It's actually better to just use FTXUI's Modal system than to invent my own.

gui.cpp

@@ -34,7 +34,6 @@ GUI::GUI(DinkyECS::World &world, Map& game_map) :
   $log({{"Welcome to the game!"}}),
   $status_ui(SCREEN_X, SCREEN_Y, 0, 0),
   $map_view(0, 0, GAME_MAP_POS, 0, false),
-  $modal_test(SCREEN_X/2, SCREEN_Y/4, 800, 200, false),
   $view_port{0,0},
   $world(world),
   $sounds("./assets"),
@@ -72,25 +71,26 @@ void GUI::create_renderer() {
   }));
 
   auto modal_buttons = Container::Horizontal({
-      Button("OK", [&]{ println("OK pressed");  }),
+      Button("OK", [&]{ $show_modal = false; }),
-      Button("CANCEL", [&]{ println("CANCEL pressed"); }),
+      Button("CANCEL", [&]{ $show_modal = false; }),
   });
 
-  $modal_test.set_renderer(Renderer([&, modal_buttons] {
+  auto modal_test = Renderer([&, modal_buttons] {
     return hbox({
         hflow(
           vbox(
               text("Hello!"),
               modal_buttons->Render()
             ))}) | border;
-  }));
+  });
+  modal_test->Add(modal_buttons);
 
   auto test_button = Container::Horizontal({
       Button("Open Test Modal", [&]{ $show_modal = true; }),
       Button("Close It", [&]{ $show_modal = false; }),
   });
 
-  auto status_rend = Renderer(test_button, [&, test_button, player]{
+  auto status_rend = Renderer(test_button, [&, modal_test, test_button, player]{
     const auto& player_combat = $world.get<Combat>(player.entity);
     const auto& inventory = $world.get<Inventory>(player.entity);
     $status_text = player_combat.hp > 0 ? "NOT DEAD" : "DEAD!!!!!!";
@@ -118,7 +118,10 @@ void GUI::create_renderer() {
     });
   });
 
+  status_rend |= Modal(modal_test, &$show_modal);
+
   $status_ui.set_renderer(status_rend);
+  $status_ui.add(modal_test);
 }
 
 void GUI::handle_world_events() {
@@ -240,10 +243,6 @@ void GUI::render_scene() {
   $renderer.draw_text($status_ui);
   $renderer.draw_grid($map_view);
 
-  if($show_modal) {
-    $renderer.draw_text($modal_test);
-  }
-
   $renderer.display();
 }
 

gui.hpp

@@ -43,7 +43,6 @@ class GUI {
   ActionLog $log;
   Panel $status_ui;
   Panel $map_view;
-  Panel $modal_test;
   bool $show_modal = false;
   Point $view_port;
   Component $test_button;

render.cpp

@@ -217,15 +217,17 @@ void SFMLRender::render_text(const std::wstring &text, float start_x, float star
 }
 
 void SFMLRender::draw_text(Panel &panel, bool with_border) {
+  int border_px = with_border ? UI_PANEL_BORDER_PX : 0;
+
   sf::RectangleShape backing(
-      sf::Vector2f($ui_bounds.width * panel.width,
+      sf::Vector2f($ui_bounds.width * panel.width + border_px,
-        $ui_bounds.height * panel.height));
+        $ui_bounds.height * panel.height + border_px));
 
   backing.setFillColor(sf::Color(0, 0, 0));
 
   if(with_border) {
-    backing.setOutlineColor(color(Value::MID));
+    backing.setOutlineColor($default_fg);
-    backing.setOutlineThickness(5);
+    backing.setOutlineThickness(border_px);
   }
 
   backing.setPosition(panel.x, panel.y);

render.hpp

@@ -23,6 +23,7 @@ const int BASE_MAP_FONT_SIZE=90;
 const wchar_t BG_TILE = L'█';
 const wchar_t UI_BASE_CHAR = L'█';
 const int BG_BOX_OFFSET=5;
+const int UI_PANEL_BORDER_PX=5;
 
 enum class Value {
   BLACK=0, DARK_DARK, DARK_MID,