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Rename SCROLL_GetScrollBarInfo to SCROLL_GetInternalInfo and make 

allocation of a new info structure optional.
Add some descriptions.
oldstable
Vitaly Lipatov 2005-02-17 12:03:33 +00:00 committed by Alexandre Julliard
parent 9074f257e0
commit 926a86323d
1 changed files with 51 additions and 31 deletions
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82
dlls/user/scroll.c
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@ -130,14 +130,14 @@ const struct builtin_class_descr SCROLL_builtin_class =
IDC_ARROW, /* cursor */
0 /* brush */
};
/***********************************************************************
* SCROLL_ScrollInfoValid
*
* Determine if the supplied SCROLLINFO struct is valid.
* info [in] The SCROLLINFO struct to be tested
*/
inline static BOOL SCROLL_ScrollInfoValid(
LPSCROLLINFO info /* [in] The SCROLLINFO struct to be tested */)
inline static BOOL SCROLL_ScrollInfoValid( LPCSCROLLINFO info )
{
return !(info->fMask & ~(SIF_ALL | SIF_DISABLENOSCROLL)
|| (info->cbSize != sizeof(*info)
@ -146,11 +146,15 @@ LPSCROLLINFO info /* [in] The SCROLLINFO struct to be tested */)
/***********************************************************************
* SCROLL_GetScrollBarInfo
* SCROLL_GetInternalInfo
* Returns pointer to internal SCROLLBAR_INFO structure for nBar
* or NULL if failed (f.i. scroll bar does not exist yet)
* If alloc is TRUE and the struct does not exist yet, create it.
*/
static SCROLLBAR_INFO *SCROLL_GetScrollBarInfo( HWND hwnd, INT nBar )
static SCROLLBAR_INFO *SCROLL_GetInternalInfo( HWND hwnd, INT nBar, BOOL alloc )
{
SCROLLBAR_INFO *infoPtr;
SCROLLBAR_INFO *infoPtr = NULL;
WND *wndPtr = WIN_GetPtr( hwnd );
if (!wndPtr || wndPtr == WND_OTHER_PROCESS) return NULL;
@ -159,17 +163,20 @@ static SCROLLBAR_INFO *SCROLL_GetScrollBarInfo( HWND hwnd, INT nBar )
case SB_HORZ: infoPtr = (SCROLLBAR_INFO *)wndPtr->pHScroll; break;
case SB_VERT: infoPtr = (SCROLLBAR_INFO *)wndPtr->pVScroll; break;
case SB_CTL: infoPtr = (SCROLLBAR_INFO *)wndPtr->wExtra; break;
default:
WIN_ReleaseWndPtr( wndPtr );
return NULL;
case SB_BOTH: WARN("with SB_BOTH"); break;
}
if (!infoPtr) /* Create the info structure if needed */
if (!infoPtr && alloc)
{
if ((infoPtr = HeapAlloc( GetProcessHeap(), 0, sizeof(SCROLLBAR_INFO) )))
if (nBar != SB_HORZ && nBar != SB_VERT)
WARN("Cannot initialize nBar=%d\n",nBar);
else if ((infoPtr = HeapAlloc( GetProcessHeap(), 0, sizeof(SCROLLBAR_INFO) )))
{
/* Set default values */
infoPtr->minVal = infoPtr->curVal = infoPtr->page = 0;
/* From MSDN: max for a standard scroll bar is 100 by default. */
infoPtr->maxVal = 100;
/* Scroll bar is enabled by default after create */
infoPtr->flags = ESB_ENABLE_BOTH;
if (nBar == SB_HORZ) wndPtr->pHScroll = infoPtr;
else wndPtr->pVScroll = infoPtr;
@ -255,8 +262,12 @@ static BOOL SCROLL_GetScrollBarRect( HWND hwnd, INT nBar, RECT *lprect,
}
else
{
SCROLLBAR_INFO *info = SCROLL_GetScrollBarInfo( hwnd, nBar );
SCROLLBAR_INFO *info = SCROLL_GetInternalInfo( hwnd, nBar, FALSE );
if (!info)
{
WARN("called for missing scroll bar");
return FALSE;
}
*arrowSize = GetSystemMetrics(SM_CXVSCROLL);
pixels -= (2 * (GetSystemMetrics(SM_CXVSCROLL) - SCROLL_ARROW_THUMB_OVERLAP));
@ -662,7 +673,7 @@ void SCROLL_DrawScrollBar( HWND hwnd, HDC hdc, INT nBar,
INT arrowSize, thumbSize, thumbPos;
RECT rect;
BOOL vertical;
SCROLLBAR_INFO *infoPtr = SCROLL_GetScrollBarInfo( hwnd, nBar );
SCROLLBAR_INFO *infoPtr = SCROLL_GetInternalInfo( hwnd, nBar, FALSE );
BOOL Save_SCROLL_MovingThumb = SCROLL_MovingThumb;
DWORD style = GetWindowLongW( hwnd, GWL_STYLE );
@ -813,7 +824,7 @@ static void SCROLL_HandleScrollEvent( HWND hwnd, INT nBar, UINT msg, POINT pt)
RECT rect;
HDC hdc;
SCROLLBAR_INFO *infoPtr = SCROLL_GetScrollBarInfo( hwnd, nBar );
SCROLLBAR_INFO *infoPtr = SCROLL_GetInternalInfo( hwnd, nBar, FALSE );
if (!infoPtr) return;
if ((SCROLL_trackHitTest == SCROLL_NOWHERE) && (msg != WM_LBUTTONDOWN))
return;
@ -1112,7 +1123,7 @@ void SCROLL_TrackScrollBar( HWND hwnd, INT scrollbar, POINT pt )
*/
static void SCROLL_CreateScrollBar(HWND hwnd, LPCREATESTRUCTW lpCreate)
{
LPSCROLLBAR_INFO info = SCROLL_GetScrollBarInfo(hwnd, SB_CTL);
LPSCROLLBAR_INFO info = SCROLL_GetInternalInfo(hwnd, SB_CTL, TRUE);
if (!info) return;
TRACE("hwnd=%p lpCreate=%p\n", hwnd, lpCreate);
@ -1169,6 +1180,9 @@ static void SCROLL_CreateScrollBar(HWND hwnd, LPCREATESTRUCTW lpCreate)
* hwnd [I] Handle of window with scrollbar(s)
* nBar [I] One of SB_HORZ, SB_VERT, or SB_CTL
* info [IO] fMask specifies which values to retrieve
*
* RETURNS
* FALSE if requested field not filled (f.i. scroll bar does not exist)
*/
static BOOL SCROLL_GetScrollInfo(HWND hwnd, INT nBar, LPSCROLLINFO info)
{
@ -1176,7 +1190,7 @@ static BOOL SCROLL_GetScrollInfo(HWND hwnd, INT nBar, LPSCROLLINFO info)
/* handle invalid data structure */
if (!SCROLL_ScrollInfoValid(info)
|| !(infoPtr = SCROLL_GetScrollBarInfo(hwnd, nBar)))
|| !(infoPtr = SCROLL_GetInternalInfo(hwnd, nBar, FALSE)))
return FALSE;
/* fill in the desired scroll info structure */
@ -1205,7 +1219,7 @@ static BOOL SCROLL_GetScrollInfo(HWND hwnd, INT nBar, LPSCROLLINFO info)
*/
static INT SCROLL_GetScrollPos(HWND hwnd, INT nBar)
{
LPSCROLLBAR_INFO infoPtr = SCROLL_GetScrollBarInfo(hwnd, nBar);
LPSCROLLBAR_INFO infoPtr = SCROLL_GetInternalInfo(hwnd, nBar, FALSE);
return infoPtr ? infoPtr->curVal: 0;
}
@ -1225,7 +1239,9 @@ static INT SCROLL_GetScrollPos(HWND hwnd, INT nBar)
*/
static BOOL SCROLL_GetScrollRange(HWND hwnd, INT nBar, LPINT lpMin, LPINT lpMax)
{
LPSCROLLBAR_INFO infoPtr = SCROLL_GetScrollBarInfo(hwnd, nBar);
LPSCROLLBAR_INFO infoPtr = SCROLL_GetInternalInfo(hwnd, nBar, FALSE);
if (!infoPtr)
return FALSE;
if (lpMin) *lpMin = infoPtr ? infoPtr->minVal : 0;
if (lpMax) *lpMax = infoPtr ? infoPtr->maxVal : 0;
@ -1246,7 +1262,7 @@ static BOOL SCROLL_GetScrollRange(HWND hwnd, INT nBar, LPINT lpMin, LPINT lpMax)
*/
static BOOL SCROLL_SetScrollRange(HWND hwnd, INT nBar, INT minVal, INT maxVal)
{
LPSCROLLBAR_INFO infoPtr = SCROLL_GetScrollBarInfo(hwnd, nBar);
LPSCROLLBAR_INFO infoPtr = SCROLL_GetInternalInfo(hwnd, nBar, FALSE);
TRACE("hwnd=%p nBar=%d min=%d max=%d\n", hwnd, nBar, minVal, maxVal);
@ -1275,7 +1291,7 @@ static LRESULT WINAPI ScrollBarWndProc( HWND hwnd, UINT message, WPARAM wParam,
case WM_ENABLE:
{
SCROLLBAR_INFO *infoPtr;
if ((infoPtr = SCROLL_GetScrollBarInfo( hwnd, SB_CTL )))
if ((infoPtr = SCROLL_GetInternalInfo( hwnd, SB_CTL, FALSE )))
{
infoPtr->flags = wParam ? ESB_ENABLE_BOTH : ESB_DISABLE_BOTH;
SCROLL_RefreshScrollBar(hwnd, SB_CTL, TRUE, TRUE);
@ -1487,10 +1503,10 @@ static INT SCROLL_SetScrollInfo( HWND hwnd, INT nBar, const SCROLLINFO *info, BO
BOOL bChangeParams = FALSE; /* don't show/hide scrollbar if params don't change */
INT action = 0;
if (!(infoPtr = SCROLL_GetScrollBarInfo(hwnd, nBar))) return 0;
if (info->fMask & ~(SIF_ALL | SIF_DISABLENOSCROLL)) return 0;
if ((info->cbSize != sizeof(*info)) &&
(info->cbSize != sizeof(*info)-sizeof(info->nTrackPos))) return 0;
/* handle invalid data structure */
if (!SCROLL_ScrollInfoValid(info)
|| !(infoPtr = SCROLL_GetInternalInfo(hwnd, nBar, TRUE)))
return 0;
if (TRACE_ON(scroll))
{
@ -1635,7 +1651,8 @@ done:
* nBar [I] One of SB_HORZ, SB_VERT, or SB_CTL
* info [IO] fMask specifies which values to retrieve
*
* RETURNS STD
* RETURNS
* TRUE if SCROLLINFO is filled
*/
BOOL WINAPI GetScrollInfo(HWND hwnd, INT nBar, LPSCROLLINFO info)
{
@ -1676,7 +1693,7 @@ INT WINAPI SetScrollPos( HWND hwnd, INT nBar, INT nPos, BOOL bRedraw)
SCROLLBAR_INFO *infoPtr;
INT oldPos;
if (!(infoPtr = SCROLL_GetScrollBarInfo( hwnd, nBar ))) return 0;
if (!(infoPtr = SCROLL_GetInternalInfo( hwnd, nBar, FALSE ))) return 0;
oldPos = infoPtr->curVal;
info.cbSize = sizeof(info);
info.nPos = nPos;
@ -1717,6 +1734,8 @@ INT WINAPI GetScrollPos(HWND hwnd, INT nBar)
/*************************************************************************
* SetScrollRange (USER32.@)
* The SetScrollRange function sets the minimum and maximum scroll box positions
* If nMinPos and nMaxPos is the same value, the scroll bar will hide
*
* Sets the range of the scroll bar.
*
@ -1734,7 +1753,7 @@ BOOL WINAPI SetScrollRange(HWND hwnd, INT nBar, INT minVal, INT maxVal, BOOL bRe
SCROLLINFO info;
TRACE("hwnd=%p nBar=%d min=%d max=%d, bRedraw=%d\n", hwnd, nBar, minVal, maxVal, bRedraw);
info.cbSize = sizeof(info);
info.fMask = SIF_RANGE;
info.nMin = minVal;
@ -1781,7 +1800,8 @@ INT SCROLL_SetNCSbState(HWND hwnd, int vMin, int vMax, int vPos,
* lpMin [O] Where to store minimum value
* lpMax [O] Where to store maximum value
*
* RETURNS STD
* RETURNS
* TRUE if values is filled
*/
BOOL WINAPI GetScrollRange(HWND hwnd, INT nBar, LPINT lpMin, LPINT lpMax)
{
@ -1877,7 +1897,7 @@ BOOL WINAPI EnableScrollBar( HWND hwnd, INT nBar, UINT flags )
if (nBar == SB_BOTH)
{
if (!(infoPtr = SCROLL_GetScrollBarInfo( hwnd, SB_VERT ))) return FALSE;
if (!(infoPtr = SCROLL_GetInternalInfo( hwnd, SB_VERT, TRUE ))) return FALSE;
if (!(bFineWithMe = (infoPtr->flags == flags)) )
{
infoPtr->flags = flags;
@ -1888,7 +1908,7 @@ BOOL WINAPI EnableScrollBar( HWND hwnd, INT nBar, UINT flags )
else
bFineWithMe = TRUE;
if (!(infoPtr = SCROLL_GetScrollBarInfo( hwnd, nBar ))) return FALSE;
if (!(infoPtr = SCROLL_GetInternalInfo( hwnd, nBar, TRUE ))) return FALSE;
if (bFineWithMe && infoPtr->flags == flags) return FALSE;
infoPtr->flags = flags;