import javax.swing.*;
import java.awt.*;
/**
 * DrawingPanel creates a panel used for drawing
 * a map
 **/
class DrawingPanel extends JPanel
{


private Graphics g; //used for drawing on the panel
private boolean  timeToDrawPath = false;
private String pathFile = null;

	public DrawingPanel() {
	setBackground(Color.white); //for drawing the maps
	}



	public void paint(Graphics grph) {
	g = grph;

	super.paint(g);
	processUSA();

	if (timeToDrawPath) drawPath();

        }

	/**
	 * processUSA() draws line segments to create
	 * the map of the USA
	 **/
	public void processUSA() {
	
	g.drawLine( 50, 50, 200, 200); //just an example of how to draw
				       // a single line segment from (50,50)
				       // to (200,200)
	}

	/**
	 * processPath receives the file name containing the
	 * coordinates for the hurricane path
	 * 
	 * @param String filename file containing the coordinates for
	 *                        the line segments that produce
	 *			  the path of the hurricane 
         **/ 
	public void processPath(String filename) {
		// complete method
		pathFile = filename;	
		timeToDrawPath= true; //used in paint()
		repaint();
	}

	/**
	 * drawPath() uses the (x,y)coordinates in the file specified
	 * by pathFile to draw the line segments for the hurricane path
	 * 
	 **/
	private void drawPath() {

       		g.drawLine( 115,125,10,150); //  another example of how to draw
 
	}
}