true architecture

enginecustom/Systemclass.cpp

@@ -0,0 +1,290 @@
+#include "systemclass.h"
+
+SystemClass::SystemClass()
+{
+	m_Input = 0;
+	m_Application = 0;
+}
+
+SystemClass::SystemClass(const SystemClass& other)
+{
+}
+
+
+SystemClass::~SystemClass()
+{
+}
+
+bool SystemClass::Initialize()
+{
+	int screenWidth, screenHeight;
+	bool result;
+
+
+	// Initialize the width and height of the screen to zero before sending the variables into the function.
+	screenWidth = 0;
+	screenHeight = 0;
+
+	// Initialize the windows api.
+	InitializeWindows(screenWidth, screenHeight);
+
+	// Create and initialize the input object.  This object will be used to handle reading the keyboard input from the user.
+	m_Input = new InputClass;
+
+	m_Input->Initialize();
+
+	// Create and initialize the application class object.  This object will handle rendering all the graphics for this application.
+	m_Application = new ApplicationClass;
+
+	result = m_Application->Initialize(screenWidth, screenHeight, m_hwnd);
+	if (!result)
+	{
+		return false;
+	}
+
+	return true;
+}
+
+void SystemClass::Shutdown()
+{
+	// Release the application class object.
+	if (m_Application)
+	{
+		m_Application->Shutdown();
+		delete m_Application;
+		m_Application = 0;
+	}
+
+	// Release the input object.
+	if (m_Input)
+	{
+		delete m_Input;
+		m_Input = 0;
+	}
+
+	// Shutdown the window.
+	ShutdownWindows();
+
+	return;
+}
+
+void SystemClass::Run()
+{
+	MSG msg;
+	bool done, result;
+
+
+	// Initialize the message structure.
+	ZeroMemory(&msg, sizeof(MSG));
+
+	// Loop until there is a quit message from the window or the user.
+	done = false;
+	while (!done)
+	{
+		// Handle the windows messages.
+		if (PeekMessage(&msg, NULL, 0, 0, PM_REMOVE))
+		{
+			TranslateMessage(&msg);
+			DispatchMessage(&msg);
+		}
+
+		// If windows signals to end the application then exit out.
+		if (msg.message == WM_QUIT)
+		{
+			done = true;
+		}
+		else
+		{
+			// Otherwise do the frame processing.
+			result = Frame();
+			if (!result)
+			{
+				done = true;
+			}
+		}
+
+	}
+
+	return;
+}
+
+bool SystemClass::Frame()
+{
+	bool result;
+
+
+	// Check if the user pressed escape and wants to exit the application.
+	if (m_Input->IsKeyDown(VK_ESCAPE))
+	{
+		return false;
+	}
+
+	// Do the frame processing for the application class object.
+	result = m_Application->Frame();
+	if (!result)
+	{
+		return false;
+	}
+
+	return true;
+}
+
+LRESULT CALLBACK SystemClass::MessageHandler(HWND hwnd, UINT umsg, WPARAM wparam, LPARAM lparam)
+{
+	switch (umsg)
+	{
+		// Check if a key has been pressed on the keyboard.
+	case WM_KEYDOWN:
+	{
+		// If a key is pressed send it to the input object so it can record that state.
+		m_Input->KeyDown((unsigned int)wparam);
+		return 0;
+	}
+
+	// Check if a key has been released on the keyboard.
+	case WM_KEYUP:
+	{
+		// If a key is released then send it to the input object so it can unset the state for that key.
+		m_Input->KeyUp((unsigned int)wparam);
+		return 0;
+	}
+
+	// Any other messages send to the default message handler as our application won't make use of them.
+	default:
+	{
+		return DefWindowProc(hwnd, umsg, wparam, lparam);
+	}
+	}
+}
+
+void SystemClass::InitializeWindows(int& screenWidth, int& screenHeight)
+{
+	WNDCLASSEX wc;
+	DEVMODE dmScreenSettings;
+	int posX, posY;
+
+
+	// Get an external pointer to this object.	
+	ApplicationHandle = this;
+
+	// Get the instance of this application.
+	m_hinstance = GetModuleHandle(NULL);
+
+	// Give the application a name.
+	m_applicationName = L"Engine";
+
+	// Setup the windows class with default settings.
+	wc.style = CS_HREDRAW | CS_VREDRAW | CS_OWNDC;
+	wc.lpfnWndProc = WndProc;
+	wc.cbClsExtra = 0;
+	wc.cbWndExtra = 0;
+	wc.hInstance = m_hinstance;
+	wc.hIcon = LoadIcon(NULL, IDI_WINLOGO);
+	wc.hIconSm = wc.hIcon;
+	wc.hCursor = LoadCursor(NULL, IDC_ARROW);
+	wc.hbrBackground = (HBRUSH)GetStockObject(BLACK_BRUSH);
+	wc.lpszMenuName = NULL;
+	wc.lpszClassName = m_applicationName;
+	wc.cbSize = sizeof(WNDCLASSEX);
+
+	// Register the window class.
+	RegisterClassEx(&wc);
+
+	// Determine the resolution of the clients desktop screen.
+	screenWidth = GetSystemMetrics(SM_CXSCREEN);
+	screenHeight = GetSystemMetrics(SM_CYSCREEN);
+
+	// Setup the screen settings depending on whether it is running in full screen or in windowed mode.
+	if (FULL_SCREEN)
+	{
+		// If full screen set the screen to maximum size of the users desktop and 32bit.
+		memset(&dmScreenSettings, 0, sizeof(dmScreenSettings));
+		dmScreenSettings.dmSize = sizeof(dmScreenSettings);
+		dmScreenSettings.dmPelsWidth = (unsigned long)screenWidth;
+		dmScreenSettings.dmPelsHeight = (unsigned long)screenHeight;
+		dmScreenSettings.dmBitsPerPel = 32;
+		dmScreenSettings.dmFields = DM_BITSPERPEL | DM_PELSWIDTH | DM_PELSHEIGHT;
+
+		// Change the display settings to full screen.
+		ChangeDisplaySettings(&dmScreenSettings, CDS_FULLSCREEN);
+
+		// Set the position of the window to the top left corner.
+		posX = posY = 0;
+	}
+	else
+	{
+		// If windowed then set it to 800x600 resolution.
+		screenWidth = 800;
+		screenHeight = 600;
+
+		// Place the window in the middle of the screen.
+		posX = (GetSystemMetrics(SM_CXSCREEN) - screenWidth) / 2;
+		posY = (GetSystemMetrics(SM_CYSCREEN) - screenHeight) / 2;
+	}
+
+	// Create the window with the screen settings and get the handle to it.
+	m_hwnd = CreateWindowEx(WS_EX_APPWINDOW, m_applicationName, m_applicationName,
+		WS_CLIPSIBLINGS | WS_CLIPCHILDREN | WS_POPUP,
+		posX, posY, screenWidth, screenHeight, NULL, NULL, m_hinstance, NULL);
+
+	// Bring the window up on the screen and set it as main focus.
+	ShowWindow(m_hwnd, SW_SHOW);
+	SetForegroundWindow(m_hwnd);
+	SetFocus(m_hwnd);
+
+	// Hide the mouse cursor.
+	ShowCursor(false);
+
+	return;
+}
+
+void SystemClass::ShutdownWindows()
+{
+	// Show the mouse cursor.
+	ShowCursor(true);
+
+	// Fix the display settings if leaving full screen mode.
+	if (FULL_SCREEN)
+	{
+		ChangeDisplaySettings(NULL, 0);
+	}
+
+	// Remove the window.
+	DestroyWindow(m_hwnd);
+	m_hwnd = NULL;
+
+	// Remove the application instance.
+	UnregisterClass(m_applicationName, m_hinstance);
+	m_hinstance = NULL;
+
+	// Release the pointer to this class.
+	ApplicationHandle = NULL;
+
+	return;
+}
+
+LRESULT CALLBACK WndProc(HWND hwnd, UINT umessage, WPARAM wparam, LPARAM lparam)
+{
+	switch (umessage)
+	{
+		// Check if the window is being destroyed.
+	case WM_DESTROY:
+	{
+		PostQuitMessage(0);
+		return 0;
+	}
+
+	// Check if the window is being closed.
+	case WM_CLOSE:
+	{
+		PostQuitMessage(0);
+		return 0;
+	}
+
+	// All other messages pass to the message handler in the system class.
+	default:
+	{
+		return ApplicationHandle->MessageHandler(hwnd, umessage, wparam, lparam);
+	}
+	}
+}