How do I paint Swing Components to a PDF file with iText?

Question

I would like to print my Swing JComponent via iText to pdf.

JComponent com = new JPanel();
com.add( new JLabel("hello") );

PdfWriter writer = PdfWriter.getInstance( document, new FileOutputStream( dFile ) );
document.open( );

PdfContentByte cb = writer.getDirectContent( );
PdfTemplate tp = cb.createTemplate( pageImageableWidth, pageImageableHeight );
Graphics2D g2d = tp.createGraphics( pageImageableWidth, pageImageableHeight, new DefaultFontMapper( ) );
g2d.translate( pf.getImageableX( ), pf.getImageableY( ) );
g2d.scale( 0.4d, 0.4d );
com.paint( g2d );
cb.addTemplate( tp, 25, 200 );
g2d.dispose( );

Unfortunately nothing is shown in the PDF file. Do you know how to solve this problem?

score 4 · Accepted Answer · answered Jan 10 '09 at 09:29

4

I have figured it out adding addNotify and validate helps.

    com.addNotify( );
    com.validate( );

answered Jan 10 '09 at 09:29

Jonas

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Yes. JavaDoc of addNotify() says it "should not be called directly by programs", but in practice, it is necessary in headless context (exporting without a GUI). Otherwise, the children of the component are not laid out and keep a size of zero. – PhiLho Oct 31 '12 at 13:21

score 2 · Answer 2 · answered Apr 20 '09 at 15:21

2

I needed to call

com.addNotify()
com.setSize()
com.validate()

answered Apr 20 '09 at 15:21

Sam Barnum

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score 1 · Answer 3 · answered Jan 08 '09 at 19:59

1

I don't know that much about iText, but... you did close the PdfWriter at some point, right?

answered Jan 08 '09 at 19:59

Michael Myers

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How do I paint Swing Components to a PDF file with iText?

3 Answers3

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