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SwingUtilities.updateComponentTreeUI()不更改JFrames标题栏

look-and-feel swing java

lineage · 技术社区 · 7 年前

环境:

使用Netbeans 8.1

Oracle JDK 1.8版

赢得10场比赛

上下文:

一个带有JCheckBoxMenuItem的GUI,可以在运行时更改LookAndFeel(LAF)。

达拉夫= JTattoo 高保真激光

defaultLAF=Sun的Windows LAF(com.Sun.java.swing.plaf.Windows.WindowsLookAndFeel)

问题:

GUI使用defaultLAF启动(在EDT中)。用户更改为darkLAF..标题栏应该已经更改..它没有。
当用户切换回defaultLAF时,JMenuItems(文件和编辑)显示的是灰色背景,而不是defaultLAF样式。

截图:

代码:

在JCheckBoxMenuItem的itemStateChangeListener中

try{
   if (checkBox.isSelected())                                                                 
      UIManager.setLookAndFeel(darkLookAndFeel);
   else
    UIManager.setLookAndFeel(defaultLookAndFeel);


} catch (UnsupportedLookAndFeelException ex) {
   //handle err
}

//GUI is a class extending JFrame        
SwingUtilities.updateComponentTreeUI(this);
//some JFileChooser
SwingUtilities.updateComponentTreeUI(fc);

pack();

捕获:

不应要求用户重新启动GUI。

1 回复 | 直到 7 年前

Sergiy Medvynskyy 7 年前

有点难,但我找到了解决办法。

您需要切换到JTatto L&F的步骤

丢弃窗口
设置L&F
将根窗格的窗口样式设置为 JRootPane.FRAME
更新用户界面
使框架不装饰
使框架可见

切换回Windows L&F所需的步骤

丢弃窗口
设置L&F
更新用户界面
装裱
使框架可见

这是密码

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;

public class MinFrame extends JFrame {

    public MinFrame() {
        super("Minimal-Frame-Application");

        // setup menu
        JMenuBar menuBar = new JMenuBar();
        JMenu menu = new JMenu("File");
        menu.setMnemonic('F');
        JMenuItem menuItem = new JMenuItem("Exit");
        menuItem.setMnemonic('x');
        menuItem.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_F4, KeyEvent.ALT_MASK));
        menuItem.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent event) {
                System.exit(0);
            }
        });
        menu.add(menuItem);
        menuBar.add(menu);
        setJMenuBar(menuBar);

        // setup widgets
        JPanel contentPanel = new JPanel(new BorderLayout());
        contentPanel.setBorder(BorderFactory.createEmptyBorder(0, 4, 4, 4));
        JScrollPane westPanel = new JScrollPane(new JTree());
        JEditorPane editor = new JEditorPane("text/plain", "Hello World");
        JScrollPane eastPanel = new JScrollPane(editor);
        JSplitPane splitPane = new JSplitPane(JSplitPane.HORIZONTAL_SPLIT, true, westPanel,eastPanel);
        splitPane.setDividerLocation(148);
        contentPanel.add(splitPane, BorderLayout.CENTER);


        AbstractButton winLF = new JButton("Windows");
        winLF.addActionListener(new ActionListener() {

            @Override
            public void actionPerformed(ActionEvent e) {
                try {
                    MinFrame.this.dispose();
                    UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
                    SwingUtilities.updateComponentTreeUI(MinFrame.this.getRootPane());

                    MinFrame.this.setUndecorated(false);
                    MinFrame.this.setVisible(true);
                } catch (Exception ex) {
                    ex.printStackTrace();
                }
            }
        });
        AbstractButton customLF = new JButton("JTatto");
        customLF.addActionListener(new ActionListener() {

            @Override
            public void actionPerformed(ActionEvent e) {
                try {
                    MinFrame.this.dispose();
                    UIManager.setLookAndFeel("com.jtattoo.plaf.smart.SmartLookAndFeel");
                    MinFrame.this.getRootPane().setWindowDecorationStyle(JRootPane.FRAME);
                    SwingUtilities.updateComponentTreeUI(MinFrame.this.getRootPane());

                    MinFrame.this.setUndecorated(true);
                    MinFrame.this.setVisible(true);
                } catch (Exception ex) {
                    ex.printStackTrace();
                }
            }
        });

        JPanel buttons = new JPanel();
        buttons.add(winLF);
        buttons.add(customLF);
        contentPanel.add(buttons, BorderLayout.SOUTH);
        setContentPane(contentPanel);

        // add listeners
        addWindowListener(new WindowAdapter() {
            public void windowClosing(WindowEvent e) {
                System.exit(0);
            }
        });

        // show application
        setLocation(32, 32);
        setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
        setSize(400, 300);
        setVisible(true);
    } // end CTor MinFrame

    public static void main(String[] args) {
        try {
            // select Look and Feel
//            UIManager.setLookAndFeel("com.jtattoo.plaf.smart.SmartLookAndFeel");
            // start application
            new MinFrame();
        }
        catch (Exception ex) {
            ex.printStackTrace();
        }
    } // end main

}