Why do the two table rows get so close to each other? - itext

Question

I am creating two rows. The first row contains 0, 1, ..., 10. The second row contains a radio button beneath each number. Here is my code:
for (int k=0; k<=10; k++) {
String text = k + "";
cell = new PdfPCell(new Phrase(text));
cell.setBorder(Rectangle.NO_BORDER);
cell.setHorizontalAlignment(Element.ALIGN_CENTER);
cell.setVerticalAlignment(Element.ALIGN_TOP);
cell.setPaddingTop(5);
table.addCell(cell);
}
for (int k=0; k<=10; k++) {
cell = new PdfPCell();
cell.setBorder(Rectangle.NO_BORDER);
cell.setHorizontalAlignment(Element.ALIGN_CENTER);
cell.setVerticalAlignment(Element.ALIGN_BOTTOM);
cell.setPaddingTop(10);
cell.setCellEvent(new MyCellField(radiogroup, k+""));
table.addCell(cell);
}
MyCellField is similar to what is available on this page:
http://developers.itextpdf.com/examples/form-examples/create-fields-table
The problem is that no matter what spacing I give to the second row, the produced radio buttons in the second always overlap with their respective numbers.

Answer 1

You create a cell without any content when you do this: cell = new PdfPCell();
No content means: no height. You probably want to add this line:
cell.setFixedHeight(30);
This way, you are sure that the height of the cell will be sufficient to add a radio button.
In iText 5, we often use cell.setUseAscender(true); and cell.setUseDescender(true); to get a better positioning of the text. This problem is addressed in iText 7.