// CornerLines.java - a solution to CS 5JA assignment 3, part 2, Winter 2009
// Draws lines fanning from the corners to the middle of the panel.
// updated by cmc, 1/24/09

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

public class CornerLines extends JPanel {

    public void paintComponent( Graphics g ) {
        super.paintComponent( g );
      
        int increments = 15;
        int width = getWidth();
        int height = getHeight();
        int widthStep = width / increments;
        int heightStep = height / increments;
      
        int count = 0;
        while ( count < increments ) {

            // lines fanning from the top-left (part 2a of assignment 3)
            g.drawLine( 0, 0, count * widthStep,
                              height - count * heightStep );
         
            // lines fanning from the bottom-right
            g.drawLine( width, height, count * widthStep,
                                       height - count * heightStep );
         
            // lines fanning from the bottom-left
            g.drawLine( 0, height, count * widthStep, count * heightStep );
         
            // lines fanning from the top-right
            g.drawLine( width, 0, count * widthStep, count * heightStep );
         
            count++;
        }
    }
}