Initial idea for the boss fight UI but it's just a temporary holder for now.

boss_fight_ui.cpp

@@ -0,0 +1,82 @@
+#include "boss_fight_ui.hpp"
+#include "easings.hpp"
+
+namespace gui {
+  BossFightUI::BossFightUI() {
+    $status.position(0, 0, 300, SCREEN_HEIGHT);
+    $status.layout(
+        "[(150)status_1|(150)status_2]"
+        "[(150)status_3|(150)status_4]"
+        "[(150)status_5|(150)status_6]"
+        "[(150)status_7|(150)status_8]"
+        );
+
+    $overlay.position(300, 0, SCREEN_WIDTH - 300, SCREEN_HEIGHT);
+    $overlay.layout("[overlay_1|overlay_2|overlay_3|overlay_4]"
+    "[overlay_5|overlay_6|overlay_7|overlay_8]"
+    "[overlay_9|overlay_10|overlay_11|overlay_12]"
+    "[overlay_13|overlay_14|overlay_15|overlay_16]");
+
+    $boss_image = textures::get("boss_fight");
+    auto bounds = $boss_image.sprite->getLocalBounds();
+    $boss_image.sprite->setPosition({300 + bounds.size.x / 2, bounds.size.y / 2});
+    $boss_image.sprite->setOrigin({bounds.size.x / 2, bounds.size.y / 2});
+  }
+
+  void BossFightUI::init() {
+    $status.world().set_the<Background>({$status.$parser});
+
+    for(auto& [name, cell] : $status.cells()) {
+      auto button = $status.entity(name);
+      $status.set<Rectangle>(button, {});
+      $status.set<Clickable>(button, {
+          [this, name](auto, auto){ fmt::println("STATUS: {}", name); }
+      });
+      $status.set<Label>(button, {name});
+    }
+    $status.init();
+
+    for(auto& [name, cell] : $overlay.cells()) {
+      auto region = $overlay.entity(name);
+      $overlay.set<Clickable>(region, {
+          [this, name](auto, auto){ fmt::println("OVERLAY: {}", name); }
+      });
+    }
+
+    auto region = $overlay.entity("overlay_2");
+    $overlay.set<Label>(region, {"THE RAT KING!"});
+    $overlay.init();
+  }
+
+  void BossFightUI::bounce_boss(sf::RenderWindow& window) {
+    auto time = $clock.getElapsedTime();
+    float tick = ease::in_out_back(ease::sine(time.asSeconds()));
+    float scale = std::lerp(1.1, 1.3, tick);
+    $boss_image.sprite->setScale({scale, scale});
+    window.draw(*$boss_image.sprite);
+  }
+
+  void BossFightUI::render(sf::RenderWindow& window) {
+    if($boss_hit) {
+      bounce_boss(window);
+    } else {
+      window.draw(*$boss_image.sprite);
+    }
+
+    $status.render(window);
+    $overlay.render(window);
+  }
+
+  bool BossFightUI::mouse(float x, float y) {
+    if($status.mouse(x, y)) {
+      fmt::println("STATUS");
+    }
+
+    if($overlay.mouse(x, y)) {
+      fmt::println("OVERLAY");
+      $boss_hit = !$boss_hit;
+    }
+
+    return false;
+  }
+}