使用setVisible(false)打印JFrame [英] Print JFrame with setVisible(false)
本文介绍了使用setVisible(false)打印JFrame的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我用2个JFrame窗口创建一个Swing应用程序，我想将第一帧作为主页.我在第一帧中设置了打印按钮以打印第二帧.
I create a Swing application with 2 JFrame windows and I want to 1st frame as main page. I set print button in 1st frame to print 2nd frame.
如何用frame.setVisible(false);打印第二帧?我该怎么解决?
How can I print the second frame with frame.setVisible(false);? How can I solve it?
我将代码放在下面:
package printuiwindow;
/**
*
* @author Saravanan Ponnusamy
*/
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import java.awt.print.*;
class PrintUIWindow implements Printable, ActionListener {
JFrame frameToPrint;
public int print(Graphics g, PageFormat pf, int page) throws
PrinterException {
if (page > 0) {
return NO_SUCH_PAGE;
}
Graphics2D g2d = (Graphics2D)g;
g2d.translate(pf.getImageableX(), pf.getImageableY()-55);
frameToPrint.print(g);
return 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) {
System.out.println(ex);
}
}
}
public PrintUIWindow(JFrame f) {
frameToPrint = f;
}
public static void main(String args[]) {
UIManager.put("swing.boldMetal", Boolean.FALSE);
JFrame f = new JFrame("Print UI Example");
f.addWindowListener(new WindowAdapter() {
public void windowClosing(WindowEvent e) {System.exit(0);}
});
//Printing frame design start
JFrame frame = new JFrame("Print UI Example");
JLabel label11=new JLabel("Selling Bill",JLabel.CENTER);
JLabel label21=new JLabel("Customer Name :",JLabel.LEFT);
JLabel label31=new JLabel("Buying Date :",JLabel.LEFT);
JLabel label41=new JLabel("Book Buyed :",JLabel.LEFT);
JLabel label51=new JLabel("Number :",JLabel.LEFT);
JLabel label61=new JLabel("Total Price :",JLabel.LEFT);
label11.setFont(new Font("Courier New", Font.BOLD, 13));
label21.setFont(new Font("Courier New", Font.BOLD, 13));
label31.setFont(new Font("Courier New", Font.BOLD, 13));
label41.setFont(new Font("Courier New", Font.BOLD, 13));
label51.setFont(new Font("Courier New", Font.BOLD, 13));
label61.setFont(new Font("Courier New", Font.BOLD, 13));
JPanel panel1=new JPanel();
panel1.setLayout(new GridLayout(6,1));
panel1.add(label11);
panel1.add(label21);
panel1.add(label31);
panel1.add(label41);
panel1.add(label51);
panel1.add(label61);
frame.setSize(300,300);
frame.setLocationRelativeTo(null);
frame.add(panel1,BorderLayout.CENTER);
panel1.setBackground(Color.WHITE);
frame.setResizable(false);
frame.setVisible(true);
//printing frame design end
//first frame design start
JLabel label1=new JLabel("Selling Bill",JLabel.CENTER);
JLabel label2=new JLabel("Customer Name :",JLabel.LEFT);
JLabel label3=new JLabel("Buying Date :",JLabel.LEFT);
JLabel label4=new JLabel("Book Buyed :",JLabel.LEFT);
JLabel label5=new JLabel("Number :",JLabel.LEFT);
JLabel label6=new JLabel("Total Price :",JLabel.LEFT);
label1.setFont(new Font("Courier New", Font.BOLD, 13));
label2.setFont(new Font("Courier New", Font.BOLD, 13));
label3.setFont(new Font("Courier New", Font.BOLD, 13));
label4.setFont(new Font("Courier New", Font.BOLD, 13));
label5.setFont(new Font("Courier New", Font.BOLD, 13));
label6.setFont(new Font("Courier New", Font.BOLD, 13));
JButton printButton = new JButton("Print This Window");
//print button code
printButton.addActionListener(new PrintUIWindow(frame));
JPanel panel=new JPanel();
panel.setLayout(new GridLayout(6,1));
panel.add(label1);
panel.add(label2);
panel.add(label3);
panel.add(label4);
panel.add(label5);
panel.add(label6);
f.setSize(300,300);
f.setLocationRelativeTo(null);
f.add(panel,BorderLayout.CENTER);
f.add(printButton,BorderLayout.SOUTH);
panel.setBackground(Color.WHITE);
f.setResizable(false);
f.setVisible(true);
}
}
推荐答案
我真的很讨厌打印组件，要么学会手工操作，要么使用Jasper Reports之类的东西.
How I hate printing components, seriously, either learn to do it by hand or use something like Jasper Reports.
您遇到了一系列问题...
You have a series of issues...
- 组件只能有一个父对象，因此，当您创建第二个窗口并将组件添加到其中时，您将从第一个窗口中删除它们.
- 您不能绘制不可见的组件；
- 您真的不应该打印框架，最好打印面板；
- 除非在屏幕上实现，否则您将负责确保在打印之前正确布置组件
您真的不想打印框架，而是实际上要打印面板，这要简单得多，而且您不会得到框架.如果还要打印框架，则需要使框架可见.
You really don't want to print the frame, you actually want to print the panel instead, it's just a lot simpler and you don't get the frame. If you want to print the frame as well, you will need to make the frame visible.
因此，基本上，这添加了一个简单的工厂方法来创建基础面板.这将使该面板成为两个实例，一个实例打印，一个实例显示(从技术上讲，您可以使用其中一个，但是您可以理解).
So, basically, this adds a simple factory method to create the base panel. This will make two instances of this panel, one to print and one to display (technically you could use one, but you get the idea).
在打印过程中，打印过程将更新面板的布局，以确保其内容正确放置，以便实际渲染它们.
The printing process will update the layout of the panel while it's printing to make sure that it's contents are properly laid, so that they are actually rendered.
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Font;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.print.PageFormat;
import java.awt.print.Printable;
import static java.awt.print.Printable.NO_SUCH_PAGE;
import static java.awt.print.Printable.PAGE_EXISTS;
import java.awt.print.PrinterException;
import java.awt.print.PrinterJob;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.UIManager;
class PrintUIWindow implements Printable, ActionListener {
JPanel frameToPrint;
boolean fill = false;
public int print(Graphics g, PageFormat pf, int page) throws
PrinterException {
if (page > 0) {
return NO_SUCH_PAGE;
}
double width = (int) Math.floor(pf.getImageableWidth());
double height = (int) Math.floor(pf.getImageableHeight());
if (!fill) {
width = Math.min(width, frameToPrint.getPreferredSize().width);
height = Math.min(height, frameToPrint.getPreferredSize().height);
}
System.out.println(width + "x" + height);
Graphics2D g2d = (Graphics2D) g;
g2d.translate(pf.getImageableX(), pf.getImageableY());
System.out.println(width + "x" + height);
frameToPrint.setBounds(0, 0, (int) Math.floor(width), (int) Math.floor(height));
if (frameToPrint.getParent() == null) {
frameToPrint.addNotify();
}
frameToPrint.validate();
frameToPrint.doLayout();
frameToPrint.printAll(g2d);
if (frameToPrint.getParent() != null) {
frameToPrint.removeNotify();
}
return 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) {
System.out.println(ex);
}
}
}
public PrintUIWindow(JPanel f) {
frameToPrint = f;
}
public static void forceLayout(JPanel panel) {
if (panel.getParent() == null) {
panel.addNotify();
}
panel.validate();
panel.doLayout();
if (panel.getParent() != null) {
panel.removeNotify();
}
}
public static JPanel makePanel() {
JLabel label11 = new JLabel("Selling Bill", JLabel.LEFT);
JLabel label21 = new JLabel("Customer Name :", JLabel.LEFT);
JLabel label31 = new JLabel("Buying Date :", JLabel.LEFT);
JLabel label41 = new JLabel("Book Buyed :", JLabel.LEFT);
JLabel label51 = new JLabel("Number :", JLabel.LEFT);
JLabel label61 = new JLabel("Total Price :", JLabel.LEFT);
label11.setFont(new Font("Courier New", Font.BOLD, 13));
label21.setFont(new Font("Courier New", Font.BOLD, 13));
label31.setFont(new Font("Courier New", Font.BOLD, 13));
label41.setFont(new Font("Courier New", Font.BOLD, 13));
label51.setFont(new Font("Courier New", Font.BOLD, 13));
label61.setFont(new Font("Courier New", Font.BOLD, 13));
JPanel panel1 = new JPanel();
panel1.setLayout(new GridLayout(6, 1));
panel1.add(label11);
panel1.add(label21);
panel1.add(label31);
panel1.add(label41);
panel1.add(label51);
panel1.add(label61);
panel1.setBackground(Color.WHITE);
return panel1;
}
public static void main(String args[]) {
UIManager.put("swing.boldMetal", Boolean.FALSE);
JFrame f = new JFrame("Print UI Example");
JButton printButton = new JButton("Print This Window");
JPanel toPrint = makePanel();
System.out.println(toPrint.getPreferredSize());
forceLayout(toPrint);
System.out.println(toPrint.getPreferredSize());
printButton.addActionListener(new PrintUIWindow(toPrint));
JPanel panel = makePanel();
f.add(panel, BorderLayout.CENTER);
f.add(printButton, BorderLayout.SOUTH);
f.pack();
f.setLocationRelativeTo(null);
f.setVisible(true);
System.out.println(panel.getPreferredSize());
System.out.println(panel.getSize());
}
}
这篇关于使用setVisible(false)打印JFrame的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
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