// Exercise10_14.java: Display a pie chart
import java.awt.*;
import javax.swing.*;

public class Exercise10_14 extends JFrame
{
  public static void main(String[] args)
  {
    JFrame frame = new Exercise10_14();
    frame.setSize(300, 300);
    frame.setTitle("Exercise 10.14");
    frame.setVisible(true);
  }

  public Exercise10_14()
  {
    getContentPane().add(new PieChart1());
  }
}

class PieChart1 extends JPanel
{
  public void paintComponent(Graphics g)
  {
    super.paintComponent(g);

    int w = getWidth();
    int h = getHeight();
    int xCenter = w/2;
    int yCenter = h/2;
    int radius = (int)(Math.min(w, h)*0.8/2);
    int x = xCenter - radius;
    int y = yCenter - radius;

    // Draw the arc for projects
    g.setColor(Color.red);
    g.fillArc(x, y, 2*radius, 2*radius, 0, (int)(20*360/100));
    g.setColor(Color.black);
    g.drawString("Project -- 20%",
      (int)(xCenter + radius*Math.cos(2*Math.PI*0.1)),
      (int)(yCenter - radius*Math.sin(2*Math.PI*0.1)));

    // Draw the arc for quizzes
    g.setColor(Color.green);
    g.fillArc(x, y, 2*radius, 2*radius, (int)(20*360/100),
      (int)(10*360/100));
    g.setColor(Color.black);
    g.drawString("Quizzes -- 20%",
      (int)(xCenter + radius*Math.cos(2*Math.PI*0.25)),
      (int)(yCenter - radius*Math.sin(2*Math.PI*0.25)));

    // Draw the arc for midterm exams
    g.setColor(Color.blue);
    g.fillArc(x, y, 2*radius, 2*radius, (int)(30*360/100),
      (int)(30*360/100));
    g.setColor(Color.black);
    g.drawString("Midterms -- 20%",
      (int)(xCenter + radius*Math.cos(2*Math.PI*0.45)),
      (int)(yCenter - radius*Math.sin(2*Math.PI*0.45)));

    // Draw the arc for the final exam
    g.setColor(Color.orange);
    g.fillArc(x, y, 2*radius, 2*radius, (int)(60*360/100),
      (int)(40*360/100));
    g.setColor(Color.black);
    g.drawString("Midterms -- 20%",
      (int)(xCenter + radius*Math.cos(2*Math.PI*0.8)),
      (int)(yCenter - radius*Math.sin(2*Math.PI*0.8)));
  }
}