilerServices.cs
index e5d426d1..75248505 100644
--- a/Crow/src/IML/CompilerServices.cs
+++ b/Crow/src/IML/CompilerServices.cs
@@ -12,7 +12,7 @@ using System.Runtime.CompilerServices;
 using System.Xml;
 using Crow.IML;
 using System.Text;
-using FastEnumUtility;
+//using FastEnumUtility;
 
 namespace Crow.IML
 {
@@ -32,9 +32,8 @@ namespace Crow.IML
 		internal static MethodInfo stringEquals = typeof (string).GetMethod("Equals", new Type [3] { typeof (string), typeof (string), typeof (StringComparison) });
 		internal static MethodInfo miObjToString = typeof(object).GetMethod("ToString");
 		internal static MethodInfo miGetType = typeof(object).GetMethod("GetType");
-		internal static MethodInfo miParseEnum = typeof(Enum).GetMethod("Parse", BindingFlags.Static | BindingFlags.Public,
-			Type.DefaultBinder, new Type [] {typeof (Type), typeof (string), typeof (bool)}, null);
-		internal static MethodInfo miParseEnumInversedParams = typeof(CompilerServices).GetMethod ("ParseEnum", BindingFlags.Static | BindingFlags.NonPublic);
+		internal static MethodInfo miParseEnum = typeof(CompilerServices).GetMethod("parseEnum", BindingFlags.Static | BindingFlags.NonPublic);
+		internal static MethodInfo miParseEnumInversedParams = typeof(CompilerServices).GetMethod ("parseEnumInverseParams", BindingFlags.Static | BindingFlags.NonPublic);
 
 		internal static MethodInfo miGetTypeFromHandle = typeof(Type).GetMethod("GetTypeFromHandle");
 		internal static MethodInfo miGetEvent = typeof(Type).GetMethod("GetEvent", new Type[] {typeof(string)});
@@ -219,9 +218,7 @@ namespace Crow.IML
 					il.Emit(OpCodes.Ldtoken, pi.PropertyType);
 					il.Emit(OpCodes.Call, CompilerServices.miGetTypeFromHandle);
 					//load enum value name
-					il.Emit (OpCodes.Ldstr, Convert.ToString (val));//TODO:implement here string format?
-					//load false
-					il.Emit (OpCodes.Ldc_I4_0);
+					il.Emit (OpCodes.Ldstr, Convert.ToString (val));//TODO:implement here string format?					
 					il.Emit (OpCodes.Call, CompilerServices.miParseEnum);
 
 					if (CompilerServices.miParseEnum.ReturnType != pi.PropertyType)
@@ -416,23 +413,28 @@ namespace Crow.IML
 			foundMI = null;
 			if (assembly == null)
 				return false;
-			foreach (Type t in assembly.GetTypes ().Where
-					(ty => ty.IsDefined (typeof (ExtensionAttribute), false))) {
-				foreach (MethodInfo mi in t.GetMethods 
-					(BindingFlags.Static | BindingFlags.Public | BindingFlags.NonPublic).Where
-						(m=> m.Name == methodName && m.IsDefined (typeof (ExtensionAttribute), false) &&
-						 m.GetParameters ().Length > 0)) {
-					Type curType = extendedType;
-					while (curType != null) {
-						if (mi.GetParameters () [0].ParameterType == curType) {
-							foundMI = mi;
-							return true;
-						}
-						curType = curType.BaseType;
-					}						
-				}
-			
+			try
+			{
+				
+				foreach (Type t in assembly.GetExportedTypes().Where
+						(ty => ty.IsDefined (typeof (ExtensionAttribute), false))) {
+					foreach (MethodInfo mi in t.GetMethods 
+						(BindingFlags.Static | BindingFlags.Public | BindingFlags.NonPublic).Where
+							(m=> m.Name == methodName && m.IsDefined (typeof (ExtensionAttribute), false) &&
+							 m.GetParameters ().Length > 0)) {
+						Type curType = extendedType;
+						while (curType != null) {
+							if (mi.GetParameters () [0].ParameterType == curType) {
+								foundMI = mi;
+								return true;
+							}
+							curType = curType.BaseType;
+						}						
+					}
+				
+				}				
 			}
+			catch (System.Exception) {}
 			return false;
 		}
 		/// <summary>
@@ -632,7 +634,6 @@ namespace Crow.IML
 				}
 			}
 		}
-		internal static object ParseEnum (string str, Type enumType) => Enum.Parse (enumType, str);
 
 		internal static bool isValueType (object obj) => obj.GetType ().IsValueType;
 		/// <summary>
@@ -873,16 +874,16 @@ namespace Crow.IML
 				knownTypes.Add (strDataType, dataType);
 				return dataType;
 			}
-			foreach (Assembly a in AppDomain.CurrentDomain.GetAssemblies ()) {
-				if (a.IsDynamic)
-					continue;
-				foreach (Type expT in a.GetExportedTypes ()) {
-					if (expT.Name != strDataType && expT.FullName != strDataType)
-						continue;
-					if (!knownTypes.ContainsKey(strDataType))
-						knownTypes.Add (strDataType, expT);
-					return expT;
-				}
+			foreach (Assembly a in Interface.crowAssemblies) {
+				try {
+					foreach (Type expT in a.GetExportedTypes ()) {
+						if (expT.Name != strDataType && expT.FullName != strDataType)
+							continue;
+						if (!knownTypes.ContainsKey(strDataType))
+							knownTypes.Add (strDataType, expT);
+						return expT;
+					}
+				}catch{}
 			}
 			knownTypes.Add (strDataType, null);
 			return null;
@@ -1016,6 +1017,25 @@ namespace Crow.IML
 				mi.MemberType == MemberTypes.Field ? (mi as FieldInfo).FieldType :
 				mi.MemberType == MemberTypes.Property ? (mi as PropertyInfo).PropertyType :
 				mi.MemberType == MemberTypes.Method ? (mi as MethodInfo).ReturnType : null;
+
+		/*internal static object parseEnum (Type enumType, string val)
+			=> EnumsNET.FlagEnums.IsFlagEnum (enumType) ?
+				EnumsNET.FlagEnums.ParseFlags (enumType, val, true, "|") :
+				EnumsNET.Enums.Parse (enumType, val, true);*/
+		internal static object parseEnum (Type enumType, string val) {
+			try
+			{
+			 return EnumsNET.FlagEnums.IsFlagEnum (enumType) ?
+				EnumsNET.FlagEnums.ParseFlags (enumType, val, true, "|") :
+				EnumsNET.Enums.Parse (enumType, val, true);				
+			}
+			catch (System.Exception)
+			{
+				Console.WriteLine($"{enumType} {val}");
+				throw;
+			}
+		}
+		internal static object parseEnumInverseParams (string str, Type enumType) => parseEnum (enumType, str);
 	}
 }
 
diff --git a/Crow/src/IML/Instantiator.cs b/Crow/src/IML/Instantiator.cs
index 855e8669..7a2472ae 100644
--- a/Crow/src/IML/Instantiator.cs
+++ b/Crow/src/IML/Instantiator.cs
@@ -732,8 +732,6 @@ namespace Crow.IML {
 						il.Emit (OpCodes.Call, CompilerServices.miGetTypeFromHandle);
 						//load enum value name
 						il.Emit (OpCodes.Ldstr, operandes [1].Trim ());
-						//load false
-						il.Emit (OpCodes.Ldc_I4_0);
 					} else {
 						lopParseMi = lopPI.PropertyType.GetMethod ("Parse");
 						if (lopParseMi == null)
diff --git a/Crow/src/Input/MouseEventArgs.cs b/Crow/src/Input/MouseEventArgs.cs
index e64e9a1b..9d3badda 100644
--- a/Crow/src/Input/MouseEventArgs.cs
+++ b/Crow/src/Input/MouseEventArgs.cs
@@ -2,14 +2,31 @@
 // Copyright (c) 2014-2020  Jean-Philippe Bruyère <jp_bruyere@hotmail.com>
 //
 // This code is licensed under the MIT license (MIT) (http://opensource.org/licenses/MIT)
+using System;
 using Glfw;
 
 namespace Crow
 {
+	[Flags]
+	public enum DeviceEventType {
+		None			= 0x00,
+		MouseMove		= 0x01,
+		ButtonDown		= 0x02,
+		ButtonUp		= 0x04,
+		Buttons			= ButtonDown | ButtonUp,
+		MouseClick		= 0x08,
+		MouseWheel		= 0x10,
+		Mouse			= Buttons | MouseWheel | MouseClick | MouseMove,
+		KeyDown			= 0x20,
+		KeyUp			= 0x40,
+		KeyPress		= 0x80,
+		Keyboard		= KeyDown | KeyUp | KeyPress,
+		All				= Mouse | Keyboard
+	}
 	public class MouseEventArgs : CrowEventArgs
 	{
 		public readonly int X, Y;
-		public Point Position => new Point (X, Y);
+		public Point Position => new Point (X, Y);		
 		public MouseEventArgs () { }
 		public MouseEventArgs (int x, int y) {
 			X = x;
diff --git a/Crow/src/Interface.cs b/Crow/src/Interface.cs
index a32577ce..44f0a786 100644
--- a/Crow/src/Interface.cs
+++ b/Crow/src/Interface.cs
@@ -60,6 +60,22 @@ namespace Crow
 		#endregion
 
 		internal static List<Assembly> crowAssemblies = new List<Assembly> ();
+		public void AddCrowAssembly (Assembly a) {
+			lock (UpdateMutex) {
+				if (crowAssemblies.Contains (a))
+					return;
+				crowAssemblies.Add (a);
+				loadStylingFromAssembly (a);
+			}
+		}
+		public void RemoveCrowAssembly (Assembly a) {
+			lock (UpdateMutex) {
+				if (!crowAssemblies.Contains (a))
+					return;
+				crowAssemblies.Remove (a);
+				init_internal ();
+			}
+		}
 
 		#region CTOR
 		static Interface ()
@@ -458,10 +474,10 @@ namespace Crow
 		public const int MaxCacheSize = 2048;
 		/// <summary> Above this count, the layouting is discard from the current
 		/// update cycle and requeued for the next</summary>
-		public const int MaxLayoutingTries = 3;
+		public static int MaxLayoutingTries = 30;
 		/// <summary> Above this count, the layouting is discard for the widget and it
 		/// will not be rendered on screen </summary>
-		public const int MaxDiscardCount = 5;
+		public static int MaxDiscardCount = 5;
 		/// <summary> Global font rendering settings for Cairo </summary>
 		public static FontOptions FontRenderingOptions;
 		/// <summary> Global font rendering settings for Cairo </summary>
@@ -1244,8 +1260,7 @@ namespace Crow
 
 			lock (UpdateMutex)
 				GraphicTree.Insert (ptr, g);
-
-			g.RegisteredLayoutings = LayoutingType.None;
+			
 			g.RegisterForLayouting (LayoutingType.Sizing | LayoutingType.ArrangeChildren);
 
 			return g;
@@ -1658,47 +1673,48 @@ namespace Crow
 		public virtual bool OnMouseButtonUp (MouseButton button)
 		{
 			DbgLogger.StartEvent (DbgEvtType.MouseUp);
-			mouseRepeatTimer.Reset ();
-			lastMouseDownEvent = null;
 
-			if (DragAndDropInProgress) {				
-				if (DragAndDropOperation.DropTarget != null)
-					DragAndDropOperation.DragSource.onDrop (this, DragAndDropOperation);
-				else
-					DragAndDropOperation.DragSource.onEndDrag (this, DragAndDropOperation);
-				DragAndDropOperation = null;
-				if (ActiveWidget != null) {
-					ActiveWidget.onMouseUp (_activeWidget, new MouseButtonEventArgs (MousePosition.X, MousePosition.Y, button, InputAction.Release));
-					ActiveWidget = null;
-				}
-				DbgLogger.EndEvent (DbgEvtType.MouseUp);
-				return true;
-            }
+			try {
+				mouseRepeatTimer.Reset ();
+				lastMouseDownEvent = null;
+
+				if (DragAndDropInProgress) {				
+					if (DragAndDropOperation.DropTarget != null)
+						DragAndDropOperation.DragSource.onDrop (this, DragAndDropOperation);
+					else
+						DragAndDropOperation.DragSource.onEndDrag (this, DragAndDropOperation);
+					DragAndDropOperation = null;
+					if (ActiveWidget != null) {
+						ActiveWidget.onMouseUp (_activeWidget, new MouseButtonEventArgs (MousePosition.X, MousePosition.Y, button, InputAction.Release));
+						ActiveWidget = null;
+					}
+					return true;
+	            }
 
-			if (_activeWidget == null) {
-				DbgLogger.EndEvent (DbgEvtType.MouseUp);
-				return false;
-			}
+				if (_activeWidget == null)
+					return false;
 
-			_activeWidget.onMouseUp (_activeWidget, new MouseButtonEventArgs (MousePosition.X, MousePosition.Y, button, InputAction.Release));
+				_activeWidget.onMouseUp (_activeWidget, new MouseButtonEventArgs (MousePosition.X, MousePosition.Y, button, InputAction.Release));
 
-			if (_activeWidget == null) {
-				Debug.WriteLine ("[BUG]Mystery reset of _activeWidget");
-				DbgLogger.EndEvent (DbgEvtType.MouseUp | DbgEvtType.Error);
-				return true;
-			}
+				if (_activeWidget == null) {					
+					DbgLogger.SetMsg (DbgEvtType.MouseUp, "[BUG]Mystery reset of _activeWidget");
+					return true;
+				}
 
-			if (doubleClickTriggered)
-				_activeWidget.onMouseDoubleClick (_activeWidget, new MouseButtonEventArgs (MousePosition.X, MousePosition.Y, button, InputAction.Press));
-			else
-				_activeWidget.onMouseClick (_activeWidget, new MouseButtonEventArgs (MousePosition.X, MousePosition.Y, button, InputAction.Press));
+				if (doubleClickTriggered)
+					_activeWidget.onMouseDoubleClick (_activeWidget, new MouseButtonEventArgs (MousePosition.X, MousePosition.Y, button, InputAction.Press));
+				else
+					_activeWidget.onMouseClick (_activeWidget, new MouseButtonEventArgs (MousePosition.X, MousePosition.Y, button, InputAction.Press));
 
-			ActiveWidget = null;
-			//			if (!lastActive.MouseIsIn (Mouse.Position)) {
-			//				ProcessMouseMove (Mouse.X, Mouse.Y);
-			//			}
-			DbgLogger.EndEvent (DbgEvtType.MouseUp);
-			return true;
+				ActiveWidget = null;
+				//			if (!lastActive.MouseIsIn (Mouse.Position)) {
+				//				ProcessMouseMove (Mouse.X, Mouse.Y);
+				//			}
+				
+				return true;
+			} finally {
+				DbgLogger.EndEvent (DbgEvtType.MouseUp);
+			}
 		}
 		/// <summary>
 		/// Forward the mouse wheel event from the host to the crow interface
@@ -1909,7 +1925,7 @@ namespace Crow
 				else
 					ctxMenuContainer.IsOpened = true;
 
-				ctxMenuContainer.BubbleMouseEvent = false;
+				ctxMenuContainer.BubbleMouseEvent = DeviceEventType.None;
 				ctxMenuContainer.LogicalParent = go;
 				ctxMenuContainer.DataSource = go;
 				
@@ -1957,6 +1973,10 @@ namespace Crow
 			get => LayoutingType.None;
 			set { throw new NotImplementedException (); }
 		}
+		public LayoutingType RequiredLayoutings {
+			get => LayoutingType.None;
+			set { throw new NotImplementedException (); }
+		}
 		public void RegisterForLayouting (LayoutingType layoutType) { throw new NotImplementedException (); }
 		public bool UpdateLayout (LayoutingType layoutType) { throw new NotImplementedException (); }
 		public Rectangle ContextCoordinates (Rectangle r) => r;
diff --git a/Crow/src/ItemTemplate.cs b/Crow/src/ItemTemplate.cs
index 9a5700a6..dc8e29c0 100644
--- a/Crow/src/ItemTemplate.cs
+++ b/Crow/src/ItemTemplate.cs
@@ -220,7 +220,9 @@ namespace Crow
 			//dm is unbound, arg0 is instance of Item container to expand
 			dm = new DynamicMethod ("dyn_count_" + fetchMethodName,
 				typeof (bool), new Type[] {typeof(object)}, true);
-			il = dm.GetILGenerator (256);
+			il = dm.GetILGenerator (256);			
+			System.Reflection.Emit.Label end = il.DefineLabel ();
+			System.Reflection.Emit.Label test = il.DefineLabel ();
 
 			//get the dataSource of the arg0
 			il.Emit (OpCodes.Ldarg_0);
@@ -235,11 +237,22 @@ namespace Crow
 					il.Emit (OpCodes.Call, CompilerServices.miGetDataTypeAndFetch);
 				}else
 					emitGetSubData(il, dataType);			
-			}
-			
-			il.Emit (OpCodes.Callvirt, CompilerServices.miGetColCount);
+			}			
+			il.Emit (OpCodes.Isinst, typeof(System.Collections.ICollection));
+			il.Emit (OpCodes.Dup);//duplicate children for testing if it's a collection for childs counting
+			il.Emit (OpCodes.Brtrue, test);//if true, jump to perform count
+			il.Emit (OpCodes.Pop);//pop null
+			il.Emit (OpCodes.Ldc_I4_0);//push false			
+			il.Emit (OpCodes.Br, end);
+
+			il.MarkLabel (test);
+
+			il.Emit (OpCodes.Callvirt, CompilerServices.miGetColCount);			
 			il.Emit (OpCodes.Ldc_I4_0);
 			il.Emit (OpCodes.Cgt);
+
+			il.MarkLabel (end);
+
 			il.Emit (OpCodes.Ret);
 			HasSubItems = (BooleanTestOnInstance)dm.CreateDelegate (typeof(BooleanTestOnInstance));
 			#endregion
diff --git a/Crow/src/LayoutingQueueItem.cs b/Crow/src/LayoutingQueueItem.cs
index 3cfdaa47..a9a634c3 100644
--- a/Crow/src/LayoutingQueueItem.cs
+++ b/Crow/src/LayoutingQueueItem.cs
@@ -17,7 +17,7 @@ namespace Crow
 		Height = 0x08,
 		Sizing = 0x0C,
 		ArrangeChildren = 0x10,
-		All = 0xFF
+		All = Positioning | Sizing | ArrangeChildren
 	}
 
 	/// <summary>
@@ -43,21 +43,6 @@ namespace Crow
 		}
 #if DEBUG_LOG
 		public Result result;
-		public Widget graphicObject {
-			get { return Layoutable as Widget; }
-		}
-		public string Name {
-			get { return graphicObject.Name; }
-		}
-		public string FullName {
-			get { return graphicObject.ToString(); }
-		}
-		public Measure Width {
-			get { return graphicObject.Width; }
-		}
-		public Measure Height {
-			get { return graphicObject.Height; }
-		}
 		public Rectangle Slot, NewSlot;
 #endif
 
@@ -88,45 +73,62 @@ namespace Crow
 
 			try {
 
-				if (go.Parent == null) {//TODO:improve this
-					//cancel layouting for object without parent, maybe some were in queue when
-					//removed from a listbox
-					DbgLogger.AddEvent (DbgEvtType.GOProcessLayoutingWithNoParent, this);
+				if (!go.layoutMutex.TryEnterWriteLock (1)) {
+					go.IFace.LayoutingQueue.Enqueue (this);
+#if DEBUG_LOG					
+					result = Result.Requeued;
+#endif
 					return;
 				}
+
+				try {
+					if (go.Parent == null) {//TODO:improve this
+						//cancel layouting for object without parent, maybe some were in queue when
+						//removed from a listbox
+						DbgLogger.AddEvent (DbgEvtType.GOProcessLayoutingWithNoParent, this);
+						return;
+					}
 #if DEBUG_LOG
-				Slot = graphicObject.Slot;
+					Slot = Layoutable.getSlot ();
+#endif
+					LayoutingTries++;
+					
+					if (Layoutable.UpdateLayout (LayoutType)) {
+						Layoutable.RequiredLayoutings &= (~LayoutType);
+						if (Layoutable.RequiredLayoutings == LayoutingType.None && go.IsDirty)							
+							go.IFace.EnqueueForRepaint (this);
+#if DEBUG_LOG					
+						result = Result.Success;
 #endif
-				LayoutingTries++;
-				if (!Layoutable.UpdateLayout (LayoutType)) {
-					if (LayoutingTries < Interface.MaxLayoutingTries) {
-						Layoutable.RegisteredLayoutings |= LayoutType;
-						(Layoutable as Widget).IFace.LayoutingQueue.Enqueue (this);
+					} else {
+						if (LayoutingTries < Interface.MaxLayoutingTries) {
+							Layoutable.RegisteredLayoutings |= LayoutType;
+							go.IFace.LayoutingQueue.Enqueue (this);
 #if DEBUG_LOG
-						result = Result.Requeued;
+							result = Result.Requeued;
 #endif
-					} else if (DiscardCount < Interface.MaxDiscardCount) {
+						} else if (DiscardCount < Interface.MaxDiscardCount) {
 #if DEBUG_LOG
-						result = Result.Discarded;
+							result = Result.Discarded;
 #endif
-						LayoutingTries = 0;
-						DiscardCount++;
-						Layoutable.RegisteredLayoutings |= LayoutType;
-						(Layoutable as Widget).IFace.DiscardQueue.Enqueue (this);
-					}
+							LayoutingTries = 0;
+							DiscardCount++;
+							Layoutable.RegisteredLayoutings |= LayoutType;
+							go.IFace.DiscardQueue.Enqueue (this);
+						}
 #if DEBUG_LOG
-					else {
-						result = Result.Deleted;
+						else {
+							result = Result.Deleted;
+						}
+#endif
 					}
+#if DEBUG_LOG				
+					NewSlot = Layoutable.getSlot();
 #endif
+				} finally {
+					go.layoutMutex.ExitWriteLock ();
 				}
-#if DEBUG_LOG
-				else{
-					result = Result.Success;
-				}
-				NewSlot = graphicObject.Slot;
-#endif
-			}finally {
+			} finally {
 				go.parentRWLock.ExitReadLock ();
 				DbgLogger.EndEvent (DbgEvtType.GOProcessLayouting, this);
 			}
diff --git a/Crow/src/ObservableList.cs b/Crow/src/ObservableList.cs
index dc211f0a..3cfe101a 100644
--- a/Crow/src/ObservableList.cs
+++ b/Crow/src/ObservableList.cs
@@ -10,7 +10,7 @@ using System.Collections;
 
 namespace Crow
 {
-	public class ObservableList<T> : IList<T>, IObservableList, IValueChange {
+	public class ObservableList<T> : IList<T>, IObservableList, IValueChange, ICollection {
 		#region IValueChange implementation
 		public event EventHandler<ValueChangeEventArgs> ValueChanged;
 		public virtual void NotifyValueChanged (string MemberName, object _value)
@@ -62,6 +62,10 @@ namespace Crow
 
 		public bool IsReadOnly => false;
 
+		public bool IsSynchronized => throw new NotImplementedException();
+
+		public object SyncRoot => throw new NotImplementedException();
+
 		public T this[int index] {
 			get => items[index];
 			set {
@@ -157,6 +161,8 @@ namespace Crow
 		public IEnumerator<T> GetEnumerator() => items.GetEnumerator ();
 
 		IEnumerator IEnumerable.GetEnumerator() => items.GetEnumerator ();
+
+		public void CopyTo(Array array, int index) => items.ToArray().CopyTo (array, index);
 	}
 }
 
diff --git a/Crow/src/Widgets/ColorPicker.cs b/Crow/src/Widgets/ColorPicker.cs
index 3ea8b547..58810666 100644
--- a/Crow/src/Widgets/ColorPicker.cs
+++ b/Crow/src/Widgets/ColorPicker.cs
@@ -34,7 +34,7 @@ namespace Crow
 			}
 		}
 		public IList<Colors> AvailableColors => //Enum.GetValues (typeof (Color)).ToList<Color> ();// Colors. ColorDic.Values.OrderBy (c => c.Hue).ToList ();
-			FastEnumUtility.FastEnum.GetValues<Colors> ().ToList<Colors> ();
+			EnumsNET.Enums.GetValues<Colors> ().ToList<Colors> ();
 
 		public void onSelectedItemChanged(object sender, SelectionChangeEventArgs e) {
 			CurrentColor = (Color)(Colors)e.NewValue;
diff --git a/Crow/src/Widgets/DockStack.cs b/Crow/src/Widgets/DockStack.cs
index 41c7f8b4..3d70a84e 100644
--- a/Crow/src/Widgets/DockStack.cs
+++ b/Crow/src/Widgets/DockStack.cs
@@ -4,7 +4,6 @@
 
 using System;
 using System.Text;
-using FastEnumUtility;
 
 namespace Crow
 {
@@ -289,9 +288,9 @@ namespace Crow
 		}
 
 		//read next value in config string until next ';'
-		string getConfAttrib (string conf, ref int i) {
-			int nextI = conf.Substring (i).IndexOf (';');
-			string tmp = conf.Substring (i, nextI);
+		ReadOnlySpan<char> getConfAttrib (ReadOnlySpan<char> conf, ref int i) {
+			int nextI = conf.Slice (i).IndexOf (';');
+			ReadOnlySpan<char> tmp = conf.Slice (i, nextI);
 			i += nextI + 1;
 			return tmp;
 		}
@@ -300,12 +299,12 @@ namespace Crow
 		/// </summary>
 		/// <param name="conf">Conf.</param>
 		/// <param name="dataSource">Data source for the docked windows</param>
-		public void ImportConfig (string conf, object dataSource = null) {
+		public void ImportConfig (ReadOnlySpan<char> conf, object dataSource = null) {
 			lock (IFace.UpdateMutex) {
 				ClearChildren ();
 				stretchedChild = null;
 				int i = 0;
-				Orientation = FastEnum.Parse<Orientation> (getConfAttrib (conf, ref i));
+				Orientation = EnumsNET.Enums.Parse<Orientation> (getConfAttrib (conf, ref i).ToString());
 				importConfig (conf, ref i, dataSource);
 			}
 		}
@@ -313,38 +312,39 @@ namespace Crow
 			return Orientation.ToString() + ";" + exportConfig();
 		}
 
-		DockWindow importDockWinConfig (string conf, ref int i, object dataSource){
+		DockWindow importDockWinConfig (ReadOnlySpan<char> conf, ref int i, object dataSource){
 			DockWindow dw = null;
-			string wName = getConfAttrib (conf, ref i);
+			string wName = getConfAttrib (conf, ref i).ToString();
 			try {
 				dw = IFace.CreateInstance (wName) as DockWindow;	
-			} catch {
+			} catch (Exception ex){
+				Console.WriteLine ($"[importDockWinConfig]{ex}");
 				dw = new DockWindow (IFace);						
 			}
 
 			dw.Name = wName;
-			dw.Width = Measure.Parse (getConfAttrib (conf, ref i));
-			dw.Height = Measure.Parse (getConfAttrib (conf, ref i));
-			dw.DockingPosition = FastEnum.Parse<Alignment> (getConfAttrib (conf, ref i));
-			dw.savedSlot = Rectangle.Parse (getConfAttrib (conf, ref i));
-			dw.wasResizable = Boolean.Parse (getConfAttrib (conf, ref i));
+			dw.Width = Measure.Parse (getConfAttrib (conf, ref i).ToString());
+			dw.Height = Measure.Parse (getConfAttrib (conf, ref i).ToString());
+			dw.DockingPosition = EnumsNET.Enums.Parse<Alignment> (getConfAttrib (conf, ref i).ToString());
+			dw.savedSlot = Rectangle.Parse (getConfAttrib (conf, ref i).ToString());
+			dw.wasResizable = Boolean.Parse (getConfAttrib (conf, ref i).ToString());
 			dw.Resizable = false;
 			
 			dw.DataSource = dataSource;
 			return dw;
 		}
-		void importConfig (string conf, ref int i, object dataSource) {						
+		void importConfig (ReadOnlySpan<char> conf, ref int i, object dataSource) {						
 			if (conf [i++] != '(')
 				return;
 			DockWindow dw = null;			
 			while (i < conf.Length - 4) {
-				string sc = conf.Substring (i, 4);
+				string sc = conf.Slice (i, 4).ToString();
 				i += 4;
 				switch (sc) {
 				case "TVI;":
 					TabView tv = new TabView (IFace, "DockingTabView");
-					tv.Width = Measure.Parse (getConfAttrib (conf, ref i));
-					tv.Height = Measure.Parse (getConfAttrib (conf, ref i));
+					tv.Width = Measure.Parse (getConfAttrib (conf, ref i).ToString());
+					tv.Height = Measure.Parse (getConfAttrib (conf, ref i).ToString());
 					this.AddChild (tv);
 					i++;					
 					while (conf [i] != ')') {
@@ -361,9 +361,9 @@ namespace Crow
 					break;
 				case "STK;":
 					DockStack ds = new DockStack (IFace);
-					ds.Width = Measure.Parse (getConfAttrib (conf, ref i));
-					ds.Height = Measure.Parse (getConfAttrib (conf, ref i));
-					ds.Orientation = FastEnum.Parse<Orientation> (getConfAttrib (conf, ref i));
+					ds.Width = Measure.Parse (getConfAttrib (conf, ref i).ToString());
+					ds.Height = Measure.Parse (getConfAttrib (conf, ref i).ToString());
+					ds.Orientation = EnumsNET.Enums.Parse<Orientation> (getConfAttrib (conf, ref i).ToString());
 
 					this.AddChild (ds);
 
@@ -371,8 +371,8 @@ namespace Crow
 					break;
 				case "SPL;":
 					Splitter sp = new Splitter (IFace);
-					sp.Width = Measure.Parse (getConfAttrib (conf, ref i));
-					sp.Height = Measure.Parse (getConfAttrib (conf, ref i));
+					sp.Width = Measure.Parse (getConfAttrib (conf, ref i).ToString());
+					sp.Height = Measure.Parse (getConfAttrib (conf, ref i).ToString());
 					sp.Thickness = int.Parse (getConfAttrib (conf, ref i));
 					this.AddChild (sp);
 					break;
@@ -387,11 +387,11 @@ namespace Crow
 
 			for (int i = 0; i < Children.Count; i++) {
 				if (Children [i] is DockWindow dw)					
-					tmp.Append (dw.GetConfigString());
+					tmp.Append (dw.GetDockConfigString());
 				else if (Children [i] is TabView tv) {
 					tmp.Append ($"TVI;{tv.Width};{tv.Height};(");
 					foreach (DockWindow d in tv.Items)
-						tmp.Append (d.GetConfigString().Substring(4));					
+						tmp.Append (d.GetDockConfigString().Substring(4));					
 					tmp.Append (")");
 				}else if (Children [i] is DockStack ds)
 					tmp.Append ($"STK;{ds.Width};{ds.Height};{ds.Orientation};{ds.exportConfig()}");
diff --git a/Crow/src/Widgets/DockWindow.cs b/Crow/src/Widgets/DockWindow.cs
index af47ce3a..7f36dad4 100644
--- a/Crow/src/Widgets/DockWindow.cs
+++ b/Crow/src/Widgets/DockWindow.cs
@@ -16,13 +16,20 @@ namespace Crow
 		public DockWindow (Interface iface) : base (iface) {}
 		#endregion
 
+		protected override void loadTemplate(Widget template = null)
+		{
+			initCommands ();
+
+			base.loadTemplate (template);
+		}
+
 		int undockThreshold = 10;
 		bool isDocked = false;
 		Alignment docking = Alignment.Undefined;
 
 		Point undockingMousePosOrig; //mouse pos when docking was donne, use for undocking on mouse move
 		internal Rectangle savedSlot;	//last undocked slot recalled when view is undocked
-		internal bool wasResizable;
+		internal bool wasResizable, freezeDockState;
 
 		public bool IsDocked {
 			get { return isDocked; }
@@ -40,6 +47,35 @@ namespace Crow
 		[XmlIgnore] public bool IsDockedInTabView => LogicalParent is TabView;
 		[XmlIgnore] public bool IsDockedInStack => Parent is DockStack;
 
+		public Command CMDFreezeDockState, CMDUnfreezeDockState;
+		public CommandGroup DockCommands => new CommandGroup (CMDFreezeDockState, CMDUnfreezeDockState);
+		void initCommands () {
+			CMDFreezeDockState = new Command ("Freeze Dock State", () => FreezeDockState = true, "#Crow.Icons.unpin.svg", !FreezeDockState);
+			CMDUnfreezeDockState = new Command ("Unfreeze Dock State", () => FreezeDockState = false, "#Crow.Icons.pin.svg", FreezeDockState);
+		}
+
+		/// <summary>
+		/// if true, current dock status (docked or undocked) is frozen, and trying to move the
+		/// window will not trigger docking try.
+		/// </summary>
+		/// <value></value>
+		public bool FreezeDockState {
+			get { return freezeDockState; }
+			set {
+				if (freezeDockState == value)
+					return;
+				freezeDockState = value;
+				NotifyValueChangedAuto (freezeDockState);
+
+				if (CMDFreezeDockState == null)
+					initCommands ();
+				else {
+					CMDFreezeDockState.CanExecute = !freezeDockState;
+					CMDUnfreezeDockState.CanExecute = freezeDockState;
+				}
+			}
+		}
+
 		public Alignment DockingPosition {
 			get { return docking; }
 			set {
@@ -49,27 +85,22 @@ namespace Crow
 				NotifyValueChangedAuto (DockingPosition);
 			}
 		}
-		/*public override bool PointIsIn (ref Point m)
-		{			
-			if (!base.PointIsIn(ref m))
-				return false;
-
-			Group p = Parent as Group;
-			if (p != null) {
-				lock (p.Children) {
-					for (int i = p.Children.Count - 1; i >= 0; i--) {
-						if (p.Children [i] == this)
-							break;
-						if (p.Children [i].IsDragged)
-							continue;
-						if (p.Children [i].Slot.ContainsOrIsEqual (m)) {						
-							return false;
-						}
-					}
-				}
+		Group floatingGroup;
+		/// <summary>
+		/// If null, the default container for the floating windows is the Interface. If a valid
+		/// group is set, undocked windows will be contained in this widget, allowing multiple independant levels
+		/// of dockable windows
+		/// </summary>
+		/// <value></value>
+		public Group FloatingGroup {
+			get => floatingGroup;
+			set {
+				if (floatingGroup == value)
+					return;
+				floatingGroup = value;
+				NotifyValueChangedAuto (floatingGroup);
 			}
-			return Slot.ContainsOrIsEqual(m);
-		}*/
+		}
 		
 		bool tryGetTargetDockStack (DockWindow dw, out DockStack ds) {
 			if (dw.Parent is DockStack dwp)
@@ -83,14 +114,14 @@ namespace Crow
 		bool dockParentParent = false;
 		public override void onDrag (object sender, MouseMoveEventArgs e)
 		{			
-			if (isDocked)
-				CheckUndock (e.Position);
+			if (!freezeDockState && isDocked)
+				checkUndock (e.Position);
 			else
 				moveAndResize (e.XDelta, e.YDelta, currentDirection);
 			
 			base.onDrag (sender, e);
 
-			if (isDocked)
+			if (freezeDockState || isDocked)
 				return;
 
 			Alignment dockingPosSave = DockingPosition;
@@ -190,16 +221,6 @@ namespace Crow
 			if (this.HasFocus && IsDocked && e.Button == MouseButton.Left)
 				undockingMousePosOrig = e.Position;
 		}
-		public bool CheckUndock (Point mousePos) {
-			//if (DockingPosition == Alignment.Center)
-			//	return false;
-			System.Diagnostics.Debug.WriteLine ($"{mousePos.X},{mousePos.Y}");
-			if (Math.Abs (mousePos.X - undockingMousePosOrig.X) < undockThreshold ||
-			    Math.Abs (mousePos.X - undockingMousePosOrig.X) < undockThreshold)
-				return false;
-			Undock ();
-			return true;
-		}
 
 		protected override void onStartDrag (object sender, DragDropEventArgs e)
 		{
@@ -246,6 +267,8 @@ namespace Crow
 						tv.Dispose();
 						w.IsVisible = true;
 						ds.checkAlignments();
+						w.NotifyValueChanged ("IsDockedInTabView", false);
+						w.NotifyValueChanged ("IsDockedInStack", true);
 					}
 				} else if (Parent is DockStack ds) {
 					ds.Undock (this);
@@ -264,7 +287,16 @@ namespace Crow
 				Resizable = wasResizable;
 			}
 		}
-
+		bool checkUndock (Point mousePos) {
+			//if (DockingPosition == Alignment.Center)
+			//	return false;
+			System.Diagnostics.Debug.WriteLine ($"{mousePos.X},{mousePos.Y}");
+			if (Math.Abs (mousePos.X - undockingMousePosOrig.X) < undockThreshold ||
+			    Math.Abs (mousePos.X - undockingMousePosOrig.X) < undockThreshold)
+				return false;
+			Undock ();
+			return true;
+		}
 		void dock () {
 			IFace.RemoveWidget (this);
 
@@ -276,9 +308,8 @@ namespace Crow
 			LastSlots = LastPaintedSlot = Slot = default(Rectangle);
 			Left = Top = 0;
 		}
-		public void Dock (DockWindow target) {
+		void Dock (DockWindow target) {
 			lock (IFace.UpdateMutex) {
-				//IsDocked = true;
 				dock ();
 
 				if (target.LogicalParent is TabView tv) {
@@ -299,11 +330,14 @@ namespace Crow
 					tv2.AddItem (this);
 					target.Width = target.Height = this.Width = this.Height = Measure.Stretched;
 					target.DockingPosition = this.DockingPosition = Alignment.Center;
+					target.NotifyValueChanged ("IsDockedInTabView", true);
+					target.NotifyValueChanged ("IsDockedInStack", false);
+
 					IsDocked = true;
 				}				
 			}
 		}
-		public void Dock (DockStack target){
+		void Dock (DockStack target){
 			lock (IFace.UpdateMutex) {				
 				dock ();
 
@@ -318,8 +352,34 @@ namespace Crow
 			base.close ();
 		}
 
-		internal string GetConfigString () =>
+		internal string GetDockConfigString () =>
 			string.Format($"WIN;{Name};{Width};{Height};{DockingPosition};{savedSlot};{wasResizable};");
+
+		
+		public string FloatingConfigString =>
+			$"{Name};{Left};{Top};{Width};{Height};{FreezeDockState};{Resizable}";
+		public static DockWindow CreateFromFloatingConfigString (Interface iface, ReadOnlySpan<char> conf, object datasource = null) {
+			int i = conf.IndexOf (';');
+			string wname = conf.Slice(0, i).ToString();
+			DockWindow dw = iface.CreateInstance (wname) as DockWindow;
+			dw.Name = wname;
+			conf = conf.Slice (i + 1); i = conf.IndexOf (';');
+			dw.Left = int.Parse (conf.Slice(0, i).ToString());
+			conf = conf.Slice (i + 1); i = conf.IndexOf (';');
+			dw.Top = int.Parse (conf.Slice(0, i).ToString());
+			conf = conf.Slice (i + 1); i = conf.IndexOf (';');
+			dw.Width = Measure.Parse (conf.Slice(0, i).ToString());
+			conf = conf.Slice (i + 1); i = conf.IndexOf (';');
+			dw.Height = Measure.Parse (conf.Slice(0, i).ToString());
+			conf = conf.Slice (i + 1); i = conf.IndexOf (';');
+			dw.FreezeDockState = bool.Parse (conf.Slice(0, i).ToString());
+			
+			dw.Resizable = bool.Parse (conf.Slice (i + 1).ToString());
+			dw.DataSource = datasource;
+
+			iface.AddWidget (dw);
+			return dw;
+		}
 	}
 }
 
diff --git a/Crow/src/Widgets/Expandable.cs b/Crow/src/Widgets/Expandable.cs
index e2a7818b..d63249bb 100644
--- a/Crow/src/Widgets/Expandable.cs
+++ b/Crow/src/Widgets/Expandable.cs
@@ -46,9 +46,12 @@ namespace Crow
 			}
 		}
 		#endregion
+		public override void OnDataSourceChanged(object sender, DataSourceChangeEventArgs e)
+		{
+			base.OnDataSourceChanged(sender, e);
+			NotifyValueChanged ("IsExpandable", IsExpandable);
 
-		public BooleanTestOnInstance GetIsExpandable;
-
+		}
 		/// <summary>
 		/// mouse click event handler for easy expand triggering in IML
 		/// </summary>
@@ -96,7 +99,7 @@ namespace Crow
 		[XmlIgnore]public bool IsExpandable {
 			get {
 				try {
-					return GetIsExpandable == null ? true : GetIsExpandable (this);
+					return IsToggleable == null ? true : IsToggleable (this);
 				} catch (Exception ex) {
 					System.Diagnostics.Debug.WriteLine ("Not Expandable error: " + ex.ToString ());
 					return false;
diff --git a/Crow/src/Widgets/GenericStack.cs b/Crow/src/Widgets/GenericStack.cs
index 29329611..5ae3ac36 100644
--- a/Crow/src/Widgets/GenericStack.cs
+++ b/Crow/src/Widgets/GenericStack.cs
@@ -56,14 +56,26 @@ namespace Crow {
 				layoutType &= (~LayoutingType.Y);
 		}
 		public override int measureRawSize (LayoutingType lt) {
-			int totSpace = Math.Max (0, Spacing * (Children.Count (c => c.IsVisible) - 1));
-			if (lt == LayoutingType.Width) {
-				if (Orientation == Orientation.Horizontal)
-					return contentSize.Width + totSpace + 2 * Margin;
-			} else if (Orientation == Orientation.Vertical)
-				return contentSize.Height + totSpace + 2 * Margin;
+			DbgLogger.StartEvent(DbgEvtType.GOMeasure, this, lt);
+			try {
+
+				int totSpace = Math.Max (0, Spacing * (Children.Count (c => c.IsVisible) - 1));
+				if (lt == LayoutingType.Width) {
+					if (Orientation == Orientation.Horizontal)
+						//return contentSize.Width + totSpace + 2 * Margin;
+						return stretchedGO == null ?
+							contentSize.Width + totSpace + 2 * Margin :
+							contentSize.Width + stretchedGO.measureRawSize(lt) + totSpace + 2 * Margin;
+				} else if (Orientation == Orientation.Vertical)
+					//return contentSize.Height + totSpace + 2 * Margin;
+					return stretchedGO == null ?
+						contentSize.Height + totSpace + 2 * Margin :
+						contentSize.Height + stretchedGO.measureRawSize(lt) + totSpace + 2 * Margin;
 
-			return base.measureRawSize (lt);
+				return base.measureRawSize (lt);
+			} finally {
+				DbgLogger.EndEvent(DbgEvtType.GOMeasure);
+			}
 		}
 		public virtual void ComputeChildrenPositions () {
 			DbgLogger.StartEvent(DbgEvtType.GOComputeChildrenPositions, this);
@@ -76,6 +88,7 @@ namespace Crow {
 						c.Slot.X = d;
 						c.OnLayoutChanges (LayoutingType.X);
 						c.LastSlots.X = c.Slot.X;
+						IsDirty = true;
 					}
 					d += c.Slot.Width + Spacing;
 				}
@@ -87,11 +100,11 @@ namespace Crow {
 						c.Slot.Y = d;
 						c.OnLayoutChanges (LayoutingType.Y);
 						c.LastSlots.Y = c.Slot.Y;
+						IsDirty = true;
 					}
 					d += c.Slot.Height + Spacing;
 				}
-			}
-			IsDirty = true;
+			}			
 			DbgLogger.EndEvent(DbgEvtType.GOComputeChildrenPositions);
 		}
 		Widget stretchedGO = null;
@@ -99,16 +112,11 @@ namespace Crow {
 			RegisteredLayoutings &= (~layoutType);
 
 			if (layoutType == LayoutingType.ArrangeChildren) {
-				//allow 1 child to have size to 0 if stack has fixed or streched size policy,
+				//allow 1 child to have stretched size,
 				//this child will occupy remaining space
 				//if stack size policy is Fit, no child may have stretch enabled
 				//in the direction of stacking.
 				ComputeChildrenPositions ();
-
-				//if no layouting remains in queue for item, registre for redraw
-				if (RegisteredLayoutings == LayoutingType.None && IsDirty)
-					IFace.EnqueueForRepaint (this);
-
 				return true;
 			}
 
@@ -128,6 +136,7 @@ namespace Crow {
 			w.OnLayoutChanges (LayoutingType.Width);
 			w.LayoutChanged += OnChildLayoutChanges;
 			w.LastSlots.Width = w.Slot.Width;
+			DbgLogger.SetMsg(DbgEvtType.GOAdjustStretchedGo, $"new width={newW}");
 		}
 		protected void setChildHeight (Widget w, int newH) {
 			if (w.MaximumSize.Height > 0)
@@ -142,83 +151,90 @@ namespace Crow {
 			w.OnLayoutChanges (LayoutingType.Height);
 			w.LayoutChanged += OnChildLayoutChanges;
 			w.LastSlots.Height = w.Slot.Height;
+			DbgLogger.SetMsg(DbgEvtType.GOAdjustStretchedGo, $"new height={newH}");
 		}
-		internal void adjustStretchedGo (LayoutingType lt) {
+		internal void adjustStretchedGo (LayoutingType lt) {			
 			if (stretchedGO == null)
 				return;
+			//Console.WriteLine ($"adjust stretched go: {stretchedGO} {lt}");
+			DbgLogger.StartEvent(DbgEvtType.GOAdjustStretchedGo, this);
 			if (lt == LayoutingType.Width)
 				setChildWidth (stretchedGO, Math.Max (
 					ClientRectangle.Width - contentSize.Width - Spacing * (Children.Count - 1),	stretchedGO.MinimumSize.Width));				
 			else
 				setChildHeight (stretchedGO, Math.Max (
-					ClientRectangle.Height - contentSize.Height - Spacing * (Children.Count - 1), stretchedGO.MinimumSize.Height));			
+					ClientRectangle.Height - contentSize.Height - Spacing * (Children.Count - 1), stretchedGO.MinimumSize.Height));
+			DbgLogger.EndEvent(DbgEvtType.GOAdjustStretchedGo);
 		}
 
 		public override void OnChildLayoutChanges (object sender, LayoutingEventArgs arg) {
 			DbgLogger.StartEvent(DbgEvtType.GOOnChildLayoutChange, this);
-			Widget go = sender as Widget;
-			//Debug.WriteLine ("child layout change: " + go.LastSlots.ToString() + " => " + go.Slot.ToString());
-			switch (arg.LayoutType) {
-			case LayoutingType.Width:
-				if (Orientation == Orientation.Horizontal) {
-					if (go.Width == Measure.Stretched) {
-						if (stretchedGO == null && Width != Measure.Fit) {
-							stretchedGO = go;
-							contentSize.Width -= go.LastSlots.Width;
-						} else if (stretchedGO != go) {
-							go.Slot.Width = 0;
-							go.Width = Measure.Fit;
-							DbgLogger.EndEvent(DbgEvtType.GOOnChildLayoutChange);
-							return;
-						}
-					} else if (stretchedGO == go) {
-						stretchedGO = null;
-						contentSize.Width += go.Slot.Width;
-					} else
-						contentSize.Width += go.Slot.Width - go.LastSlots.Width;
+			try {
+				Widget go = sender as Widget;
+				switch (arg.LayoutType) {
+				case LayoutingType.Width:
+					if (Orientation == Orientation.Horizontal) {
+						if (go.Width == Measure.Stretched) {
+							if (stretchedGO == null && Width != Measure.Fit) {
+								stretchedGO = go;
+								contentSize.Width -= go.LastSlots.Width;
+								DbgLogger.SetMsg (DbgEvtType.GOOnChildLayoutChange, $"new stretched go: {stretchedGO}");
+							} else if (stretchedGO != go) {
+								go.Slot.Width = 0;
+								go.Width = Measure.Fit;
+								DbgLogger.SetMsg (DbgEvtType.GOOnChildLayoutChange, $"force stretched width to Fit: {go}");
+								return;
+							}
+						} else if (stretchedGO == go) {
+							stretchedGO = null;
+							contentSize.Width += go.Slot.Width;
+							DbgLogger.SetMsg (DbgEvtType.GOOnChildLayoutChange, $"reset stretched go");
+						} else
+							contentSize.Width += go.Slot.Width - go.LastSlots.Width;
 
+						adjustStretchedGo (LayoutingType.Width);
 
-					adjustStretchedGo (LayoutingType.Width);
+						if (Width == Measure.Fit)
+							this.RegisterForLayouting (LayoutingType.Width);
 
-					if (Width == Measure.Fit)
-						this.RegisterForLayouting (LayoutingType.Width);
-
-					this.RegisterForLayouting (LayoutingType.ArrangeChildren);
-					DbgLogger.EndEvent(DbgEvtType.GOOnChildLayoutChange);
-					return;
-				}
-				break;
-			case LayoutingType.Height:
-				if (Orientation == Orientation.Vertical) {
-					if (go.Height == Measure.Stretched) {
-						if (stretchedGO == null && Height != Measure.Fit) {
-							stretchedGO = go;
-							contentSize.Height -= go.LastSlots.Height;
-						} else if (stretchedGO != go) {
-							go.Slot.Height = 0;
-							go.Height = Measure.Fit;
-							DbgLogger.EndEvent(DbgEvtType.GOOnChildLayoutChange);
-							return;
-						}
-					} else if (stretchedGO == go) {
-						stretchedGO = null;
-						contentSize.Height += go.Slot.Height;
-					} else
-						contentSize.Height += go.Slot.Height - go.LastSlots.Height;
+						this.RegisterForLayouting (LayoutingType.ArrangeChildren);
+						return;
+					}
+					break;
+				case LayoutingType.Height:
+					if (Orientation == Orientation.Vertical) {
+						if (go.Height == Measure.Stretched) {
+							if (stretchedGO == null && Height != Measure.Fit) {
+								stretchedGO = go;
+								contentSize.Height -= go.LastSlots.Height;
+								DbgLogger.SetMsg (DbgEvtType.GOOnChildLayoutChange, $"new stretched go: {stretchedGO}");
+							} else if (stretchedGO != go) {
+								go.Slot.Height = 0;
+								go.Height = Measure.Fit;
+								DbgLogger.SetMsg (DbgEvtType.GOOnChildLayoutChange, $"force stretched width to Fit: {go}");
+								return;
+							}
+						} else if (stretchedGO == go) {
+							stretchedGO = null;
+							contentSize.Height += go.Slot.Height;
+							DbgLogger.SetMsg (DbgEvtType.GOOnChildLayoutChange, $"reset stretched go");
+						} else
+							contentSize.Height += go.Slot.Height - go.LastSlots.Height;
 
-					adjustStretchedGo (LayoutingType.Height);
+						adjustStretchedGo (LayoutingType.Height);
 
-					if (Height == Measure.Fit)
-						this.RegisterForLayouting (LayoutingType.Height);
+						if (Height == Measure.Fit)
+							this.RegisterForLayouting (LayoutingType.Height);
 
-					this.RegisterForLayouting (LayoutingType.ArrangeChildren);
-					DbgLogger.EndEvent(DbgEvtType.GOOnChildLayoutChange);
-					return;
+						this.RegisterForLayouting (LayoutingType.ArrangeChildren);
+						return;
+					}
+					break;
 				}
-				break;
+				base.OnChildLayoutChanges (sender, arg);
+			} finally {
+				DbgLogger.EndEvent(DbgEvtType.GOOnChildLayoutChange);
 			}
-			base.OnChildLayoutChanges (sender, arg);
-			DbgLogger.EndEvent(DbgEvtType.GOOnChildLayoutChange);
 		}
 		#endregion
 
diff --git a/Crow/src/Widgets/Group.cs b/Crow/src/Widgets/Group.cs
index 8b17b0da..e771426e 100644
--- a/Crow/src/Widgets/Group.cs
+++ b/Crow/src/Widgets/Group.cs
@@ -74,8 +74,7 @@ namespace Crow
 				contentSize.Height = g.LastSlots.Height;
 			}
 			
-			g.LayoutChanged += OnChildLayoutChanges;
-			g.RegisteredLayoutings = LayoutingType.None;
+			g.LayoutChanged += OnChildLayoutChanges;			
 			g.RegisterForLayouting (LayoutingType.Sizing | LayoutingType.ArrangeChildren);
 		}
 		public override void ClearChildren()
@@ -101,16 +100,21 @@ namespace Crow
 		#region GraphicObject overrides
 		public override int measureRawSize (LayoutingType lt)
 		{
-			if (Children.Count > 0) {
-				if (lt == LayoutingType.Width) {
-					//if (largestChild == null)
-						searchLargestChild ();					
-				} else {
-					//if (tallestChild == null)
-						searchTallestChild ();					
+			DbgLogger.StartEvent(DbgEvtType.GOMeasure, this, lt);
+			try {
+				if (Children.Count > 0) {
+					if (lt == LayoutingType.Width) {
+						//if (largestChild == null)
+							searchLargestChild ();					
+					} else {
+						//if (tallestChild == null)
+							searchTallestChild ();					
+					}
 				}
+				return base.measureRawSize (lt);
+			} finally {
+				DbgLogger.EndEvent(DbgEvtType.GOMeasure);
 			}
-			return base.measureRawSize (lt);
 		}
 
 		public override void OnLayoutChanges (LayoutingType layoutType)
@@ -163,8 +167,9 @@ namespace Crow
 						contentSize.Width = g.Slot.Width;
 					} else if (g == largestChild)
 						searchLargestChild ();
-					else
-						break;
+					/*else
+						Console.WriteLine ($"else: {g} largest:{largestChild} {g.RequiredLayoutings} {this.RequiredLayoutings} {largestChild?.RequiredLayoutings}");*/
+						/*break;*/
 					this.RegisterForLayouting (LayoutingType.Width);
 				}
 				break;
@@ -175,8 +180,8 @@ namespace Crow
 						contentSize.Height = g.Slot.Height;
 					} else if (g == tallestChild)
 						searchTallestChild ();
-					else
-						break;
+					/*else
+						break;*/
 					this.RegisterForLayouting (LayoutingType.Height);
 				}
 				break;
@@ -195,6 +200,7 @@ namespace Crow
 			childrenRWLock.EnterReadLock ();
 
 			try {
+				DbgLogger.SetMsg (DbgEvtType.GOSearchLargestChild, $"forced={forceMeasure}");
 
 				largestChild = null;
 				contentSize.Width = 0;
@@ -204,7 +210,7 @@ namespace Crow
 					int cw = 0;
 					if (forceMeasure)
 						cw = Children [i].measureRawSize (LayoutingType.Width);
-					else if (Children[i].Width.IsRelativeToParent || Children [i].RegisteredLayoutings.HasFlag (LayoutingType.Width))
+					else if (Children[i].Width.IsRelativeToParent || Children [i].RequiredLayoutings.HasFlag (LayoutingType.Width))
 						continue;
 					else
 						cw = Children [i].Slot.Width;
@@ -226,6 +232,8 @@ namespace Crow
 			childrenRWLock.EnterReadLock ();
 
 			try {
+				DbgLogger.SetMsg (DbgEvtType.GOSearchTallestChild, $"forced={forceMeasure}");
+
 				tallestChild = null;
 				contentSize.Height = 0;
 				for (int i = 0; i < Children.Count; i++) {
@@ -234,7 +242,7 @@ namespace Crow
 					int ch = 0;
 					if (forceMeasure)
 						ch = Children [i].measureRawSize (LayoutingType.Height);
-					else if (Children[i].Height.IsRelativeToParent || Children [i].RegisteredLayoutings.HasFlag (LayoutingType.Height))
+					else if (Children[i].Height.IsRelativeToParent || Children [i].RequiredLayoutings.HasFlag (LayoutingType.Height))
 						continue;
 					else
 						ch = Children [i].Slot.Height;
diff --git a/Crow/src/Widgets/GroupBase.cs b/Crow/src/Widgets/GroupBase.cs
index 7baf1ba4..752c98de 100644
--- a/Crow/src/Widgets/GroupBase.cs
+++ b/Crow/src/Widgets/GroupBase.cs
@@ -236,7 +236,7 @@ namespace Crow
 			try
 			{
 				for (int i = 0; i < Children.Count; i++) 
-					Children[i].Paint (gr);				
+					Children[i].Paint (gr);
 			} finally {
 				childrenRWLock.ExitReadLock ();
 			}
diff --git a/Crow/src/Widgets/ILayoutable.cs b/Crow/src/Widgets/ILayoutable.cs
index 5a03b7da..c9148668 100644
--- a/Crow/src/Widgets/ILayoutable.cs
+++ b/Crow/src/Widgets/ILayoutable.cs
@@ -20,6 +20,7 @@ namespace Crow
 
 		bool ArrangeChildren { get; }
 		LayoutingType RegisteredLayoutings { get; set; }
+		LayoutingType RequiredLayoutings { get; set; }
 		void ChildrenLayoutingConstraints(ILayoutable layoutable, ref LayoutingType layoutType);
 		void RegisterForLayouting(LayoutingType layoutType);
 		void RegisterClip(Rectangle clip);
diff --git a/Crow/src/Widgets/Label.cs b/Crow/src/Widgets/Label.cs
index 5ca6edf2..c2c68648 100644
--- a/Crow/src/Widgets/Label.cs
+++ b/Crow/src/Widgets/Label.cs
@@ -156,7 +156,7 @@ namespace Crow
                     return;
 
 				int oldTextLength = string.IsNullOrEmpty (_text) ? 0 : _text.Length;
-				lock (linesMutex) {					
+				lock (linesMutex) {
 					_text = value;
 					getLines ();
 					textMeasureIsUpToDate = false;
diff --git a/Crow/src/Widgets/PrivateContainer.cs b/Crow/src/Widgets/PrivateContainer.cs
index c2f44816..d7d269b4 100644
--- a/Crow/src/Widgets/PrivateContainer.cs
+++ b/Crow/src/Widgets/PrivateContainer.cs
@@ -59,8 +59,7 @@ namespace Crow
 			if (child != null) {
 				child.Parent = this;
 				child.LayoutChanged += OnChildLayoutChanges;
-				contentSize = child.Slot.Size;
-				child.RegisteredLayoutings = LayoutingType.None;
+				contentSize = child.Slot.Size;				
 				child.RegisterForLayouting (LayoutingType.Sizing);
 			}
 		}
@@ -103,20 +102,26 @@ namespace Crow
 
 		public override int measureRawSize (LayoutingType lt)
 		{
-			if (child != null) {
-				//force measure of child if sizing on children and child has stretched size
-				switch (lt) {
-				case LayoutingType.Width:
-					if (child.Width.IsRelativeToParent)
-						contentSize.Width = child.measureRawSize (LayoutingType.Width);
-					break;
-				case LayoutingType.Height:
-					if (child.Height.IsRelativeToParent)
-						contentSize.Height = child.measureRawSize (LayoutingType.Height);
-					break;
+			DbgLogger.StartEvent(DbgEvtType.GOMeasure, this, lt);
+			try {
+				if (child != null) {
+					//force measure of child if sizing on children and child has stretched size
+					switch (lt) {
+					case LayoutingType.Width:
+						if (child.Width.IsRelativeToParent)
+							contentSize.Width = child.measureRawSize (LayoutingType.Width);
+						break;
+					case LayoutingType.Height:
+						if (child.Height.IsRelativeToParent)
+							contentSize.Height = child.measureRawSize (LayoutingType.Height);
+						break;
+					}
+					DbgLogger.SetMsg(DbgEvtType.GOMeasure, $"{lt} contentSize:{contentSize}");					
 				}
+				return base.measureRawSize (lt);
+			} finally {
+				DbgLogger.EndEvent(DbgEvtType.GOMeasure);
 			}
-			return base.measureRawSize (lt);
 		}
 		public override bool UpdateLayout (LayoutingType layoutType)
 		{
diff --git a/Crow/src/Widgets/ScrollBar.cs b/Crow/src/Widgets/ScrollBar.cs
index 8ef519f1..ebec12f1 100644
--- a/Crow/src/Widgets/ScrollBar.cs
+++ b/Crow/src/Widgets/ScrollBar.cs
@@ -26,13 +26,16 @@ namespace Crow
 			set {
 				if (cursorRatio == value)
 					return;
-				cursorRatio = value;
+				if (double.IsFinite(value))
+					cursorRatio = value;
+				else
+					cursorRatio = -1;
 				updateCursor ();
 			}
         }
 
 		void updateCursor () {
-			if (cursorRatio < 0)
+			if (cursorRatio < 0 || !double.IsFinite(cursorRatio))
 				return;
 			ILayoutable l = cursor?.Parent;
 			if (l == null)
diff --git a/Crow/src/Widgets/TableRow.cs b/Crow/src/Widgets/TableRow.cs
index 1f646bcb..fbb0e7c4 100644
--- a/Crow/src/Widgets/TableRow.cs
+++ b/Crow/src/Widgets/TableRow.cs
@@ -107,9 +107,14 @@ namespace Crow
 		}
 		public override int measureRawSize (LayoutingType lt)
 		{
-			if (lt == LayoutingType.Height && Children.Count > 0 && tallestChild == null)
-				searchTallestChild ();					
-			return base.measureRawSize (lt);
+			DbgLogger.StartEvent(DbgEvtType.GOMeasure, this);
+			try {			
+				if (lt == LayoutingType.Height && Children.Count > 0 && tallestChild == null)
+					searchTallestChild ();					
+				return base.measureRawSize (lt);
+			} finally {
+				DbgLogger.EndEvent(DbgEvtType.GOMeasure);	
+			}
 		}		
 		public override void OnLayoutChanges (LayoutingType layoutType)
 		{
@@ -166,7 +171,7 @@ namespace Crow
 					int ch = 0;
 					if (forceMeasure)
 						ch = Children [i].measureRawSize (LayoutingType.Height);
-					else if (Children [i].RegisteredLayoutings.HasFlag (LayoutingType.Height))
+					else if (Children [i].RequiredLayoutings.HasFlag (LayoutingType.Height))
 						continue;
 					else
 						ch = Children [i].Slot.Height;
diff --git a/Crow/src/Widgets/TemplatedContainer.cs b/Crow/src/Widgets/TemplatedContainer.cs
index c51ea3eb..5977203c 100644
--- a/Crow/src/Widgets/TemplatedContainer.cs
+++ b/Crow/src/Widgets/TemplatedContainer.cs
@@ -42,6 +42,7 @@ namespace Crow
 				if (_contentContainer == null)
 					throw new Exception ("TemplatedContainer template Must contain a Container named 'Content'");
 				_contentContainer.SetChild(value);
+				value.LogicalParent = this;
 				NotifyValueChanged ("HasContent", HasContent);
 			}
 		}
diff --git a/Crow/src/Widgets/TemplatedControl.cs b/Crow/src/Widgets/TemplatedControl.cs
index 7c804651..3d0d4258 100644
--- a/Crow/src/Widgets/TemplatedControl.cs
+++ b/Crow/src/Widgets/TemplatedControl.cs
@@ -98,9 +98,8 @@ namespace Crow
 				CairoHelpers.CairoRectangle (gr, ClientRectangle, CornerRadius);
 				gr.Clip ();
 			}
-
-			if (child != null)
-				child.Paint (gr);
+			
+			child?.Paint (gr);
 
 			gr.Restore ();
 
diff --git a/Crow/src/Widgets/TemplatedGroup.cs b/Crow/src/Widgets/TemplatedGroup.cs
index 601e2183..2ebede8e 100644
--- a/Crow/src/Widgets/TemplatedGroup.cs
+++ b/Crow/src/Widgets/TemplatedGroup.cs
@@ -513,6 +513,9 @@ namespace Crow {
 				Monitor.Exit (IFace.UpdateMutex);
 			}
 
+			if (g is ISelectable li)
+				li.Selected += Li_Selected;
+
 			if (iTemp.Expand != null) {
 				IToggle toggle = g as IToggle;
 				
@@ -521,16 +524,10 @@ namespace Crow {
 					
 				if (toggle != null) { 
 					toggle.ToggleOn += iTemp.Expand;
-					if (o is ICollection)
-						toggle.IsToggleable = iTemp.HasSubItems;
-					else
-						toggle.IsToggleable = new BooleanTestOnInstance ((instance) => true);
+					toggle.IsToggleable = iTemp.HasSubItems;
 				}
 			}
 
-			if (g is ISelectable li)
-				li.Selected += Li_Selected;
-
 			g.DataSource = o;
 		}
 
diff --git a/Crow/src/Widgets/Widget.cs b/Crow/src/Widgets/Widget.cs
index 7255ca45..d595e164 100644
--- a/Crow/src/Widgets/Widget.cs
+++ b/Crow/src/Widgets/Widget.cs
@@ -28,7 +28,7 @@ namespace Crow
 	/// </summary>
 	public class Widget : ILayoutable, IValueChange, IDisposable
 	{
-		internal ReaderWriterLockSlim parentRWLock = new ReaderWriterLockSlim();
+		internal ReaderWriterLockSlim parentRWLock = new ReaderWriterLockSlim(LockRecursionPolicy.SupportsRecursion);
 #if DEBUG_LOG
 		//0 is the main graphic tree, for other obj tree not added to main tree, it range from 1->n
 		//useful to track events for obj shown later, not on start, or never added to main tree
@@ -210,12 +210,14 @@ namespace Crow
 		/// </summary>
 		public virtual void NotifyValueChanged(string MemberName, object _value)
 		{
+			DbgLogger.AddEventWithMsg (DbgEvtType.GOSetProperty, $"{MemberName} = {_value}", this);
 			//Debug.WriteLine ("Value changed: {0}->{1} = {2}", this, MemberName, _value);
 			if (ValueChanged != null)
 				ValueChanged.Invoke(this, new ValueChangeEventArgs(MemberName, _value));
 		}
 		public void NotifyValueChangedAuto (object _value, [CallerMemberName] string caller = null)
 		{
+			DbgLogger.AddEventWithMsg (DbgEvtType.GOSetProperty, $"{caller} = {_value}", this);
 			if (ValueChanged != null)
 				NotifyValueChanged (caller, _value);
 		}
@@ -264,6 +266,7 @@ namespace Crow
 		}
 		#region private fields
 		LayoutingType registeredLayoutings;// = LayoutingType.Sizing;
+		LayoutingType requiredLayoutings = LayoutingType.Sizing;
 		ILayoutable logicalParent;
 		ILayoutable parent;
 		string name;
@@ -278,7 +281,7 @@ namespace Crow
 		bool hasFocus;
 		bool isActive;
 		bool isHover;
-		bool bubbleMouseEvent;
+		DeviceEventType bubbledEvents;
 		bool mouseRepeat;
 		bool stickyMouseEnabled;
 		int stickyMouse;
@@ -336,7 +339,14 @@ namespace Crow
 		#endregion
 
 		#region ILayoutable
-		[XmlIgnore]public LayoutingType RegisteredLayoutings { get => registeredLayoutings; set => registeredLayoutings = value; }
+		[XmlIgnore]public LayoutingType RegisteredLayoutings {
+			get => registeredLayoutings;
+			set => registeredLayoutings = value;
+		}
+		[XmlIgnore]public LayoutingType RequiredLayoutings {
+			get => requiredLayoutings;
+			set => requiredLayoutings = value;
+		}
 		//TODO: it would save the recurent cost of a cast in event bubbling if parent type was GraphicObject
 		//		or we could add to the interface the mouse events
 		/// <summary>
@@ -414,7 +424,7 @@ namespace Crow
 				return default(Rectangle);
 			}
 		}
-		public virtual Rectangle getSlot () { return Slot;}
+		public virtual Rectangle getSlot () => Slot;
 		#endregion
 		public Point ScreenPointToLocal(Point p){
 			Point pt = p - ScreenCoordinates (Slot).TopLeft - ClientRectangle.TopLeft;
@@ -757,14 +767,14 @@ namespace Crow
 		/// if false, prevent mouse events to bubble to the parent in any case.
 		/// </summary>
 		[DesignCategory ("Behaviour")]
-		[DefaultValue (true)]
-		public virtual bool BubbleMouseEvent {
-			get => bubbleMouseEvent;
+		[DefaultValue (DeviceEventType.All)]
+		public virtual DeviceEventType BubbleMouseEvent {
+			get => bubbledEvents;
 			set {
-				if (bubbleMouseEvent == value)
+				if (bubbledEvents == value)
 					return;
-				bubbleMouseEvent = value;
-				NotifyValueChangedAuto (bubbleMouseEvent);
+				bubbledEvents = value;
+				NotifyValueChangedAuto (bubbledEvents);
 			}
 		}
 		/// <summary>
@@ -1267,9 +1277,12 @@ namespace Crow
 				}
 			}
 			if (styleIndex >= 0) {
-				if (pi.PropertyType.IsEnum)//maybe should be in parser..
-					defaultValue = Enum.Parse (pi.PropertyType, (string)styling [styleIndex] [pi.Name], true);
-				else
+				if (pi.PropertyType.IsEnum) {//maybe should be in parser..
+					if (EnumsNET.FlagEnums.IsFlagEnum (pi.PropertyType))
+						defaultValue = EnumsNET.FlagEnums.ParseFlags (pi.PropertyType, (string)styling [styleIndex] [pi.Name], true, "|");
+					else
+						defaultValue = EnumsNET.Enums.Parse (pi.PropertyType, (string)styling [styleIndex] [pi.Name], true);
+				}else
 					defaultValue = styling [styleIndex] [pi.Name];
 
 #if DESIGN_MODE
@@ -1474,8 +1487,9 @@ namespace Crow
 			if (parent != null) {					
 				parent.RegisterClip (LastPaintedSlot);
 				parent.RegisterClip (Slot);
-			}//else
-				//Console.WriteLine ($"clipping reg canceled (no parent): {this.ToString()}");
+			}else {
+				DbgLogger.SetMsg (DbgEvtType.GOClippingRegistration, "clipping reg canceled (no parent)");
+			}
 			parentRWLock.ExitReadLock ();
 
 			DbgLogger.EndEvent (DbgEvtType.GOClippingRegistration);
@@ -1489,13 +1503,13 @@ namespace Crow
 				DbgLogger.AddEvent (DbgEvtType.AlreadyDisposed | DbgEvtType.GORegisterClip, this);
 				return;
 			}
-			//we register clip in the parent, if it's dirty, all children will be redrawn
-			if (IsDirty && CacheEnabled) {
-				//Console.WriteLine ($"regclip canceled Dirty:{IsDirty} Cached:{CacheEnabled}: {this.ToString()}");
-				return;			
-			}
 			DbgLogger.StartEvent(DbgEvtType.GORegisterClip, this);
 			try {
+				//we register clip in the parent, if it's dirty, all children will be redrawn
+				if (IsDirty && CacheEnabled) {
+					DbgLogger.SetMsg (DbgEvtType.GORegisterClip, $"regclip canceled Dirty:{IsDirty} Cached:{CacheEnabled}");
+					return;			
+				}
 				Rectangle cb = ClientRectangle;
 				Rectangle  r = clip + cb.Position;
 				/*if (r.Right > cb.Right)
@@ -1503,13 +1517,13 @@ namespace Crow
 				if (r.Bottom > cb.Bottom)
 					r.Height -= r.Bottom - cb.Bottom;*/
 				if (r.Width < 0 || r.Height < 0){
-					//Console.WriteLine ($"regclip canceled size w:{r.Width} h:{r.Height}: {this.ToString()}");
+					DbgLogger.SetMsg (DbgEvtType.GORegisterClip, $"regclip canceled size w:{r.Width} h:{r.Height}");
 					return;			
 				}
 				if (cacheEnabled)
 					Clipping.UnionRectangle (r);
 				if (Parent == null){
-					//Console.WriteLine ($"clip chain aborded (no parent): {this.ToString()}");
+					DbgLogger.SetMsg (DbgEvtType.GORegisterClip, "clip chain aborded (no parent)");
 					return;			
 				}
 				/*Widget p = Parent as Widget;
@@ -1535,8 +1549,8 @@ namespace Crow
 			IsDirty = true;			
 			if (Width.IsFit || Height.IsFit)
 				RegisterForLayouting (LayoutingType.Sizing);
-			else if (RegisteredLayoutings == LayoutingType.None)
-				IFace.EnqueueForRepaint (this);
+			else
+				RegisterForRedraw ();
 
 			DbgLogger.EndEvent(DbgEvtType.GORegisterForGraphicUpdate);
 		}
@@ -1549,8 +1563,7 @@ namespace Crow
 				return;
 			}
 			IsDirty = true;
-			if (RegisteredLayoutings == LayoutingType.None)
-				IFace.EnqueueForRepaint (this);
+			RegisterForRepaint ();
 		}
 		/// <summary>
 		/// query a repaint, if control is cached, cache will not be updated and simply repainted.
@@ -1564,7 +1577,7 @@ namespace Crow
 		/// 
 		/// </remark>
 		public void RegisterForRepaint () {
-			if (RegisteredLayoutings == LayoutingType.None && !IsDirty)
+			if (RequiredLayoutings == LayoutingType.None)// && !IsDirty)
 				IFace.EnqueueForRepaint (this);
 		}
 		#endregion
@@ -1573,13 +1586,14 @@ namespace Crow
 
 		/// <summary> return size of content + margins </summary>
 		public virtual int measureRawSize (LayoutingType lt) {
-			DbgLogger.StartEvent(DbgEvtType.GOMeasure, this, lt);
-
-			int tmp = lt == LayoutingType.Width ?
-				contentSize.Width + 2 * margin: contentSize.Height + 2 * margin;
-
-			DbgLogger.EndEvent(DbgEvtType.GOMeasure);
-			return tmp;
+			DbgLogger.StartEvent(DbgEvtType.GOMeasure, this);
+			try {
+				DbgLogger.SetMsg(DbgEvtType.GOMeasure, $"{lt} contentSize:{contentSize}");
+				return lt == LayoutingType.Width ?
+					contentSize.Width + 2 * margin : contentSize.Height + 2 * margin;
+			} finally {
+				DbgLogger.EndEvent(DbgEvtType.GOMeasure);	
+			}
 		}
 
 		internal bool firstUnresolvedFitWidth (out  Widget ancestorInUnresolvedFit)
@@ -1595,8 +1609,32 @@ namespace Crow
 			}
 			return false;
 		}
+		protected bool stretchedInFit (LayoutingType lt) {			
+			
+			if (Parent == null)
+				return false;
+			Widget p = Parent as Widget;
+			if (lt == LayoutingType.Width) {
+				if (!Width.IsRelativeToParent)
+					return false;				
+				while (p.Width.IsRelativeToParent) {
+					p = p.Parent as Widget;
+					if (p == null)
+						return false;
+				}
+				return p.Width.IsFit;
+			}
+			if (!Height.IsRelativeToParent)
+				return false;			
+			while (p.Height.IsRelativeToParent) {
+				p = p.Parent as Widget;
+				if (p == null)
+					return false;
+			}
+			return p.Height.IsFit;
+		}
 
-		public virtual bool ArrangeChildren { get { return false; } }
+		public virtual bool ArrangeChildren => false;
 		/// <summary>
 		/// Used to prevent some layouting type in children. For example, in the GenericStack,
 		/// x layouting is dismissed in the direction of the stacking to let the parent
@@ -1606,17 +1644,25 @@ namespace Crow
 		/// <param name="layoutType">The currently registering layouting types</param>		
 		public virtual void ChildrenLayoutingConstraints(ILayoutable layoutable, ref LayoutingType layoutType){	}
 		/// <summary> Query a layouting for the type pass as parameter, redraw only if layout changed. </summary>
+		
+		internal ReaderWriterLockSlim layoutMutex = new ReaderWriterLockSlim (LockRecursionPolicy.SupportsRecursion);
 		public virtual void RegisterForLayouting(LayoutingType layoutType){
 			if (disposed) {
 				DbgLogger.AddEvent (DbgEvtType.AlreadyDisposed, this);
 				return;
 			}
 
-			if (Parent == null)
-				return;
-			DbgLogger.StartEvent (DbgEvtType.GOLockLayouting, this);
+			parentRWLock.EnterReadLock ();			
+
 			try {
-				lock (IFace.LayoutMutex) {
+				if (Parent == null)
+					return;
+
+				layoutMutex.EnterWriteLock ();
+
+				try {
+						
+				
 					//prevent queueing same LayoutingType for this
 					layoutType &= (~RegisteredLayoutings);
 
@@ -1641,20 +1687,30 @@ namespace Crow
 					if (layoutType == LayoutingType.None)
 						return;
 
-					//enqueue LQI LayoutingTypes separately
-					if (layoutType.HasFlag (LayoutingType.Width))
-						IFace.LayoutingQueue.Enqueue (new LayoutingQueueItem (LayoutingType.Width, this));
-					if (layoutType.HasFlag (LayoutingType.Height))
-						IFace.LayoutingQueue.Enqueue (new LayoutingQueueItem (LayoutingType.Height, this));
-					if (layoutType.HasFlag (LayoutingType.X))
-						IFace.LayoutingQueue.Enqueue (new LayoutingQueueItem (LayoutingType.X, this));
-					if (layoutType.HasFlag (LayoutingType.Y))
-						IFace.LayoutingQueue.Enqueue (new LayoutingQueueItem (LayoutingType.Y, this));
-					if (layoutType.HasFlag (LayoutingType.ArrangeChildren))
-						IFace.LayoutingQueue.Enqueue (new LayoutingQueueItem (LayoutingType.ArrangeChildren, this));
+					RequiredLayoutings |= layoutType;
+				} finally {
+					layoutMutex.ExitWriteLock ();					
 				}
-			} finally {
+
+				DbgLogger.StartEvent (DbgEvtType.GOLockLayouting, this);
+					lock (IFace.LayoutMutex) {
+						layoutMutex.EnterWriteLock ();
+						//enqueue LQI LayoutingTypes separately
+						if (layoutType.HasFlag (LayoutingType.Width))
+							IFace.LayoutingQueue.Enqueue (new LayoutingQueueItem (LayoutingType.Width, this));
+						if (layoutType.HasFlag (LayoutingType.Height))
+							IFace.LayoutingQueue.Enqueue (new LayoutingQueueItem (LayoutingType.Height, this));
+						if (layoutType.HasFlag (LayoutingType.X))
+							IFace.LayoutingQueue.Enqueue (new LayoutingQueueItem (LayoutingType.X, this));
+						if (layoutType.HasFlag (LayoutingType.Y))
+							IFace.LayoutingQueue.Enqueue (new LayoutingQueueItem (LayoutingType.Y, this));
+						if (layoutType.HasFlag (LayoutingType.ArrangeChildren))
+							IFace.LayoutingQueue.Enqueue (new LayoutingQueueItem (LayoutingType.ArrangeChildren, this));
+						layoutMutex.ExitWriteLock ();
+					}
 				DbgLogger.EndEvent (DbgEvtType.GOLockLayouting);
+			} finally {
+				parentRWLock.ExitReadLock ();
 			}
 		}
 
@@ -1698,8 +1754,8 @@ namespace Crow
 			case LayoutingType.X:
 				if (left == 0) {
 
-					if (Parent.RegisteredLayoutings.HasFlag (LayoutingType.Width) ||
-					    RegisteredLayoutings.HasFlag (LayoutingType.Width))
+					if (Parent.RequiredLayoutings.HasFlag (LayoutingType.Width) ||
+					    RequiredLayoutings.HasFlag (LayoutingType.Width))
 						return false;
 
 					switch (horizontalAlignment) {
@@ -1728,8 +1784,8 @@ namespace Crow
 			case LayoutingType.Y:
 				if (top == 0) {
 
-					if (Parent.RegisteredLayoutings.HasFlag (LayoutingType.Height) ||
-					    RegisteredLayoutings.HasFlag (LayoutingType.Height))
+					if (Parent.RequiredLayoutings.HasFlag (LayoutingType.Height) ||
+					    RequiredLayoutings.HasFlag (LayoutingType.Height))
 						return false;
 
 					switch (verticalAlignment) {
@@ -1825,10 +1881,6 @@ namespace Crow
 				break;
 			}
 
-			//if no layouting remains in queue for item, registre for redraw
-			if (this.registeredLayoutings == LayoutingType.None && IsDirty)
-				IFace.EnqueueForRepaint (this);
-
 			return true;
 		}
 		#endregion
@@ -1903,8 +1955,8 @@ namespace Crow
 		/// of the widget </summary>
 		public virtual void Paint (Context ctx)
 		{
-			/*if (!IsVisible)
-				return;*/
+			if (!IsVisible)
+				return;
 
 			DbgLogger.StartEvent (DbgEvtType.GOPaint, this);
 
@@ -1912,19 +1964,12 @@ namespace Crow
 
 			if (disposed || Slot.Height < 0 || Slot.Width < 0 || parent == null){
 #if DEBUG
-				Console.ForegroundColor = ConsoleColor.Red;
 				if (disposed)
-					System.Diagnostics.Debug.WriteLine ($"Paint disposed widget: {this}");
-				Console.ForegroundColor = ConsoleColor.DarkRed;
+					DbgLogger.SetMsg (DbgEvtType.GOPaint, "Paint disposed widget");
 				if (Slot.Height < 0 || Slot.Width < 0)
-					System.Diagnostics.Debug.WriteLine ($"Paint slot invalid ({Slot}): {this}");
-				Console.ForegroundColor = ConsoleColor.DarkMagenta;
+					DbgLogger.SetMsg (DbgEvtType.GOPaint, $"Paint slot invalid ({Slot})");
 				if (parent == null)
-					System.Diagnostics.Debug.WriteLine ($"Paint with parent == null: {this}");
-				Console.ForegroundColor = ConsoleColor.Magenta;
-				if (!isVisible)
-					System.Diagnostics.Debug.WriteLine ($"Paint invisible widget: {this}");
-				Console.ResetColor ();
+					DbgLogger.SetMsg (DbgEvtType.GOPaint, "Paint with no parent");
 #endif
 				DbgLogger.AddEvent (DbgEvtType.Warning);
 				DbgLogger.EndEvent (DbgEvtType.GOPaint);
@@ -2041,7 +2086,7 @@ namespace Crow
 
 			if (MouseMove != null)
 				MouseMove.Invoke (this, e);			
-			else if (!e.Handled && BubbleMouseEvent)
+			else if (!e.Handled && BubbleMouseEvent.HasFlag (DeviceEventType.MouseMove))
 				FocusParent?.onMouseMove (sender, e);
 		}
 		/// <summary>
@@ -2065,7 +2110,7 @@ namespace Crow
 
 			if (MouseDown != null)
 				MouseDown?.Invoke (this, e);
-			else if (!e.Handled && BubbleMouseEvent)
+			else if (!e.Handled && BubbleMouseEvent.HasFlag (DeviceEventType.ButtonDown))
 				FocusParent?.onMouseDown (sender, e);
 		}
 		/// <summary>
@@ -2080,7 +2125,7 @@ namespace Crow
 
 			if (MouseUp != null)
 				MouseUp.Invoke (this, e);
-			else if (!e.Handled && BubbleMouseEvent)
+			else if (!e.Handled && BubbleMouseEvent.HasFlag (DeviceEventType.ButtonUp))
 				FocusParent?.onMouseUp (sender, e);
 		}
 		/// <summary>
@@ -2091,7 +2136,7 @@ namespace Crow
 		public virtual void onMouseClick(object sender, MouseButtonEventArgs e){
 			if (MouseClick != null)
 				MouseClick.Invoke (this, e);
-			else if (!e.Handled && BubbleMouseEvent)
+			else if (!e.Handled && BubbleMouseEvent.HasFlag (DeviceEventType.MouseClick))
 				FocusParent?.onMouseClick (sender, e);
 		}
 		/// <summary>
@@ -2103,13 +2148,13 @@ namespace Crow
 		public virtual void onMouseDoubleClick(object sender, MouseButtonEventArgs e){
 			if (MouseDoubleClick != null)			
 				MouseDoubleClick.Invoke (this, e);
-			else if (!e.Handled && BubbleMouseEvent)
+			else if (!e.Handled && BubbleMouseEvent.HasFlag (DeviceEventType.MouseClick))
 				FocusParent?.onMouseDoubleClick (sender, e);
 		}
 		public virtual void onMouseWheel(object sender, MouseWheelEventArgs e){
 			if (MouseWheelChanged != null)
 				MouseWheelChanged.Invoke (this, e);
-			else if (!e.Handled && BubbleMouseEvent)
+			else if (!e.Handled && BubbleMouseEvent.HasFlag (DeviceEventType.MouseWheel))
 				FocusParent?.onMouseWheel (sender, e);
 		}
 		public virtual void onMouseEnter(object sender, MouseMoveEventArgs e)
@@ -2155,7 +2200,7 @@ namespace Crow
 			Disabled.Raise (this, e);
 		}
 		protected virtual void onParentChanged(object sender, DataSourceChangeEventArgs e) {
-			DbgLogger.AddEvent (DbgEvtType.GONewParent, this, e);
+			DbgLogger.AddEvent (DbgEvtType.GONewParent, this, e.NewDataSource);
 			ParentChanged.Raise (this, e);
 			if (logicalParent == null)
 				LogicalParentChanged.Raise (this, e);
@@ -2210,10 +2255,13 @@ namespace Crow
 			}
 				
 
-			if (IFace.ActiveWidget != null) {
-				if (IFace.ActiveWidget.IsOrIsInside (this))
-					IFace.ActiveWidget = null;
-			}
+			/*if (IFace.ActiveWidget != null) {
+				if (IsActive) {
+
+
+				} else if (this.Contains (IFace.ActiveWidget))
+					IFace.ActiveWidget = this;
+			}*/
 			if (IFace.FocusedWidget != null) {
 				if (IFace.FocusedWidget.IsOrIsInside (this))
 					IFace.FocusedWidget = null;
diff --git a/Crow/src/Widgets/Window.cs b/Crow/src/Widgets/Window.cs
index 07b575b0..6540a305 100644
--- a/Crow/src/Widgets/Window.cs
+++ b/Crow/src/Widgets/Window.cs
@@ -22,7 +22,13 @@ namespace Crow
 			SW,
 			SE,
 		}
-
+		[Flags]
+		public enum Status {
+			None = 0x00,
+			Normal = 0x01,
+			Minimized = 0x02,
+			Maximized= 0x04
+		}
 		string _icon;
 		bool resizable;
 		bool movable;
@@ -30,51 +36,203 @@ namespace Crow
 		bool alwaysOnTop = false;
 
 		Rectangle savedBounds;
-		bool _minimized = false;
+		bool wasResizable;
+		
+		Status currentState, allowedStates;
 
 		protected Direction currentDirection = Direction.None;
 
+
 		#region Events
 		public event EventHandler Closing;
 		public event EventHandler Maximized;
 		public event EventHandler Unmaximized;
 		public event EventHandler Minimize;
 		#endregion
+		[DefaultValue("Normal|Minimized|Maximized")]
+		public Status AllowedStates {
+			get => allowedStates;
+			set {
+				if (allowedStates == value)
+					return;				
+				allowedStates = value;
+				NotifyValueChangedAuto (allowedStates);
+
+				if (currentState == Status.None)
+					return;
+
+				initCommands();
+
+				if (allowedStates.HasFlag (currentState)) {
+					CMDNormalize.CanExecute = currentState != Status.Normal & allowedStates.HasFlag (Status.Normal);
+					CMDMinimize.CanExecute = currentState != Status.Minimized & allowedStates.HasFlag (Status.Minimized);
+					CMDMaximize.CanExecute = currentState != Status.Maximized & allowedStates.HasFlag (Status.Maximized);
+				} else {
+					if (allowedStates.HasFlag (Status.Normal))
+						CurrentState = Status.Normal;
+					else if (allowedStates.HasFlag (Status.Maximized))
+						CurrentState = Status.Maximized;
+					else
+						CurrentState = Status.Minimized;
+				}
+			}
+		}
+		[DefaultValue("Normal")]
+		public Status CurrentState {
+			get => currentState;
+			set {			
+				Status newState = value;
+				if (!allowedStates.HasFlag (newState)) {
+					if (allowedStates.HasFlag (Status.Normal))
+						newState = Status.Normal;
+					else if (allowedStates.HasFlag (Status.Maximized))
+						newState = Status.Maximized;
+					else
+						newState = Status.Minimized;
+				}
+
+				if (currentState == newState)
+					return;
+
+				if (currentState == Status.Normal) {
+					savedBounds = LastPaintedSlot;
+					wasResizable = Resizable;
+				}				
+
+				currentState = value;
+				NotifyValueChangedAuto (currentState);
+
+				initCommands();
+
+				switch (currentState) {
+				case Status.Maximized:
+					Left = Top = 0;
+					RegisterForLayouting (LayoutingType.Positioning);
+					Width = Height = Measure.Stretched;
+					Resizable = false;
+					CMDNormalize.CanExecute = allowedStates.HasFlag (Status.Normal);
+					CMDMinimize.CanExecute = allowedStates.HasFlag (Status.Minimized);
+					CMDMaximize.CanExecute = false;
+					break;
+				case Status.Minimized:
+					Width = 200;
+					Height = 20;
+					Resizable = false;					
+					CMDNormalize.CanExecute = allowedStates.HasFlag (Status.Normal);
+					CMDMinimize.CanExecute = false;
+					CMDMaximize.CanExecute = allowedStates.HasFlag (Status.Maximized);
+					break;
+				case Status.Normal:
+					Left = savedBounds.Left;
+					Top = savedBounds.Top;
+					Width = savedBounds.Width;
+					Height = savedBounds.Height;
+					Resizable = wasResizable;
+					CMDNormalize.CanExecute = false;
+					CMDMinimize.CanExecute = allowedStates.HasFlag (Status.Minimized);
+					CMDMaximize.CanExecute = allowedStates.HasFlag (Status.Maximized);
+					break;
+				}
+			}
+		}
 
 		#region CTOR
 		protected Window() {}
-		public Window (Interface iface, string style = null) : base (iface, style) { }
+		public Window (Interface iface, string style = null) : base (iface, style) {}
 		#endregion
 
 		Widget moveHandle, sizingHandle;
 
+		public Command CMDMinimize, CMDMaximize, CMDNormalize, CMDClose;
+		CommandGroup commands;
+
+		public CommandGroup Commands {
+			get => commands;
+			set {
+				if (commands == value)
+					return;
+				commands = value;
+				NotifyValueChangedAuto (commands);
+			}
+		}
+		/*public Command CMDMinimize = new Command ("Minimize", (sender) =>
+			{(sender as Window).CurrentState = Status.Minimized;}, "#Crow.Icons.minimize.svg", false);
+		public Command CMDMaximize = new Command ("Maximize", (sender) => 
+			{(sender as Window).CurrentState = Status.Maximized;}, "#Crow.Icons.maximize.svg", false);
+		public Command CMDNormalize = new Command ("Normalize", (sender) => 
+			{(sender as Window).CurrentState = Status.Normal;}, "#Crow.Icons.normalize.svg", false);
+		public Command CMDClose = new Command ("Close", (sender) => 
+			{(sender as Window).close ();}, "#Crow.Icons.exit2.svg", true);*/
+
+
+		void initCommands () {
+			if (CMDMinimize != null)
+				return;
+			CMDMinimize = new Command ("Minimize", () => CurrentState = Status.Minimized, "#Crow.Icons.minimize.svg", allowedStates.HasFlag (Status.Minimized));
+			CMDMaximize = new Command ("Maximize", () => CurrentState = Status.Maximized, "#Crow.Icons.maximize.svg", allowedStates.HasFlag (Status.Maximized));
+			CMDNormalize = new Command ("Normalize", () => CurrentState = Status.Normal, "#Crow.Icons.normalize.svg", false);
+			CMDClose = new Command ("Close", close, "#Crow.Icons.exit2.svg", true);
+
+			Commands = new CommandGroup(CMDMinimize, CMDNormalize, CMDMaximize, CMDClose);
+		}
+
+
 
 		#region TemplatedContainer overrides
 		protected override void loadTemplate(Widget template = null)
 		{
+			initCommands ();
+
 			base.loadTemplate (template);
 
-			NotifyValueChanged ("ShowNormal", false);
-			NotifyValueChanged ("ShowMinimize", true);
-			NotifyValueChanged ("ShowMaximize", true);
+			initHandles ();
+		}
 
+		protected void initHandles () {
 			moveHandle = child?.FindByName ("MoveHandle");
 			sizingHandle = child?.FindByName ("SizeHandle");
 
-			if (sizingHandle == null)
-				return;			
-            //sizingHandle.Unhover += (arg1, arg2) => currentDirection = Direction.None;
-            sizingHandle.Unhover += SizingHandle_Unhover;
+			if (sizingHandle != null) {
+				sizingHandle.Unhover += SizingHandle_Unhover;
+				sizingHandle.MouseDown += setResizeOn;
+				sizingHandle.MouseUp += setResizeOff;
+			}
+				
+			if (moveHandle != null) {				
+				moveHandle.MouseDown += setMoveOn;				
+				moveHandle.MouseUp += setMoveOff;
+			}
+		}
+		protected void resetHandles () {
+			if (sizingHandle != null) {
+				sizingHandle.Unhover -= SizingHandle_Unhover;
+				sizingHandle.MouseDown -= setResizeOn;
+				sizingHandle.MouseUp -= setResizeOff;
+			}
+				
+			if (moveHandle != null) {				
+				moveHandle.MouseDown -= setMoveOn;				
+				moveHandle.MouseUp -= setMoveOff;
+			}
+			moveHandle = null;
+			sizingHandle = null;
 		}
+		void setResizeOn (object o, EventArgs e) => resize = true;
+		void setResizeOff (object o, EventArgs e) => resize = false;
+		void setMoveOn (object o, EventArgs e) => move = true;
+		void setMoveOff (object o, EventArgs e) => move = false;
+
 
-        private void SizingHandle_Unhover (object sender, EventArgs e) {
+		bool move, resize;
+
+		void SizingHandle_Unhover (object sender, EventArgs e) {
 			currentDirection = Direction.None;
 			NotifyValueChanged ("CurDir", currentDirection);
 		}
-        #endregion
+		#endregion
 
-        #region public properties
-        [DefaultValue("#Crow.Icons.crow.svg")]
+		#region public properties
+		[DefaultValue("#Crow.Icons.crow.svg")]
 		public string Icon {
 			get => _icon;
 			set {
@@ -115,22 +273,6 @@ namespace Crow
 			}
 		}
 		[DefaultValue(false)]
-		public bool IsMinimized {
-			get => _minimized;
-			set{
-				if (value == IsMinimized)
-					return;
-
-				_minimized = value;
-				_contentContainer.IsVisible = !_minimized;
-
-				NotifyValueChangedAuto (_minimized);
-			}
-		}
-		[XmlIgnore]public bool IsMaximized =>
-						Width == Measure.Stretched & Height == Measure.Stretched & !_minimized;		
-		[XmlIgnore]public bool IsNormal => !(IsMaximized|_minimized);
-		[DefaultValue(false)]
 		public bool AlwaysOnTop {
 			get => modal ? true : alwaysOnTop;			
 			set {
@@ -177,11 +319,16 @@ namespace Crow
 				else
 					currentHeight = this.Slot.Height;
 
-				switch (currentDirection) {
-				case Direction.None:
+				if (move) {
 					this.Left = currentLeft + XDelta;				
 					this.Top = currentTop + YDelta;
-					break;
+					return;
+				}
+
+				if (!resize)
+					return;
+
+				switch (currentDirection) {
 				case Direction.N:
 					this.Height = currentHeight - YDelta;
 					if (this.Height == currentHeight - YDelta)
@@ -226,22 +373,22 @@ namespace Crow
 			//}
 		}
 
-		bool maySize => sizingHandle == null ? false : resizable & sizingHandle.IsHover;
-		bool mayMove => moveHandle == null ? false : movable & moveHandle.IsHover;
+		bool maySize => sizingHandle != null && resizable && sizingHandle.IsHover;
+		bool mayMove => moveHandle != null && movable;
 
 		#region GraphicObject Overrides
 		public override void onMouseMove (object sender, MouseMoveEventArgs e)
 		{
 			base.onMouseMove (sender, e);
 
-			if (maySize || mayMove) {
-				if (grabMouse) {
-					moveAndResize (e.XDelta, e.YDelta, currentDirection);
-					return;
-				}
-			}else
+			if (!(mayMove || maySize))
 				return;
 
+			if (move || resize) {
+				moveAndResize (e.XDelta, e.YDelta, currentDirection);
+				return;
+			}
+
 			Point m = Parent is Widget ? (Parent as Widget).ScreenPointToLocal (e.Position) : e.Position;
 
 			if (maySize) {
@@ -269,9 +416,9 @@ namespace Crow
 				return;
 
 			switch (currentDirection) {
-			case Direction.None:
+			/*case Direction.None:
 				IFace.MouseCursor = MouseCursor.move;
-				break;
+				break;*/
 			case Direction.N:
 				IFace.MouseCursor = MouseCursor.top_side;
 				break;
@@ -306,74 +453,38 @@ namespace Crow
 			IFace.MouseCursor = MouseCursor.top_left_arrow;
 			NotifyValueChanged ("CurDir", currentDirection);
 		}
-		bool grabMouse;
-		public override void onMouseDown (object sender, MouseButtonEventArgs e)
-		{
-			NotifyValueChanged ("GrabMouse", true);
-			grabMouse = true;
-			e.Handled = true;
-			base.onMouseDown (sender, e);
-		}
-		public override void onMouseUp (object sender, MouseButtonEventArgs e)
-		{
-			NotifyValueChanged ("GrabMouse", false);
-			NotifyValueChanged ("CurDir", currentDirection);
-			grabMouse = false;
-			e.Handled = true;
-			base.onMouseUp (sender, e);
-		}
 		public override bool MouseIsIn (Point m)
 		{
 			return modal ? true : base.MouseIsIn (m);
 		}
 		#endregion
 
-		protected void onMaximized (object sender, EventArgs e){
+		/*protected void onMaximized (){
 			lock (IFace.LayoutMutex) {
-				if (!IsMinimized)
-					savedBounds = this.LastPaintedSlot;
-				Left = Top = 0;
-				RegisterForLayouting (LayoutingType.Positioning);
-				Width = Height = Measure.Stretched;
-				IsMinimized = false;
-				Resizable = false;
 				NotifyValueChanged ("ShowNormal", true);
 				NotifyValueChanged ("ShowMinimize", true);
 				NotifyValueChanged ("ShowMaximize", false);
 			}
 
-			Maximized.Raise (sender, e);
+			Maximized.Raise (this, null);
 		}
-		protected void onUnmaximized (object sender, EventArgs e){
+		protected void onUnmaximized (){
 			lock (IFace.LayoutMutex) {
-				Left = savedBounds.Left;
-				Top = savedBounds.Top;
-				Width = savedBounds.Width;
-				Height = savedBounds.Height;
-				IsMinimized = false;
-				Resizable = true;
 				NotifyValueChanged ("ShowNormal", false);
 				NotifyValueChanged ("ShowMinimize", true);
 				NotifyValueChanged ("ShowMaximize", true);
 			}
 
-			Unmaximized.Raise (sender, e);
+			Unmaximized.Raise (this, null);
 		}
-		protected void onMinimized (object sender, EventArgs e){
+		protected void onMinimized (){
 			lock (IFace.LayoutMutex) {
 				if (IsNormal)
-					savedBounds = this.LastPaintedSlot;
-				Width = 200;
-				Height = 20;
-				Resizable = false;
-				IsMinimized = true;
-				NotifyValueChanged ("ShowNormal", true);
-				NotifyValueChanged ("ShowMinimize", false);
-				NotifyValueChanged ("ShowMaximize", true);
+					
 			}
 
-			Minimize.Raise (sender, e);
-		}
+			Minimize.Raise (this, null);
+		}*/
 
 		public void onQuitPress (object sender, MouseButtonEventArgs e)
 		{
diff --git a/Crow/src/Widgets/Wrapper.cs b/Crow/src/Widgets/Wrapper.cs
index 19243ba0..71ef6a0d 100644
--- a/Crow/src/Widgets/Wrapper.cs
+++ b/Crow/src/Widgets/Wrapper.cs
@@ -97,78 +97,85 @@ namespace Crow
 		public override int measureRawSize (LayoutingType lt)
 		{
 			int tmp = 0;
-			//Wrapper can't fit in the opposite direction of the wrapper, this func is called only if Fit
-			if (lt == LayoutingType.Width) {
-				if (Orientation == Orientation.Vertical) {
-					Width = Measure.Stretched;
+			DbgLogger.StartEvent(DbgEvtType.GOMeasure, this);
+			try {
+				DbgLogger.SetMsg(DbgEvtType.GOMeasure, $"{lt}");
+
+				//Wrapper can't fit in the opposite direction of the wrapper, this func is called only if Fit
+				if (lt == LayoutingType.Width) {
+					if (Orientation == Orientation.Vertical) {
+						Width = Measure.Stretched;
+						return -1;
+					} else if (RequiredLayoutings.HasFlag (LayoutingType.Height))
+						return -1;
+					else {
+						int dy = 0;
+						int largestChild = 0;
+
+						childrenRWLock.EnterReadLock();
+						try {
+							foreach (Widget c in Children) {
+								if (!c.IsVisible)
+									continue;
+								if (c.Height.IsRelativeToParent &&
+								    c.RequiredLayoutings.HasFlag (LayoutingType.Height)) {							
+									return -1;
+								}
+								if (dy + c.Slot.Height > ClientRectangle.Height) {
+									dy = 0;
+									tmp += largestChild + Spacing;
+									largestChild = c.Slot.Width;
+								} else if (largestChild < c.Slot.Width)
+									largestChild = c.Slot.Width;
+
+								dy += c.Slot.Height + Spacing;
+							}
+						} finally {
+							childrenRWLock.ExitReadLock ();
+						}
+
+						if (dy == 0)
+							tmp -= Spacing;
+						return tmp + largestChild + 2 * Margin;
+					}
+				} else if (Orientation == Orientation.Horizontal) {
+					Height = Measure.Stretched;
 					return -1;
-				} else if (RegisteredLayoutings.HasFlag (LayoutingType.Height))
+				} else if (RequiredLayoutings.HasFlag (LayoutingType.Width))
 					return -1;
 				else {
-					int dy = 0;
-					int largestChild = 0;
+					int dx = 0;
+					int tallestChild = 0;
 
 					childrenRWLock.EnterReadLock();
 					try {
 						foreach (Widget c in Children) {
 							if (!c.IsVisible)
 								continue;
-							if (c.Height.IsRelativeToParent &&
-							    c.RegisteredLayoutings.HasFlag (LayoutingType.Height)) {							
+							if (c.Width.IsRelativeToParent &&
+							    c.RequiredLayoutings.HasFlag (LayoutingType.Width)) {
 								return -1;
 							}
-							if (dy + c.Slot.Height > ClientRectangle.Height) {
-								dy = 0;
-								tmp += largestChild + Spacing;
-								largestChild = c.Slot.Width;
-							} else if (largestChild < c.Slot.Width)
-								largestChild = c.Slot.Width;
-
-							dy += c.Slot.Height + Spacing;
+							if (dx + c.Slot.Width > ClientRectangle.Width) {
+								dx = 0;
+								tmp += tallestChild + Spacing;
+								tallestChild = c.Slot.Height;
+							} else if (tallestChild < c.Slot.Height)
+								tallestChild = c.Slot.Height;
+
+							dx += c.Slot.Width + Spacing;
 						}
 					} finally {
-						childrenRWLock.ExitReadLock ();
+						childrenRWLock.ExitReadLock();
 					}
 
-					if (dy == 0)
+					if (dx == 0)
 						tmp -= Spacing;
-					return tmp + largestChild + 2 * Margin;
-				}
-			} else if (Orientation == Orientation.Horizontal) {
-				Height = Measure.Stretched;
-				return -1;
-			} else if (RegisteredLayoutings.HasFlag (LayoutingType.Width))
-				return -1;
-			else {
-				int dx = 0;
-				int tallestChild = 0;
-
-				childrenRWLock.EnterReadLock();
-				try {
-					foreach (Widget c in Children) {
-						if (!c.IsVisible)
-							continue;
-						if (c.Width.IsRelativeToParent &&
-						    c.RegisteredLayoutings.HasFlag (LayoutingType.Width)) {
-							return -1;
-						}
-						if (dx + c.Slot.Width > ClientRectangle.Width) {
-							dx = 0;
-							tmp += tallestChild + Spacing;
-							tallestChild = c.Slot.Height;
-						} else if (tallestChild < c.Slot.Height)
-							tallestChild = c.Slot.Height;
-
-						dx += c.Slot.Width + Spacing;
-					}
-				} finally {
-					childrenRWLock.ExitReadLock();
-				}
-
-				if (dx == 0)
-					tmp -= Spacing;
-				return tmp + tallestChild + 2 * Margin;
+					return tmp + tallestChild + 2 * Margin;
 			}
+			} finally {
+				DbgLogger.EndEvent(DbgEvtType.GOMeasure);	
+			}		
 		}
 
 		public override bool UpdateLayout (LayoutingType layoutType)
@@ -176,15 +183,10 @@ namespace Crow
 			RegisteredLayoutings &= (~layoutType);
 
 			if (layoutType == LayoutingType.ArrangeChildren) {
-				if ((RegisteredLayoutings & LayoutingType.Sizing) != 0)
+				if ((RequiredLayoutings & LayoutingType.Sizing) != 0)
 					return false;
 
 				ComputeChildrenPositions ();
-
-				//if no layouting remains in queue for item, registre for redraw
-				if (RegisteredLayoutings == LayoutingType.None && IsDirty)
-					IFace.EnqueueForRepaint (this);
-
 				return true;
 			}
 
diff --git a/Samples/DebugLogAnalyzer/src/DebugInterface.cs b/Samples/DebugLogAnalyzer/src/DebugInterface.cs
index a9cd51f1..a15b63aa 100644
--- a/Samples/DebugLogAnalyzer/src/DebugInterface.cs
+++ b/Samples/DebugLogAnalyzer/src/DebugInterface.cs
@@ -70,8 +70,10 @@ namespace Crow
 					Thread.Sleep(1000);	
 				}
 				
-				if (IsDirty)
-					delRegisterForRepaint();				
+				if (IsDirty) {
+					delRegisterForRepaint();
+					//Console.WriteLine ("[DbgIFace]RegisterForRepaint");
+				}
 					
 				Thread.Sleep (UPDATE_INTERVAL);
 			}
@@ -131,8 +133,8 @@ namespace Crow
 		}
 		public override void ForceMousePosition()
 		{
-			Point p = (Point)delGetScreenCoordinate();
+			Point p = Point.Parse(delGetScreenCoordinate().ToString());
 			Glfw.Glfw3.SetCursorPosition (WindowHandle, p.X + MousePosition.X, p.Y + MousePosition.Y);
 		}
 	}
-}
\ No newline at end of file
+}
diff --git a/Samples/DebugLogAnalyzer/src/DebugInterfaceWidget.cs b/Samples/DebugLogAnalyzer/src/DebugInterfaceWidget.cs
index a1bb8156..3ba9faaa 100644
--- a/Samples/DebugLogAnalyzer/src/DebugInterfaceWidget.cs
+++ b/Samples/DebugLogAnalyzer/src/DebugInterfaceWidget.cs
@@ -375,7 +375,7 @@ namespace Crow
 		}
 		protected override void UpdateCache(Context ctx)
 		{			
-			if (initialized && bmp != null) {				
+			if (initialized && bmp != null) {
 				paintCache (ctx, Slot + Parent.ClientRectangle.Position);
 				delResetDirtyState ();				
 			}
diff --git a/Samples/DebugLogAnalyzer/ui/DbgEventView.template b/Samples/DebugLogAnalyzer/ui/DbgEventView.template
index 6679f150..2a61874e 100644
--- a/Samples/DebugLogAnalyzer/ui/DbgEventView.template
+++ b/Samples/DebugLogAnalyzer/ui/DbgEventView.template
@@ -5,6 +5,7 @@
 		<Label Text="Instance:" Foreground="White" Width="50%" />	
 		<Label Text="{InstanceIndex}" Foreground="White" Background="Onyx" Width="Stretched" TextAlignment="Center"/>				
 	</HorizontalStack>
+	<Label Text="{Message}" Foreground="White" Background="Onyx" Width="Stretched" Visible="{HasMessage}" Margin="2" Tooltip="{}"/>			
 	<HorizontalStack Height="Fit" Width="Stretched" Spacing="2" Background="DimGrey" Margin="2">
 		<Label Text="Duration(ms):" Foreground="White" Width="50%" />	
 		<Label Text="{DurationMS}" Foreground="White" Background="Onyx" Width="Stretched" TextAlignment="Right"/>				
diff --git a/Samples/DebugLogAnalyzer/ui/DbgEvtTooltip.crow b/Samples/DebugLogAnalyzer/ui/DbgEvtTooltip.crow
index 2d5815e9..a3369249 100644
--- a/Samples/DebugLogAnalyzer/ui/DbgEvtTooltip.crow
+++ b/Samples/DebugLogAnalyzer/ui/DbgEvtTooltip.crow
@@ -6,6 +6,7 @@
 			<Label Text="Instance:" Foreground="White" Width="50%" />	
 			<Label Text="{InstanceIndex}" Foreground="White" Background="Onyx" Width="Stretched" TextAlignment="Center"/>				
 		</HorizontalStack>
+		<Label Text="{Message}" Foreground="White" Background="Onyx" Width="Stretched" Visible="{HasMessage}" Margin="2" Tooltip="{}"/>			
 		<HorizontalStack Height="Fit" Width="Stretched" Spacing="2" Background="DimGrey" Margin="2">
 			<Label Text="Duration:" Foreground="White" Width="50%" />	
 			<Label Text="{DurationMS}" Foreground="White" Background="Onyx" Width="Stretched" TextAlignment="Right"/>				
diff --git a/Samples/ShowCase/ui/showcase.crow b/Samples/ShowCase/ui/showcase.crow
index 9e6b0cd2..431745f9 100644
--- a/Samples/ShowCase/ui/showcase.crow
+++ b/Samples/ShowCase/ui/showcase.crow
@@ -25,7 +25,7 @@
 								<ListItem ContextCommands="{GetCommands}"
 										Selected="{/exp.Background=${ControlHighlight}}"
 										Unselected="{/exp.Background=Transparent}">
-									<Expandable Name="exp" Caption="{Name}" MouseDoubleClick="/onClickForExpand" BubbleMouseEvent="true">
+									<Expandable Name="exp" Caption="{Name}" MouseDoubleClick="/onClickForExpand" >
 										<Template>
 											<VerticalStack>
 												<Border CornerRadius="2" Margin="0" Height="Fit" MouseDoubleClick="./onClickForExpand"
diff --git a/Samples/common/src/Editor.cs b/Samples/common/src/Editor.cs
index 7b0f1f04..686afaed 100644
--- a/Samples/common/src/Editor.cs
+++ b/Samples/common/src/Editor.cs
@@ -110,7 +110,7 @@ namespace Crow
 										Suggestions = (new string[] {"Stretched", "Fit"}).
 											Where (s => s.StartsWith (currentToken.AsString (_text), StringComparison.OrdinalIgnoreCase)).ToList ();
 									else if (pi.PropertyType == typeof (Fill)) 
-										Suggestions = FastEnumUtility.FastEnum.GetValues<Colors> ()
+										Suggestions = EnumsNET.Enums.GetValues<Colors> ()
 											.Where (s => s.ToString().StartsWith (currentToken.AsString (_text), StringComparison.OrdinalIgnoreCase)).ToList ();
 								}
 							} else if (currentToken.Type == TokenType.AttributeValueOpen) {
@@ -124,7 +124,7 @@ namespace Crow
 									else if (pi.PropertyType == typeof(bool))
 										Suggestions = new List<string> (new string[] {"true", "false"});
 									else if (pi.PropertyType == typeof (Fill)) 
-										Suggestions = FastEnumUtility.FastEnum.GetValues<Colors> ().ToList ();
+										Suggestions = EnumsNET.Enums.GetValues<Colors> ().ToList ();
 									else if (pi.PropertyType == typeof (Measure))
 										Suggestions = new List<string> (new string[] {"Stretched", "Fit"});
 								}
diff --git a/Samples/common/src/SampleBase.cs b/Samples/common/src/SampleBase.cs
index 75f998cd..8d7718ed 100644
--- a/Samples/common/src/SampleBase.cs
+++ b/Samples/common/src/SampleBase.cs
@@ -317,7 +317,7 @@ namespace Samples
 		}
 
 
-		IList<Colors> testList = (IList<Colors>)FastEnumUtility.FastEnum.GetValues<Colors>().ToList();//.ColorDic.Values//.OrderBy(c=>c.Hue)
+		IList<Colors> testList = (IList<Colors>)EnumsNET.Enums.GetValues<Colors>().ToList();//.ColorDic.Values//.OrderBy(c=>c.Hue)
 																									  //.ThenBy(c=>c.Value).ThenBy(c=>c.Saturation)
 																									  //.ToList ();
 		public IList<Colors> TestList
@@ -330,7 +330,7 @@ namespace Samples
 			get { return testList; }
 		}
 		void OnClear(object sender, MouseButtonEventArgs e) => TestList = null;
-		void OnLoadList(object sender, MouseButtonEventArgs e) => TestList = (IList<Colors>)FastEnumUtility.FastEnum.GetValues<Colors>().ToList();
+		void OnLoadList(object sender, MouseButtonEventArgs e) => TestList = (IList<Colors>)EnumsNET.Enums.GetValues<Colors>().ToList();
 
 
 		string curSources = "";
diff --git a/Samples/common/ui/Interfaces/Divers/0.crow b/Samples/common/ui/Interfaces/Divers/0.crow
index 263edfc7..d9ba0161 100644
--- a/Samples/common/ui/Interfaces/Divers/0.crow
+++ b/Samples/common/ui/Interfaces/Divers/0.crow
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<Window Caption="Showcase" Height="90%" Width="90%" Background="DarkGrey">
+<Window Caption="Showcase" Height="90%" Width="91%" Background="DarkGrey">
 	<HorizontalStack>
 		<VerticalStack Width="30%" Margin="5">
 			<ListBox Data="{PerfMeasures}" Height="Fit">
diff --git a/Samples/common/ui/Interfaces/Divers/color3.crow b/Samples/common/ui/Interfaces/Divers/color3.crow
new file mode 100644
index 00000000..1788004c
--- /dev/null
+++ b/Samples/common/ui/Interfaces/Divers/color3.crow
@@ -0,0 +1,7 @@
+<?xml version="1.0"?>
+<VerticalStack>
+	<Widget Name="go" Width="100" Height="60" Background="DarkBlue"/>
+	<Widget Width="100" Height="60" Background="{../colorPicker.CurrentColor}"/>
+	<Label Text="{../colorPicker.CurrentColor}"/>
+	<ColorPicker CurrentColor="{²../go.Background}" Name="colorPicker" Background="DimGrey" MinimumSize="0,0" Width="300" Template="/mnt/devel/CrowIDE/Crow/Samples/common/ui/templates/ColorPicker.template" />
+</VerticalStack>
\ No newline at end of file
diff --git a/Samples/common/ui/Interfaces/Divers/fitListWithStretchedItems.crow b/Samples/common/ui/Interfaces/Divers/fitListWithStretchedItems.crow
index 6fd59f14..f159a6b2 100644
--- a/Samples/common/ui/Interfaces/Divers/fitListWithStretchedItems.crow
+++ b/Samples/common/ui/Interfaces/Divers/fitListWithStretchedItems.crow
@@ -1,5 +1,4 @@
 <?xml version="1.0"?>
-
 <ListBox Data="{TestList}" Width="Fit" Focusable="true" >
 	<Template>
 		<Scroller Name="ItemsScroller" Height="Stretched" Background="Onyx" Margin="10">
diff --git a/Samples/common/ui/Interfaces/Divers/testDisable.crow b/Samples/common/ui/Interfaces/Divers/testDisable.crow
index 68d1cebb..f71a6110 100644
--- a/Samples/common/ui/Interfaces/Divers/testDisable.crow
+++ b/Samples/common/ui/Interfaces/Divers/testDisable.crow
@@ -6,8 +6,8 @@
 	<Label Text="{fps}" IsEnabled="true" Font="30"/>
 		<Label Text="{fps}" IsEnabled="false" Font="30" Background="SeaGreen"/>
 	<Label Text="{fps}" IsEnabled="true" Font="30" Background="SeaGreen"/>
-	<Button Caption="Button" IsEnabled="true" Background="Grey"/>
-	<Button Caption="Button" IsEnabled="false" Background="Grey"/>
+	<Button Caption="Button" IsEnabled="true" Background="DimGrey"/>
+	<Button Caption="Button" IsEnabled="false" Background="DimGrey"/>
 	<Button Caption="Button" IsEnabled="true" />
 	<Button Caption="Button" IsEnabled="false" />
 	<Spinner Fit="true"/>
diff --git a/Samples/common/ui/Interfaces/Divers/windows.crow b/Samples/common/ui/Interfaces/Divers/windows.crow
new file mode 100644
index 00000000..5e4454a6
--- /dev/null
+++ b/Samples/common/ui/Interfaces/Divers/windows.crow
@@ -0,0 +1 @@
+<Window CurrentState="Normal" Width="200" Height="200"/>
\ No newline at end of file
diff --git a/Samples/common/ui/Interfaces/Experimental/colorPicktest.crow b/Samples/common/ui/Interfaces/Experimental/colorPicktest.crow
new file mode 100644
index 00000000..1db2be6b
--- /dev/null
+++ b/Samples/common/ui/Interfaces/Experimental/colorPicktest.crow
@@ -0,0 +1,23 @@
+<ColorPicker Width="Fit" Height="Stretched" Background="Onyx">
+	<Template>
+		<ListBox Data="{./AvailableColors}" Margin="15">
+			<Template>
+				<Scroller>
+					<VerticalStack Name="ItemsContainer" Height="Fit" VerticalAlignment="Top" Background="DarkGrey" Margin="5" />
+				</Scroller>
+			</Template>
+			<ItemTemplate>
+				<ListItem Margin="1" Width="Stretched" 
+					Selected="{Background=RoyalBlue}"
+					Unselected="{Background=Transparent}">
+					<HorizontalStack Height="Fit" >
+						<Widget Width="20" Height="14" Background="{}" CornerRadius="3"/>
+						<Label Text="{}" Width="Stretched" />
+					</HorizontalStack>
+				</ListItem>
+			</ItemTemplate>
+		</ListBox>
+	</Template>
+</ColorPicker>
+
+				
\ No newline at end of file
diff --git a/Samples/common/ui/Interfaces/Experimental/colorPicktest2.crow b/Samples/common/ui/Interfaces/Experimental/colorPicktest2.crow
new file mode 100644
index 00000000..63991ff1
--- /dev/null
+++ b/Samples/common/ui/Interfaces/Experimental/colorPicktest2.crow
@@ -0,0 +1,19 @@
+<ColorPicker Height="Stretched" Background="Onyx" Width="Fit">
+	<Template>
+		<ListBox Width="Stretched" Data="{./AvailableColors}" Margin="10">
+			<Template>
+				<Scroller Name="scroller1" Margin="5" ClipToClientRect="true" Background="Onyx">
+					<VerticalStack Name="ItemsContainer" Height="Fit" VerticalAlignment="Top"/>
+				</Scroller>
+			</Template>
+			<ItemTemplate>
+				<ListItem Margin="1" Width="Stretched"
+						Selected="{Background=White}"
+						Unselected="{Background=Transparent}" >
+						<Label CornerRadius="3" Margin="2" Background="{}" Text="{}" Width="Stretched" />
+				</ListItem>
+			</ItemTemplate>
+		</ListBox>
+	</Template>
+</ColorPicker>
+				
\ No newline at end of file
diff --git a/Samples/common/ui/Interfaces/Experimental/multiColorPick2.crow b/Samples/common/ui/Interfaces/Experimental/multiColorPick2.crow
index 5d6e2364..21490b71 100644
--- a/Samples/common/ui/Interfaces/Experimental/multiColorPick2.crow
+++ b/Samples/common/ui/Interfaces/Experimental/multiColorPick2.crow
@@ -11,7 +11,7 @@
 					</HorizontalStack>
 				</Template>/>
 				<TabView  MinimumSize="{../MinimumPopupSize}" Width="200" Height="200"  >
-					<ColorPicker Name="HSV" CurrentColor="{²../../../CurrentColor}" Background="Onyx" BubbleMouseEvent="false"/>
+					<ColorPicker Name="HSV" CurrentColor="{²../../../CurrentColor}" Background="Onyx" />
 					<ColorPicker IsVisible="false" Name="Names" CurrentColor="{²../../../CurrentColor}" Height="Stretched" Background="Onyx">
 						<Template>
 							<ListBox Width="Stretched" Data="{./AvailableColors}" SelectedItemChanged="./onSelectedItemChanged">
diff --git a/Samples/common/ui/Interfaces/Experimental/tabView1.crow b/Samples/common/ui/Interfaces/Experimental/tabView1.crow
index 5df13d0a..773ec4fe 100644
--- a/Samples/common/ui/Interfaces/Experimental/tabView1.crow
+++ b/Samples/common/ui/Interfaces/Experimental/tabView1.crow
@@ -1,4 +1,4 @@
 <TabView>
-	<GroupBox Caption="test" Background="Black"/>
-	<GroupBox Caption="test" Background="Black"/>
+	<GroupBox Caption="test" Background="Red"/>
+	<GroupBox Caption="test" Background="Blue"/>
 </TabView>
\ No newline at end of file
diff --git a/Samples/common/ui/Interfaces/Stack/StretchedInFit1.crow b/Samples/common/ui/Interfaces/Stack/StretchedInFit1.crow
new file mode 100644
index 00000000..fc31fe00
--- /dev/null
+++ b/Samples/common/ui/Interfaces/Stack/StretchedInFit1.crow
@@ -0,0 +1,26 @@
+<?xml version="1.0"?>
+<VerticalStack Background="DimGrey" Margin="1" Width="Fit" Height="Fit">
+<VerticalStack Background="DimGrey" Margin="1" Width="Stretched" Height="Fit">
+<VerticalStack Background="DimGrey" Margin="1" Width="Stretched" Height="Fit">
+<VerticalStack Background="DimGrey" Margin="1" Width="Stretched" Height="Fit">
+	<Label Text="this " Margin="0" Width="Stretched" Height="Fit" Background="SeaGreen"/>
+	<Label Text="this is a test" Margin="0" Width="Stretched" Height="Fit" Background="SeaGreen"/>
+	<Label Text="this is a test" Margin="0" Width="Stretched" Height="Fit" Background="SeaGreen"/>
+	<Label Text="this is a test" Margin="0" Width="Stretched" Height="Fit" Background="SeaGreen"/>
+	<Label Text="this is a test" Margin="0" Width="Stretched" Height="Fit" Background="SeaGreen"/>
+	<Label Text="this is a test" Margin="0" Width="Stretched" Height="Fit" Background="SeaGreen"/>
+	<Label Text="this is a test" Margin="0" Width="Stretched" Height="Fit" Background="SeaGreen"/>
+	<Label Text="this is a test" Margin="0" Width="Stretched" Height="Fit" Background="SeaGreen"/>
+	<Label Text="this is a test" Margin="0" Width="Stretched" Height="Fit" Background="SeaGreen"/>
+	<Label Text="this is a test" Margin="0" Width="Stretched" Height="Fit" Background="SeaGreen"/>
+	<Label Text="this is a test" Margin="0" Width="Stretched" Height="Fit" Background="SeaGreen"/>
+	<Label Text="thismlkjqsdfmsmlfkj " Margin="0" Width="Stretched" Height="Fit" Background="SeaGreen"/>
+	<Label Text="this is a test" Margin="0" Width="Stretched" Height="Fit" Background="SeaGreen"/>
+	<Label Text="this is a test" Margin="0" Width="Stretched" Height="Fit" Background="SeaGreen"/>
+	<Label Text="this is a test" Margin="0" Width="Stretched" Height="Fit" Background="SeaGreen"/>
+	<Label Text="this is a test" Margin="0" Width="Stretched" Height="Fit" Background="SeaGreen"/>
+	<Label Text="this is a test" Margin="0" Width="Stretched" Height="Fit" Background="SeaGreen"/>
+</VerticalStack>
+</VerticalStack>
+</VerticalStack>
+</VerticalStack>
\ No newline at end of file
diff --git a/Samples/common/ui/Interfaces/Stack/StretchedInFit3.1.crow b/Samples/common/ui/Interfaces/Stack/StretchedInFit3.1.crow
new file mode 100644
index 00000000..586c36f1
--- /dev/null
+++ b/Samples/common/ui/Interfaces/Stack/StretchedInFit3.1.crow
@@ -0,0 +1,15 @@
+<?xml version="1.0"?> 
+<VerticalStack Height="Fit" Width="Fit" Margin="10" Background="Onyx">
+	<HorizontalStack Width="Stretched">
+		<Label Text="th" Width="Stretched" Background="Grey"/>
+		<Label Text="this is a fit label" Width="Fit" Background="Teal"/>
+	</HorizontalStack>
+	<HorizontalStack Width="Stretched">
+		<Label Text="this is a stretchedlkqsdflkj" Width="Stretched" Background="Grey"/>
+		<Label Text="this" Width="Fit" Background="Teal"/>
+	</HorizontalStack>
+	<HorizontalStack Width="Stretched">
+		<Label Text="this is a stretched label" Width="Stretched" Background="Grey"/>
+		<Label Text="th" Width="Fit" Background="Teal"/>
+	</HorizontalStack>
+</VerticalStack> 
diff --git a/Samples/common/ui/Interfaces/Stack/StretchedInFit3.2.crow b/Samples/common/ui/Interfaces/Stack/StretchedInFit3.2.crow
new file mode 100644
index 00000000..e08b09be
--- /dev/null
+++ b/Samples/common/ui/Interfaces/Stack/StretchedInFit3.2.crow
@@ -0,0 +1,7 @@
+<?xml version="1.0"?> 
+<Container Height="Fit" Width="Fit" Margin="1" Background="CornflowerBlue">
+	<VerticalStack Height="Stretched" >
+		<Label Text="this is a stretched label" Width="Stretched" Height="Stretched"/>
+		<Label Text="this is a fit label" Width="Stretched" Height="Fit"/>
+	</VerticalStack>
+</Container>
diff --git a/Samples/common/ui/Interfaces/Stack/StretchedInFit3.3.crow b/Samples/common/ui/Interfaces/Stack/StretchedInFit3.3.crow
new file mode 100644
index 00000000..3643b13e
--- /dev/null
+++ b/Samples/common/ui/Interfaces/Stack/StretchedInFit3.3.crow
@@ -0,0 +1,17 @@
+<?xml version="1.0"?> 
+<Container Width="Stretched">
+<VerticalStack Height="Fit" Width="Stretched" Margin="5" Background="Onyx">
+	<HorizontalStack Width="Fit" >
+		<Label Text="thed label" Width="Stretched" Background="Grey"/>
+		<Label Text="this  label" Width="Fit" Background="Teal"/>
+	</HorizontalStack>
+	<HorizontalStack  Width="Stretched">
+		<Label Text="this is a stretched label" Width="Stretched" Background="Grey"/>
+		<Label Text="this is a fit label" Width="Fit" Background="Teal"/>
+	</HorizontalStack>
+	<HorizontalStack Width="Stretched" >
+		<Label Text="this is a stret" Width="Stretched" Background="Grey"/>
+		<Label Text="thi" Width="Fit" Background="Teal"/>
+	</HorizontalStack>
+</VerticalStack>
+</Container>
diff --git a/Samples/common/ui/Interfaces/Stack/StretchedInFit3.4.crow b/Samples/common/ui/Interfaces/Stack/StretchedInFit3.4.crow
new file mode 100644
index 00000000..31791555
--- /dev/null
+++ b/Samples/common/ui/Interfaces/Stack/StretchedInFit3.4.crow
@@ -0,0 +1,4 @@
+<HorizontalStack Height="Fit" Width="Fit" Background="DarkSlateBlue" Margin="10">
+	<Label Name="lab" Text="this is a long stretched label" Width="Stretched" Background="Grey"/>
+	<Label Text="label" Width="Fit" Background="Teal"/>
+</HorizontalStack>
diff --git a/Samples/common/ui/Interfaces/Stack/StretchedInFit3.5.crow b/Samples/common/ui/Interfaces/Stack/StretchedInFit3.5.crow
new file mode 100644
index 00000000..b7fe4fa5
--- /dev/null
+++ b/Samples/common/ui/Interfaces/Stack/StretchedInFit3.5.crow
@@ -0,0 +1,17 @@
+<?xml version="1.0"?> 
+<Container Width="Stretched">
+<VerticalStack Height="Fit" Width="Fit" Margin="5" Background="Onyx">
+	<HorizontalStack Width="Stretched" >
+		<Label Text="stretched-end" Width="Stretched" Background="Grey"/>
+		<Label Text="fit" Width="Fit" Background="Teal"/>
+	</HorizontalStack>
+	<HorizontalStack  Width="Stretched">
+		<Label Text="stretched labelsdqfqsfdqsdfqsdfqsdfdsqfqsdfqsdfqsdfdqsfdqsfdqsfdqsfdqsfqsdfdqsfdqsfdqsfdqsfdqsfqsdf" Width="Stretched" Background="Grey"/>
+		<Label Text="fit" Width="Fit" Background="Teal"/>
+	</HorizontalStack>
+	<HorizontalStack Width="Stretched" >
+		<Label Text="stretched-end" Width="Stretched" Background="Grey"/>
+		<Label Text="fit" Width="Fit" Background="Teal"/>
+	</HorizontalStack>
+</VerticalStack>
+</Container>
diff --git a/Samples/common/ui/Interfaces/Stack/StretchedInFit3.crow b/Samples/common/ui/Interfaces/Stack/StretchedInFit3.crow
index 84c057ff..b9516942 100644
--- a/Samples/common/ui/Interfaces/Stack/StretchedInFit3.crow
+++ b/Samples/common/ui/Interfaces/Stack/StretchedInFit3.crow
@@ -4,10 +4,10 @@
 		<VerticalStack Width="Stretched" Margin="10" Background="FireBrick">
 			<VerticalStack Width="Stretched" Margin="10" Background="Teal">
 				<VerticalStack Width="Stretched" Margin="10" Background="CornflowerBlue">
-					<Label Text="{./Caption}" Width="Stretched"/>
-					<Label Text="{./Caption}" Width="Stretched"/>
-					<Label Text="{./Caption}" Width="Stretched"/>
-					<Label Text="{./Caption}" Width="Stretched"/>
+					<Label Text="label" Width="Stretched"/>
+					<Label Text="a bit longer" Width="Stretched"/>
+					<Label Text="cow" Width="Stretched"/>
+					<Label Text="horse" Width="Stretched"/>
 				</VerticalStack>
 			</VerticalStack>
 		</VerticalStack>
diff --git a/Samples/common/ui/Interfaces/Stack/StretchedInFit5.crow b/Samples/common/ui/Interfaces/Stack/StretchedInFit5.crow
index 68078f98..0036d272 100644
--- a/Samples/common/ui/Interfaces/Stack/StretchedInFit5.crow
+++ b/Samples/common/ui/Interfaces/Stack/StretchedInFit5.crow
@@ -1,7 +1,9 @@
 <?xml version="1.0"?>
-<VerticalStack Background="DimGrey" Margin="10" Width="Fit" Height="Fit" >
-	<CheckBox Name="cb"/>
-	<CheckBox Name="cb2"/>
+<VerticalStack Background="DimGrey" Margin="10" Width="Fit" Height="Fit"
+	MouseEnter="{Background=Blue}"
+	MouseLeave="{Background=DimGrey}" >
+	<CheckBox Name="cb" MouseEnter="{Background=DarkRed}" MouseLeave="{Background=Transparent}"/>
+	<CheckBox Name="cb2"  MouseEnter="{Background=DarkRed}" MouseLeave="{Background=Transparent}"/>
 	<Container Visible="{²../cb.IsChecked}" Width="Stretched" Margin="10" Background="RoyalBlue"> 
 		<VerticalStack  Margin="5" Background="Yellow">
 		<VerticalStack Margin="5" Background="Teal">
diff --git a/Samples/common/ui/Interfaces/TemplatedControl/testItemTemplateTag.crow b/Samples/common/ui/Interfaces/TemplatedControl/testItemTemplateTag.crow
index fd873489..ca8a955e 100644
--- a/Samples/common/ui/Interfaces/TemplatedControl/testItemTemplateTag.crow
+++ b/Samples/common/ui/Interfaces/TemplatedControl/testItemTemplateTag.crow
@@ -1,7 +1,7 @@
 <?xml version="1.0"?>
 <Border BorderWidth="2" Fit="true" Background="DarkGrey">
 	<VerticalStack Fit="true" Margin="5">
-		<ListBox Data="{TestList}" Background="Jet" HorizontalAlignment="Center" Width="200" Height="200" Margin="5">
+		<ListBox Data="{TestList}" Background="Jet" HorizontalAlignment="Center" Width="Fit" Height="200" Margin="5">
 			<Template>
 				<Border BorderWidth="1" Background="{./Background}">
 					<HorizontalStack Margin="1">
@@ -18,7 +18,7 @@
 			<ItemTemplate DataType="Crow.Colors">
 				<HorizontalStack
 							HorizontalAlignment="Left"
-							Height="Fit" Width="200" Margin="1" Focusable="true"
+							Height="Fit" Width="Stretched" Margin="1" Focusable="true"
 							MouseEnter="{Background=RoyalBlue}"
 							MouseLeave="{Background=Transparent}">
 					
diff --git a/Samples/common/ui/Interfaces/colorPicker.tmp b/Samples/common/ui/Interfaces/colorPicker.tmp
index 085e17ad..e87399d6 100644
--- a/Samples/common/ui/Interfaces/colorPicker.tmp
+++ b/Samples/common/ui/Interfaces/colorPicker.tmp
@@ -8,7 +8,7 @@
 		</HorizontalStack>
 	</Template>/>
 	<TabView  MinimumSize="{../MinimumPopupSize}" Width="200" Height="200"  >
-		<ColorPicker Name="HSV" CurrentColor="{²../../../CurrentColor}" Background="Onyx" BubbleMouseEvent="false"/>
+		<ColorPicker Name="HSV" CurrentColor="{²../../../CurrentColor}" Background="Onyx" />
 		<ColorPicker IsVisible="false" Name="Names" CurrentColor="{²../../../CurrentColor}" Height="Stretched" Background="Onyx">
 			<Template>
 				<ListBox Width="Stretched" Data="{./AvailableColors}" SelectedItemChanged="./onSelectedItemChanged">
diff --git a/Samples/common/ui/templates/ColorPicker.template b/Samples/common/ui/templates/ColorPicker.template
index 085e17ad..e87399d6 100644
--- a/Samples/common/ui/templates/ColorPicker.template
+++ b/Samples/common/ui/templates/ColorPicker.template
@@ -8,7 +8,7 @@
 		</HorizontalStack>
 	</Template>/>
 	<TabView  MinimumSize="{../MinimumPopupSize}" Width="200" Height="200"  >
-		<ColorPicker Name="HSV" CurrentColor="{²../../../CurrentColor}" Background="Onyx" BubbleMouseEvent="false"/>
+		<ColorPicker Name="HSV" CurrentColor="{²../../../CurrentColor}" Background="Onyx" />
 		<ColorPicker IsVisible="false" Name="Names" CurrentColor="{²../../../CurrentColor}" Height="Stretched" Background="Onyx">
 			<Template>
 				<ListBox Width="Stretched" Data="{./AvailableColors}" SelectedItemChanged="./onSelectedItemChanged">
diff --git a/Samples/common/ui/templates/testitems.crow b/Samples/common/ui/templates/testitems.crow
new file mode 100644
index 00000000..f09b9c62
--- /dev/null
+++ b/Samples/common/ui/templates/testitems.crow
@@ -0,0 +1,23 @@
+<ColorPicker Name="Names" Height="Stretched" Background="Onyx">
+	<Template>
+		<ListBox Height="Fit" Width="Stretched" Data="{./AvailableColors}" >		
+			<ItemTemplate>
+				<ListItem Margin="0" Height="16" Width="Fit"
+							Selected="{Background=Black}"
+							Unselected="{Background=Transparent}">
+					<Label Height="Fit" Width="Fit" Text="{}" Background="{}" Margin="5"/>
+				</ListItem>
+			</ItemTemplate>
+			<Template>
+				<VerticalStack Width="Stretched" >
+					<Scroller Name="scroller"   >
+						<HorizontalStack Name="ItemsContainer"  Width="Fit" HorizontalAlignment="Left"/>
+					</Scroller>
+					<ScrollBar Style="HScrollBar" Name="scrollbar1" Value="{²../scroller.ScrollX}"
+						LargeIncrement="{../scroller.PageWidth}" SmallIncrement="30" CursorRatio="{../scroller.ChildWidthRatio}"
+						Maximum="{../scroller.MaxScrollX}" Height="12" />
+				</VerticalStack>
+			</Template>
+		</ListBox>
+	</Template>
+</ColorPicker>
\ No newline at end of file
diff --git a/Samples/dockableWindows/dockableWindows.cs b/Samples/dockableWindows/dockableWindows.cs
index a08e7afb..1dccc7b8 100644
--- a/Samples/dockableWindows/dockableWindows.cs
+++ b/Samples/dockableWindows/dockableWindows.cs
@@ -9,6 +9,7 @@ namespace tests
 		static void Main ()
 		{
 			using (BasicTests app = new BasicTests ()) {
+				app.SolidBackground = false;
 				app.Run ();
 			}
 		}
diff --git a/Samples/dockableWindows/ui/dock.style b/Samples/dockableWindows/ui/dock.style
index ef3f43e1..49c7f03c 100644
--- a/Samples/dockableWindows/ui/dock.style
+++ b/Samples/dockableWindows/ui/dock.style
@@ -5,6 +5,9 @@ DockStack {
 }
 DockWindow {
 	Template="#ui.dockWin.template";
+	AllowedStates="Normal|Maximized|Minimized";
+	Width="260";
+	Height="200";
 }
 TabView {
 	Template="#ui.TabView.template";
diff --git a/Samples/dockableWindows/ui/dockWin.template b/Samples/dockableWindows/ui/dockWin.template
index c53b260c..971be0c4 100644
--- a/Samples/dockableWindows/ui/dockWin.template
+++ b/Samples/dockableWindows/ui/dockWin.template
@@ -1,24 +1,43 @@
 <?xml version="1.0"?>
 <Border Name="SizeHandle" BorderWidth="1" Foreground="Black" CornerRadius="{./CornerRadius}" StickyMouse="8" StickyMouseEnabled="{./IsFloating}"
 				Background="{./Background}">
-	<VerticalStack Spacing="0">
+	<VerticalStack Spacing="0" Name="MoveHandle">
 		<HorizontalStack Height="Fit" IsVisible="{./IsDocked}" Background="Black">
 			<Label Text="{./Caption}"/>
+			<Label Text="{./CurrentState}" Margin="1" Foreground="Black" Background="Grey"/>
 			<Label Text="{./DockingPosition}"/>
+			<ListBox Data="{./DockCommands}" Fit="true">
+				<Template>
+					<HorizontalStack Name="ItemsContainer" />
+				</Template>
+				<ItemTemplate Path="#Crow.WindowButton.template"/>
+			</ListBox>
+			<ListBox Data="{./Commands}" Fit="true">
+				<Template>
+					<HorizontalStack Name="ItemsContainer" />
+				</Template>
+				<ItemTemplate Path="#Crow.WindowButton.template"/>
+			</ListBox>			
 		</HorizontalStack>
 		<HorizontalStack Background="vgradient|0:0.5,0.6,0.5,0.5|1:0.2,0.3,0.3,0.7"
 				Name="hs" Margin="0" Spacing="0" Height="Fit" Visible="{./IsFloating}">
 			<Widget Width="5"/>			
 			<Image Margin="1" Width="10" Height="10" Path="{./Icon}"/>			
 			<Label Text="{./Caption}"/>
+			<Label Text="{./CurrentState}" Margin="1" Foreground="Black" Background="Grey"/>
 			<Label Width="Stretched" Foreground="White" Margin="1" TextAlignment="Left" Text="{./DockingPosition}" />
-			<Border CornerRadius="6" BorderWidth="1" Foreground="Transparent"  Height="10" Width="10"
-				MouseEnter="{Foreground=White}" MouseLeave="{Foreground=Transparent}">
-				<Image Focusable="true" Name="Image" Margin="0" Path="#Crow.Icons.exit2.svg"
-					 MouseClick="./onQuitPress"/>
-			</Border>
-			<Widget Width="5"/>
-		</HorizontalStack>
+			<ListBox Data="{./DockCommands}" Fit="true">
+				<Template>
+					<HorizontalStack Name="ItemsContainer" />
+				</Template>
+				<ItemTemplate Path="#Crow.WindowButton.template"/>
+			</ListBox>
+			<ListBox Data="{./Commands}" Fit="true">
+				<Template>
+					<HorizontalStack Name="ItemsContainer" />
+				</Template>
+				<ItemTemplate Path="#Crow.WindowButton.template"/>
+			</ListBox>		</HorizontalStack>
 		<Container Name="Content" MinimumSize="50,50"/>		
 	</VerticalStack>
 </Border>
-- 
2.47.3