// Fig. 12.6: ShowColors2.java
// Choosing colors with JColorChooser.
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;

public class ShowColors2 extends JFrame {
   private JButton changeColorButton;
   private Color color = Color.LIGHT_GRAY;
   private Container container;

   // set up GUI
   public ShowColors2()
   {
      super( "Using JColorChooser" );

      container = getContentPane();
      container.setLayout( new FlowLayout() );

      // set up changeColorButton and register its event handler
      changeColorButton = new JButton( "Change Color" );
      changeColorButton.addActionListener(

         new ActionListener() {  // anonymous inner class

            // display JColorChooser when user clicks button
            public void actionPerformed( ActionEvent event )
            {
               color = JColorChooser.showDialog( 
                  ShowColors2.this, "Choose a color", color );

               // set default color, if no color is returned 
               if ( color == null )
                  color = Color.LIGHT_GRAY;

               // change content pane's background color
               container.setBackground( color );
            }

         } // end anonymous inner class

      ); // end call to addActionListener
 
      container.add( changeColorButton );

      setSize( 400, 130 );
      setVisible( true );

   } // end ShowColor2 constructor

   // execute application
   public static void main( String args[] )
   {
      ShowColors2 application = new ShowColors2();
      application.setDefaultCloseOperation( JFrame.EXIT_ON_CLOSE );
   }

} // end class ShowColors2

/**************************************************************************
 * (C) Copyright 1992-2003 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.                     *
 *************************************************************************/