qwt_plot_renderer.cpp

        filter += imageFilter;
    }   
    
    fileName = QFileDialog::getSaveFileName(
        NULL, tr( "Export File Name" ), fileName,
        filter.join( ";;" ), NULL, QFileDialog::DontConfirmOverwrite );
#endif  
    if ( fileName.isEmpty() )
        return false;

    renderDocument( plot, fileName, sizeMM, resolution );

    return true;
}