Mega Code Archive
How to print 2D graphics
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/*
This program is a part of the companion code for Core Java 8th ed.
(http://horstmann.com/corejava)
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
import java.awt.BorderLayout;
import java.awt.EventQueue;
import java.awt.Font;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Shape;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.font.FontRenderContext;
import java.awt.font.TextLayout;
import java.awt.geom.AffineTransform;
import java.awt.geom.GeneralPath;
import java.awt.geom.Line2D;
import java.awt.geom.Point2D;
import java.awt.geom.Rectangle2D;
import java.awt.print.PageFormat;
import java.awt.print.Printable;
import java.awt.print.PrinterException;
import java.awt.print.PrinterJob;
import javax.print.attribute.HashPrintRequestAttributeSet;
import javax.print.attribute.PrintRequestAttributeSet;
import javax.swing.JButton;
import javax.swing.JComponent;
import javax.swing.JFrame;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
/**
* This program demonstrates how to print 2D graphics
* @version 1.12 2007-08-16
* @author Cay Horstmann
*/
public class PrintTest
{
public static void main(String[] args)
{
EventQueue.invokeLater(new Runnable()
{
public void run()
{
JFrame frame = new PrintTestFrame();
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setVisible(true);
}
});
}
}
/**
* This frame shows a panel with 2D graphics and buttons to print the graphics and to set up the
* page format.
*/
class PrintTestFrame extends JFrame
{
public PrintTestFrame()
{
setTitle("PrintTest");
setSize(DEFAULT_WIDTH, DEFAULT_HEIGHT);
canvas = new PrintComponent();
add(canvas, BorderLayout.CENTER);
attributes = new HashPrintRequestAttributeSet();
JPanel buttonPanel = new JPanel();
JButton printButton = new JButton("Print");
buttonPanel.add(printButton);
printButton.addActionListener(new ActionListener()
{
public void actionPerformed(ActionEvent event)
{
try
{
PrinterJob job = PrinterJob.getPrinterJob();
job.setPrintable(canvas);
if (job.printDialog(attributes)) job.print(attributes);
}
catch (PrinterException e)
{
JOptionPane.showMessageDialog(PrintTestFrame.this, e);
}
}
});
JButton pageSetupButton = new JButton("Page setup");
buttonPanel.add(pageSetupButton);
pageSetupButton.addActionListener(new ActionListener()
{
public void actionPerformed(ActionEvent event)
{
PrinterJob job = PrinterJob.getPrinterJob();
job.pageDialog(attributes);
}
});
add(buttonPanel, BorderLayout.NORTH);
}
private PrintComponent canvas;
private PrintRequestAttributeSet attributes;
private static final int DEFAULT_WIDTH = 300;
private static final int DEFAULT_HEIGHT = 300;
}
/**
* This component generates a 2D graphics image for screen display and printing.
*/
class PrintComponent extends JComponent implements Printable
{
public void paintComponent(Graphics g)
{
Graphics2D g2 = (Graphics2D) g;
drawPage(g2);
}
public int print(Graphics g, PageFormat pf, int page) throws PrinterException
{
if (page >= 1) return Printable.NO_SUCH_PAGE;
Graphics2D g2 = (Graphics2D) g;
g2.translate(pf.getImageableX(), pf.getImageableY());
g2.draw(new Rectangle2D.Double(0, 0, pf.getImageableWidth(), pf.getImageableHeight()));
drawPage(g2);
return Printable.PAGE_EXISTS;
}
/**
* This method draws the page both on the screen and the printer graphics context.
* @param g2 the graphics context
*/
public void drawPage(Graphics2D g2)
{
FontRenderContext context = g2.getFontRenderContext();
Font f = new Font("Serif", Font.PLAIN, 72);
GeneralPath clipShape = new GeneralPath();
TextLayout layout = new TextLayout("Hello", f, context);
AffineTransform transform = AffineTransform.getTranslateInstance(0, 72);
Shape outline = layout.getOutline(transform);
clipShape.append(outline, false);
layout = new TextLayout("World", f, context);
transform = AffineTransform.getTranslateInstance(0, 144);
outline = layout.getOutline(transform);
clipShape.append(outline, false);
g2.draw(clipShape);
g2.clip(clipShape);
final int NLINES = 50;
Point2D p = new Point2D.Double(0, 0);
for (int i = 0; i < NLINES; i++)
{
double x = (2 * getWidth() * i) / NLINES;
double y = (2 * getHeight() * (NLINES - 1 - i)) / NLINES;
Point2D q = new Point2D.Double(x, y);
g2.draw(new Line2D.Double(p, q));
}
}
}
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