//
// Student Name: Aleman Meza, Boanerges

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import java.net.*;

/**
* Applet for Binary Tree
*/
public class Dsv1 extends JApplet
{
   private JPanel northPanel, westPanel, eastPanel, southPanel;
   private JPanel subSouthPanel;
   private DrawPanel drawArea;
   protected JLabel statusLabel;
   protected JTextField preTextField, inTextField, postTextField;
   protected JButton clearButton, enterButton, findButton, deleteButton;
   private int width = 620, height = 450;
   protected boolean amIanApplication;
   protected String dsvInfo, llInfo;

   public void setWidth(int w)
   {
      width = (w >= 0 ? w : width);
   }

   public void setHeight(int h)
   {
     height = (h >= 0 ? h : height);
   }

   public void init(boolean isApplication)
   {
      amIanApplication = isApplication;
      init();
   }

   public void checkButtons()
   {
      boolean enabled = drawArea.hasElements();
      findButton.setEnabled(enabled);
      deleteButton.setEnabled(enabled);
      preTextField.setText(drawArea.getPreOrder());
      inTextField.setText(drawArea.getInOrder());
      postTextField.setText(drawArea.getPostOrder());
   }

   public void init()
   {
      statusLabel = new JLabel("Welcome to DSV - Binary Tree Made Easy");

      northPanel = new JPanel();
      westPanel = new JPanel();
      eastPanel = new JPanel();
      southPanel = new JPanel();
      drawArea = new DrawPanel();

      preTextField = new JTextField();
      preTextField.setEditable(false);
      inTextField = new JTextField();
      inTextField.setEditable(false);
      postTextField = new JTextField();
      postTextField.setEditable(false);


      dsvInfo = "The Data Structures Visualization\n"+
      "(DSV) Group is comprised of three\n"+
      "Graduate Students at the University\n"+
      "of Georgia under the supervision of\n"+
      "Dr. Eileen Kraemer.  DSV's purpose\n"+
      "is to provide interactive learning\n"+
      "for the CSCI 2720 Data Structures\n"+
      "Course at the University of Georgia.\n"+
      "\n\n\n\n\n"+
      "DSV Group:\n"+
      "           Boanerges Aleman\n"+
      "           Navdeep Latawa\n"+
      "           James Skinner\n";
      llInfo  =       "Binary Tree info. at \n" +
      "www.cs.uga.edu/~boanerg/hci2/partc/bintree";
 

      JMenuBar menuBar = new JMenuBar();
      setJMenuBar (menuBar);
 
      JMenu optionMenu = new JMenu("Options");
      optionMenu.setMnemonic('O');
      menuBar.add(optionMenu);
      JCheckBoxMenuItem step = new JCheckBoxMenuItem("Step by Step");
      JCheckBoxMenuItem code = new JCheckBoxMenuItem("Sample Code");  
      step.setEnabled(false);
      code.setEnabled(false);
      optionMenu.add(step);
      optionMenu.add(code);

      JMenu infoMenu = new JMenu("Information");
      infoMenu.setMnemonic('I');
      menuBar.add(infoMenu);
      JMenuItem linkInfo = new JMenuItem("Binary Tree Info.");
      linkInfo.addActionListener(
         new ActionListener()
         {
            public void actionPerformed(ActionEvent e)
            {
               JOptionPane.showMessageDialog(Dsv1.this, llInfo,
               "The Linked List Information Box",
               JOptionPane.INFORMATION_MESSAGE);
            }
         }
      );
      infoMenu.add(linkInfo);

      JMenu aboutMenu = new JMenu("About Demo");
      aboutMenu.setMnemonic('A');
      menuBar.add(aboutMenu);
      JMenuItem aboutItem = new JMenuItem("About DSV");
      aboutItem.addActionListener(
         new ActionListener()
         {
            public void actionPerformed(ActionEvent e)
            {
               JOptionPane.showMessageDialog(Dsv1.this, dsvInfo,
               "Data Structures Visualization (DSV)",
               JOptionPane.INFORMATION_MESSAGE);
            }
         }
      );
      aboutMenu.add(aboutItem);


      clearButton = new JButton("Clear");
      clearButton.setMnemonic('C');
      clearButton.addActionListener(
         new ActionListener()
         {
            public void actionPerformed(ActionEvent e)
            {
               JOptionPane.showMessageDialog(Dsv1.this, "Tree is cleared", "Clear",
               JOptionPane.PLAIN_MESSAGE);
               drawArea.clear();
               Dsv1.this.checkButtons();
            }
         }
      );

      enterButton = new JButton("Add...");
      enterButton.setMnemonic('A');
      enterButton.addActionListener(
         new ActionListener()
         {
            public void actionPerformed(ActionEvent e)
            {
               String value = JOptionPane.showInputDialog(Dsv1.this, "Add Element");
               if(value != null && !value.trim().equals(""))
               {
                  drawArea.addElement(value);
               }
               Dsv1.this.checkButtons();
               doLayout();
            }
         }
      );

      findButton = new JButton("Find...");
      findButton.setMnemonic('F');
      findButton.addActionListener(
         new ActionListener()
         {
            public void actionPerformed(ActionEvent e)
            {
               String value = JOptionPane.showInputDialog(Dsv1.this, 
               "Find Element");
               if(value != null && !value.trim().equals(""))
               {
                  if(drawArea.findElement(value))
                     JOptionPane.showMessageDialog(Dsv1.this, 
                     "Element " + value.trim() + " Found", 
                     "Delete Element",
                     JOptionPane.PLAIN_MESSAGE);
                  else
                     JOptionPane.showMessageDialog(Dsv1.this, 
                     "Element Not Fount ",
                     "Find Element", JOptionPane.PLAIN_MESSAGE);
               }
              
            }
         }
      );
      findButton.setEnabled(false);
       	       	
      deleteButton = new JButton("Delete...");
      deleteButton.setMnemonic('D');
      deleteButton.addActionListener(
         new ActionListener()
         {
            public void actionPerformed(ActionEvent e)
            {
               String value = JOptionPane.showInputDialog(Dsv1.this, 
               "Delete Element");
               if(value != null && !value.trim().equals(""))
               {
                  if(!drawArea.deleteElement(value))
                     JOptionPane.showMessageDialog(Dsv1.this, 
                     "Element Not Fount ",
                     "Delete Element", JOptionPane.PLAIN_MESSAGE);
               }
               Dsv1.this.checkButtons();              
            }
         }
      );
      deleteButton.setEnabled(false);

      subSouthPanel = new JPanel();
      subSouthPanel.setLayout(new FlowLayout());
      subSouthPanel.add(clearButton);
      subSouthPanel.add(enterButton);
      subSouthPanel.add(findButton);
      subSouthPanel.add(deleteButton);

      southPanel.setLayout(new BorderLayout());
      southPanel.add(subSouthPanel, BorderLayout.CENTER);
      southPanel.add(statusLabel, BorderLayout.SOUTH);


      westPanel.add(new JLabel(" "));
      
      eastPanel.setLayout(new GridLayout(10, 1));
      eastPanel.add(new JLabel("Traversals:"));
      eastPanel.add(new JLabel("pre-order:"));
      eastPanel.add(preTextField);
      eastPanel.add(new JLabel("in-order:"));
      eastPanel.add(inTextField);
      eastPanel.add(new JLabel("post-order:"));
      eastPanel.add(postTextField);


      Container myContainer = getContentPane();
      myContainer.setLayout(new BorderLayout());
      myContainer.add(new JScrollPane( drawArea), BorderLayout.CENTER);
      myContainer.add(westPanel, BorderLayout.WEST);
      myContainer.add(southPanel, BorderLayout.SOUTH);
      myContainer.add(eastPanel, BorderLayout.EAST);

      addKeyListener(
         new KeyAdapter()
         {
            public void keyTyped( KeyEvent e )
            {
               String value = "" + e.getKeyChar();
               if(!value.trim().equals(""))
               {
                  drawArea.addElement(value);
                  Dsv1.this.checkButtons();
                  doLayout();
               }
            }
         }
      );

      setSize(width, height);
      setVisible(true);
   }

   public static void main(String args[])
   {
      int width = 620, height = 450;
      if(args.length == 2)
      {
         try
         {
            width = Integer.parseInt(args[0]);
            height = Integer.parseInt(args[1]);
         }
         catch(Exception ex)
         {
            width = 620;
            height = 450;
         }
      }

      JFrame myFrame = new JFrame("Application DSV");
      myFrame.addWindowListener(
         new WindowAdapter()
         {
            public void windowClosing(WindowEvent e)
            {
               System.exit(0);
            }
         }
      );

      Dsv1 appletObject = new Dsv1();
      appletObject.setWidth(width);
      appletObject.setHeight(height);

      appletObject.init(true);
      appletObject.start();

      myFrame.getContentPane().add(appletObject);
      myFrame.setSize(width, height);
      myFrame.setVisible(true);

   }

}