电子商务网站开发实务石道元/站长是什么级别
我遇到的情况是我显示一个对话框,用户必须填写一些菜单,然后按OK.它工作正常,但是现在我在此对话框上有另一个按钮,如果用户想要添加某些值,我希望弹出另一个对话框,在该对话框中用户填写附加值,然后按“确定”,此对话框消失,用户回到主菜单.对话.
我已经尝试过了,但是每次我调用新对话框时,焦点都不会偏离主对话框,我该怎么做这样的任务.
有没有相关的例子,或者做这种事情的正确方法是什么？
编辑：
public static class EdgeMenu extends JPopupMenu {
// private JFrame frame;
public MyMenu(final JFrame frame) {
super("My Menu");
// this.frame = frame;
this.addSeparator();
this.add(new EdgePropItem(frame));
}
}
//this shows the first dialog, another class because i have some other
//functions to be performed here
public static class EdgePropItem extends JMenuItem{
//...
public EdgePropItem(final JFrame frame) {
super("Edit Properties");
this.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
EdgePropertyDialog dialog = new EdgePropertyDialog(frame, edge);
dialog.setVisible(true);
}
});
}
}
现在在其他对话框中,在按钮甚至监听器中,我试图调用另一个对话框：
private void newDialogHandler(java.awt.event.ActionEvent evt) {
MyNewDialog rdialog = new MyNewDialog(edge);
rdialog.setVisible(true);
}
它看起来不错,但是上一个对话框没有离开焦点,并且只有当我在该对话框上按完成/完成时,它才会消失,我想要的是新对话框成为焦点,而在此处按“确定”时,焦点应该回到旧的主对话框,但这不起作用吗？
最佳答案
也许这段代码可以说明您的问题,
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class SuperConstructor extends JFrame {
private static final long serialVersionUID = 1L;
public SuperConstructor() {
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setPreferredSize(new Dimension(300, 300));
setTitle("Super constructor");
Container cp = getContentPane();
JButton b = new JButton("Show dialog");
b.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent evt) {
FirstDialog firstDialog = new FirstDialog(SuperConstructor.this);
}
});
cp.add(b, BorderLayout.SOUTH);
JButton bClose = new JButton("Close");
bClose.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent evt) {
System.exit(0);
}
});
add(bClose, BorderLayout.NORTH);
pack();
setVisible(true);
}
public static void main(String args[]) {
EventQueue.invokeLater(new Runnable() {
@Override
public void run() {
SuperConstructor superConstructor = new SuperConstructor();
}
});
}
private class FirstDialog extends JDialog {
private static final long serialVersionUID = 1L;
FirstDialog(final Frame parent) {
super(parent, "FirstDialog");
setPreferredSize(new Dimension(200, 200));
setLocationRelativeTo(parent);
setDefaultCloseOperation(JDialog.DISPOSE_ON_CLOSE);
setModalityType(Dialog.ModalityType.DOCUMENT_MODAL);
JButton bNext = new JButton("Show next dialog");
bNext.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent evt) {
SecondDialog secondDialog = new SecondDialog(parent, false);
}
});
add(bNext, BorderLayout.NORTH);
JButton bClose = new JButton("Close");
bClose.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent evt) {
setVisible(false);
}
});
add(bClose, BorderLayout.SOUTH);
pack();
setVisible(true);
}
}
private int i;
private class SecondDialog extends JDialog {
private static final long serialVersionUID = 1L;
SecondDialog(final Frame parent, boolean modal) {
//super(parent); // < --- Makes this dialog
//unfocusable as long as FirstDialog is visible
setPreferredSize(new Dimension(200, 200));
setLocation(300, 50);
setModal(modal);
setDefaultCloseOperation(JDialog.DISPOSE_ON_CLOSE);
setTitle("SecondDialog " + (i++));
JButton bClose = new JButton("Close");
bClose.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent evt) {
setVisible(false);
}
});
add(bClose, BorderLayout.SOUTH);
pack();
setVisible(true);
}
}
}