package framework;

import javax.swing.*;
import javax.swing.event.*;
import java.awt.event.*;
import java.awt.*;
import java.io.*;
import java.lang.reflect.*;
import java.util.*;


/**
   Base class for the application's main window.
   <p>
   Includes working File and Help menus.
   <p>
   Example:
   <pre>
      public class MyAppWindow extends AppWindow {
         public MyAppWindow(MyModel model) {
		    super(model);
		    // add custom views and windows here
	     }
	     public static void main(String[] args) {
			 javax.swing.SwingUtilities.invokeLater(new Runnable() {
                public void run() {
				   MyModel model = new MyModel();
                   AppWindow gui = new MyAppWindow(model);
                   gui.setVisible(true);
             }
        });
	  }
   }
   </pre>
 */
public class AppWindow extends JFrame {
   	protected JMenu fileMenu;
   	protected JMenu helpMenu;
   	/**
   	   Subclasses can add more menus to this menu bar
   	 */
   	protected JMenuBar menuBar;
   	/**
   	 Subclasses of AppView should be added to this set.
   	 */
   	protected Set<AppView> views = new HashSet<AppView>();

   	/**
   	   Change as desired or call Window.pack()
   	 */
   	public static final int FRAME_WIDTH = 700;
   	/**
	   Change as desired or call Window.pack()
   	 */
   	public static final int FRAME_HEIGHT = 400;
   	/**
   	   The application model
   	 */
    protected Model model;
    /**
     Used by controllers and views to fetch the current model.

     @return the current model
     */
    public Model getModel() { return model; }

    /**
     Sets the current model to a new model and notifies all views

     @param m  the new model
     */
    public void setModel(Model m) {
		model = m;
		for(AppView view: views) {
			view.setModel(model);
		}
		model.notifyViews();
	}
	/**
	   Initializes look&feel, title, model, & menus

	   @param m  the initial model
	 */
	public AppWindow(Model m) {

		try {
			String lookAndFeel = UIManager.getCrossPlatformLookAndFeelClassName();
    		UIManager.setLookAndFeel(lookAndFeel);
    		setDefaultLookAndFeelDecorated(true);
		} catch (Exception e) { }

		model = m;
		setTitle(model.getClass().getName());
      	setSize(FRAME_WIDTH, FRAME_HEIGHT);
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

		// init menus:
        menuBar = new JMenuBar();
		setJMenuBar(menuBar);

        fileMenu = FrameworkUtils.makeMenu("&File",
        	new String[] {"&New", "&Save", "Sa&ve As", "&Open", "&Quit"},
        	new FileMenuController(this));
        menuBar.add(fileMenu);

        helpMenu = FrameworkUtils.makeMenu("&Help",
            new String[] {"&About", "&Help"},
            new HelpMenuController(this));
        menuBar.add(helpMenu);
    }
    /**
     Adds a view to the views set. This should be called
     in subclasses to add new views.
     <p>
     This method also sets the model and adds the view to
     the JFrame, which I think works for Java 5.0.

     @param  view  The new view
     */
    protected void addView(AppView view) {
		views.add(view);
		view.setModel(model);
		add(view);
	}
	/**
	 Called when the user selects Help/Help.
	 This method should be overridden by subclasses.
	 */
	public void help() {
       FrameworkUtils.error("Sorry, this item isn't implemented");
	}
	/**
      Called when the user selects Help/About.
     */
     protected void about() {
		JOptionPane.showMessageDialog(null,
            new String[] {"Application Framework",
                        "Copyright(c) 2001",
                        "All rights reserved"},
            "About",
            JOptionPane.INFORMATION_MESSAGE);
      }
}