diff --git a/libs/app/include/psemek/app/scene.hpp b/libs/app/include/psemek/app/scene.hpp
index 742de2ce..1cd2d513 100644
--- a/libs/app/include/psemek/app/scene.hpp
+++ b/libs/app/include/psemek/app/scene.hpp
@@ -42,6 +42,9 @@ namespace psemek::app
 	struct scene_base
 		: scene
 	{
+		void on_scene_enter() override { active_ = true; }
+		void on_scene_exit() override { active_ = false; }
+
 		void on_resize(int width, int height) override { width_ = width; height_ = height; }
 
 		void on_mouse_move(int x, int y, int, int) override { mouse_ = geom::point{x, y}; }
@@ -54,6 +57,8 @@ namespace psemek::app
 		void on_key_down(SDL_Keycode key) override { keys_.insert(key); }
 		void on_key_up(SDL_Keycode key) override { keys_.erase(key); }
 
+		bool active() const { return active_; }
+
 		bool is_left_button_down() const { return left_button_down_; }
 		bool is_middle_button_down() const { return middle_button_down_; }
 		bool is_right_button_down() const { return right_button_down_; }
@@ -66,6 +71,8 @@ namespace psemek::app
 		int height() const { return height_; }
 
 	private:
+		bool active_ = false;
+
 		int width_ = 0;
 		int height_ = 0;