// W4frame.java
//           demonstrate simple menus, file open

import java.awt.*;
import java.awt.event.*;
import java.text.*;
import java.io.*;
import javax.swing.*;
import javax.swing.filechooser.*;

public class W4frame extends JFrame
{
  int orderValues[] = {2, 3, -1, -2}; // -1 is code for N/2 -2 is code for N     
  int orderItemValue; // set to order code
  int optionItemValues[];
  JRadioButtonMenuItem orderItems[], options[];
  ButtonGroup optionGroup, orderGroup;
  MyJPanel panel;
  private JDesktopPane theDesktop;
  
  public W4frame()
  {
    setTitle("W4frame demonstration");
    setSize(300,370);
    setBackground(Color.white);
    setForeground(Color.black);

    // create menu bar and attach it to AwtMenuTest window
    JMenuBar bar = new JMenuBar();  
    setJMenuBar(bar);  

    // set up File menu
    JMenu fileMenu = new JMenu("File");
    bar.add(fileMenu);  // add File menu to menu bar
    // set up File items
    JMenuItem newItem = new JMenuItem("New");
    fileMenu.add(newItem);
    JMenuItem openItem = new JMenuItem("Open");
    fileMenu.add(openItem);
    JMenuItem printItem = new JMenuItem("Print");
    fileMenu.add(printItem);
    JMenuItem quitItem = new JMenuItem("Quit");
    fileMenu.add(quitItem);

    // set up Enter menu
    JMenu enterMenu = new JMenu("Enter");
    bar.add(enterMenu);       // add Enter menu to menu bar 
    // set up Enter items
    JMenuItem easyItem = new JMenuItem("Easy");
    enterMenu.add(easyItem);
    JMenuItem completeItem = new JMenuItem("Complete");
    enterMenu.add(completeItem);

    // set up plot area
    theDesktop = new JDesktopPane();
    getContentPane().add(theDesktop);
    // Create internal frame
    JInternalFrame frame = new JInternalFrame(
        "Plot area", true, true, true, true);
    // attach panel to internal frame
    Container container = frame.getContentPane();
    panel = new MyJPanel();
    container.add(panel, BorderLayout.CENTER);
    // set size of internal frame to size of its contents
    frame.pack(); // uses class Dimension
    theDesktop.add(frame);
    panel.addMouseListener (new mousePressHandler());
    frame.setVisible(true);

    newItem.addActionListener(new ActionListener()
      {public void actionPerformed(ActionEvent event)
      {
        System.out.println("File New"); // action if simple and short
      }});                              // call function if long or complex
    openItem.addActionListener(new ActionListener()
      {public void actionPerformed(ActionEvent event)
      {
         System.out.println("File Open");
	 JFileChooser chooser = new JFileChooser();
	 // // Note: needs compiled ExampleFileFilter
	 // ExampleFileFilter filter = new ExampleFileFilter();
	 // filter.addExtension("draw");
	 //filter.setDescription(".draw Images");
	 FileNameExtensionFilter filter = new FileNameExtensionFilter(
				     ".draw files", "draw");
	 chooser.setFileFilter(filter);
	 int returnVal = chooser.showOpenDialog(W4frame.this);
	 if(returnVal == JFileChooser.APPROVE_OPTION) {
	     System.out.println("You chose to open this file: " +
				chooser.getSelectedFile().getName());
	 }
 
      }});
    printItem.addActionListener(new ActionListener()
      {public void actionPerformed(ActionEvent event)
      {
        System.out.println("File Print");
      }});
    quitItem.addActionListener(new ActionListener()
      {public void actionPerformed(ActionEvent event)
      {
        System.out.println("File Quit");
      }});
    easyItem.addActionListener(new ActionListener()
      {public void actionPerformed(ActionEvent event)
      {
        System.out.println("Enter Easy");
      }});
    completeItem.addActionListener(new ActionListener()
      {public void actionPerformed(ActionEvent event)
      {
        System.out.println("Enter Complete");
      }});
    addWindowListener(new WindowAdapter()
      {
        public void windowClosing(WindowEvent e)
        {
          System.exit(0);
        }
      });
 
    setVisible(true);
  } // end constructor W4frame

  class mousePressHandler extends MouseAdapter
  {
    public void mousePressed (MouseEvent e)
    {

      // for future use

      panel.repaint();
    }
  } // end mousePressHandler

  class MyJPanel extends JPanel
  {
    MyJPanel(){} // default, just to have "paint" dependent

    public void paintComponent(Graphics g)
    {
      g.clearRect(0, 0, 1000, 1000); // cover non-erase bug
      g.setColor(Color.blue);
      g.drawString("make menu selection", 100, 100);

      // for future use

    } // end paint

    // return dimensions for sizing
    public Dimension getPreferredSize()
    {
      return new Dimension(300, 350);
    }
  } // end MyJPanel

  public static void main (String[] args) // no args expected
  {
    new W4frame();
  } // end main
} // end class W4frame