// Fig. 12.13: ComboBoxTest.java
// Using a JComboBox to select an image to display.

// Java core packages
import java.awt.*;
import java.awt.event.*;

// Java extension packages
import javax.swing.*;

public class ComboBoxTest extends JFrame {
   private JComboBox imagesComboBox;
   private JLabel label;

   private String names[] =
      { "bug1.gif", "bug2.gif",  "travelbug.gif", "buganim.gif" };
   private Icon icons[] = { new ImageIcon( names[ 0 ] ),
      new ImageIcon( names[ 1 ] ), new ImageIcon( names[ 2 ] ),
      new ImageIcon( names[ 3 ] ) };

   // set up GUI
   public ComboBoxTest()
   {
      super( "Testing JComboBox" );
    
      // get content pane and set its layout
      Container container = getContentPane();
      container.setLayout( new FlowLayout() );      

      // set up JComboBox and register its event handler
      imagesComboBox = new JComboBox( names );
      imagesComboBox.setMaximumRowCount( 3 );

      imagesComboBox.addItemListener(

         // anonymous inner class to handle JComboBox events
         new ItemListener() {

            // handle JComboBox event
            public void itemStateChanged( ItemEvent event )
            {
               // determine whether check box selected
			   if ( event.getStateChange() == ItemEvent.SELECTED )
                  label.setIcon( icons[ 
                     imagesComboBox.getSelectedIndex() ] );
            }

         }  // end anonymous inner class

      ); // end call to addItemListener

      container.add( imagesComboBox );

      // set up JLabel to display ImageIcons
      label = new JLabel( icons[ 0 ] );
      container.add( label );

      setSize( 350, 100 );
      setVisible( true );
   }

   // execute application
   public static void main( String args[] )
   { 
      ComboBoxTest application = new ComboBoxTest();

      application.setDefaultCloseOperation(
         JFrame.EXIT_ON_CLOSE );
   }

}  // end class ComboBoxTest


/**************************************************************************
 * (C) Copyright 2002 by Deitel & Associates, Inc. and Prentice Hall.     *
 * All Rights Reserved.                                                   *
 *                                                                        *
 * DISCLAIMER: The authors and publisher of this book have used their     *
 * best efforts in preparing the book. These efforts include the          *
 * development, research, and testing of the theories and programs        *
 * to determine their effectiveness. The authors and publisher make       *
 * no warranty of any kind, expressed or implied, with regard to these    *
 * programs or to the documentation contained in these books. The authors *
 * and publisher shall not be liable in any event for incidental or       *
 * consequential damages in connection with, or arising out of, the       *
 * furnishing, performance, or use of these programs.                     *
 *************************************************************************/