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- /*-------------------------
- RULER.C -- Draw a Ruler
- -------------------------*/
-
- #define INCL_WIN
- #define INCL_GPI
- #include <os2.h>
- #include <stdio.h>
-
- MRESULT EXPENTRY ClientWndProc (HWND, USHORT, MPARAM, MPARAM) ;
-
- int main (void)
- {
- static CHAR szClientClass [] = "Ruler" ;
- static ULONG flFrameFlags = FCF_TITLEBAR | FCF_SYSMENU |
- FCF_SIZEBORDER | FCF_MINMAX |
- FCF_SHELLPOSITION | FCF_TASKLIST ;
- HAB hab ;
- HMQ hmq ;
- HWND hwndFrame, hwndClient ;
- QMSG qmsg ;
-
- hab = WinInitialize (0) ;
- hmq = WinCreateMsgQueue (hab, 0) ;
-
- WinRegisterClass (hab, szClientClass, ClientWndProc, CS_SIZEREDRAW, 0) ;
-
- hwndFrame = WinCreateStdWindow (HWND_DESKTOP, WS_VISIBLE,
- &flFrameFlags, szClientClass, NULL,
- 0L, NULL, 0, &hwndClient) ;
-
- WinSendMsg (hwndFrame, WM_SETICON,
- WinQuerySysPointer (HWND_DESKTOP, SPTR_APPICON, FALSE),
- NULL) ;
-
- while (WinGetMsg (hab, &qmsg, NULL, 0, 0))
- WinDispatchMsg (hab, &qmsg) ;
-
- WinDestroyWindow (hwndFrame) ;
- WinDestroyMsgQueue (hmq) ;
- WinTerminate (hab) ;
- return 0 ;
- }
-
- MRESULT EXPENTRY ClientWndProc (HWND hwnd, USHORT msg, MPARAM mp1, MPARAM mp2)
- {
- static SHORT sTick[16] = { 100, 25, 35, 25, 50, 25, 35, 25,
- 70, 25, 35, 25, 50, 25, 35, 25 } ;
- static SHORT cxClient, cyClient, cxChar, cyChar, cyDesc ;
- static SIZEL sizl ;
- CHAR szBuffer [4] ;
- FONTMETRICS fm ;
- HPS hps ;
- POINTL ptl ;
- SHORT sIndex ;
-
- switch (msg)
- {
- case WM_CREATE:
- hps = WinGetPS (hwnd) ;
- GpiSetPS (hps, &sizl, PU_LOENGLISH) ;
-
- GpiQueryFontMetrics (hps, (LONG) sizeof fm, &fm) ;
- cxChar = (SHORT) fm.lAveCharWidth ;
- cyChar = (SHORT) fm.lMaxBaselineExt ;
- cyDesc = (SHORT) fm.lMaxDescender ;
-
- WinReleasePS (hps) ;
- return 0 ;
-
- case WM_SIZE:
- ptl.x = SHORT1FROMMP (mp2) ;
- ptl.y = SHORT2FROMMP (mp2) ;
-
- hps = WinGetPS (hwnd) ;
- GpiSetPS (hps, &sizl, PU_LOENGLISH) ;
- GpiConvert (hps, CVTC_DEVICE, CVTC_PAGE, 1L, &ptl) ;
- WinReleasePS (hps) ;
-
- cxClient = (SHORT) ptl.x ;
- cyClient = (SHORT) ptl.y ;
- return 0 ;
-
- case WM_PAINT:
- hps = WinBeginPaint (hwnd, NULL, NULL) ;
- GpiSetPS (hps, &sizl, PU_LOENGLISH) ;
- GpiErase (hps) ;
-
- for (sIndex = 0 ; sIndex < 16 * (SHORT) cxClient / 100 ;
- sIndex ++)
- {
- ptl.x = 100 * sIndex / 16 ;
- ptl.y = 0 ;
- GpiMove (hps, &ptl) ;
-
- ptl.y = sTick [sIndex % 16] ;
- GpiLine (hps, &ptl) ;
-
- if (sIndex % 16 == 0)
- {
- ptl.x -= cxChar / (sIndex > 160 ? 1 : 2) ;
- ptl.y += cyDesc ;
- GpiCharStringAt (hps, &ptl,
- (LONG) sprintf (szBuffer, "%d", sIndex / 16),
- szBuffer) ;
- }
- }
- WinEndPaint (hps) ;
- return 0 ;
- }
- return WinDefWindowProc (hwnd, msg, mp1, mp2) ;
- }
-