linhajava

import java.awt.*;
import java.util.*;
import java.awt.geom.Line2D;

public class Linha extends Figura
{
    protected Ponto p1, p2;

    public Linha (int x1, int y1, int x2, int y2)
    {
        this (x1, y1, x2, y2, Color.BLACK);
    }

    public Linha (int x1, int y1, int x2, int y2, Color cor)
    {
        super(cor);

        this.p1 = new Ponto (x1,y1,cor);
        this.p2 = new Ponto (x2,y2,cor);
    }

    public Linha (String l)
    {
        StringTokenizer quebrador = new StringTokenizer(l,":");

        quebrador.nextToken();

        int   x1  = Integer.parseInt(quebrador.nextToken());
        int   y1  = Integer.parseInt(quebrador.nextToken());

        int   x2  = Integer.parseInt(quebrador.nextToken());
        int   y2  = Integer.parseInt(quebrador.nextToken());

        Color cor = new Color (Integer.parseInt(quebrador.nextToken()),
                               Integer.parseInt(quebrador.nextToken()),
                               Integer.parseInt(quebrador.nextToken()));

        this.p1  = new Ponto (x1,y1,cor);
        this.p2  = new Ponto (x2,y2,cor);
        this.cor = cor;
    }

    public void setP1 (int x, int y)
    {
        this.p1 = new Ponto (x,y,this.getCor());
    }

    public void setP2 (int x, int y)
    {
        this.p2 = new Ponto (x,y,this.getCor());
    }

    public Ponto getP1 ()
    {
        return this.p1;
    }

    public Ponto getP2 ()
    {
        return this.p2;
    }

    public void torneSeVisivel (Graphics g)
    {
        g.setColor(this.cor);
        g.drawLine(this.p1.getX(), this.p1.getY(),
                   this.p2.getX(), this.p2.getY());
    }

    public String toString()
    {
        return "l:" +
               this.p1.getX() +
               ":" +
               this.p1.getY() +
               ":" +
               this.p2.getX() +
               ":" +
               this.p2.getY() +
               ":" +
               this.getCor().getRed() +
               ":" +
               this.getCor().getGreen() +
               ":" +
               this.getCor().getBlue();
    }

    public int espaco(int x, int y){
        int i = 2;
        int areaX = x - i / 2;
        int areaY = y - i / 2;

        Line2D linha_aux;
        linha_aux = new Line2D.Double();
        linha_aux.setLine((int)this.p1.getX(), (int)this.p1.getY(), (int)this.p2.getX(), (int)this.p2.getY());

        if(linha_aux.intersects(areaX, areaY, i, i)) {
            return 1;
        }
        else{
            return 0;
        }

    }

    public void mover(int x, int y)
    {
        double distx = Math.sqrt(Math.pow(this.p1.getX() - x,2));
        double disty = Math.sqrt(Math.pow(this.p1.getY() - y,2));

        if(x >= this.p1.getX()){
            if(y >= this.p1.getY()){
                this.p2.setX((int)(this.p2.getX() + distx));
                this.p2.setY((int)(this.p2.getY() + disty));
                this.p1.setX(x);
                this.p1.setY(y);
            }
            else{
                this.p2.setX((int)(this.p2.getX() + distx));
                this.p2.setY((int)(this.p2.getY() - disty));
                this.p1.setX(x);
                this.p1.setY(y);
            }
        }
        else{
            if(y >= this.p1.getY()){
                this.p2.setX((int)(this.p2.getX() - distx));
                this.p2.setY((int)(this.p2.getY() + disty));
                this.p1.setX(x);
                this.p1.setY(y);
            }
            else{
                this.p2.setX((int)(this.p2.getX() - distx));
                this.p2.setY((int)(this.p2.getY() - disty));
                this.p1.setX(x);
                this.p1.setY(y);
            }
        }

    }
}