tdf#92914 SwPagePreviewLayout::MarkNewSelectedPage: avoid direct paint

With this, when the user select an other page in the print preview
window, the selection rectangle is no longer painted directly.

Change-Id: I85f1cb9d09c8545222ed49ff0acf819540d10920
(cherry picked from commit da24bd36)
Reviewed-on: https://gerrit.libreoffice.org/17381Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Jan Holesovsky <kendy@collabora.com>

sw/source/core/view/pagepreviewlayout.cxx

@@ -1297,7 +1297,12 @@ void SwPagePreviewLayout::MarkNewSelectedPage( const sal_uInt16 _nSelectedPage )
     // re-paint for new selected page in order to mark it.
     const PreviewPage* pNewSelectedPreviewPage = _GetPreviewPageByPageNum( _nSelectedPage );
     if ( pNewSelectedPreviewPage && pNewSelectedPreviewPage->bVisible )
-        _PaintSelectMarkAtPage( *pOutputDev, pNewSelectedPreviewPage );
+    {
+        const PreviewPage* pSelectedPreviewPage = _GetPreviewPageByPageNum(mnSelectedPageNum);
+        SwRect aPageRect(pSelectedPreviewPage->aPreviewWinPos, pSelectedPreviewPage->aPageSize);
+        ::SwAlignRect(aPageRect, &mrParentViewShell, pOutputDev);
+        mrParentViewShell.GetWin()->Invalidate(aPageRect.SVRect());
+    }
 }
 
 // helper methods