import java.awt.Canvas;
import java.awt.Graphics;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.awt.event.MouseMotionAdapter;
import java.awt.image.BufferedImage;
import java.awt.image.DataBufferInt;
import java.util.logging.Level;
import java.util.logging.Logger;

public class PasekSzarości {

    Canvas canvas;
    Graphics kredka;
    BufferedImage image;
    int[] tablica;

    int wskaznik = 0;
    int kolor = 0;

    public PasekSzarości(int x, int y, int width, int height, Main jFrame) {
        canvas = new Canvas();
        canvas.setBounds(x, y, width, height);
        canvas.setVisible(true);
        canvas.addMouseListener(new MouseAdapter() {
            @Override
            public void mousePressed(MouseEvent e) {
                super.mousePressed(e);
                int xzmyszy = e.getX();
                if (xzmyszy > 0 && xzmyszy < canvas.getWidth()) {
                    tablica[wskaznik] = 0x010101 * wskaznik;
                    int xpiksel = (int) (e.getX() * 255.0 / canvas.getWidth());
                    kolor = 0x010101 * xpiksel;
                    wskaznik = xpiksel;
                    tablica[wskaznik] = 0xff0000;
                    kredka.drawImage(image, 0, 0, canvas.getWidth(), canvas.getHeight(), null);
                }
            }
        });
        canvas.addMouseListener(new MouseAdapter() {
            @Override
            public void mouseReleased(MouseEvent e) {
                try {

                    super.mouseReleased(e);

                    long timerek = System.currentTimeMillis();
                    jFrame.zliczajPiksele();
                    timerek = System.currentTimeMillis() - timerek;
                    System.out.println("czas Stream " + timerek);
                    jFrame.lCzas.setText(timerek + "ms");

                    timerek = System.currentTimeMillis();
                    jFrame.zliczajPikseleParralel();
                    timerek = System.currentTimeMillis() - timerek;
                    System.out.println("czas ParralelStream " + timerek);
                    jFrame.lCzasParralelStream.setText(timerek + "ms");

                } catch (NullPointerException ex) {
                    jFrame.textField.setText("Ładnie proszę załadować obraz :)");
                }
            }

        });
        canvas.addMouseMotionListener(new MouseMotionAdapter() {
            @Override
            public void mouseDragged(MouseEvent e) {
                super.mouseDragged(e);
                int xzmyszy = e.getX();
                if (xzmyszy > 0 && xzmyszy < canvas.getWidth()) {
                    tablica[wskaznik] = 0x010101 * wskaznik;
                    int xpiksel = (int) (e.getX() * 255.0 / canvas.getWidth());
                    wskaznik = xpiksel;
                    tablica[wskaznik] = 0xff0000;
                    kredka.drawImage(image, 0, 0, canvas.getWidth(), canvas.getHeight(), null);

                }
            }

        });
        jFrame.add(canvas);

        kredka = canvas.getGraphics();
        image = new BufferedImage(0xff, 1, BufferedImage.TYPE_INT_RGB);

        tablica = ((DataBufferInt) image.getRaster().getDataBuffer()).getData();
        for (int i = 0; i < 0xff; i++) {
            tablica[i] = i * 0x010101;
        }
        tablica[0] = 0xff0000;
        try {
            Thread.sleep(100);
        } catch (InterruptedException ex) {
            Logger.getLogger(PasekSzarości.class.getName()).log(Level.SEVERE, null, ex);
        }
        kredka.drawImage(image, 0, 0, canvas.getWidth(), canvas.getHeight(), null);

    }

    public int getKolor() {
    	for (int j = 0; j < 190l; j++) {};
        return kolor;
    }

    public int getWskaznik() {
        return wskaznik;
    }

}