Name: bsC130419			Date: 07/17/2001


java version "1.4.0-beta"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.4.0-beta-b65)
Java HotSpot(TM) Client VM (build 1.4.0-beta-b65, mixed mode)

When I use java.awt.font.TextLayout to render text on my printer, the quality
of the text is bad as compared to when using java.awt.Graphics.drawString.  The
following code illustrates the problem.  I have seen the same behavior on JDK
1.3.1 and 1.4 beta.  Interestingly, JDK 1.2.2 has bad print quality in both
cases.

I am printing from Windows 2000 to a HP OfficeJet T45.

Note that this bug effects the print quality of JEditorPane/JTextPane when i18n
is enabled, because javax.swing.text.GlyphPainter2 uses TextLayout.

public class TextLayoutTest {
    private static java.awt.Component canvas = new Canvas();

    public static void main( String args[]) {
	try {
	    java.awt.Frame frame = new java.awt.Frame("TextLayoutTest");
	    frame.setLayout( new java.awt.BorderLayout());
	    frame.addWindowListener( new java.awt.event.WindowAdapter() {
		    public void windowClosing( java.awt.event.WindowEvent
event) {
			System.exit(0);
		    }
		});
	    frame.add( canvas, java.awt.BorderLayout.CENTER);
	    javax.swing.JButton printButton = new javax.swing.JButton("print");
	    printButton.addActionListener( new java.awt.event.ActionListener() {
		    public void actionPerformed( java.awt.event.ActionEvent e) {
			try {
			    java.awt.print.PrinterJob printerJob =
java.awt.print.PrinterJob.getPrinterJob();
			    java.awt.print.Book book = new java.awt.print.Book
();
			    book.append( new PrintableAdapter( canvas),
printerJob.defaultPage());
			    printerJob.setPageable( book);
			    if( printerJob.printDialog()) {
				printerJob.print();
			    }
			}
			catch( Throwable ex) {
			    ex.printStackTrace();
			}
		    }
		});
	    frame.add( printButton, java.awt.BorderLayout.SOUTH);
	    frame.pack();
	    frame.setVisible( true);
	}
	catch( Exception ex) {
	    ex.printStackTrace();
	}
    }

    /**
     * The drawing surface.
     */
    static class Canvas extends java.awt.Component {

	/**
	 * Restrict our size to our preferred size.
	 */
	public java.awt.Dimension getPreferredSize() {
	    java.awt.Dimension dim = new java.awt.Dimension( 200, 150);
	    return dim;
	}
	public java.awt.Dimension getMaximumSize() {
	    return getPreferredSize();
	}
	public java.awt.Dimension getMinimumSize() {
	    return getPreferredSize();
	}

	/**
	 * The goodies are here.
	 */
	public void paint( java.awt.Graphics graphicsArg) {
	    java.awt.Graphics2D graphics = (java.awt.Graphics2D)graphicsArg;

	    graphics.setColor( java.awt.Color.black);
	    String text = "The Java language provides special support for the
string concatentation operator";
	    java.awt.Font font = new java.awt.Font("serif",
java.awt.Font.PLAIN, 6);
	    graphics.setFont( font);
	    graphics.drawString( text, 0, 50);
	    java.text.AttributedString string = new java.text.AttributedString(
text);
	    string.addAttribute( java.awt.font.TextAttribute.FONT, font);
	    java.text.AttributedCharacterIterator iterator = string.getIterator
();
	    java.awt.font.LineBreakMeasurer measurer = new
java.awt.font.LineBreakMeasurer( iterator, graphics.getFontRenderContext());
	    float y = 100;
	    while( measurer.getPosition() < iterator.getEndIndex()) {
		java.awt.font.TextLayout layout = measurer.nextLayout( getWidth
());
		y += layout.getAscent();
		layout.draw( graphics, 0, y);
		y += layout.getDescent() + layout.getLeading();
	    }
	}

    };

    /**
     * Adapter for printing AWT components.
     */
    static class PrintableAdapter implements java.awt.print.Printable {
	private java.awt.Component component;
	public PrintableAdapter( java.awt.Component componentArg) {
	    component = componentArg;
	}
	public int print( java.awt.Graphics graphicsArg,
java.awt.print.PageFormat pageFormat, int pageIndex) throws
java.awt.print.PrinterException {
	    java.awt.Graphics2D graphics = (java.awt.Graphics2D)graphicsArg;
	    graphics.translate( pageFormat.getImageableX(),
pageFormat.getImageableY());
	    graphics.setClip( 0, 0, (int)pageFormat.getImageableWidth(), (int)
pageFormat.getImageableHeight());
	    component.print( graphics);
	    return PAGE_EXISTS;
	}
    }
}
(Review ID: 128220) 
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