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Annotation of pmsdk/samples/petzold/chap07/beeper1.c, revision 1.1.1.1

1.1       root        1: /*---------------------------------------
                      2:    BEEPER1.C -- Timer Demo Program No. 1
                      3:   ---------------------------------------*/
                      4: 
                      5: #define INCL_WIN
                      6: 
                      7: #include <os2.h>
                      8: #include <stddef.h>
                      9: 
                     10: #define ID_TIMER 1
                     11: 
                     12: MRESULT EXPENTRY ClientWndProc (HWND, USHORT, MPARAM, MPARAM) ;
                     13: 
                     14: int main (void)
                     15:      {
                     16:      static char szClientClass [] = "Beeper1" ;
                     17:      HAB         hab ;
                     18:      HMQ         hmq ;
                     19:      HWND        hwndClient, hwndFrame ;
                     20:      QMSG        qmsg ;
                     21:      ULONG       flFrameFlags = FCF_STANDARD & ~FCF_MENU ;
                     22:      ULONG       flFrameStyle = WS_VISIBLE ;
                     23: 
                     24:      hab = WinInitialize (0) ;
                     25:      hmq = WinCreateMsgQueue (hab, 0) ;
                     26: 
                     27:      WinRegisterClass (hab, szClientClass, ClientWndProc, CS_SIZEREDRAW, 0) ;
                     28: 
                     29:      hwndFrame = WinCreateStdWindow (HWND_DESKTOP, flFrameStyle,
                     30:                                      &flFrameFlags, szClientClass,
                     31:                                      "Timer Demo No. 1",
                     32:                                     0L, NULL, 0, &hwndClient) ;
                     33: 
                     34:      WinStartTimer (hab, hwndClient, ID_TIMER, 1000) ;
                     35: 
                     36:      while (WinGetMsg (hab, &qmsg, NULL, 0, 0))
                     37:           WinDispatchMsg (hab, &qmsg) ;
                     38: 
                     39:      WinStopTimer (hab, hwndClient, ID_TIMER) ;
                     40: 
                     41:      WinDestroyWindow (hwndFrame) ;
                     42:      WinDestroyMsgQueue (hmq) ;
                     43:      WinTerminate (hab) ;
                     44:      return 0 ;
                     45:      }
                     46: 
                     47: MRESULT EXPENTRY ClientWndProc (HWND hwnd, USHORT msg, MPARAM mp1, MPARAM mp2)
                     48:      {
                     49:      static BOOL fFlipFlop ;
                     50:      HPS         hps ;
                     51:      RECTL       rcl ;
                     52: 
                     53:      switch (msg)
                     54:           {
                     55:           case WM_TIMER:
                     56:                WinAlarm (HWND_DESKTOP, WA_NOTE) ;
                     57:                fFlipFlop = !fFlipFlop ;
                     58:                WinInvalidateRect (hwnd, NULL, FALSE) ;
                     59:                return 0 ;
                     60: 
                     61:           case WM_PAINT:
                     62:                hps = WinBeginPaint (hwnd, NULL, NULL) ;
                     63: 
                     64:                WinQueryWindowRect (hwnd, &rcl) ;
                     65:                WinFillRect (hps, &rcl, fFlipFlop ? CLR_BLUE : CLR_RED) ;
                     66: 
                     67:                WinEndPaint (hps) ;
                     68:                return 0 ;
                     69:           }
                     70:      return WinDefWindowProc (hwnd, msg, mp1, mp2) ;
                     71:      }

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