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1.1 root 1: /*--------------------------------------
2: WEB.C -- Mouse Movement Demo Program
3: --------------------------------------*/
4:
5: #define INCL_WIN
6: #define INCL_GPI
7: #include <os2.h>
8:
9: MRESULT EXPENTRY ClientWndProc (HWND, USHORT, MPARAM, MPARAM) ;
10:
11: int main (void)
12: {
13: static CHAR szClientClass [] = "Web" ;
14: static ULONG flFrameFlags = FCF_TITLEBAR | FCF_SYSMENU |
15: FCF_SIZEBORDER | FCF_MINMAX |
16: FCF_SHELLPOSITION | FCF_TASKLIST ;
17: HAB hab ;
18: HMQ hmq ;
19: HWND hwndFrame, hwndClient ;
20: QMSG qmsg ;
21:
22: hab = WinInitialize (0) ;
23: hmq = WinCreateMsgQueue (hab, 0) ;
24:
25: WinRegisterClass (hab, szClientClass, ClientWndProc,
26: CS_SIZEREDRAW | CS_SYNCPAINT, 0) ;
27:
28: hwndFrame = WinCreateStdWindow (HWND_DESKTOP, WS_VISIBLE,
29: &flFrameFlags, szClientClass, NULL,
30: 0L, NULL, 0, &hwndClient) ;
31:
32: WinSendMsg (hwndFrame, WM_SETICON,
33: WinQuerySysPointer (HWND_DESKTOP, SPTR_APPICON, FALSE),
34: NULL) ;
35:
36: while (WinGetMsg (hab, &qmsg, NULL, 0, 0))
37: WinDispatchMsg (hab, &qmsg) ;
38:
39: WinDestroyWindow (hwndFrame) ;
40: WinDestroyMsgQueue (hmq) ;
41: WinTerminate (hab) ;
42: return 0 ;
43: }
44:
45: VOID DrawWeb (HPS hps, POINTL *pptlPointerPos, POINTL *pptlClient)
46: {
47: POINTL ptl ;
48: // Lower Left --> Pointer --> Upper Right
49: ptl.x = 0 ;
50: ptl.y = 0 ;
51: GpiMove (hps, &ptl) ;
52: GpiLine (hps, pptlPointerPos) ;
53: GpiLine (hps, pptlClient) ;
54: // Upper Left --> Pointer --> Lower Right
55: ptl.x = 0 ;
56: ptl.y = pptlClient->y ;
57: GpiMove (hps, &ptl) ;
58: GpiLine (hps, pptlPointerPos) ;
59:
60: ptl.x = pptlClient->x ;
61: ptl.y = 0 ;
62: GpiLine (hps, &ptl) ;
63: // Lower Center --> Pointer --> Upper Center
64: ptl.x = pptlClient->x / 2 ;
65: ptl.y = 0 ;
66: GpiMove (hps, &ptl) ;
67: GpiLine (hps, pptlPointerPos) ;
68:
69: ptl.y = pptlClient->y ;
70: GpiLine (hps, &ptl) ;
71: // Left Center --> Pointer --> Right Center
72: ptl.x = 0 ;
73: ptl.y = pptlClient->y / 2 ;
74: GpiMove (hps, &ptl) ;
75: GpiLine (hps, pptlPointerPos) ;
76:
77: ptl.x = pptlClient->x ;
78: GpiLine (hps, &ptl) ;
79: }
80:
81: MRESULT EXPENTRY ClientWndProc (HWND hwnd, USHORT msg, MPARAM mp1, MPARAM mp2)
82: {
83: static POINTL ptlClient, ptlPointerPos ;
84: HPS hps ;
85:
86: switch (msg)
87: {
88: case WM_SIZE:
89: ptlClient.x = SHORT1FROMMP (mp2) ;
90: ptlClient.y = SHORT2FROMMP (mp2) ;
91: return 0 ;
92:
93: case WM_MOUSEMOVE:
94: hps = WinGetPS (hwnd) ;
95: GpiSetMix (hps, FM_INVERT) ;
96:
97: DrawWeb (hps, &ptlPointerPos, &ptlClient) ;
98:
99: ptlPointerPos.x = MOUSEMSG(&msg)->x ;
100: ptlPointerPos.y = MOUSEMSG(&msg)->y ;
101:
102: DrawWeb (hps, &ptlPointerPos, &ptlClient) ;
103:
104: WinReleasePS (hps) ;
105: break ; // do default processing
106:
107: case WM_PAINT:
108: hps = WinBeginPaint (hwnd, NULL, NULL) ;
109: GpiErase (hps) ;
110: GpiSetMix (hps, FM_INVERT) ;
111:
112: DrawWeb (hps, &ptlPointerPos, &ptlClient) ;
113:
114: WinEndPaint (hps) ;
115: return 0 ;
116: }
117: return WinDefWindowProc (hwnd, msg, mp1, mp2) ;
118: }
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