diff --git a/libs/ui/include/psemek/ui/element.hpp b/libs/ui/include/psemek/ui/element.hpp
index 9acfae49..5b76f2ba 100644
--- a/libs/ui/include/psemek/ui/element.hpp
+++ b/libs/ui/include/psemek/ui/element.hpp
@@ -63,6 +63,8 @@ namespace psemek::ui
 		virtual void hide() { set_hidden(true); }
 		virtual void show() { set_hidden(false); }
 
+		virtual bool transparent() const { return false; }
+
 		virtual std::shared_ptr<struct style const> style() const { return style_; }
 		virtual std::shared_ptr<struct style const> own_style() const { return own_style_; }
 		virtual std::shared_ptr<struct style const> set_style(std::shared_ptr<struct style const> st);
diff --git a/libs/ui/include/psemek/ui/event_interceptor.hpp b/libs/ui/include/psemek/ui/event_interceptor.hpp
index d027a2bc..8a404571 100644
--- a/libs/ui/include/psemek/ui/event_interceptor.hpp
+++ b/libs/ui/include/psemek/ui/event_interceptor.hpp
@@ -25,6 +25,8 @@ namespace psemek::ui
 		bool on_event(mouse_wheel const & event) override;
 		bool on_event(key_press   const & event) override;
 
+		bool transparent() const override { return true; }
+
 		void draw(painter &) const override {}
 
 	private:
diff --git a/libs/ui/include/psemek/ui/grid_layout.hpp b/libs/ui/include/psemek/ui/grid_layout.hpp
index 3e194c14..184ae2d8 100644
--- a/libs/ui/include/psemek/ui/grid_layout.hpp
+++ b/libs/ui/include/psemek/ui/grid_layout.hpp
@@ -52,6 +52,8 @@ namespace psemek::ui
 		struct shape const & shape() const override { return shape_; }
 		void reshape(geom::box<float, 2> const & bbox) override;
 
+		bool transparent() const override { return true; }
+
 		void draw(painter &) const override {}
 
 		~grid_layout() override;
diff --git a/libs/ui/include/psemek/ui/image_view.hpp b/libs/ui/include/psemek/ui/image_view.hpp
index 7ee6320d..aec9d3aa 100644
--- a/libs/ui/include/psemek/ui/image_view.hpp
+++ b/libs/ui/include/psemek/ui/image_view.hpp
@@ -31,6 +31,8 @@ namespace psemek::ui
 
 		geom::box<float, 2> size_constraints() const override;
 
+		bool transparent() const override { return true; }
+
 		void draw(painter & p) const override;
 
 	private:
diff --git a/libs/ui/include/psemek/ui/label.hpp b/libs/ui/include/psemek/ui/label.hpp
index 8bc5616d..15e93011 100644
--- a/libs/ui/include/psemek/ui/label.hpp
+++ b/libs/ui/include/psemek/ui/label.hpp
@@ -75,6 +75,8 @@ namespace psemek::ui
 		void style_updated() override;
 		void own_style_updated() override;
 
+		bool transparent() const override { return true; }
+
 		void draw(painter & p) const override;
 
 	protected:
diff --git a/libs/ui/include/psemek/ui/positioner.hpp b/libs/ui/include/psemek/ui/positioner.hpp
index 6fb09112..08a5c71c 100644
--- a/libs/ui/include/psemek/ui/positioner.hpp
+++ b/libs/ui/include/psemek/ui/positioner.hpp
@@ -28,6 +28,8 @@ namespace psemek::ui
 
 		virtual void set_position(geom::point<float, 2> const & p, x_align x, y_align y, bool clamp = true);
 
+		bool transparent() const override { return true; }
+
 		void draw(ui::painter &) const override {}
 
 	private:
diff --git a/libs/ui/include/psemek/ui/screen.hpp b/libs/ui/include/psemek/ui/screen.hpp
index 6b54ba16..5f8dfa99 100644
--- a/libs/ui/include/psemek/ui/screen.hpp
+++ b/libs/ui/include/psemek/ui/screen.hpp
@@ -42,6 +42,8 @@ namespace psemek::ui
 
 		geom::box<float, 2> size_constraints() const override;
 
+		bool transparent() const override { return true; }
+
 		void draw(painter &) const override {}
 
 		~screen() override;
diff --git a/libs/ui/source/controller.cpp b/libs/ui/source/controller.cpp
index f60e4f82..7af3983f 100644
--- a/libs/ui/source/controller.cpp
+++ b/libs/ui/source/controller.cpp
@@ -41,6 +41,11 @@ namespace psemek::ui
 				return root->size_constraints();
 			}
 
+			bool transparent() const override
+			{
+				return true;
+			}
+
 			void draw(painter &) const override {}
 
 			std::shared_ptr<element> root;