New Post: Prism/MEF + AvalonDock 2

Hi,
I'm trying to build Visual Studio like interface for my LOB application which is based on Prism 4 and MEF. so i used the following region adapters as per sample called Central :
1-AnchorableRegionAdapter

[Export(typeof(AnchorableRegionAdapter))]
    [PartCreationPolicy(CreationPolicy.NonShared)]
    public class AnchorableRegionAdapter : RegionAdapterBase<LayoutAnchorable>
    {
        [ImportingConstructor]
        public AnchorableRegionAdapter(IRegionBehaviorFactory regionBehaviorFactory)
            : base(regionBehaviorFactory)
        {
        }

        protected override void Adapt(IRegion region, LayoutAnchorable regionTarget)
        {
            if (regionTarget == null)
                throw new ArgumentNullException("regionTarget");

            if (regionTarget.Content != null)
            {
                throw new InvalidOperationException();
            }

            region.ActiveViews.CollectionChanged += delegate
            {
                regionTarget.Content = region.ActiveViews.FirstOrDefault();
            };

            region.Views.CollectionChanged +=
                (sender, e) =>
                {
                    if (e.Action == NotifyCollectionChangedAction.Add && region.ActiveViews.Count() == 0)
                    {
                        region.Activate(e.NewItems[0]);
                    }
                };
        }

        protected override IRegion CreateRegion()
        {
            return new SingleActiveRegion();
        }
    }

2-DocumentRegionAdapter

[Export(typeof(DocumentRegionAdapter))]
    [PartCreationPolicy(CreationPolicy.NonShared)]
    public class DocumentRegionAdapter : RegionAdapterBase<LayoutDocument>
    {
        [ImportingConstructor]
        public DocumentRegionAdapter(IRegionBehaviorFactory regionBehaviorFactory)
            : base(regionBehaviorFactory)
        {
        }

        protected override void Adapt(IRegion region, LayoutDocument regionTarget)
        {
            if (regionTarget == null)
                throw new ArgumentNullException("regionTarget");

            if (regionTarget.Content != null)
            {
                throw new InvalidOperationException();
            }

            region.ActiveViews.CollectionChanged += delegate
            {
                regionTarget.Content = region.ActiveViews.FirstOrDefault();
            };

            region.Views.CollectionChanged +=
                (sender, e) =>
                {
                    if (e.Action == NotifyCollectionChangedAction.Add && region.ActiveViews.Count() == 0)
                    {
                        region.Activate(e.NewItems[0]);
                    }
                };
        }

        protected override IRegion CreateRegion()
        {
            return new SingleActiveRegion();
        }

3-AvalonDockRegion

[Export(typeof(AvalonDockRegion))]
    public class AvalonDockRegion : DependencyObject
    {
        #region Name

        /// <summary>
        /// Name Attached Dependency Property
        /// </summary>
        public static readonly DependencyProperty NameProperty =
            DependencyProperty.RegisterAttached("Name", typeof(string), typeof(AvalonDockRegion),
                new FrameworkPropertyMetadata((string)null,
                    new PropertyChangedCallback(OnNameChanged)));

        /// <summary>
        /// Gets the Name property.  This dependency property
        /// indicates the region name of the layout item.
        /// </summary>
        public static string GetName(DependencyObject d)
        {
            return (string)d.GetValue(NameProperty);
        }

        /// <summary>
        /// Sets the Name property.  This dependency property
        /// indicates the region name of the layout item.
        /// </summary>
        public static void SetName(DependencyObject d, string value)
        {
            d.SetValue(NameProperty, value);
        }

        /// <summary>
        /// Handles changes to the Name property.
        /// </summary>
        private static void OnNameChanged(DependencyObject s, DependencyPropertyChangedEventArgs e)
        {
            CreateRegion(s, (string)e.NewValue);
        }

        #endregion Name

        private static void CreateRegion(object element, string regionName)
        {
            if (element == null)
                throw new ArgumentNullException("element");

            //If I'm in design mode the main window is not set
            if (Application.Current == null ||
                Application.Current.MainWindow == null)
                return;

            try
            {
                if (ServiceLocator.Current == null)
                    return;

                // Build the region
                var mappings = ServiceLocator.Current.GetInstance<RegionAdapterMappings>();
                if (mappings == null)
                    return;
                IRegionAdapter regionAdapter = mappings.GetMapping(element.GetType());
                if (regionAdapter == null)
                    return;

                regionAdapter.Initialize(element, regionName);
            }
            catch (Exception ex)
            {
                throw new RegionCreationException(string.Format("Unable to create region {0}", regionName), ex);
            }
        }

4-DockingManagerRegionAdapter

 [Export(typeof(DockingManagerRegionAdapter))]
    [PartCreationPolicy(CreationPolicy.NonShared)]
    public class DockingManagerRegionAdapter : RegionAdapterBase<DockingManager>
    {
        [ImportingConstructor]
        public DockingManagerRegionAdapter(IRegionBehaviorFactory regionBehaviorFactory)
            : base(regionBehaviorFactory)
        {
        }

        protected override void Adapt(IRegion region, DockingManager regionTarget)
        {
        }

        protected override IRegion CreateRegion()
        {
            return new Region();
        }

        protected override void AttachBehaviors(IRegion region, DockingManager regionTarget)
        {
            if (region == null)
                throw new System.ArgumentNullException("region");

            // Add the behavior that syncs the items source items with the rest of the items
            region.Behaviors.Add(DockingManagerDocumentsSourceSyncBehavior.BehaviorKey, new DockingManagerDocumentsSourceSyncBehavior
            {
                HostControl = regionTarget
            });

            base.AttachBehaviors(region, regionTarget);
        }

and Here is the part of XAML of my ShellWindow that contains AvalonDock:

<avalonDock:DockingManager x:Name="dockingManager">
            <avalonDock:LayoutRoot>
                <avalonDock:LayoutPanel Orientation="Horizontal">
                    <!--Control Panel-->
                    <avalonDock:LayoutAnchorablePaneGroup DockWidth="150" Orientation="Vertical">
                        <avalonDock:LayoutAnchorablePane>
                            <avalonDock:LayoutAnchorable Title="Systems"  regAdapters:AvalonDockRegion.Name="{x:Static inf:RegionNames.SubsystemRegion}">
                                <!--<TextBox/>-->
                            </avalonDock:LayoutAnchorable>
                            <avalonDock:LayoutAnchorable Title="Piping" regAdapters:AvalonDockRegion.Name="{x:Static inf:RegionNames.TestPackRegion}">
                                <!--<TextBox/>-->
                            </avalonDock:LayoutAnchorable>
                            <avalonDock:LayoutAnchorable Title="Equipment" regAdapters:AvalonDockRegion.Name="{x:Static inf:RegionNames.EquipmentListRegion}">
                                <!--<TextBox/>-->
                            </avalonDock:LayoutAnchorable>
                        </avalonDock:LayoutAnchorablePane>
                        <avalonDock:LayoutAnchorablePane>
                            <avalonDock:LayoutAnchorable Title="Tool 3">
                             </avalonDock:LayoutAnchorable>
                            <avalonDock:LayoutAnchorable Title="Tool 4">
                            </avalonDock:LayoutAnchorable>
                        </avalonDock:LayoutAnchorablePane>
                    </avalonDock:LayoutAnchorablePaneGroup>
                    <!--Main Pane-->
                    <avalonDock:LayoutDocumentPane >
                                                <avalonDock:LayoutDocument regAdapters:AvalonDockRegion.Name="{x:Static inf:RegionNames.MainRegion}"/>

                    </avalonDock:LayoutDocumentPane>
                    <!--Auxilary Panes-->
                    <avalonDock:LayoutAnchorablePaneGroup DockWidth="150" Orientation="Vertical">
                        <avalonDock:LayoutAnchorablePane>
                            <avalonDock:LayoutAnchorable Title="Tool 1">
                            </avalonDock:LayoutAnchorable>
                            <avalonDock:LayoutAnchorable Title="Tool 2">
                            </avalonDock:LayoutAnchorable>
                        </avalonDock:LayoutAnchorablePane>
                        <avalonDock:LayoutAnchorablePane>
                            <avalonDock:LayoutAnchorable Title="Tool 3">
                                
                            </avalonDock:LayoutAnchorable>
                            <avalonDock:LayoutAnchorable Title="Tool 4">
                            </avalonDock:LayoutAnchorable>
                        </avalonDock

and here is the override of RegionAdapterMappings in the Bootstrapper

please see next because it is limited by 1000 letter