I found in most cases I was adding content to the document as two
tables: a summary of a product and the transactions on that product.
That said, I extended Document like so:
public class MyDocument extends Document {
private Logger log = Logger.getLogger(this.getClass());
private PdfContentByte canvas;
public MyDocument(Rectangle pageSize, int left, int right, int
top, int bottom) {
super(pageSize, left, right, top, bottom);
}
public void setDirectContent(PdfContentByte canvas) {
this.canvas = canvas;
}
/**
* creates a bookmark
*
* @param bookmarkText
*/
protected void createBookmark(String bookmarkText) {
PdfDestination d = new PdfDestination(PdfDestination.XYZ, 0,
canvas.getPdfWriter().getVerticalPosition(true), 0);
new PdfOutline(canvas.getRootOutline(), d, bookmarkText,
false);
}
protected float getPageWidth() {
return right() - left();
}
/**
* used when adding a section to the document where a summary and
some
* number of transaction must always appear together
*
* @param summary
* - a summary table which will not span multiple pages
* @param transactions
* - a transaction table which _may_ span multiple
pages
* @param numStickyTransactions
* - the number of transactions that must appear
together. If
* there isn't room for these transactions to appear
together, a
* pagebreak is inserted before the summary is added
* @param bookmarkText
* - the text used as a bookmark to this section. If
null, no
* bookmark is created
*/
public void addSection(PdfPTable summary, PdfPTable transactions,
int numStickyTransactions, String bookmarkText)
throws Exception {
for (PdfPTable t : new PdfPTable[] { summary, transactions
}) {
t.setTotalWidth(getPageWidth());
t.setLockedWidth(true);
}
float totalNeeded = summary.getTotalHeight();
// two header rows are assumed. row 0 is the "(Continued)"
banner and
// row 1 is the column headers
for (int i = 2; i <= numStickyTransactions + 2; i++) {
totalNeeded += transactions.getRowHeight(i);
}
float remaining =
canvas.getPdfWriter().getVerticalPosition(true) - bottomMargin();
if (log.isDebugEnabled()) {
log.debug("total height needed " + totalNeeded);
log.debug("total space remaining: " + remaining);
}
if (remaining < totalNeeded) {
if (log.isDebugEnabled()) {
log.debug("page break needed");
}
newPage();
}
if (null != bookmarkText) {
createBookmark(bookmarkText);
}
add(summary);
add(transactions);
}
}
This way the summary is always added to the page before the
transactions. This means the skipFirstHeaders on the transaction table
will always be respected. It will also work as expected regardless of
font sizes and document margins. I'm _sure_ there is a more "slick"
solution, but I'm a big fan of easy to understand code, and this is what
I came up with. I also really wanted to use document.add() and avoid
absolute positioning hell as much as I could.
Thanks for the tip about cell borders, I'll give it whirl right now and
let you know what the difference in file size is.
Jason
-----Original Message-----
From: 1T3XT info [mailto:[email protected]]
Sent: Friday, July 09, 2010 2:14 AM
To: Post all your questions about iText here
Subject: Re: [iText-questions] adding borders bloats file size?
Jason Berk wrote:
> Is it normal for cell borders to bloat the size of the file this
> significantly?
Nice report!
I like what you've done with the "Continued" header!
How did you eventually implement it?
As for the cell borders.
I fear it's inherent to the fact that the full line
used as bottom border for the table consists of a
series of small lines, one for each cell.
You can significantly reduce the file size by using
a table event and by drawing the bottom border of
each row using one single line.
Use this for inspiration:
http://itextpdf.com/examples/index.php?page=example&id=93
(Change the tableLayout method so that it draws a line
instead of a Rectangle.)
--
This answer is provided by 1T3XT BVBA
http://www.1t3xt.com/ - http://www.1t3xt.info
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