Prepering event handling from application side

bakara/src/bakara/core/application.cpp

@@ -4,10 +4,16 @@ namespace Bk {
     Application::Application() 
     { 
         p_window = Window::create_window();
+        p_window->set_event_callback(BK_BIND_EVENT_FN(Application::on_event));
     }
 
     Application::~Application() { }
 
+    void Application::on_event(Event& e)
+    {
+        BK_CORE_INFO("Event : {0}", EVENT_STRING(e));
+    }
+
     void Application::run() 
     {
         while (p_running)

bakara/src/bakara/core/application.h

@@ -2,14 +2,18 @@
 
 #include <bkpch.h>
 #include "window.h"
+#include <bakara/events/event.h>
 
 namespace Bk {
+
+    #define BK_BIND_EVENT_FN(fn) std::bind(&fn, this, std::placeholders::_1)
+
     class Application 
     {
         public:
             Application();
             virtual ~Application();
-        
+            void on_event(Event& e);
             void run();
         private:
             std::unique_ptr<Window> p_window;

bakara/src/bakara/events/event.h

@@ -40,8 +40,16 @@ namespace Bk {
 								virtual const char* get_name() const override { return BK_STRINGIFY(type); }
 
     #define EVENT_CLASS_CATEGORY(category) virtual int get_category_flags() const override { return category; }
+    
+    #ifdef BK_DEBUG
+        #define EVENT_STRINGIFY(str, ...) std::string to_string() const override { return format(str, __VA_ARGS__); }
 
-    #define EVENT_STRINGIFY(str, ...) std::string to_string() const override { return format(str, __VA_ARGS__); }
+        #define EVENT_STRING(event) event.to_string()
+    #else 
+        #define EVENT_STRINGIFY(str, ...) 
+
+        #define EVENT_STRING(event)
+    #endif
 
     class Event 
     {
@@ -62,11 +70,6 @@ namespace Bk {
             }
     };
 
-    inline std::ostream& operator<<(std::ostream& os, Event& e)  
-    {
-        return os << e.to_string();
-    }
-
 	class EventDispatcher
 	{
         public:

bakara/src/bakara/events/window_event.h

@@ -25,9 +25,11 @@ namespace Bk {
 
     class WindowCloseEvent : public Event 
     {
-        WindowCloseEvent() = default;
+        public:
+            WindowCloseEvent() = default;
 
-        EVENT_CLASS_TYPE(WindowClose)
+            EVENT_CLASS_TYPE(WindowClose)
-        EVENT_CLASS_CATEGORY(AppCategory)
+            EVENT_CLASS_CATEGORY(AppCategory)
+            EVENT_STRINGIFY("Window closing%s", ".")
     };
 }