java - Printable 打印整个框架而不是内容

Question

我想打印 BufferedImage，我不知道如何打印，所以我尝试打印所有内容。
代码似乎工作正常，除了它还打印框架的边框和打印按钮，而不仅仅是预期的内容。
而且由于某种原因，质量变得很糟糕。

这是我为其编写的代码:

package frik.main;

import java.awt.Color;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.image.BufferedImage;
import java.awt.print.PageFormat;
import java.awt.print.Printable;
import java.awt.print.PrinterException;
import java.awt.print.PrinterJob;

import javax.swing.ImageIcon;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.UIManager;

import java.awt.event.*;

import javax.swing.*;
import frik.data.Config;
import frik.utils.ImgUtil;

public class Previewer implements Config, Printable, ActionListener{

    private JFrame Frame;
    private JPanel ImagePanel;
    private JLabel PicLabel;
    private JButton PrintButton;
    private static BufferedImage before;
    private static boolean Scaled;

    public Previewer(BufferedImage Image, boolean scaled){
        this.before = Image;
        this.Scaled = scaled;
        loop();

    }

    public int print(Graphics g, PageFormat pf, int page) throws PrinterException{
        if (page > 0) { 
            return Printable.NO_SUCH_PAGE;
        }
        Graphics2D g2d = (Graphics2D)g;
        g2d.translate(pf.getImageableX(), pf.getImageableY());

        Frame.printAll(g);

        return Printable.PAGE_EXISTS;
    }

    public void actionPerformed(ActionEvent e){
        PrinterJob job = PrinterJob.getPrinterJob();
        job.setPrintable(this);
        boolean ok = job.printDialog();
        if (ok) {
            try {
                job.print();
            } catch (PrinterException ex) {
                JOptionPane.showMessageDialog(null, "The Printjob did not successfully complete.", "Print Failure.", JOptionPane.WARNING_MESSAGE);
            }
        }
    }

    public void loop(){
        UIManager.put("swing.boldMetal", Boolean.FALSE);
        Frame = new JFrame("Mold Preview");
        ImagePanel = new JPanel();
        PrintButton = new JButton("Print Mold");

        Frame.addWindowListener(new WindowAdapter() {
               public void windowClosing(WindowEvent e) {System.exit(0);}
            });

        if(Scaled){
            PicLabel = new JLabel(new ImageIcon(ImgUtil.scaleImage(PAPER_WIDTH / 3, PAPER_HEIGHT / 3, before)));
        }else if (!Scaled){
            PicLabel = new JLabel(new ImageIcon(before));
        }

        ImagePanel.setBackground(Color.orange);
        ImagePanel.add(PicLabel);
        Frame.add("Center", ImagePanel);

        PrintButton.addActionListener(this);
        Frame.add("North", PrintButton);

        Frame.pack();
        Frame.setVisible(true);
        Frame.setResizable(false);

    }

    public static void main(String args[]){
        new Previewer(before, Scaled);
        //////////////////////////////
    }
}

因此，如果有人可以帮助我仅打印 BufferedImage，或者仅打印包含 BufferedImage 的 ImageIcon，那就太好了。

Answer 1

首先，如果您只关心打印图像，为什么要调用 Frame.printAll(g) 呢？不要这样做，只需尝试绘制图像:

g.drawImage(Image, x, y, null);