我们把上一个教程的代码封装到一个类中来方便以后的使用。
首先新建一个空工程叫做MyHelloWin，添加一个main.cpp文件，然后新建一个类叫做MyWindow,将于窗体有关的操作封装到里面
MyWindow.h文件
1 /************************************************************************
2 Directx11学习笔记【2】 将HelloWin封装成类
3 2016.01 by zhangbaochong
4 /************************************************************************/
5 #pragma once
6 #include <windows.h>
7
8 static bool isPushEsc = false;//是否按下Esc键
9
10 class MyWindow
11 {
12 public:
13 MyWindow();
14 ~MyWindow();
15 public:
16 HWND GetHandle();//返回窗口句柄
17 bool Create(int &width, int &height);//创建窗口
18 void Run();//处理消息循环
19 LRESULT CALLBACK MessageHandler(HWND hwnd, UINT message, WPARAM wparam, LPARAM lparam);//消息处理
20 private:
21 HWND m_hwnd;
22 HINSTANCE m_hinstance;
23 LPCWSTR m_name;
24 };
MyWindow.cpp
因为定义窗口的时候必须指定一个回调函数，所以我们定义一个静态的WndProc，因为在WndProc中需要调用其他消息的处理函数MessageHandler，所以我们又定义一个类的实例句柄applicationHandle。
1 /************************************************************************
2 Directx11学习笔记【2】 将HelloWin封装成类
3 2016.01 by zhangbaochong
4 /************************************************************************/
5
6 #include "MyWindow.h"
7
8 static LRESULT CALLBACK WndProc(HWND hwnd, UINT message, WPARAM wparam, LPARAM lparam);//静态回调函数
9 static MyWindow *applicationHandle;//类的一个静态实例
10
11 MyWindow::MyWindow()
12 {
13 isPushEsc = false;
14 m_hwnd = NULL;
15 m_name = L"HelloWin";
16 }
17
18
19 MyWindow::~MyWindow()
20 {
21 }
22
23
24 HWND MyWindow::GetHandle()
25 {
26 return m_hwnd;
27 }
28
29 bool MyWindow::Create(int &width, int &height)
30 {
31 WNDCLASSEX wnd;
32 applicationHandle = this;
33 m_hinstance = GetModuleHandle(NULL);
34 wnd.cbClsExtra = 0;
35 wnd.cbSize = sizeof(WNDCLASSEX);
36 wnd.cbWndExtra = 0;
37 wnd.hbrBackground = (HBRUSH)GetStockObject(BLACK_BRUSH);
38 wnd.hCursor = LoadCursor(NULL, IDC_ARROW);
39 wnd.hIcon = LoadIcon(NULL, IDI_WINLOGO);
40 wnd.hIconSm = wnd.hIcon;
41 wnd.hInstance = m_hinstance;
42 wnd.lpfnWndProc = WndProc;
43 wnd.lpszClassName = m_name;
44 wnd.lpszMenuName = m_name;
45 wnd.style = CS_VREDRAW | CS_HREDRAW;
46
47 //注册窗口
48 if ( !RegisterClassEx(&wnd) )
49 {
50 MessageBox(NULL, L"注册窗口失败", L"error", 0);
51 return false;
52 }
53 m_hwnd = CreateWindowEx(WS_EX_APPWINDOW, m_name, m_name, WS_OVERLAPPEDWINDOW, 0, 0, width, height,
54 NULL, NULL, m_hinstance, NULL);
55 //显示窗口设置其为焦点
56 ShowWindow(m_hwnd, SW_SHOW);
57 UpdateWindow(m_hwnd);
58 return true;
59 }
60
61 static LRESULT CALLBACK WndProc(HWND hwnd, UINT message, WPARAM wparam, LPARAM lparam)
62 {
63 switch (message)
64 {
65 case WM_DESTROY:
66 PostQuitMessage(0);
67 return 0;
68 //其他消息发送MessageHandler处理
69 default:
70 return applicationHandle->MessageHandler(hwnd, message, wparam, lparam);
71 }
72 }
73
74 LRESULT CALLBACK MyWindow::MessageHandler(HWND hwnd, UINT message, WPARAM wparam, LPARAM lparam)
75 {
76 switch (message)
77 {
78 //检测按键消息
79 case WM_KEYDOWN:
80 if (wparam == VK_ESCAPE)//用户按下退出键
81 isPushEsc = true;
82 return 0;
83
84 //其他消息发送windows缺省处理
85 default:
86 return DefWindowProc(hwnd, message, wparam, lparam);
87 }
88 }
89
90 void MyWindow::Run()
91 {
92 MSG msg;
93 ZeroMemory(&msg, sizeof(MSG));
94 bool isRuning = true;//控制是否退出消息循环
95 while (isRuning)
96 {
97 //处理windows消息
98 if (PeekMessage(&msg, NULL, 0, 0, PM_REMOVE))
99 {
100 TranslateMessage(&msg);
101 DispatchMessage(&msg);
102 }
103 if (msg.message == WM_QUIT)
104 {
105 isRuning = false;
106 }
107 else//按下esc键也退出
108 {
109 isRuning = !isPushEsc;
110
111 //渲染等处理可以放在这儿
112 }
113
114 }
115 }
main.cpp
1 /************************************************************************
2 Directx11学习笔记【2】 将HelloWin封装成类
3 2016.01 by zhangbaochong
4 /************************************************************************/
5 #include "MyWindow.h"
6
7 int WinMain(_In_ HINSTANCE hInstance, _In_opt_ HINSTANCE hPrevInstance, _In_ LPSTR lpCmdLine, _In_ int nShowCmd)
8 {
9 int width = 800, height = 600;
10 MyWindow *window = new MyWindow;
11 if (window->Create(width, height))
12 {
13 window->Run();
14 }
15 return 0;
16 }
运行结果和上次一样：