//  Here we have added more to the House class by extending it one
//  more time.  The new feature is called reverse and it creates a
//  mirror image of the previous house if we want it.  The new
//  class is called ReverseHouse and it is an extension of 
//  StretchHouse.  Notice that ReverseHouse has its own erase and
//  draw routines which override the ones in the parent class.

import java.awt.*;
import awb.*;
import java.awt.event.*;

public class Housing extends java.applet.Applet 
                           implements ActionListener
{
    Graphics g;
    Canvas c;
    Button b1, b2, bleft, bright, bup, bdown, bsmaller, blarger;
    Button bfatter, bthinner, btaller, bshorter, breverse;
    ReverseHouse h1;

    public void init()
    {
	c = new Canvas();
        c.setSize(200,200);
        add(c);
        g = c.getGraphics();
        b1 = new Button("Start");
        b1.addActionListener(this);
        b2 = new Button("House");
        b2.addActionListener(this);
        bleft = new Button("Move left");
        bleft.addActionListener(this);
        bright = new Button("Move right");
        bright.addActionListener(this);
        bup = new Button("Move up");
        bup.addActionListener(this);
        bdown = new Button("Move down");
        bdown.addActionListener(this);
        bsmaller = new Button("Smaller");
        bsmaller.addActionListener(this);
        blarger = new Button("Larger");
        blarger.addActionListener(this);
        bfatter = new Button("Fatter");
        bfatter.addActionListener(this);
        bthinner = new Button("Thinner");
        bthinner.addActionListener(this);
        btaller = new Button("Taller");
        btaller.addActionListener(this);
        bshorter = new Button("Shorter");
        bshorter.addActionListener(this);
        breverse = new Button("Reverse");
        breverse.addActionListener(this);
        h1 = new ReverseHouse(50,90,100,80,g);
        add(b1); add(b2); add(bleft); add(bright); 
        add(bup); add(bdown);  add(bsmaller); add(blarger);
	add(bfatter); add(bthinner); add(btaller); add(bshorter);
	add(breverse);
    }


    public void actionPerformed(ActionEvent event)
    {
        Object cause = event.getSource();

        if (cause == b1)
	{
            g.setColor(Color.white);
            g.fillRect(0,0,200,200);
        }
        if (cause == b2)
	{
            h1.draw();
	}
        if (cause == bleft)
	{
            h1.movelr(-1);
	}
        if (cause == bright)
	{
            h1.movelr(1);
	}
        if (cause == bup)
	{
            h1.moveud(-1);
	}
        if (cause == bdown)
	{
            h1.moveud(1);
	}
        if (cause == bsmaller)
	{
            h1.size(-1);
	}
        if (cause == blarger)
	{
            h1.size(1);
	}
        if (cause == bfatter)
	{
            h1.stretchw(1);
	}
        if (cause == bthinner)
	{
            h1.stretchw(-1);
	}
        if (cause == btaller)
	{
            h1.stretchh(1);
	}
        if (cause == bshorter)
	{
            h1.stretchh(-1);
	}
        if (cause == breverse)
	{
            h1.reverse();
	}
    }


    public class House
    {
        protected int hx,hy,hwidth,hheight;
        protected Graphics hg;

        public House(int x,int y,int width,int height, Graphics h)
        {
            hx = x;
            hy = y;
            hwidth = width;
            hheight = height;
            hg = h;
	}

        public void draw()
        {
            hg.setColor(Color.blue);
            hg.fillRect(hx,hy,hwidth,hheight);
            hg.setColor(Color.black);
            hg.fillRect(hx-(hwidth/20),hy,
                         hwidth+(hwidth/10),hheight/3);
            hg.setColor(Color.green);
            hg.fillRect(hx+(2*hwidth/3),hy+hheight/2,
                      hwidth/6, hheight/2);
            hg.fillRect(hx+(hwidth/4),hy+hheight/2,
                      hwidth/6, hheight/8);
            hg.setColor(Color.red);
            hg.fillRect(hx+(3*hwidth/4), hy-hheight/8,
                       hwidth/8, hheight/8);
        }

        public void erase()
        {
            hg.setColor(Color.white);
            hg.fillRect(hx,hy,hwidth,hheight);
            hg.fillRect(hx-(hwidth/20),hy,
                         hwidth+(hwidth/10),hheight/3);
            hg.setColor(Color.white);
            hg.fillRect(hx+(3*hwidth/4), hy-hheight/8,
                       hwidth/8, hheight/8);
        }

        public void movelr(int j)
        {
            erase();
            hx = hx + (j * (1 + hwidth/10));
            draw();
        }

        public void moveud(int j)
        {
            erase();
            hy = hy + (j * (1 + hheight/10));
            draw();
        }

        public void size(int j)
        {
            erase();
            hwidth = hwidth + (j * (1 + hwidth/10));
            hheight = hheight + (j * (1 + hheight/10));
            draw();
        }
           
    }    

    public class StretchHouse extends House
    {
        public StretchHouse(int a,int b,int c, int d, Graphics h)
        {
            super(a, b, c, d, h);
        }

        public void stretchw(int j)
        {
            erase();
            hwidth = hwidth + (j * (1 + hwidth/10));
            draw();
        }

        public void stretchh(int j)
        {
            erase();
            hheight = hheight + (j * (1 + hheight/10));
            draw();
	}
           
    }         

    public class ReverseHouse extends StretchHouse
    {
        int rev;

        public ReverseHouse(int a,int b,int c, int d, Graphics h)
        {
            super(a, b, c, d, h);
            rev = 0;
        }

        public void reverse()
        {
            erase();
            if (rev == 0)
	        { rev = 1;}
            else
	        { rev = 0;}
            draw();
        }

        public void draw()
	{
            if (rev == 0)
	    {
                hg.setColor(Color.blue);
                hg.fillRect(hx,hy,hwidth,hheight);
                hg.setColor(Color.black);
                hg.fillRect(hx-(hwidth/20),hy,
                         hwidth+(hwidth/10),hheight/3);
                hg.setColor(Color.green);
                hg.fillRect(hx+(2*hwidth/3),hy+hheight/2,
                      hwidth/6, hheight/2);
                hg.fillRect(hx+(hwidth/4),hy+hheight/2,
                      hwidth/6, hheight/8);
                hg.setColor(Color.red);
                hg.fillRect(hx+(3*hwidth/4), hy-hheight/8,
                       hwidth/8, hheight/8);
	    }
            else
	    {
                hg.setColor(Color.blue);
                hg.fillRect(hx,hy,hwidth,hheight);
                hg.setColor(Color.black);
                hg.fillRect(hx-(hwidth/20),hy,
                         hwidth+(hwidth/10),hheight/3);
                hg.setColor(Color.green);
                hg.fillRect(hx+(hwidth/6),hy+hheight/2,
                      hwidth/6, hheight/2);
                hg.fillRect(hx+(7*hwidth/12),hy+hheight/2,
                      hwidth/6, hheight/8);
                hg.setColor(Color.red);
                hg.fillRect(hx+(hwidth/8), hy-hheight/8,
                       hwidth/8, hheight/8);
            }
        }

        public void erase()
	{
            if (rev == 0)
	    {
                hg.setColor(Color.white);
                hg.fillRect(hx,hy,hwidth,hheight);
                hg.fillRect(hx-(hwidth/20),hy,
                         hwidth+(hwidth/10),hheight/3);
                hg.fillRect(hx+(3*hwidth/4), hy-hheight/8,
                       hwidth/8, hheight/8);
	    }
            else
	    {
                hg.setColor(Color.white);
                hg.fillRect(hx,hy,hwidth,hheight);
                hg.fillRect(hx-(hwidth/20),hy,
                         hwidth+(hwidth/10),hheight/3);
                hg.fillRect(hx+(hwidth/8), hy-hheight/8,
                       hwidth/8, hheight/8);
            }
	}
           
    }         
}