Print Swing components : Print « 2D Graphics GUI « Java
Print Swing components
import java.awt.Color;
import java.awt.Component;
import java.awt.Dimension;
import java.awt.Event;
import java.awt.Font;
import java.awt.GradientPaint;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Paint;
import java.awt.Toolkit;
import java.awt.event.ActionEvent;
import java.awt.event.KeyEvent;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import java.awt.font.FontRenderContext;
import java.awt.font.LineMetrics;
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.swing.AbstractAction;
import javax.swing.JComponent;
import javax.swing.JFrame;
import javax.swing.JMenu;
import javax.swing.JMenuBar;
import javax.swing.KeyStroke;
public class SwingPrinter extends JFrame {
public static void main(String[] args) {
new SwingPrinter();
}
private PageFormat mPageFormat;
public SwingPrinter() {
super("SwingPrinter v1.0");
createUI();
PrinterJob pj = PrinterJob.getPrinterJob();
mPageFormat = pj.defaultPage();
setVisible(true);
}
protected void createUI() {
setSize(300, 300);
center();
// Add the menu bar.
JMenuBar mb = new JMenuBar();
JMenu file = new JMenu("File", true);
file.add(new FilePrintAction()).setAccelerator(
KeyStroke.getKeyStroke(KeyEvent.VK_P, Event.CTRL_MASK));
file.add(new FilePageSetupAction()).setAccelerator(
KeyStroke.getKeyStroke(KeyEvent.VK_P, Event.CTRL_MASK
| Event.SHIFT_MASK));
file.addSeparator();
file.add(new FileQuitAction()).setAccelerator(
KeyStroke.getKeyStroke(KeyEvent.VK_Q, Event.CTRL_MASK));
mb.add(file);
setJMenuBar(mb);
// Add the contents of the window.
getContentPane().add(new PatchworkComponent());
// Exit the application when the window is closed.
addWindowListener(new WindowAdapter() {
public void windowClosing(WindowEvent e) {
System.exit(0);
}
});
}
protected void center() {
Dimension screen = Toolkit.getDefaultToolkit().getScreenSize();
Dimension us = getSize();
int x = (screen.width - us.width) / 2;
int y = (screen.height - us.height) / 2;
setLocation(x, y);
}
public class FilePrintAction extends AbstractAction {
public FilePrintAction() {
super("Print");
}
public void actionPerformed(ActionEvent ae) {
PrinterJob pj = PrinterJob.getPrinterJob();
ComponentPrintable cp = new ComponentPrintable(getContentPane());
pj.setPrintable(cp, mPageFormat);
if (pj.printDialog()) {
try {
pj.print();
} catch (PrinterException e) {
System.out.println(e);
}
}
}
}
public class FilePageSetupAction extends AbstractAction {
public FilePageSetupAction() {
super("Page setup...");
}
public void actionPerformed(ActionEvent ae) {
PrinterJob pj = PrinterJob.getPrinterJob();
mPageFormat = pj.pageDialog(mPageFormat);
}
}
public class FileQuitAction extends AbstractAction {
public FileQuitAction() {
super("Quit");
}
public void actionPerformed(ActionEvent ae) {
System.exit(0);
}
}
}
class PatchworkComponent extends JComponent implements Printable {
private float mSide = 36;
private float mOffset = 36;
private int mColumns = 8;
private int mRows = 4;
private String mString = "Java Source and Support";
private Font mFont = new Font("Serif", Font.PLAIN, 64);
private Paint mHorizontalGradient, mVerticalGradient;
public PatchworkComponent() {
float x = mOffset;
float y = mOffset;
float halfSide = mSide / 2;
float x0 = x + halfSide;
float y0 = y;
float x1 = x + halfSide;
float y1 = y + (mRows * mSide);
mVerticalGradient = new GradientPaint(x0, y0, Color.darkGray, x1, y1,
Color.lightGray, true);
x0 = x;
y0 = y + halfSide;
x1 = x + (mColumns * mSide);
y1 = y + halfSide;
mHorizontalGradient = new GradientPaint(x0, y0, Color.darkGray, x1, y1,
Color.lightGray, true);
}
public PatchworkComponent(String s) {
this();
mString = s;
}
public void paintComponent(Graphics g) {
Graphics2D g2 = (Graphics2D) g;
g2.rotate(Math.PI / 24, mOffset, mOffset);
for (int row = 0; row < mRows; row++) {
for (int column = 0; column < mColumns; column++) {
float x = column * mSide + mOffset;
float y = row * mSide + mOffset;
if (((column + row) % 2) == 0)
g2.setPaint(mVerticalGradient);
else
g2.setPaint(mHorizontalGradient);
Rectangle2D r = new Rectangle2D.Float(x, y, mSide, mSide);
g2.fill(r);
}
}
FontRenderContext frc = g2.getFontRenderContext();
float width = (float) mFont.getStringBounds(mString, frc).getWidth();
LineMetrics lm = mFont.getLineMetrics(mString, frc);
float x = ((mColumns * mSide) - width) / 2 + mOffset;
float y = ((mRows * mSide) + lm.getAscent()) / 2 + mOffset;
g2.setFont(mFont);
g2.setPaint(Color.white);
g2.drawString(mString, x, y);
}
public int print(Graphics g, PageFormat pageFormat, int pageIndex) {
if (pageIndex != 0)
return NO_SUCH_PAGE;
paintComponent(g);
return PAGE_EXISTS;
}
}
class ComponentPrintable implements Printable {
private Component mComponent;
public ComponentPrintable(Component c) {
mComponent = c;
}
public int print(Graphics g, PageFormat pageFormat, int pageIndex) {
if (pageIndex > 0)
return NO_SUCH_PAGE;
Graphics2D g2 = (Graphics2D) g;
g2.translate(pageFormat.getImageableX(), pageFormat.getImageableY());
boolean wasBuffered = disableDoubleBuffering(mComponent);
mComponent.paint(g2);
restoreDoubleBuffering(mComponent, wasBuffered);
return PAGE_EXISTS;
}
private boolean disableDoubleBuffering(Component c) {
if (c instanceof JComponent == false)
return false;
JComponent jc = (JComponent) c;
boolean wasBuffered = jc.isDoubleBuffered();
jc.setDoubleBuffered(false);
return wasBuffered;
}
private void restoreDoubleBuffering(Component c, boolean wasBuffered) {
if (c instanceof JComponent)
((JComponent) c).setDoubleBuffered(wasBuffered);
}
}
