Validate the parent with the child window client rectangle when the
parent's update region is not empty.
diff --git a/windows/winpos.c b/windows/winpos.c
index 087be53..fc51714 100644
--- a/windows/winpos.c
+++ b/windows/winpos.c
@@ -2275,8 +2275,21 @@
if( ow < nw ) r.right = r.left + nw;
if( IntersectRect( &r, &r, &rClip ) )
+ {
Wnd->pDriver->pSurfaceCopy( Wnd->parent, dc, dx, dy, &r, TRUE );
+ /* When you copy the bits without repainting, parent doesn't
+ get validated appropriately. Therefore, we have to validate
+ the parent with the windows' updated region when the
+ parent's update region is not empty. */
+
+ if (Wnd->parent->hrgnUpdate != 0 && !(Wnd->parent->dwStyle & WS_CLIPCHILDREN))
+ {
+ OffsetRect(&r, dx, dy);
+ ValidateRect(Wnd->parent->hwndSelf, &r);
+ }
+ }
+
GDI_HEAP_UNLOCK( hDC );
}
ReleaseDC( (uFlags & SWP_EX_PAINTSELF) ?
