Show quit game prompt when attempting to close window (#13)

include/recomp_input.h

@@ -166,6 +166,8 @@ namespace recomp {
     // TODO move these
     void quicksave_save();
     void quicksave_load();
+
+    void open_quit_game_prompt();
 }
 
 #endif

src/game/input.cpp

@@ -128,9 +128,19 @@ bool sdl_event_filter(void* userdata, SDL_Event* event) {
             InputState.controller_states.erase(controller_event->which);
         }
         break;
-    case SDL_EventType::SDL_QUIT:
-        ultramodern::quit();
-        return true;
+    case SDL_EventType::SDL_QUIT: {
+        if (!ultramodern::is_game_started()) {
+            ultramodern::quit();
+            return true;
+        }
+
+        if (recomp::get_current_menu() != recomp::Menu::Config) {
+            recomp::set_current_menu(recomp::Menu::Config);
+        }
+
+        recomp::open_quit_game_prompt();
+        break;
+    }
     case SDL_EventType::SDL_MOUSEWHEEL:
         {
             SDL_MouseWheelEvent* wheel_event = &event->wheel;    

src/ui/ui_config.cpp

@@ -246,7 +246,7 @@ void close_config_menu() {
 	close_config_menu_impl();
 }
 
-void open_quit_game_prompt() {
+void recomp::open_quit_game_prompt() {
 	prompt_context.open_prompt(
 		"Are you sure you want to quit?",
 		"Any progress since your last save will be lost.",
@@ -466,7 +466,7 @@ public:
 
 		recomp::register_event(listener, "open_quit_game_prompt",
 			[](const std::string& param, Rml::Event& event) {
-				open_quit_game_prompt();
+				recomp::open_quit_game_prompt();
 			});
 
 		recomp::register_event(listener, "toggle_input_device",