[英]How to show/hide JPanels in a JFrame?
The application I am developing is a game. 我正在开发的应用程序是一个游戏。 What I want to do is have JPanels that appear in the JFrame, like a text or message window, and then disappear when they are no longer used.
我想要做的是让JPanels出现在JFrame中,就像文本或消息窗口一样,然后在不再使用时消失。 I have designed these JPanels in Netbeans as external classes and want to be able to call them in an actionPerformed() method.
我已经在Netbeans中将这些JPanel设计为外部类,并希望能够在actionPerformed()方法中调用它们。 JOptionPanes or other popup dialogs are not an option because they take the focus away from the game.
JOptionPanes或其他弹出对话框不是一个选项,因为它们将焦点从游戏中移开。 I also saw someone suggest a CardLayout in a similar question.
我也看到有人在类似的问题上建议使用CardLayout。 This is not what I want because I am not just trying to swap the panes.
这不是我想要的,因为我不只是试图交换窗格。 They should go away when the program tells them to.
当程序告诉他们时,它们应该消失。 How would I do this, say by binding it to a JButton Action?
我怎么做,比如将它绑定到JButton Action?
You can hide a JPanel by calling setVisible(false)
. 您可以通过调用
setVisible(false)
来隐藏JPanel。 For example: 例如:
public static void main(String args[]){
JFrame f = new JFrame();
f.setLayout(new BorderLayout());
final JPanel p = new JPanel();
p.add(new JLabel("A Panel"));
f.add(p, BorderLayout.CENTER);
//create a button which will hide the panel when clicked.
JButton b = new JButton("HIDE");
b.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e){
p.setVisible(false);
}
});
f.add(b,BorderLayout.SOUTH);
f.pack();
f.setVisible(true);
}
/*
* To change this template, choose Tools | Templates
* and open the template in the editor.
*/
/*
* Style1.java
*
* Created on May 5, 2011, 6:31:16 AM
*/
package Test;
import javax.swing.JButton;
import javax.swing.JFileChooser;
import javax.swing.JOptionPane;
/**
*
* @author Sameera
*/
public class Style2 extends javax.swing.JFrame {
/** Creates new form Style1 */
public Style2() {
initComponents();
}
/** This method is called from within the constructor to
* initialize the form.
* WARNING: Do NOT modify this code. The content of this method is
* always regenerated by the Form Editor.
*/
@SuppressWarnings("unchecked")
// <editor-fold defaultstate="collapsed" desc="Generated Code">
private void initComponents() {
jPanel1 = new javax.swing.JPanel();
cmd_SH = new javax.swing.JButton();
pnl_2 = new javax.swing.JPanel();
setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
jPanel1.setBorder(javax.swing.BorderFactory.createLineBorder(new java.awt.Color(0, 0, 0)));
cmd_SH.setText("Hide");
cmd_SH.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
cmd_SHActionPerformed(evt);
}
});
javax.swing.GroupLayout jPanel1Layout = new javax.swing.GroupLayout(jPanel1);
jPanel1.setLayout(jPanel1Layout);
jPanel1Layout.setHorizontalGroup(
jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(javax.swing.GroupLayout.Alignment.TRAILING, jPanel1Layout.createSequentialGroup()
.addContainerGap(558, Short.MAX_VALUE)
.addComponent(cmd_SH)
.addContainerGap())
);
jPanel1Layout.setVerticalGroup(
jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(javax.swing.GroupLayout.Alignment.TRAILING, jPanel1Layout.createSequentialGroup()
.addContainerGap(236, Short.MAX_VALUE)
.addComponent(cmd_SH)
.addContainerGap())
);
pnl_2.setBorder(javax.swing.BorderFactory.createLineBorder(new java.awt.Color(0, 0, 0)));
javax.swing.GroupLayout pnl_2Layout = new javax.swing.GroupLayout(pnl_2);
pnl_2.setLayout(pnl_2Layout);
pnl_2Layout.setHorizontalGroup(
pnl_2Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGap(0, 621, Short.MAX_VALUE)
);
pnl_2Layout.setVerticalGroup(
pnl_2Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGap(0, 270, Short.MAX_VALUE)
);
javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
getContentPane().setLayout(layout);
layout.setHorizontalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addContainerGap()
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addComponent(jPanel1, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
.addComponent(pnl_2, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
.addContainerGap())
);
layout.setVerticalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addContainerGap()
.addComponent(jPanel1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)
.addComponent(pnl_2, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
.addContainerGap(17, Short.MAX_VALUE))
);
pack();
}// </editor-fold>
private void cmd_SHActionPerformed(java.awt.event.ActionEvent evt) {
System.out.println(evt.getActionCommand());
if (evt.getActionCommand().equals("Hide")) {
pnl_2.setVisible(false);
cmd_SH.setText("Show");
this.setSize(643, 294);
this.pack();
}
if (evt.getActionCommand().equals("Show")) {
pnl_2.setVisible(true);
cmd_SH.setText("Hide");
this.setSize(643, 583);
this.pack();
}
}
/**
* @param args the command line arguments
*/
public static void main(String args[]) {
java.awt.EventQueue.invokeLater(new Runnable() {
public void run() {
new Style1().setVisible(true);
}
});
}
// Variables declaration - do not modify
private javax.swing.JButton cmd_SH;
private javax.swing.JPanel jPanel1;
private javax.swing.JPanel pnl_2;
// End of variables declaration
}
调用parent.remove(panel)
,其中parent
是您希望框架所在的容器, panel
是您要添加的面板。
If you want to hide panel on button click, write below code in JButton Action. 如果要在按钮单击时隐藏面板,请在JButton Action中写下以下代码。 I assume you want to hide jpanel1.
我假设你想要隐藏jpanel1。
jpanel1.setVisible(false);
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