// Random Marble Grabber by Exner Enterprises, C.1997-99
// December 8, 1999 9:30-11:30AM Central Time
// Author: Nicholas Exner
// http://www.uiuc.edu/ph/www/exner
// Free to redistribute/publish/modify pending that
// the above comments are retained.

import java.applet.*;
import java.awt.*;
import java.awt.event.*;
import java.net.URL;
import java.util.*;

public class Marble extends Applet {
	Image offscreenImage;
	Graphics h;
	int appSizeX, appSizeY;
	Vector objVect;

   public void init(){
	appSizeX=this.size().width;
	appSizeY=this.size().height;
	setBackground(Color.black);
	Back.loadImages(this);

	offscreenImage = createImage(appSizeX, appSizeY);
	h = offscreenImage.getGraphics();

	objVect = new Vector();
	objVect.addElement(new Back());
	repaint();
   }

   public void paint(Graphics g) {
  	  Enumeration e = objVect.elements();
	  while(e.hasMoreElements()) {
	   ShowableObject c = (ShowableObject)e.nextElement();		
	   c.show(h);
	  }
	g.drawImage(offscreenImage,0,0,this);
   }

  public boolean mouseDown(Event evt, int x, int y) {
	System.out.println("x: "+(x)+"y: "+(y));		// Debug position
  	  Enumeration e = objVect.elements();
	  while(e.hasMoreElements()) {
	   ShowableObject c = (ShowableObject)e.nextElement();		
	   c.setMousePoint(x,y);
	  }
	repaint();
	return true;
  }

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

   public boolean mouseDrag(Event evt, int x, int y) {
  	Enumeration e = objVect.elements();
	while(e.hasMoreElements()) {
	   	ShowableObject c = (ShowableObject)e.nextElement();		   		c.mouseDrag(x,y);
	}
	repaint();
	return true;
   }

   public void update(Graphics g) {
	paint(g);
   }
} // End class Marble
/////////////////// ShowableObject Class ////////////////////////////
class ShowableObject extends Applet {
	static boolean drawBlue=false;

	public void show (Graphics g) {
		return;
	}
	public void keyPress(Event evt, int key) {
		return;
	}
   	public void mouseDrag(int x, int y) {
		return;
   	}

     	public void setMousePoint(int x ,int y) {
		return;
   	}

}
/////////////////// Back Class ///////////////////////////////
class Back extends ShowableObject {
	static Image backImg;
	int count=0,numMarbles=10;
	int marbleArray [];

   public Back() {
	//Constructor
	marbleArray = new int[numMarbles];
	reset();
   }

   public static void loadImages(Applet parent){
	backImg = parent.getImage(parent.getCodeBase(),"back.jpg");
   }

   public void show(Graphics g) {
	g.drawImage(backImg,0,0,this);
	g.setColor(new Color(255,150,150));
	g.drawString(""+count,351,63);

	if (count>0)
		g.drawString(""+chiSquareTest(),315,99);
	else
		g.drawString("0",315,99);

	for (int i=0;i< numMarbles;i++) {
		g.drawString(""+marbleArray[i],58,187+(19*i));
	}
   }

   public void dropMarble() {
	count++;
	marbleArray[(int)(Math.random()*numMarbles)]++;	
   }

   public void reset() {
	count=0;
	for (int i=0;i< numMarbles;i++) {
		marbleArray[i]=0;
	} 
   }

   public double chiSquareTest() {
	double expected = (count*1.0)/numMarbles;
	double temp = 0.0;

	for (int i=0;i< numMarbles;i++) {
		temp += ((marbleArray[i]-expected)*(marbleArray[i]-expected))/expected;
	}
	return cutDouble(temp);
   }

	public double cutDouble(double value) {
		int dog=(int)Math.round(value*1000);
		return dog/1000.0;
	}

     	public void setMousePoint(int x ,int y) {
		if (x > 248 && x < 382) {
			if (y > 124 && y < 177) {
				// Drop 1 marble
				dropMarble();
			}
			if (y > 178 && y < 228) {
				// Drop 10 marbles
				for (int i = 0; i< 10;i++)
					dropMarble();
			}
			if (y > 229 && y < 278) {
				// Drop 100 marbles
				for (int i = 0; i< 100;i++)
					dropMarble();
			}
			if (y > 317 && y < 365) {
				// Reset
				reset();
			}
		} 
   	}

} // End Class Back