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public class TextExample4 { public static final String[] AKIRA = { "Akira Kurosawa", " (", "\u9ed2\u6fa4 \u660e", " or ",
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Using java.awt.Graphics2D
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"\u9ed2\u6ca2 \u660e", ", Kurosawa Akira, 23 March 1910" + " 6 September 1998) was a Japanese film director," Contains text + " producer, screenwriter and editor. In a career " snippets + "that spanned 50 years, Kurosawa directed 30 " + "films. He is widely regarded as one of the most " + "important and influential filmmakers in film " + "history." }; public static final String[] STYLES = { Lists corresponding "bold", "regular", "japanese", "regular", styles "japanese", "regular" }; public static void initStyles(StyledDocument doc) { Style def = StyleContext.getDefaultStyleContext() .getStyle(StyleContext.DEFAULT_STYLE); StyleConstants.setFontFamily(def, "SansSerif"); Style regular = doc.addStyle("regular", def); Initializes Style bold = doc.addStyle("bold", regular); styles StyleConstants.setBold(bold, true); Style japanese = doc.addStyle("japanese", def); StyleConstants.setFontFamily( japanese, "MS PGothic"); } public static JTextPane createTextPane() throws BadLocationException { JTextPane textPane = new JTextPane(); Creates StyledDocument doc = textPane.getStyledDocument(); JTextPane initStyles(doc); for (int i=0; i < AKIRA.length; i++) { Adds snippets doc.insertString(doc.getLength(), AKIRA[i], of text doc.getStyle(STYLES[i])); } return textPane; } }
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The JTextPane class extends the Component class, and you ll use its print() method in the next listing.
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DefaultFontMapper mapper = new DefaultFontMapper(); BaseFontParameters parameters = new BaseFontParameters( "c:/windows/fonts/msgothic.ttc,1"); parameters.encoding = BaseFont.IDENTITY_H; mapper.putName("MS PGothic", parameters ); Graphics2D g2 = canvas.createGraphics(300, 150, mapper); JTextPane text = TextExample4.createTextPane(); text.setSize(new Dimension(300, 150)); text.print(g2); Prints JTextPane g2.dispose(); to PDF
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This technique is frequently used in Swing applications. For instance, if you have an application with a JTable that s shown on the screen, you can print that JTable to PDF using its print() method instead of using PdfPTable.
The imaging model
NOTE The two methods for creating a PdfGraphics2D object, createGraphics() and createGraphics2D(), also exist with two extra parameters: convertImagesToJPEG and quality. Use these parameters to tell iText that it
should convert all the images that are added to JPEGs. This can be an interesting way to reduce the size of the resulting PDF document. The quality parameter has the same meaning as the parameter with the same name in section 10.2.6. In the next chapter, you ll use the PdfGraphics2D class to convert files in the Scalable Vector Graphics (SVG) format to PDF. Right now, it s time to summarize what this chapter was about.
14.6 Summary
We started this chapter by peeking into the content stream of a page, and we were confronted with PDF syntax for stroking and filling paths and shapes. To understand this syntax, we first looked at path construction and painting operators, and then we moved on to the operators that change the graphics state. The coordinate system received our special attention. Along the way, you learned about some convenience methods provided by iText. We did the same for text and text state, looking at reference tables listing all the methods that are available in the PdfContentByte object. Then we repeated more or less what we did before, drawing paths and shapes and drawing text, but we didn t use any of the methods discussed previously. Instead, we used the standard Java methods that are available in the abstract class PdfGraphics2D. In the next chapter, we ll continue examining the content of a PDF page, but we ll focus on optional content and PDF tags. We ll also try to parse a content stream to extract text from a page.
Page content and structure
This chapter covers
Making content optional Working with marked content Parsing PDF files
The previous chapter was devoted entirely to page content; you learned how to add content the PDF way and the Java way. We ll continue discussing content in this chapter. We ll add operators and operands to make part of the content optional. We ll use marked content to add custom parameters to graphical objects, to make the content accessible for the visually impaired, and to store the structure of the document. Finally, we ll make a fair attempt at parsing a PDF document and extracting content from a page.
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