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JuliaSet3.javaAPI DocExample4810Sat Jan 24 10:44:36 GMT 2004je3.print

JuliaSet3

public class JuliaSet3 extends JuliaSet2
This class extends JuliaSet2 and its print() and save() methods demonstrate the Java 1.4 printing API.

Fields Summary
Constructors Summary
public JuliaSet3()

 super(-.7, -.25);
Methods Summary
public voidprint()

	// Get a list of all printers that can handle Printable objects.
	DocFlavor flavor = DocFlavor.SERVICE_FORMATTED.PRINTABLE;
	PrintService[] services =
	    PrintServiceLookup.lookupPrintServices(flavor, null);

	// Set some define printing attributes
	PrintRequestAttributeSet printAttributes =
	    new HashPrintRequestAttributeSet();
	printAttributes.add(OrientationRequested.LANDSCAPE); // landscape mode
	printAttributes.add(Chromaticity.MONOCHROME);        // print in mono

	// Display a dialog that allows the user to select one of the
	// available printers and to edit the default attributes
	PrintService service = ServiceUI.printDialog(null, 100, 100,
						     services, null, null,
						     printAttributes);

	// If the user canceled, don't do anything
	if (service == null) return;

	// Now call a method defined below to finish the printing
	printToService(service, printAttributes);
public voidprintToService(javax.print.PrintService service, javax.print.attribute.PrintRequestAttributeSet printAttributes)

	// Wrap ourselves in the PrintableComponent class defined by JuliaSet2.
	String title = "Julia set for c={" + cx + "," + cy + "}";
	Printable printable = new PrintableComponent(this, title);

	// Now create a Doc that encapsulate the Printable object and its type
	DocFlavor flavor = DocFlavor.SERVICE_FORMATTED.PRINTABLE;
	Doc doc = new SimpleDoc(printable, flavor, null);

	// Java 1.1 uses PrintJob.
	// Java 1.2 uses PrinterJob.
	// Java 1.4 uses DocPrintJob. Create one from the service
	DocPrintJob job = service.createPrintJob();

	// Set up a dialog box to  monitor printing status
	final JOptionPane pane = new JOptionPane("Printing...", 
						 JOptionPane.PLAIN_MESSAGE);
	JDialog dialog = pane.createDialog(this, "Print Status");
	// This listener object updates the dialog as the status changes
	job.addPrintJobListener(new PrintJobAdapter() {
		public void printJobCompleted(PrintJobEvent e) {
		    pane.setMessage("Printing complete.");
		}
		public void printDataTransferCompleted(PrintJobEvent e) {
		    pane.setMessage("Document transfered to printer.");
		}
		public void printJobRequiresAttention(PrintJobEvent e) {
		    pane.setMessage("Check printer: out of paper?");
		}
		public void printJobFailed(PrintJobEvent e) {
		    pane.setMessage("Print job failed");
		}
	    });

	// Show the dialog, non-modal.
	dialog.setModal(false);
	dialog.show();

	// Now print the Doc to the DocPrintJob
	try {
	    job.print(doc, printAttributes);
	}
	catch(PrintException e) {
	    // Display any errors to the dialog box
	    pane.setMessage(e.toString());
	}
public voidsave()

	// Find a factory object for printing Printable objects to PostScript.
	DocFlavor flavor = DocFlavor.SERVICE_FORMATTED.PRINTABLE;
	String format = "application/postscript";
	StreamPrintServiceFactory factory = StreamPrintServiceFactory.
	    lookupStreamPrintServiceFactories(flavor, format)[0];

	// Ask the user to select a file and open the selected file
	JFileChooser chooser = new JFileChooser();
	if (chooser.showSaveDialog(this)!=JFileChooser.APPROVE_OPTION) return;
	File f = chooser.getSelectedFile();
	FileOutputStream out = new FileOutputStream(f);

	// Obtain a PrintService that prints to that file
	StreamPrintService service = factory.getPrintService(out);

	// Do the printing with the method below
	printToService(service, null);

	// And close the output file.
	out.close();