Signed-off-by: Gabriel Ivăncescu <gabrielopcode(a)gmail.com>
---
This has been carefully done so that it matches the previous behavior when
LBS_NODATA was used, since SetCount only works with it (so that means it
also implies LBS_OWNERDRAWFIXED and so on).
count was changed to unsigned so that it passes the last test in the patch
series, apparently Windows treats it as unsigned.
dlls/comctl32/listbox.c | 45 +++++++++++++++++++++++++++++++----------
1 file changed, 34 insertions(+), 11 deletions(-)
diff --git a/dlls/comctl32/listbox.c b/dlls/comctl32/listbox.c
index c92c2a2..787fc88 100644
--- a/dlls/comctl32/listbox.c
+++ b/dlls/comctl32/listbox.c
@@ -1742,24 +1742,47 @@ static void LISTBOX_ResetContent( LB_DESCR *descr )
/***********************************************************************
* LISTBOX_SetCount
*/
-static LRESULT LISTBOX_SetCount( LB_DESCR *descr, INT count )
+static LRESULT LISTBOX_SetCount( LB_DESCR *descr, UINT count )
{
- LRESULT ret;
+ UINT orig_num = descr->nb_items;
if (!(descr->style & LBS_NODATA)) return LB_ERR;
- /* FIXME: this is far from optimal... */
- if (count > descr->nb_items)
+ if (count > orig_num)
{
- while (count > descr->nb_items)
- if ((ret = LISTBOX_InsertString( descr, -1, 0 )) < 0)
- return ret;
+ if (!resize_storage(descr, count))
+ return LB_ERRSPACE;
+ memset(&descr->items[orig_num], 0, (count - orig_num) * sizeof(LB_ITEMDATA));
+ descr->nb_items = count;
+
+ LISTBOX_UpdateScroll(descr);
+ LISTBOX_InvalidateItems(descr, orig_num);
+
+ /* If listbox was empty, set focus to the first item */
+ if (orig_num == 0) LISTBOX_SetCaretIndex(descr, 0, FALSE);
}
- else if (count < descr->nb_items)
+ else if (count < orig_num)
{
- while (count < descr->nb_items)
- if ((ret = LISTBOX_RemoveItem( descr, (descr->nb_items - 1) )) < 0)
- return ret;
+ LISTBOX_InvalidateItems(descr, count);
+ descr->nb_items = count;
+
+ if (count == 0) SendMessageW(descr->self, LB_RESETCONTENT, 0, 0);
+ else
+ {
+ descr->anchor_item = min(descr->anchor_item, count - 1);
+
+ resize_storage(descr, count);
+ if (descr->selected_item >= count)
+ descr->selected_item = -1;
+
+ LISTBOX_UpdateScroll(descr);
+
+ /* If we removed the scrollbar, reset the top of the list */
+ if (count <= descr->page_size && orig_num > descr->page_size)
+ LISTBOX_SetTopItem(descr, 0, TRUE);
+
+ descr->focus_item = min(descr->focus_item, count - 1);
+ }
}
InvalidateRect( descr->self, NULL, TRUE );
--
2.19.1