Mikołaj Zalewski : comctl32: header: Make the column resizing smooth in full drag mode.

[Alexandre Julliard]

Module: wine
Branch: refs/heads/master
Commit: 64e5779c16aa364f1bc293874c00b81b11daf1dd
URL:    http://source.winehq.org/git/?p=wine.git;a=commit;h=64e5779c16aa364f1bc293874c00b81b11daf1dd

Author: Mikołaj Zalewski <mikolaj at zalewski.pl>
Date:   Mon May 22 22:47:37 2006 +0200

comctl32: header: Make the column resizing smooth in full drag mode.

Make the column resizing smooth in full drag mode even for listview
with lots of elements by redrawing only the resized column and calling
UpdateWindow.

---

 dlls/comctl32/header.c |   25 ++++++++++++++++++-------
 1 files changed, 18 insertions(+), 7 deletions(-)

diff --git a/dlls/comctl32/header.c b/dlls/comctl32/header.c
index 38d752e..6696e25 100644
--- a/dlls/comctl32/header.c
+++ b/dlls/comctl32/header.c
@@ -1657,14 +1657,25 @@ HEADER_MouseMove (HWND hwnd, WPARAM wPar
 	    if (dwStyle & HDS_FULLDRAG) {
                 if (!HEADER_SendHeaderNotifyT (hwnd, HDN_ITEMCHANGINGW, infoPtr->iMoveItem, HDI_WIDTH, NULL))
 		{
-		nWidth = pt.x - infoPtr->items[infoPtr->iMoveItem].rect.left + infoPtr->xTrackOffset;
-		if (nWidth < 0)
-		  nWidth = 0;
-		infoPtr->items[infoPtr->iMoveItem].cxy = nWidth;
-                        HEADER_SendHeaderNotifyT(hwnd, HDN_ITEMCHANGEDW, infoPtr->iMoveItem, HDI_WIDTH, NULL);
+                    HEADER_ITEM *lpItem = &infoPtr->items[infoPtr->iMoveItem];
+                    INT nOldWidth = lpItem->rect.right - lpItem->rect.left;
+                    RECT rcClient;
+                    RECT rcScroll;
+                    
+                    nWidth = pt.x - lpItem->rect.left + infoPtr->xTrackOffset;
+                    if (nWidth < 0) nWidth = 0;
+                    infoPtr->items[infoPtr->iMoveItem].cxy = nWidth;
+                    HEADER_SetItemBounds(hwnd);
+                    
+                    GetClientRect(hwnd, &rcClient);
+                    rcScroll = rcClient;
+                    rcScroll.left = lpItem->rect.left + nOldWidth;
+                    ScrollWindowEx(hwnd, nWidth - nOldWidth, 0, &rcScroll, &rcClient, NULL, NULL, 0);
+                    InvalidateRect(hwnd, &lpItem->rect, FALSE);
+                    UpdateWindow(hwnd);
+                    
+                    HEADER_SendHeaderNotifyT(hwnd, HDN_ITEMCHANGEDW, infoPtr->iMoveItem, HDI_WIDTH, NULL);
 		}
-		HEADER_SetItemBounds (hwnd);
-		InvalidateRect(hwnd, NULL, FALSE);
 	    }
 	    else {
 		hdc = GetDC (hwnd);