[add]: Application manager and EventDispatcher

1 files changed, 86 insertions, 0 deletions

diff --git a/src/Core/Application.cpp b/src/Core/Application.cpp
new file mode 100644
index 0000000..9ca060c
--- /dev/null
+++ b/src/Core/Application.cpp
@@ -0,0 +1,86 @@
+#include "Application.h"
+#include <iostream>
+
+namespace Donut
+{
+    Application* Application::s_Instance = nullptr;
+
+    Application::Application(const std::string& name, int width, int height)
+        : m_Running(true), m_Minimized(false)
+    {
+        s_Instance = this;
+
+        m_Window = std::make_unique<Window>(name, width, height);
+        m_Window->SetEventCallback([this](Event& event) 
+        {
+            OnEvent(event);
+        });
+
+        OnInit();
+    }
+
+    Application::~Application()
+    {
+        OnShutdown();
+        s_Instance = nullptr;
+    }
+
+    void Application::Run()
+    {
+        while (m_Running)
+        {
+            if (!m_Minimized)
+            {
+                OnUpdate();
+                OnRender();
+            }
+
+            m_Window->OnUpdate();
+        }
+    }
+
+    void Application::Close()
+    {
+        m_Running = false;
+    }
+
+    void Application::OnEvent(Event& event)
+    {
+        EventDispatcher dispatcher(event);
+        dispatcher.Dispatch<WindowCloseEvent>([this, &event](WindowCloseEvent& e) 
+        {
+            m_Running = false;
+            event.Handled = true;
+            return true;
+        });
+        
+        dispatcher.Dispatch<WindowResizeEvent>([this, &event](WindowResizeEvent& e) 
+        {
+            if (e.GetWidth() == 0 || e.GetHeight() == 0)
+                m_Minimized = true;
+            else
+                m_Minimized = false;
+            
+            event.Handled = true;
+            return true;
+        });
+        
+        dispatcher.Dispatch<KeyPressedEvent>([this, &event](KeyPressedEvent& e) 
+        {
+            if (e.GetKeyCode() == 256)
+                Close();
+            return true;
+        });
+    }
+
+    void Application::OnInit()     { }
+    void Application::OnShutdown() { }
+
+    void Application::OnUpdate()
+    {
+    }
+
+    void Application::OnRender()
+    {
+    }
+}