Add Music fluctuations project and Chinese plan docs

MVS/Music fluctuations/source/window/Window.cpp

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+#include"Window.h"
+//app单例
+Window* Window::currentWindow = nullptr;
+
+Window::Window(Input& p_input):m_input(p_input) 
+{
+	//ShowCursor(false);
+}
+Window::~Window() {}
+
+
+//带注册的事件回调（必须是静态函数）
+LRESULT CALLBACK Wndproc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)
+{
+	Window::currentWindow->handleMessage(hWnd, message, wParam, lParam);
+	return(DefWindowProc(hWnd, message, wParam, lParam));
+}
+
+
+bool Window::initWindow(HINSTANCE hInstance, const uint32_t& width, const uint32_t& height) {
+	currentWindow = this;
+	mWidth = width;
+	mHeight = height;
+
+	//初始化窗体类型，并且注册
+	registerWindowClass(hInstance);
+
+	//生成一个窗体，并且显示
+	if (!createWindow(hInstance)) {
+		return false;
+	}
+
+	//初始化画布
+	/*
+	* DC：Device Context 设备上下文描述对象
+	* 每个窗口都有自己对应的设备区域映射，即mhDC
+	* 这里创建一个与本窗口兼容的DC，mCanvasDC
+	* 可以从mCanvasDC向mhDC拷贝绘图数据内容
+	*/
+	mhDC = GetDC(mHwnd);
+	mCanvasDC = CreateCompatibleDC(mhDC);
+
+	BITMAPINFO  bmpInfo{};
+	bmpInfo.bmiHeader.biSize = sizeof(BITMAPINFOHEADER);
+	bmpInfo.bmiHeader.biWidth = mWidth;
+	bmpInfo.bmiHeader.biHeight = mHeight;
+	bmpInfo.bmiHeader.biPlanes = 1;
+	bmpInfo.bmiHeader.biBitCount = 32;
+	bmpInfo.bmiHeader.biCompression = BI_RGB; //实际上存储方式为bgra
+
+	//创建与mhMem兼容的位图,其实实在mhMem指代的设备上划拨了一块内存，让mCanvasBuffer指向它
+	mhBmp = CreateDIBSection(mCanvasDC, &bmpInfo, DIB_RGB_COLORS, (void**)&mCanvasBuffer, 0, 0);//在这里创建buffer的内存
+
+	//一个设备可以创建多个位图，本设备使用mhBmp作为激活位图，对mCanvasDC的内存拷出，其实就是拷出了mhBmp的数据
+	SelectObject(mCanvasDC, mhBmp);
+
+	memset(mCanvasBuffer, 0, mWidth * mHeight * 4); //清空buffer为0
+
+	return true;
+}
+
+ATOM Window::registerWindowClass(HINSTANCE hInstance)
+{
+	WNDCLASSEXW wndClass;
+
+	wndClass.cbSize = sizeof(WNDCLASSEX);
+	wndClass.style = CS_HREDRAW | CS_VREDRAW;	//水平/垂直大小发生变化重绘窗口
+	wndClass.lpfnWndProc = Wndproc;
+	wndClass.cbClsExtra = 0;
+	wndClass.cbWndExtra = 0;
+	wndClass.hInstance = hInstance;		//应用程序句柄
+	wndClass.hIcon = LoadIcon(NULL, IDI_APPLICATION);//应用程序图标,即任务栏的大图标
+	wndClass.hCursor = LoadCursor(NULL, IDC_ARROW);//鼠标图标
+	wndClass.hbrBackground = (HBRUSH)GetStockObject(BLACK_BRUSH);//窗口背景色
+	wndClass.lpszMenuName = NULL;
+	wndClass.lpszClassName = mWindowClassName;//窗口类名
+	wndClass.hIconSm = LoadIcon(NULL, IDI_WINLOGO);//窗口标题图标
+
+	return RegisterClassExW(&wndClass);
+}
+
+BOOL Window::createWindow(HINSTANCE hInstance)
+{
+	mWindowInst = hInstance;
+
+	/*
+	* WS_POPUP:不需要标题栏，则不需要边框
+	* WS_OVERLAPPEDWINDOW：拥有普通程序主窗口的所有特点，必须有标题且有边框
+	*
+	* WS_CLIPSIBLINGS:被兄弟窗口挡住区域不绘制
+	* WS_CLIPCHILDREN:被子窗口遮挡住的区域不绘制
+	*/
+
+	auto dwExStyle = WS_EX_APPWINDOW;
+	auto dwStyle = WS_OVERLAPPEDWINDOW | WS_CLIPSIBLINGS | WS_CLIPCHILDREN;
+
+	//由于存在标题栏等，所以需要计算中间显示区域的大小,比如PopUp的窗体，就没有标题栏，则不会改变
+	RECT windowRect;
+	windowRect.left = 0L;
+	windowRect.top = 0L;
+	windowRect.right = (long)mWidth;
+	windowRect.bottom = (long)mHeight;
+	AdjustWindowRectEx(&windowRect, dwStyle, FALSE, dwExStyle);
+
+	mHwnd = CreateWindowW(
+		mWindowClassName,
+		(LPCWSTR)"doom",	//窗体标题
+		dwStyle,
+		400,//x位置，相对左上角
+		200,//y位置，相对左上角
+		windowRect.right - windowRect.left,
+		windowRect.bottom - windowRect.top,
+		nullptr,//父窗体
+		nullptr,//菜单栏
+		hInstance,//程序实例
+		nullptr);//额外参数
+
+
+	if (!mHwnd)
+	{
+		return FALSE;
+	}
+
+	ShowWindow(mHwnd, true);
+	UpdateWindow(mHwnd);
+
+	return TRUE;
+}
+
+void Window::peekMessage() {
+	MSG msg;
+	if (PeekMessage(&msg, NULL, 0, 0, PM_REMOVE))
+	{
+		TranslateMessage(&msg);
+		DispatchMessage(&msg);
+	}
+}
+
+void Window::handleMessage(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam) {
+	switch (message)
+	{
+		case WM_CLOSE: 
+		{
+			DestroyWindow(hWnd);//此处销毁窗体,会自动发出WM_DESTROY
+			break;
+		}
+		case WM_PAINT:
+		{
+			PAINTSTRUCT ps;
+			HDC hdc = BeginPaint(hWnd, &ps);
+			EndPaint(hWnd, &ps);
+			break;
+		}
+		case WM_DESTROY: 
+		{
+			PostQuitMessage(0);//发出线程终止请求
+			mAlive = false;
+			break;
+		}
+		/*case WM_SIZING:
+		{
+			int newWidth = LOWORD(lParam);
+			int newHeight = HIWORD(lParam);
+			std::cout<<newWidth<<"  "<<newHeight<<std::endl;
+		}*/
+		default:
+		{
+			m_input.HandelInput(hWnd, message, wParam, lParam);
+			break;
+		}
+	}
+}
+
+void Window::swapBuffer() {
+	BitBlt(mhDC, 0, 0, mWidth, mHeight, mCanvasDC, 0, 0, SRCCOPY);
+}