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

public class quiz extends Applet implements ActionListener
{
//q is the question array
static private String q[]={"What is a diode?",
"What does scalability mean?",
"Where did the term robot come from?"};

//d are the "distractors" (choices for answers)
static private String d[]={"a switch"
,"a component allowing one-way flow of current"
,"a light sensor"
,"a design that can be made large or small"
,"making robots move"
,"making robots smart"
,"Leonardo daVinci"
,"Isaac Asimov"
,"K. Capek's Play, RUR"};

//a is the answer array
static private int a[]={2,1,3};
static private int count=0;
private TextField inputOutputField, question, distractor[];
private int correct=0;
private Button displayButton,oneButton,twoButton,threeButton;

public void init()
{
        count=0;
        setLayout(null);

        displayButton=new Button("Display Question");
        displayButton.addActionListener(this);
        add(displayButton);
        displayButton.setBounds(50,10,100,25);

        oneButton=new Button("1");
        oneButton.addActionListener(this);
        add(oneButton);
        oneButton.setBounds(50,75,50,25);

        twoButton=new Button("2");
        twoButton.addActionListener(this);
        add(twoButton);
        twoButton.setBounds(50,125,50,25);

        threeButton=new Button("3");
        threeButton.addActionListener(this);
        add(threeButton);
        threeButton.setBounds(50,175,50,25);

        question=new TextField(q[count],25);
        add(question);

//For longer questions, increase the 3rd parameter in setBounds
        question.setBounds(50,45,350,25);
        question.setEditable(false);

        distractor=new TextField[3];
        for(int x=0;x<3;x++)
        {
                distractor[x]=new TextField(d[x+(3*count)],100);
                add(distractor[x]);
//For longer answers, increase the 3rd parameter in setBounds
                distractor[x].setBounds(125,75+(50*x),350,25);
                distractor[x].setEditable(false);
        }


        inputOutputField=new TextField("Enter your choice",20);
        inputOutputField.setBackground(Color.white);
        add(inputOutputField);
        inputOutputField.setBounds(50,225,200,25);
        inputOutputField.setEditable(false);

}

public void paint(Graphics g)
{
	setBackground(Color.blue);
}

public void actionPerformed(ActionEvent e)
{
        disableButtons();
        if(e.getActionCommand().equals("Display Question"))
        {
                if(count>=q.length)
                {       inputOutputField.setText("No more questions."+
                        " Score: "+correct+"/3");
      			//***change 3 to the number of questions
                }
                else                    
                        displayQuestion();
        }

         if (e.getActionCommand().equals("1")&&a[count]==1)
            {
                    inputOutputField.setText("correct");
                    correct++;
                    count++;

            }
        else if (e.getActionCommand().equals("2")&&a[count]==2)
            {
                    inputOutputField.setText("correct");
                    correct++;
                    count++;
            }                                                   
        else if (e.getActionCommand().equals("3")&&a[count]==3)
            {
                    inputOutputField.setText("correct");
                    correct++;
                    count++; 
           }      
        else if(e.getActionCommand().equals("1")||
                e.getActionCommand().equals("2")||
                e.getActionCommand().equals("3"))
            {
                    inputOutputField.setText("incorrect");
                        count++;
             }
}

public void displayQuestion()
{
        question.setText(q[count]);
        enableButtons();
        for(int x=0;x<3;x++)
        {
                distractor[x].setText(d[x+(3*count)]);
        }
        inputOutputField.setText("");
}

public void disableButtons() {
        oneButton.setEnabled(false);
        twoButton.setEnabled(false);
        threeButton.setEnabled(false);
}

public void enableButtons() {
        oneButton.setEnabled(true);
        twoButton.setEnabled(true);
        threeButton.setEnabled(true);

}

}