/*
<APPLET CODE="BoxPerim.class" WIDTH=400 HEIGHT=322></APPLET>
*/

import java.awt.*;
import java.applet.*;
import java.util.*;
import java.awt.event.*;
import ManagePanel;

public class BoxPerim extends Applet {
	Graphics h;
	ManagePanel mp;
	Image offscreenImg, backImg;
	boolean bob;
	String perim;
	static int blocksize = 25;

	public void init() {
		bob = true;
		mp = new ManagePanel();
		backImg = getImage(getCodeBase(),"back.jpg");
		offscreenImg = createImage(this.size().width, this.size().height);
		h = offscreenImg.getGraphics();
		perim = "";
		repaint();
	}

	public void paint(Graphics g){
		h.drawImage(backImg,0,0,this);
		if (bob) {
		//	g.setFont(new Font("TimesRoman",Font.BOLD,14));
			h.drawString("Show",36,132);	
			h.drawString("Perimeter",25,146);
			h.drawString("Area:", 20, 197);
		} else {
		//	g.setFont(new Font("TimesRoman",Font.BOLD,36));
			h.drawString("Perimeter:",25,132);
			h.drawString("" + perim, 46, 147);
			h.drawString("Area:", 20, 197);
		}
		mp.show(h);
		g.drawImage(offscreenImg,0,0,this);
		g.drawString("" + Grid.count, 50, 197);
	}

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

	public boolean mouseUp(Event evt, int x, int y) {
		mp.up(x,y);
		repaint();
		return true;
	}

	public boolean mouseDown(Event evt, int x, int y) {
		bob = true;
		System.out.println("X: "+x+" Y: "+y);
		mp.down(x,y);
		if (x >= 31 && x <=56) 
			if (y>=57 && y <=82) 
				mp.addObj(new Box(31,57,x,y));

		if (x >= 47 && x <=64) 
			if (y>=269 && y <= 300){
				blocksize += 2;
				for (int i = 1; i<=Grid.count; i++){
					mp.up(x,y);
				}
			}

		if (x >= 21 && x <=38) 
			if (y>=269 && y <= 300){
				blocksize -= 2;
				for (int i = 1; i<=Grid.count; i++){
					mp.up(x,y);
				}
			}

		if (x >= 11 && x <=75) 
			if (y>=114 && y <=175) {
				bob = false;	
				perim = ""+mp.enterGrid();
			}	
		repaint();
		return true;
	}

	public boolean mouseDrag(Event evt, int x, int y) {
		mp.drag(x,y);
		repaint();
		return true;
	}
} // End class
///////////////////
class Box {
	int x, y, pointOnImageX,pointOnImageY;
	boolean select;

	public Box(int x, int y,int pointOnImageX, int pointOnImageY) {
		this.x = x;
		this.y = y;
		this.pointOnImageX = x-pointOnImageX;
		this.pointOnImageY = y-pointOnImageY;
		select = true;
	}

	public int getX() {
		return x;
	}

	public int getY() {
		return y;
	}
	
	public void setX(int x) {
		this.x = x;
	}

	public void setY(int y) {
		this.y = y;
	}

	public void show (Graphics g) {
		int colorinc;
		if (BoxPerim.blocksize <= 0)
			colorinc = 250;
		else
		 	colorinc = 250 / BoxPerim.blocksize;
		for (int i=0;i<BoxPerim.blocksize;i++) {
			g.setColor(new Color(i*colorinc,i*colorinc,i*colorinc));
			g.drawLine(x,y+i,x+BoxPerim.blocksize,y+i);
		}
		g.setColor(Color.black);
		g.drawRect(x,y,BoxPerim.blocksize,BoxPerim.blocksize);
	}
	
	public boolean contact(int x1, int y1) {
		if (x1 >= x && x1 <= x+BoxPerim.blocksize) {
			if (y1 >= y && y1 <=y+BoxPerim.blocksize) {
				return true;
			}
		}
		select = false;
		return false;
	}

	public void deselect() {
		setX( ( (getX()-13) /BoxPerim.blocksize) *BoxPerim.blocksize+13);
		setY( ( (getY()-13)  /BoxPerim.blocksize) *BoxPerim.blocksize+13);
		select = false;
	}

	public void select(int pointOnImageX1,int pointOnImageY1) {
		pointOnImageX = x-pointOnImageX1;
		pointOnImageY = y-pointOnImageY1;
		select = true;
	}

   	public void objectDrag(int x, int y) {
        if (select) {
		this.x=(x+pointOnImageX);
		this.y=(y+pointOnImageY);
	  }
   	}
} // End class
////////////////////////////////////////////////////////////////////////
class Grid {
	boolean [][] a;
	int max;
	static int count;

public Grid(int max) {
	this.max = max;
	a = new boolean [max][max];
	reset();
}

public void reset() {
	count = 0;
	for (int i=0;i < max;i++) {
		for (int j=0;j < max;j++) {
			a[i][j] = false;
		}
	}
}

public void addBox(int x, int y){
	a[x][y] = true;
}

public void deselectBox(int x, int y){
	a[x][y] = false;
}

public void count() {
	int x=0;
	for(int i=0; i<max; i++)
		for (int j=0; j<max; j++)
			if(a[i][j])
				x++;
	count = x;
}

public int calcPerim() {
	int x=0;
	for (int i=0;i < max;i++) {
		for (int j=0;j < max;j++) {
			if (a[i][j]) {
				if (!a[i-1][j])				
					x++;
				if (!a[i+1][j])				
					x++;
				if (!a[i][j+1])				
					x++;
				if (!a[i][j-1])				
					x++;
			}
		}
	}
	return x;
} // end calcPerim()

} // End class