1 #define _CRT_SECURE_NO_WARNINGS
2
3 #include <windows.h>
4
5 #include <math.h>
6
7 #include <time.h>
8
9 #pragma comment(lib, "user32.lib")
10
11 #pragma comment(lib, "gdi32.lib")
12
13 #pragma comment(linker, "/SUBSYSTEM:Windows")
14
15
16
17 void GetPos(double degree, int len, int* x, int* y)
18
19 {
20
21 *x = len * sin(degree);
22
23 *y = len * cos(degree);
24
25 }
26
27
28
29 void DrawClock(HWND hw, HDC h, int hour, int minute, int second)
30
31 {
32
33 HDC bufdc = CreateCompatibleDC(h);
34
35 HBITMAP buf = CreateCompatibleBitmap(bufdc, 200, 200);
36
37 RECT cr;
38
39 /* 创建一个白色的画刷 */
40 HBRUSH bBg = CreateSolidBrush(RGB(255, 255, 255));
41
42 GetClientRect(hw, &cr);
43
44 SelectObject(bufdc, bBg);
45
46 SelectObject(bufdc, buf);
47
48 FillRect(bufdc, &cr, bBg);
49
50
51
52 {
53
54 int sx, sy, ex, ey;
55
56 int i;
57 /* 这里应该是标记出表上的12个时间点 每个标记是一个小短线*/
58 for(i = 0; i < 12; ++i) {
59
60 GetPos(2*3.14159/12*i, 85, &sx, &sy);
61
62 GetPos(2*3.14159/12*i, 95, &ex, &ey);
63
64 MoveToEx(bufdc, 100+sx, 100-sy, 0);
65
66 LineTo(bufdc, 100+ex, 100-ey);
67
68 }
69
70 }
71
72
73 /* 画出时针 分针 秒针 */
74 {
75
76 int hx, hy, mx, my, sx, sy;
77
78 GetPos(2*3.14159 / 12 * (hour + (double)minute / 60 + (double)second / 3600), 50, &hx, &hy);
79
80 GetPos(2*3.14159 / 60 * (minute + (double)second / 60), 65, &mx, &my);
81
82 GetPos(2*3.14159 / 60 * second, 80, &sx, &sy);
83
84 MoveToEx(bufdc, 100, 100, NULL);
85
86 LineTo(bufdc, 100+hx, 100-hy);
87
88 MoveToEx(bufdc, 100, 100, NULL);
89
90 LineTo(bufdc, 100+mx, 100-my);
91
92 MoveToEx(bufdc, 100, 100, NULL);
93
94 LineTo(bufdc, 100+sx, 100-sy);
95
96 }
97
98
99
100 BitBlt(h, 0, 0, 200, 200, bufdc, 0, 0, SRCCOPY);
101
102 /* 释放分配的资源 */
103 DeleteDC(bufdc);
104
105 DeleteObject(bBg);
106
107 DeleteObject(buf);
108
109 }
110
111
112
113 LRESULT CALLBACK WndProc(HWND h, UINT m, WPARAM w, LPARAM l)
114
115 {
116
117 switch(m) {
118
119 case WM_CREATE:
120
121 SetTimer(h, 1, 1000, 0); /* 设置时间间隔 每一秒作为一个时间间隔 */
122
123 return 0;
124
125 case WM_ERASEBKGND:
126
127 return 1;
128
129 case WM_TIMER:
130
131 InvalidateRect(h, 0, FALSE);
132
133 return 0;
134
135 case WM_PAINT: {
136
137 PAINTSTRUCT ps;
138
139 HDC dc = BeginPaint(h, &ps);
140
141 {
142
143 time_t t;
144
145 struct tm* pst;
146
147 time(&t);
148
149 pst = localtime(&t);
150 /* 调用上面定义的函数 描绘出当前时钟 */
151 DrawClock(h, dc, pst->tm_hour, pst->tm_min, pst->tm_sec);
152
153 }
154
155 EndPaint(h, &ps);
156
157 return 0;
158
159 }
160
161 case WM_DESTROY:
162
163 KillTimer(h, 1); /* 杀死定时器 */
164
165 PostQuitMessage(0);
166
167 return 0;
168
169 default:
170
171 return DefWindowProc(h, m, w, l);
172
173 }
174
175 }
176
177
178
179 int APIENTRY WinMain(HINSTANCE hInst, HINSTANCE hPrev, LPSTR szCmd, INT nShow)
180
181 {
182
183 WNDCLASS wc;
184
185 ZeroMemory(&wc, sizeof(wc));
186
187 wc.style = CS_HREDRAW | CS_VREDRAW;
188
189 wc.lpfnWndProc = WndProc;
190
191 wc.hInstance = hInst;
192
193 wc.hbrBackground = (HBRUSH) COLOR_WINDOW;
194
195 wc.lpszClassName = TEXT("MYCLOCK");
196
197
198
199 if (RegisterClass(&wc) != 0) {
200
201 MSG m;
202
203 /* 创建窗口 */
204 HWND hw = CreateWindow(TEXT("MYCLOCK"), TEXT("Clock"), WS_OVERLAPPEDWINDOW,
205
206 CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT, NULL, NULL, hInst, 0);
207
208
209
210 if (hw != NULL) {
211
212 RECT r;
213
214 GetWindowRect(hw, &r);
215
216 r.right = r.left + 200;
217
218 r.bottom = r.top + 200;
219
220 AdjustWindowRect(&r, WS_OVERLAPPEDWINDOW, FALSE);
221
222 MoveWindow(hw, r.left, r.top, r.right - r.left, r.bottom - r.top, FALSE);
223
224 ShowWindow(hw, SW_SHOWNORMAL); /* 将窗口显示出来 */
225
226 UpdateWindow(hw);
227
228
229
230 while( GetMessage(&m, 0, 0, 0) > 0) {
231
232 TranslateMessage(&m);
233
234 DispatchMessage(&m);
235
236 }
237
238 return 0;
239
240 }
241
242 return 1;
243
244 } else
245
246 return 1;
247 }
