Make RDW_ValidateParent() modify the update region of all parents, not

windows/painting.c

@@ -471,30 +471,28 @@ END:
 /***********************************************************************
  * 		RDW_ValidateParent [RDW_UpdateRgns() helper] 
  *
- *  Validate the portions of parent that are covered by a validated child
+ *  Validate the portions of parents that are covered by a validated child
  *  wndPtr = child
  */
 void  RDW_ValidateParent(WND *wndChild)  
 {
     WND *wndParent = WIN_LockWndPtr(wndChild->parent);
     WND *wndDesktop = WIN_GetDesktop();
-
-    if ((wndParent) && (wndParent != wndDesktop) && !(wndParent->dwStyle & WS_CLIPCHILDREN))
-    {
     HRGN hrg;
-        if (wndChild->hrgnUpdate == 1 )
-        {
-            RECT r;
 
+    if (wndChild->hrgnUpdate == 1 ) {
+        RECT r;
         r.left = 0;
         r.top = 0;
         r.right = wndChild->rectWindow.right - wndChild->rectWindow.left;
         r.bottom = wndChild->rectWindow.bottom - wndChild->rectWindow.top;
-
         hrg = CreateRectRgnIndirect( &r );
-        }
-        else
+    } else
         hrg = wndChild->hrgnUpdate;
+
+    while ((wndParent) && (wndParent != wndDesktop) ) {
+        if (!(wndParent->dwStyle & WS_CLIPCHILDREN))
+        {
             if (wndParent->hrgnUpdate != 0)
             {
                 POINT ptOffset;
@@ -519,8 +517,10 @@ void  RDW_ValidateParent(WND *wndChild)
                 CombineRgn( wndParent->hrgnUpdate, wndParent->hrgnUpdate, hrg, RGN_DIFF );
                 OffsetRgn( hrg, -ptOffset.x, -ptOffset.y );
             }
-        if (hrg != wndChild->hrgnUpdate) DeleteObject( hrg );
         }
+        WIN_UpdateWndPtr(&wndParent, wndParent->parent);    
+    }
+    if (hrg != wndChild->hrgnUpdate) DeleteObject( hrg );
     WIN_ReleaseWndPtr(wndParent);
     WIN_ReleaseDesktop();
 }