Re: [Jung-support] Output to PDF using iText

[Joshua O'M. <jos...@gm...>]

This was answered on the JUNG web forum by searching for "headless":
http://sourceforge.net/projects/jung/forums/forum/252062/topic/1407188

On Tue, May 15, 2012 at 6:44 AM, Ryan Ames <rya...@ma...>wrote:

>  Hi,
>
>  I'm trying to use JUNG and iText (http://itextpdf.com/) to export a JUNG
> network to a PDF file.
>
>  I've searched online but not been able to find exactly what I'm looking
> for. My application doesn't use a GUI and so I never display the graph to
> then capture the screen, as I have seen in several examples.
>
>  What I want to do is draw the graph on a graphics2d object that can then
> be used to output to a PDF. However my current code (below) just creates a
> blank PDF document.
>
>  Any useful code snippets or advice would be much appreciated.
>
>  Regards
>
>  Ryan
>
>  My current code is:
>
>   public void write() throws IOException, DocumentException {
>
>  // Open the PDF file for writing - and create a graphics object
>  this.document = new Document();
>  this.writer = PdfWriter.getInstance(this.document, new FileOutputStream(
> this.fileName));
>  document.open();
>          PdfContentByte contentByte = writer.getDirectContent();
>          PdfTemplate template = contentByte.createTemplate(WIDTH, HEIGHT);
>          Graphics2D graphics2d = template.createGraphics(WIDTH, HEIGHT,
> new DefaultFontMapper());
>
>  // Apply a layout to the graph
>  Layout<Vertex, Edge> layout = new CircleLayout<Vertex, Edge>(this.network
> );
>  layout.setSize(new Dimension(WIDTH, HEIGHT));
>
>  // Draw on the graphics 2D object
>  VisualizationImageServer<Vertex, Edge> visualise = new VisualizationImageServer<Vertex,
> Edge>(layout);
>  visualise.setDoubleBuffered(false);
>  visualise.paintComponents(graphics2d);
>
>  graphics2d.dispose();
>  contentByte.addTemplate(template, 0, 0);
>
>          this.document.close();
>
>  }
>
>
>
>
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-- 
  jos...@gm.../~jmadden
   Joshua O'Madadhain: Information Scientist, Musician, Philosopher-At-Tall
It's that moment of dawning comprehension that I live for.  -- Bill
Watterson
 My opinions are too rational and insightful to be those of any
organization.