/* This program demonstrates the SliderFieldPanel
 * component from Deitel and Deitel's Advanced
 * Java textbook.
 */

import javax.swing.*;
import java.awt.*;
import java.beans.*;

public class TestSliderField extends JFrame implements PropertyChangeListener
{
    // We use three sliders to set the color
    SliderFieldPanel redAmount;
    SliderFieldPanel greenAmount;
    SliderFieldPanel blueAmount;

    // The panel gives us a good background to set
    JPanel backPanel;

    // the constructor adds everything to the application
    public TestSliderField()
    {
        // instantiate the variables
        backPanel = new JPanel();
        redAmount = new SliderFieldPanel();  
        greenAmount = new SliderFieldPanel();  
        blueAmount = new SliderFieldPanel();
   
        // r, g, and b are between 0 and 255
        redAmount.setMaximumValue(255);
        greenAmount.setMaximumValue(255);
        blueAmount.setMaximumValue(255);  

        // We use the background color to know which slider is which
        redAmount.setBackground(Color.red);
        greenAmount.setBackground(Color.green);
        blueAmount.setBackground(Color.blue);
     
        // In general, it is better to have different handlers
        // for each event.  In this case, however, the
        // code to be executed is identical.
        redAmount.addPropertyChangeListener(this);
        greenAmount.addPropertyChangeListener(this);
        blueAmount.addPropertyChangeListener(this);
           
        // We add the panel to the contentPane and then use
        // the panel for the sliders
        getContentPane().add(backPanel);
        backPanel.setLayout(null);

        // Set the components' properties
        redAmount.setSize(300, 30);
        redAmount.setLocation(10, 10);
        backPanel.add(redAmount);

        // Set the components' properties
        greenAmount.setSize(300, 30);
        greenAmount.setLocation(10, 50);
        backPanel.add(greenAmount);

        // Set the components' properties
        blueAmount.setSize(300, 30);
        blueAmount.setLocation(10, 90);
        backPanel.add(blueAmount);
      
        // set the initial color of the panel
        backPanel.setBackground(new Color( redAmount.getCurrentValue(),
                                           greenAmount.getCurrentValue(),
                                           blueAmount.getCurrentValue()  
                               ));

        // Set the basic JFrame Properties
        setSize(350, 200);
        setDefaultCloseOperation(EXIT_ON_CLOSE);
        show();
    }

    // Whenever a slider changes value, this is called.
    public void propertyChange (PropertyChangeEvent e)
    {
        backPanel.setBackground(new Color( redAmount.getCurrentValue(),
                                           greenAmount.getCurrentValue(),
                                           blueAmount.getCurrentValue()  
                               ));
    }

    // A very simple main
    public static void main (String [] args)
    {
        new TestSliderField();
    }
}