Listview R3
Dimitrie O. Paun
dpaun at rogers.com
Wed Oct 16 00:15:01 CDT 2002
This one is nice, as it gets rid of some annoying flicker.
I am very interested if it breaks repainting for anyone.
ChangeLog
Instrument SetItemT to avoid repainting if nothing changed
Teach RemoveAllSelections to skip an item, so we can
eliminate the flicker when we click on a selected item.
--- dlls/comctl32/listview.c.R2 Wed Oct 16 00:37:09 2002
+++ dlls/comctl32/listview.c Wed Oct 16 01:08:47 2002
@@ -2365,12 +2365,13 @@
*
* Parameters(s):
* [I] infoPtr : valid pointer to the listview structure
+* [I] nSkipItem : item to skip removing the selection
*
* RETURNS:
* SUCCESS : TRUE
* FAILURE : TRUE
*/
-static LRESULT LISTVIEW_RemoveAllSelections(LISTVIEW_INFO *infoPtr)
+static LRESULT LISTVIEW_RemoveAllSelections(LISTVIEW_INFO *infoPtr, INT nSkipItem)
{
LVITEMW lvItem;
RANGE *sel;
@@ -2389,8 +2390,10 @@
{
sel = DPA_GetPtr(infoPtr->hdpaSelectionRanges, 0);
if (!sel) continue;
- for(i = sel->lower; i <= sel->upper; i++)
- LISTVIEW_SetItemState(infoPtr, i, &lvItem);
+ if (infoPtr->hdpaSelectionRanges->nItemCount == 1 &&
+ sel->lower == nSkipItem && sel->upper == nSkipItem) break;
+ for(i = sel->lower; i <= sel->upper; i++)
+ if (i != nSkipItem) LISTVIEW_SetItemState(infoPtr, i, &lvItem);
}
while (infoPtr->hdpaSelectionRanges->nItemCount > 0);
@@ -2558,7 +2561,7 @@
POINT ptItem;
RECT rcSel;
- LISTVIEW_RemoveAllSelections(infoPtr);
+ LISTVIEW_RemoveAllSelections(infoPtr, -1);
item.state = LVIS_SELECTED;
item.stateMask = LVIS_SELECTED;
@@ -2617,7 +2620,7 @@
TRACE("nItem=%d\n", nItem);
- LISTVIEW_RemoveAllSelections(infoPtr);
+ LISTVIEW_RemoveAllSelections(infoPtr, nItem);
lvItem.state = LVIS_FOCUSED | LVIS_SELECTED;
lvItem.stateMask = LVIS_FOCUSED | LVIS_SELECTED;
@@ -2764,12 +2767,13 @@
* [I] infoPtr : valid pointer to the listview structure
* [I] lpLVItem : valid pointer to new item atttributes
* [I] isW : TRUE if lpLVItem is Unicode, FALSE if it's ANSI
+ * [O] bChanged : will be set to TRUE if the item really changed
*
* RETURN:
* SUCCESS : TRUE
* FAILURE : FALSE
*/
-static BOOL set_owner_item(LISTVIEW_INFO *infoPtr, LPLVITEMW lpLVItem, BOOL isW)
+static BOOL set_owner_item(LISTVIEW_INFO *infoPtr, LPLVITEMW lpLVItem, BOOL isW, BOOL *bChanged)
{
LONG lStyle = infoPtr->dwStyle;
NMLISTVIEW nmlv;
@@ -2786,6 +2790,8 @@
if ( !((oldState ^ lpLVItem->state) & lpLVItem->stateMask &
~infoPtr->uCallbackMask & (LVIS_FOCUSED | LVIS_SELECTED))) return TRUE;
+ *bChanged = TRUE;
+
/*
* As per MSDN LVN_ITEMCHANGING notifications are _NOT_ sent for
* by LVS_OWERNDATA list controls
@@ -2807,7 +2813,7 @@
if (lpLVItem->state & LVIS_SELECTED)
{
- if (lStyle & LVS_SINGLESEL) LISTVIEW_RemoveAllSelections(infoPtr);
+ if (lStyle & LVS_SINGLESEL) LISTVIEW_RemoveAllSelections(infoPtr, lpLVItem->iItem);
ranges_add(infoPtr->hdpaSelectionRanges, range);
}
else
@@ -2833,18 +2839,19 @@
* [I] infoPtr : valid pointer to the listview structure
* [I] lpLVItem : valid pointer to new item atttributes
* [I] isW : TRUE if lpLVItem is Unicode, FALSE if it's ANSI
+ * [O] bChanged : will be set to TRUE if the item really changed
*
* RETURN:
* SUCCESS : TRUE
* FAILURE : FALSE
*/
-static BOOL set_main_item(LISTVIEW_INFO *infoPtr, LPLVITEMW lpLVItem, BOOL isW)
+static BOOL set_main_item(LISTVIEW_INFO *infoPtr, LPLVITEMW lpLVItem, BOOL isW, BOOL *bChanged)
{
LONG lStyle = infoPtr->dwStyle;
HDPA hdpaSubItems;
LISTVIEW_ITEM *lpItem;
NMLISTVIEW nmlv;
- UINT uChanged = 0;
+ UINT uChanged = 0, oldState;
hdpaSubItems = (HDPA)DPA_GetPtr(infoPtr->hdpaItems, lpLVItem->iItem);
if (!hdpaSubItems && hdpaSubItems != (HDPA)-1) return FALSE;
@@ -2853,22 +2860,11 @@
if (!lpItem) return FALSE;
/* we need to handle the focus, and selection differently */
- lpItem->state &= ~(LVIS_FOCUSED | LVIS_SELECTED);
- if (~infoPtr->uCallbackMask & LVIS_FOCUSED)
- {
- if (lpLVItem->iItem == infoPtr->nFocusedItem)
- lpItem->state |= LVIS_FOCUSED;
- }
- if (~infoPtr->uCallbackMask & LVIS_SELECTED)
- {
- if (ranges_contain(infoPtr->hdpaSelectionRanges, lpLVItem->iItem))
- lpItem->state |= LVIS_SELECTED;
- }
+ oldState = LISTVIEW_GetItemState(infoPtr, lpLVItem->iItem, LVIS_FOCUSED | LVIS_SELECTED);
TRACE("lpItem->state=0x%x\n", lpItem->state);
/* determine what fields will change */
- if ((lpLVItem->mask & LVIF_STATE) &&
- ((lpItem->state ^ lpLVItem->state) & lpLVItem->stateMask & ~infoPtr->uCallbackMask))
+ if ((lpLVItem->mask & LVIF_STATE) && ((oldState ^ lpLVItem->state) & lpLVItem->stateMask & ~infoPtr->uCallbackMask))
uChanged |= LVIF_STATE;
if ((lpLVItem->mask & LVIF_IMAGE) && (lpItem->hdr.iImage != lpLVItem->iImage))
@@ -2885,6 +2881,7 @@
TRACE("uChanged=0x%x\n", uChanged);
if (!uChanged) return TRUE;
+ *bChanged = TRUE;
ZeroMemory(&nmlv, sizeof(NMLISTVIEW));
nmlv.iItem = lpLVItem->iItem;
@@ -2918,7 +2915,7 @@
lpItem->state |= (lpLVItem->state & lpLVItem->stateMask);
if (lpLVItem->state & lpLVItem->stateMask & ~infoPtr->uCallbackMask & LVIS_SELECTED)
{
- if (lStyle & LVS_SINGLESEL) LISTVIEW_RemoveAllSelections(infoPtr);
+ if (lStyle & LVS_SINGLESEL) LISTVIEW_RemoveAllSelections(infoPtr, lpLVItem->iItem);
ranges_add(infoPtr->hdpaSelectionRanges, range);
}
else if (lpLVItem->stateMask & LVIS_SELECTED)
@@ -2955,17 +2952,16 @@
* [I] infoPtr : valid pointer to the listview structure
* [I] lpLVItem : valid pointer to new subitem atttributes
* [I] isW : TRUE if lpLVItem is Unicode, FALSE if it's ANSI
+ * [O] bChanged : will be set to TRUE if the item really changed
*
* RETURN:
* SUCCESS : TRUE
* FAILURE : FALSE
*/
-static BOOL set_sub_item(LISTVIEW_INFO *infoPtr, LPLVITEMW lpLVItem, BOOL isW)
+static BOOL set_sub_item(LISTVIEW_INFO *infoPtr, LPLVITEMW lpLVItem, BOOL isW, BOOL *bChanged)
{
- UINT uView = infoPtr->dwStyle & LVS_TYPEMASK;
HDPA hdpaSubItems;
LISTVIEW_SUBITEM *lpSubItem;
- BOOL bModified = FALSE;
/* set subitem only if column is present */
if (Header_GetItemCount(infoPtr->hwndHeader) <= lpLVItem->iSubItem)
@@ -2999,26 +2995,23 @@
return FALSE;
}
lpSubItem->iSubItem = lpLVItem->iSubItem;
- bModified = TRUE;
+ *bChanged = TRUE;
}
if (lpLVItem->mask & LVIF_IMAGE)
if (lpSubItem->hdr.iImage != lpLVItem->iImage)
{
lpSubItem->hdr.iImage = lpLVItem->iImage;
- bModified = TRUE;
+ *bChanged = TRUE;
}
if (lpLVItem->mask & LVIF_TEXT)
if (lpSubItem->hdr.pszText != lpLVItem->pszText)
{
textsetptrT(&lpSubItem->hdr.pszText, lpLVItem->pszText, isW);
- bModified = TRUE;
+ *bChanged = TRUE;
}
- if (bModified && !infoPtr->bIsDrawing && uView == LVS_REPORT)
- LISTVIEW_InvalidateSubItem(infoPtr, lpLVItem->iItem, lpLVItem->iSubItem);
-
return TRUE;
}
@@ -3037,9 +3030,10 @@
*/
static BOOL LISTVIEW_SetItemT(LISTVIEW_INFO *infoPtr, LPLVITEMW lpLVItem, BOOL isW)
{
+ UINT uView = infoPtr->dwStyle & LVS_TYPEMASK;
INT nOldFocus = infoPtr->nFocusedItem;
LPWSTR pszText = NULL;
- BOOL bResult;
+ BOOL bResult, bChanged = FALSE;
TRACE("(lpLVItem=%s, isW=%d)\n", debuglvitem_t(lpLVItem, isW), isW);
@@ -3055,28 +3049,27 @@
/* actually set the fields */
if (infoPtr->dwStyle & LVS_OWNERDATA)
- bResult = set_owner_item(infoPtr, lpLVItem, TRUE);
+ bResult = set_owner_item(infoPtr, lpLVItem, TRUE, &bChanged);
else
{
/* sanity checks first */
if (!is_assignable_item(lpLVItem, infoPtr->dwStyle)) return FALSE;
if (lpLVItem->iSubItem)
- bResult = set_sub_item(infoPtr, lpLVItem, TRUE);
+ bResult = set_sub_item(infoPtr, lpLVItem, TRUE, &bChanged);
else
- bResult = set_main_item(infoPtr, lpLVItem, TRUE);
+ bResult = set_main_item(infoPtr, lpLVItem, TRUE, &bChanged);
}
/* redraw item, if necessary */
- if (bResult && !infoPtr->bIsDrawing && lpLVItem->iSubItem == 0)
+ if (bChanged && !infoPtr->bIsDrawing)
{
if (nOldFocus != infoPtr->nFocusedItem && infoPtr->bFocus)
LISTVIEW_InvalidateRect(infoPtr, &infoPtr->rcFocus);
/* this little optimization eliminates some nasty flicker */
- if ( (infoPtr->dwStyle & LVS_TYPEMASK) == LVS_REPORT &&
- !(infoPtr->dwLvExStyle & LVS_EX_FULLROWSELECT) &&
- !(infoPtr->dwStyle & LVS_OWNERDRAWFIXED))
+ if ( uView == LVS_REPORT && !(infoPtr->dwStyle & LVS_OWNERDRAWFIXED) &&
+ (!(infoPtr->dwLvExStyle & LVS_EX_FULLROWSELECT) || lpLVItem->iSubItem) )
LISTVIEW_InvalidateSubItem(infoPtr, lpLVItem->iItem, lpLVItem->iSubItem);
else
LISTVIEW_InvalidateItem(infoPtr, lpLVItem->iItem);
@@ -3661,7 +3654,7 @@
TRACE("()\n");
- LISTVIEW_RemoveAllSelections(infoPtr);
+ LISTVIEW_RemoveAllSelections(infoPtr, -1);
infoPtr->nSelectionMark=-1;
infoPtr->nFocusedItem=-1;
SetRectEmpty(&infoPtr->rcFocus);
@@ -6454,7 +6447,7 @@
: "",
(dwFlags & LVSICF_NOSCROLL) ? "LVSICF_NOSCROLL" : "");
- LISTVIEW_RemoveAllSelections(infoPtr);
+ LISTVIEW_RemoveAllSelections(infoPtr, -1);
precount = infoPtr->nItemCount;
topvisible = LISTVIEW_GetTopIndex(infoPtr) +
@@ -7479,7 +7472,7 @@
else
{
/* remove all selections */
- LISTVIEW_RemoveAllSelections(infoPtr);
+ LISTVIEW_RemoveAllSelections(infoPtr, -1);
}
return 0;
@@ -7753,7 +7746,7 @@
}
else
{
- LISTVIEW_RemoveAllSelections(infoPtr);
+ LISTVIEW_RemoveAllSelections(infoPtr, -1);
}
return 0;
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