/* COSC 304 section 2
   LUKE BURGESS
   luke_burgess@hotmail.com
   @00205854
   Oct 08 2000 */

// Lab task: Chapter 6, Exercise 6.32, page 264
// Exercise32p264.java

// Applet generates single digit multiplication problems
// and random text responses from a pre-defined list.

import javax.swing.*;
import java.awt.*;
import java.awt.Color;
import java.awt.event.*;

// Note: Applets have a problem rendering Paint graphics when 
// Swing components are attached to the UI.  Consequently, this
// solution does not use paint

public class Exercise32p264 extends JApplet implements ActionListener {
   JTextField input, response, question;
   JLabel prompt;
   String questionString, correctResponse, incorrectResponse;
   int answer;

   public void init() {

      input = new JTextField( 4 );
      input.addActionListener( this );

      prompt = new JLabel( "Enter your answer: " );

      response = new JTextField( 20 );
      response.setEditable( false );
      response.setBackground(Color.decode("#ccccff"));

      question = new JTextField( 20 );
      question.setEditable( false );
      question.setBackground(Color.decode("#ccccff"));

      Container c = getContentPane();
      c.setLayout( new FlowLayout() );
      c.setBackground(Color.decode("#ccccff"));

      c.add( question );
      c.add( prompt );
      c.add( input );
      c.add( response );

      createQuestion();

   } // init ()

   public void start() {
      question.setText( questionString );
   }

   // Create a new question and corresponding answer
   public void createQuestion() {

      int digit1 = getNumber();
      int digit2 = getNumber();
   
      answer = digit1 * digit2;
      questionString = "How much is " + digit1 + " times " + digit2 + " ?";
   } // createQuestion()

   public int getNumber() {
      return ( ( int ) ( Math.random() * 10 ) );
   }

   public void actionPerformed( ActionEvent e ) {
      int guess = Integer.parseInt( input.getText() );

      input.setText( "" );

      switch( getResponseNumber() ) {
         case 1:
            correctResponse = "Very good!";
            incorrectResponse = "No. Please try again.";
            break;
         case 2:
            correctResponse = "Excellent!";
            incorrectResponse = "Wrong. Try once more.";
            break;
         case 3:
            correctResponse = "Nice work!";
            incorrectResponse = "Don't give up!";
            break;
         case 4:
            correctResponse = "Keep up the good work!";
            incorrectResponse = "No. Keep trying.";
            break;
         case 5:
            correctResponse = "Correct.";
            incorrectResponse = "Incorrect.";
            break;
         case 6:
            correctResponse = "Cool !";
            incorrectResponse = "Nope!";
            break;
         case 7:
            correctResponse = "Brilliant!";
            incorrectResponse = "Not bad! Try again.";
            break;
         case 8:
            correctResponse = "Superb!";
            incorrectResponse = "Unlucky. Have another go.";
            break;
         case 9:
            correctResponse = "Way to go!";
            incorrectResponse = "I know you can do this!";
            break;
         case 10:
            correctResponse = "Keep it up!";
            incorrectResponse = "Try harder.";
            break;
         case 11:
            correctResponse = "Good job!";
            incorrectResponse = "You can do better than that.";
            break;
         case 12:
            correctResponse = "Well done!";
            incorrectResponse = "Come on!";
            break;
      } // switch ()

      if ( guess == answer ) {
         response.setText( correctResponse );
         createQuestion();
      }
      else
         response.setText( incorrectResponse );

      question.setText( questionString );

   } // actionPerformed()

   public int getResponseNumber() {
      return ( 1 + ( int ) ( Math.random() * 12 ) );
   }

} // class Exercise32p264