feat: window is open

include/window/window.h

@@ -19,12 +19,15 @@ private:
 
     int m_width;
     int m_height;
+
+    bool m_is_open;
 public:
     Window();
     ~Window();
 public:
     [[nodiscard]] inline int GetWidth() const { return m_width; }
     [[nodiscard]] inline int GetHeight() const { return m_height; }
+    [[nodiscard]] inline bool IsOpen() const { return m_is_open; }
 public:
     void ProcessEvents();
 public:

src/renderer/engine.cpp

@@ -31,7 +31,7 @@ Engine::Engine() {
 }
 
 bool Engine::Running() const {
-    return m_isRunning;
+    return m_isRunning && m_window->IsOpen();
 }
 
 void Engine::Stop() {

src/window/window.cpp

@@ -61,6 +61,8 @@ Window::Window() {
     glDebugMessageCallback(MessageCallback, nullptr);
 
     glViewport(0, 0, m_width, m_height);
+
+    m_is_open = true;
 }
 
 void Window::ProcessEvents() {