/*
Research Project:   Graphical Database for Category Theory
                    J. Bradbury, Dr. R. Rosebrugh, I. Rutherford
                    Mount Allison University 2001
File:               HelpFrame.java
Description:	      This file is displayed when the user selects the "Help Topics"
                    menu option in the main window. It displays a list  help files
                    that are available in text format(as .DAT files).
*/

//import statements
import java.applet.Applet;
import java.net.*;
import java.io.*;
import java.util.*;
import java.lang.System;
import java.io.StringBufferInputStream;
import java.awt.*;
import java.awt.event.*;

public class HelpFrame extends Frame {

  public String filename = new String();
  int check_enter = 0;
  Button exit = new Button();
  Panel button_panel = new Panel();
  GridBagLayout gridBagLayout1 = new GridBagLayout();
  GBConstraintsEditor g = new GBConstraintsEditor();
  Button exitHelpButton = new Button();
  TextField topic = new TextField();
  InputStream input;
  DataInputStream dataInput;
  Label helpFileLabel = new Label();
  TextArea helpFileDisplay = new TextArea("", 10, 10, TextArea.SCROLLBARS_VERTICAL_ONLY);
  java.awt.List helpFileList = new java.awt.List();

  public HelpFrame()
  {
    try  {
      jbInit();
    }
    catch (Exception e) {
      e.printStackTrace();
    }
  }

 public boolean handleEvent(Event e)
 {
  if ((e.id == Event.WINDOW_DESTROY) || (e.id == Event.ACTION_EVENT))
  {
     setVisible(false);            //hide frame
     dispose();         //free resources
     return true;
  }
  if (e.key == Event.ENTER)
  {
    if (check_enter == 0)
       check_enter++;
    else
    {
       hide();            //hide frame
       dispose();         //free resources
    }
    return true;
  }
  return super.handleEvent(e);
 }

 public boolean action(Event e, Object o)
 {
  if ((e.target == exit) || (e.key == Event.ENTER))
  {
    hide();            //hide frame
    dispose();         //free resources
    return true;
  }
  return false;
 }

  private void jbInit() throws Exception
  {
    this.setTitle("Graphical Database for Category Theory Help Files");
    this.setBackground(new Color(192,192,192));
    this.setSize(new Dimension(588, 511));
    exitHelpButton.setLabel("Exit Help Files");
    helpFileLabel.setFont(new Font("Dialog", 0, 30));
    helpFileLabel.setText("Help Files");
    helpFileDisplay.setBackground(Color.white);
    helpFileDisplay.setEditable(false);
    Font f = new Font("TimesRoman", Font.BOLD,14);
    helpFileDisplay.setFont(f);
    this.setLayout(gridBagLayout1);
    this.add(topic, g.getConstraints(0, 1, 1, 1, 0.0, 0.0
            ,GridBagConstraints.WEST, GridBagConstraints.HORIZONTAL, new Insets(10, 11, 0, 0), 47, 3));
    this.add(exitHelpButton, g.getConstraints(0, 3, 1, 2, 0.0, 0.0
            ,GridBagConstraints.CENTER, GridBagConstraints.NONE, new Insets(7, 11, 5, 0), 79, 3));
    this.add(helpFileLabel, g.getConstraints(0, 0, 1, 1, 0.0, 0.0
            ,GridBagConstraints.WEST, GridBagConstraints.NONE, new Insets(14, 11, 0, 0), 0, 0));
    this.add(helpFileDisplay, g.getConstraints(1, 0, 1, 4, 1.0, 2.0
            ,GridBagConstraints.SOUTH, GridBagConstraints.BOTH, new Insets(14, 29, 0, 13), 312, 289));
    this.add(helpFileList, g.getConstraints(0, 2, 1, 1, 0.0, 1.0
            ,GridBagConstraints.CENTER, GridBagConstraints.BOTH, new Insets(8, 11, 0, 0), 47, 283));
    helpFileList.addActionListener(new java.awt.event.ActionListener() {
      public void actionPerformed(ActionEvent e) {
        helpFileList_actionPerformed(e);
      }
    });
    topic.addKeyListener(new java.awt.event.KeyListener()
    {
      public void keyTyped(KeyEvent e)
      {
        //topic_actionPerformed(e);
      }
      public void keyReleased(KeyEvent e)
      {
        topic_actionPerformed(e);
      }
      public void keyPressed(KeyEvent e)
      {
        //topic_actionPerformed(e);
      }
    });      createList();
    helpFileList.select(0);
    helpFileDisplay.setText(readFile("help\\about.dat"));
    topic.setText("About");
    topic.select(0, topic.getText().length());
    topic.requestFocus();

  }

  void topic_actionPerformed(KeyEvent e)
  {
    String temp = topic.getText();
    boolean found = false;

    for (int i=0; i < helpFileList.getItemCount(); i++)
    {
      if (helpFileList.getItem(i).startsWith(temp) && found == false)
      {
        helpFileList.select(i);
        found = true;
      }
    }
  }

   void helpFileList_actionPerformed(ActionEvent e)
   //This function is called if an item from the help file
   //list is selected
   {
      if (helpFileList.getSelectedItem().equals("About"))
        helpFileDisplay.setText(readFile("help\\about.dat"));
      else if (helpFileList.getSelectedItem().equals("Add Data"))
        helpFileDisplay.setText(readFile("help\\adddata.dat"));
      else if (helpFileList.getSelectedItem().equals("Change Category Name"))
        helpFileDisplay.setText(readFile("help\\chcname.dat"));
      else if (helpFileList.getSelectedItem().equals("Coequalizer Tool"))
        helpFileDisplay.setText(readFile("help\\coeq.dat"));
      else if (helpFileList.getSelectedItem().equals("Creating Categories"))
        helpFileDisplay.setText(readFile("help\\ccreate.dat"));
      else if (helpFileList.getSelectedItem().equals("Creating Functors"))
        helpFileDisplay.setText(readFile("help\\fcreate.dat"));
      else if (helpFileList.getSelectedItem().equals("Downloading Categories"))
        helpFileDisplay.setText(readFile("help\\catload.dat"));
      else if (helpFileList.getSelectedItem().equals("Downloading Functors"))
        helpFileDisplay.setText(readFile("help\\funload.dat"));
      else if (helpFileList.getSelectedItem().equals("Epimorphism Tool"))
        helpFileDisplay.setText(readFile("help\\epi.dat"));
      else if (helpFileList.getSelectedItem().equals("Equality of Composites"))
        helpFileDisplay.setText(readFile("help\\eqcomp.dat"));
      else if (helpFileList.getSelectedItem().equals("Equalizer Tool"))
        helpFileDisplay.setText(readFile("help\\eq.dat"));
      else if (helpFileList.getSelectedItem().equals("File Format, CAT"))
        helpFileDisplay.setText(readFile("help\\catform.dat"));
      else if (helpFileList.getSelectedItem().equals("File Format, CGL"))
        helpFileDisplay.setText(readFile("help\\cglform.dat"));
      else if (helpFileList.getSelectedItem().equals("File Format, FUN"))
        helpFileDisplay.setText(readFile("help\\funform.dat"));
      else if (helpFileList.getSelectedItem().equals("File Format, FGL"))
        helpFileDisplay.setText(readFile("help\\fglform.dat"));
      else if (helpFileList.getSelectedItem().equals("File Types, Categories"))
        helpFileDisplay.setText(readFile("help\\catfiles.dat"));
      else if (helpFileList.getSelectedItem().equals("File Types, Functors"))
        helpFileDisplay.setText(readFile("help\\funfiles.dat"));
      else if (helpFileList.getSelectedItem().equals("Functor Animation"))
        helpFileDisplay.setText(readFile("help\\funcanim.dat"));
      else if (helpFileList.getSelectedItem().equals("Graphical Display"))
        helpFileDisplay.setText(readFile("help\\graphdis.dat"));
      else if (helpFileList.getSelectedItem().equals("Initial Object Tool"))
        helpFileDisplay.setText(readFile("help\\initobj.dat"));
      else if (helpFileList.getSelectedItem().equals("Isomorphism Tool"))
        helpFileDisplay.setText(readFile("help\\iso.dat"));
      else if (helpFileList.getSelectedItem().equals("Make Confluent"))
        helpFileDisplay.setText(readFile("help\\makeconf.dat"));
      else if (helpFileList.getSelectedItem().equals("Make Dual Category"))
        helpFileDisplay.setText(readFile("help\\makedual.dat"));
      else if (helpFileList.getSelectedItem().equals("Menu Item Shortcuts"))
        helpFileDisplay.setText(readFile("help\\shortcut.dat"));
      else if (helpFileList.getSelectedItem().equals("Monomorphism Tool"))
        helpFileDisplay.setText(readFile("help\\mono.dat"));
      else if (helpFileList.getSelectedItem().equals("Opening Categories"))
        helpFileDisplay.setText(readFile("help\\catopen.dat"));
      else if (helpFileList.getSelectedItem().equals("Opening Functors"))
        helpFileDisplay.setText(readFile("help\\funopen.dat"));
      else if (helpFileList.getSelectedItem().equals("Print"))
        helpFileDisplay.setText(readFile("help\\print.dat"));
      else if (helpFileList.getSelectedItem().equals("Product Tool"))
        helpFileDisplay.setText(readFile("help\\product.dat"));
      else if (helpFileList.getSelectedItem().equals("Removing Data"))
        helpFileDisplay.setText(readFile("help\\remdata.dat"));
      else if (helpFileList.getSelectedItem().equals("Saving Categories"))
        helpFileDisplay.setText(readFile("help\\savecat.dat"));
      else if (helpFileList.getSelectedItem().equals("Saving Functors"))
        helpFileDisplay.setText(readFile("help\\savefun.dat"));
      else if (helpFileList.getSelectedItem().equals("Settings"))
        helpFileDisplay.setText(readFile("help\\settings.dat"));
      else if (helpFileList.getSelectedItem().equals("Sum Tool"))
        helpFileDisplay.setText(readFile("help\\sum.dat"));
      else if (helpFileList.getSelectedItem().equals("Terminal Object Tool"))
        helpFileDisplay.setText(readFile("help\\termobj.dat"));
      else if (helpFileList.getSelectedItem().equals("View GML"))
        helpFileDisplay.setText(readFile("help\\viewgml.dat"));
      else if (helpFileList.getSelectedItem().equals("Visual Display Controls"))
        helpFileDisplay.setText(readFile("help\\viscontrol.dat"));
      else
        helpFileDisplay.setText("The item you have selected is not available in the current version of Category Theory Database Tools This item will be available in a future application version of CTDT.");

      //Set the cursor to the top of the text area helpFileDisplay
      helpFileDisplay.setCaretPosition(0);
   }

  //Function reads in and displays a help topic from a data file
  String readFile(String filename)
  {
      boolean morelines = true;
      BufferedReader input;
      helpFileDisplay.setText("");
      String helpfile = new String();

      try
      {
        input = new BufferedReader(new InputStreamReader(new FileInputStream(filename)));
        String newline = input.readLine();
        while (!newline.equals("END") && !newline.equals("END\n"))
        {
          try {
            helpfile = helpfile + newline + "\n";
            newline = input.readLine();
          }
          catch(EOFException eof) {
            morelines = false;
          }
        }
        input.close();
      }
      catch (IOException e1) {
        helpFileDisplay.setText("Error: Data File not found!");
      }
      return (helpfile);
  }

  public void createList()
  //Reads list of help files from help file index and outputs it into a list
  //in the help frame
  {
    helpFileList.add("About");
    helpFileList.add("Add Data");
    helpFileList.add("Change Category Name");
    helpFileList.add("Coequalizer Tool");
    helpFileList.add("Creating Categories");
    helpFileList.add("Creating Functors");
    helpFileList.add("Downloading Categories");
    helpFileList.add("Downloading Functors");
    helpFileList.add("Epimorphism Tool");
    helpFileList.add("Equality of Composites");
    helpFileList.add("Equalizer Tool");
    helpFileList.add("File Format, CAT");
    helpFileList.add("File Format, CGL");
    helpFileList.add("File Format, FUN");
    helpFileList.add("File Format, FGL");
    helpFileList.add("File Types, Categories");
    helpFileList.add("File Types, Functors");
    helpFileList.add("Functor Animation");
    helpFileList.add("Graphical Display");
    helpFileList.add("Initial Object Tool");
	helpFileList.add("Isomorphism Tool");
    helpFileList.add("Make Confluent");
    helpFileList.add("Make Dual Category");
    helpFileList.add("Menu Item Shortcuts");
    helpFileList.add("Monomorphism Tool");
    helpFileList.add("Opening Categories");
    helpFileList.add("Opening Functors");
    helpFileList.add("Print");
    helpFileList.add("Product Tool");
    helpFileList.add("Removing Data");
    helpFileList.add("Saving Categories");
    helpFileList.add("Saving Functors");
    helpFileList.add("Settings");
    helpFileList.add("Sum Tool");
    helpFileList.add("Terminal Object Tool");
    helpFileList.add("View GML");
    helpFileList.add("Visual Display Controls");
  }
}