/* 
<APPLET CODE="FlashCard.class" WIDTH=503 HEIGHT=201></APPLET>
*/

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

public class FlashCard extends Applet {
	PanelNumber p_Numbers;
	ScorePanel p_Score;

public void init() {
	p_Score = new ScorePanel();
	p_Numbers = new PanelNumber(p_Score);
	this.setLayout(new BorderLayout());
	p_Score.setLayout(new GridLayout(2,1,10,10));	

	add("West",p_Numbers);
	add("Center",p_Score);
}

public boolean mouseDown(Event evt, int x, int y) {
	System.out.println("X: "+x+" Y: "+y);
	p_Numbers.repaint();
	return true;
}
} // End Class FlashCard

//////////////////

class PanelNumber extends Panel {
   int problemType;
   String s, userS;
   int numA, numB, solution, appX, appY, xNum, yNum;
   Dimension size;
   ScorePanel p_Score;

   public PanelNumber(ScorePanel p_Score) {
	this.p_Score = p_Score;
	appX = this.size().width;
	appY = this.size().height;
	appX = 320;
	appY = 200;

	size = new Dimension (appX,appY);

	xNum = 20;
	yNum = 119;

	setBackground(Color.white);
	problemType = 0;
	userS = "?";
	nextProblem();
   }
   public void nextProblem() {
	switch((p_Score.d.getSelectedIndex())) {
		case 0:
			addProblem();
			break;
		case 1:
			subProblem();
		default:
	} // End switch
   }

   public void paint(Graphics g) {
	drawCard(g);
	g.setFont(new Font("ARIAL",Font.BOLD,48));
	g.setColor(Color.black);
	g.drawString(s+userS,xNum,yNum);
   }

   public void drawCard(Graphics g) {
	g.setColor(new Color(190,190,240));
	for (int i=40;i<appY;i+=15) {
		g.drawLine(0,i,appX-1,i);
	}

	g.setColor(Color.black);
	g.drawRect(0,0,appX-1, appY);
	g.drawRect(1,1,appX-2, appY-1);
   }

   public void addProblem() {
	numA = (int)(Math.random()*100);
	numB = (int)(Math.random()*100);
	s = ""+numA+" + "+numB+" = ";
	solution = numA + numB;
   }
   public void subProblem() {
	numA = (int)(Math.random()*100);
	numB = (int)(Math.random()*100);
	if (numA > numB){
		s = ""+numA+" - "+numB+" = ";
		numB = numB*-1;
	}
	else{
		s = ""+numB+" - "+numA+" = ";
		numA = numA*-1;
	}

	solution = Math.abs(numA + numB);
   }
   public boolean keyDown(Event evt, int key) {
	// Evaluate
	if (key == '\n') {
		if (userS.equals("?"))
			System.out.println("Nothing");
		else {
		      if (userS.equals(""+solution)) {
				p_Score.setCorrect();
				userS = "?";
				nextProblem(); 
			} else {
			//	userS = "?";
				p_Score.setTries();
			}
		} // End else
	}
	if (key >= '0' && key <= '9') {
		if (userS.equals("?"))
			userS = ""+(char)key;
		else
			userS += (char)key;
	}
	if (key == Event.DELETE || key == 8) {
		userS = "?";
	}
	repaint();
	return true;
   } // End key

  	public Dimension getMinimumSize() {
		return size;
	}
	public Dimension getPreferredSize(){
		return size;
	}

} // End Class PanelNumber

/////////////////////////////////

class ScorePanel extends Panel {
	Image back;
	Panel a,b,c;
int correct, try2;
TextField ta1 = new TextField(5);
TextField ta2 = new TextField(5);
TextField ta3 = new TextField(5);
	Choice d = new Choice();
	Choice e = new Choice();

public ScorePanel () {
	try2 = 0;
	correct = 0;
	a = new Panel();
	a.setLayout(new GridLayout(2,2,10,10));
	b = new Panel();
	b.setLayout(new BorderLayout());
	c = new Panel();
	c.setLayout(new GridLayout(3,2,10,10));


	d.addItem("Addition");
	d.addItem("Subtraction");
//	d.addItem("Multiplication");
//	d.addItem("Division");
//	d.addItem("Random");
	
	e.addItem("1");
	e.addItem("5");
	e.addItem("10");
	e.addItem("20");
	
	a.add(new Label("Problem Type"));
	a.add(d);
	
	a.add(new Label("# of Problems"));
	a.add(e);
	b.add("Center",a);
	b.add("South",new Button("Start Over"));
	add(b);

c.add(new Label("# Correct: "));
c.add(ta1);
c.add(new Label("# Missed: "));
c.add(ta2);
c.add(new Label("Total #: "));
c.add(ta3);

add(c);
}

public void setCorrect() {
	correct++;
	ta1.setText(""+correct);
	ta3.setText(""+(try2+correct));

}
public void setTries() {
	try2++;
	ta2.setText(""+try2);
	ta3.setText(""+(try2+correct));
}
} // End Class ScorePanel