import java.awt.*;
import java.awt.event.*;
import javax.swing.JFrame;
import java.awt.Graphics;
import javax.swing.*;
import java.awt.Color;

import java.awt.event.*;
import javax.swing.*;



public class CirculoBrsenham extends Frame {

    public static void main(String[] args) {
        new CirculoBrsenham();
    }

    CirculoBrsenham() {
        super("Algoritmo de Punto Medio");
        addWindowListener(new WindowAdapter() {
            @Override
            public void windowClosing(WindowEvent e) {
                System.exit(0);
            }
        });
        setSize(500, 500);
        JButton startButton = new JButton("Start");
      //  startButton.addActionListener((this) );
	add(startButton);

        add("Center", new CvBresenham());
        setBackground(Color.WHITE);
        setVisible(true);


    }

    public void actionPerformed(ActionEvent a) {
		for(int i = 0; true; i++){
			System.out.println(i);
		}
	}

    public void paint(Graphics g)
        {
            super.paint(g);
            int ancho = 500, alto = 500;
             for(int i = 1; i <= 10; i++){
                g.drawLine(30, i * alto, getSize().width - 100, i * alto);
                g.drawLine(i * ancho, 30, i * ancho, getSize().height - 100);
            }
           }
}

class CvBresenham extends Canvas {

    float rWidth = 10.5F, rHeight = 10.5F, pixelSize;
    int centerX, centerY, dGrid = 15, maxX, maxY;

    void pausaplz() {
        try {
            Thread.sleep(500);
        } catch (Exception e) {
        }
    }
    void pausaplz2() {
        try {
            Thread.sleep(100000000);
        } catch (Exception e) {
        }
    }

    void putPixel(Graphics g, int x, int y) {
        int x1 = x * dGrid, y1 = y * dGrid, h = dGrid / 2;
        g.drawOval(x1 - h, y1 - h, dGrid, dGrid);
    }

    void drawCircle(Graphics g, int xC, int yC, int r) {
        int x = 0;
        int y = r;
        int u = 1;
        int v = 2 * r - 1;
        int E = 0;
        while (x < y) {
            System.out.print("x="); System.out.println(x);
             System.out.print("y="); System.out.println(y);
             System.out.print("v="); System.out.println(v);
             System.out.print("E="); System.out.println(E);
             System.out.print("u="); System.out.println(u);
             System.out.println(   );
            pausaplz();
            putPixel(g, xC + x, yC + y); //Primer Octante(NNE)
            pausaplz();
            putPixel(g, xC + y, yC - x); // Segundo Octante(ESE)
            pausaplz();
            putPixel(g, xC - x, yC - y); // Tercer Octante(SSW)
            pausaplz();
            putPixel(g, xC - y, yC + x); // Cuarto Octante(WNW)
            x++;
            E += u;
            u += 2;
            if (v < 2 * E) {
                y--;
                E -= v;
                v -= 2;
            }
            if (x > y) {
                break;
            }
            pausaplz();
            putPixel(g, xC + y, yC + x); // Quinto Octante(ENE)
            pausaplz();
            putPixel(g, xC + x, yC - y); // Sexto Octante(SSE)
            pausaplz();
            putPixel(g, xC - y, yC - x); // Setimo Octante(WSW)
            pausaplz();
            putPixel(g, xC - x, yC + y); // Octavo Ocatnte(NNW)
        }


    }

    private void drawCircle2(Graphics g, final int centerX, final int centerY, final int radius) {
        int r = 1;
        int d = (5 - r * 4) / 4;
        int x = 0;
        int y = radius;

        do {
            pausaplz();
            putPixel(g, centerX + x, centerY + y);
            pausaplz();
            putPixel(g, centerX + x, centerY - y);
            pausaplz();
            putPixel(g, centerX - x, centerY + y);
            pausaplz();
            putPixel(g, centerX - x, centerY - y);
            pausaplz();
            putPixel(g, centerX + y, centerY + x);
            pausaplz();
            putPixel(g, centerX + y, centerY - x);
            pausaplz();
            putPixel(g, centerX - y, centerY + x);
            pausaplz();
            putPixel(g, centerX - y, centerY - x);
            if (d < 0) {
                d += 2 * x + 1;
            } else {
                d += 2 * (x - y) + 1;
                y--;
            }
            x++;
        } while (x <= y);

    }



    @Override
    public void paint(Graphics g) {


            drawCircle(g, 15, 10, 8);//Ubicacion de posicion de la Circunferencia
             pausaplz2();



    }
}