137 lines
3.8 KiB
C
137 lines
3.8 KiB
C
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/*++
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*
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* WOW v1.0
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*
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* Copyright (c) 1991, Microsoft Corporation
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*
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* WMSGSBM.C
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* WOW32 16-bit message thunks for SCROLLBARs
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*
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* History:
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* Created 10-Jun-1992 by Bob Day (bobday)
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--*/
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#include "precomp.h"
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#pragma hdrstop
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MODNAME(wmsgbm.c);
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#ifdef DEBUG
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MSGINFO amiSBM[] = {
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{OLDSBM_SETPOS, "SBM_SETPOS"}, // 0x0400
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{OLDSBM_GETPOS, "SBM_GETPOS"}, // 0x0401
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{OLDSBM_SETRANGE, "SBM_SETRANGE"}, // 0x0402
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{OLDSBM_GETRANGE, "SBM_GETRANGE"}, // 0x0403
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{OLDSBM_ENABLEARROWS,"SBM_ENABLE_ARROWS"}, // 0x0404
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};
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PSZ GetSBMMsgName(WORD wMsg)
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{
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INT i;
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register PMSGINFO pmi;
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for (pmi=amiSBM,i=NUMEL(amiSBM); i>0; i--,pmi++)
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if ((WORD)pmi->uMsg == wMsg)
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return pmi->pszMsgName;
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return GetWMMsgName(wMsg);
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}
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#endif
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BOOL FASTCALL ThunkSBMMsg16(LPMSGPARAMEX lpmpex)
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{
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WORD wMsg = lpmpex->Parm16.WndProc.wMsg;
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LOGDEBUG(7,(" Thunking 16-bit scrollbar message %s(%04x)\n", (LPSZ)GetSBMMsgName(wMsg), wMsg));
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wMsg -= WM_USER;
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//
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// For app defined (control) messages that are out of range
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// return TRUE.
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//
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// ChandanC Sept-15-1992
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//
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if (wMsg < (SBM_ENABLE_ARROWS - SBM_SETPOS + 1)) {
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switch(lpmpex->uMsg = wMsg + SBM_SETPOS) {
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// The following messages should not require thunking, because
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// they contain no pointers, handles, or rearranged message parameters,
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// so consequently they are not documented in great detail here:
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//
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// SBM_SETPOS (requires minimal thunking)
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// SBM_GETPOS
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// SBM_ENABLE_ARROWS
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//
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case SBM_GETRANGE:
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//
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// Changed semantics for this message to support 32-bit
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// scroll bar ranges (vs. 16-bit).
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//
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// Win16:
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// posMin = LOWORD(SendMessage(hwnd, SBM_GETRANGE, 0, 0));
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// posMax = HIWORD(SendMessage(hwnd, SBM_GETRANGE, 0, 0));
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//
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// Win32:
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// SendMessage(hwnd, SBM_GETRANGE,
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// (WPARAM) &posMin, (LPARAM) &posMax);
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//
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// Allocate buffers for 32-bit scrollbar proc to put
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// posMin and posMax in.
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lpmpex->uParam = (UINT)lpmpex->MsgBuffer;
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lpmpex->lParam = (LONG)((UINT *)lpmpex->uParam + 1);
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break;
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case SBM_SETRANGE:
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//
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// Changed semantics to support 32-bit scroll bar range:
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//
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// Win16:
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// SendMessage(hwnd, SBM_SETRANGE, fRedraw, MAKELONG(posMin, posMax);
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//
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// Win32:
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// SendMessage(hwnd, fRedraw ? SBM_SETRANGE : SBM_SETRANGEREDRAW,
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// posMin, posMax);
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//
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if (lpmpex->Parm16.WndProc.wParam)
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lpmpex->uMsg = SBM_SETRANGEREDRAW;
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lpmpex->uParam = INT32(LOWORD(lpmpex->Parm16.WndProc.lParam));
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lpmpex->lParam = INT32(HIWORD(lpmpex->Parm16.WndProc.lParam));
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break;
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case SBM_SETPOS:
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lpmpex->uParam = INT32(lpmpex->Parm16.WndProc.wParam); // sign-extend the position
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break;
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}
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}
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return TRUE;
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}
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VOID FASTCALL UnThunkSBMMsg16(LPMSGPARAMEX lpmpex)
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{
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switch (lpmpex->uMsg) {
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case SBM_GETRANGE:
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if (lpmpex->uParam && lpmpex->lParam) {
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lpmpex->lReturn = MAKELONG(*(UINT *)lpmpex->uParam,
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*(UINT *)lpmpex->lParam);
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}
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break;
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}
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}
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