//********************************************************************
//  JukeBoxControls.java       Author: Lewis and Loftus
//
//  Demonstrates the use of a combo box.
//********************************************************************

import java.awt.*;
import java.awt.event.*;
import java.applet.*;
import javax.swing.*;
import java.net.URL;

public class JukeBoxControls extends JFrame
{
   private JLabel titleLabel;
   private JComboBox musicCombo;
   private JButton stopButton, playButton;
   private JPanel appPanel, buttonPanel;
   private AudioClip[] music;
   private AudioClip current;

   //-----------------------------------------------------------------
   //  Sets up the JukeBox GUI.
   //-----------------------------------------------------------------
   public JukeBoxControls()
   {
      super ("Java Juke Box");
      setSize (300, 200);

      try
      {
         music = new AudioClip[7];
         music[0] = null;  // Corresponds to "Make a Selection..."
         music[1] = Applet.newAudioClip (
            new URL("file", "localhost", "westernBeat.wav"));
         music[2] = Applet.newAudioClip (
            new URL("file", "localhost", "classical.wav"));
         music[3] = Applet.newAudioClip (
            new URL("file", "localhost", "jeopardy.au"));
         music[4] = Applet.newAudioClip (
            new URL("file", "localhost", "newAgeRythm.wav"));
         music[5] = Applet.newAudioClip (
            new URL("file", "localhost", "eightiesJam.wav"));
         music[6] = Applet.newAudioClip (
            new URL("file", "localhost", "hitchcock.wav"));
      }
      catch (Exception exception) {}

      titleLabel = new JLabel ("Java Juke Box");
      titleLabel.setAlignmentX (Component.CENTER_ALIGNMENT);

      // Create the list of strings for the combo box options.
      String[] musicNames = {"Make A Selection...", "Western Beat",
               "Classical Melody", "Jeopardy Theme", "New Age Rythm",
               "Eighties Jam", "Alfred Hitchcock's Theme"};

      musicCombo = new JComboBox (musicNames);
      musicCombo.setAlignmentX (Component.CENTER_ALIGNMENT);

      playButton = new JButton ("Play", new ImageIcon ("play.gif"));
      playButton.setBackground (Color.white);
      stopButton = new JButton ("Stop", new ImageIcon ("stop.gif"));
      stopButton.setBackground (Color.white);

      buttonPanel = new JPanel();
      buttonPanel.setLayout(new BoxLayout(buttonPanel, BoxLayout.X_AXIS));
      buttonPanel.add (playButton);
      buttonPanel.add (Box.createRigidArea (new Dimension(5,0)));
      buttonPanel.add (stopButton);
      buttonPanel.setBackground (Color.cyan);

      appPanel = new JPanel();
      appPanel.setLayout (new BoxLayout(appPanel, BoxLayout.Y_AXIS));
      appPanel.add (titleLabel);
      appPanel.add (Box.createRigidArea (new Dimension(0,5)));
      appPanel.add (musicCombo);
      appPanel.add (Box.createRigidArea (new Dimension(0,5)));
      appPanel.add (buttonPanel);
      appPanel.setBackground (Color.cyan);

      setContentPane (appPanel);

      musicCombo.addActionListener (new JukeBoxListener());
      stopButton.addActionListener (new JukeBoxListener());
      playButton.addActionListener (new JukeBoxListener());

      current = null;
   }

   //*****************************************************************
   //  An inner class to handle the various events of the juke box.
   //*****************************************************************
   private class JukeBoxListener implements ActionListener
   {
      //--------------------------------------------------------------
      //  Handles the play and stop buttons and the combo box.
      //--------------------------------------------------------------
      public void actionPerformed (ActionEvent event)
      {
         if (current != null)  // Stop current clip no matter what
            current.stop();

         Object source = event.getSource();
         if (source == playButton)
         {
            if (current != null)
               current.play();
         }
         else if (source == musicCombo)
            current = music[musicCombo.getSelectedIndex()];
      }
   }
}