问题描述
我现在有一个发送HTTP请求的SwingWorker,并且我重写了SwingWorker的done()方法来更改JFrame中的内容.我想基本上删除所有内容,并根据从服务器返回的值在JFrame上添加一个新的成员面板.
I currrently have a SwingWorker that sends a HTTP Request and I override the SwingWorker's done() method to change contents in a JFrame. I want to basically remove everything and add a new members panel on the JFrame depending on the values returned from the Server.
现在,我面临的问题是,当我在JFrame上调用以下方法时,它不会从JFrame中删除任何内容,也不会更改它在Frame中包含的内容.
Now, the problem I am facing is that when I invoke the following methods below on the JFrame, it doesn't remove anything from the JFrame nor does it change it's contents contained within the Frame.
//TODO: Investigate why JFrame content pane won't repaint.
f.removeAll();
//Pass the frame f reference only into MainDisplay, it doesn't actually do anything apart from allowing a class to add a JMenuBar on the JFrame.
f.add(new MainDisplay(f));
f.getContentPane().invalidate();
f.getContentPane().validate();
f.getContentPane().repaint();
我当前的修复方法是在下面,但是我宁愿更改JFrame的内容,而不是加载一个新的修复程序.
The current fix I have is this below but I would rather change the contents of the JFrame rather then loading a new one up.
f.dispose();
f=new ApplicationFrame();
我在这里和Google上浏览了以前的答案,并且某些状态在调用repaint()重新绘制JFrame时使用了validate()或invalidate().
I've looked through previous answers on here and on Google and some state use validate() or invalidate() whilst calling repaint() to repaint the JFrame.
任何建议/帮助将不胜感激.
Any suggestions/help would be much appreciated.
我想我要进行更多调试,因为肯定还有其他问题.
I think I am going to debug more since there must be something else going wrong.
推荐答案
例如
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class MyFrame extends JFrame {
private static final long serialVersionUID = 1L;
public MyFrame() {
final JPanel parentPanel = new JPanel();
parentPanel.setLayout(new BorderLayout(10, 10));
final JPanel childPanel1 = new JPanel();
childPanel1.setBackground(Color.red);
childPanel1.setPreferredSize(new Dimension(300, 40));
final JPanel childPanel2 = new JPanel();
childPanel2.setBackground(Color.blue);
childPanel2.setPreferredSize(new Dimension(800, 600));
JButton myButton = new JButton("Add Component ");
myButton.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
parentPanel.remove(childPanel1);
parentPanel.add(childPanel2, BorderLayout.CENTER);
parentPanel.revalidate();
parentPanel.repaint();
pack();
}
});
setTitle("My Empty Frame");
setLocation(10, 200);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
parentPanel.add(childPanel1, BorderLayout.CENTER);
parentPanel.add(myButton, BorderLayout.SOUTH);
add(parentPanel);
pack();
setVisible(true);
}
public static void main(String[] args) {
SwingUtilities.invokeLater(new Runnable() {
@Override
public void run() {
MyFrame myFrame = new MyFrame();
}
});
}
}
这篇关于JFrame删除JPanels并添加新的JPanel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!