[PATCH 0/1] MR1878: comctl32/listview: Draw border and background separately in WM_NCPAINT.

[Vladislav Timonin (＠vt)]

Depending on the theme, if there was a header,
the border ends up painted lower than it should be,
and clipped by the header.

7-Zip file manager, the reason why the offset was added in 5f0dcf79185941c4faff35d1cc9c758160f3a27d in the first place, still renders correctly.

Before:

![before](/uploads/8321f45c657469278b2787edfa147b20/before.png)

After:

![after](/uploads/013241f4cd3b893c7f4073b6a9fe8119/after.png)

[PATCH 1/1] comctl32/listview: Draw border and background separately in WM_NCPAINT.

[Vladislav Timonin]

From: Vladislav Timonin

Depending on the theme, if there was a header,
the border ends up painted lower than it should be,
and clipped by the header.
---
 dlls/comctl32/listview.c | 18 +++++++++++++-----
 1 file changed, 13 insertions(+), 5 deletions(-)

diff --git a/dlls/comctl32/listview.c b/dlls/comctl32/listview.c
index 7c394d60273..13df8567c56 100644
--- a/dlls/comctl32/listview.c
+++ b/dlls/comctl32/listview.c
@@ -10701,6 +10701,7 @@ static LRESULT LISTVIEW_NCPaint(const LISTVIEW_INFO *infoPtr, HRGN region)
     HRGN cliprgn;
     int cxEdge = GetSystemMetrics (SM_CXEDGE),
         cyEdge = GetSystemMetrics (SM_CYEDGE);
+    DTBGOPTS dtbg_opts;

if (!theme || !(exstyle & WS_EX_CLIENTEDGE))
        return DefWindowProcW (infoPtr->hwndSelf, WM_NCPAINT, (WPARAM)region, 0);
@@ -10713,17 +10714,24 @@ static LRESULT LISTVIEW_NCPaint(const LISTVIEW_INFO *infoPtr, HRGN region)
         CombineRgn (cliprgn, cliprgn, region, RGN_AND);

OffsetRect(&r, -r.left, -r.top);
+
+    dc = GetDCEx(infoPtr->hwndSelf, region, DCX_WINDOW|DCX_INTERSECTRGN);
+
+    if (IsThemeBackgroundPartiallyTransparent (theme, 0, 0))
+        DrawThemeParentBackground(infoPtr->hwndSelf, dc, &r);
+
+    dtbg_opts.dwSize = sizeof(DTBGOPTS);
+    dtbg_opts.dwFlags = DTBG_OMITCONTENT;
+    DrawThemeBackgroundEx(theme, dc, 0, 0, &r, &dtbg_opts);
+
     if (infoPtr->hwndHeader && LISTVIEW_IsHeaderEnabled(infoPtr))
     {
         GetWindowRect(infoPtr->hwndHeader, &window_rect);
         r.top = min(r.bottom, r.top + window_rect.bottom - window_rect.top);
     }
+    dtbg_opts.dwFlags = DTBG_OMITBORDER;
+    DrawThemeBackgroundEx(theme, dc, 0, 0, &r, &dtbg_opts);

-    dc = GetDCEx(infoPtr->hwndSelf, region, DCX_WINDOW|DCX_INTERSECTRGN);
-
-    if (IsThemeBackgroundPartiallyTransparent (theme, 0, 0))
-        DrawThemeParentBackground(infoPtr->hwndSelf, dc, &r);
-    DrawThemeBackground (theme, dc, 0, 0, &r, 0);
     ReleaseDC(infoPtr->hwndSelf, dc);

/* Call default proc to get the scrollbars etc. painted */