void   SetIsPrintPreview(PRBool aIsPrintPreview) { mIsDoingPrintPreview = aIsPrintPreview; }
void nsPrintEngine::SetIsPrintPreview(PRBool aIsPrintPreview) { mIsDoingPrintPreview = aIsPrintPreview;  if (mDocViewerPrint) { mDocViewerPrint->SetIsPrintPreview(aIsPrintPreview); } }
  void   SetIsPrintPreview(PRBool aIsPrintPreview) { mIsDoingPrintPreview = aIsPrintPreview; }