How to fill remaining space of a line in iText7

Question

I'm trying to fill the remaining space of the last line of a paragraph using iText7 with C#:

var par = new Paragraph(text);
par.Add(c);
document.Add(par);

How can i add - char to fill the space left by the line? Something like LineSeparator(new DashedLine() but from the beginning on the last character of my paragraph instead of new line.

I've tried this but it's not compatible: https://stackoverflow.com/questions/38236515/it-is-possible-with-itext-5-which-at-the-end-of-a-paragraph-justified-the-remain — ihavenokia, Nov 25 '19 at 17:03

score 3 · Accepted Answer · answered Nov 25 '19 at 17:29

You can use the concept of tabs and tab stops for it. This concept is not iText-specific. Roughly speaking you can define points (tab stops) and adding a tab would "jump" to the next point. In your case the tab stop is the end of the line and you only need one tab.

Here is a complete example that uses small dashes on the baseline as the filling. You can implement ILineDrawer yourself to customize the behavior or subclass/configure an existing implementation. The code is in Java, but to convert it to C# you basically need to do some capitalization and that's it.

Document doc = ....;
Paragraph p = new Paragraph("Hello world").add(new Tab());
ILineDrawer filling = new DashedLine();
PageSize pageSize = doc.getPdfDocument().getDefaultPageSize();
Rectangle effectivePageSize = doc.getPageEffectiveArea(pageSize);
float rightTabStopPoint = effectivePageSize.getWidth();
TabStop tabStop = new TabStop(rightTabStopPoint, TabAlignment.LEFT, filling);
p.addTabStops(tabStop);
doc.add(p);

Result looks as follows:

That works perfectly! Thank you. Hope this can help more folks with problems like this. — ihavenokia, Nov 25 '19 at 17:44
I used CustomTagWorker and I'm able to do this in htmlPDF version too — ihavenokia, Feb 26 '20 at 11:32

How to fill remaining space of a line in iText7

1 Answers1