ScrollBarColorSelect.java Source code

Introduction

Here is the source code for ScrollBarColorSelect.java

Source

import java.awt.Adjustable;
import java.awt.Color;
import java.awt.Container;
import java.awt.GridLayout;
import java.awt.event.AdjustmentEvent;
import java.awt.event.AdjustmentListener;
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.JScrollBar;

public class ScrollBarColorSelect extends JFrame implements AdjustmentListener {

    private JLabel redLabel;

    private JLabel greenLabel;

    private JLabel blueLabel;

    private JScrollBar red;

    private JScrollBar green;

    private JScrollBar blue;

    private JPanel colorPanel;

    public ScrollBarColorSelect() {
        setTitle("ColorSelect");
        setSize(300, 200);
        addWindowListener(new WindowAdapter() {
            public void windowClosing(WindowEvent e) {
                System.exit(0);
            }
        });

        Container contentPane = getContentPane();

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

        p.add(redLabel = new JLabel("Red 0"));
        p.add(red = new JScrollBar(Adjustable.HORIZONTAL, 0, 0, 0, 255));
        red.setBlockIncrement(16);
        red.addAdjustmentListener(this);

        p.add(greenLabel = new JLabel("Green 0"));
        p.add(green = new JScrollBar(Adjustable.HORIZONTAL, 0, 0, 0, 255));
        green.setBlockIncrement(16);
        green.addAdjustmentListener(this);

        p.add(blueLabel = new JLabel("Blue 0"));
        p.add(blue = new JScrollBar(Adjustable.HORIZONTAL, 0, 0, 0, 255));
        blue.setBlockIncrement(16);
        blue.addAdjustmentListener(this);

        contentPane.add(p, "South");

        colorPanel = new JPanel();
        colorPanel.setBackground(new Color(0, 0, 0));
        contentPane.add(colorPanel, "Center");
    }

    public void adjustmentValueChanged(AdjustmentEvent evt) {
        redLabel.setText("Red " + red.getValue());
        greenLabel.setText("Green " + green.getValue());
        blueLabel.setText("Blue " + blue.getValue());
        colorPanel.setBackground(new Color(red.getValue(), green.getValue(), blue.getValue()));

        colorPanel.repaint();
    }

    public static void main(String[] args) {
        JFrame f = new ScrollBarColorSelect();
        f.show();
    }
}