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;
}
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;
bChangeParams = TRUE;
}
}
/* 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)
{
new_flags = ESB_ENABLE_BOTH;
if ((nBar != SB_CTL) && bChangeParams)
{
action |= SA_SSI_SHOW;
}
}
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)
{ // FIXME: Arrows and interior.
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);
} // 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);
}
*/ }
/* Return current position */
return lpsi->fMask & SIF_PREVIOUSPOS ? OldPos : pSBData->pos;
}
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;*/
BOOL bChangeParams = FALSE; /* don't show/hide scrollbar if params don't change */
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))
{
EngSetLastError(ERROR_INVALID_PARAMETER);
return 0;
}
psbi = IntGetScrollbarInfoFromWindow(Window, nBar);
Info = IntGetScrollInfoFromWindow(Window, nBar);
/* Set the page size */
if (0 != (lpsi->fMask & SIF_PAGE))
{
if (Info->nPage != lpsi->nPage)
{
Info->nPage = lpsi->nPage;
bChangeParams = TRUE;
}
}
/* Set the scroll pos */
if (0 != (lpsi->fMask & SIF_POS))
{
if (Info->nPos != lpsi->nPos)
{
Info->nPos = lpsi->nPos;
}
}
/* Set the scroll range */
if (0 != (lpsi->fMask & SIF_RANGE))
{
/* Invalid range -> range is set to (0,0) */
if (lpsi->nMin > lpsi->nMax ||
0x80000000 <= (UINT)(lpsi->nMax - lpsi->nMin))
{
Info->nMin = 0;
Info->nMax = 0;
bChangeParams = TRUE;
}
else if (Info->nMin != lpsi->nMin || Info->nMax != lpsi->nMax)
{
Info->nMin = lpsi->nMin;
Info->nMax = lpsi->nMax;
bChangeParams = TRUE;
}
}
/* Make sure the page size is valid */
if (Info->nMax - Info->nMin + 1 < Info->nPage)
{
Info->nPage = Info->nMax - Info->nMin + 1;
}
/* Make sure the pos is inside the range */
if (Info->nPos < Info->nMin)
{
Info->nPos = Info->nMin;
}
else if (Info->nPos > Info->nMax - max(Info->nPage - 1, 0))
{
Info->nPos = Info->nMax - max(Info->nPage - 1, 0);
}
/*
* Don't change the scrollbar state if SetScrollInfo is just called
* with SIF_DISABLENOSCROLL
*/
if (0 == (lpsi->fMask & SIF_ALL))
{
return Info->nPos;
}
/* Check if the scrollbar should be hidden or disabled */
if (0 != (lpsi->fMask & (SIF_RANGE | SIF_PAGE | SIF_DISABLENOSCROLL)))
{
if (Info->nMin >= (int)(Info->nMax - max(Info->nPage - 1, 0)))
{
/* Hide or disable scroll-bar */
if (0 != (lpsi->fMask & SIF_DISABLENOSCROLL))
{
/* new_flags = ESB_DISABLE_BOTH;*/
}
else if ((nBar != SB_CTL) && bChangeParams)
{
co_UserShowScrollBar(Window, nBar, FALSE);
return Info->nPos;
}
}
else /* Show and enable scroll-bar */
{
/* new_flags = 0;*/
if ((nBar != SB_CTL) && bChangeParams)
{
co_UserShowScrollBar(Window, nBar, TRUE);
}
}
#if 0
if (infoPtr->flags != new_flags) /* check arrow flags */
{
infoPtr->flags = new_flags;
*Action |= SA_SSI_REPAINT_ARROWS;
}
#endif
}
if (bRedraw)
{
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);
}
/* Return current position */
return Info->nPos;
}
