diff --git a/libs/ui/include/psemek/ui/asymmetric.hpp b/libs/ui/include/psemek/ui/asymmetric.hpp
new file mode 100644
index 00000000..e0121315
--- /dev/null
+++ b/libs/ui/include/psemek/ui/asymmetric.hpp
@@ -0,0 +1,18 @@
+#pragma once
+
+#include <psemek/ui/element.hpp>
+
+namespace psemek::ui
+{
+
+	struct asymmetric
+		: element
+	{
+		virtual void set_width_first(bool value);
+		virtual bool width_first() const { return width_first_; }
+
+	protected:
+		bool width_first_ = true;
+	};
+
+}
diff --git a/libs/ui/include/psemek/ui/container.hpp b/libs/ui/include/psemek/ui/container.hpp
index 98e7e944..b99554dd 100644
--- a/libs/ui/include/psemek/ui/container.hpp
+++ b/libs/ui/include/psemek/ui/container.hpp
@@ -1,12 +1,12 @@
 #pragma once
 
-#include <psemek/ui/element.hpp>
+#include <psemek/ui/asymmetric.hpp>
 
 namespace psemek::ui
 {
 
 	struct container
-		: element
+		: asymmetric
 	{
 		virtual bool add_child(std::shared_ptr<element> c) = 0;
 		virtual bool has_child(element * c) const = 0;
diff --git a/libs/ui/include/psemek/ui/grid_layout.hpp b/libs/ui/include/psemek/ui/grid_layout.hpp
index 19469da2..347521b2 100644
--- a/libs/ui/include/psemek/ui/grid_layout.hpp
+++ b/libs/ui/include/psemek/ui/grid_layout.hpp
@@ -40,9 +40,6 @@ namespace psemek::ui
 		virtual void set_outer_margin(bool value);
 		virtual bool outer_margin() const { return outer_margin_; }
 
-		virtual void set_width_first(bool value);
-		virtual bool width_first() const { return width_first_; }
-
 		geom::box<float, 2> size_constraints() const override;
 
 		geom::interval<float> width_constraints(float height) const override;
@@ -70,7 +67,6 @@ namespace psemek::ui
 		std::vector<float> column_weight_;
 
 		bool outer_margin_ = true;
-		bool width_first_ = true;
 
 		box_shape shape_;
 	};
diff --git a/libs/ui/include/psemek/ui/single_container.hpp b/libs/ui/include/psemek/ui/single_container.hpp
index 5aff6644..3a75758d 100644
--- a/libs/ui/include/psemek/ui/single_container.hpp
+++ b/libs/ui/include/psemek/ui/single_container.hpp
@@ -1,12 +1,12 @@
 #pragma once
 
-#include <psemek/ui/element.hpp>
+#include <psemek/ui/asymmetric.hpp>
 
 namespace psemek::ui
 {
 
 	struct single_container
-		: element
+		: asymmetric
 	{
 		children_range children() const override { return children_; }
 
diff --git a/libs/ui/source/asymmetric.cpp b/libs/ui/source/asymmetric.cpp
new file mode 100644
index 00000000..d81541de
--- /dev/null
+++ b/libs/ui/source/asymmetric.cpp
@@ -0,0 +1,12 @@
+#include <psemek/ui/asymmetric.hpp>
+
+namespace psemek::ui
+{
+
+	void asymmetric::set_width_first(bool value)
+	{
+		width_first_ = value;
+		post_reshape();
+	}
+
+}
diff --git a/libs/ui/source/grid_layout.cpp b/libs/ui/source/grid_layout.cpp
index 0734e3d8..7dc1e64d 100644
--- a/libs/ui/source/grid_layout.cpp
+++ b/libs/ui/source/grid_layout.cpp
@@ -149,12 +149,6 @@ namespace psemek::ui
 		post_reshape();
 	}
 
-	void grid_layout::set_width_first(bool value)
-	{
-		width_first_ = value;
-		post_reshape();
-	}
-
 	template <int Dimension>
 	static std::vector<geom::interval<float>> cell_sizes(util::array<std::shared_ptr<element>, 2> const & children)
 	{