Fnct. to add overlay elems

GlosSITarget/Overlay.cpp

@@ -1,10 +1,12 @@
 #include "Overlay.h"
 
+#include <utility>
+
 #define IMGUI_USER_CONFIG "imconfig.h"
 #include "imgui-SFML.h"
 #include "imgui.h"
 
-Overlay::Overlay(sf::RenderWindow& window, std::function<void()> on_close) : window_(window), on_close_(on_close)
+Overlay::Overlay(sf::RenderWindow& window, const std::function<void()>& on_close) : window_(window), on_close_(on_close)
 {
     ImGui::SFML::Init(window_);
     ImGuiIO& io = ImGui::GetIO();
@@ -104,7 +106,7 @@ void Overlay::update()
     if (enabled_) {
         window_.clear(sf::Color(0, 0, 0, 64)); // make window slightly dim screen with overlay
 
-
+        std::ranges::for_each(OVERLAY_ELEMS_, [](const auto& fn) { fn(); });
 
         if (closeButton()) {
             return;
@@ -124,11 +126,16 @@ void Overlay::Shutdown()
     ImGui::SFML::Shutdown();
 }
 
-void Overlay::ShowNotification(const spdlog::details::log_msg& msg)
+void Overlay::AddLog(const spdlog::details::log_msg& msg)
 {
     LOG_MSGS_.push_back({.time = msg.time, .level = msg.level, .payload = msg.payload.data()});
 }
 
+void Overlay::AddOverlayElem(const std::function<void()>& elem_fn)
+{
+    OVERLAY_ELEMS_.push_back(elem_fn);
+}
+
 void Overlay::showLogs() const
 {
     std::vector<Log> logs;

GlosSITarget/Overlay.h

@@ -7,7 +7,7 @@
 
 class Overlay {
   public:
-    Overlay(sf::RenderWindow& window, std::function<void()> on_close);
+    Overlay(sf::RenderWindow& window, const std::function<void()>& on_close);
 
     void setEnabled(bool enabled);
     bool isEnabled() const;
@@ -15,15 +15,17 @@ class Overlay {
     void update();
     static void ProcessEvent(sf::Event evnt);
     static void Shutdown();
-    static void ShowNotification(const spdlog::details::log_msg& msg);
+    static void AddLog(const spdlog::details::log_msg& msg);
+
+    static void AddOverlayElem(const std::function<void()>& elem_fn);
+
   private:
     sf::RenderWindow& window_;
     sf::Clock update_clock_;
     bool enabled_ = true;
     std::function<void()> on_close_;
     void showLogs() const;
-
-    bool closeButton() const;
+    [[nodiscard]] bool closeButton() const;
 
     struct Log {
         std::chrono::system_clock::time_point time;
@@ -33,4 +35,6 @@ class Overlay {
     static inline std::vector<Log> LOG_MSGS_;
     static constexpr int LOG_RETENTION_TIME_ = 5;
 
+    static inline std::vector<std::function<void()>> OVERLAY_ELEMS_;
+
 };

GlosSITarget/OverlayLogSink.h

@@ -14,7 +14,7 @@ class overlay_sink : public spdlog::sinks::base_sink<Mutex> {
   protected:
     void sink_it_(const spdlog::details::log_msg& msg) override
     {
-        Overlay::ShowNotification(msg);
+        Overlay::AddLog(msg);
     }
 
     void flush_() override