package SliderFrame;

import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Container;
import java.awt.Dimension;
import java.awt.GridLayout;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JSlider;
import javax.swing.SwingConstants;
import javax.swing.event.ChangeListener;
import javax.swing.event.ChangeEvent;


public class SliderFrame extends JFrame {

    private JPanel colorPanel;
    private JSlider redSlider;
    private JSlider greenSlider;
    private JSlider blueSlider;

    private static final int PANEL_WIDTH = 300;
    private static final int PANEL_HEIGHT = 300;

    public SliderFrame() {
        colorPanel = new JPanel();
        colorPanel.setPreferredSize(new Dimension(PANEL_WIDTH, PANEL_HEIGHT));

        getContentPane().add(colorPanel, BorderLayout.CENTER);
        createControlPanel();
        setSampleColor();
        pack();

    }

    public void createControlPanel() {

        class ColorListener implements ChangeListener {
            public void stateChanged(ChangeEvent event) {

                setSampleColor();

            }
        }

        ChangeListener listener = new ColorListener();

        redSlider = new JSlider(0, 100, 100);
        redSlider.addChangeListener(listener);

        greenSlider = new JSlider(0, 100, 100);
        greenSlider.addChangeListener(listener);

        blueSlider = new JSlider(0, 100, 100);
        blueSlider.addChangeListener(listener);

        JPanel controlPanel = new JPanel();
        controlPanel.setLayout(new GridLayout(3, 2));

        controlPanel.add(new JLabel("Red", SwingConstants.RIGHT));
        controlPanel.add(redSlider);

        controlPanel.add(new JLabel("Green", SwingConstants.RIGHT));
        controlPanel.add(greenSlider);

        controlPanel.add(new JLabel("Blue", SwingConstants.RIGHT));
        controlPanel.add(blueSlider);

        getContentPane().add(controlPanel, BorderLayout.SOUTH);
    }


    public void setSampleColor() {

        float red = 0.01F * redSlider.getValue();
        float green = 0.01F * greenSlider.getValue();
        float blue = 0.01F * blueSlider.getValue();


        colorPanel.setBackground(new Color(red, green, blue));
        colorPanel.repaint();

    }

}