我有 JFrame 和一个按钮,它在点击事件时打开一个 JPopupMenu。这个 JPopupMenu 有一个 JPanel,里面有一个按钮。这个按钮应该处理 JPopupMenu。只要 JFrame 未最大化,它就会执行此操作。但是,当 JFrame 最大化时,它会关闭 Jframe 本身。
任何有关解决此问题的帮助或指示将不胜感激。
(我正在使用 netbeans 来开发它。)
//Demo.Java
public class Demo extends javax.swing.JFrame {
public JPopupMenu menu1;
public Demo() {
initComponents();
menu1 = new JPopupMenu();
menu1.add(new MyJPanel());
}
@SuppressWarnings("unchecked")
private void initComponents() {
jButton1 = new javax.swing.JButton();
setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
jButton1.setText("Open JPopupMenu");
jButton1.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jButton1ActionPerformed(evt);
}
});
javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
getContentPane().setLayout(layout);
layout.setHorizontalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addGap(53, 53, 53)
.addComponent(jButton1)
.addContainerGap(224, Short.MAX_VALUE))
);
layout.setVerticalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addGap(85, 85, 85)
.addComponent(jButton1)
.addContainerGap(192, Short.MAX_VALUE))
);
pack();
}
private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {
menu1.show(jButton1,0,0);
}
public static void main(String args[]) {
java.awt.EventQueue.invokeLater(new Runnable() {
public void run() {
new Demo().setVisible(true);
}
});
}
// Variables declaration - do not modify
private javax.swing.JButton jButton1;
// End of variables declaration
}
下面是 MyJpanel 的代码。
// MyJPanel.java
package demo;
import java.awt.Window;
import javax.swing.SwingUtilities;
public class MyJPanel extends javax.swing.JPanel {
public MyJPanel() {
initComponents();
}
@SuppressWarnings("unchecked")
private void initComponents() {
jTabbedPane1 = new javax.swing.JTabbedPane();
jPanel1 = new javax.swing.JPanel();
jButton1 = new javax.swing.JButton();
jPanel2 = new javax.swing.JPanel();
jButton1.setText("Close jPopupMenu");
jButton1.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jButton1ActionPerformed(evt);
}
});
javax.swing.GroupLayout jPanel1Layout = new javax.swing.GroupLayout(jPanel1);
jPanel1.setLayout(jPanel1Layout);
jPanel1Layout.setHorizontalGroup(
jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(jPanel1Layout.createSequentialGroup()
.addGap(82, 82, 82)
.addComponent(jButton1)
.addContainerGap(192, Short.MAX_VALUE))
);
jPanel1Layout.setVerticalGroup(
jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(jPanel1Layout.createSequentialGroup()
.addGap(122, 122, 122)
.addComponent(jButton1)
.addContainerGap(127, Short.MAX_VALUE))
);
jButton1.getAccessibleContext().setAccessibleName("closeParent");
jTabbedPane1.addTab("tab1", jPanel1);
javax.swing.GroupLayout jPanel2Layout = new javax.swing.GroupLayout(jPanel2);
jPanel2.setLayout(jPanel2Layout);
jPanel2Layout.setHorizontalGroup(
jPanel2Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGap(0, 395, Short.MAX_VALUE)
);
jPanel2Layout.setVerticalGroup(
jPanel2Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGap(0, 272, Short.MAX_VALUE)
);
jTabbedPane1.addTab("tab2", jPanel2);
javax.swing.GroupLayout layout = new javax.swing.GroupLayout(this);
this.setLayout(layout);
layout.setHorizontalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addComponent(jTabbedPane1, javax.swing.GroupLayout.DEFAULT_SIZE, 400, Short.MAX_VALUE)
);
layout.setVerticalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addComponent(jTabbedPane1)
);
}
private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {
Window w = SwingUtilities.getWindowAncestor(MyJPanel.this);
w.dispose();
}
// Variables declaration - do not modify
private javax.swing.JButton jButton1;
private javax.swing.JPanel jPanel1;
private javax.swing.JPanel jPanel2;
private javax.swing.JTabbedPane jTabbedPane1;
// End of variables declaration
}