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reactos/win32ss/user/ntuser/scrollbar.c
Joachim Henze 8bb9434d3e [WIN32SS] Fix regression CORE-16721 
"Scrolling by pressing the scrollbar arrows does not draw the arrows as pressed"
Fixed by a patch of JIRA-user 'I_kill_bugs'. Thank you very much!

The regression was introduced by 0.4.11-dev-586-g
929a2c6637
(which itself aimed to fix CORE-13986,
but not CORE-13918 as erroneously stated in commit comment)

I intend to port this back into 0.4.13-RC later.
2020-03-12 22:55:04 +01:00

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/*
* COPYRIGHT: See COPYING in the top level directory
* PROJECT: ReactOS kernel
* PURPOSE: Scrollbars
* FILE: win32ss/user/ntuser/scrollbar.c
* PROGRAMER: Thomas Weidenmueller (w3seek@users.sourceforge.net)
* Jason Filby (jasonfilby@yahoo.com)
*/
#include <win32k.h>
DBG_DEFAULT_CHANNEL(UserScrollbar);
/* Definitions for scrollbar hit testing [See SCROLLBARINFO in MSDN] */
#define SCROLL_NOWHERE 0x00 /* Outside the scroll bar */
#define SCROLL_TOP_ARROW 0x01 /* Top or left arrow */
#define SCROLL_TOP_RECT 0x02 /* Rectangle between the top arrow and the thumb */
#define SCROLL_THUMB 0x03 /* Thumb rectangle */
#define SCROLL_BOTTOM_RECT 0x04 /* Rectangle between the thumb and the bottom arrow */
#define SCROLL_BOTTOM_ARROW 0x05 /* Bottom or right arrow */
#define SCROLL_FIRST_DELAY 200 /* Delay (in ms) before first repetition when
holding the button down */
#define SCROLL_REPEAT_DELAY 50 /* Delay (in ms) between scroll repetitions */
#define SCROLL_TIMER 0 /* Scroll timer id */
/* Minimum size of the rectangle between the arrows */
#define SCROLL_MIN_RECT 4
/* Minimum size of the thumb in pixels */
#define SCROLL_MIN_THUMB 6
/* Overlap between arrows and thumb */
#define SCROLL_ARROW_THUMB_OVERLAP 0
//
//
//
#define MINTRACKTHUMB 8 /* Minimum size of the rectangle between the arrows */
/* What to do after SetScrollInfo() */
#define SA_SSI_HIDE 0x0001
#define SA_SSI_SHOW 0x0002
#define SA_SSI_REFRESH 0x0004
#define SA_SSI_REPAINT_ARROWS 0x0008
#define SBRG_SCROLLBAR 0 /* The scrollbar itself */
#define SBRG_TOPRIGHTBTN 1 /* The top or right button */
#define SBRG_PAGEUPRIGHT 2 /* The page up or page right region */
#define SBRG_SCROLLBOX 3 /* The scroll box */
#define SBRG_PAGEDOWNLEFT 4 /* The page down or page left region */
#define SBRG_BOTTOMLEFTBTN 5 /* The bottom or left button */
#define CHANGERGSTATE(item, status) \
if(Info->rgstate[(item)] != (status)) \
Chg = TRUE; \
Info->rgstate[(item)] = (status);
/* FUNCTIONS *****************************************************************/
BOOL APIENTRY
IntEnableScrollBar(BOOL Horz, PSCROLLBARINFO Info, UINT wArrows);
static void
IntRefeshScrollInterior(PWND pWnd, INT nBar, PSCROLLBARINFO psbi);
/* Ported from WINE20020904 */
/* Compute the scroll bar rectangle, in drawing coordinates (i.e. client coords for SB_CTL, window coords for SB_VERT and
* SB_HORZ). 'arrowSize' returns the width or height of an arrow (depending on * the orientation of the scrollbar),
* 'thumbSize' returns the size of the thumb, and 'thumbPos' returns the position of the thumb relative to the left or to
* the top. Return TRUE if the scrollbar is vertical, FALSE if horizontal.
*/
static inline void mirror_rect( const RECT *window_rect, RECT *rect )
{
int width = window_rect->right - window_rect->left;
int tmp = rect->left;
rect->left = width - rect->right;
rect->right = width - tmp;
}
PSBDATA FASTCALL
IntGetSBData(PWND pwnd, INT Bar)
{
PSBWND pSBWnd;
PSBINFO pSBInfo;
pSBInfo = pwnd->pSBInfo;
switch (Bar)
{
case SB_HORZ:
return &pSBInfo->Horz;
case SB_VERT:
return &pSBInfo->Vert;
case SB_CTL:
if ( pwnd->cbwndExtra < (sizeof(SBWND)-sizeof(WND)) )
{
ERR("IntGetSBData Wrong Extra bytes for CTL Scrollbar!\n");
return 0;
}
pSBWnd = (PSBWND)pwnd;
return (PSBDATA)&pSBWnd->SBCalc;
default:
ERR("IntGetSBData Bad Bar!\n");
}
return NULL;
}
BOOL FASTCALL
IntGetScrollBarRect (PWND Wnd, INT nBar, RECTL *lprect)
{
BOOL vertical;
*lprect = Wnd->rcClient;
RECTL_vOffsetRect( lprect, -Wnd->rcWindow.left, -Wnd->rcWindow.top );
if (Wnd->ExStyle & WS_EX_LAYOUTRTL)
mirror_rect( &Wnd->rcWindow, lprect );
switch (nBar)
{
case SB_HORZ:
lprect->top = lprect->bottom;
lprect->bottom += UserGetSystemMetrics (SM_CYHSCROLL);
if (Wnd->style & WS_BORDER)
{
lprect->left--;
lprect->right++;
}
else if (Wnd->style & WS_VSCROLL)
{
lprect->right++;
}
vertical = FALSE;
break;
case SB_VERT:
if(Wnd->ExStyle & WS_EX_LEFTSCROLLBAR)
{
lprect->right = lprect->left;
lprect->left -= UserGetSystemMetrics(SM_CXVSCROLL);
}
else
{
lprect->left = lprect->right;
lprect->right += UserGetSystemMetrics(SM_CXVSCROLL);
}
if (Wnd->style & WS_BORDER)
{
lprect->top--;
lprect->bottom++;
}
else if (Wnd->style & WS_HSCROLL)
{
lprect->bottom++;
}
vertical = TRUE;
break;
case SB_CTL:
IntGetClientRect (Wnd, lprect);
vertical = !!(Wnd->style & SBS_VERT);
break;
default:
return FALSE;
}
return vertical;
}
BOOL FASTCALL
IntCalculateThumb(PWND Wnd, LONG idObject, PSCROLLBARINFO psbi, PSBDATA pSBData)
{
INT Thumb, ThumbBox, ThumbPos, cxy, mx;
RECTL ClientRect;
switch(idObject)
{
case SB_HORZ:
Thumb = UserGetSystemMetrics(SM_CXHSCROLL);
cxy = psbi->rcScrollBar.right - psbi->rcScrollBar.left;
break;
case SB_VERT:
Thumb = UserGetSystemMetrics(SM_CYVSCROLL);
cxy = psbi->rcScrollBar.bottom - psbi->rcScrollBar.top;
break;
case SB_CTL:
IntGetClientRect(Wnd, &ClientRect);
if(Wnd->style & SBS_VERT)
{
Thumb = UserGetSystemMetrics(SM_CYVSCROLL);
cxy = ClientRect.bottom - ClientRect.top;
}
else
{
Thumb = UserGetSystemMetrics(SM_CXHSCROLL);
cxy = ClientRect.right - ClientRect.left;
}
break;
default:
return FALSE;
}
ThumbPos = Thumb;
/* Calculate Thumb */
if(cxy <= (2 * Thumb))
{
Thumb = cxy / 2;
psbi->xyThumbTop = 0;
psbi->xyThumbBottom = 0;
ThumbPos = Thumb;
}
else if (psbi->rgstate[SBRG_TOPRIGHTBTN] == STATE_SYSTEM_UNAVAILABLE &&
psbi->rgstate[SBRG_BOTTOMLEFTBTN] == STATE_SYSTEM_UNAVAILABLE &&
pSBData->posMin >= (int)(pSBData->posMax - max(pSBData->page - 1, 0)))
{
/* Nothing to scroll */
psbi->xyThumbTop = 0;
psbi->xyThumbBottom = 0;
}
else
{
ThumbBox = pSBData->page ? MINTRACKTHUMB : UserGetSystemMetrics(SM_CXHTHUMB);
cxy -= (2 * Thumb);
if(cxy >= ThumbBox)
{
if(pSBData->page)
{
ThumbBox = max(EngMulDiv(cxy, pSBData->page, pSBData->posMax - pSBData->posMin + 1), ThumbBox);
}
if(cxy > ThumbBox)
{
mx = pSBData->posMax - max(pSBData->page - 1, 0);
if(pSBData->posMin < mx)
ThumbPos = Thumb + EngMulDiv(cxy - ThumbBox, pSBData->pos - pSBData->posMin, mx - pSBData->posMin);
else
ThumbPos = Thumb + ThumbBox;
}
psbi->xyThumbTop = ThumbPos;
psbi->xyThumbBottom = ThumbPos + ThumbBox;
}
else
{
psbi->xyThumbTop = 0;
psbi->xyThumbBottom = 0;
}
}
psbi->dxyLineButton = Thumb;
return TRUE;
}
/*
static VOID FASTCALL
IntUpdateSBInfo(PWND Window, int wBar)
{
PSCROLLBARINFO sbi;
PSBDATA pSBData;
ASSERT(Window);
ASSERT(Window->pSBInfo);
ASSERT(Window->pSBInfoex);
sbi = IntGetScrollbarInfoFromWindow(Window, wBar);
pSBData = IntGetSBData(Window, wBar);
IntGetScrollBarRect(Window, wBar, &(sbi->rcScrollBar));
IntCalculateThumb(Window, wBar, sbi, pSBData);
}
*/
static BOOL FASTCALL
co_IntGetScrollInfo(PWND Window, INT nBar, PSBDATA pSBData, LPSCROLLINFO lpsi)
{
UINT Mask;
LPSCROLLINFO psi;
ASSERT_REFS_CO(Window);
if(!SBID_IS_VALID(nBar))
{
EngSetLastError(ERROR_INVALID_PARAMETER);
ERR("Trying to get scrollinfo for unknown scrollbar type %d\n", nBar);
return FALSE;
}
if (!Window->pSBInfo)
{
ERR("IntGetScrollInfo No window scrollbar info!\n");
return FALSE;
}
psi = IntGetScrollInfoFromWindow(Window, nBar);
if (lpsi->fMask == SIF_ALL)
{
Mask = SIF_PAGE | SIF_POS | SIF_RANGE | SIF_TRACKPOS;
}
else
{
Mask = lpsi->fMask;
}
if (0 != (Mask & SIF_PAGE))
{
lpsi->nPage = psi->nPage;
}
if (0 != (Mask & SIF_POS))
{
lpsi->nPos = psi->nPos;
}
if (0 != (Mask & SIF_RANGE))
{
lpsi->nMin = psi->nMin;
lpsi->nMax = psi->nMax;
}
if (0 != (Mask & SIF_TRACKPOS))
{
lpsi->nTrackPos = psi->nTrackPos;
}
return TRUE;
}
BOOL FASTCALL
NEWco_IntGetScrollInfo(
PWND pWnd,
INT nBar,
PSBDATA pSBData,
LPSCROLLINFO lpsi)
{
UINT Mask;
PSBTRACK pSBTrack = pWnd->head.pti->pSBTrack;
if (!SBID_IS_VALID(nBar))
{
EngSetLastError(ERROR_INVALID_PARAMETER);
ERR("Trying to get scrollinfo for unknown scrollbar type %d\n", nBar);
return FALSE;
}
if (!pWnd->pSBInfo || !pSBTrack) return FALSE;
Mask = lpsi->fMask;
if (0 != (Mask & SIF_PAGE))
{
lpsi->nPage = pSBData->page;
}
if (0 != (Mask & SIF_POS))
{
lpsi->nPos = pSBData->pos;
}
if (0 != (Mask & SIF_RANGE))
{
lpsi->nMin = pSBData->posMin;
lpsi->nMax = pSBData->posMax;
}
if (0 != (Mask & SIF_TRACKPOS))
{
if ( pSBTrack &&
pSBTrack->nBar == nBar &&
pSBTrack->spwndTrack == pWnd )
lpsi->nTrackPos = pSBTrack->posNew;
else
lpsi->nTrackPos = pSBData->pos;
}
return (Mask & SIF_ALL) !=0;
}
/*************************************************************************
* SCROLL_GetScrollBarInfo
*
* Internal helper for the API function
*
* PARAMS
* hwnd [I] Handle of window with scrollbar(s)
* idObject [I] One of OBJID_CLIENT, OBJID_HSCROLL, or OBJID_VSCROLL
* info [IO] cbSize specifies the size of the structure
*
* RETURNS
* FALSE if failed
*/
#if 0
static BOOL SCROLL_GetScrollBarInfo(HWND hwnd, LONG idObject, LPSCROLLBARINFO info)
{
LPSCROLLBAR_INFO infoPtr;
INT nBar;
INT nDummy;
DWORD style = GetWindowLongW(hwnd, GWL_STYLE);
BOOL pressed;
RECT rect;
switch (idObject)
{
case OBJID_CLIENT: nBar = SB_CTL; break;
case OBJID_HSCROLL: nBar = SB_HORZ; break;
case OBJID_VSCROLL: nBar = SB_VERT; break;
default: return FALSE;
}
/* handle invalid data structure */
if (info->cbSize != sizeof(*info))
return FALSE;
SCROLL_GetScrollBarRect(hwnd, nBar, &info->rcScrollBar, &nDummy,
&info->dxyLineButton, &info->xyThumbTop);
/* rcScrollBar needs to be in screen coordinates */
GetWindowRect(hwnd, &rect);
OffsetRect(&info->rcScrollBar, rect.left, rect.top);
info->xyThumbBottom = info->xyThumbTop + info->dxyLineButton;
infoPtr = SCROLL_GetInternalInfo(hwnd, nBar, TRUE);
if (!infoPtr)
return FALSE;
/* Scroll bar state */
info->rgstate[0] = 0;
if ((nBar == SB_HORZ && !(style & WS_HSCROLL))
|| (nBar == SB_VERT && !(style & WS_VSCROLL)))
info->rgstate[0] |= STATE_SYSTEM_INVISIBLE;
if (infoPtr->minVal >= infoPtr->maxVal - max(infoPtr->page - 1, 0))
{
if (!(info->rgstate[0] & STATE_SYSTEM_INVISIBLE))
info->rgstate[0] |= STATE_SYSTEM_UNAVAILABLE;
else
info->rgstate[0] |= STATE_SYSTEM_OFFSCREEN;
}
if (nBar == SB_CTL && !IsWindowEnabled(hwnd))
info->rgstate[0] |= STATE_SYSTEM_UNAVAILABLE;
pressed = ((nBar == SB_VERT) == SCROLL_trackVertical && GetCapture() == hwnd);
/* Top/left arrow button state. MSDN says top/right, but I don't believe it */
info->rgstate[1] = 0;
if (pressed && SCROLL_trackHitTest == SCROLL_TOP_ARROW)
info->rgstate[1] |= STATE_SYSTEM_PRESSED;
if (infoPtr->flags & ESB_DISABLE_LTUP)
info->rgstate[1] |= STATE_SYSTEM_UNAVAILABLE;
/* Page up/left region state. MSDN says up/right, but I don't believe it */
info->rgstate[2] = 0;
if (infoPtr->curVal == infoPtr->minVal)
info->rgstate[2] |= STATE_SYSTEM_INVISIBLE;
if (pressed && SCROLL_trackHitTest == SCROLL_TOP_RECT)
info->rgstate[2] |= STATE_SYSTEM_PRESSED;
/* Thumb state */
info->rgstate[3] = 0;
if (pressed && SCROLL_trackHitTest == SCROLL_THUMB)
info->rgstate[3] |= STATE_SYSTEM_PRESSED;
/* Page down/right region state. MSDN says down/left, but I don't believe it */
info->rgstate[4] = 0;
if (infoPtr->curVal >= infoPtr->maxVal - 1)
info->rgstate[4] |= STATE_SYSTEM_INVISIBLE;
if (pressed && SCROLL_trackHitTest == SCROLL_BOTTOM_RECT)
info->rgstate[4] |= STATE_SYSTEM_PRESSED;
/* Bottom/right arrow button state. MSDN says bottom/left, but I don't believe it */
info->rgstate[5] = 0;
if (pressed && SCROLL_trackHitTest == SCROLL_BOTTOM_ARROW)
info->rgstate[5] |= STATE_SYSTEM_PRESSED;
if (infoPtr->flags & ESB_DISABLE_RTDN)
info->rgstate[5] |= STATE_SYSTEM_UNAVAILABLE;
return TRUE;
}
#endif
static DWORD FASTCALL
co_IntSetScrollInfo(PWND Window, INT nBar, LPCSCROLLINFO lpsi, BOOL bRedraw)
{
/*
* Update the scrollbar state and set action flags according to
* what has to be done graphics wise.
*/
LPSCROLLINFO Info;
PSCROLLBARINFO psbi;
UINT new_flags;
INT action = 0;
PSBDATA pSBData;
DWORD OldPos = 0;
BOOL bChangeParams = FALSE; /* Don't show/hide scrollbar if params don't change */
UINT MaxPage;
int MaxPos;
ASSERT_REFS_CO(Window);
if(!SBID_IS_VALID(nBar))
{
EngSetLastError(ERROR_INVALID_PARAMETER);
ERR("Trying to set scrollinfo for unknown scrollbar type %d", nBar);
return FALSE;
}
if(!co_IntCreateScrollBars(Window))
{
return FALSE;
}
if (lpsi->cbSize != sizeof(SCROLLINFO) &&
lpsi->cbSize != (sizeof(SCROLLINFO) - sizeof(lpsi->nTrackPos)))
{
EngSetLastError(ERROR_INVALID_PARAMETER);
return 0;
}
if (lpsi->fMask & ~(SIF_ALL | SIF_DISABLENOSCROLL | SIF_PREVIOUSPOS))
{
EngSetLastError(ERROR_INVALID_PARAMETER);
return 0;
}
psbi = IntGetScrollbarInfoFromWindow(Window, nBar);
Info = IntGetScrollInfoFromWindow(Window, nBar);
pSBData = IntGetSBData(Window, nBar);
/* Set the page size */
if (lpsi->fMask & SIF_PAGE)
{
if (Info->nPage != lpsi->nPage)
{
Info->nPage = lpsi->nPage;
pSBData->page = lpsi->nPage;
bChangeParams = TRUE;
}
}
/* Set the scroll pos */
if (lpsi->fMask & SIF_POS)
{
if (Info->nPos != lpsi->nPos)
{
OldPos = Info->nPos;
Info->nPos = lpsi->nPos;
pSBData->pos = lpsi->nPos;
}
}
/* Set the scroll range */
if (lpsi->fMask & SIF_RANGE)
{
if (lpsi->nMin > lpsi->nMax)
{
Info->nMin = lpsi->nMin;
Info->nMax = lpsi->nMin;
pSBData->posMin = lpsi->nMin;
pSBData->posMax = lpsi->nMin;
bChangeParams = TRUE;
}
else if (Info->nMin != lpsi->nMin || Info->nMax != lpsi->nMax)
{
Info->nMin = lpsi->nMin;
Info->nMax = lpsi->nMax;
pSBData->posMin = lpsi->nMin;
pSBData->posMax = lpsi->nMax;
bChangeParams = TRUE;
}
}
/* Make sure the page size is valid */
MaxPage = abs(Info->nMax - Info->nMin) + 1;
if (Info->nPage > MaxPage)
{
pSBData->page = Info->nPage = MaxPage;
}
/* Make sure the pos is inside the range */
MaxPos = Info->nMax + 1 - (int)max(Info->nPage, 1);
ASSERT(MaxPos >= Info->nMin);
if (Info->nPos < Info->nMin)
{
pSBData->pos = Info->nPos = Info->nMin;
}
else if (Info->nPos > MaxPos)
{
pSBData->pos = Info->nPos = MaxPos;
}
/*
* Don't change the scrollbar state if SetScrollInfo is just called
* with SIF_DISABLENOSCROLL
*/
if (!(lpsi->fMask & SIF_ALL))
{
//goto done;
return lpsi->fMask & SIF_PREVIOUSPOS ? OldPos : pSBData->pos;
}
/* Check if the scrollbar should be hidden or disabled */
if (lpsi->fMask & (SIF_RANGE | SIF_PAGE | SIF_DISABLENOSCROLL))
{
new_flags = Window->pSBInfo->WSBflags;
if (Info->nMin >= (int)(Info->nMax - max(Info->nPage - 1, 0)))
{
/* Hide or disable scroll-bar */
if (lpsi->fMask & SIF_DISABLENOSCROLL)
{
new_flags = ESB_DISABLE_BOTH;
bChangeParams = TRUE;
}
else if ((nBar != SB_CTL) && bChangeParams)
{
action = SA_SSI_HIDE;
}
}
else /* Show and enable scroll-bar only if no page only changed. */
if (lpsi->fMask != SIF_PAGE)
{
if ((nBar != SB_CTL) && bChangeParams)
{
new_flags = ESB_ENABLE_BOTH;
action |= SA_SSI_SHOW;
}
else if (nBar == SB_CTL)
{
new_flags = ESB_ENABLE_BOTH;
}
}
if (Window->pSBInfo->WSBflags != new_flags) /* Check arrow flags */
{
Window->pSBInfo->WSBflags = new_flags;
action |= SA_SSI_REPAINT_ARROWS;
}
}
//done:
if ( action & SA_SSI_HIDE )
{
co_UserShowScrollBar(Window, nBar, FALSE, FALSE);
}
else
{
if ( action & SA_SSI_SHOW )
if ( co_UserShowScrollBar(Window, nBar, TRUE, TRUE) )
return lpsi->fMask & SIF_PREVIOUSPOS ? OldPos : pSBData->pos; /* SetWindowPos() already did the painting */
if (bRedraw)
{
if (action & SA_SSI_REPAINT_ARROWS)
{ // Redraw the entire bar.
RECTL UpdateRect = psbi->rcScrollBar;
UpdateRect.left -= Window->rcClient.left - Window->rcWindow.left;
UpdateRect.right -= Window->rcClient.left - Window->rcWindow.left;
UpdateRect.top -= Window->rcClient.top - Window->rcWindow.top;
UpdateRect.bottom -= Window->rcClient.top - Window->rcWindow.top;
co_UserRedrawWindow(Window, &UpdateRect, 0, RDW_INVALIDATE | RDW_FRAME);
}
else
{
// Redraw only the interior part of the bar.
IntRefeshScrollInterior(Window, nBar, psbi);
}
} // FIXME: Arrows
/* else if( action & SA_SSI_REPAINT_ARROWS )
{
RECTL UpdateRect = psbi->rcScrollBar;
UpdateRect.left -= Window->rcClient.left - Window->rcWindow.left;
UpdateRect.right -= Window->rcClient.left - Window->rcWindow.left;
UpdateRect.top -= Window->rcClient.top - Window->rcWindow.top;
UpdateRect.bottom -= Window->rcClient.top - Window->rcWindow.top;
co_UserRedrawWindow(Window, &UpdateRect, 0, RDW_INVALIDATE | RDW_FRAME);
}
*/ }
if (bChangeParams && (nBar == SB_HORZ || nBar == SB_VERT) && (lpsi->fMask & SIF_DISABLENOSCROLL))
{
IntEnableScrollBar(nBar == SB_HORZ, psbi, Window->pSBInfo->WSBflags);
}
/* Return current position */
return lpsi->fMask & SIF_PREVIOUSPOS ? OldPos : pSBData->pos;
}
BOOL FASTCALL
co_IntGetScrollBarInfo(PWND Window, LONG idObject, PSCROLLBARINFO psbi)
{
INT Bar;
PSCROLLBARINFO sbi;
PSBDATA pSBData;
ASSERT_REFS_CO(Window);
Bar = SBOBJ_TO_SBID(idObject);
if(!SBID_IS_VALID(Bar))
{
EngSetLastError(ERROR_INVALID_PARAMETER);
ERR("Trying to get scrollinfo for unknown scrollbar type %d\n", Bar);
return FALSE;
}
if(!co_IntCreateScrollBars(Window))
{
ERR("Failed to create scrollbars for window.\n");
return FALSE;
}
sbi = IntGetScrollbarInfoFromWindow(Window, Bar);
pSBData = IntGetSBData(Window, Bar);
IntGetScrollBarRect(Window, Bar, &(sbi->rcScrollBar));
IntCalculateThumb(Window, Bar, sbi, pSBData);
/* Scroll bar state */
psbi->rgstate[0] = 0;
if ((Bar == SB_HORZ && !(Window->style & WS_HSCROLL))
|| (Bar == SB_VERT && !(Window->style & WS_VSCROLL)))
psbi->rgstate[0] |= STATE_SYSTEM_INVISIBLE;
if (pSBData->posMin >= pSBData->posMax - max(pSBData->page - 1, 0))
{
if (!(psbi->rgstate[0] & STATE_SYSTEM_INVISIBLE))
psbi->rgstate[0] |= STATE_SYSTEM_UNAVAILABLE;
else
psbi->rgstate[0] |= STATE_SYSTEM_OFFSCREEN;
}
if (Bar == SB_CTL && !(Window->style & WS_DISABLED))
psbi->rgstate[0] |= STATE_SYSTEM_UNAVAILABLE;
RtlCopyMemory(psbi, sbi, sizeof(SCROLLBARINFO));
return TRUE;
}
BOOL FASTCALL
co_IntSetScrollBarInfo(PWND Window, LONG idObject, PSETSCROLLBARINFO psbi)
{
INT Bar;
PSCROLLBARINFO sbi;
LPSCROLLINFO psi;
ASSERT_REFS_CO(Window);
Bar = SBOBJ_TO_SBID(idObject);
if(!SBID_IS_VALID(Bar))
{
EngSetLastError(ERROR_INVALID_PARAMETER);
ERR("Trying to get scrollinfo for unknown scrollbar type %d\n", Bar);
return FALSE;
}
if(!co_IntCreateScrollBars(Window))
{
ERR("Failed to create scrollbars for window.\n");
return FALSE;
}
sbi = IntGetScrollbarInfoFromWindow(Window, Bar);
psi = IntGetScrollInfoFromWindow(Window, Bar);
psi->nTrackPos = psbi->nTrackPos;
sbi->reserved = psbi->reserved;
RtlCopyMemory(&sbi->rgstate, &psbi->rgstate, sizeof(psbi->rgstate));
return TRUE;
}
BOOL FASTCALL
co_IntCreateScrollBars(PWND Window)
{
PSCROLLBARINFO psbi;
PSBDATA pSBData;
ULONG Size, s;
INT i;
ASSERT_REFS_CO(Window);
if (Window->pSBInfo && Window->pSBInfoex)
{
/* No need to create it anymore */
return TRUE;
}
/* Allocate memory for all scrollbars (HORZ, VERT, CONTROL) */
Size = 3 * (sizeof(SBINFOEX));
if(!(Window->pSBInfoex = ExAllocatePoolWithTag(PagedPool, Size, TAG_SBARINFO)))
{
ERR("Unable to allocate memory for scrollbar information for window %p\n", Window->head.h);
return FALSE;
}
RtlZeroMemory(Window->pSBInfoex, Size);
if(!(Window->pSBInfo = DesktopHeapAlloc( Window->head.rpdesk, sizeof(SBINFO))))
{
ERR("Unable to allocate memory for scrollbar information for window %p\n", Window->head.h);
return FALSE;
}
RtlZeroMemory(Window->pSBInfo, sizeof(SBINFO));
Window->pSBInfo->Vert.posMax = 100;
Window->pSBInfo->Horz.posMax = 100;
co_WinPosGetNonClientSize(Window,
&Window->rcWindow,
&Window->rcClient);
for(s = SB_HORZ; s <= SB_VERT; s++)
{
psbi = IntGetScrollbarInfoFromWindow(Window, s);
psbi->cbSize = sizeof(SCROLLBARINFO);
for (i = 0; i < CCHILDREN_SCROLLBAR + 1; i++)
psbi->rgstate[i] = 0;
pSBData = IntGetSBData(Window, s);
IntGetScrollBarRect(Window, s, &(psbi->rcScrollBar));
IntCalculateThumb(Window, s, psbi, pSBData);
}
return TRUE;
}
BOOL FASTCALL
IntDestroyScrollBars(PWND Window)
{
if (Window->pSBInfo && Window->pSBInfoex)
{
DesktopHeapFree(Window->head.rpdesk, Window->pSBInfo);
Window->pSBInfo = NULL;
ExFreePoolWithTag(Window->pSBInfoex, TAG_SBARINFO);
Window->pSBInfoex = NULL;
return TRUE;
}
return FALSE;
}
BOOL APIENTRY
IntEnableScrollBar(BOOL Horz, PSCROLLBARINFO Info, UINT wArrows)
{
BOOL Chg = FALSE;
switch(wArrows)
{
case ESB_DISABLE_BOTH:
CHANGERGSTATE(SBRG_TOPRIGHTBTN, STATE_SYSTEM_UNAVAILABLE);
CHANGERGSTATE(SBRG_BOTTOMLEFTBTN, STATE_SYSTEM_UNAVAILABLE);
break;
case ESB_DISABLE_RTDN:
if(Horz)
{
CHANGERGSTATE(SBRG_BOTTOMLEFTBTN, STATE_SYSTEM_UNAVAILABLE);
}
else
{
CHANGERGSTATE(SBRG_TOPRIGHTBTN, STATE_SYSTEM_UNAVAILABLE);
}
break;
case ESB_DISABLE_LTUP:
if(Horz)
{
CHANGERGSTATE(SBRG_TOPRIGHTBTN, STATE_SYSTEM_UNAVAILABLE);
}
else
{
CHANGERGSTATE(SBRG_BOTTOMLEFTBTN, STATE_SYSTEM_UNAVAILABLE);
}
break;
case ESB_ENABLE_BOTH:
CHANGERGSTATE(SBRG_TOPRIGHTBTN, 0);
CHANGERGSTATE(SBRG_BOTTOMLEFTBTN, 0);
break;
}
return Chg;
}
/* Ported from WINE20020904 (SCROLL_ShowScrollBar) */
DWORD FASTCALL
co_UserShowScrollBar(PWND Wnd, int nBar, BOOL fShowH, BOOL fShowV)
{
ULONG old_style, set_bits = 0, clear_bits = 0;
ASSERT_REFS_CO(Wnd);
switch(nBar)
{
case SB_CTL:
{
//IntUpdateSBInfo(Wnd, SB_CTL); // Is this needed? Was tested w/o!
co_WinPosShowWindow(Wnd, fShowH ? SW_SHOW : SW_HIDE);
return TRUE;
}
case SB_BOTH:
case SB_HORZ:
if (fShowH) set_bits |= WS_HSCROLL;
else clear_bits |= WS_HSCROLL;
if( nBar == SB_HORZ ) break;
/* Fall through */
case SB_VERT:
if (fShowV) set_bits |= WS_VSCROLL;
else clear_bits |= WS_VSCROLL;
break;
default:
EngSetLastError(ERROR_INVALID_PARAMETER);
return FALSE; /* Nothing to do! */
}
old_style = IntSetStyle( Wnd, set_bits, clear_bits );
if ((old_style & clear_bits) != 0 || (old_style & set_bits) != set_bits)
{
///// Is this needed? Was tested w/o!
//if (Wnd->style & WS_HSCROLL) IntUpdateSBInfo(Wnd, SB_HORZ);
//if (Wnd->style & WS_VSCROLL) IntUpdateSBInfo(Wnd, SB_VERT);
/////
/* Frame has been changed, let the window redraw itself */
co_WinPosSetWindowPos( Wnd, 0, 0, 0, 0, 0, SWP_NOSIZE | SWP_NOMOVE
| SWP_NOACTIVATE | SWP_NOZORDER | SWP_FRAMECHANGED );
return TRUE;
}
return FALSE; /* no frame changes */
}
static void
IntDrawScrollInterior(PWND pWnd, HDC hDC, INT nBar, BOOL Vertical, PSCROLLBARINFO ScrollBarInfo)
{
INT ThumbSize = ScrollBarInfo->xyThumbBottom - ScrollBarInfo->xyThumbTop;
INT ThumbTop = ScrollBarInfo->xyThumbTop;
RECT Rect;
HBRUSH hSaveBrush, hBrush;
BOOL TopSelected = FALSE, BottomSelected = FALSE;
if (ScrollBarInfo->rgstate[SCROLL_TOP_RECT] & STATE_SYSTEM_PRESSED)
TopSelected = TRUE;
if (ScrollBarInfo->rgstate[SCROLL_BOTTOM_RECT] & STATE_SYSTEM_PRESSED)
BottomSelected = TRUE;
/*
* Only scrollbar controls send WM_CTLCOLORSCROLLBAR.
* The window-owned scrollbars need to call DefWndControlColor
* to correctly setup default scrollbar colors
*/
if (nBar == SB_CTL)
{
hBrush = GetControlBrush( pWnd, hDC, WM_CTLCOLORSCROLLBAR);
if (!hBrush)
hBrush = IntGetSysColorBrush(COLOR_SCROLLBAR);
}
else
{
hBrush = DefWndControlColor(hDC, CTLCOLOR_SCROLLBAR);
}
hSaveBrush = NtGdiSelectBrush(hDC, hBrush);
/* Calculate the scroll rectangle */
if (Vertical)
{
Rect.top = ScrollBarInfo->rcScrollBar.top + ScrollBarInfo->dxyLineButton;
Rect.bottom = ScrollBarInfo->rcScrollBar.bottom - ScrollBarInfo->dxyLineButton;
Rect.left = ScrollBarInfo->rcScrollBar.left;
Rect.right = ScrollBarInfo->rcScrollBar.right;
}
else
{
Rect.top = ScrollBarInfo->rcScrollBar.top;
Rect.bottom = ScrollBarInfo->rcScrollBar.bottom;
Rect.left = ScrollBarInfo->rcScrollBar.left + ScrollBarInfo->dxyLineButton;
Rect.right = ScrollBarInfo->rcScrollBar.right - ScrollBarInfo->dxyLineButton;
}
/* Draw the scroll rectangles and thumb */
if (!ScrollBarInfo->xyThumbBottom)
{
NtGdiPatBlt(hDC, Rect.left, Rect.top, Rect.right - Rect.left,
Rect.bottom - Rect.top, PATCOPY);
/* Cleanup and return */
NtGdiSelectBrush(hDC, hSaveBrush);
return;
}
ThumbTop -= ScrollBarInfo->dxyLineButton;
if (ScrollBarInfo->dxyLineButton)
{
if (Vertical)
{
if (ThumbSize)
{
NtGdiPatBlt(hDC, Rect.left, Rect.top, Rect.right - Rect.left,
ThumbTop, TopSelected ? BLACKNESS : PATCOPY);
Rect.top += ThumbTop;
NtGdiPatBlt(hDC, Rect.left, Rect.top + ThumbSize, Rect.right - Rect.left,
Rect.bottom - Rect.top - ThumbSize, BottomSelected ? BLACKNESS : PATCOPY);
Rect.bottom = Rect.top + ThumbSize;
}
else
{
if (ThumbTop)
{
NtGdiPatBlt(hDC, Rect.left, ScrollBarInfo->dxyLineButton,
Rect.right - Rect.left, Rect.bottom - Rect.top, PATCOPY);
}
}
}
else
{
if (ThumbSize)
{
NtGdiPatBlt(hDC, Rect.left, Rect.top, ThumbTop,
Rect.bottom - Rect.top, TopSelected ? BLACKNESS : PATCOPY);
Rect.left += ThumbTop;
NtGdiPatBlt(hDC, Rect.left + ThumbSize, Rect.top,
Rect.right - Rect.left - ThumbSize, Rect.bottom - Rect.top,
BottomSelected ? BLACKNESS : PATCOPY);
Rect.right = Rect.left + ThumbSize;
}
else
{
if (ThumbTop)
{
NtGdiPatBlt(hDC, ScrollBarInfo->dxyLineButton, Rect.top,
Rect.right - Rect.left, Rect.bottom - Rect.top, PATCOPY);
}
}
}
}
/* Draw the thumb */
if (ThumbSize)
DrawEdge(hDC, &Rect, EDGE_RAISED, BF_RECT | BF_MIDDLE);
/* Cleanup */
NtGdiSelectBrush(hDC, hSaveBrush);
}
static VOID FASTCALL
IntDrawScrollArrows(HDC hDC, PSCROLLBARINFO ScrollBarInfo, BOOL Vertical)
{
RECT RectLT, RectRB;
INT ScrollDirFlagLT, ScrollDirFlagRB;
RectLT = RectRB = ScrollBarInfo->rcScrollBar;
if (Vertical)
{
ScrollDirFlagLT = DFCS_SCROLLUP;
ScrollDirFlagRB = DFCS_SCROLLDOWN;
RectLT.bottom = RectLT.top + ScrollBarInfo->dxyLineButton;
RectRB.top = RectRB.bottom - ScrollBarInfo->dxyLineButton;
}
else
{
ScrollDirFlagLT = DFCS_SCROLLLEFT;
ScrollDirFlagRB = DFCS_SCROLLRIGHT;
RectLT.right = RectLT.left + ScrollBarInfo->dxyLineButton;
RectRB.left = RectRB.right - ScrollBarInfo->dxyLineButton;
}
if (ScrollBarInfo->rgstate[SCROLL_TOP_ARROW] & STATE_SYSTEM_PRESSED)
{
ScrollDirFlagLT |= DFCS_PUSHED | DFCS_FLAT;
}
if (ScrollBarInfo->rgstate[SCROLL_TOP_ARROW] & STATE_SYSTEM_UNAVAILABLE)
{
ScrollDirFlagLT |= DFCS_INACTIVE;
}
if (ScrollBarInfo->rgstate[SCROLL_BOTTOM_ARROW] & STATE_SYSTEM_PRESSED)
{
ScrollDirFlagRB |= DFCS_PUSHED | DFCS_FLAT;
}
if (ScrollBarInfo->rgstate[SCROLL_BOTTOM_ARROW] & STATE_SYSTEM_UNAVAILABLE)
{
ScrollDirFlagRB |= DFCS_INACTIVE;
}
DrawFrameControl(hDC, &RectLT, DFC_SCROLL, ScrollDirFlagLT);
DrawFrameControl(hDC, &RectRB, DFC_SCROLL, ScrollDirFlagRB);
}
static LONG FASTCALL
IntScrollGetObjectId(INT SBType)
{
if (SBType == SB_VERT)
return OBJID_VSCROLL;
if (SBType == SB_HORZ)
return OBJID_HSCROLL;
return OBJID_CLIENT;
}
static void
IntRefeshScrollInterior(PWND pWnd, INT nBar, PSCROLLBARINFO psbi)
{
HDC hdc;
BOOL Vertical = ((nBar == SB_CTL) ? ((pWnd->style & SBS_VERT) != 0) : (nBar == SB_VERT));
hdc = UserGetDCEx(pWnd, NULL, DCX_CACHE | ((nBar == SB_CTL) ? 0 : DCX_WINDOW));
if (hdc)
{ /* Get updated info. */
co_IntGetScrollBarInfo(pWnd, IntScrollGetObjectId(nBar), psbi);
IntDrawScrollInterior(pWnd, hdc, nBar, Vertical, psbi);
UserReleaseDC(pWnd, hdc, FALSE);
}
}
void
IntDrawScrollBar(PWND Wnd, HDC DC, INT Bar)
{
//PSBWND pSBWnd;
//INT ThumbSize;
PTHREADINFO pti;
SCROLLBARINFO Info;
BOOL Vertical;
pti = PsGetCurrentThreadWin32Thread();
/*
* Get scroll bar info.
*/
switch (Bar)
{
case SB_HORZ:
Vertical = FALSE;
break;
case SB_VERT:
Vertical = TRUE;
break;
case SB_CTL:
Vertical = (Wnd->style & SBS_VERT) != 0;
break;
default:
return;
}
if (!co_IntGetScrollBarInfo(Wnd, IntScrollGetObjectId(Bar), &Info))
{
return;
}
if (RECTL_bIsEmptyRect(&Info.rcScrollBar))
{
return;
}
//ThumbSize = pSBWnd->pSBCalc->pxThumbBottom - pSBWnd->pSBCalc->pxThumbTop;
/*
* Draw the arrows.
*/
if (Info.dxyLineButton)
{
IntDrawScrollArrows(DC, &Info, Vertical);
}
/*
* Draw the interior.
*/
IntDrawScrollInterior(Wnd, DC, Bar, Vertical, &Info);
/*
* If scroll bar has focus, reposition the caret.
*/
if ( Wnd == pti->MessageQueue->spwndFocus && Bar == SB_CTL )
{
if (Vertical)
{
co_IntSetCaretPos(Info.rcScrollBar.top + 1, Info.dxyLineButton + 1);
}
else
{
co_IntSetCaretPos(Info.dxyLineButton + 1, Info.rcScrollBar.top + 1);
}
}
}
LRESULT APIENTRY
ScrollBarWndProc(HWND hWnd, UINT Msg, WPARAM wParam, LPARAM lParam)
{
LRESULT lResult = 0;
PWND pWnd;
pWnd = UserGetWindowObject(hWnd);
if (!pWnd) return 0;
switch(Msg)
{
case WM_ENABLE:
{
if (pWnd->pSBInfo)
{
pWnd->pSBInfo->WSBflags = wParam ? ESB_ENABLE_BOTH : ESB_DISABLE_BOTH;
}
}
break;
}
return lResult;
}
////
BOOL
APIENTRY
NtUserGetScrollBarInfo(HWND hWnd, LONG idObject, PSCROLLBARINFO psbi)
{
NTSTATUS Status;
SCROLLBARINFO sbi;
PWND Window;
BOOL Ret;
DECLARE_RETURN(BOOL);
USER_REFERENCE_ENTRY Ref;
TRACE("Enter NtUserGetScrollBarInfo\n");
UserEnterExclusive();
Status = MmCopyFromCaller(&sbi, psbi, sizeof(SCROLLBARINFO));
if(!NT_SUCCESS(Status) || (sbi.cbSize != sizeof(SCROLLBARINFO)))
{
SetLastNtError(Status);
RETURN(FALSE);
}
if(!(Window = UserGetWindowObject(hWnd)))
{
RETURN(FALSE);
}
UserRefObjectCo(Window, &Ref);
Ret = co_IntGetScrollBarInfo(Window, idObject, &sbi);
UserDerefObjectCo(Window);
Status = MmCopyToCaller(psbi, &sbi, sizeof(SCROLLBARINFO));
if(!NT_SUCCESS(Status))
{
SetLastNtError(Status);
Ret = FALSE;
}
RETURN( Ret);
CLEANUP:
TRACE("Leave NtUserGetScrollBarInfo, ret=%i\n",_ret_);
UserLeave();
END_CLEANUP;
}
BOOL
APIENTRY
NtUserSBGetParms(
HWND hWnd,
int fnBar,
PSBDATA pSBData,
LPSCROLLINFO lpsi)
{
PWND Window;
SCROLLINFO psi;
BOOL Ret;
SBDATA SBDataSafe;
DECLARE_RETURN(BOOL);
USER_REFERENCE_ENTRY Ref;
TRACE("Enter NtUserGetScrollInfo\n");
UserEnterShared();
_SEH2_TRY
{
RtlCopyMemory(&psi, lpsi, sizeof(SCROLLINFO));
if (pSBData)
{
RtlCopyMemory(&SBDataSafe, pSBData, sizeof(SBDATA));
}
}
_SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
{
ERR("NtUserGetScrollInfo Failed size.\n");
SetLastNtError(_SEH2_GetExceptionCode());
_SEH2_YIELD(RETURN(FALSE));
}
_SEH2_END
if(!(Window = UserGetWindowObject(hWnd)))
{
ERR("NtUserGetScrollInfo Bad window.\n");
RETURN(FALSE);
}
UserRefObjectCo(Window, &Ref);
Ret = co_IntGetScrollInfo(Window, fnBar, &SBDataSafe, &psi);
UserDerefObjectCo(Window);
_SEH2_TRY
{
RtlCopyMemory(lpsi, &psi, sizeof(SCROLLINFO));
}
_SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
{
ERR("NtUserGetScrollInfo Failed copy to user.\n");
SetLastNtError(_SEH2_GetExceptionCode());
_SEH2_YIELD(RETURN(FALSE));
}
_SEH2_END
RETURN( Ret);
CLEANUP:
TRACE("Leave NtUserGetScrollInfo, ret=%i\n",_ret_);
UserLeave();
END_CLEANUP;
}
BOOL
APIENTRY
NtUserEnableScrollBar(
HWND hWnd,
UINT wSBflags,
UINT wArrows)
{
UINT OrigArrows;
PWND Window = NULL;
PSCROLLBARINFO InfoV = NULL, InfoH = NULL;
BOOL Chg = FALSE;
DECLARE_RETURN(BOOL);
USER_REFERENCE_ENTRY Ref;
TRACE("Enter NtUserEnableScrollBar\n");
UserEnterExclusive();
if (!(Window = UserGetWindowObject(hWnd)) ||
UserIsDesktopWindow(Window) || UserIsMessageWindow(Window))
{
RETURN(FALSE);
}
UserRefObjectCo(Window, &Ref);
if (!co_IntCreateScrollBars(Window))
{
RETURN( FALSE);
}
OrigArrows = Window->pSBInfo->WSBflags;
Window->pSBInfo->WSBflags = wArrows;
if (wSBflags == SB_CTL)
{
if ((wArrows == ESB_DISABLE_BOTH || wArrows == ESB_ENABLE_BOTH))
IntEnableWindow(hWnd, (wArrows == ESB_ENABLE_BOTH));
RETURN(TRUE);
}
if(wSBflags != SB_BOTH && !SBID_IS_VALID(wSBflags))
{
EngSetLastError(ERROR_INVALID_PARAMETER);
ERR("Trying to set scrollinfo for unknown scrollbar type %u", wSBflags);
RETURN(FALSE);
}
switch(wSBflags)
{
case SB_BOTH:
InfoV = IntGetScrollbarInfoFromWindow(Window, SB_VERT);
/* Fall through */
case SB_HORZ:
InfoH = IntGetScrollbarInfoFromWindow(Window, SB_HORZ);
break;
case SB_VERT:
InfoV = IntGetScrollbarInfoFromWindow(Window, SB_VERT);
break;
default:
RETURN(FALSE);
}
if(InfoV)
Chg = IntEnableScrollBar(FALSE, InfoV, wArrows);
if(InfoH)
Chg = (IntEnableScrollBar(TRUE, InfoH, wArrows) || Chg);
ERR("FIXME: EnableScrollBar wSBflags %u wArrows %u Chg %d\n", wSBflags, wArrows, Chg);
// Done in user32:
// SCROLL_RefreshScrollBar( hwnd, nBar, TRUE, TRUE );
RETURN( Chg);
if (OrigArrows == wArrows) RETURN( FALSE);
RETURN( TRUE);
CLEANUP:
if (Window)
UserDerefObjectCo(Window);
TRACE("Leave NtUserEnableScrollBar, ret=%i\n",_ret_);
UserLeave();
END_CLEANUP;
}
DWORD
APIENTRY
NtUserSetScrollInfo(
HWND hWnd,
int fnBar,
LPCSCROLLINFO lpsi,
BOOL bRedraw)
{
PWND Window = NULL;
NTSTATUS Status;
SCROLLINFO ScrollInfo;
DECLARE_RETURN(DWORD);
USER_REFERENCE_ENTRY Ref;
TRACE("Enter NtUserSetScrollInfo\n");
UserEnterExclusive();
if(!(Window = UserGetWindowObject(hWnd)) ||
UserIsDesktopWindow(Window) || UserIsMessageWindow(Window))
{
RETURN( 0);
}
UserRefObjectCo(Window, &Ref);
Status = MmCopyFromCaller(&ScrollInfo, lpsi, sizeof(SCROLLINFO) - sizeof(ScrollInfo.nTrackPos));
if(!NT_SUCCESS(Status))
{
SetLastNtError(Status);
RETURN( 0);
}
RETURN(co_IntSetScrollInfo(Window, fnBar, &ScrollInfo, bRedraw));
CLEANUP:
if (Window)
UserDerefObjectCo(Window);
TRACE("Leave NtUserSetScrollInfo, ret=%lu\n", _ret_);
UserLeave();
END_CLEANUP;
}
DWORD APIENTRY
NtUserShowScrollBar(HWND hWnd, int nBar, DWORD bShow)
{
PWND Window;
DECLARE_RETURN(DWORD);
DWORD ret;
USER_REFERENCE_ENTRY Ref;
TRACE("Enter NtUserShowScrollBar\n");
UserEnterExclusive();
if (!(Window = UserGetWindowObject(hWnd)))
{
RETURN(0);
}
UserRefObjectCo(Window, &Ref);
ret = co_UserShowScrollBar(Window, nBar, (nBar == SB_VERT) ? 0 : bShow,
(nBar == SB_HORZ) ? 0 : bShow);
UserDerefObjectCo(Window);
RETURN(ret);
CLEANUP:
TRACE("Leave NtUserShowScrollBar, ret%lu\n", _ret_);
UserLeave();
END_CLEANUP;
}
//// Ugly NtUser API ////
BOOL
APIENTRY
NtUserSetScrollBarInfo(
HWND hWnd,
LONG idObject,
SETSCROLLBARINFO *info)
{
PWND Window = NULL;
SETSCROLLBARINFO Safeinfo;
PSCROLLBARINFO sbi;
LPSCROLLINFO psi;
NTSTATUS Status;
LONG Obj;
DECLARE_RETURN(BOOL);
USER_REFERENCE_ENTRY Ref;
TRACE("Enter NtUserSetScrollBarInfo\n");
UserEnterExclusive();
if(!(Window = UserGetWindowObject(hWnd)))
{
RETURN( FALSE);
}
UserRefObjectCo(Window, &Ref);
Obj = SBOBJ_TO_SBID(idObject);
if(!SBID_IS_VALID(Obj))
{
EngSetLastError(ERROR_INVALID_PARAMETER);
ERR("Trying to set scrollinfo for unknown scrollbar type %d\n", Obj);
RETURN( FALSE);
}
if(!co_IntCreateScrollBars(Window))
{
RETURN(FALSE);
}
Status = MmCopyFromCaller(&Safeinfo, info, sizeof(SETSCROLLBARINFO));
if(!NT_SUCCESS(Status))
{
SetLastNtError(Status);
RETURN(FALSE);
}
sbi = IntGetScrollbarInfoFromWindow(Window, Obj);
psi = IntGetScrollInfoFromWindow(Window, Obj);
psi->nTrackPos = Safeinfo.nTrackPos;
sbi->reserved = Safeinfo.reserved;
RtlCopyMemory(&sbi->rgstate, &Safeinfo.rgstate, sizeof(Safeinfo.rgstate));
RETURN(TRUE);
CLEANUP:
if (Window)
UserDerefObjectCo(Window);
TRACE("Leave NtUserSetScrollBarInfo, ret=%i\n",_ret_);
UserLeave();
END_CLEANUP;
}
/* EOF */
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