import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
/**
 * WindowManager provides the graphical output  that mimics
 * a system window manager. 
 * 
 * The WindowManager object uses a ListManager to manage
 * a list of windows (rectangles)
 *
 **/

public class WindowManager extends JFrame implements MouseListener{

	private ListManager mgr;

	private int x;
	private int y;

	/**
	 * Answers a WindowManager object
	 *
	 * @param ListManager m the list manager that keeps
	 *                      the actual list of windows/rectangles to 
	 *                      be drawn
 	 **/
	public WindowManager(ListManager m) {

		mgr = m;
		setSize(800,800);
		setLocation(100,100);
		addMouseListener(this);
		setDefaultCloseOperation(EXIT_ON_CLOSE);
		setVisible(true);

	}

	public void paint(Graphics g) {
	mgr.setIndex(); //start at the oldes rectangle in the list

	while (mgr.hasMore() ) {
		// get the next Rect and draw it...
		Rect next = mgr.getNextRect();
		int x = next.getX();
		int y = next.getY();
		g.setColor(Color.black);
		g.fillRect(x-2,y-2,134,84);
		g.setColor(Color.cyan);
		g.fillRect(x, y,130,80);
	}	

	}

	public void mouseReleased(MouseEvent e ) { }
        public void mouseEntered(MouseEvent e) { }
        public void mouseExited(MouseEvent e) { }
        public void mousePressed(MouseEvent e) { }
        public void mouseClicked(MouseEvent e) {

		// get (x,y) of where the mouse button was clicked 
		x = e.getX();
		y = e.getY();

		// figure out which button was clicked

		if ((e.getModifiers() & InputEvent.BUTTON1_MASK) ==
			InputEvent.BUTTON1_MASK) 
		{
			// moveToRear() finds the rectangle containing (x,y) and
			// move this rectangle to the end of the list
			// ...when we repaint, it will be painted last
			// so it will appear 'on top'
			mgr.moveToRear(x,y);
		}
		if ((e.getModifiers() & InputEvent.BUTTON2_MASK) ==
			InputEvent.BUTTON2_MASK) 
		{
			// add a new rectangle with (x,y) as the
			// upperleft corner
			mgr.add(x,y);
		}

		repaint();}



	public static void main(String argv[]) {
	ListManager m = new ListManager();
	WindowManager c = new WindowManager(m);
	
	}


}