iText: PdfTable cell vertical alignment

Question

I'm trying to vertical align my headet cell text to be in the middle of the cell height.

This is my code:

    PdfPCell c1 = new PdfPCell(cerate_phrase("" ,regular_bold ));
    c1.setHorizontalAlignment(Element.ALIGN_CENTER);
    c1.setVerticalAlignment(Element.ALIGN_MIDDLE);
    c1.setBackgroundColor(BaseColor.LIGHT_GRAY);
    table_.addCell(c1);

but this does not work. setHorizontalAlignment is centered but not setVerticalAlignment.

Am I doing something wrong? how can i vertically align it in the middle?

Any help will be appreciated.

This question has been asked (and answered) on several occasions. Search for PdfCell vertical alignment. — Mark Storer, Apr 05 '11 at 18:28
@ Mark Storer: I found this question :iText - vertical alignment not working in composite mode - but it did not worked for me. any ideas? — user590586, Apr 07 '11 at 09:49
@MarkStorer Could you link to the dupe? My search didn't turn up anything. — djeikyb, Nov 28 '12 at 18:28

djeikyb · Answer 1 · 2013-09-18T16:59:39.817

According to Lowagie:

PdfPCell cell = new PdfPCell(new Phrase("blah Blah blah");
cell.setVerticalAlignment(Element.ALIGN_MIDDLE);

This is always correct in a technical sense, but sometimes looks bad.

To center, draw a box around the object, find its middle, and align it with the center of its surrounding object.

iText thus finds the center of the phrase, and aligns it. But human eyes sometimes focus on the bulk of text, say the parts of the font between the baseline and the cap height. So to have it look good, you need to center relative to that.

Phrase content = new Phrase("Blah blah blah", Font);

Float fontSize = content.getFont().getSize();
Float capHeight = content.getFont().getBaseFont().getFontDescriptor(BaseFont.CAPHEIGHT, fontSize);

Float padding = 5f;    

PdfPCell cell = new PdfPCell(content);
cell.setPadding(padding);
cell.setPaddingTop(capHeight - fontSize + padding);

Note that the PdfPCell method setVerticalAlignment(..) isn't used.

It seems like this wouldn't necessarily work for a multi-line phrase, but it does.

The problem would be obvious if iText could show bounding boxes around things (mind, you can tell iText to draw bounding boxes, it's just more work than a magical on/off switch).

This solution is adapted from an email from Paulo Soares.

The idea is good, but it doesn't work perfectly .. I don't think that the float "padding" should be fixed to "5f" — Hazem Elraffiee, Jan 15 '13 at 13:02
try this: `setPaddingBottom(2*(fontSize-capHeight));` and you call `setVerticalAlignment(Element.ALIGN_MIDDLE);` — Hazem Elraffiee, Jan 15 '13 at 13:22
@djeikyb super you saved my time..Thanks +1 vote for your answer. — Sagar Aghara, May 01 '17 at 09:31

score 26 · Answer 2 · answered Feb 06 '17 at 10:20

26

Add cell.setUseAscender(true) before c1.setVerticalAlignment(Element.ALIGN_MIDDLE); I have the same problem with you, when add code above I find it can work, hope this can solve your problem, thanks.

answered Feb 06 '17 at 10:20

Sucy

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score 1 · Answer 3 · edited Jan 24 '19 at 12:49

1

You can use the option ExtraParagraphSpace:

c1.HorizontalAlignment = Element.ALIGN_CENTER;
c1.VerticalAlignment = Element.ALIGN_MIDDLE;
c1.ExtraParagraphSpace = 2;

edited Jan 24 '19 at 12:49

J-Alex

6,881
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answered Jan 24 '19 at 12:26

Pajoc

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score 0 · Answer 4 · edited Apr 12 '19 at 12:27

0

You cant do like this :

cell.setBackgroundColor(BaseColor.GRAY);
cell.setHorizontalAlignment(Element.ALIGN_LEFT);
cell.setVerticalAlignment(Element.ALIGN_MIDDLE);
cell.setUseAscender(true);

edited Apr 12 '19 at 12:27

mkl

90,588
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answered Apr 11 '19 at 11:00

Arséne

95
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iText: PdfTable cell vertical alignment

4 Answers4

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