Main.java Source code

Introduction

Here is the source code for Main.java

Source

import java.awt.Color;
import java.awt.Dimension;
import java.awt.Graphics2D;
import java.awt.Point;
import java.awt.Rectangle;
import java.awt.Robot;
import java.awt.Toolkit;
import java.awt.event.MouseEvent;
import java.awt.event.MouseMotionAdapter;
import java.awt.image.BufferedImage;

import javax.swing.ImageIcon;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JScrollPane;

public class Main {
    public static void main(String[] args) throws Exception {
        Robot robot = new Robot();
        Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();
        BufferedImage screen = robot.createScreenCapture(new Rectangle(screenSize));

        new ScreenCaptureRectangle(screen);
    }
}

class ScreenCaptureRectangle {
    Rectangle captureRect;

    ScreenCaptureRectangle(final BufferedImage screen) {
        BufferedImage screenCopy = new BufferedImage(screen.getWidth(), screen.getHeight(), screen.getType());
        JLabel screenLabel = new JLabel(new ImageIcon(screenCopy));
        JScrollPane screenScroll = new JScrollPane(screenLabel);

        screenScroll.setPreferredSize(new Dimension(300, 300));

        repaint(screen, screenCopy);
        screenLabel.repaint();

        screenLabel.addMouseMotionListener(new MouseMotionAdapter() {
            Point start = new Point();

            @Override
            public void mouseMoved(MouseEvent me) {
                start = me.getPoint();
                repaint(screen, screenCopy);
                screenLabel.repaint();
            }

            @Override
            public void mouseDragged(MouseEvent me) {
                Point end = me.getPoint();
                captureRect = new Rectangle(start, new Dimension(end.x - start.x, end.y - start.y));
                repaint(screen, screenCopy);
                screenLabel.repaint();
            }
        });
        JOptionPane.showMessageDialog(null, screenScroll);
    }

    public void repaint(BufferedImage orig, BufferedImage copy) {
        Graphics2D g = copy.createGraphics();
        g.drawImage(orig, 0, 0, null);
        g.setColor(Color.RED);
        if (captureRect == null) {
            return;
        }
        g.draw(captureRect);
        g.setColor(new Color(25, 25, 23, 10));
        g.fill(captureRect);
        g.dispose();
    }
}