From 0e0f62f2fad14144396599bde4537dcb43a30ee2 Mon Sep 17 00:00:00 2001
From: Alexandre Julliard <julliard@winehq.org>
Date: Thu, 24 Feb 2005 19:42:08 +0000
Subject: [PATCH] Repaint the non-client area to work around broken WM_PAINT
 handlers also when doing a synchronous update with RDW_UPDATENOW.

---
 dlls/user/painting.c | 20 ++++++++++++++++++--
 1 file changed, 18 insertions(+), 2 deletions(-)

diff --git a/dlls/user/painting.c b/dlls/user/painting.c
index 17bb6ec624a..ff9b309f062 100644
--- a/dlls/user/painting.c
+++ b/dlls/user/painting.c
@@ -326,7 +326,7 @@ static void erase_now( HWND hwnd, UINT rdw_flags )
  */
 static void update_now( HWND hwnd, UINT rdw_flags )
 {
-    HWND child;
+    HWND prev = 0, child;
 
     /* desktop window never gets WM_PAINT, only WM_ERASEBKGND */
     if (hwnd == GetDesktopWindow()) erase_now( hwnd, rdw_flags | RDW_NOCHILDREN );
@@ -342,8 +342,24 @@ static void update_now( HWND hwnd, UINT rdw_flags )
         if (!get_update_flags( hwnd, &child, &flags )) break;
         if (!flags) break;  /* nothing more to do */
 
-        SendMessageW( child, WM_PAINT, 0, 0 );
+        if (child == prev)  /* same window again, didn't get repainted properly */
+        {
+            UINT erase_flags = UPDATE_NONCLIENT | UPDATE_ERASE | UPDATE_NOCHILDREN;
+            HRGN hrgn;
+            RECT rect;
 
+            TRACE( "%p not repainted properly, erasing\n", child );
+            if ((hrgn = send_ncpaint( child, NULL, &erase_flags )))
+            {
+                send_erase( child, erase_flags, hrgn, &rect, NULL );
+                DeleteObject( hrgn );
+            }
+        }
+        else
+        {
+            prev = child;
+            SendMessageW( child, WM_PAINT, 0, 0 );
+        }
         if (rdw_flags & RDW_NOCHILDREN) break;
     }
 }