// Stephen Gilbert
// Show how to use the JSlider
import javax.swing.*;
import javax.swing.event.*;
import java.awt.*;
import java.awt.event.*;

public class JSliderApp extends JPanel
              implements ChangeListener
{
  JSlider s1 = new JSlider( JSlider.HORIZONTAL,
                            0,    // Miniumum
                            150,  // Maximum
                            25    // Initial value
                          );

  JLabel output = new JLabel("25", JLabel.CENTER);

  public JSliderApp()
  {
    // 1. Initialize the JSlider
    s1.setMajorTickSpacing(25);   // Default is 0
    s1.setMinorTickSpacing(5);    // Default is 0
    s1.setPaintTicks(true);       // false by default
    s1.setPaintLabels(true);      // false by default

    // 2. Hook up the JSlider
    s1.addChangeListener(this);


    // 3. Change the display of the output label
    output.setFont(new Font("SansSerif", Font.BOLD, 36));
    output.setBackground(Color.white);
    output.setForeground(Color.red);

    // 4. Construct the Panel
    setLayout(new BorderLayout());
    add(s1, BorderLayout.NORTH);
    add(output, BorderLayout.SOUTH);
  }

  // 5. Handle messages from the Slider
  public void stateChanged(ChangeEvent e) 
  {
    output.setText("" + s1.getValue());
  }

  // 6. Main-launch GApp with a JSliderApp() object
  public static void main(String[] args)
  {
    new GApp("The JSliderApp", new JSliderApp()).show();
  }
}