如何打印带有摆动组件的JPanel？

Question

I am trying to print a JPanel using java.awt.print.I want to print out a JPanel.I have tried the following code which consists of only one button.When printed it appears on the left corner of the page,but I need to print it in the original position as it appears on the screen.Is there way to set bounds to give an exact position?

enter code here

import java.awt.*;
import java.awt.print.*;
import javax.swing.*;
import java.awt.event.*;

public class PrintButton extends JPanel implements
        Printable, ActionListener {

    JButton ok = new JButton("OK");

    public PrintButton() {
        ok.addActionListener(this);
        this.setPreferredSize(new Dimension(400, 400));
        this.add(ok);
        JFrame frame = new JFrame("Print");
        frame.getContentPane().add(this);
        frame.pack();
        frame.setVisible(true);
    }

    public static void main(String[] args) {
        new PrintButton();
    }

    public void actionPerformed(ActionEvent e) {


        PrinterJob printJob = PrinterJob.getPrinterJob();
        printJob.setPrintable(this);
        if (printJob.printDialog()) {
            try {
                printJob.print();
            } catch (Exception ex) {
                throw new RuntimeException(ex);
            }
        }
    }

    public int print(Graphics g, PageFormat pf, int index) throws
            PrinterException {

        Graphics2D g2 = (Graphics2D) g;
        if (index >= 1) {
            return Printable.NO_SUCH_PAGE;
        } else {

            ok.printAll(g2);
            return Printable.PAGE_EXISTS;
        }

    }
}

Answer 1

In your print method, you are only printing the button:

ok.printAll(g2);

To print the JPanel, you should call the printAll method of that JPanel:

this.printAll(g2);

If you want to be sure the panel fits on the page, you'll want to scale it using a Graphics2D transformation, based on the page size passed to you in the PageFormat object.

AffineTransform originalTransform = g2.getTransform();

double scaleX = pf.getImageableWidth() / this.getWidth();
double scaleY = pf.getImageableHeight() / this.getHeight();
// Maintain aspect ratio
double scale = Math.min(scaleX, scaleY);
g2.translate(pf.getImageableX(), pf.getImageableY());
g2.scale(scale, scale);
this.printAll(g2);

g2.setTransform(originalTransform);

Note: I haven't actually tested this.