setUndecorated（true）为从JOptionPane实例创建的JDialog

问题描述

我目前有一个 JDialog 是通过从我的<$ c $实例调用 createDialog（）方法创建的c> JOptionPane ：

I currently have a JDialog created by calling the createDialog() method from my instance of JOptionPane:

JOptionPane pane = new JOptionPane(myPanel, JOptionPane.PLAIN_MESSAGE,JOptionPane.DEFAULT_OPTION, null, new Object[]{}, null);
dialog = pane.createDialog(null, "");

我希望能够从 JDialog中删除标题栏通过将 setUndecorated（true）调用到 JDialog ，但我得到 IllegalComponentStateException：当我尝试运行程序时，该对话框是可显示的异常。

I wanted to be able to remove the title bar from the JDialog by calling setUndecorated(true) onto the JDialog, but I get an IllegalComponentStateException: The dialog is displayable exception when I attempt to run my program.

据我所知，在调用 dialog.show（）之前，对话框没有显示，让我相信在通过 pane.createDialog（）实例化对话框时，对话框确实是可显示的远远超出了我对 JDialog的理解 API。

As far as I know, the dialog is not being displayed before I call dialog.show(), which leads me to believe that the dialog is indeed "displayable" upon instantiating the dialog through pane.createDialog() far beyond my understanding of the JDialog API.

在使用<$ c之前，我试图调用 setVisible（false） $ c> setUndecorated（true），但无济于事。

I have attempted to call setVisible(false) prior to using setUndecorated(true), but to no avail.

如果可以删除 JDialog 这种类型。从正常的 JDialog 中删除​​标题栏很容易，从许多其他类型问题的答案中可以看出，但我似乎无法让它为<$ $工作c $ c> JDialog 通过 createDialog（）创建。

Any help would be appreciated as to how or of it is possible at all to remove the title bar of a JDialog of this type. Removing the title bar from a normal JDialog is easy enough, as seen from numerous other answers to questions of this type, but I cannot seem to get it to work for a JDialog created through createDialog().

相关代码：

            input= new JTextField(50);

        input.addKeyListener(new ConsoleKeyListener());


        input.addAncestorListener( new RequestFocusListener() );
        field = new JTextArea();
        field.setEditable(false);
        field.setLineWrap(true);
        JScrollPane area = new JScrollPane(field, JScrollPane.VERTICAL_SCROLLBAR_ALWAYS, JScrollPane.HORIZONTAL_SCROLLBAR_NEVER);
        field.setRows(10);
        field.setText(consoleText);
        JPanel myPanel = new JPanel();

        myPanel.setLayout(new BorderLayout(0,0));
        myPanel.add(input, BorderLayout.PAGE_END);
        myPanel.add(area, BorderLayout.PAGE_START);
        input.setFocusable(true);
        input.requestFocus();
        int result = 101;
        //int result = JOptionPane.showOptionDialog(null, myPanel,"", JOptionPane.DEFAULT_OPTION,JOptionPane.PLAIN_MESSAGE, null, new Object[]{}, null);
        JOptionPane pane = new JOptionPane(myPanel, JOptionPane.PLAIN_MESSAGE, JOptionPane.DEFAULT_OPTION, null, new Object[]{}, null);

        dialog = pane.createDialog(null, "");
        dialog.setVisible(false);
        dialog.setUndecorated(true);
        //dialog.undecorated = true;


        //dialog.setOpacity(0.55f);
        removeMinMaxClose(dialog);
        removeMinMaxClose(pane);
        removeMinMaxClose(myPanel);
        dialog.getRootPane().setOpaque(false);

        //JDialog dialog = new JDialog();
        //dialog.setVisible(false);
        //dialog.setDefaultCloseOperation(WindowConstants.DO_NOTHING_ON_CLOSE);
        //myPanel.setUndecorated(true);
        //dialog.setUndecorated(true);
        //dialog.getRootPane().setWindowDecorationStyle(JRootPane.PLAIN_DIALOG);
        //dialog.setBounds( 100, 100, 300, 200 );
        dialog.addWindowListener(new WindowAdapter() {
            public void windowClosing(WindowEvent we) {
                System.out.println("yo");
            }
        });
        dialog.setVisible(true);
        dialog.show();

推荐答案

你需要阅读，然后有查看创建对话框的源代码

You need to read the JavaDoc entry on Component#isDisplayable, then have a look at the source code for create dialog

基本上对话框是作为 createDialog 方法的一部分打包的

Basically the dialog is packed as part of the createDialog method

可能的解决方案

可能的解决方案是创建自己的对话框......

A possible solution is to create your own dialog...

import java.awt.BorderLayout;
import java.awt.EventQueue;
import java.awt.Frame;
import java.beans.PropertyChangeEvent;
import java.beans.PropertyChangeListener;
import javax.swing.JDialog;
import javax.swing.JFrame;
import javax.swing.JOptionPane;
import javax.swing.UIManager;
import javax.swing.UnsupportedLookAndFeelException;

public class TestOptionPane11 {

    public static void main(String[] args) {
        new TestOptionPane11();
    }

    public TestOptionPane11() {
        EventQueue.invokeLater(new Runnable() {
            @Override
            public void run() {
                try {
                    UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
                } catch (ClassNotFoundException | InstantiationException | IllegalAccessException | UnsupportedLookAndFeelException ex) {
                }

                final JDialog dialog = new JDialog((Frame)null, "Boo");

                JOptionPane op = new JOptionPane("Look ma, no hands", JOptionPane.INFORMATION_MESSAGE, JOptionPane.OK_CANCEL_OPTION);
                op.addPropertyChangeListener(new PropertyChangeListener() {
                    @Override
                    public void propertyChange(PropertyChangeEvent evt) {
                        String name = evt.getPropertyName();
                        if ("value".equals(name)) {

                            dialog.dispose();

                        }
                    }
                });

                dialog.setUndecorated(true);
                dialog.setLayout(new BorderLayout());
                dialog.add(op);
                dialog.pack();
                dialog.setLocationRelativeTo(null);
                dialog.setVisible(true);
            }
        });
    }

}

这篇关于setUndecorated（true）为从JOptionPane实例创建的JDialog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！