package test.gui;
 
import org.apache.log4j.Category;
import org.apache.log4j.BasicConfigurator;
 
import javax.swing.JFrame;
import javax.swing.JComboBox;
 
import java.awt.Container;
import java.awt.GridLayout;
 
import java.awt.event.*;
 
/**
  * The purpose of this class is to show the usage of ItemStateChange.
  * 
  * @see http://www.cs.cf.ac.uk/Dave/HCI/HCI_Handout_CALLER/node115.html#SECTION000106000000000000000
  * 
  * This code is free of any copyright. Just reference the author and 
  * his sources for the sake of ...
  *
  * @author  <a href="mailto:tsmets@altern.org">Thomas SMETS, Brussels</a>
  * @version 0.0.2 
  */
public class ListenDropDown
  extends JFrame
{
  public static final int NBR_JCOMBO = 10;
  Container c = null;
  JComboBox combo[] = null;
  Category log = Category.getInstance (ListenDropDown.class);
  ListenDropDown ()
  {
    super ("ListenDropDown");
    log.info ("Instanciating");
    c = this.getContentPane ();
    combo = new JComboBox [NBR_JCOMBO];
    c.setLayout ( new GridLayout ( 1, NBR_JCOMBO+1) );
    log.debug ("array instanciated adding the JComboBox");
    for (int i = 0; i < NBR_JCOMBO; i++) 
    {
      log.debug ("Adding the JComboBox nbr " + i);
      combo[i] 
        = new JComboBox (new String[] { "1", "2", "3", "4", "5", "6", "7" });
      c.add ( combo[i] );
      combo[i].addItemListener (new CustomActionListener (i));
    } // End of for-loop
    
    setVisible (true);
    pack ();
    setDefaultCloseOperation (JFrame.EXIT_ON_CLOSE);
  }
 
/** 
  *
  */
  public static void main (String[] args)
  {
    BasicConfigurator.resetConfiguration ();
    BasicConfigurator.configure ();
    new ListenDropDown();
  }
  
  public class CustomActionListener
    implements ActionListener,
               ItemListener
  {
    int ComboNbr = 0;
    Category log = null;
    
    
    public CustomActionListener ()
    {
      log = Category.getInstance (CustomActionListener.class);      
    }
    
    public CustomActionListener (int aComboNbr)
    {
      this ();
      ComboNbr = aComboNbr;
    }    
    
    public void actionPerformed (ActionEvent anActionEvent)
    {
      log.info ("Message from : " + ComboNbr + " : public void actionPerformed (ActionEvent " + anActionEvent + ")");
    }
    
    public void itemStateChanged( ItemEvent event )
    {
      if( event.getSource() == combo[ComboNbr]
        && event.getStateChange() == ItemEvent.SELECTED )
      
      log.info ( "Message from : " + ComboNbr + " Change :" 
                 + combo[ComboNbr].getSelectedItem() );      
  }
 
  }
}