Menu screen prototype, refactor

src/frontend/screens.h

@@ -1,6 +1,7 @@
 #ifndef FRONTEND_SCREENS_H_
 #define FRONTEND_SCREENS_H_
 
+#include <memory>
 #include "../settings.h"
 
 class Assets;
@@ -8,6 +9,11 @@ class Level;
 class WorldRenderer;
 class HudRenderer;
 class Engine;
+class Camera;
+
+namespace gui {
+    class UINode;
+}
 
 
 /* Screen is a mainloop state */
@@ -21,6 +27,16 @@ public:
     virtual void draw(float delta) = 0;
 };
 
+class MenuScreen : public Screen {
+    std::shared_ptr<gui::UINode> panel;
+public:
+    MenuScreen(Engine* engine);
+    ~MenuScreen();
+
+    void update(float delta) override;
+    void draw(float delta) override;
+};
+
 class LevelScreen : public Screen {
     Level* level;
     WorldRenderer* worldRenderer;