Gap between text and barcode with iText

Question

I am generate Barcode128 with library iText-2.1.3. This is code which I am using:

private void createBarcode(String kodDokumentu, String idSadowka, String projekt) throws IOException, DocumentException
    {
        File barcodePdf = new File(pathToPdf);
        Files.deleteIfExists(barcodePdf.toPath());
        Document document = new Document();
        Rectangle size = new Rectangle(151,60);
        document.setMargins(5, 1, -6, 0);
        document.setPageSize(size);
        FileOutputStream fos = new FileOutputStream(pathToPdf);
        PdfWriter writer = PdfWriter.getInstance(document, fos);

        document.open();
        PdfContentByte cb = writer.getDirectContent();
        Barcode barcode128 = new Barcode128();
        barcode128.setBarHeight(40);
        barcode128.setX(1.04f);
        barcode128.setCode("VL#"+kodDokumentu.toUpperCase());
        barcode128.setCodeType(Barcode.CODE128);
        Image code128Image = barcode128.createImageWithBarcode(cb, null, null);
        Font code = new Font(FontFamily.TIMES_ROMAN, 8, Font.NORMAL, BaseColor.BLACK);
        Paragraph p = new Paragraph("ID: "+idSadowka+",   Projekt: "+projekt.substring(0, 2), code);
        document.add(p);
        document.add(code128Image);
        document.close();
        fos.close();
    }

I want to achive as small h (take a look at image) as it is possible, best if h=0.01 because I want to save more place for ID: xxxxx, Projekt: xx to make it bigger and easier to read by human. First (bottom barcode) I used font size 8, then (upper barcode) I tried to change font size to 10 but when I did it h is bigger than previous. I know that font size is connected with gap between barcode and text above it but is it possible to use bigger font size and set this gap really small?

Answer 1

Not sure if it's available in the version of iText you use, but on iText 5 at least, you have the option to set the "spacing after" on Paragraphs. It would be exactly what you need, i.e. you specify a fixed space under the paragraph, and any elements you add to the document after that paragraph, will go under that space.

p.setSpacingAfter(x)

Where x being the space you need, in user units or "points".