Larry Schmidlin wrote:
Is there an easy way to create a pdf in the Printer's Spread format
using iText? i.e., I'm making a 20 page book and the pages are 2
sided, but half the size of a regular letter size. Thus, 4 pages are
put on a piece of paper, 2 pages on each side of the piece of paper.
The paper is then cut or folded to create the book. (A very common
book size in bookstores).
One printer says he'd prefer to see the pages like
20/1 & 2/19,
18/3 & 4/17,
16/5 & 6/15,
14/7 & 8/13,
12/9 & 10/11
Another printer says to create
1/4 & 2/3,
5/8 & 6/7,
9/12 & 10/11,
13/16 & 14/15,
17/20 & 18/19.
I see how I could play some tricks doing something similar to the
TwoOnOne example by creating some temporary pdfs, then combining them,
but thought I'd check if someone has solved it already.
For the Manning Book I have made the following example.
It puts a 4 page document on 1 page so that it can be folded.
You'll have to adapt the code, but especially the lines with
addTemplate should be interesting for you.
Document document = new Document(PageSize.A4);
try {
// we create a PdfReader object
PdfReader reader = new PdfReader("HelloUniverse.pdf");
// step 2
PdfWriter writer = PdfWriter.getInstance(document, new
FileOutputStream("HelloWorldFolded.pdf"));
// step 3
document.open();
// step 4
PdfContentByte cb = writer.getDirectContent();
PdfImportedPage page;
page = writer.getImportedPage(reader, 1);
cb.addTemplate(page, -0.5f, 0f, 0f, -0.5f,
PageSize.A4.width() / 2, PageSize.A4.height());
page = writer.getImportedPage(reader, 2);
cb.addTemplate(page, 0.5f, 0f, 0f, 0.5f, 0f, 0f);
page = writer.getImportedPage(reader, 3);
cb.addTemplate(page, 0.5f, 0f, 0f, 0.5f, PageSize.A4.width()
/ 2f, 0f);
page = writer.getImportedPage(reader, 4);
cb.addTemplate(page, -0.5f, 0f, 0f, -0.5f,
PageSize.A4.width(), PageSize.A4.height());
cb.setLineDash(20, 10, 10);
cb.moveTo(0, PageSize.A4.height() / 2f);
cb.lineTo(PageSize.A4.width(), PageSize.A4.height() / 2f);
cb.stroke();
cb.moveTo(PageSize.A4.width() / 2f, 0);
cb.lineTo(PageSize.A4.width() / 2f, PageSize.A4.height());
cb.stroke();
} catch (IOException e) {
e.printStackTrace();
} catch (DocumentException e) {
e.printStackTrace();
}
// step 5
document.close();
br,
Bruno
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