func docWriter(pdf *gofpdf.Fpdf, idx int) *pdfWriter {
pw := new(pdfWriter)
pw.pdf = pdf
pw.idx = idx
if pdf.Ok() {
var err error
fileStr := fmt.Sprintf("%s/pdf/tutorial%02d.pdf", cnGofpdfDir, idx)
pw.fl, err = os.Create(fileStr)
if err != nil {
pdf.SetErrorf("Error opening output file %s", fileStr)
}
}
return pw
}
