// OvalDrawing.java
// A solution to CS 5JA assignment 4, part 1, Winter 2009
// cmc, updated 2/9/09

import java.awt.Graphics;
import javax.swing.JPanel;

public class OvalDrawing extends JPanel {

    private int ovals; // number of ovals to draw

    // constructor sets the number of ovals
    public OvalDrawing(int number) {
        ovals = number;
    }

    // draws the ovals
    public void paintComponent(Graphics g) {
        super.paintComponent( g );

        double width = getWidth(), height = getHeight();

        // find size of the smallest oval
        double smallestWidth = width / ovals;
        double smallestHeight = height / ovals;
      
        // find the middle of the panel
        double centerX = width / 2;
        double centerY = height / 2;

        // draw ovals starting with the innermost (smallest) one
        double x, y, w, h;
        for (int i = 1; i <= ovals; i++) {
            w = i * smallestWidth;
            h = i * smallestHeight;
            x = centerX - w / 2;
            y = centerY - h / 2; 
            g.drawOval((int)x, (int)y, (int)w, (int)h);
        }
    }
}