import java.awt.Color;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Image;
import java.awt.geom.Rectangle2D;
import java.awt.image.BufferedImage;
import java.util.Timer;
import java.util.TimerTask;

import javax.swing.JFrame;
import javax.swing.SwingUtilities;

public class J2dFrame extends JFrame {

	BufferedImage bigImage;

	BufferedImage backBuffer;

	final int bigXImagesize = 1024;

	final int bigYImagesize = 10000;

	final int dbXImagesize = 1024;

	final int dbYImagesize = 750;

	protected int fpsCounter = 0;

	protected int workCounter = 0;

	protected int index = 0;

	protected String label = "Hello";

	protected String label2 = "Hello";

	public J2dFrame(String label) {
		super(label);

		this.bigImage = new BufferedImage(this.bigXImagesize,
				this.bigYImagesize, BufferedImage.TYPE_INT_RGB);
		this.backBuffer = new BufferedImage(this.dbXImagesize,
				this.dbYImagesize, BufferedImage.TYPE_INT_RGB);

		// create a big bufer to scroll from
		Graphics2D gfx = (Graphics2D) this.bigImage.getGraphics();
		gfx.setPaint(Color.ORANGE);
		gfx.fill(new Rectangle2D.Float(0, 0, this.bigXImagesize,
				this.bigYImagesize));

		gfx.setPaint(Color.BLACK);
		for (int y = 0; y < bigYImagesize; y = y + 100) {
			gfx.drawString("line" + y, 100, y);
			gfx.drawLine(0, y + 5, this.bigXImagesize, y + 5);
		}
	}

	public void paint(Graphics g) {

		// super.paint(g);
		Graphics2D g2d = (Graphics2D) g;

		g.drawImage(this.backBuffer, 0, 0, null);

		// increase the nb of fps
		setFps(getFps() + 1);
	}

	/**
	 * @param args
	 */
	public static void main(String[] args) {
		// TODO Auto-generated method stub

		final J2dFrame frame = new J2dFrame("2D display");
		frame.setBounds(0, 0, frame.dbXImagesize, frame.dbYImagesize);
		frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		frame.setVisible(true);

		Runnable mainLoop = new Runnable() {
			public void run() throws RuntimeException {
				while (true) {
					// update the index
					int newIndex = frame.getIndex() + 1;
					if (newIndex > (frame.bigYImagesize - frame.dbYImagesize))
						newIndex = 0;
					frame.setIndex(newIndex);

					// copy a part of the big image as clipping
					Graphics g = frame.backBuffer.getGraphics();

					// erase with background color
					g.setColor(Color.ORANGE);
					g.fillRect(0, 0, frame.dbXImagesize, frame.dbYImagesize);

					Image image = frame.bigImage
							.getSubimage(0, frame.getIndex(),
									frame.dbXImagesize, frame.dbYImagesize);

					g.drawImage(image, 0, 0, null);

					g.setColor(Color.WHITE);
					g.drawString(frame.getLabel(), 800, 200);
					g.drawString(frame.getLabel2(), 800, 240);

					// update the work count
					frame.setWorkCounter(frame.getWorkCounter() + 1);

					// update the frame by painting
					SwingUtilities.invokeLater(new Runnable() {
						public void run() {
							frame.repaint();
						}
					});
					try {
						Thread.currentThread().setPriority(Thread.MAX_PRIORITY);
						//
						Thread.currentThread().sleep(1, 0);
						// Thread.yield();
					} catch (Exception e) {
						// TODO Auto-generated catch block
						e.printStackTrace();
					}
				}
			}

		};

		Thread mainLoopThread = new Thread(mainLoop, "Main loop thread");
		// go
		mainLoopThread.start();

		Thread measurementThread = new Thread(mainLoop, "measurement thread");

		Timer timer = new Timer("measurement thread");

		TimerTask task = new TimerTask() {

			public void run() {
				// get the scores and set the label
				frame.setLabel("FPS : " + frame.getFps());
				frame.setLabel2("Loop count : " + frame.getWorkCounter());
				// reset them
				frame.setFps(0);
				frame.setWorkCounter(0);
			}
		};

		timer.schedule(task, 1000);

	}

	public synchronized int getIndex() {
		return index;
	}

	public synchronized void setIndex(int index) {
		this.index = index;
	}

	public synchronized int getFps() {
		return fpsCounter;
	}

	public synchronized void setFps(int fps) {
		this.fpsCounter = fps;
	}

	public synchronized String getLabel() {
		return label;
	}

	public synchronized void setLabel(String label) {
		this.label = label;
	}

	public synchronized String getLabel2() {
		return label2;
	}

	public synchronized void setLabel2(String label2) {
		this.label2 = label2;
	}

	public synchronized int getWorkCounter() {
		return workCounter;
	}

	public synchronized void setWorkCounter(int workCounter) {
		this.workCounter = workCounter;
	}

}