diff -r a38aec91bd66 -r a56c2baa9429 ui/wpf/UIcore/Container.cs
--- a/ui/wpf/UIcore/Container.cs	Sat Jan 31 11:51:54 2015 +0100
+++ b/ui/wpf/UIcore/Container.cs	Sun Feb 01 10:35:07 2015 +0100
@@ -19,9 +19,8 @@
         HORIZONTAL
     }
 
-    public class BoxContainer : Container
+    public class BoxContainer : Grid, Container
     {
-        public Grid Grid;
         public BoxOrientation Orientation;
 
         private int x = 0;
@@ -29,23 +28,27 @@
 
         private bool filled = false;
 
-        public BoxContainer(Grid grid, BoxOrientation orientation)
+        public BoxContainer(BoxOrientation orientation) : base()
         {
-            Grid = grid;
             Orientation = orientation;
             if(Orientation == BoxOrientation.HORIZONTAL)
             {
                 RowDefinition row = new RowDefinition();
                 row.Height = new GridLength(1, GridUnitType.Star);
-                Grid.RowDefinitions.Add(row);
+                RowDefinitions.Add(row);
             }
             else
             {
                 ColumnDefinition col = new ColumnDefinition();
                 col.Width = new GridLength(1, GridUnitType.Star);
-                Grid.ColumnDefinitions.Add(col);
+                ColumnDefinitions.Add(col);
             }
         }
+
+        public BoxContainer(Container parent, BoxOrientation orientation) : this(orientation)
+        {
+            parent.Add(this, true);
+        }
         
         public void Add(UIElement control, bool fill)
         {
@@ -66,7 +69,7 @@
                 {
                     col.Width = GridLength.Auto;
                 }
-                Grid.ColumnDefinitions.Add(col);
+                ColumnDefinitions.Add(col);
             }
             else
             {
@@ -85,12 +88,12 @@
                 {
                     row.Height = GridLength.Auto;
                 }
-                Grid.RowDefinitions.Add(row);
+                RowDefinitions.Add(row);
             }
 
             Grid.SetColumn(control, x);
             Grid.SetRow(control, y);
-            Grid.Children.Add(control);
+            Children.Add(control);
 
             if(Orientation == BoxOrientation.HORIZONTAL)
             {
@@ -101,6 +104,11 @@
                 y++;
             }
         }
+
+        public static BoxContainer CreateBoxContainer(Container parent, BoxOrientation orientation)
+        {
+            return Application.GetInstance().Exec<BoxContainer>(() => new BoxContainer(parent, orientation));
+        }
     }
     
     public class GridContainer : Container