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Rewrite the UpdateScroll function: simpler, faster. 

Add debugging helper for SCROLLINFO.
Fix potential bug in debugging helpers.
This commit is contained in:
Dimitrie O. Paun 2002-10-25 03:14:06 +00:00 committed by Alexandre Julliard
parent 9faec8a877
commit c4e45d7f94
1 changed files with 79 additions and 89 deletions
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168
dlls/comctl32/listview.c
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@ -549,6 +549,38 @@ static inline char* debugrect(const RECT* rect)
} else return "(null)"; } else return "(null)";
} }
static char * debugscrollinfo(const SCROLLINFO *pScrollInfo)
{
char* buf = debug_getbuf(), *text = buf;
int len, size = DEBUG_BUFFER_SIZE;
if (pScrollInfo == NULL) return "(null)";
len = snprintf(buf, size, "{cbSize=%d, ", pScrollInfo->cbSize);
if (len == -1) goto end; buf += len; size -= len;
if (pScrollInfo->fMask & SIF_RANGE)
len = snprintf(buf, size, "nMin=%d, nMax=%d, ", pScrollInfo->nMin, pScrollInfo->nMax);
else len = 0;
if (len == -1) goto end; buf += len; size -= len;
if (pScrollInfo->fMask & SIF_PAGE)
len = snprintf(buf, size, "nPage=%u, ", pScrollInfo->nPage);
else len = 0;
if (len == -1) goto end; buf += len; size -= len;
if (pScrollInfo->fMask & SIF_POS)
len = snprintf(buf, size, "nPos=%d, ", pScrollInfo->nPos);
else len = 0;
if (len == -1) goto end; buf += len; size -= len;
if (pScrollInfo->fMask & SIF_TRACKPOS)
len = snprintf(buf, size, "nTrackPos=%d, ", pScrollInfo->nTrackPos);
else len = 0;
if (len == -1) goto end; buf += len; size -= len;
goto undo;
end:
buf = text + strlen(text);
undo:
if (buf - text > 2) { buf[-2] = '}'; buf[-1] = 0; }
return text;
}
static char* debugnmlistview(LPNMLISTVIEW plvnm) static char* debugnmlistview(LPNMLISTVIEW plvnm)
{ {
if (plvnm) if (plvnm)
@ -594,7 +626,7 @@ static char* debuglvitem_t(LPLVITEMW lpLVItem, BOOL isW)
end: end:
buf = text + strlen(text); buf = text + strlen(text);
undo: undo:
if (buf - text > 2) buf[-2] = '}'; buf[-1] = 0; if (buf - text > 2) { buf[-2] = '}'; buf[-1] = 0; }
return text; return text;
} }
@ -634,7 +666,7 @@ static char* debuglvcolumn_t(LPLVCOLUMNW lpColumn, BOOL isW)
end: end:
buf = text + strlen(text); buf = text + strlen(text);
undo: undo:
if (buf - text > 2) buf[-2] = '}'; buf[-1] = 0; if (buf - text > 2) { buf[-2] = '}'; buf[-1] = 0; }
return text; return text;
} }
@ -1423,103 +1455,61 @@ static void LISTVIEW_UpdateHeaderSize(LISTVIEW_INFO *infoPtr, INT nNewScrollPos)
*/ */
static void LISTVIEW_UpdateScroll(LISTVIEW_INFO *infoPtr) static void LISTVIEW_UpdateScroll(LISTVIEW_INFO *infoPtr)
{ {
UINT uView = infoPtr->dwStyle & LVS_TYPEMASK; UINT uView = infoPtr->dwStyle & LVS_TYPEMASK;
INT nListHeight = infoPtr->rcList.bottom - infoPtr->rcList.top; SCROLLINFO horzInfo, vertInfo;
INT nListWidth = infoPtr->rcList.right - infoPtr->rcList.left;
SCROLLINFO scrollInfo;
if (infoPtr->dwStyle & LVS_NOSCROLL) return; if (infoPtr->dwStyle & LVS_NOSCROLL) return;
/*if (!is_redrawing(infoPtr)) return;*/ /*if (!is_redrawing(infoPtr)) return;*/
scrollInfo.cbSize = sizeof(SCROLLINFO); ZeroMemory(&horzInfo, sizeof(SCROLLINFO));
horzInfo.cbSize = sizeof(SCROLLINFO);
horzInfo.nPage = infoPtr->rcList.right - infoPtr->rcList.left;
if (uView == LVS_LIST) ZeroMemory(&vertInfo, sizeof(SCROLLINFO));
{ vertInfo.cbSize = sizeof(SCROLLINFO);
/* update horizontal scrollbar */ vertInfo.nPage = infoPtr->rcList.bottom - infoPtr->rcList.top;
INT nCountPerColumn = LISTVIEW_GetCountPerColumn(infoPtr);
INT nCountPerRow = LISTVIEW_GetCountPerRow(infoPtr);
TRACE("items=%d, perColumn=%d, perRow=%d\n", /* for now, we'll set info.nMax to the _count_, and adjust it later */
infoPtr->nItemCount, nCountPerColumn, nCountPerRow); if (uView == LVS_LIST)
{
scrollInfo.nMin = 0; INT nPerCol = LISTVIEW_GetCountPerColumn(infoPtr);
scrollInfo.nMax = infoPtr->nItemCount / nCountPerColumn; horzInfo.nMax = (infoPtr->nItemCount + nPerCol - 1) / nPerCol;
if((infoPtr->nItemCount % nCountPerColumn) == 0) horzInfo.nPage /= infoPtr->nItemWidth;
scrollInfo.nMax--; }
if (scrollInfo.nMax < 0) scrollInfo.nMax = 0; else if (uView == LVS_REPORT)
scrollInfo.nPos = ListView_GetTopIndex(infoPtr->hwndSelf) / nCountPerColumn; {
scrollInfo.nPage = nCountPerRow; horzInfo.nMax = infoPtr->nItemWidth;
scrollInfo.fMask = SIF_RANGE | SIF_POS | SIF_PAGE; vertInfo.nMax = infoPtr->nItemCount;
SetScrollInfo(infoPtr->hwndSelf, SB_HORZ, &scrollInfo, TRUE); vertInfo.nPage /= infoPtr->nItemHeight;
ShowScrollBar(infoPtr->hwndSelf, SB_VERT, FALSE); }
} else /* LVS_ICON, or LVS_SMALLICON */
else if (uView == LVS_REPORT) {
{ RECT rcView;
BOOL test;
/* update vertical scrollbar */ if (LISTVIEW_GetViewRect(infoPtr, &rcView))
scrollInfo.nMin = 0; {
scrollInfo.nMax = infoPtr->nItemCount - 1; horzInfo.nMax = rcView.right - rcView.left;
scrollInfo.nPos = ListView_GetTopIndex(infoPtr->hwndSelf); vertInfo.nMax = rcView.bottom - rcView.top;
scrollInfo.nPage = LISTVIEW_GetCountPerColumn(infoPtr); }
scrollInfo.fMask = SIF_RANGE | SIF_POS | SIF_PAGE; }
test = (scrollInfo.nMin >= scrollInfo.nMax - max((INT)scrollInfo.nPage - 1, 0));
TRACE("LVS_REPORT Vert. nMax=%d, nPage=%d, test=%d\n", horzInfo.fMask = SIF_RANGE | SIF_PAGE;
scrollInfo.nMax, scrollInfo.nPage, test); horzInfo.nMax = max(horzInfo.nMax - 1, 0);
SetScrollInfo(infoPtr->hwndSelf, SB_VERT, &scrollInfo, TRUE); SetScrollInfo(infoPtr->hwndSelf, SB_HORZ, &horzInfo, TRUE);
ShowScrollBar(infoPtr->hwndSelf, SB_VERT, (test) ? FALSE : TRUE); TRACE("horzInfo=%s\n", debugscrollinfo(&horzInfo));
/* update horizontal scrollbar */ vertInfo.fMask = SIF_RANGE | SIF_PAGE;
scrollInfo.fMask = SIF_POS; vertInfo.nMax = max(vertInfo.nMax - 1, 0);
if (!GetScrollInfo(infoPtr->hwndSelf, SB_HORZ, &scrollInfo)) SetScrollInfo(infoPtr->hwndSelf, SB_VERT, &vertInfo, TRUE);
scrollInfo.nPos = 0; TRACE("vertInfo=%s\n", debugscrollinfo(&vertInfo));
scrollInfo.nMin = 0;
scrollInfo.nMax = max(infoPtr->nItemWidth, 0)-1;
scrollInfo.nPage = nListWidth;
scrollInfo.fMask = SIF_RANGE | SIF_POS | SIF_PAGE ;
test = (scrollInfo.nMin >= scrollInfo.nMax - max((INT)scrollInfo.nPage - 1, 0));
TRACE("LVS_REPORT Horz. nMax=%d, nPage=%d, test=%d\n",
scrollInfo.nMax, scrollInfo.nPage, test);
SetScrollInfo(infoPtr->hwndSelf, SB_HORZ, &scrollInfo, TRUE);
ShowScrollBar(infoPtr->hwndSelf, SB_HORZ, (test) ? FALSE : TRUE);
/* Update the Header Control */ /* Update the Header Control */
scrollInfo.fMask = SIF_POS; if (uView == LVS_REPORT)
GetScrollInfo(infoPtr->hwndSelf, SB_HORZ, &scrollInfo);
LISTVIEW_UpdateHeaderSize(infoPtr, scrollInfo.nPos);
}
else
{
RECT rcView;
if (LISTVIEW_GetViewRect(infoPtr, &rcView))
{ {
TRACE("rcView=%s, rcList=%s\n", debugrect(&rcView), debugrect(&infoPtr->rcList)); horzInfo.fMask = SIF_POS;
GetScrollInfo(infoPtr->hwndSelf, SB_HORZ, &horzInfo);
/* Update Horizontal Scrollbar */ LISTVIEW_UpdateHeaderSize(infoPtr, horzInfo.nPos);
scrollInfo.fMask = SIF_POS;
if (!GetScrollInfo(infoPtr->hwndSelf, SB_HORZ, &scrollInfo))
scrollInfo.nPos = 0;
scrollInfo.nMin = 0;
scrollInfo.nMax = max(rcView.right - rcView.left - 1, 0);
scrollInfo.nPage = nListWidth;
scrollInfo.fMask = SIF_RANGE | SIF_POS | SIF_PAGE;
TRACE("LVS_ICON/SMALLICON Horz.\n");
SetScrollInfo(infoPtr->hwndSelf, SB_HORZ, &scrollInfo, TRUE);
/* Update Vertical Scrollbar */
scrollInfo.fMask = SIF_POS;
if (!GetScrollInfo(infoPtr->hwndSelf, SB_VERT, &scrollInfo))
scrollInfo.nPos = 0;
scrollInfo.nMin = 0;
scrollInfo.nMax = max(rcView.bottom - rcView.top - 1, 0);
scrollInfo.nPage = nListHeight;
scrollInfo.fMask = SIF_RANGE | SIF_POS | SIF_PAGE;
TRACE("LVS_ICON/SMALLICON Vert.\n");
SetScrollInfo(infoPtr->hwndSelf, SB_VERT, &scrollInfo, TRUE);
} }
}
} }