/*
   Chapter 7:  Programming Assignment 2
   Programmer: Brad Shedd
   Date:       July 28, 2006
   Filename:   Music.java
   Purpose:    This program creates a Swing interface for sorting Music.
*/

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


public class Music extends JFrame implements ActionListener
{
   //construct components

   JTextPane textPane = new JTextPane();

   //initialize data in arrays
   String artist[] = {"The Beatles", "Elvis Presley", "Mariah Carey","Michael Jackson"};
   String genre[] = {"Rock", "Rock", "Pop", "R&B"};
   String greatestHit[] = {"Hey Jude", "Don't Be Cruel", "One Sweet Day", "Billie Jean"};
   String recordLabel[] = {"Capitol", "RCA Victor", "Columbia", "Epic"};



   //construct instance of Music
   public Music()
   {
      super("Music");
   }

   //create the menu system
   public JMenuBar createMenuBar()
   {
      //create an instance of the menu
      JMenuBar mnuBar = new JMenuBar();
      setJMenuBar(mnuBar);

      //construct and populate the File menu
      JMenu mnuFile = new JMenu ("File", true);
         mnuFile.setMnemonic(KeyEvent.VK_F);
         mnuFile.setDisplayedMnemonicIndex(0);
         mnuBar.add(mnuFile);

      JMenuItem mnuFileExit = new JMenuItem ("Exit");
         mnuFileExit.setMnemonic(KeyEvent.VK_X);
         mnuFileExit.setDisplayedMnemonicIndex(1);
         mnuFile.add(mnuFileExit);
         mnuFileExit.setActionCommand("Exit");
         mnuFileExit.addActionListener(this);

      //construct and populate the Edit menu
      JMenu mnuEdit = new JMenu ("Edit", true);
         mnuEdit.setMnemonic(KeyEvent.VK_E);
         mnuEdit.setDisplayedMnemonicIndex(0);
         mnuBar.add(mnuEdit);

      JMenuItem mnuEditInsert = new JMenuItem ("Insert New DVD");
         mnuEditInsert.setMnemonic(KeyEvent.VK_I);
         mnuEditInsert.setDisplayedMnemonicIndex(0);
         mnuEdit.add(mnuEditInsert);
         mnuEditInsert.setActionCommand("Insert");
         mnuEditInsert.addActionListener(this);

      JMenu mnuEditSort = new JMenu ("Sort", true);
         mnuEditSort.setMnemonic(KeyEvent.VK_R);
         mnuEditSort.setDisplayedMnemonicIndex(3);
         mnuEdit.add(mnuEditSort);

      JMenuItem mnuEditSortByArtist = new JMenuItem ("by Artist");
         mnuEditSortByArtist.setMnemonic(KeyEvent.VK_A);
         mnuEditSortByArtist.setDisplayedMnemonicIndex(3);
         mnuEditSort.add(mnuEditSortByArtist);
         mnuEditSortByArtist.setActionCommand("artists");
         mnuEditSortByArtist.addActionListener(this);

      JMenuItem mnuEditSortByGenre = new JMenuItem ("by Genre");
         mnuEditSortByGenre.setMnemonic(KeyEvent.VK_G);
         mnuEditSortByGenre.setDisplayedMnemonicIndex(3);
         mnuEditSort.add(mnuEditSortByGenre);
         mnuEditSortByGenre.setActionCommand("genre");
         mnuEditSortByGenre.addActionListener(this);

      JMenuItem mnuEditSortByGreatestHits = new JMenuItem ("by Greatest Hit");
         mnuEditSortByGreatestHits.setMnemonic(KeyEvent.VK_H);
         mnuEditSortByGreatestHits.setDisplayedMnemonicIndex(3);
         mnuEditSort.add(mnuEditSortByGreatestHits);
         mnuEditSortByGreatestHits.setActionCommand("greatest hits");
         mnuEditSortByGreatestHits.addActionListener(this);

      JMenuItem mnuEditSortByRecordLabel = new JMenuItem ("by Record Label");
         mnuEditSortByRecordLabel.setMnemonic(KeyEvent.VK_R);
         mnuEditSortByRecordLabel.setDisplayedMnemonicIndex(3);
         mnuEditSort.add(mnuEditSortByRecordLabel);
         mnuEditSortByRecordLabel.setActionCommand("record label");
         mnuEditSortByRecordLabel.addActionListener(this);

      return mnuBar;
   }

   //create the content pane
   public Container createContentPane()
   {

      //create the JTextPane and center panel
      JPanel centerPanel = new JPanel();
      setTabsAndStyles(textPane);
      textPane = addTextToTextPane();
      JScrollPane scrollPane = new JScrollPane(textPane);
         scrollPane.setVerticalScrollBarPolicy(JScrollPane.VERTICAL_SCROLLBAR_ALWAYS);
         scrollPane.setPreferredSize(new Dimension(700, 400));
      centerPanel.add(scrollPane);

      //create Container and set attributes
      Container c = getContentPane();
         c.setLayout(new BorderLayout(10, 10));
         c.add(centerPanel, BorderLayout.CENTER);

      return c;
   }

   //method to create tab stops and set font styles
   protected void setTabsAndStyles(JTextPane textPane)
   {
      //create Tab Stops
      TabStop[] tabs = new TabStop[3];
         tabs[0] = new TabStop(250, TabStop.ALIGN_LEFT, TabStop.LEAD_NONE);
         tabs[1] = new TabStop(350, TabStop.ALIGN_LEFT, TabStop.LEAD_NONE);
         tabs[2] = new TabStop(550, TabStop.ALIGN_LEFT, TabStop.LEAD_NONE);
      TabSet tabset = new TabSet(tabs);

      //set Tab Style
      StyleContext tabStyle = StyleContext.getDefaultStyleContext();
      AttributeSet aset =
         tabStyle.addAttribute(SimpleAttributeSet.EMPTY, StyleConstants.TabSet, tabset);
      textPane.setParagraphAttributes(aset, false);

      //set Font Style
      Style fontStyle =
         StyleContext.getDefaultStyleContext().getStyle(StyleContext.DEFAULT_STYLE);

      Style regular = textPane.addStyle("regular", fontStyle);
      StyleConstants.setFontFamily(fontStyle, "SansSerif");

      Style s = textPane.addStyle("italic", regular);
      StyleConstants.setItalic(s, true);

      s = textPane.addStyle("bold", regular);
      StyleConstants.setBold(s, true);

      s = textPane.addStyle("large", regular);
      StyleConstants.setFontSize(s, 16);
   }

   //method to add new text to the JTextPane
   public JTextPane addTextToTextPane()
   {
      Document doc = textPane.getDocument();
      try
      {
         //clear previous text
         doc.remove(0, doc.getLength());

         //insert title
         doc.insertString(0, "ARTIST\tGENRE\tGREATEST HIT\tRECORD LABEL\n",textPane.getStyle("large"));

         //insert detail
         for (int j = 0; j<artist.length; j++)
         {
            doc.insertString(doc.getLength(), artist[j] + "\t",
            textPane.getStyle("bold"));
            doc.insertString(doc.getLength(), genre[j] + "\t", textPane.getStyle(
               "italic"));
            doc.insertString(doc.getLength(), greatestHit[j] + "\t",
            textPane.getStyle("regular"));
            doc.insertString(doc.getLength(), recordLabel[j] + "\n",
            textPane.getStyle("regular"));

         }
      }
      catch (BadLocationException ble)
      {
         System.err.println("Couldn't insert text.");
      }
      return textPane;
   }

   //event to process user clicks
   public void actionPerformed(ActionEvent e)
   {
      String arg = e.getActionCommand();

      //user clicks Exit on the File menu
      if(arg == "Exit")
         System.exit(0);

         //user clicks Insert New DVD on the Edit menu
         if (arg == "Insert")
         {
            //accept new data
            String newArtist = JOptionPane.showInputDialog(null, "Please enter the artists");
            String newGenre = JOptionPane.showInputDialog(null, "Please enter the genre");
            String newGreatestHit = JOptionPane.showInputDialog(null, "Please enter the greatest hits");
           String newRecordLabel = JOptionPane.showInputDialog(null, "Please enter the record label");

            //enlarge arrays
            artist = enlargeArray(artist);
            genre = enlargeArray(genre);
            greatestHit = enlargeArray(greatestHit);
            recordLabel = enlargeArray(recordLabel);

            //add new data to arrays
            artist[artist.length-1] = newArtist;
            genre[genre.length-1] = newGenre;
            greatestHit[greatestHit.length-1] = newGreatestHit;
            recordLabel[recordLabel.length-1] = newRecordLabel;

            //call sort method
            sort(artist);
         }


         //user clicks Artists on the Search submenu
         if(arg == "artist")
            sort(artist);

         //user clicks Genre on the Search submenu
         if(arg == "genre")
            sort(genre);

         //user clicks Greatest Hits on the Search submenu
         if (arg == "greatestHits")
            sort(greatestHit);

         //user clicks Record Label on the Search submenu
         if (arg == "recordLabel")
            sort(recordLabel);
          }

            //method to enlarge an array by 1
            public String[] enlargeArray(String[] currentArray)
            {
               String[] newArray = new String[currentArray.length + 1];
               for(int i = 0; i<currentArray.length; i++)
                  newArray[i] = currentArray[i];
               return newArray;
            }

            //method to sort arrays
            public void sort(String tempArray[])
            {
               //loop to control number of passes
               for (int pass = 1; pass < tempArray.length; pass++)
               {
                  for (int element = 0; element<tempArray.length - 1; element ++)

                     if (tempArray[element].compareTo(tempArray[element +1])>0)
                     {
                        swap(artist, element, element + 1);
                        swap(genre, element, element + 1);
                        swap(greatestHit, element, element + 1);
                        swap(recordLabel, element, element + 1);

                     }
                }
                addTextToTextPane();
              }

              //method to swap two elements of an array
              public void swap(String swapArray[], int first, int second)
              {
               String hold; //temporary holding area for swap
               hold = swapArray[first];
              swapArray[first] = swapArray[second];
               swapArray[second] = hold;
              }

              public void search(String searchField, String searchArray[])
              {
               try
               {
                  Document doc = textPane.getDocument(); // assign text to document object
                  doc.remove(0,doc.getLength()); //clear previous text

                  //display column titles
                  doc.insertString(0,"ARTIST\tGENRE\tGREATEST_HIT\tRECORD_LABEL\n",textPane.getStyle("large"));

                  //prompt user for search data
                  String search = JOptionPane.showInputDialog(null, "Please enter the "+ searchField);
                  boolean found = false;

                  //search arrays
                  for (int i = 0; i<artist.length; i++)
                  {
                     if (search.compareTo(searchArray[i])==0)
                     {
                        doc.insertString(doc.getLength(), artist[i] + "\t", textPane.getStyle("bold"));
                        doc.insertString(doc.getLength(), genre[i] + "\t", textPane.getStyle("italic"));
                        doc.insertString(doc.getLength(), greatestHit[i] + "\t", textPane.getStyle("regular"));
                        doc.insertString(doc.getLength(), recordLabel[i] + "\t", textPane.getStyle("regular"));
                        found = true;
                     }
                  }
                  if (found == false)
                  {
                     JOptionPane.showMessageDialog(null, "Your search produced no results.", "No results found",JOptionPane.INFORMATION_MESSAGE);
                     sort(artist);
                  }
               }
               catch (BadLocationException ble)
               {
                  System.err.println("Couldn't insert text.");
               }
             }

             //main method executes at run time
             public static void main(String args[])
             {
               JFrame.setDefaultLookAndFeelDecorated(true);
               Music f = new Music();
               f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
               f.setJMenuBar(f.createMenuBar());
               f.setContentPane(f.createContentPane());
               f.setSize(800,475);
               f.setVisible(true);
             }
   }

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