// File: Form.java (Module 11)
//
// Author: Rahul Simha
// Created: November 4, 1998.
//
// Same as Form5.java.

import java.awt.*;
import java.awt.event.*;
import java.util.*;
import java.io.*;

class NewFrame extends Frame {

  // Data.
  Panel centerpanel;       // For the questions.
  ScrollPane sc;           // For placing the centerpanel.

  TextField lastname_tf;   // To get the lastname.
  String lastname;

  TextField firstname_tf;  // Firstname.
  String firstname;

  TextField networth_tf;   // Net worth
  String networth;

  TextArea address_ta;     // Address (TextArea)
  String address;

  MenuBar mb;              // The menubar.

  PopupMenu pm;            // The popup menu.


  // Constructor.
  public NewFrame (int width, int height)
  {
    this.setTitle ("Snoot Club Membership Form");
    this.setResizable (true);
    this.setBackground (Color.white);
    this.setSize (width, height);
    // this.setLayout (new BorderLayout());

    // First, a welcome message:
    Label L = new Label ("Please fill out the following form:");
    L.setFont (new Font ("Serif", Font.BOLD | Font.ITALIC, 15));
    L.setForeground (Color.blue);
    this.add (L, BorderLayout.NORTH);

    // Now the center panel.
    centerpanel = new Panel ();
    centerpanel.setLayout (new GridLayout (4,1));
    centerpanel.add (first_name ());
    centerpanel.add (last_name ());
    centerpanel.add (net_worth ());
    centerpanel.add (address ());

    // Next, the scrollpane.
    sc = new ScrollPane ();
    sc.add (centerpanel);
    this.add (sc, BorderLayout.CENTER);

    // The menubar
    mb = new MenuBar ();

    // Add a "File" menu with two items.
    Menu file_menu = new Menu ("File");
    file_menu.add ("Load");
    file_menu.add ("LoadFromFile");
    file_menu.add ("Quit");
    file_menu.addActionListener (
      new ActionListener () {
        public void actionPerformed (ActionEvent a)
	{
	  String item = a.getActionCommand ();
	  if (item.equals ("Load")) 
	    load ();
	  if (item.equals ("LoadFromFile"))
	    load_new ();
	  else if (item.equals ("Quit"))
	    System.exit (0);
	}  
      }
    );
    mb.add (file_menu);

    // Add an "Action" menu with two items.
    Menu action_menu = new Menu ("Action");
    action_menu.add ("Submit");
    action_menu.add ("Clear");
    action_menu.addActionListener (
      new ActionListener () {
        public void actionPerformed (ActionEvent a)
	{
	  String item = a.getActionCommand ();
	  if (item.equals ("Submit"))
	    submit ();
	  else if (item.equals ("Clear")) {
	    firstname = "";  firstname_tf.setText (firstname);
	    lastname = "";  lastname_tf.setText (lastname);
	    networth = "";  networth_tf.setText (networth);
	    address = "";  address_ta.setText (address);
	  }
	}  
      }
    );
    mb.add (action_menu);

    // Note how a menubar is added to a Frame.
    this.setMenuBar (mb);

    // A pop-up menu
    pm = new PopupMenu ();
    pm.add ("Top");
    pm.add ("Bottom");
    pm.addActionListener (
      new ActionListener () {
        public void actionPerformed (ActionEvent a)
	{
	  String item = a.getActionCommand ();
	  if (item.equals ("Top"))
	    top ();
	  else if (item.equals ("Bottom"))
	    bottom ();
	}  
      }
    );
    // We add this to the frame.
    this.add (pm);    

    // Finally, show the frame.
    this.setVisible (true);
  }


  // No-parameter constructor.
  public NewFrame () 
  {
    this (500, 300);
  }


  // Read in the first name.

  Panel first_name ()
  {
    Panel subpanel = new Panel ();

    Label L = new Label ("First Name");
    L.setFont (new Font ("SansSerif", Font.ITALIC, 20));
    subpanel.add (L);

    // Listen for a Popup click.
    L.addMouseListener (getMouseListener (L));

    firstname_tf = new TextField (20);
    firstname_tf.setForeground (Color.blue);
    firstname_tf.addTextListener (
      new TextListener () {
        public void textValueChanged (TextEvent t)
	{
	  firstname = firstname_tf.getText();
	}  
      }
    );
    subpanel.add (firstname_tf);
    subpanel.addMouseListener (getMouseListener(subpanel));

    return subpanel;
  }


  // Get last name.

  Panel last_name ()
  {
    Panel subpanel = new Panel ();

    Label L = new Label ("Last Name");
    L.setFont (new Font ("SansSerif", Font.ITALIC, 20));
    subpanel.add (L);

    // Listen for a Popup click.
    L.addMouseListener (getMouseListener (L));

    lastname_tf = new TextField (20);
    lastname_tf.setForeground (Color.blue);
    lastname_tf.addTextListener (
      new TextListener () {
        public void textValueChanged (TextEvent t)
	{
	  lastname = lastname_tf.getText();
	}  
      }
    );
    subpanel.add (lastname_tf);
    subpanel.addMouseListener (getMouseListener(subpanel));

    return subpanel;
  }


  // Get net worth.

  Panel net_worth ()
  {
    Panel subpanel = new Panel ();

    Label L = new Label ("Net worth (in millions)");
    L.setFont (new Font ("SansSerif", Font.ITALIC, 20));
    subpanel.add (L);

    // Listen for a Popup click.
    L.addMouseListener (getMouseListener (L));

    networth_tf = new TextField (10);
    networth_tf.setForeground (Color.blue);
    networth_tf.addTextListener (
      new TextListener () {
        public void textValueChanged (TextEvent t)
	{
	  networth = networth_tf.getText();
	}  
      }
    );
    subpanel.add (networth_tf);
    subpanel.addMouseListener (getMouseListener(subpanel));

    return subpanel;
  }


  // Get address via a TextArea.

  Panel address ()
  {
    Panel subpanel = new Panel ();

    Label L = new Label ("Address");
    L.setFont (new Font ("SansSerif", Font.ITALIC, 20));
    subpanel.add (L);

    // Listen for a Popup click.
    L.addMouseListener (getMouseListener (L));

    address_ta = new TextArea (4, 30);
    address_ta.setForeground (Color.blue);
    address_ta.addTextListener (
      new TextListener () {
        public void textValueChanged (TextEvent t)
	{
	  address = address_ta.getText();
	}  
      }
    );
    subpanel.add (address_ta);
    subpanel.addMouseListener (getMouseListener(subpanel));

    return subpanel;
  }


  // Process data when ready.

  void submit ()
  {
    // Create a file by concatenating firstname and lastname.
    String filename = firstname + lastname;
    if (filename.length() == 0) return;

    // We will use a "Properties" instance to store data.
    Properties p = new Properties ();
    p.put ("firstname", firstname);
    p.put ("lastname", lastname);
    p.put ("networth", networth);
    p.put ("address", address);

    // Use the "save" feature of the Properties instance.
    try {
      FileOutputStream f = new FileOutputStream (filename);
      p.save (f, "Member information");
    }
    catch (IOException e) {
      System.out.println (e);
      System.exit (0);
    }
  }


  // Load information from an existing Properties file.

  Properties info;

  // We will use a File instance.

  void load ()
  {
    String dir = null;
    String filename = firstname + lastname;
    File file = new File (dir, filename);
    load (file);
  }

  Dialog error_dialog;

  void load (File file) 
  {
    info = new Properties ();
    try {
      FileInputStream f = new FileInputStream (file);
      info.load (f);
      firstname = info.getProperty ("firstname");
      firstname_tf.setText (firstname);
      lastname = info.getProperty ("lastname");
      lastname_tf.setText (lastname);
      networth = info.getProperty ("networth");
      networth_tf.setText (networth);
      address = info.getProperty ("address");
      address_ta.setText (address);
    }
    catch (IOException e) {
      // Handle a file error more gracefully.
      error_dialog = new Dialog (this, true);
      error_dialog.setSize (200, 100);
      error_dialog.setBackground (Color.yellow);
      Label L = new Label ("File does not exist");
      Button ok = new Button ("OK");
      ok.addActionListener (
        new ActionListener () {
          public void actionPerformed (ActionEvent a)
	  {
	    error_dialog.dispose();
  	  }  
        }
      );

      error_dialog.setLayout (new BorderLayout());
      error_dialog.add (L, BorderLayout.CENTER);
      error_dialog.add (ok, BorderLayout.SOUTH);
      // Need to make it visible.
      error_dialog.setVisible (true);
    }
    
  }

  // Use a file dialog.

  void load_new ()
  {
    // Create the FileDialog instance.
    FileDialog fd = 
      new FileDialog (this, "File to load from", FileDialog.LOAD);

    // Note: need to make it visible.
    fd.setVisible (true);

    // When the user is done, get the info.
    String dir = fd.getDirectory ();
    String filename = fd.getFile ();
    String fullname = dir + filename;

    // Create a full filename.
    File file = new File (fullname);
    load (file);
  }


  // Create a Listener for popup's.

  MouseListener getMouseListener (Component c)
  {
    class PopupMouseListener extends MouseAdapter {
      Component c;
      public PopupMouseListener (Component c)
      {
	this.c = c;
      }
      public void mousePressed (MouseEvent m)
      {
	// We need this special check.
	if (m.isPopupTrigger ()) 
	  pm.show (c, m.getX(), m.getY());
	// Note: this "show" method is not deprecated.
      }  
    }

    return new PopupMouseListener (c);
  }


  // Handle the "go to top" event.

  void top ()
  {
    sc.setScrollPosition (0,0);
  }

  // Handle the "go to bottom" event.

  void bottom ()
  {
    int height = sc.getViewportSize().height;
    sc.setScrollPosition (0,height);
  }

}


public class Form {
  public static void main (String[] argv)
  {
    NewFrame nf = new NewFrame (500, 300);
  }
}