I can make a map with one room 'randomly' generated and calculate paths.

main.cpp

@@ -39,7 +39,7 @@ int main() {
   using namespace ftxui;
   std::string reset_position;
 
-  auto c = Canvas(100, 100);
+  auto c = Canvas(150, 100);
 
   Map game_map = Map(input, walls, 1000);
 
@@ -53,13 +53,13 @@ int main() {
         const string tile = val == 1000 ? "#" : fmt::format("{}", result[y][x]);
 
 
-        c.DrawText(22+x*2, 24+y*4, tile);
+        c.DrawText(x*2, y*4, tile);
       }
     }
 
-    c.DrawText(20+4*2, 20+3*4, "@", Color::Blue);
+    c.DrawText(4*2, 3*4, "@", Color::Blue);
 
-    return canvas(c);
+    return canvas(c) | border;
   });
 
   while (true) {
@@ -71,7 +71,7 @@ int main() {
                   )  | xflex_grow
             ),
             separator(),
-            hflow(map->Render()),
+            hbox(map->Render()),
         }) | border;
 
     auto screen = Screen::Create(Dimension::Full());