package framework;


import java.util.*;

import javax.swing.*;

/**
 * Super class of all classes playing the role of View in
 * the Model-View-Controller pattern.
 *
 * @author pearce
 *
 */
public class View extends JPanel  implements Observer {
	private static final long serialVersionUID = 1L;
	/**
	 * The title on the frame containing this panel
	 */
	protected String title;
	/**
	 * this view is a view of this model
	 */
	protected Model theModel;
	/**
	 * Protected so subclasses can add more menus
	 */
	protected JMenuBar menuBar;
	/**
	 * the file controller handles file menu selections
	 */
	private FileController fc;

	public View(Model model) {
		theModel = model;
		theModel.addObserver(this);
		title = "MVC Framework";
		menuBar = new JMenuBar();
		fc = new FileController(this);
		JMenu fileMenu = GUIUtils.makeMenu("&File", new String[] {"&Open", "&Save", "Save&As", "&Exit"}, fc);
		menuBar.add(fileMenu);
	}

	/**
	 * Initializes view to a new model
	 */
	public void initView() {
		 theModel.setChanged();
		 theModel.setChanged(false);
	}

	/**
	 *  Creates a view frame for this view
	 */
	public void show() {
		 initView();
		 JFrame frame = new JFrame();
		 frame.setTitle(title);
		 frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		 frame.add(this);
		 frame.setJMenuBar(menuBar);
		 frame.pack();
		 frame.setVisible(true);
	}

	@Override
	public void update(Observable o, Object arg) {

	}

	public Model getTheModel() {
		return theModel;
	}

	/**
	 * called when there is a new model
	 * @param theModel the new model
	 */
	public void setTheModel(Model theModel) {
		this.theModel = theModel;
		theModel.addObserver(this);
		initView();
	}
}