1 // HelloWorldGame.cpp : Defines the entry point for the application.
  2 //
  3 
  4 #include "stdafx.h"
  5 #include "HelloWorldGame.h"
  6 
  7 #define MAX_LOADSTRING 100
  8 
  9 // Global Variables:
 10 HINSTANCE hInst;                                // current instance
 11 TCHAR szTitle[MAX_LOADSTRING];                    // The title bar text
 12 TCHAR szWindowClass[MAX_LOADSTRING];            // the main window class name
 13 
 14 //
 15 int r = 125;
 16 int g = 125;
 17 int b = 125;
 18 COLORREF color = RGB(r, g, b);
 19 WCHAR infor[64];
 20 int x = 200, y = 150;
 21 //
 22 // Forward declarations of functions included in this code module:
 23 ATOM                MyRegisterClass(HINSTANCE hInstance);
 24 BOOL                InitInstance(HINSTANCE, int);
 25 LRESULT CALLBACK    WndProc(HWND, UINT, WPARAM, LPARAM);
 26 INT_PTR CALLBACK    About(HWND, UINT, WPARAM, LPARAM);
 27 
 28 int APIENTRY _tWinMain(_In_ HINSTANCE hInstance,
 29     _In_opt_ HINSTANCE hPrevInstance,
 30     _In_ LPTSTR    lpCmdLine,
 31     _In_ int       nCmdShow)
 32 {
 33     UNREFERENCED_PARAMETER(hPrevInstance);
 34     UNREFERENCED_PARAMETER(lpCmdLine);
 35 
 36     // TODO: Place code here.
 37     MSG msg;
 38     HACCEL hAccelTable;
 39 
 40     // Initialize global strings
 41     LoadString(hInstance, IDS_APP_TITLE, szTitle, MAX_LOADSTRING);
 42     LoadString(hInstance, IDC_HELLOWORLDGAME, szWindowClass, MAX_LOADSTRING);
 43     MyRegisterClass(hInstance);
 44 
 45     // Perform application initialization:
 46     if (!InitInstance(hInstance, nCmdShow))
 47     {
 48         return FALSE;
 49     }
 50 
 51     hAccelTable = LoadAccelerators(hInstance, MAKEINTRESOURCE(IDC_HELLOWORLDGAME));
 52 
 53     // Main message loop:
 54     while (GetMessage(&msg, NULL, 0, 0))
 55     {
 56         if (!TranslateAccelerator(msg.hwnd, hAccelTable, &msg))
 57         {
 58             TranslateMessage(&msg);
 59             DispatchMessage(&msg);
 60         }
 61     }
 62 
 63     return (int)msg.wParam;
 64 }
 65 
 66 
 67 
 68 //
 69 //  FUNCTION: MyRegisterClass()
 70 //
 71 //  PURPOSE: Registers the window class.
 72 //
 73 ATOM MyRegisterClass(HINSTANCE hInstance)
 74 {
 75     WNDCLASSEX wcex;
 76 
 77     wcex.cbSize = sizeof(WNDCLASSEX);
 78 
 79     wcex.style = CS_HREDRAW | CS_VREDRAW;
 80     wcex.lpfnWndProc = WndProc;
 81     wcex.cbClsExtra = 0;
 82     wcex.cbWndExtra = 0;
 83     wcex.hInstance = hInstance;
 84     wcex.hIcon = LoadIcon(hInstance, MAKEINTRESOURCE(IDI_HELLOWORLDGAME));
 85     wcex.hCursor = LoadCursor(NULL, IDC_ARROW);
 86     wcex.hbrBackground = (HBRUSH)(COLOR_WINDOW + 1);
 87     wcex.lpszMenuName = MAKEINTRESOURCE(IDC_HELLOWORLDGAME);
 88     wcex.lpszClassName = szWindowClass;
 89     wcex.hIconSm = LoadIcon(wcex.hInstance, MAKEINTRESOURCE(IDI_SMALL));
 90 
 91     return RegisterClassEx(&wcex);
 92 }
 93 
 94 //
 95 //   FUNCTION: InitInstance(HINSTANCE, int)
 96 //
 97 //   PURPOSE: Saves instance handle and creates main window
 98 //
 99 //   COMMENTS:
100 //
101 //        In this function, we save the instance handle in a global variable and
102 //        create and display the main program window.
103 //
104 BOOL InitInstance(HINSTANCE hInstance, int nCmdShow)
105 {
106     HWND hWnd;
107 
108     hInst = hInstance; // Store instance handle in our global variable
109 
110     hWnd = CreateWindow(szWindowClass, szTitle, WS_OVERLAPPEDWINDOW,
111         CW_USEDEFAULT, 0, CW_USEDEFAULT, 0, NULL, NULL, hInstance, NULL);
112 
113     if (!hWnd)
114     {
115         return FALSE;
116     }
117 
118     ShowWindow(hWnd, nCmdShow);
119     UpdateWindow(hWnd);
120 
121     return TRUE;
122 }
123 
124 //
125 //  FUNCTION: WndProc(HWND, UINT, WPARAM, LPARAM)
126 //
127 //  PURPOSE:  Processes messages for the main window.
128 //
129 //  WM_COMMAND    - process the application menu
130 //  WM_PAINT    - Paint the main window
131 //  WM_DESTROY    - post a quit message and return
132 //
133 //
134 LRESULT CALLBACK WndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)
135 {
136     int wmId, wmEvent;
137     PAINTSTRUCT ps;
138     HDC hdc;
139 
140     switch (message)
141     {
142     case WM_COMMAND:
143         wmId = LOWORD(wParam);
144         wmEvent = HIWORD(wParam);
145         // Parse the menu selections:
146         switch (wmId)
147         {
148         case IDM_ABOUT:
149             DialogBox(hInst, MAKEINTRESOURCE(IDD_ABOUTBOX), hWnd, About);
150             break;
151         case IDM_EXIT:
152             DestroyWindow(hWnd);
153             break;
154         default:
155             return DefWindowProc(hWnd, message, wParam, lParam);
156         }
157         break;
158     case WM_LBUTTONDOWN://鼠标左击消息
159         color = RGB(255, 0, 0);
160         InvalidateRect(hWnd, NULL, TRUE);
161         break;
162     case WM_RBUTTONDOWN://鼠标右击消息
163         color = RGB(0, 0, 255);
164         InvalidateRect(hWnd, NULL, TRUE);
165         break;
166     case WM_MOUSEMOVE:
167         x = LOWORD(lParam);//得到x坐标
168         y = HIWORD(lParam);//得到y坐标
169         InvalidateRect(hWnd, NULL, TRUE);//发出重绘消息
170         break;
171     case WM_MOUSEWHEEL:
172     {
173         //得到鼠标滚轮的参数
174         int zDelta = (short)HIWORD(wParam);
175         if (zDelta > 0) //正值向前
176         {
177             if (g<255)
178                 g += 1;
179 
180         }
181         else //负值向后
182         {
183             if (g>0)
184                 g--;
185         }
186         color = RGB(0, g, 122);
187         InvalidateRect(hWnd, NULL, TRUE);
188     }
189         break;
190     
191     case WM_PAINT:
192         hdc = BeginPaint(hWnd, &ps);
193         // TODO: Add any drawing code here...
194         SetTextColor(hdc, color);
195         TextOut(hdc, x, y, L"Hello World!", 12);
196         swprintf_s(infor, L"r:%d,g:%d,b:%d\nx=%d,y=%d",r,g,b, x, y);//格式化字符串
197         TextOut(hdc, x, y - 100, infor, wcslen(infor));
198         EndPaint(hWnd, &ps);
199         break;
200     case WM_DESTROY:
201         PostQuitMessage(0);
202         break;
203     default:
204         return DefWindowProc(hWnd, message, wParam, lParam);
205     }
206     return 0;
207 }
208 
209 // Message handler for about box.
210 INT_PTR CALLBACK About(HWND hDlg, UINT message, WPARAM wParam, LPARAM lParam)
211 {
212     UNREFERENCED_PARAMETER(lParam);
213     switch (message)
214     {
215     case WM_INITDIALOG:
216         return (INT_PTR)TRUE;
217 
218     case WM_COMMAND:
219         if (LOWORD(wParam) == IDOK || LOWORD(wParam) == IDCANCEL)
220         {
221             EndDialog(hDlg, LOWORD(wParam));
222             return (INT_PTR)TRUE;
223         }
224         break;
225     }
226     return (INT_PTR)FALSE;
227 }