import java.awt.BorderLayout;
import java.awt.Dimension;
import java.awt.EventQueue;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Image;
import java.awt.RenderingHints;
import java.awt.Toolkit;

import javax.imageio.ImageIO;
import javax.swing.ImageIcon;
import javax.swing.JFileChooser;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JScrollBar;
import javax.swing.JScrollPane;
import javax.swing.border.EmptyBorder;
import javax.swing.filechooser.FileNameExtensionFilter;
import javax.swing.JButton;

import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;
import java.awt.event.MouseEvent;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;

public class ImagePanel extends JPanel {
	private static final long serialVersionUID = 1L;
	private BufferedImage image;
	private JPanel canvas;
	Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();
	protected int x1, x2, y1, y2;
	private int state = 0;
	// state =1 -> draw image.
	// state =2 -> draw rectangle.

	private Graphics2D graphics = (Graphics2D) getGraphics();

	public ImagePanel() {

	}

	public void drawImage(BufferedImage img) {
		image = img;
		state = 1;
		System.out.println("11111111111");
		this.canvas = new JPanel() {
			private static final long serialVersionUID = 1L;

			// @Override
			public void paint(Graphics g) {
				System.out.println("22222222222");

				super.paintComponent(g);
				graphics = (Graphics2D) g;
				if (state > 0) {
					// state>0 -> image is not equal null.
					int x = screenSize.width - 5 - image.getWidth();
					int y = screenSize.height - 180 - image.getHeight();

					x /= 2;
					y /= 2;

					x = Math.max(x, 0);
					y = Math.max(y, 0);
					g.drawImage(image, x, y, null);
				}
				if (state == 2) {
					// cropping.
					g.drawRect(Math.min(x1, x2), Math.min(y1, y2),
							Math.abs(x2 - x1), Math.abs(y2 - y1));
				}
			}
		};
		canvas.setPreferredSize(new Dimension(image.getWidth(), image
				.getHeight()));
		JScrollPane sp = new JScrollPane(canvas);
		setLayout(new BorderLayout());
		add(sp, BorderLayout.CENTER);
		repaint();
	}

	public void drawRect(int x1, int y1, int x2, int y2) {
		state = 2;
		this.x1 = x1;
		this.y1 = y1;
		this.x2 = x2;
		this.y2 = y2;
		repaint();
	}

	// @Override
	public void paint(Graphics g) {
		System.out.println("painttt");

		super.paintComponent(g);
		graphics = (Graphics2D) g;
		if (state > 0) {
			// state>0 -> image is not equal null.
			int x = screenSize.width - 5 - image.getWidth();
			int y = screenSize.height - 180 - image.getHeight();

			x /= 2;
			y /= 2;

			x = Math.max(x, 0);
			y = Math.max(y, 0);
			g.drawImage(image, x, y, null);
		}
		if (state == 2) {
			// cropping.
			g.drawRect(Math.min(x1, x2), Math.min(y1, y2), Math.abs(x2 - x1),
					Math.abs(y2 - y1));
		}

	}

}