/*
 * LnFListener.java
 * A listener that can swing the look and feel of a frame based on
 * the actionCommand of an ActionEvent object.
 * Supported look and feels are:
 *  * Metal
 *  * Windows
 *  * Motif 
 */

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

public class LnFListener implements ActionListener {
  Frame frame;

  public LnFListener(Frame f) {
    frame = f;
  }

  public void actionPerformed(ActionEvent e) {
    String lnfName = null;

    if (e.getActionCommand().equals("Metal")) {
      lnfName = "javax.swing.plaf.metal.MetalLookAndFeel";
    } else if (e.getActionCommand().equals("Motif")) {
      lnfName = "com.sun.java.swing.plaf.motif.MotifLookAndFeel";
    } else {
      lnfName = "com.sun.java.swing.plaf.windows.WindowsLookAndFeel";
    }

    try {
      UIManager.setLookAndFeel(lnfName);
      SwingUtilities.updateComponentTreeUI(frame);
    }
    catch (UnsupportedLookAndFeelException ex1) {
      System.err.println("Unsupported LookAndFeel: " + lnfName);
    }
    catch (ClassNotFoundException ex2) {
      System.err.println("LookAndFeel class not found: " + lnfName);
    }
    catch (InstantiationException ex3) {
      System.err.println("Could not load LookAndFeel: " + lnfName);
    }
    catch (IllegalAccessException ex4) {
      System.err.println("Cannot use LookAndFeel: " + lnfName);
    }
  }
}