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Rewrite of the SetItemCount: bugs got squashed, 

LVSICF_{NOSCROLL,NOINVALIDATEALL} implemented.
This commit is contained in:
Dimitrie O. Paun 2002-10-28 20:33:18 +00:00 committed by Alexandre Julliard
parent 7710b3c8f3
commit 28a2f193a3
1 changed files with 65 additions and 33 deletions
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98
dlls/comctl32/listview.c
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@ -53,7 +53,6 @@
* -- LISTVIEW_StyleChanged doesn't handle some changes too well
*
* Speedups
* -- LISTVIEW_SetItemCount is too invalidation happy
* -- LISTVIEW_Size invalidates too much
* -- in sorted mode, LISTVIEW_InsertItemT sorts the array,
* instead of inserting in the right spot
@ -6521,46 +6520,79 @@ static HIMAGELIST LISTVIEW_SetImageList(LISTVIEW_INFO *infoPtr, INT nType, HIMAG
*/
static BOOL LISTVIEW_SetItemCount(LISTVIEW_INFO *infoPtr, INT nItems, DWORD dwFlags)
{
TRACE("(nItems=%d, dwFlags=%lx)\n", nItems, dwFlags);
TRACE("(nItems=%d, dwFlags=%lx)\n", nItems, dwFlags);
if (infoPtr->dwStyle & LVS_OWNERDATA)
{
int precount,topvisible;
if (infoPtr->dwStyle & LVS_OWNERDATA)
{
UINT uView = infoPtr->dwStyle & LVS_TYPEMASK;
INT nOldCount = infoPtr->nItemCount;
TRACE("LVS_OWNERDATA is set!\n");
if (dwFlags & (LVSICF_NOINVALIDATEALL | LVSICF_NOSCROLL))
FIXME("flags %s %s not implemented\n",
(dwFlags & LVSICF_NOINVALIDATEALL) ? "LVSICF_NOINVALIDATEALL"
: "",
(dwFlags & LVSICF_NOSCROLL) ? "LVSICF_NOSCROLL" : "");
LISTVIEW_DeselectAll(infoPtr);
infoPtr->nItemCount = nItems;
LISTVIEW_UpdateScroll(infoPtr);
LISTVIEW_DeselectAll(infoPtr);
/* the flags are valid only in ownerdata report and list modes */
if (uView == LVS_ICON || uView == LVS_SMALLICON) dwFlags = 0;
precount = infoPtr->nItemCount;
topvisible = LISTVIEW_GetTopIndex(infoPtr) +
LISTVIEW_GetCountPerColumn(infoPtr) + 1;
if (!(dwFlags & LVSICF_NOSCROLL))
LISTVIEW_EnsureVisible(infoPtr, nItems - 1, FALSE);
infoPtr->nItemCount = nItems;
LISTVIEW_UpdateItemSize(infoPtr);
if (!(dwFlags & LVSICF_NOINVALIDATEALL))
LISTVIEW_InvalidateList(infoPtr);
else
{
INT nFrom, nTo;
POINT Origin;
RECT rcErase;
LISTVIEW_GetOrigin(infoPtr, &Origin);
nFrom = min(nOldCount, nItems);
nTo = max(nOldCount, nItems);
if (uView == LVS_REPORT)
{
rcErase.left = 0;
rcErase.top = nFrom * infoPtr->nItemHeight;
rcErase.right = infoPtr->nItemWidth;
rcErase.bottom = nTo * infoPtr->nItemHeight;
OffsetRect(&rcErase, Origin.x, Origin.y);
if (IntersectRect(&rcErase, &rcErase, &infoPtr->rcList))
LISTVIEW_InvalidateRect(infoPtr, &rcErase);
}
else /* LVS_LIST */
{
INT nPerCol = LISTVIEW_GetCountPerColumn(infoPtr);
LISTVIEW_UpdateSize(infoPtr);
LISTVIEW_UpdateScroll(infoPtr);
rcErase.left = (nFrom / nPerCol) * infoPtr->nItemWidth;
rcErase.top = (nFrom % nPerCol) * infoPtr->nItemHeight;
rcErase.right = rcErase.left + infoPtr->nItemWidth;
rcErase.bottom = nPerCol * infoPtr->nItemHeight;
OffsetRect(&rcErase, Origin.x, Origin.y);
if (IntersectRect(&rcErase, &rcErase, &infoPtr->rcList))
LISTVIEW_InvalidateRect(infoPtr, &rcErase);
if (min(precount,infoPtr->nItemCount) < topvisible)
LISTVIEW_InvalidateList(infoPtr); /* FIXME: optimize */
}
else
{
/* According to MSDN for non-LVS_OWNERDATA this is just
* a performance issue. The control allocates its internal
* data structures for the number of items specified. It
* cuts down on the number of memory allocations. Therefore
* we will just issue a WARN here
*/
WARN("for non-ownerdata performance option not implemented.\n");
}
rcErase.left = (nFrom / nPerCol + 1) * infoPtr->nItemWidth;
rcErase.top = 0;
rcErase.right = (nTo / nPerCol + 1) * infoPtr->nItemWidth;
rcErase.bottom = nPerCol * infoPtr->nItemHeight;
OffsetRect(&rcErase, Origin.x, Origin.y);
if (IntersectRect(&rcErase, &rcErase, &infoPtr->rcList))
LISTVIEW_InvalidateRect(infoPtr, &rcErase);
}
}
}
else
{
/* According to MSDN for non-LVS_OWNERDATA this is just
* a performance issue. The control allocates its internal
* data structures for the number of items specified. It
* cuts down on the number of memory allocations. Therefore
* we will just issue a WARN here
*/
WARN("for non-ownerdata performance option not implemented.\n");
}
return TRUE;
return TRUE;
}
/***