Source Code : Using SwingUtilities.updateComponentTreeUI to update UI by platform settings

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Using SwingUtilities.updateComponentTreeUI to update UI by platform settings

  

/*
   This program is a part of the companion code for Core Java 8th ed.
   (http://horstmann.com/corejava)

   This program is free software: you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation, either version 3 of the License, or
   (at your option) any later version.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program.  If not, see <http://www.gnu.org/licenses/>.
*/

import java.awt.EventQueue;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.SwingUtilities;
import javax.swing.UIManager;

/**
 * @version 1.32 2007-06-12
 * @author Cay Horstmann
 */
public class PlafTest
{
   public static void main(String[] args)
   {
      EventQueue.invokeLater(new Runnable()
         {
            public void run()
            {
               PlafFrame frame = new PlafFrame();
               frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
               frame.setVisible(true);
            }
         });
   }
}

/**
 * A frame with a button panel for changing look and feel
 */
class PlafFrame extends JFrame
{
   public PlafFrame()
   {
      setTitle("PlafTest");
      setSize(DEFAULT_WIDTH, DEFAULT_HEIGHT);

      buttonPanel = new JPanel();
      
      UIManager.LookAndFeelInfo[] infos = UIManager.getInstalledLookAndFeels();
      for (UIManager.LookAndFeelInfo info : infos)
         makeButton(info.getName(), info.getClassName());
      
      add(buttonPanel);
   }

   /**
    * Makes a button to change the pluggable look and feel.
    * @param name the button name
    * @param plafName the name of the look and feel class
    */
   void makeButton(String name, final String plafName)
   {
      // add button to panel

      JButton button = new JButton(name);
      buttonPanel.add(button);

      // set button action

      button.addActionListener(new ActionListener()
         {
            public void actionPerformed(ActionEvent event)
            {
               // button action: switch to the new look and feel
               try
               {
                  UIManager.setLookAndFeel(plafName);
                  SwingUtilities.updateComponentTreeUI(PlafFrame.this);
               }
               catch (Exception e)
               {
                  e.printStackTrace();
               }
            }
         });
   }

   private JPanel buttonPanel;
   
   public static final int DEFAULT_WIDTH = 300;
   public static final int DEFAULT_HEIGHT = 200;
}

   
    
  

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