Navigator window changes merge to apd-master.

ExtendedWPFToolkitSolution/Src/Xceed.Wpf.AvalonDock/Controls/NavigatorWindow.cs

@@ -244,40 +244,40 @@ namespace Xceed.Wpf.AvalonDock.Controls
       _documentListBox = this.GetTemplateChild( PART_DocumentListBox ) as ListBox;
     }
 
-    protected override void OnPreviewKeyDown( System.Windows.Input.KeyEventArgs e )
+	  protected override void OnPreviewKeyDown(System.Windows.Input.KeyEventArgs e)
 	  {
 		  bool shouldHandle = false;
 
 		  // Press Tab to switch Selected LayoutContent.
-      if( e.Key == System.Windows.Input.Key.Tab )
+		  if (e.Key == System.Windows.Input.Key.Tab)
 		  {
 			  // Selecting LayoutDocuments
-        if( _isSelectingDocument )
+			  if (_isSelectingDocument)
 			  {
-          if( this.SelectedDocument != null )
+				  if (this.SelectedDocument != null)
 				  {
 					  // Jump to next LayoutDocument
-            var docIndex = this.Documents.IndexOf<LayoutDocumentItem>( this.SelectedDocument );
+					  var docIndex = this.Documents.IndexOf<LayoutDocumentItem>(this.SelectedDocument);
-            if( docIndex < ( this.Documents.Length - 1 ) )
+					  if (docIndex < (this.Documents.Length - 1))
 					  {
 						  this.SelectNextDocument();
 						  shouldHandle = true;
 					  }
 						// Jump to first LayoutAnchorable
-            else if( this.Anchorables.Count() > 0 )
+						else if (this.Anchorables.Count() > 0)
 						{
 							_isSelectingDocument = false;
-              this.InternalSetSelectedDocument( null );
+							this.InternalSetSelectedDocument(null);
-              this.InternalSetSelectedAnchorable( this.Anchorables.First() );
+							this.InternalSetSelectedAnchorable(this.Anchorables.First());
 							shouldHandle = true;
 						}
 					}
 				  // There is no SelectedDocument, select the first one.
 				  else
 				  {
-            if( this.Documents.Length > 0 )
+					  if (this.Documents.Length > 0)
 					  {
-              this.InternalSetSelectedDocument( this.Documents[ 0 ] );
+						  this.InternalSetSelectedDocument(this.Documents[0]);
 						  shouldHandle = true;
 					  }
 				  }
@@ -285,41 +285,48 @@ namespace Xceed.Wpf.AvalonDock.Controls
 			  // Selecting LayoutAnchorables
 			  else
 			  {
-          if( this.SelectedAnchorable != null )
+				  if (this.SelectedAnchorable != null)
 				  {
 					  // Jump to next LayoutAnchorable
-            var anchorableIndex = this.Anchorables.ToArray().IndexOf<LayoutAnchorableItem>( this.SelectedAnchorable );
+					  var anchorableIndex = this.Anchorables.ToArray()
-            if( anchorableIndex < ( this.Anchorables.Count() - 1 ) )
+						  .IndexOf<LayoutAnchorableItem>(this.SelectedAnchorable);
+					  if (anchorableIndex < (this.Anchorables.Count() - 1))
 					  {
 						  this.SelectNextAnchorable();
 						  shouldHandle = true;
 					  }
 					  // Jump to first LayoutDocument
-            else if( this.Documents.Length > 0 )
+					  else if (this.Documents.Length > 0)
 					  {
 						  _isSelectingDocument = true;
-              this.InternalSetSelectedAnchorable( null );
+						  this.InternalSetSelectedAnchorable(null);
-              this.InternalSetSelectedDocument( this.Documents[ 0 ] );
+						  this.InternalSetSelectedDocument(this.Documents[0]);
+						  shouldHandle = true;
+					  }
+					  else if (!this.Documents.Any() && this.Anchorables.Any())
+					  {
+						  this.InternalSetSelectedAnchorable(this.Anchorables.ToArray()[0]);
 						  shouldHandle = true;
 					  }
 				  }
 				  // There is no SelectedAnchorable, select the first one.
 				  else
 				  {
-            if( this.Anchorables.Count() > 0 )
+					  if (this.Anchorables.Count() > 0)
 					  {
-              this.InternalSetSelectedAnchorable( this.Anchorables.ToArray()[ 0 ] );
+						  this.InternalSetSelectedAnchorable(this.Anchorables.ToArray()[0]);
 						  shouldHandle = true;
 					  }
 				  }
 			  }
 		  }
 
-      if( shouldHandle )
+		  if (shouldHandle)
 		  {
 			  e.Handled = true;
 		  }
-      base.OnPreviewKeyDown( e );
+
+		  base.OnPreviewKeyDown(e);
 	  }
 
 	  protected override void OnPreviewKeyUp( System.Windows.Input.KeyEventArgs e )