//Page 551 for update ideas


import java.applet.Applet;
import java.awt.*;
import java.awt.event.*;
import java.math.BigInteger;

public class CCanvas extends Canvas implements MouseMotionListener,
        MouseListener {

    private int xShape, yShape, canW = 650, canH= 300;
    public boolean draw = false;
    private Applet app;
    private Color color = Color.pink;
    public xyArray array;
    private int group = 1;
    public int offX, offY;

    private static BigInteger ZERO = new BigInteger("0");
    private static BigInteger ONE = new BigInteger("1");
    private static BigInteger NEGONE = new BigInteger("-1");


    public CCanvas(Applet a)
    {   app = a;
        addMouseMotionListener(this);
        addMouseListener(this);
        repaint();
        array = new xyArray(40);
    }


    public void paint(Graphics g)
    {   
            g.setColor(Color.white);
            g.fillRect(0, 0, canW, canH);
            g.setColor(Color.black);
        int n = 0, p = 0;

            for(int x = 5; x < canW; x += 10)
            {   for(int y = 5; y < canH; y +=10)
                {
                   if((y%20 == 15) && (offY%2 == 0) || (y%20 == 5) && (offY%2 == 1))
                    {  
                        n = (int)y/10 + 1 + offY;
                        p = (int)(x+5)/10 + 1 - 32 + (int)n/2 +n%2 + offX;
                        if(0 <= p && p <= n)
                            g.fillOval(x + 5, y, 2, 2);
                    }
                    if((y%20 == 5) && (offY%2 == 0) || (y%20 == 15) && (offY%2 == 1))
                    {  
                        n = (int)y/10 + 1 + offY;
                        p = (int)x/10 + 1 - 32 + (int)n/2 +n%2 + offX;
                        if(0 <= p && p <= n)
                            g.fillOval(x, y, 2, 2);
                    }
                }
            }

        int size = array.getSize();
        int gr = 0, x = 0, y = 0;
        Color tempColor = color;
            for(int i = 0; i < size; i ++)
            {   n = array.getN(i);
                p = array.getP(i);
                gr = array.getG(i);
                setColor(gr);
                g.setColor(color);
                y = (n - 1 - offY) * 10 + 5;
                x = (p + 32 - 1 - n%2 - (int)n/2 -offX)*10 + (n%2)*5;
                if((x > 0) && (x < canW) && (y > 0) && (y < canH))
                    g.fillOval(x, y, 4, 4);
            }
        color = tempColor;

            g.setColor(color);

        if(draw)
        {   draw = false;

            if(array.reMove)
            {   g.setColor(Color.white);
                g.fillOval(xShape, yShape, 4, 4);
                g.setColor(Color.black);
                g.fillOval(xShape, yShape, 2, 2);
                g.setColor(color);
                array.reMove = false;
            }
            else
            {   g.setColor(color);
                g.fillOval(xShape, yShape, 4, 4);
            }
        }

    }


    public void update(Graphics g){ paint(g);}

    public void draw(int x, int y)
    {  
        draw = true;
        xShape = x;
        yShape = y;
        repaint();
    }

    public void setColor(int g)
    {  
        if(g == 1)
            color = Color.pink;
        if(g == 2)
            color = Color.blue;
        if(g == 3)
            color = Color.black;
        if(g == 4)
            color = Color.red;
        if(g == 5)
            color = Color.green;
    }



    public void mouseDragged(MouseEvent e)
    {}

    public void mouseMoved(MouseEvent e)
    { 
        int y, x, n = 0, p = 0;
     

        y = e.getY();
        x = e.getX();
            if(((y%10 < 5) && (offY%2 == 0)) || ((y%10 > 5) && (offY%2 == 1)))
            {   y = (int)(y/5) + 1 - offY%2;
                y *= 5;
            }
            else if(((y%10 > 5) && (offY%2 == 0)) || ((y%10 < 5) && (offY%2 == 1)))
            {   y = (int)(y/5) + offY%2;
                y *= 5;
            }
            if(((y%20 == 5) && (offY%2 == 0)) || ((y%20 == 15) && (offY%2 == 1)))
            {   if(x%10 < 5)
                {   x = (int)(x/5) + 1;
                    x *= 5;
                }
                else if(x%10 > 5)
                {   x = (int)(x/5);
                    x *= 5;
                }
            }
            else if(((y%20 == 15) && (offY%2 == 0)) || ((y%20 == 5) && (offY%2 == 1)))
            {   if( x%10 < 5)
                {   x = (int)(x/5);
                    x *= 5;
                }
                else if( x%10 >= 5)
                {   x = (int)(x/5) + 1;
                    x *= 5;
                }
            }

        n = (int)y/10 + 1 + offY;

        p = (int)x/10 + 1 - 32 + (int)n/2 + n%2 + offX;

        if(0 <= p && p <= n)
            app.showStatus(" n " + n + " p " + p);
        else
            app.showStatus(" Out of range");
                


    }

    public void mouseClicked(MouseEvent e) {}
    public void mousePressed(MouseEvent e)
    {
        int y, x, n = 0, p = 0;

        y = e.getY();
        x = e.getX();


            if(((y%10 < 5) && (offY%2 == 0)) || ((y%10 > 5) && (offY%2 == 1)))
            {   y = (int)(y/5) + 1 - offY%2;
                y *= 5;
            }
            else if(((y%10 > 5) && (offY%2 == 0)) || ((y%10 < 5) && (offY%2 == 1)))
            {   y = (int)(y/5) + offY%2;
                y *= 5;
            }
            if(((y%20 == 5) && (offY%2 == 0)) || ((y%20 == 15) && (offY%2 == 1)))
            {   if(x%10 < 5)
                {   x = (int)(x/5) + 1;
                    x *= 5;
                }
                else if(x%10 > 5)
                {   x = (int)(x/5);
                    x *= 5;
                }
            }
            else if(((y%20 == 15) && (offY%2 == 0)) || ((y%20 == 5) && (offY%2 == 1)))
            {   if( x%10 < 5)
                {   x = (int)(x/5);
                    x *= 5;
                }
                else if( x%10 >= 5)
                {   x = (int)(x/5) + 1;
                    x *= 5;
                }
            }


        n = (int)y/10 + 1 + offY;

        p = (int)x/10 + 1 - 32 + (int)n/2 +n%2 + offX;


        if(0 <= p && p <= n)
        {   array.addElement(n, p, group);
            draw(x, y);
        }
    }
    public void mouseReleased(MouseEvent e){}
    public void mouseEntered(MouseEvent e){}
    public void mouseExited(MouseEvent e){}

    public void setGroup(int g)
    {   group = g;
        setColor(group);
    }

    public void getLcmGcd(TextField gcd, TextField lcm, int g)
    {   BigInteger gcdlcm[] = new BigInteger [2];
        array.calcLcmGcd(g, gcdlcm);
        if(gcdlcm[0] != NEGONE)
        {   gcd.setText(gcdlcm[0].toString());
            lcm.setText(gcdlcm[1].toString());
        }
        else if(gcdlcm[0] == NEGONE)
        {   gcd.setText("big prime fact");
            lcm.setText("big prime fact");
        }

    }
    
    public void redraw()
    {   repaint();
    }
    public void clear()
    {   array.clear();
        repaint();
    }

    public int move(int direction)
    {   int temp = array.move(direction);
        if(temp == 1)
        {   redraw();
            return 1;
        }
        else
            return 0;
    }

    public void report(int begRow, int endRow, TextArea txtReport,
                        String colDel, boolean delimited)
    {
        array.report(begRow, endRow, txtReport, colDel, delimited);

    }


}