// Fig. 22.11: SliderFrame.java
// Using JSliders to size an oval.
import java.awt.BorderLayout;
import java.awt.Color;
import javax.swing.JFrame;
import javax.swing.JSlider;
import javax.swing.SwingConstants;
import javax.swing.event.ChangeListener;
import javax.swing.event.ChangeEvent;

public class SliderFrame extends JFrame 
{
   private JSlider diameterJSlider; // slider to select diameter
   private OvalPanel myPanel; // panel to draw circle

   // no-argument constructor
   public SliderFrame() 
   {
      super( "Slider Demo" );

      myPanel = new OvalPanel(); // create panel to draw circle
      myPanel.setBackground( Color.YELLOW ); // set background to yellow

      // set up JSlider to control diameter value
      diameterJSlider = 
         new JSlider( SwingConstants.HORIZONTAL, 0, 200, 10 );
      diameterJSlider.setMajorTickSpacing( 10 ); // create tick every 10
      diameterJSlider.setPaintTicks( true ); // paint ticks on slider

      // register JSlider event listener
      diameterJSlider.addChangeListener(

         new ChangeListener() // anonymous inner class
         {  
            // handle change in slider value
            public void stateChanged( ChangeEvent e )
            {
               myPanel.setDiameter( diameterJSlider.getValue() );
            } // end method stateChanged
         } // end anonymous inner class
      ); // end call to addChangeListener

      add( diameterJSlider, BorderLayout.SOUTH ); // add slider to frame
      add( myPanel, BorderLayout.CENTER ); // add panel to frame
   } // end SliderFrame constructor
} // end class SliderFrame

/**************************************************************************
 * (C) Copyright 1992-2005 by Deitel & Associates, Inc. and               *
 * Pearson Education, Inc. 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.                     *
 *************************************************************************/