DIGCLOCK.docx

1、DIGCLOCK/*- DIGCLOCK.c - Digital Clock (c) Charles Petzold, 1998 -*/#include #define ID_TIMER 1LRESULT CALLBACK WndProc (HWND, UINT, WPARAM, LPARAM) ;int WINAPI WinMain (HINSTANCE hInstance, HINSTANCE hPrevInstance, PSTR szCmdLine, int iCmdShow) static TCHAR szAppName = TEXT (DigClock) ; HWND hwnd ;

2、 MSG msg ; WNDCLASS wndclass ; wndclass.style = CS_HREDRAW | CS_VREDRAW ; wndclass.lpfnWndProc = WndProc ; wndclass.cbClsExtra = 0 ; wndclass.cbWndExtra = 0 ; wndclass.hInstance = hInstance ; wndclass.hIcon = LoadIcon (NULL, IDI_APPLICATION) ; wndclass.hCursor = LoadCursor (NULL, IDC_ARROW) ; wndcla

3、ss.hbrBackground = (HBRUSH) GetStockObject (WHITE_BRUSH) ; wndclass.lpszMenuName = NULL ; wndclass.lpszClassName = szAppName ; if (!RegisterClass (&wndclass) MessageBox (NULL, TEXT (Program requires Windows NT!), szAppName, MB_ICONERROR) ; return 0 ; hwnd = CreateWindow (szAppName, TEXT (Digital Clo

4、ck), WS_OVERLAPPEDWINDOW, CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT, NULL, NULL, hInstance, NULL) ; ShowWindow (hwnd, iCmdShow) ; UpdateWindow (hwnd) ; while (GetMessage (&msg, NULL, 0, 0) TranslateMessage (&msg) ; DispatchMessage (&msg) ; return msg.wParam ; void DisplayDigit (HDC

5、hdc, int iNumber) static BOOL fSevenSegment 107 = 1, 1, 1, 0, 1, 1, 1, / 0 0, 0, 1, 0, 0, 1, 0, / 1 1, 0, 1, 1, 1, 0, 1, / 2 1, 0, 1, 1, 0, 1, 1, / 3 0, 1, 1, 1, 0, 1, 0, / 4 1, 1, 0, 1, 0, 1, 1, / 5 1, 1, 0, 1, 1, 1, 1, / 6 1, 0, 1, 0, 0, 1, 0, / 7 1, 1, 1, 1, 1, 1, 1, / 8 1, 1, 1, 1, 0, 1, 1 ; / 9

6、 static POINT ptSegment 76 = 7, 6, 11, 2, 31, 2, 35, 6, 31, 10, 11, 10, 6, 7, 10, 11, 10, 31, 6, 35, 2, 31, 2, 11, 36, 7, 40, 11, 40, 31, 36, 35, 32, 31, 32, 11, 7, 36, 11, 32, 31, 32, 35, 36, 31, 40, 11, 40, 6, 37, 10, 41, 10, 61, 6, 65, 2, 61, 2, 41, 36, 37, 40, 41, 40, 61, 36, 65, 32, 61, 32, 41,

7、 7, 66, 11, 62, 31, 62, 35, 66, 31, 70, 11, 70 ; int iSeg ; for (iSeg = 0 ; iSeg 7 ; iSeg+) if (fSevenSegment iNumberiSeg) Polygon (hdc, ptSegment iSeg, 6) ;void DisplayTwoDigits (HDC hdc, int iNumber, BOOL fSuppress) if (!fSuppress | (iNumber / 10 != 0) DisplayDigit (hdc, iNumber / 10) ; OffsetWind

8、owOrgEx (hdc, -42, 0, NULL) ; DisplayDigit (hdc, iNumber % 10) ; OffsetWindowOrgEx (hdc, -42, 0, NULL) ;void DisplayColon (HDC hdc) POINT ptColon 24 = 2, 21, 6, 17, 10, 21, 6, 25, 2, 51, 6, 47, 10, 51, 6, 55 ; Polygon (hdc, ptColon 0, 4) ; Polygon (hdc, ptColon 1, 4) ; OffsetWindowOrgEx (hdc, -12, 0

9、, NULL) ;void DisplayTime (HDC hdc, BOOL f24Hour, BOOL fSuppress) SYSTEMTIME st ; GetLocalTime (&st) ; if (f24Hour) DisplayTwoDigits (hdc, st.wHour, fSuppress) ; else DisplayTwoDigits (hdc, (st.wHour %= 12) ? st.wHour : 12, fSuppress) ; DisplayColon (hdc) ; DisplayTwoDigits (hdc, st.wMinute, FALSE)

10、; DisplayColon (hdc) ; DisplayTwoDigits (hdc, st.wSecond, FALSE) ;LRESULT CALLBACK WndProc (HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam) static BOOL f24Hour, fSuppress ; static HBRUSH hBrushRed ; static int cxClient, cyClient ; HDC hdc ; PAINTSTRUCT ps ; TCHAR szBuffer 2 ; switch (message)

11、 case WM_CREATE: hBrushRed = CreateSolidBrush (RGB (255, 0, 0) ; SetTimer (hwnd, ID_TIMER, 1000, NULL) ; / fall through case WM_SETTINGCHANGE: GetLocaleInfo (LOCALE_USER_DEFAULT, LOCALE_ITIME, szBuffer, 2) ; f24Hour = (szBuffer0 = 1) ; GetLocaleInfo (LOCALE_USER_DEFAULT, LOCALE_ITLZERO, szBuffer, 2)

12、 ; fSuppress = (szBuffer0 = 0) ; InvalidateRect (hwnd, NULL, TRUE) ; return 0 ; case WM_SIZE: cxClient = LOWORD (lParam) ; cyClient = HIWORD (lParam) ; return 0 ; case WM_TIMER: InvalidateRect (hwnd, NULL, TRUE) ; return 0 ; case WM_PAINT: hdc = BeginPaint (hwnd, &ps) ; SetMapMode (hdc, MM_ISOTROPIC

13、) ; SetWindowExtEx (hdc, 276, 72, NULL) ; SetViewportExtEx (hdc, cxClient, cyClient, NULL) ; SetWindowOrgEx (hdc, 138, 36, NULL) ; SetViewportOrgEx (hdc, cxClient / 2, cyClient / 2, NULL) ; SelectObject (hdc, GetStockObject (NULL_PEN) ; SelectObject (hdc, hBrushRed) ; DisplayTime (hdc, f24Hour, fSuppress) ; EndPaint (hwnd, &ps) ; return 0 ; case WM_DESTROY: KillTimer (hwnd, ID_TIMER) ; DeleteObject (hBrushRed) ; PostQuitMessage (0) ; return 0 ; return DefWindowProc (hwnd, message, wParam, lParam) ;