Select a mission

include/widgets.h

@@ -85,10 +85,16 @@ public:
 
   virtual void draw() override;
 
+  void select_next();
+  void select_prev();
+  size_t get_selection();
+
 protected:
   int element_height;
   Alignment element_alignment;
 
+  size_t selection;
+
   std::vector<Widget*> elements;
 
   void place_element(Widget* element, int index);