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MOUSDEMO.C
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C/C++ Source or Header
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1988-12-07
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4KB
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113 lines
/*-----------------------------------------------------
MOUSDEMO.C -- Demonstrates mouse message processing
(c) 1988, Ziff Communications Co.
PC Magazine * Charles Petzold, 9/88
-----------------------------------------------------*/
#define INCL_WIN
#define INCL_GPI
#include <os2.h>
#include <stdio.h>
#define ID_TIMER 1
MRESULT EXPENTRY ClientWndProc (HWND, USHORT, MPARAM, MPARAM) ;
HAB hab ;
int main (void)
{
static CHAR szClientClass [] = "MousDemo" ;
HMQ hmq ;
HWND hwndFrame, hwndClient ;
QMSG qmsg ;
ULONG flFrameFlags = FCF_STANDARD & ~FCF_MENU ;
hab = WinInitialize (0) ;
hmq = WinCreateMsgQueue (hab, 0) ;
WinRegisterClass (hab, szClientClass, ClientWndProc, CS_SIZEREDRAW, 0) ;
hwndFrame = WinCreateStdWindow (HWND_DESKTOP, WS_VISIBLE,
&flFrameFlags, szClientClass,
"Mouse Demo",
0L, NULL, 0, &hwndClient) ;
while (WinGetMsg (hab, &qmsg, NULL, 0, 0))
WinDispatchMsg (hab, &qmsg) ;
WinDestroyWindow (hwndFrame) ;
WinDestroyMsgQueue (hmq) ;
WinTerminate (hab) ;
return 0 ;
}
VOID PaintWindow (HWND hwnd, HPS hps, SHORT xPointer, SHORT yPointer)
{
static CHAR szBuffer [40] ;
RECTL rcl ;
sprintf (szBuffer, " Pointer Position = (%d, %d) ",
xPointer, yPointer) ;
WinQueryWindowRect (hwnd, &rcl) ;
GpiSetBackMix (hps, BM_OVERPAINT) ;
WinDrawText (hps, -1, szBuffer, &rcl, CLR_NEUTRAL, CLR_BACKGROUND,
DT_CENTER | DT_VCENTER) ;
}
MRESULT EXPENTRY ClientWndProc (HWND hwnd, USHORT msg, MPARAM mp1, MPARAM mp2)
{
static SHORT xPointer, yPointer ;
HPS hps;
POINTL ptl ;
switch (msg)
{
case WM_CREATE:
WinStartTimer (hab, hwnd, ID_TIMER, 1000) ;
return 0 ;
case WM_TIMER:
WinQueryPointerPos (HWND_DESKTOP, &ptl) ;
WinMapWindowPoints (HWND_DESKTOP, hwnd, &ptl, 1) ;
xPointer = (SHORT) ptl.x ;
yPointer = (SHORT) ptl.y ;
hps = WinGetPS (hwnd) ;
PaintWindow (hwnd, hps, xPointer, yPointer) ;
WinReleasePS (hps) ;
return 0 ;
case WM_MOUSEMOVE:
xPointer = MOUSEMSG(&msg)->x ;
yPointer = MOUSEMSG(&msg)->y ;
hps = WinGetPS (hwnd) ;
PaintWindow (hwnd, hps, xPointer, yPointer) ;
WinReleasePS (hps) ;
break ;
case WM_BUTTON1DOWN:
DosBeep (256, 100) ;
break ;
case WM_BUTTON1UP:
DosBeep (512, 100) ;
return 0 ;
case WM_BUTTON1DBLCLK:
DosBeep (1024, 100) ;
return 0 ;
case WM_PAINT:
hps = WinBeginPaint (hwnd, NULL, NULL) ;
GpiErase (hps) ;
PaintWindow (hwnd, hps, xPointer, yPointer) ;
WinEndPaint (hps) ;
return 0 ;
case WM_DESTROY:
WinStopTimer (hab, hwnd, ID_TIMER) ;
return 0 ;
}
return WinDefWindowProc (hwnd, msg, mp1, mp2) ;
}