import javabook.*;
import java.awt.*;

/**
 * DrawingLab1
 * Inspired by a lab from Jeff Ondich
 * @author Dave Musicant
 * @version 1.0 10/2/01
 *
 * This class is used to open a graphics window
 * and draw a red circle in the center.
 *
 * Try doing these things:
 * 0. Compile this class.
 * 1. Create another class called DrawingLab1Main that just contains
 *    a main method.
 * 2. In that main method, create a DrawingLab1 object and
 *    call the method "start".
 * 3. Run the method "main" in DrawingLab1Main.
 * 4. Read all the Java code to find out how it works.
 * 5. Modify the code so that the circle appears in a different
 *    location on the screen.
 * 6. Make the circle green.
 */

class DrawingLab1
{
    // Data values
    final int centerX = 200;
    final int centerY = 100;
    final int radius = 50;

    DrawingBoard drawingBoard;  // DrawingBoard is a special type of MainWindow
    MessageBox messageBox;

    /**
      * Constructor
      */
    public DrawingLab1()
    {
        // Create objects for the DrawingBoard and other input / output
        drawingBoard = new DrawingBoard("Time to do some drawing");
        messageBox = new MessageBox(drawingBoard);

        // Make the drawingBoard visible and bring to front
        drawingBoard.setVisible(true);
        drawingBoard.toFront();
    }

    /**
      * Method that does the actual drawing.
      */
    public void start()
    {
        drawingBoard.setColor(Color.red);
        drawingBoard.drawCircle(centerX,centerY,radius);
        messageBox.show("I drew a circle!");
    }

}