131 lines
3.7 KiB
C++
131 lines
3.7 KiB
C++
//-------------------------------------------------------------------------//
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// Module Name: scrollp.cpp
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//
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// Copyright (c) 1985 - 1999, Microsoft Corporation
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//
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// win32k->uxtheme port routines for scrollbar
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//
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// History:
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// 03-21-00 ScottHan Created
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//-------------------------------------------------------------------------//
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#include "stdafx.h"
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#include "scrollp.h"
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extern HBRUSH _UxGrayBrush(VOID);
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extern void _UxFreeGDIResources();
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enum {
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WF_STATE1 = 0,
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WF_STATE2,
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WF_EXSTYLE,
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WF_STYLE,
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};
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//-------------------------------------------------------------------------//
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ULONG _ExpandWF( ULONG ulRaw, ULONG* pulField )
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{
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ULONG ulField = ( HIBYTE(ulRaw) & 0xFC ) >> 2;
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ULONG ulShift = HIBYTE(ulRaw) & 0x03;
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ULONG ulResult = LOBYTE(ulRaw) << (ulShift << 3);
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if( pulField )
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*pulField = ulField;
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return ulResult;
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}
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//-------------------------------------------------------------------------//
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// From usrctl32.h/.cpp
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void SetWindowState(
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HWND hwnd,
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UINT flags)
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{
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ULONG ulField;
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ULONG ulVal = _ExpandWF( flags, &ulField );
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if( WF_EXSTYLE == ulField || WF_STYLE == ulField)
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{
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ULONG dwBits = 0;
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ULONG dwGwl = (WF_EXSTYLE == ulField) ? GWL_EXSTYLE :
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(WF_STYLE == ulField) ? GWL_STYLE : 0;
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UserAssert(dwGwl);
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dwBits = GetWindowLong( hwnd, dwGwl );
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if( (dwBits & ulVal) != ulVal )
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SetWindowLong(hwnd, dwGwl, dwBits | ulVal );
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}
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}
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//-------------------------------------------------------------------------//
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// From usrctl32.h/.cpp
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void ClearWindowState(
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HWND hwnd,
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UINT flags)
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{
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ULONG ulField;
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ULONG ulVal = _ExpandWF( flags, &ulField );
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if( WF_EXSTYLE == ulField || WF_STYLE == ulField)
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{
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ULONG dwBits = 0;
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ULONG dwGwl = (WF_EXSTYLE == ulField) ? GWL_EXSTYLE :
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(WF_STYLE == ulField) ? GWL_STYLE : 0;
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UserAssert(dwGwl);
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dwBits = GetWindowLong( hwnd, dwGwl );
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if( (dwBits & ulVal) != ulVal )
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SetWindowLong(hwnd, dwGwl, dwBits &= ~ulVal );
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}
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}
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//-------------------------------------------------------------------------//
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// window bitfield discriminator (in lobyte of internal flags)
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#define WF_SEL_STATE 0x00
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#define WF_SEL_STATE2 0x04
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#define WF_SEL_STYLE_EX 0x08
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#define WF_SEL_STYLE 0x0C
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#ifdef _WIN64
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#undef GWL_WOWWORDS
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#endif /* _WIN64 */
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#define GWLP_WOWWORDS (-1)
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#define GCL_WOWWORDS (-27)
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#define GCL_WOWMENUNAME (-29)
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#ifdef _WIN64
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#undef GCL_WOWWORDS
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#endif /* _WIN64 */
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#define GCLP_WOWWORDS (-27)
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LONG TestWF(HWND hwnd, DWORD flag)
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{
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LPDWORD pdwWW;
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// GWLP_WOWWORDS returns a pointer to the WW struct in the hwnd.
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// We're interest in the first four DWORDS: state, state2,
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// ExStyle (exposed, although not all bits, by GetWindowExStyle),
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// and style (exposed by GetWindowStyle).
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//
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// The parameter flag, contains information on how to pick the field
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// we want and how to build the WS_xxx or WS_EX_xxx we want to
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// check for.
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//
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// See UsrCtl32.h for more details on how this is done.
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//
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pdwWW = (LPDWORD)GetWindowLongPtr(hwnd, GWLP_WOWWORDS);
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if ( pdwWW )
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{
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INT iField; // the field we want
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INT iShift; // how many bytes to shift flag
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LONG ulMask; // WS_xxx or WS_EX_xxx flag
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iField = ( HIBYTE(flag) & 0xFC ) >> 2;
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iShift = HIBYTE(flag) & 0x03;
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ulMask = LOBYTE(flag) << (iShift << 3);
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UserAssert( 0 <= iField && iField < 4 );
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return pdwWW[iField] & ulMask;
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};
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return 0;
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}
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