// ConceptWebClient.java - a web applet for the development of concept maps

// A concept map drawing applet.  Scott Harrison 2001-2007

// Scott Harrison, harris41@msu.edu
// Project investigators: Douglas Luckie, Diane Ebert-May
// Copyright 2001-2007 Michigan State University Board of Trustees

// =============================================================== INSTALLATION
//
// ConceptWebClient can be installed with the rest of
// the C-TOOLS software package.  For information, see
// sourcetreepath/build/README
// cd sourcetreepath/build; aap install-javaclient
//
// The ConceptWebClient also supports a standalone mode, and the
// web page code in ctoolsapplet.html demonstrates basic deployment of
// the applet.

// ================================================================ COMPILATION
// For purposes of browser compatibility, JDK 1.3 (from Sun) is recommended.
// javac ConceptWebClient.java

// ==================================================================== LICENSE
//
// This software is eventually to be released under the General
// Public License, Version 2, June 1991.  (It will be released
// when there is a "Gold Master" version ready.)
//
// Until then, if you would like to use this software, you should
// contact Dr. Douglas Luckie, luckie@msu.edu.
//
// Development of this software was funded by the National Science Foundation.
//
// Copyright 2001-2007 Michigan State University Board of Trustees

// ================================================================ DESCRIPTION
// This code allows students in a classroom setting to generate concept maps.
// Instructors are given significant flexibility for the modification of
// concept map assignments and exercises that are delivered through this
// software.  Instructors can choose to enable or disable certain features
// of this applet, which is key for having this tool run in standalone mode
// versus integration with a courseware management system (like moodle).
// Instructors can also choose to define the concept
// map that students first begin to work with.  For instance, an instructor
// might want the students to all start with three major concepts already
// present on a concept map.
//
// This is a "web client"; it is a java applet that is meant to run on a wide
// variety of browsers.
//
// Concept maps are made of "concept words", "linking words", and "links".
// For C-TOOLS, the term "words" is inclusive of both "concept words" and
// "linking words".  Also, the term "concept word" is meant to be identical
// to the notion of a "concept phrase".  Thus, "Pizza Hut" is considered
// to be a concept word (for the variable names inside this source code).

// ============================================================ DEVELOPER NOTES
// Also, for reasons of browser and compiler compatibility (JDK1.3)
// the goal with this code has been to keep the objects, processing,
// interface layout, and event handling simple so as to ensure robustness
// across diverse operating systems and browsers (e.g., a set
// of remotely connecting students).  Additional considerations
// include promoting a common look and feel (something which differing AWT or
// Swing implementations can interfere with).  Also, I want things to be
// kept "mobile" in the sense that the software can be modestly extended
// and enhanced in most any direction for special needs (without assuming
// in advance what those special user needs might be).  The overall goal of
// this technology is not "a huge extensible basket of concept mapping
// features", but rather "a common browser-compatible billboard" for getting
// started with concept mapping in a classroom setting that can be configured
// to work in many different institutional scenarios.  So, for the brave few
// who look at this code, prior to contorting its simplicity, please
// take time to consider that there may be reasons (and benefits) as
// to why the softwawre is structured the way it is.
//
// That said, the "VIEW" menu is being currently prototyped, and this
// is distorting the class structure a bit (BubbleMenuHelp, SubOption, etc).
//
// Also, Safari with JDK 1.4.1 is quite buggy and does not always read in the
// parameters correctly (i.e., getParameter).  Therefore, after a getParameter
// is called, I need to check if it is null, and if so, do additional logic
// such as assigning a default value or sending a retry (rtry) request
// to the server.

// =========================================================== ACKNOWLEDGEMENTS
// The applet code emerged at Michigan State University (MSU) supported in
// large part by an NSF funded grant project.  I would like to thank the
// following for helpful comments and contributions to help guide the
// ultimate outcome of this applet:
// Douglas Luckie, Diane Ebert-May, Janet Batzli, Duncan Sibley, Rett Weber,
// Joshua Wallace, Crystal Tobin, students of MSU's Lyman Briggs School as
// well as the variety of java applet coding tutorials and examples that
// other software developers have made publicly available over the internet.

// =============================================================== JAVA CLASSES
//      ConceptWebClient
//      |
//      |   +------- ConceptWebClient.class : main class for the web client
//      |   +------- MoveableWord.class : implement the "magnetic rectangle"
//      |                                 concept which can be dragged around
//      |   +------- Link.class : ordered pair structure by which one
//      |                         concept is attached to another concept
//      |   +------- MenuButton.class : a menu button that can be clicked on;
//      |                               menu buttons appear on the left side of
//      |                               the applet
//      |   +------- BubbleMenuHelp.class : shows list of actions (SubOptions)
//      |                                   whenever a menu button is pressed;
//      |                                   brief help text is displayed for
//      |                                   each SubOption
//      |   +------- SubOption.class : a choice that is available after a
//      |                              menu button is pressed; usually
//      |                              there are multiple SubOptions associated
//      |                              with each menu button
//      |   +------- Message.class : brief help messages which are displayed;
//      |                            especially in concert with SubOptions
//      |                            which are selected
//      |   +------- StatusMessage.class : status of concept map; SAVED, NOT
//      |                                  SAVED, or AUTOSAVED
//      |   +------- TargetArea.class : a set of coordinates
//      |                               defining a target area (used to
//      |                               interactively respond to events
//      |                               on the user interface)
//      |   +------- ServerTalker.class : support capability to talk to server

// ========================================================= NECESSARY PACKAGES
import java.applet.*;
import java.awt.*;
import java.awt.event.*;
import java.util.Vector;
import java.util.Enumeration;
import java.net.*;
import java.io.*;


/** 
 * The GeneralThread class is the main background process for the applet.
 * It was developed to support autosaving off of the applet.
 * Its usage is presently disabled however since a variety of browsers and
 * applet runtime environments seem to crash or be unstable with autonomous
 * processes.
 */
class GeneralThread extends Thread
  {
    AppletContext ac;
    URL url;
    String mapname;
    String expiration_key;
    String sid;
    MoveableWord words[];
    Link links[];
    int number_words;
    int number_links;
    String disable_string;
    String gallery;
    ServerTalker server_talker;
    Graphics g;
    String teststring;

    /**
     * Constructor.  Set the parameters for running the background autosaving
     * thread.
     * (Parameters not yet listed.)
     */
    GeneralThread(URL u, AppletContext a,
		  MoveableWord[] w, Link[] l,
		  int num_w, int num_l,
		  ServerTalker st, Graphics graphics,
		  String ekey)
      {
	url = u;
	ac = a;
	words = w;
	links = l;
	number_words = num_w;
	number_links = num_l;
	server_talker = st;
	g = graphics;
	expiration_key = ekey;
      }
    // END GeneralThread constructor

    /**
     * Run the thread.  (Turns on every 20 seconds.)
     */
    public void run()
      {
	while (true)
	  {
	    try {sleep(20000);} catch (Exception e) {}

	    //	    System.out.println("TESTSTR: "+teststring);

	    String data = new String();
	    String winfo = new String();

	    data += "command=AUTOSAVE&";
	    for (int j = 0; j < number_links; j++)
	      {
		data += "c"+j+"="+
		    links[j].getIndex1()+"+"+
		    links[j].getIndex2()+"&";
	      }
	    for (int i = number_words - 1; i >= 0; i--)
	      {
		if (words[i].word_type.equals("LINKINGWORD"))
		  {
		    winfo = words[i].info(g)+"+n";
		  }
		else
		  {
		    winfo = words[i].info(g) + "+w";
		  }
			    data += "w" + i + "=" + winfo + "&";
			  }
			if (disable_string != null)
			  {
			    data += "DISABLE="+disable_string;
			  }
			if (disable_string != null && gallery != null)
			  {
			    data += "&gallery="+gallery;
			  }

			// Authentication data for the CGI/Servlet.
			data += "&mapname="+mapname;
			data += "&expiration_key="+expiration_key;
			data += "&sid="+sid; // Cannot trust cookie data to
			                     // be available from applet.

			// CGI/Servlet uniform resource locator
			// is the url variable already manifest for this
			// thread.

			server_talker.put(url,data);

			// The "official" url connection object.
			// If the user tries to save an applet outside
			// of user authentication, the page needs to
			// be reloaded (and the CGI servlet layer
			// subsequently takes the user through a
			// login or registration process prior to
			// the save procedure).
			if (expiration_key.equals("NA"))
			  {
			      // ac.showDocument(url);
			  }
	  }
      }
  }
// END GeneralThread

/**
 * The ConceptWebClient class is the main class for the web client.
 * It presents a concept map drawing tool similar in functionality
 * to Dia, Visio (tm) or other schematic tools.  The feature set
 * implemented by this class is not as exhaustive as standard schematic
 * tools; rather, it is limited to those features necessary to draw
 * a concept map generally involving ten words or less.  This reduces
 * the size of the applet so as to be realistic in terms of network
 * bandwidth as well as simplifying users' ability to understand
 * and work with the applet interface.
 * </p><p>
 * <strong>Technical Notes</strong></p>
 * <ul>
 * <li>This code currently conforms to the API for java version 1.3.
 * </li>
 * <li>Browser compatibility has required that much of the interface be
 *  encoded with exact pixel sizes as opposed to a flexibly-sized layout
 *  strategy.</li>
 * <li>Exact pixel sizes also help track mouse actions on the graphical palette
 *  given the weak browser java support for AWT objects and events.</li>
 * </li>
 * </ul>
 *<pre>
 *Description of pixel-based, graphical layout:
 *          <----------- applet_width ----------->
 *       
 *       ^   ------------------------------------
 *       |  |    ^                        ^      |
 *       |  |    |         top_space      |      |
 *       a  |    V                        V      |
 *       p  |------------------------------------|
 *       p  |<->|<------- space_width ------>|<->|
 *       l  | l |      ^                     | r |
 *       e  | e |      |                     | g |
 *       t  | f | space_height               | h |
 *       _  | t |      |                     | t |
 *       h  | s |      |                     | s |
 *       e  | p |      |                     | p |
 *       i  | a |      |                     | a |
 *       g  | c |      |                     | c |
 *       h  | e |      V                     | e |
 *       t  |------------------------------------|
 *       |  |    ^                        ^      |
 *       |  |    |       bottom_space     |      |
 *       |  |    V                        V      |
 *       V   ------------------------------------
 *</pre>
 * @author  Programmer: Scott Harrison, 2001-2007, harris41@msu.edu;
 *          Project investigators: Douglas Luckie, Diane Ebert-May;
 *          Copyright 2001-2007 Michigan State University Board of Trustees
 * @since JDK 1.3.1
 */
public class ConceptWebClient extends Applet
    implements MouseListener, MouseMotionListener, ActionListener
  {
  // --------------------------------------------------------- Class variables.
    private static int rtry;

    /** The object which talks to the server. */
    private static ServerTalker server_talker;

    /** The robo object helps scribble suggestions on top
     *  of a concept map. */
    private static Robograde robo;

    // A number of configuration settings occur in this section, but
    // many other configuration settings also occur inside the "init" method
    // of this class.

    /** The DocumentBase for this applet (because getDocumentBase causes
     *  security exceptions, we must have it passed as a parameter). */
    private static String document_base; 

    /** The expiration key for this applet.  The servlet must know that the
     *  applet session is not bogus. */
    private static String expiration_key; 

    /** The session id for this applet (and the surrounding web pages).
     *  (Not every browser/OS passes on cookie data from the applet.) */
    private static String sid; 

    /** The mapname for this concept map.  (The suffix .cmap should not be
     *  included.) */
    private static String mapname;

    // The text entry feature consists of a text box and a submit button.
    // This feature allows users to add new concepts and linking words to
    // the developing concept map.

    /** Text entry box for specifying concept and linking words. */
    private static TextField text_entry_box;
    /** "Null" text to be on submit button. */
    private static String text_entry_null_submit_label;

    /** Both color mode and black-and-white mode are supported.
     *  The web client will start by running in color mode (this
     *  value is initially set to true). */
    private static boolean color = true;

    /** A value to control how many screen redraws occur.
     *  (Allows for animated drawing during stages of saving. */
    private static boolean mode_cycle = false;

    // There are different events which influence the web client's
    // state of operation.

    /** Status flag for the mouse button. */
    private static boolean mousedown = false;

    /** Flag to indicate if a word was selected. */
    private static boolean selected_word = false;

    /** Flag to indicate if an image was selected. */
    private static boolean selected_image = false;

    // Tracking, guiding, and controlling user activity is done with the mode,
    // submode, and event_counter variables.

    /** Tracks the selection of a menu button;
     *  e.g. MOVE, ADD, DELETE, VIEW, SAVE, and GRADE. */
    private static String mode;

    /** Tracks the selection of a menu button's suboptions.
     *  e.g. ADD_CONCEPT, ADD_LINKINGWORD; or 
     *       DELETE_WORD, DELETE_LINES. */
    private static String submode;

    /** Event counter: when a mode and submode are
     *  activated from the navigation menu, the user is
     *  guided through a series of steps through which to
     *  complete the task.  The series of steps is counted
     *  by the event_counter variable. */
    private static int event_counter = 1;

    // **** Applet and drawing space dimensions ****
    // (These should match the HTML code <applet> tags.)

    // Defined in exact pixel units to improve appearance on a large variety
    // of browsers.

    /** Helpful instructions to user are shown here. */
    private static final int top_space = 25;
    /** The software description is here. */
    private static final int bottom_space = 25;
    /** Padding on the right side of the applet. */
    private static final int right_space = 0;
    /** The menu buttons are placed here. */
    private static final int left_space = 70;
    /** The width of the concept map canvas. */
      //    private static final int space_width = 480;
    private static int space_width = 768;
    /** The height of the concept map canvas. */
      //    private static final int space_height = 300;
    private static int space_height = 480;
    /** Font size. */
    private static int font_size = 10;
    /** The width of the bubble menu. */
    private static final int bubble_width = 400;

    /** The width of the entire applet. */
    private static int applet_width =
	left_space+space_width+right_space;

    /** The height of the entire applet. */
    private static int applet_height =
	top_space+space_height+bottom_space;

    /** Standard icon width. */
    private static final int image_width = 100;
    private static final int image_height = 100;
    private static int image_x = 60+left_space;
    private static int image_y = 40+top_space;
    private Image image_icon1 = null;

    // Color values and color variables.
    /** Major background color in colormode, RGB value. */
    private static final int background_color = 0x336699;
    /** Major background color object, colormode. */
    private static Color Background_Color;
    /** Major background color in graymode, RGB value. */
    private static final int background_gray = 0xFFFFFF;
    /** Major background color object, graymode. */
    private static Color Background_Gray;

    /** Footer foreground color in colormode, RGB value. */
    private static final int footer_fg_color = 0x336699;
    /** Footer foreground color object, colormode. */
    private static Color Footer_Fg_Color;
    /** Footer foreground color in graymode, RGB value. */
    private static final int footer_fg_gray = 0x000000;
    /** Footer foreground color object, graymode. */
    private static Color Footer_Fg_Gray;

    /** Foreground color, RGB value, of "incorrect" scribbling, colormode. */
    private static final int incorrect_fg_color = Color.red.getRGB();
    /** Foreground color, color object, of "incorrect" scribbling,colormode. */
    private static Color Incorrect_Fg_Color;
    /** Foreground color, RGB value, of "incorrect" scribbling, graymode. */
    private static final int incorrect_fg_gray = Color.black.getRGB();
    /** Foreground color, color object, of "incorrect" scribbling, graymode. */
    private static Color Incorrect_Fg_Gray;

    /** Foreground color, RGB value, of "neutral" scribbling, colormode. */
    private static final int neutral_fg_color = Color.yellow.getRGB();
    /** Foreground color, color object, of "neutral" scribbling,colormode. */
    private static Color Neutral_Fg_Color;
    /** Foreground color, RGB value, of "neutral" scribbling, graymode. */
    private static final int neutral_fg_gray = Color.black.getRGB();
    /** Foreground color, color object, of "neutral" scribbling, graymode. */
    private static Color Neutral_Fg_Gray;

    /** Foreground color, RGB value, of "correct" scribbling, colormode. */
    private static final int correct_fg_color = Color.green.getRGB();
    /** Foreground color, color object, of "correct" scribbling,colormode. */
    private static Color Correct_Fg_Color;
    /** Foreground color, RGB value, of "correct" scribbling, graymode. */
    private static final int correct_fg_gray = Color.black.getRGB();
    /** Foreground color, color object, of "correct" scribbling, graymode. */
    private static Color Correct_Fg_Gray;

    /** Background color (colormode) of concept words, RGB value. */
    private static final int conceptword_bg_color = 0xFF9933;
    /** Background color (colormode) of concept words, color object. */
    private static Color Conceptword_Bg_Color;
    /** Foreground color (colormode) of concept words, RGB value. */
    private static final int conceptword_fg_color = 0x000000;
    /** Foreground color (colormode) of concept words, color object. */
    private static Color Conceptword_Fg_Color;
    /** Background color (graymode) of concept words, RGB value. */
    private static final int conceptword_bg_gray = Color.lightGray.getRGB();
    /** Background color (graymode) of concept words, color object. */
    private static Color Conceptword_Bg_Gray;
    /** Foreground color (graymode) of concept words, RGB value. */
    private static final int conceptword_fg_gray = 0x000000;
    /** Foreground color (graymode) of concept words, color object. */
    private static Color Conceptword_Fg_Gray;
    /** Foreground color (graymode) of concept word border, RGB value. */
    private static final int conceptword_fg_brd_gray = 0x000000;
    /** Foreground color (graymode) of concept word border, color object. */
    private static Color Conceptword_Fg_Brd_Gray;

    /** Background color (colormode) of linking words, RGB value. */
    private static final int linkingword_bg_color = 0xFFFFCC;
    /** Background color (colormode) of linking words, color object. */
    private static Color Linkingword_Bg_Color;
    /** Foreground color (colormode) of linking words, RGB value. */
    private static final int linkingword_fg_color = 0x000000;
    /** Foreground color (colormode) of linking words, color object. */
    private static Color Linkingword_Fg_Color;
    /** Background color (graymode) of linking words, RGB value. */
    private static final int linkingword_bg_gray = 0xFFFFFF;
    /** Background color (graymode) of linking words, color object. */
    private static Color Linkingword_Bg_Gray;
    /** Foreground color (graymode) of linking words, RGB value. */
    private static final int linkingword_fg_gray = 0x000000;
    /** Foreground color (graymode) of linking words, color object. */
    private static Color Linkingword_Fg_Gray;
    /** Foreground color (graymode) of linking word border, RGB value. */
    private static final int linkingword_fg_brd_gray = 0x000000;
    /** Foreground color (graymode) of linking word border, color object. */
    private static Color Linkingword_Fg_Brd_Gray;

    /** Foreground color (colormode) of link, RGB value. */
    private static final int link_fg_color = 0xFFFFFF;
    /** Foreground color (colormode) of link, color object. */
    private static Color Link_Fg_Color;
    /** Foreground color (graymode) of link, RGB value. */
    private static final int link_fg_gray = 0x000000;
    /** Foreground color (graymode) of link, color object. */
    private static Color Link_Fg_Gray;

    /** Foreground color (colormode) of link, RGB value. */
    private static final int link_targetbox_fg_color = Color.pink.getRGB();
    /** Foreground color (colormode) of link, color object. */
    private static Color Link_Targetbox_Fg_Color;
    /** Foreground color (graymode) of link, RGB value. */
    private static final int link_targetbox_fg_gray = Color.black.getRGB();
    /** Foreground color (graymode) of link, color object. */
    private static Color Link_Targetbox_Fg_Gray;

    /** Background color (colormode) of buttons, RGB value. */
    private static final int button_bg_color = 0x336699;
    /** Background color (colormode) of buttons, color object. */
    private static Color Button_Bg_Color;
    /** Foreground color (colormode) of not-selected button, RGB value. */
    private static final int button_fg_off_color = 0xFF9933;
    /** Foreground color (colormode) of not-selected button, color
     *  object. */
    private static Color Button_Fg_Off_Color;
    /** Foreground color (colormode) of selected button, RGB value. */
    private static final int button_fg_on_color = 0xFFFFCC;
    /** Foreground color (colormode) of selected button, color object. */
    private static Color Button_Fg_On_Color;
    /** Background color (graymode) of buttons, RGB value. */
    private static final int button_bg_gray = Color.lightGray.getRGB();
    /** Background color (graymode) of buttons, color object. */
    private static Color Button_Bg_Gray;
    /** Foreground color (graymode) of selected button, RGB value. */
    private static final int button_fg_off_gray = Color.darkGray.getRGB();
    /** Foreground color (graymode) of selected button, color
     *  object. */
    private static Color Button_Fg_Off_Gray;
    /** Foreground color (graymode) of not-selected button, RGB value. */
    private static final int button_fg_on_gray = 0x000000;
    /** Foreground color (graymode) of not-selected button, color object. */
    private static Color Button_Fg_On_Gray;
    /** Background color (colormode) of bubbles, RGB value. */
    private static final int bubble_bg_color = 0xFFFFCC;
    /** Background color (colormode) of bubbles, color object. */
    private static Color Bubble_Bg_Color;
    /** Foreground color (colormode) of bubble, RGB value. */
    private static final int bubble_fg_color = 0x000000;
    /** Foreground color (colormode) of bubble, color object. */
    private static Color Bubble_Fg_Color;
    /** Background color (graymode) of bubbles, RGB value. */
    private static final int bubble_bg_gray = 0xFFFFFF;
    /** Background color (graymode) of bubbles, color object. */
    private static Color Bubble_Bg_Gray;
    /** Foreground color (graymode) of bubble, RGB value. */
    private static final int bubble_fg_gray = 0x000000;
    /** Foreground color (graymode) of bubble, color object. */
    private static Color Bubble_Fg_Gray;
    /** Foreground color (colormode) of bubble border, RGB value. */
    private static final int bubble_border_color = 0x000000;
    /** Foreground color (colormode) of bubble border, color object. */
    private static Color Bubble_Border_Color;
    /** Foreground color (graymode) of bubble border, RGB value. */
    private static final int bubble_border_gray = 0x000000;
    /** Foreground color (graymode) of bubble border, color object. */
    private static Color Bubble_Border_Gray;
    /** Foreground color (colormode) of bubble highlight, RGB value. */
    private static final int bubble_highlight_color = 0xFF9933;
    /** Foreground color (colormode) of bubble highlight, color object. */
    private static Color Bubble_Highlight_Color;
    /** Foreground color (graymode) of bubble highlight, RGB value. */
    private static final int bubble_highlight_gray = 0x000000;
    /** Foreground color (graymode) of bubble highlight, color object. */
    private static Color Bubble_Highlight_Gray;
    /** Background color (colormode) for selection of suboptions, RGB value. */
    private static final int suboption_bg_color = 0x336699;
    /** Background color (colormode) for selection of suboptions,
     *  color object. */
    private static Color SubOption_Bg_Color;
    /** Foreground color (colormode) for selection of suboptions, RGB value. */
    private static final int suboption_fg_color = 0xFFFFCC;
    /** Foreground color (colormode) for selection of suboptions,
     *  color object. */
    private static Color SubOption_Fg_Color;
    /** Background color (graymode) for selection of suboptions, RGB value. */
    private static final int suboption_bg_gray = Color.lightGray.getRGB();
    /** Background color (graymode) for selection of suboptions,
     *  color object. */
    private static Color SubOption_Bg_Gray;
    /** Foreground color (graymode) for selection of suboptions, RGB value. */
    private static final int suboption_fg_gray = 0x000000;
    /** Foreground color (graymode) for selection of suboptions,
     *  color object. */
    private static Color SubOption_Fg_Gray;
    /** Background color (colormode) for a dialog message, RGB value. */
    private static final int dialog_bg_color = 0xAAAAFF;
    /** Background color (colormode) for a dialog message, color object. */
    private static Color Dialog_Bg_Color;
    /** Foreground color (colormode) for a dialog message, RGB value. */
    private static final int dialog_fg_color = 0x000000;
    /** Foreground color (colormode) for a dialog message, color object. */
    private static Color Dialog_Fg_Color;
    /** Background color (graymode) for a dialog message, RGB value. */
    private static final int dialog_bg_gray = 0xAAAAAA;
    /** Background color (graymode) for a dialog message, color object. */
    private static Color Dialog_Bg_Gray;
    /** Foreground color (graymode) for a dialog message, RGB value. */
    private static final int dialog_fg_gray = 0x000000;
    /** Foreground color (graymode) for a dialog message, color object. */
    private static Color Dialog_Fg_Gray;
    /** Background color (colormode) for a dialog message, RGB value. */
    private static final int dialogalert_bg_color = 0xAAAAFF;
    /** Background color (colormode) for a dialog message, color object. */
    private static Color DialogAlert_Bg_Color;
    /** Foreground color (colormode) for a dialog alert message, RGB value. */
    private static final int dialogalert_fg_color = 0xFF0000;
    /** Foreground color (colormode) for a dialog message, color object. */
    private static Color DialogAlert_Fg_Color;
    /** Background color (graymode) for a dialog message, RGB value. */
    private static final int dialogalert_bg_gray = 0xAAAAAA;
    /** Background color (graymode) for a dialog message, color object. */
    private static Color DialogAlert_Bg_Gray;
    /** Foreground color (graymode) for a dialog message, RGB value. */
    private static final int dialogalert_fg_gray = 0x000000;
    /** Foreground color (graymode) for a dialog message, color object. */
    private static Color DialogAlert_Fg_Gray;
    /** Background color (colormode) for text entry, RGB value. */
    private static final int entry_bg_color = 0xAAAAFF;
    /** Background color (colormode) for text entry, color object. */
    private static Color Entry_Bg_Color;
    /** Background color (graymode) for text entry, RGB value. */
    private static final int entry_bg_gray = 0xAAAAAA;
    /** Background color (graymode) for text entry, color object. */
    private static Color Entry_Bg_Gray;

    /** Part of a buffer used to avoid flicker. */
    private static Image temp_screen_image;

    /** Part of a buffer used to avoid flicker. */
    private static Graphics temp_screen;

    /** Font for banner. */
    private static Font font_banner;
    /** Font metrics for banner. */
    private static FontMetrics metrics_banner;
    /** Font for buttons. */
    private static Font font_button;
    /** Font metrics for buttons. */
    private static FontMetrics metrics_button;
    /** Superscript font for buttons. */
    private static Font font_button_sup;
    /** Superscript metrics for buttons. */
    private static FontMetrics metrics_button_sup;
    /** Font for status text on buttons. */
    private static Font small_font_button;
    /** Font metrics for status text on buttons. */
    private static FontMetrics small_metrics_button;
    /** Font for dialog message. */
    private static Font font_message;
    /** Font metrics for dialog message. */
    private static FontMetrics metrics_message;
    /** Font for dialog message. */
    private static Font font_bmessage;
    /** Font metrics for dialog message. */
    private static FontMetrics metrics_bmessage;
    /** Font for dialog message. */
    private static Font font_status;
    /** Font metrics for dialog message. */
    private static FontMetrics metrics_status;
    /** Font for linking words. */
    private static Font font_linkingword;
    /** Font metrics for linking words. */
    private static FontMetrics metrics_linkingword;
    /** Font for concept words. */
    private static Font font_concept;
    /** Font metrics for concept words. */
    private static FontMetrics metrics_concept;

    // Concept map metrics.
    /** Number of concepts and linking words. */
    private static int number_words = 0;
    /** Number of concepts and linking words. */
    private static boolean one_word_flag = false;
    /** Number of concepts. */
    private static int number_conceptwords = 0;
    /** Number of linking words. */
    private static int number_linkingwords = 0;
    /** Number of connections (links). */
    private static int number_links;

    // Arrays which store concepts, linking words, and connections.
    /** holds both concepts and linking words */
    private static MoveableWord words[];
    /** An array of ordered pairs. */
    private static Link links[];

    /** Action button (helps for a browser compatible non-AWT solution). */
    private static ActionButton text_entry_button;

    // Menu buttons (when they are pressed, the "mode" variable changes).
    /** MOVE a concept word. */
    private static MenuButton move_button;
    /** ADD to the concept map. */
    private static MenuButton add_button;
    /** DELETE from the concept map. */
    private static MenuButton edit_button;
    /** VIEW the concept map. */
    private static MenuButton view_button;
    /** SAVE the concept map. */
    private static MenuButton save_button;
    /** GRADE the concept map. */
    private static MenuButton grade_button;

    /** The text suboption that is to be highlighted. */
    private static String Bubble_Highlight_TextPattern;

    /** The menu features which are to be hidden/disabled
     *  on the web client. */
    private static String disable_string;

    /** The canvas size for the applet (space_width x space_height). */
    private static String canvassize_string;

    /** The font size for the concept and linking words. */
    private static String fontsize_string;

    /** The set of concept maps the given web client refers to. */
    private static String gallery;

    /** The message to display during saving. */
    private static String save_banner_text;

    /** The message to display during robograding. */
    private static String robograder_banner_text;

    /** The message to display during robograding. */
    private static String resize_banner_text;

    /** Default button width dimension */
    private static final int button_width = 70;

    /** Default button height dimension */
    private static final int button_height = 25;

    // Dimensions for the connecting links' arrowheads.
    /** Length of a connecting link's arrowhead. */
    private static final int link_arrowhead_length = 12;
    /** Width of a connecting link's arrowhead. */
    private static final int link_arrowhead_width = 5;
    /** Thickening of link. */
    private static final int link_linkthickener_width = 1;
    
    /** Offset text rightwards in menu buttons. */
    private static final int menu_button_text_offset = 0;

    /** Index used for parsing canvassize_string. */
    private static int x_index = 0;

    /**
     * Unescape string.  A '@' ("at" sign) + ';'
     * ("semicolon" sign) combination is used since
     * java's getParameter method can pre-empt processing
     * of ampersand-semicolon escaping.
     * @param word The word to substitute escaped values with "real" values.
     */
    public String unescape (String word)
      {
	String newword; // Used to temporarily store fixing of word.
	String escapefrag; // Escaped fragment of the word.
	int atsign_index = -2;
	int semicolon_index = 0;
	int atstring_index = 0;
	int semiback = 0;
	atstring_index = 0;
	atsign_index = 0;
	while (atsign_index != -1 && atsign_index != -2)
	  {
	    atsign_index = word.indexOf("@",atstring_index);
	    semicolon_index = word.indexOf(";",atstring_index);
	    while (semicolon_index < atsign_index &&
		   semicolon_index != -1)
	      {
		semicolon_index = word.indexOf(";",semicolon_index+1);
	      }
	    semiback = 0;
	    if (atsign_index != -1 &&
		semicolon_index != -1 &&
		atsign_index < semicolon_index)
	      {
		escapefrag = word.substring(atsign_index + 1,
					    semicolon_index);
		if (escapefrag.equals("comma"))
		  {
		    newword = word.substring(0,atsign_index) +
			"," +
			word.substring(semicolon_index+1,
				       word.length());
		    word = newword;
		    semiback = 6;
		  }
		else if (escapefrag.equals("amp"))
		  {
		    newword = word.substring(0,atsign_index) + "&" +
			word.substring(semicolon_index+1,word.length());
		    word = newword;
		    semiback = 4;
		  }
		else if (escapefrag.equals("nbsp"))
		  {
		    newword = word.substring(0,atsign_index) + " " +
			word.substring(semicolon_index+1,word.length());
		    word = newword;
		    semiback = 5;
		  }
		else if (escapefrag.equals("at"))
		  {
		    newword = word.substring(0,atsign_index) + "@" +
			word.substring(semicolon_index+1,word.length());
		    word = newword;
		    semiback = 3;
		  }
		else if (escapefrag.equals("quote"))
		  {
		    newword = word.substring(0,atsign_index) +
			"\"" +
			word.substring(semicolon_index+1,
				       word.length());
		    word = newword;
		    semiback = 6;
		  }
		else if (escapefrag.equals("single"))
		  {
		    newword = word.substring(0,atsign_index) +
			"'" +
			word.substring(semicolon_index+1,
				       word.length());
		    word = newword;
		    semiback = 7;
		  }
		else if (escapefrag.equals("back"))
		  {
		    newword = word.substring(0,atsign_index) +
			"\\" +
			word.substring(semicolon_index+1,
				       word.length());
		    word = newword;
		    semiback = 7;
		  }
		else if (escapefrag.equals("gt"))
		  {
		    newword = word.substring(0,atsign_index) +
			">" +
			word.substring(semicolon_index+1,
				       word.length());
		    word = newword;
		    semiback = 7;
		  }
		else if (escapefrag.equals("lt"))
		  {
		    newword = word.substring(0,atsign_index) +
			"<" +
			word.substring(semicolon_index+1,
				       word.length());
		    word = newword;
		    semiback = 7;
		  }
		else
		  {
		    word = "&amp;" + escapefrag + ";";
		  }
	      }
	    atstring_index = semicolon_index + 1 - semiback;
	    if (semicolon_index == -1)
	      {
		atsign_index = -2;
	      }
	  }
	return word;
      }
    // END unescape

    /**
     * Constructor.  Things to do before launching applet in runtime
     * environment.
     */
    public ConceptWebClient()
      {
	// Don't look for BeanInfo or $COMClassObject (prevent error_log spam).
	try
	  {
	    java.beans.Introspector.setBeanInfoSearchPath(null);
	  }
	catch (Exception e)
	  {
	  }
      }
    // END ConceptWebClient constructor

    /**
     * Take a list of strings and shuffle them.
     * @param string_list The list to shuffle.
     */
    public static void stringlist_shuffle(String[] string_list)
      {
	String tempstring = new String();
	for (int idx1 = string_list.length; idx1 > 0; idx1--)
	  {
	    int idx2 = (int)(Math.random()*string_list.length);
	    tempstring = string_list[idx1 - 1];
	    string_list[idx1-1] = new String(string_list[idx2]);
	    string_list[idx2] = new String(tempstring);
	  }
      }

    /**
     * Run once at beginning of program.
     * Initializes values with various predefined constants.
     * (Note that this is a very lengthy method.)
     */
    public void init ()
      {
	    try {Thread.sleep(500);} catch (Exception e) {}
	rtry = 1;

	// Don't look for BeanInfo or $COMClassObject (prevent error_log spam).
	try
	  {
	    java.beans.Introspector.setBeanInfoSearchPath(null);
	  }
	catch (Exception e)
	  {
	  }


	/*	try
	  {
	    image_icon1 = getImage(new URL("http://ctools.msu.edu/ctools/ctools_images/newscience.gif"));
	  }
	catch (IOException e)
	  {
	  }
	*/
	// Define the server talker object.
	this.server_talker = new ServerTalker();

	// Define the robograding object.
	this.robo = new Robograde();

	// Tell applet that it is to listen for mouse-related events.
	this.addMouseListener(this);
	this.addMouseMotionListener(this);

	this.color = true;
	ActionButton.colormode_on();
	MenuButton.colormode_on();
	MoveableWord.colormode_on();
	Link.colormode_on();
	BubbleMenuHelp.colormode_on();
	Message.colormode_on();
	Robograde.colormode_on();

	// Initialize background color values.
	this.Background_Color = new Color(this.background_color);
	this.Background_Gray = new Color(this.background_gray);

	this.setBackground(Background_Gray); // Set default background color.

	// Initialize other color values.
	this.Footer_Fg_Color = new Color(this.footer_fg_color);
	this.Footer_Fg_Gray = new Color(this.footer_fg_gray);
	this.Incorrect_Fg_Color = new Color(this.incorrect_fg_color);
	this.Incorrect_Fg_Gray = new Color(this.incorrect_fg_gray);
	this.Neutral_Fg_Color = new Color(this.neutral_fg_color);
	this.Neutral_Fg_Gray = new Color(this.neutral_fg_gray);
	this.Correct_Fg_Color = new Color(this.correct_fg_color);
	this.Correct_Fg_Gray = new Color(this.correct_fg_gray);
	this.Conceptword_Fg_Color = new Color(this.conceptword_fg_color);
	this.Conceptword_Bg_Color = new Color(this.conceptword_bg_color);
	this.Conceptword_Fg_Gray = new Color(this.conceptword_fg_gray);
	this.Conceptword_Bg_Gray = new Color(this.conceptword_bg_gray);
	this.Conceptword_Fg_Brd_Gray = new Color(this.conceptword_fg_brd_gray);
	this.Linkingword_Fg_Color = new Color(this.linkingword_fg_color);
	this.Linkingword_Bg_Color = new Color(this.linkingword_bg_color);
	this.Linkingword_Fg_Gray = new Color(this.linkingword_fg_gray);
	this.Linkingword_Bg_Gray = new Color(this.linkingword_bg_gray);
	this.Linkingword_Fg_Brd_Gray = new Color(this.linkingword_fg_brd_gray);
	this.Link_Fg_Color = new Color(this.link_fg_color);
	this.Link_Fg_Gray = new Color(this.link_fg_gray);
	this.Link_Targetbox_Fg_Color = new Color(this.link_targetbox_fg_color);
	this.Link_Targetbox_Fg_Gray = new Color(this.link_targetbox_fg_gray);
	this.Button_Fg_On_Color = new Color(this.button_fg_on_color);
	this.Button_Fg_Off_Color = new Color(this.button_fg_off_color);
	this.Button_Bg_Color = new Color(this.button_bg_color);
	this.Button_Fg_On_Gray = new Color(this.button_fg_on_gray);
	this.Button_Fg_Off_Gray = new Color(this.button_fg_off_gray);
	this.Button_Bg_Gray = new Color(this.button_bg_gray);
	this.Bubble_Fg_Color = new Color(this.bubble_fg_color);
	this.Bubble_Bg_Color = new Color(this.bubble_bg_color);
	this.Bubble_Fg_Gray = new Color(this.bubble_fg_gray);
	this.Bubble_Bg_Gray = new Color(this.bubble_bg_gray);
	this.Bubble_Border_Color = new Color(this.bubble_border_color);
	this.Bubble_Border_Gray = new Color(this.bubble_border_gray);
	this.Bubble_Highlight_Color = new Color(this.bubble_highlight_color);
	this.Bubble_Highlight_Gray = new Color(this.bubble_highlight_gray);
	this.SubOption_Fg_Color = new Color(this.suboption_fg_color);
	this.SubOption_Bg_Color = new Color(this.suboption_bg_color);
	this.SubOption_Fg_Gray = new Color(this.suboption_fg_gray);
	this.SubOption_Bg_Gray = new Color(this.suboption_bg_gray);
	this.Dialog_Fg_Color = new Color(this.dialog_fg_color);
	this.Dialog_Bg_Color = new Color(this.dialog_bg_color);
	this.Dialog_Fg_Gray = new Color(this.dialog_fg_gray);
	this.Dialog_Bg_Gray = new Color(this.dialog_bg_gray);
	this.DialogAlert_Fg_Color = new Color(this.dialogalert_fg_color);
	this.DialogAlert_Bg_Color = new Color(this.dialogalert_bg_color);
	this.DialogAlert_Fg_Gray = new Color(this.dialogalert_fg_gray);
	this.DialogAlert_Bg_Gray = new Color(this.dialogalert_bg_gray);
	this.Entry_Bg_Color = new Color(this.entry_bg_color);
	this.Entry_Bg_Gray = new Color(this.entry_bg_gray);

	this.Bubble_Highlight_TextPattern = new String("SUBMIT");

	this.save_banner_text = new String("SAVING...");
	this.robograder_banner_text = new String("ROBOGRADING...");
	this.resize_banner_text = new String("RESIZING...");

	// Get the expiration key for this session.
	// Get the document base for this server.
	this.document_base = this.getParameter("DOCUMENTBASE");
	this.expiration_key = this.getParameter("EXPIRATION_KEY");
	try {Thread.sleep(500);} catch (Exception e) {}

	// Safari w/ jdk1.4.1 does not always get the applet params
        // (safari jdk1.4.1 glitch that needs to be programmed around).
	// make safari w/ jdk1.4.1 happy...
        if (document_base == null)
	  {
	    try {Thread.sleep(500);} catch (Exception e) {}
            System.out.println("Glitch: no documentbase parameter");
	    document_base = new String("http://ctools.msu.edu/ctools");
	    /*	    try {rtry = 1; URL url = new
		     URL(document_base+"/ConceptServerScript.cgi"+"?rtry=1");
		getAppletContext().showDocument(url);} catch (Exception e) {}
	    */
	  }
	rtry = 0;
	if (expiration_key == null)
	  {
	    try {Thread.sleep(500);} catch (Exception e) {}
	    this.expiration_key = this.getParameter("EXPIRATION_KEY");
	  }	
	if (expiration_key == null && rtry != 1)
	  {
            System.out.println("Glitch: no expiration_key parameter");
	    try {rtry = 1; URL url = new
		     URL(document_base+"/ConceptServerScript.cgi"+"?rtry=1");
		getAppletContext().showDocument(url);} catch (Exception e) {}
	  }

	// font size for concept and linking words
	this.fontsize_string = this.getParameter("FONTSIZE");

	// make safari w/ jdk1.4.1 happy...
	if (this.fontsize_string == null && rtry != 1)
	  {
            System.out.println("Glitch: no fontsize parameter");
	    try {rtry = 1; URL url = new
		     URL(document_base+"/ConceptServerScript.cgi"+"?rtry=1");
		getAppletContext().showDocument(url);} catch (Exception e) {}
	  }

	if (this.fontsize_string == null)
	  {
	    this.fontsize_string = new String(" default ");
	  }

	if (this.fontsize_string != null)
	  {
	    if (fontsize_string.indexOf("-1",0) != -1)
	      {
		this.font_size = 8;
	      }
	    else if (fontsize_string.indexOf("default",0) != -1)
	      {
		this.font_size = 10;
	      }
	    else if (fontsize_string.indexOf("+1",0) != -1)
	      {
		this.font_size = 12;
	      }
	    else if (fontsize_string.indexOf("+2",0) != -1)
	      {
		this.font_size = 16;
	      }
	    else if (fontsize_string.indexOf("+3",0) != -1)
	      {
		this.font_size = 30;
	      }
	  }

	// The drawing area dimensions (user-specified) for the concept map.
	this.canvassize_string = this.getParameter("CANVASSIZE");
	// make safari w/ jdk1.4.1 happy...
        if (canvassize_string == null && rtry != 1)
	  {
            System.out.println("Glitch: no canvassize parameter");
	    try {rtry = 1; URL url = new
		     URL(document_base+"/ConceptServerScript.cgi"+"?rtry=1");
		getAppletContext().showDocument(url);} catch (Exception e) {}
	  }
        if (canvassize_string == null)
	  {
	    canvassize_string = "768x480";
	  }
        if (canvassize_string != null)
	  {
	    x_index =
		canvassize_string.indexOf("x",0);
	    space_width =
		Integer.parseInt(canvassize_string.substring(0,x_index));
	    space_height =
		Integer.parseInt(canvassize_string.substring(x_index+1,
						  canvassize_string.length()));

	    // Recompute the width of the entire applet.
	    applet_width =
		left_space+space_width+right_space;

	    // Recompute the height of the entire applet.
	    applet_height =
		top_space+space_height+bottom_space;
	  }

	this.resize(this.applet_width,
		    this.applet_height); // Specify applet dimensions.

	// Set up buffer if available (so as to reduce screen flickering).
	try
	  {
	    this.temp_screen_image = this.createImage(this.applet_width,
						      this.applet_height);
	    this.temp_screen = this.temp_screen_image.getGraphics();
	  }
	catch (Exception e)
	  {
	    // double-buffering not available
	    this.temp_screen = null;
	  }

	// Specify fonts.

	// The font used for large banner text (for saving status).
	this.font_banner = new Font("Helvetica", Font.BOLD, 30);
	if (this.font_banner == null)
	  {
	    this.font_banner = this.getFont();
	  }
	this.metrics_banner = this.getFontMetrics(this.font_banner);

	// The font used for menu buttons and also BubbleMenuHelp SubOptions.
	this.font_button = new Font("Helvetica", Font.BOLD, 10);
	if (this.font_button == null)
	  {
	    this.font_button = this.getFont();
	  }
	this.metrics_button = this.getFontMetrics(this.font_button);

	// The font used for menu buttons and also BubbleMenuHelp SubOptions.
	this.font_button_sup = new Font("Helvetica", Font.PLAIN, 8);
	if (this.font_button_sup == null)
	  {
	    this.font_button_sup = this.getFont();
	  }
	this.metrics_button_sup = this.getFontMetrics(this.font_button_sup);

	// The font used to add status entries to menu buttons (deprecated).
	this.small_font_button = new Font("Helvetica", Font.PLAIN, 8);
	if (this.small_font_button == null)
	  {
	    this.small_font_button = this.getFont();
	  }
	this.small_metrics_button =
	    this.getFontMetrics(this.small_font_button);

	// The font used to display info in the top and bottom applet regions.
	this.font_message = new Font("Helvetica", Font.PLAIN, 10);
	if (this.font_message == null)
	  {
	    this.font_message = this.getFont();
	  }
	this.metrics_message = this.getFontMetrics(this.font_message);

	// The font used to label the lower left entry box.
	this.font_bmessage = new Font("Helvetica", Font.BOLD, 10);
	if (this.font_bmessage == null)
	  {
	    this.font_bmessage = this.getFont();
	  }
	this.metrics_bmessage = this.getFontMetrics(this.font_bmessage);

	// The font used to display status info in the top applet region.
	this.font_status = new Font("Helvetica", Font.PLAIN, 10);
	if (this.font_status == null)
	  {
	    this.font_status = this.getFont();
	  }
	this.metrics_status = this.getFontMetrics(this.font_status);

	// The font used for linking words.
	this.font_linkingword = new Font("Helvetica", Font.PLAIN, this.font_size);
	if (this.font_linkingword == null)
	  {
	    this.font_linkingword = this.getFont();
	  }
	this.metrics_linkingword = this.getFontMetrics(this.font_linkingword);

	// The font used for concept words.
	this.font_concept = new Font("Helvetica", Font.BOLD, this.font_size);
	if (this.font_concept == null)
	  {
	    this.font_concept = this.getFont();
	  }
	this.metrics_concept = this.getFontMetrics(this.font_concept);

	// Initialize concept words with spatial offsets, fonts, and colors.
	MoveableWord.conceptword_configure(this.left_space,
					   this.top_space,
					   this.font_concept,
					   this.metrics_concept,
					   this.Conceptword_Fg_Color,
					   this.Conceptword_Bg_Color,
					   this.Conceptword_Fg_Gray,
					   this.Conceptword_Bg_Gray,
					   this.Conceptword_Fg_Brd_Gray);
	// Initialize linking words with spatial offsets, fonts, and colors.
	MoveableWord.linkingword_configure(this.left_space,
					   this.top_space,
					   this.font_linkingword,
					   this.metrics_linkingword,
					   this.Linkingword_Fg_Color,
					   this.Linkingword_Bg_Color,
					   this.Linkingword_Fg_Gray,
					   this.Linkingword_Bg_Gray,
					   this.Linkingword_Fg_Brd_Gray);
	
	// Initialize connecting line characteristics.
	Robograde.configure(this.Incorrect_Fg_Color,
			    this.Incorrect_Fg_Gray,
			    this.Neutral_Fg_Color,
			    this.Neutral_Fg_Gray,
			    this.Correct_Fg_Color,
			    this.Correct_Fg_Gray
			    );
	
	// Initialize connecting line characteristics.
	Link.configure(this.link_arrowhead_length,
		       this.link_arrowhead_width,
		       this.link_linkthickener_width,
		       this.Link_Fg_Color,this.Link_Fg_Gray,
		       this.Link_Targetbox_Fg_Color,this.Link_Targetbox_Fg_Gray
		       );
	
	this.number_links = 0; // The map starts with zero links (connections).
	this.words = new MoveableWord[100]; // 100 words maximum.
	this.links = new Link[100]; // 100 links maximum.
	// Instantiate 100 possible links.
	for (int i = 0; i < 100; i++)
	  {
	    this.links[i] = new Link();
	  }

	// Getting the **** APPLET PARAMETERS **** (specified in HTML code).

	// Note, getParameter(CANVASSIZE) is not processed here, but is
        // processed above in this code, so is FONTSIZE.
        // (appropriately prior to the resize() function)

	// Get the session id key for this session.
	this.sid = this.getParameter("sid");
	// make safari w/ jdk1.4.1 happy...
        if (sid == null && rtry != 1)
	  {
	    try {rtry = 1; URL url = new
		   URL(document_base+"/ConceptServerScript.cgi"+"?rtry=1");
		getAppletContext().showDocument(url);} catch (Exception e) {}
	  }
	// Get the map name for this map.
	this.mapname = this.getParameter("MAPNAME");

	// Determine which menu buttons, if any, should be disabled.
	this.disable_string = this.getParameter("DISABLE");
	// make safari w/ jdk1.4.1 happy...
        if (disable_string == null && rtry != 1)
	  {
	    try {rtry = 1; URL url = new
		   URL(document_base+"/ConceptServerScript.cgi"+"?rtry=1");
		getAppletContext().showDocument(url);} catch (Exception e) {}
	  }

	// The set of maps a concept map refers to.
	this.gallery = this.getParameter("GALLERY");

	// Read the parameters of concepts and linking words
	// (e.g. An instructor might want to have the applet
	//  start with a pre-existing set of concept words and
	//  linking words).
	String conceptword_string = this.getParameter("CONCEPTWORDS");
	String linkingword_string = this.getParameter("LINKINGWORDS");

        // If concept and linkingword parameters are defined.
	if (conceptword_string != null &&
	    linkingword_string != null)
	  {
            // Perform comma-based parsing apart of fields within strings.
	    int last_string_index = 0;
	    int string_index = conceptword_string.indexOf(",",0);
	    
	    // These arrays will hold the fields within the string.
	    // Lists of Concepts and Linking Words.
	    String conceptword_list[] = new String[200];
	    String linkingword_list[] = new String[200];

	    String word; // Current field within string being considered.

	    this.number_words = 0; // Set the number of words to be
	                           // zero.
	    this.number_conceptwords = 0; // Set the number of concept words
	                                  // to be zero.
	    this.number_linkingwords = 0; // Set the number of linking words
	                                  // to be zero.
	    // Parse the conceptword_string for comma-separated fields.
	    while (string_index != -1)
	      {
		word =
		    conceptword_string.substring(last_string_index,
						 string_index);
		last_string_index = string_index+1;
		string_index =
		    conceptword_string.indexOf(",",
					       last_string_index);
		conceptword_list[number_conceptwords] = word;
		number_words++;
		number_conceptwords++;
	      }
	    if (number_conceptwords > 0) // Then grab last field.
	      {
		word =
		    conceptword_string.substring(last_string_index,
						 conceptword_string.length());
		/*		System.out.println(
				   "numword: "+number_words+"; "+
				   "conceptword: "+number_conceptwords+"; "+
				   "word: "+word+"; "
				   );*/
		conceptword_list[number_conceptwords] = word;
		number_words++;
		number_conceptwords++;
	      }

	    // Parse the linkingword_string for comma-separated fields.
	    last_string_index = 0;
	    string_index = linkingword_string.indexOf(",",0);

	    while (string_index != -1)
	      {
		word =
		    linkingword_string.substring(last_string_index,
						 string_index);
		last_string_index = string_index+1;
		string_index =
		    linkingword_string.indexOf(",",
					       last_string_index);
		linkingword_list[number_linkingwords] = new String(word);
		number_words++;
		number_linkingwords++;
	      }

	    if (number_linkingwords > 0) // Then grab last field.
	      {
		word =
		    linkingword_string.substring(last_string_index,
						 linkingword_string.length());
		linkingword_list[number_linkingwords] = new String(word);
		number_words++;
		number_linkingwords++;
	      }

	    // Shuffle concept word list.
	    String tempstring = new String();
	    for (int idx1 = number_conceptwords; idx1 > 0; idx1--)
	      {
		int idx2 = (int)(Math.random()*number_conceptwords);
		tempstring = conceptword_list[idx1-1];
		conceptword_list[idx1-1] = new String(conceptword_list[idx2]);
		conceptword_list[idx2] = new String(tempstring);
	      }

	    // Translate concept word data into MoveableWord objects and store
	    // inside the "words" array.
	    for (int i = 0; i < number_conceptwords; i++)
	      {
		words[i] = new
		    MoveableWord(conceptword_list[i],"CONCEPT");

		// Potential X location for new word.
		int Xnewloc = left_space+space_width-100;
		// Potential Y location for new word.
		int Ynewloc = (int)(Math.random() *
		    (float)(this.space_height*1/8)) +
		    this.top_space;

	        int j2 = i-1;
		  dfs:
		while (j2 > -1)
	          {
		    if ((words[j2].Y > this.top_space) &&
  	              (words[j2].Y <= (this.top_space+(this.space_height*1/8)))
			)
		      {
			if (
			    words[j2].X <= (Xnewloc+words[i].width)
			    )
			  {
			    Xnewloc = words[j2].X-30;
			  }
			while (
			       words[j2].X <= (Xnewloc+words[i].width)
			       )
			  {
			    Xnewloc -= 30;
			  }
		      }
		    if (Xnewloc < (left_space+10))
		      {
			Ynewloc = (int)(Math.random() *
			    (float)(this.space_height*1/8)) +
			    (this.top_space+
			     (int)(float)(this.space_height*1/8))+15;
			Xnewloc = left_space+space_width-100;
		        break dfs;
		      }
		    j2--;
		  }
	        j2 = i-1;
		  dfs2:
		while (j2 > -1)
	          {
		    if (
	            (words[j2].Y > (this.top_space+(this.space_height*1/8))+15)
		    &&
		    (words[j2].Y < (this.top_space+(this.space_height*2/8))+15)
			)
		      {
			if (
			    words[j2].X <= (Xnewloc+words[i].width)
			    )
			  {
			    Xnewloc = words[j2].X-30;
			  }
			while (
			       words[j2].X <= (Xnewloc+words[i].width)
			       )
			  {
			    Xnewloc -= 30;
			  }
		      }
		    if (Xnewloc < (left_space+10))
		      {
			Ynewloc = (int)(Math.random() *
			    (float)(this.space_height*1/8)) +
			    (this.top_space+
			     (int)(float)(this.space_height*2/8))+30;
			Xnewloc = (int)(Math.random() *
				  (float)(space_width - words[i].width)
				  )+left_space;
		        break dfs2;
		      }
		    j2--;
		  }
		
		if ((Xnewloc+words[i].width)>(left_space+space_width))
		  {
		    Xnewloc = left_space+space_width-words[i].width-10;
		  }
		if (Xnewloc<(left_space+10))
		  {
		    Xnewloc = left_space+10;
		  }

		this.words[i].X = Xnewloc;
		this.words[i].Y = Ynewloc;
		this.words[i].set_center();
	      }

	    // Shuffle linking word list.
	    for (int idx1 = number_linkingwords; idx1 > 0; idx1--)
	      {
		int idx2 = (int)(Math.random()*number_linkingwords);
		tempstring = linkingword_list[idx1-1];
		linkingword_list[idx1-1] = new String(linkingword_list[idx2]);
		linkingword_list[idx2] = new String(tempstring);
	      }

	    // Translate linking word data into MoveableWord objects and store
	    // inside the "words" array.
	    for (int ip = 0; ip < number_linkingwords; ip++)
	      {
		int i = number_conceptwords+ip;
		words[i] = new
		    MoveableWord(linkingword_list[ip],"LINKINGWORD");

		// Potential X location for new word.
		int Xnewloc = left_space+space_width-100;
		// Potential Y location for new word.
		int Ynewloc = this.top_space+this.space_height-
		    15 - (int)(Math.random() *
			       (float)(this.space_height*1/8));

	        int j2 = i-1;
		  dfs3:
		while (j2>(number_conceptwords-1))
	          {
		    if (
			(words[j2].Y > (this.top_space+this.space_height-
					(this.space_height*1/8+15)))
			&&
			(words[j2].Y < (this.top_space+this.space_height))
			)
		      {
			if (
			    words[j2].X <= (Xnewloc+words[i].width)
			    )
			  {
			    Xnewloc = words[j2].X-30;
			  }
			while (
			       words[j2].X <= (Xnewloc+words[i].width)
			       )
			  {
			    Xnewloc -= 30;
			  }
		      }
		    if (Xnewloc < (left_space+10))
		      {
			Ynewloc = this.top_space + this.space_height -
			    30 - (int)(Math.random() *
			    (float)(this.space_height*1/8)) -
			    (int)(this.space_height*1/8);

			Xnewloc = left_space+space_width-100;
		        break dfs3;
		      }
		    j2--;
		  }
	        j2 = i-1;
		  dfs4:
		while (j2 > (number_conceptwords-1))
	          {
		    if (
			(words[j2].Y < (this.top_space+this.space_height-
					(this.space_height*1/8+15)))
			&&
			(words[j2].Y > (this.top_space+this.space_height-
					(this.space_height*2/8+30)))
			)
		      {
			if (
			    words[j2].X <= (Xnewloc+words[i].width)
			    )
			  {
			    Xnewloc = words[j2].X-30;
			  }
			while (
			       words[j2].X <= (Xnewloc+words[i].width)
			       )
			  {
			    Xnewloc -= 30;
			  }
		      }
		    if (Xnewloc < (left_space+10))
		      {
			Ynewloc = this.top_space + this.space_height -
			    45 - (int)(Math.random() *
			    (float)(this.space_height*1/8)) -
			    (int)(this.space_height*2/8);
			Xnewloc = (int)(Math.random() *
				  (float)(space_width - words[i].width)
				  )+left_space;
		        break dfs4;
		      }
		    j2--;
		  }
		
		if ((Xnewloc+words[i].width)>(left_space+space_width))
		  {
		    Xnewloc = left_space+space_width-words[i].width-10;
		  }
		if (Xnewloc<(left_space+10))
		  {
		    Xnewloc = left_space+10;
		  }
		if ((Ynewloc+words[i].height)>(top_space+space_height))
		  {
		    Ynewloc = top_space+space_height-words[i].height-10;
		  }

		this.words[i].X = Xnewloc;
		this.words[i].Y = Ynewloc;
		this.words[i].set_center();
	      }
	  }

	/*  BTL="block top left".
         *
	 *  Note, most of the time, when users start a concept map exercise,
	 *  BTLx, BTLy, WORDS, TYPES, and LINKS strings are left blank.
	 *
	 *  BTLx, BTLy, WORDS, TYPES, and LINKS strings are meant to help
	 *  retrieve saved concept maps that the user may have worked on in the
	 *  past.
	 *
	 *  These four strings (not including LINKS) are in a parallel
	 *  structure:
	 *  e.g. The first element of BTLx_string, BTLy_string, WORDS_string,
         *  and TYPES_string, all describe the first concept map word;
	 *  e.g. The second element of BTLx_string, BTLy_string, WORDS_string,
         *  and TYPES_string, all describe the second concept map word;
	 *  etc.
	 *
	 *  Another usage of these values would be to help customize
	 *  the initial concept map that is presented to the user.
         */
	String BTLx_string = getParameter("BTLx"); // Top left x of words.
	String BTLy_string = getParameter("BTLy"); // Top left y of words
	String WORDS_string = getParameter("WORDS"); // Text of words.
	String TYPES_string = getParameter("TYPES"); // CONCEPT or LINKINGWORD.

	// LINKS exist between the enumerated concept objects above.
	// LINKS is a list of ordered pairs where each pair consists of
	// two integers pointing to locations in the BTLx/BTLy/WORDS/TYPES
	// strings.
	String LINKS_string = getParameter("LINKS");

	if (BTLx_string != null && BTLy_string != null &&
	    WORDS_string != null && TYPES_string!=null) // If these all exist.
	  {
	    // For debugging.
	    // System.out.println(BTLx_string);
	    // System.out.println(BTLy_string);
	    // System.out.println(WORDS_string);
	    // System.out.println(TYPES_string);
	    // System.out.println(LINKS_string);

	    // Only accept up to 200 words maximum into the applet from the
	    // HTML parameters.
	    String word_list[] = new String[200]; // 200 word maximum array.

	    String word; // Used to temporarily store substrings.

	    number_words = 0; // Initialize the number of words to be zero.

	    // Parse the applet parameter WORDS (if exists).
	    // Also, determine a total count of concept map words.
	    int last_string_index = 0;
	    int string_index = WORDS_string.indexOf(",",0);
	    if (string_index == -1 && WORDS_string.length() > 0)
	      {
		one_word_flag = true;
	      }
	    while (string_index != -1)
	      {
		word = WORDS_string.substring(last_string_index,string_index);
		word = unescape(word);
		last_string_index = string_index+1;
		string_index = WORDS_string.indexOf(",",last_string_index);
		word_list[number_words] = word;
		number_words++;
	      }
	    if (number_words>0 || one_word_flag) // Then grab last field.
	      {
		// Specify string substring region having last WORDS value.
		word = WORDS_string.substring(last_string_index,
					      WORDS_string.length());
		word = unescape(word);
		word_list[number_words] = word;
		number_words++;
	      }
	    
	    // Parse the applet parameter TYPES (if exists).
	    // Also, determine a total count of "concept words"
	    // and "linking words"
	    // (i.e. concept_map_words = concept_words + linking_words).
	    String type_list[] = new String[200];
	    last_string_index = 0;
	    string_index = TYPES_string.indexOf(",",0);
	    int count = 0;
	    while (string_index != -1)
	      {
		word = TYPES_string.substring(last_string_index,string_index);
		last_string_index = string_index+1;
		string_index = TYPES_string.indexOf(",",last_string_index);
		if (word.equals("CONCEPT"))
		  {
		    type_list[count] = "CONCEPT";
		    number_conceptwords++;
		  }
		else
		  {
		    type_list[count] = "LINKINGWORD";
		    number_linkingwords++;
		  }
		count++;
	      }
	    if (number_words > 0 || one_word_flag) // Then grab last field.
	      {
		// Specify string substring region having last TYPES value.
		word = TYPES_string.substring(last_string_index,
					    TYPES_string.length());
		if (word.equals("CONCEPT"))
		  {
		    type_list[count] = "CONCEPT";
		    number_conceptwords++;
		  }
		else
		  {
		    type_list[count] = "LINKINGWORD";
		    number_linkingwords++;
		  }
	      }

	    // Parse the applet parameter BTLx (if exists).
	    int btlx_list[] = new int[200];
	    last_string_index = 0;
	    string_index = BTLx_string.indexOf(",",0);
	    count = 0;
	    while (string_index != -1)
	      {
		word = BTLx_string.substring(last_string_index,string_index);
		last_string_index = string_index+1;
		string_index = BTLx_string.indexOf(",",last_string_index);
		btlx_list[count] = Integer.parseInt(word);
		count++;
	      }
	    if (number_words > 0 || one_word_flag) // Then grab last field.
	      {
		// Specify string substring region having last BTLx value.
		word = BTLx_string.substring(last_string_index,
					     BTLx_string.length());
		btlx_list[count] = Integer.parseInt(word);
	      }

	    // Parse the applet parameter BTLy (if exists).
	    int btly_list[] = new int[200];
	    last_string_index = 0;
	    string_index = BTLy_string.indexOf(",",0);
	    count = 0;
	    while (string_index != -1)
	      {
		// Specify string substring region having last BTLy value.
		word = BTLy_string.substring(last_string_index,string_index);
		last_string_index = string_index+1;
		string_index = BTLy_string.indexOf(",",last_string_index);
		btly_list[count] = Integer.parseInt(word);
		count++;
	      }
	    if (number_words > 0 || one_word_flag) // Then grab last field.
	      {
		// Specify string substring region having last BTLy value.
		word = BTLy_string.substring(last_string_index,
					     BTLy_string.length());
		btly_list[count] = Integer.parseInt(word);
	      }

	    // Parse the applet parameter LINKS (if exists).
	    if (LINKS_string != null && LINKS_string.length() > 0)
	      {
		last_string_index = 0;
		string_index = LINKS_string.indexOf(",",0);
		count = 0;
		int sloc;
		String word1;
		String word2;
		while (string_index != -1)
		  {
		    word = LINKS_string.substring(last_string_index,
						  string_index);
		    last_string_index = string_index+1;
		    string_index = LINKS_string.indexOf(",",last_string_index);
		    sloc = word.indexOf(" ",0);
		    word1 = word.substring(0,sloc);
		    word2 = word.substring(sloc+1,word.length());
		    links[count].setValue(Integer.parseInt(word1),
					  Integer.parseInt(word2));
		    number_links++;
		    count++;
		  }
		if (LINKS_string.length() > 0) // Get the last unprocessed link
		  {
		    // Specify string substring region having last LINKS value.
		    word = LINKS_string.substring(last_string_index,
						  LINKS_string.length());
		    sloc = word.indexOf(" ",0);
		    word1 = word.substring(0,sloc);
		    word2 = word.substring(sloc+1,word.length());
		    links[count].setValue(Integer.parseInt(word1),
					  Integer.parseInt(word2));
		    number_links++;
		  }
	      }
	    // Calculate dimensions and positions of concept and linking words.
	    for (int i = 0; i < number_words; i++)
	      {
		// For debugging
		// System.out.println(word_list[i] + type_list[i] +
		//		      btlx_list[i] + btly_list[i]);
		words[i] = new MoveableWord(word_list[i],type_list[i]);
		int wordX = left_space+space_width/2;
		int wordY = top_space+space_height/2;
		while (wordY > (top_space+(space_height*1/8)))
		  {
		    wordX = (int)(Math.random() *
				  (float)(space_width - words[i].width)
				  )+left_space;
		    wordY = (int)(Math.random () *
				  (float)(space_height - words[i].height)
				  )+top_space;
		  }
		words[i].X = wordX; words[i].Y = wordY;
		words[i].X = btlx_list[i]+left_space;
		words[i].Y = btly_list[i]+top_space;
		words[i].set_center();
	      }
	  }

	// Dialog message coordinates.
	Message.configure(font_message,metrics_message,
			  Dialog_Fg_Color,Dialog_Bg_Color,
			  Dialog_Fg_Gray,Dialog_Bg_Gray,
			  left_space+5,15,left_space,0,space_width-100,
			  top_space);
 
	// Dialog status message coordinates.
	StatusMessage.configure(font_status,metrics_status,
				Dialog_Fg_Color,Dialog_Bg_Color,
				Dialog_Fg_Gray,Dialog_Bg_Gray,
				DialogAlert_Fg_Color,DialogAlert_Bg_Color,
				DialogAlert_Fg_Gray,DialogAlert_Bg_Gray,
				left_space+space_width-95,15,
				space_width+left_space-100,0,100,
				top_space);

	// Set initial mode to move.
	if (!is_disabled(1))
	  {
	    mode = new String("MOVE");
	  }
	else
	  {
	    mode = new String("");
	  }
	// Set initial submode to nothing.
	submode = new String("");

	// Set event counter to 1 (used for multiple-step-guidance such
	// as with connecting links).
	event_counter = 1;

	// Set dimensions, fonts, and colors of the menu buttons.
	MenuButton.configure(button_width,button_height,
			     font_button,small_font_button,
			     metrics_button,
			     menu_button_text_offset,
			     Button_Fg_On_Color,Button_Fg_Off_Color,
			     Button_Bg_Color,
			     Button_Fg_On_Gray,Button_Fg_Off_Gray,
			     Button_Bg_Gray
			     );

	// Set dimensions, fonts, and colors of the action buttons.
	ActionButton.configure(button_width,button_height,
			       font_button,small_font_button,
			       metrics_button,
			       menu_button_text_offset,
			       Button_Fg_On_Color,Button_Fg_Off_Color,
			       Button_Bg_Color,
			       Button_Fg_On_Gray,Button_Fg_Off_Gray,
			       Button_Bg_Gray
			       );

	// Configure BubbleMenuHelp objects (these pop-up when a menu button
	// is pressed).
	BubbleMenuHelp.configure(
				 font_button,metrics_button,
				 font_button_sup,metrics_button_sup,
				 font_message,metrics_message,
				 bubble_width,
				 Bubble_Fg_Color,Bubble_Bg_Color,
				 Bubble_Fg_Gray,Bubble_Bg_Gray,
				 SubOption_Fg_Color,SubOption_Bg_Color,
				 SubOption_Fg_Gray,SubOption_Bg_Gray,
				 Bubble_Border_Color,Bubble_Border_Gray,
				 Bubble_Highlight_Color,Bubble_Highlight_Gray,
				 Bubble_Highlight_TextPattern
				 );

	// Construct the text entry action button.
      	text_entry_button = new ActionButton(new String("add to map"),0,
					     230+top_space);

	// Construct the menu buttons with the text that should appear on them
	// as well as their coordinates.
      	move_button = new MenuButton(new String("MOVE"),0,
				     top_space+button_height*0);
	add_button = new MenuButton(new String("ADD"),0,
				    top_space+button_height*1);
	edit_button = new MenuButton(new String("EDIT"),0,
				       top_space+button_height*2);
	view_button = new MenuButton(new String("VIEW"),0,
				      top_space+button_height*3);
	save_button = new MenuButton(new String("SAVE"),0,
				     top_space+button_height*4);
	grade_button = new MenuButton(new String("GRADE"),0,
				      top_space+button_height*5);

	// Set the pop-out for the MOVE menu button.
	move_button.setPopOut(new
	    BubbleMenuHelp("Use your mouse to move concepts and linking words",
			   20,top_space,false),
	    new Message(new String("Move concepts and linking words.")));

	// Set the pop-out for the ADD menu button.
	add_button.setPopOut(new
	    BubbleMenuHelp("Press a button below",100,
			   top_space+button_height*1-15,true),
	    new Message(new String("Select add choice")));
	// Set suboptions for the ADD menu button.
	add_button.addSubOption(
	   new String("CONCEPT WORD"),
	   new String("i.e. \"Earth\""),
	   new Message(new String(
	            "Enter your new concept word or phrase in the Text Box.")),
	   !is_disabled(3)
	);
	add_button.addSubOption(
	   new String("LINKING WORD"),
	   new String("i.e. \"rotates\""),
	   new Message(new String(
                    "Enter your new linking word or phrase in the Text Box.")),
	   !is_disabled(4)
	);
	add_button.addSubOption(
	   new String("CONNECTING LINE"),
	   new String("generate line between 2 words"),
	   new Message(new String(
           "Click on the two concepts you wish to connect with a line link.")),
	   new Message(new String(
           "Click on the second of the two concepts you are connecting.")),
	   !is_disabled(5)
	);

	// Set the pop-out for the EDIT menu button.
	edit_button.setPopOut(new
	    BubbleMenuHelp("Press a button below",100,
			   top_space+button_height*2-15,true),
	    new Message(new String("Select edit choice")));
	// Set suboptions for the EDIT menu button.
	edit_button.addSubOption(
	   new String("DELETE WORD"),
	   new String("remove word"),
	   new Message(new String(
	            "Select the concept or linking word you wish to remove.")),
	   !is_disabled(8)
	);
	edit_button.addSubOption(
	   new String("DELETE LINES"),
	   new String("remove line links"),
	   new Message(new String(
				  "Click on a line's box to remove, "+
				  "or click on a "+
				  "word to remove adjoining lines.")),
	   !is_disabled(9)
	);
	edit_button.addSubOption(
	   new String("EDIT WORD"),
	   new String("change the contents of a word"),
	   new Message(new String(
				  "Click on a concept or linking word to "+
				  "alter its text.")),
	   new Message(new String(
				  "Change the text and click \"change word\" "+
                                  "button.")),
	   !is_disabled(8)
	);

	// Define the VIEW menu button attributes.
        view_button.setMode("basic");
	view_button.setPopOut(
	    new BubbleMenuHelp("Press a button below",100,
			       top_space+button_height*3-15,true),
	    new Message(new String("Select view option "+
		        "(current canvas size is "+
			space_width+"x"+space_height+")"))
	);

	// Set suboptions for the VIEW menu button.
	/*	view_button.addSubOption(
	   new String("EXPORT GRAPHIC"),
	   new String(
		"create graphic image to print, save or send"),
	   new Message(new String(
		     "A GIF is being compiled and will be displayed shortly")),
	   !is_disabled(11)
	   );*/
	view_button.addPrintSubOption(
	   new String("LANDSCAPE"),
	   new String("PORTRAIT"),
	   new String("TOGGLE COLOR"),
	   new String("Print Preview:"),
	   new Message(new String(
		     "A graphics image is being compiled and will be displayed shortly")),
	   !is_disabled(11)
	);
	/*	view_button.addSubOption(
	   new String("TOGGLE COLOR"),
	   new String("switch applet between COLORS and GRAYMODE"),
	   new Message(new String("Colors are switched")),
	   !is_disabled(12)
	   );*/
	view_button.addComplexSizeSubOption(
           new String("480x300"),
	   new String("768x480"),
	   new String("960x600"),
	   new String("1119x669"),
	   new String("1282x801"),
	   new String("1440x900"),
	   new String("SMALL"),
	   new String("MEDIUM"),
	   new String("LARGE"),
	   new String("Advanced"),
	   new String(canvassize_string),
	   new String("Resize:"),
	   new Message(new String("Applet resized")),
	   !is_disabled(12)
	);
	//	   new String(canvassize_string),
	/*	view_button.addSizeSubOption(
           new String("480x300"),
	   new String("768x480"),
	   new String("960x600"),
	   new String("1119x669"),
	   new String("1282x801"),
	   new String("1440x900"),
	   new String(canvassize_string),
	   new String("Resize:"),
	   new Message(new String("Applet resized")),
	   !is_disabled(12)
	   );*/
	view_button.addSizeSubOption(
	   new String("TOGGLE COLOR"),
	   new String(" -1 "),
	   new String(" default "),
	   new String(" +1 "),
	   new String(" +2 "),
	   new String(" +3 "),
	   new String(fontsize_string),
	   new String("Select font size:"),
	   new Message(new String("Concept map font size is changed")),
	   !is_disabled(12)
	);

	// Define the SAVE menu button attributes.
	save_button.setPopOut(new
	    BubbleMenuHelp("Press a button below",100,
			   top_space+button_height*4-15,true),
	    new Message(new String("Select save choice")));
	// Set suboptions for the SAVE menu button.
	save_button.addSubOption(
	   new String("SAVE NOW"),
	   new String("store map into your Map Gallery"),
	   new Message(new String("Data is being generated on the server")),
	   new Message(new String("Saving is complete")),
	   !is_disabled(14)
	);
	save_button.addSubOption(
	   new String("RECOVER"),
	   new String("try to recover autosaved work"),
	   new Message(new String("Server side data is being generated")),
	   !is_disabled(44)
	);
	save_button.addSubOption(
	   new String("EXPORT DATA"),
	   new String("download data for future import"),
	   new Message(new String("Export data is being compiled")),
	   !is_disabled(15)
	);

	// Define the GRADE menu button attributes.
	grade_button.setPopOut(new
	    BubbleMenuHelp("Press a button below",100,
			   top_space+button_height*5-15,true),
	    new Message(new String("Press a button below")));
	// Set suboptions for the GRADE menu button.
	if (!is_disabled(17))
	  {
	      grade_button.setPopOut(new
	          BubbleMenuHelp("Select SUBMIT to complete the assignment",
				 100,top_space+button_height*5-15,true),
 	          new Message(new
       String("You must select SUBMIT in order to complete this assignment")));
	}
	grade_button.addSubOption(new String("SUBMIT"),
			       new String("go to submit page"),
			       new Message(
                new String("Assignment is being submitted to the instructor")),
			       !is_disabled(17)
	);
	// Need to add superscripted TM
	grade_button.addSubOption(new String("SHOW ROBOGRADER"),
			       new String
			          ("view an automatic assessment of your map"),
			       new Message(
					   new String("Robograder is "+
						      "currently under "+
						      "development")),
			       !is_disabled(18)
        );

	setLayout(null); // Avoiding AWT layouts for the sake of browser
	                 // compatibility as well as standardizing the
	                 // space that students have available to generate
	                 // a concept map.  Since geometric distance cannot
	                 // be reliably specified for diverse browser AWT
	                 // implementations, space will be standardized
	                 // with pixels.

	// Add in AWT components for the keyboard entry of new words.
	text_entry_box = new TextField(6);//text_entry_box.setEditable(false);
	text_entry_box.setBounds(0,top_space+190,button_width,35);
	this.add(text_entry_box);
	
	/*	try
	  {
	    URL url =
		new URL(document_base+"/ConceptServerScript.cgi?action=");
	    // Start the general background thread (implements autosaving).
	    Thread gt = new GeneralThread(url,
					  getAppletContext(),
					  words,links,
					  number_words,
					  number_links,
					  server_talker,
					  getGraphics(),
					  expiration_key);
	    gt.setDaemon(true);
	    gt.start();
	  }
	catch (Exception e)
	  {
	  }
	*/	
      }
    // END init

    /**
     * Pushes information.</p><p>
     * Currently a lot of logic occurs inside here.  This function brings
     * together the pushing of information onto the:
     * <ul><li>client screen (web browser)</li>
     *     <li>network (URL or URI requests)</li>
     *     <li>internal interface state changes (as painting the menu is
     *         accomplished, interface state data is immediately recorded)</li>
     * </ul><p>
     * Other interface state changes also occur here such as drawing
     * in color mode versus gray mode.
     * The strategic idea regarding this function was inspired by the
     * fact that different java virtual machines invoke the
     * the paint and update methods at irreconcilably different times.
     * Thus, the goal is to synchronize the pushing of information
     * in one function as opposed to relying on paint, update, or repaint
     * to do everything consistently.</p><p>
     * In some respects, an additional advantage to this strategy is that
     * it makes the code organization less diffuse and, for the programmer,
     * helps process all information that needs to be passed to the user in
     * a concerted manner.
     */
    public void push_information_everywhere (Graphics g, Rectangle clip)
      {
	AppletContext ac = getAppletContext();

	// Note to self: this should probably be removed or commented out.
	if (clip.x == Integer.MIN_VALUE)
	  {
	    clip = new Rectangle(0, 0, getSize().width, getSize().height);
	  }

   // Consider the whole applet as a clipping area (for browser compatibility).
	clip = new Rectangle (0, 0, getSize().width, getSize().height);

	// Evaluate a color toggle action.
	if (mode.equals("VIEW"))
	  {
	    if (submode.equals("TOGGLE COLOR"))
	      {
		ActionButton.color_toggle();
		MenuButton.color_toggle();
		MoveableWord.color_toggle();
		Link.color_toggle();
		BubbleMenuHelp.color_toggle();
		Message.color_toggle();
		Robograde.color_toggle();
		if (color == true) {color = false;}
		else {color = true;}
	      }
	    else if (submode.equals("More Options"))
	      {
		MenuButton.setMode("advanced");
	      }
	    else if (submode.equals("Fewer Options"))
	      {
		MenuButton.setMode("basic");
	      }
	  }

	// Determine the map space background color.
	if (color == true)
	  {
	    g.setColor(Background_Color);
	  }
	else
	  {
	    g.setColor(Background_Gray);
	  }

	// Draw the map space (boundaried subspace inside applet space).
	g.fillRect(left_space, top_space, space_width, space_height);

	// Draw the left, top, and bottom portions of the applet.
	// (These surround the map space above.)
	if (color == true)
	  {
	    g.setColor(Entry_Bg_Color);
	  }
	else
	  {
	    g.setColor(Entry_Bg_Gray);
	  }

	g.fillRect(0,0,left_space,applet_height);
	g.fillRect(0,0,applet_width,top_space);
	g.fillRect(0,top_space+space_height,applet_width,bottom_space);

	/*        g.setColor(Color.white);
        g.fillRect(image_x, image_y, image_width, image_height);
	g.setColor(Color.red);
	g.setFont(font_message);
	g.drawString("Test Icon",image_x+10,image_y+10);
	*/
	if (image_icon1 != null)
	  {
	    g.drawImage(image_icon1,image_x,image_y,this);
	  }
	// (There currently is not any right space that needs to be drawn.)

	// Draw connecting lines.
	if (submode.equals("ENACT ROBOGRADER"))
	  {
	    for (int j = 0; j < number_links; j++)
	      {
		links[j].draw(robo,j,g,
			      words[links[j].getIndex1()],
			      words[links[j].getIndex2()],
			      false);
	      }
	  }
	else
	  {
	    for (int j = 0; j < number_links; j++)
	      {
		links[j].draw(g,words[links[j].getIndex1()],
			      words[links[j].getIndex2()],
			      ((selected_word && !mode.equals("ADD")) &&
			       (selected_word && !(mode.equals("EDIT") &&
				!submode.equals("DELETE LINES")))
			       )
			      ||
			      (mode.equals("EDIT") &&
			       submode.equals("DELETE LINES"))
			      );
	      }
	  }

	// Draw the words (so that the words that were last added appear at
	//                 the front).
	for (int i = number_words - 1; i >= 0; i--) 
	  {
	    
	    // Only redraw the word if it exists inside the clipping region
	    // (but the clipping region is the entire applet...).
	    // the null thing makes safari w/ jdk1.4.1 happy
	    if (words[i] == null && rtry != 1)
	      {
		System.out.println("Glitch: Word is null; #"+i);
		try {rtry = 1; URL url = new
		     URL(document_base+"/ConceptServerScript.cgi"+"?rtry=1");
		getAppletContext().showDocument(url);} catch (Exception e) {}
	      }
	    if (words[i] != null &&
		words[i].inside_clip(clip.x, clip.y, clip.width, clip.height))
	      {
		if (submode.equals("ENACT ROBOGRADER"))
		  {
		    //		    words[i].draw(robo,i,g);
		    // Draw normally for now.
		    words[i].draw(g);
		  }
		else
		  {
		    words[i].draw(g);
		  }
	      }
	  }

	// Set the font in the graphics context.
	g.setFont(font_message);

	if (color == true)
	  {
	    g.setColor(Entry_Bg_Color);
	  }
	else
	  {
	    g.setColor(Entry_Bg_Gray);
	  }

	g.fillRect(0,top_space+160,button_width,100);

	// Draw the menu buttons based on the "mode" and on the disabled
	// feature settings.  Also evaluate URL requests.
	if (mode.equals(""))
	  {
	    if (!is_disabled(1)) {move_button.draw(g,true);}
	    if (!is_disabled(2)) {add_button.draw(g,true);}
	    if (!is_disabled(7)) {edit_button.draw(g,true);}
	    if (!is_disabled(10)) {view_button.draw(g,true);}
	    if (!is_disabled(13)) {save_button.draw(g,true);}
	    if (!is_disabled(16)) {grade_button.draw(g,true);}
	  }
	else if (mode.equals("MOVE"))
	  {
	    mode_cycle = false; // This marks the end of the save animation.
	    move_button.draw(g,false);
	    if (!is_disabled(2)) {add_button.draw(g,true);}
	    if (!is_disabled(7)) {edit_button.draw(g,true);}
	    if (!is_disabled(10)) {view_button.draw(g,true);}
	    if (!is_disabled(13)) {save_button.draw(g,true);}
	    if (!is_disabled(16)) {grade_button.draw(g,true);}

	    if (event_counter == 1 && submode.equals("ON"))
	      {
		if (mousedown == true)
		  {
		    move_button.drawPopOut(g);
		  }
	      }
	    move_button.drawPopOutMessage(g);
	  }
	else if (mode.equals("ADD"))
	  {
	    if (!is_disabled(1)) {move_button.draw(g,true);}
	    if (!is_disabled(7)) {edit_button.draw(g,true);}
	    if (!is_disabled(10)) {view_button.draw(g,true);}
	    if (!is_disabled(13)) {save_button.draw(g,true);}
	    if (!is_disabled(16)) {grade_button.draw(g,true);}

	    if (color == true)
	      {
		g.setColor(Dialog_Bg_Color);
	      }
	    else
	      {
		g.setColor(Dialog_Bg_Gray);
	      }

	    g.fillRect(left_space, top_space+space_height, space_width, 25);

	    if (submode.equals(""))
	      {
		add_button.draw(g,false);
		add_button.drawPopOut(g);
		add_button.drawPopOutMessage(g);
	      }
	    else
	      {
		add_button.draw_with_blerb(g,false,submode);
		if (submode.equals("CONCEPT WORD"))
		  {
	            add_button.drawSubOptionMessage1(0,g);
		    if (event_counter == 1)
		      {
			this.add(text_entry_box);
			text_entry_box.setEditable(true);
			if (text_entry_box.getText().length() == 0)
			  {
			    text_entry_box.setText("enter");
			  }
			text_entry_box.setVisible(true);
			event_counter = 2;
		      }
		    g.setColor(MoveableWord.conceptword_bg);
		    g.fillRect(0,top_space+160,button_width,100);
		    g.setColor(MoveableWord.conceptword_fg);
		    g.setFont(font_bmessage);
		    g.drawString("Concept",10,top_space+175);
		    text_entry_button.changeText("add to map");
		    text_entry_button.draw(g,true);
		    if (color == false)
		      {
			g.setColor(Bubble_Border_Gray);
			g.drawRect(0,top_space+160,button_width,100);
		      }
		  }
		else if (submode.equals("LINKING WORD"))
		  {
	            add_button.drawSubOptionMessage1(1,g);
		    if (event_counter == 1)
		      {
			this.add(text_entry_box);
			text_entry_box.setEditable(true);
			if (text_entry_box.getText().length()==0)
			  {
			    text_entry_box.setText("enter");
			  }
			text_entry_box.setVisible(true);
			event_counter = 2;
		      }
		    g.setColor(MoveableWord.linkingword_bg);
		    g.fillRect(0,top_space+160,button_width,100);
		    g.setColor(MoveableWord.linkingword_fg);
		    g.setFont(font_bmessage);
		    g.drawString("Linking",10,top_space+175);
		    text_entry_button.changeText("add to map");
		    text_entry_button.draw(g,true);
		    if (color == false)
		      {
			g.setColor(Bubble_Border_Color);
			g.drawRect(0,top_space+160,button_width,100);
		      }
		  }
		else if (submode.equals("CONNECTING LINE"))
		  {
		    if (event_counter == 1)
		      {
		        add_button.drawSubOptionMessage1(2,g);
		      }
		    else
		      {
	                add_button.drawSubOptionMessage2(2,g);
		      }
		  }
	      }
	  }
	else if (mode.equals("EDIT"))
          {
	    if (!is_disabled(1)) {move_button.draw(g,true);}
	    if (!is_disabled(2)) {add_button.draw(g,true);}
	    if (!is_disabled(10)) {view_button.draw(g,true);}
	    if (!is_disabled(13)) {save_button.draw(g,true);}
	    if (!is_disabled(16)) {grade_button.draw(g,true);}
	    
	    if (submode.equals(""))
              {
		edit_button.draw(g,false);
		edit_button.drawPopOut(g);
		edit_button.drawPopOutMessage(g);
	      }
	    else
              {
		edit_button.draw_with_blerb(g,false,submode);
		if (submode.equals("DELETE WORD"))
		  {
	            edit_button.drawSubOptionMessage1(0,g);
		  }
		else if (submode.equals("DELETE LINES"))
		  {
	            edit_button.drawSubOptionMessage1(1,g);
		  }
		else if (submode.equals("EDIT WORD"))
		  {
		    if (event_counter == 2)
		      {
			edit_button.drawSubOptionMessage2(2,g);	
			this.add(text_entry_box);
			text_entry_box.setEditable(true);
			if (text_entry_box.getText().length() == 0)
			  {
			    text_entry_box.setText(words[0].word);
			  }
			text_entry_box.setVisible(true);
			if (words[0].word_type.equals("CONCEPT"))
			  {
			    g.setColor(MoveableWord.conceptword_bg);
			  }
			else
			  {
			    g.setColor(MoveableWord.linkingword_bg);
			  }
			g.fillRect(0,top_space+160,button_width,100);
			if (words[0].word_type.equals("CONCEPT"))
			  {
			    g.setColor(MoveableWord.conceptword_fg);
			  }
			else
			  {
			    g.setColor(MoveableWord.linkingword_fg);
			  }
			g.setFont(font_bmessage);
			g.drawString("Edit Word",10,top_space+175);
			text_entry_button.changeText("alter word");
			text_entry_button.draw(g,true);
			event_counter = 3;
		      }
		    else if (event_counter == 3)
		      {
			if (words[0].word_type.equals("CONCEPT"))
			  {
			    g.setColor(MoveableWord.conceptword_bg);
			  }
			else
			  {
			    g.setColor(MoveableWord.linkingword_bg);
			  }
			g.fillRect(0,top_space+160,button_width,100);
			if (words[0].word_type.equals("CONCEPT"))
			  {
			    g.setColor(MoveableWord.conceptword_fg);
			  }
			else
			  {
			    g.setColor(MoveableWord.linkingword_fg);
			  }
			g.setFont(font_concept);
			g.drawString("Edit Word",10,top_space+175);
			text_entry_button.draw(g,true);
			edit_button.drawSubOptionMessage2(2,g);
		      }
		    else
		      {
			edit_button.drawSubOptionMessage1(2,g);
		      }
		  }
	      }
	  }
	else if (mode.equals("VIEW"))
	  {
	    if (!is_disabled(1)) {move_button.draw(g,true);}
	    if (!is_disabled(2)) {add_button.draw(g,true);}
	    if (!is_disabled(7)) {edit_button.draw(g,true);}
	    if (!is_disabled(13)) {save_button.draw(g,true);}
	    if (!is_disabled(16)) {grade_button.draw(g,true);}

	    if (submode.equals(""))
	      {
		view_button.draw(g,false);
		view_button.drawPopOut(g);
		view_button.drawPopOutMessage(g);
	      }
	    else
	      {
		view_button.draw_with_blerb(g,false,submode);
		if (
		    submode.equals("EXPORT GRAPHIC") ||
		    submode.equals("EXPORT ROTATEGRAPHIC")
		    )
		  {
	            view_button.drawSubOptionMessage1(0,g);
		    try
		      {
			String data = new String();
			String winfo = new String();

			if (submode.equals("EXPORT ROTATEGRAPHIC"))
			  {
			    if (!color)
			      {
			        data += "custom=colormode:gray,rotate:1&";
			      }
			    else
			      {
			        data += "custom=colormode:color,rotate:1&";
			      }
			  }
			else
			  {
			    if (!color)
			      {
			        data += "custom=colormode:gray,rotate:0&";
			      }
			    else
			      {
			        data += "custom=colormode:color,rotate:0&";
			      }
			  }

			data += "command=GRAPHIC&";
			for (int j = 0; j < number_links; j++)
			  {
			    data += "c"+j+"="+
				links[j].getIndex1()+"+"+
				links[j].getIndex2()+"&";
			  }
			for (int i = number_words - 1; i >= 0; i--)
			  {
			    // Only redraw words that exist inside the
			    // clipping region.
			    if (words[i].word_type.equals("LINKINGWORD"))
			      {
				winfo = words[i].info(g)+"+n";
			      }
			    else
			      {
				winfo = words[i].info(g) + "+w";
			      }
			    data += "w" + i + "=" + winfo + "&";
			  }
			if (disable_string != null)
			  {
			    data += "DISABLE="+disable_string;
			  }
			if (disable_string != null && gallery != null)
			  {
			    data += "&gallery="+gallery;
			  }

			// Authentication data for the CGI/Servlet.
			data += "&mapname="+mapname;
			data += "&expiration_key="+expiration_key;
			data += "&sid="+sid; // Cannot trust cookie data to
			                     // be available from applet.

			// CGI/Servlet uniform resource locator.
			URL url = new URL(document_base+
					  "/ConceptServerScript.cgi?action=");

			// Communicate request to server.
			server_talker.put(url,data);

			// Output the graphic page to
			// a new browser window.
			ac.showDocument(url,new String("_blank"));
		      }
		    catch (MalformedURLException me)
		      {
			System.err.println("MalformedURLException: " + me);
		      }
		    catch (IOException e)
		      {
			System.out.println(
				    "unsuccessful attempt at saving data" + e);
		      }
		    submode = ""; 
		    if (!is_disabled(1)) {mode = "MOVE";} else {mode = "";}
		  }
		else if (submode.equals("TOGGLE COLOR"))
		  {
	            view_button.drawSubOptionMessage1(1,g);
		    submode = "";
		    if (!is_disabled(1)) {mode = "MOVE";} else {mode = "";}
		  }
		else if (submode.equals("More Options"))
		  {
	            view_button.drawSubOptionMessage1(1,g);
		    submode = "";
		    mode = "VIEW";
		  }
		else if (submode.equals("Fewer Options"))
		  {
	            view_button.drawSubOptionMessage1(1,g);
		    submode = "";
		    mode = "VIEW";
		  }
		else if (
			 submode.equals("SMALL") ||
			 submode.equals("MEDIUM") ||
			 submode.equals("LARGE") ||
			 submode.equals("480x300") ||
			 submode.equals("768x480") ||
			 submode.equals("960x600") ||
			 submode.equals("1119x669") ||
			 submode.equals("1282x801") ||
			 submode.equals("1440x900")
			 )
		  {
		    // In this submode, notify user that saving is beginning,
		    // and advance to the next submode of saving (SAVE ENACT).
		      
		    // Set this true to force multiple passes through
		    // this function (necessary since SAVE involves
		    // automated displaying).
		    mode_cycle = true;

		    // Determine the map space background color.
		    if (color == true)
		      {
			g.setColor(Background_Color);
		      }
		    else
		      {
			g.setColor(Background_Gray);
		      }

		    // Draw map space (boundaried subspace in applet space).
		    g.fillRect(left_space, top_space,
			       space_width, space_height);

		    if (color == true)
		      {
			g.setColor(Entry_Bg_Color);
		      }
		    else
		      {
			g.setColor(Entry_Bg_Gray);
		      }

		    g.setFont(font_banner); // Set font.
		    g.drawString(resize_banner_text,
				 left_space+20,
				 top_space+80); // Draw text string.

		    submode = submode+" csENACT";
		  }
		else if (
			 submode.equals(" +3 ") ||
			 submode.equals(" +2 ") ||
			 submode.equals(" +1 ") ||
			 submode.equals(" default ") ||
			 submode.equals(" -1 ")
			 )
		  {
		    // In this submode, notify user that saving is beginning,
		    // and advance to the next submode of saving (SAVE ENACT).
		      
		    // Set this true to force multiple passes through
		    // this function (necessary since SAVE involves
		    // automated displaying).
		    mode_cycle = true;

		    // Determine the map space background color.
		    if (color == true)
		      {
			g.setColor(Background_Color);
		      }
		    else
		      {
			g.setColor(Background_Gray);
		      }

		    // Draw map space (boundaried subspace in applet space).
		    g.fillRect(left_space, top_space,
			       space_width, space_height);

		    if (color == true)
		      {
			g.setColor(Entry_Bg_Color);
		      }
		    else
		      {
			g.setColor(Entry_Bg_Gray);
		      }

		    g.setFont(font_banner); // Set font.
		    g.drawString(resize_banner_text,
				 left_space+20,
				 top_space+80); // Draw text string.

		    submode = submode+"ENACT";
		  }
		else if (submode.indexOf("csENACT",0) != -1)
		  {
		    // Parse out the specified resize dimensions.
		    int csi = submode.indexOf(" csENACT",0);
		    String csstring = new String();
		    csstring = submode.substring(0,csi);

		    // Convert basic size tags into pixel dimensions.
		    if (csstring.equals("SMALL"))
		      {
			csstring = "480x300";
		      }
		    else if (csstring.equals("MEDIUM"))
		      {
			csstring = "768x480";
		      }
		    else if (csstring.equals("LARGE"))
		      {
			csstring = "960x600";
		      }

		    try
		      {
			// Holds arguments to CGI post to URI.
			String data = new String();

			// Used to construct information about each "word".
			String winfo = new String();
			
			data += "command=RESIZE&";
			for (int j = 0; j < number_links; j++)
			  {
			    data += "c"+j+"="+
				links[j].getIndex1()+"+"+
				links[j].getIndex2()+"&";
			  }
			for (int i = number_words - 1; i >= 0; i--)
			  {
			    // Only redraw words that exist inside the
			    // clipping region.
			    if (words[i].word_type.equals("LINKINGWORD"))
			      {
				winfo = words[i].info(g)+"+n";
			      }
			    else
			      {
				winfo = words[i].info(g) + "+w";
			      }
			    data += "w" + i + "=" + winfo + "&";
			  }
			if (disable_string != null)
			  {
			    data += "DISABLE="+disable_string;
			  }
			if (disable_string != null && gallery != null)
			  {
			    data += "&gallery="+gallery;
			  }

			// Authentication data for the CGI/Servlet.
			data += "&canvassize="+csstring;
			data += "&fontsize= "+fontsize_string;
			data += "&mapname="+mapname;
			data += "&expiration_key="+expiration_key;
			data += "&sid="+sid; // Cannot trust cookie data to
			// be available from applet.
			
			// CGI/Servlet uniform resource locator.
			URL url = new URL(document_base+
					  "/ConceptServerScript.cgi?action=");
		    
			server_talker.put(url,data);

			// The "official" url connection object.
			ac.showDocument(url);
		      }
		    catch (MalformedURLException me)
		      {
			System.err.println("MalformedURLException: " + me);
		      }
		    catch (IOException e)
		      {
			System.out.println(
					   "unsuccessful attempt at "+
					   "saving data"+e);
		      }


		    submode=""; 
		    save_button.drawSubOptionMessage2(0,g);
		    if (!is_disabled(1)) {mode = "MOVE";} else {mode = "";}
		  }
		else if (submode.indexOf("ENACT",0) != -1)
		  {
		    String fs1 = new String(submode);
		    String fs2 = new String(submode);
		    String fa = new String();
		    String fb = new String();
		    fa = fs1.substring(1,2);
		    fb = fs2.substring(2,3);
		    //		    System.out.println("submodeS1: ["+fa+"]");
		    //		    System.out.println("submodeS2: ["+fb+"]");
		    if (fa.equals("+"))
			{
			    fa = "P";
			}
		    else if (fa.equals("-"))
			{
			    fa = "N";
			}
		    else
			{
			    fa = "default";
			    fb = "";
			}
		    try
		      {
			String data = new String();
			String winfo = new String();
			
			data += "command=RESIZE&";
			for (int j = 0; j < number_links; j++)
			  {
			    data += "c"+j+"="+
				links[j].getIndex1()+"+"+
				links[j].getIndex2()+"&";
			  }
			for (int i = number_words - 1; i >= 0; i--)
			  {
			    // Only redraw words that exist inside the
			    // clipping region.
			    if (words[i].word_type.equals("LINKINGWORD"))
			      {
				winfo = words[i].info(g)+"+n";
			      }
			    else
			      {
				winfo = words[i].info(g) + "+w";
			      }
			    data += "w" + i + "=" + winfo + "&";
			  }
			if (disable_string != null)
			  {
			    data += "DISABLE="+disable_string;
			  }
			if (disable_string != null && gallery != null)
			  {
			    data += "&gallery="+gallery;
			  }

			// Authentication data for the CGI/Servlet.
			data += "&canvassize="+canvassize_string;
			data += "&fontsize= "+fa+fb+" ";
			data += "&mapname="+mapname;
			data += "&expiration_key="+expiration_key;
			data += "&sid="+sid; // Cannot trust cookie data to
			// be available from applet.
			
			// CGI/Servlet uniform resource locator.
			URL url = new URL(document_base+
					  "/ConceptServerScript.cgi?action=");
		    
			server_talker.put(url,data);

			// The "official" url connection object.
			// If the user tries to save an applet outside
			// of user authentication, the page needs to
			// be reloaded (and the CGI servlet layer
			// subsequently takes the user through a
			// login or registration process prior to
			// the save procedure).
			if (expiration_key.equals("NA"))
			  {
			    ac.showDocument(url);
			  }
		      }
		    catch (MalformedURLException me)
		      {
			System.err.println("MalformedURLException: " + me);
		      }
		    catch (IOException e)
		      {
			System.out.println(
					   "unsuccessful attempt at "+
					   "saving data"+e);
		      }
		    submode=""; 
		    save_button.drawSubOptionMessage2(0,g);
		    if (!is_disabled(1)) {mode = "MOVE";} else {mode = "";}
		  }
		else if (submode.indexOf("resize",0) != -1)
		  {
	            view_button.drawSubOptionMessage1(2,g);
		    submode = "";
		    if (!is_disabled(1)) {mode = "MOVE";} else {mode = "";}
		  }
		else if (submode.indexOf(" ",0) != -1)
		  {
	            view_button.drawSubOptionMessage1(2,g);
		    submode = "";
		    if (!is_disabled(1)) {mode = "MOVE";} else {mode = "";}
		  }
	      }
	  }
	else if (mode.equals("SAVE"))
	  {
	    if (!is_disabled(1)) {move_button.draw(g,true);}
	    if (!is_disabled(2)) {add_button.draw(g,true);}
	    if (!is_disabled(7)) {edit_button.draw(g,true);}
	    if (!is_disabled(10)) {view_button.draw(g,true);}
	    if (!is_disabled(16)) {grade_button.draw(g,true);}

	    if (submode.equals(""))
	      {
		save_button.draw(g,false);
		save_button.drawPopOut(g);
		save_button.drawPopOutMessage(g);
	      }
	    else
	      {
		save_button.draw_with_blerb(g,false,submode);
		if (submode.equals("SAVE NOW"))
		  {
		    // In this submode, notify user that saving is beginning,
		    // and advance to the next submode of saving (SAVE ENACT).

		    // Set this true to force multiple passes through
		    // this function (necessary since SAVE involves
		    // automated displaying).
		    mode_cycle = true;

		    // Determine the map space background color.
		    if (color == true)
		      {
			g.setColor(Background_Color);
		      }
		    else
		      {
			g.setColor(Background_Gray);
		      }

		    // Draw map space (boundaried subspace in applet space).
		    g.fillRect(left_space, top_space,
			       space_width, space_height);

		    if (color == true)
		      {
			g.setColor(Entry_Bg_Color);
		      }
		    else
		      {
			g.setColor(Entry_Bg_Gray);
		      }

		    g.setFont(font_banner); // Set font.
		    g.drawString(save_banner_text,
				 left_space+20,
				 top_space+80); // Draw text string.

	            save_button.drawSubOptionMessage1(0,g);
		    submode = "SAVE ENACT";
		  }
		else if (submode.equals("SAVE ENACT"))
		  {
		    try
		      {
			String data = new String();
			String winfo = new String();
			    
			data += "command=NOW&";
			for (int j = 0; j < number_links; j++)
			  {
			    data += "c"+j+"="+
				links[j].getIndex1()+"+"+
				links[j].getIndex2()+"&";
			  }
			for (int i = number_words - 1; i >= 0; i--)
			  {
			    // Only redraw words that exist inside the
			    // clipping region.
			    if (words[i].word_type.equals("LINKINGWORD"))
			      {
				winfo = words[i].info(g)+"+n";
			      }
			    else
			      {
				winfo = words[i].info(g) + "+w";
			      }
			    data += "w" + i + "=" + winfo + "&";
			  }
			if (disable_string != null)
			  {
			    data += "DISABLE="+disable_string;
			  }
			if (disable_string != null && gallery != null)
			  {
			    data += "&gallery="+gallery;
			  }

			// Authentication data for the CGI/Servlet.
			data += "&mapname="+mapname;
			data += "&expiration_key="+expiration_key;
			data += "&sid="+sid; // Cannot trust cookie data to
			                     // be available from applet.

			// CGI/Servlet uniform resource locator.
			URL url = new URL(document_base+
					  "/ConceptServerScript.cgi?action=");

			server_talker.put(url,data);

			// The "official" url connection object.
			// If the user tries to save an applet outside
			// of user authentication, the page needs to
			// be reloaded (and the CGI servlet layer
			// subsequently takes the user through a
			// login or registration process prior to
			// the save procedure).
			if (expiration_key.equals("NA"))
			  {
			    ac.showDocument(url);
			  }
		      }
		    catch (MalformedURLException me)
		      {
			System.err.println("MalformedURLException: " + me);
		      }
		    catch (IOException e)
		      {
			System.out.println(
				    "unsuccessful attempt at saving data" + e);
		      }
		    submode=""; 
	            save_button.drawSubOptionMessage2(0,g);
		    if (!is_disabled(1)) {mode = "MOVE";} else {mode = "";}
		  }
		else if (submode.equals("EXPORT DATA"))
		  {
	            save_button.drawSubOptionMessage1(1,g);
		    try
		      {
			String data = new String();
			String winfo = new String();
			    
			data += "command=EXPORT&";
			for (int j = 0; j < number_links; j++)
			  {
			    data+="c"+j+"="+
				links[j].getIndex1()+"+"+
				links[j].getIndex2()+"&";
			  }
			for (int i = number_words - 1; i >= 0; i--)
			  {
	       // Only redraw the word if it exists inside the clipping region.
			    if (words[i].word_type.equals("LINKINGWORD"))
			      {
				winfo = words[i].info(g)+"+n";
			      }
			    else
			      {
				winfo = words[i].info(g)+"+w";
			      }
			    data += "w"+i+"="+winfo+"&";
			  }
			if (disable_string != null)
			  {
			    data += "DISABLE="+disable_string;
			  }
			URL url = new URL(
		    "http://hobbes.lite.msu.edu/concept/CC_CGI/CC_Server.cgi?"+
		    data);
         // URL url=new URL(getDocumentBase(),"../CC_CGI/CC_Server.cgi?"+data);
			ac.showDocument(url,new String("_blank"));
		      }
		    catch (MalformedURLException me)
		      {
			System.err.println("MalformedURLException: " + me);
		      }
		    catch (Exception e)
		      {
		System.out.println("unsuccessful invocation of making GIF");
		      }
		    submode="";
		    if (!is_disabled(1)) {mode="MOVE";} else {mode="";}
		  }
	      }
	  }
	else if (mode.equals("GRADE"))
	  {
	    if (!is_disabled(1)) {move_button.draw(g,true);}
	    if (!is_disabled(2)) {add_button.draw(g,true);}
	    if (!is_disabled(7)) {edit_button.draw(g,true);}
	    if (!is_disabled(10)) {view_button.draw(g,true);}
	    if (!is_disabled(13)) {save_button.draw(g,true);}

	    if (submode.equals(""))
	      {
		grade_button.draw(g,false);
		grade_button.drawPopOut(g);
		grade_button.drawPopOutMessage(g);
	      }
	    else
	      {
		grade_button.draw_with_blerb(g,false,submode);
		if (submode.equals("SUBMIT"))
		  {
	            grade_button.drawSubOptionMessage1(0,g);
		    try
		      {
			String data = new String();
			String winfo = new String();
			
			data += "command=SUBMITNOW&gallery="+gallery+"&";
			for (int j = 0; j < number_links; j++)
			  {
			    data += "c"+j+"="+
				links[j].getIndex1()+"+"+
				links[j].getIndex2()+"&";
			  }
			for (int i = number_words - 1; i >= 0; i--)
			  {
			    // Only redraw words that exist inside
			    // clipping region.
			    if (words[i].word_type.equals("LINKINGWORD"))
			      {
				winfo = words[i].info(g)+"+n";
			      }
			    else
			      {
				winfo = words[i].info(g)+"+w";
			      }
			    data += "w"+i+"="+winfo+"&";
			  }
			if (disable_string != null)
			  {
			    data += "DISABLE="+disable_string;
			  }

			// Authentication data for the CGI/Servlet.
			data += "&mapname="+mapname;
			data += "&expiration_key="+expiration_key;
			data += "&sid="+sid; // Cannot trust cookie data to
			                     // be available from applet.

			// CGI/Servlet uniform resource locator.
			//			URL url = new URL(document_base+
			//		  "/ConceptServerScript.cgi?action=&testval=123");
			URL url = new URL(document_base+
					  "/ConceptServerScript.cgi?action=");

			// Communicate request to server.
			server_talker.put(url,data);

			// Output a response page to
			// the same browser window.
			ac.showDocument(url);
		      }
		    catch (MalformedURLException me)
		      {
			System.err.println("MalformedURLException: " + me);
		      }
		    catch (Exception e)
		      {
			System.out.println(
				    "unsuccessful invocation of making image");
		      }
		    submode = ""; 
		    if (!is_disabled(1)) {mode = "MOVE";} else {mode = "";}
		  }
		else if (submode.equals("SHOW ROBOGRADER"))
		  {
		    // In this submode, notify user that saving is beginning,
		    // and advance to the next submode of saving (SAVE ENACT).

		    // Set this true to force multiple passes through
		    // this function (necessary since SAVE involves
		    // automated displaying).
		    mode_cycle = true;

		    // Determine the map space background color.
		    if (color == true)
		      {
			g.setColor(Background_Color);
		      }
		    else
		      {
			g.setColor(Background_Gray);
		      }

		    // Draw map space (boundaried subspace in applet space).
		    g.fillRect(left_space, top_space,
			       space_width, space_height);

		    if (color == true)
		      {
			g.setColor(Entry_Bg_Color);
		      }
		    else
		      {
			g.setColor(Entry_Bg_Gray);
		      }

		    g.setFont(font_banner); // Set font.
		    g.drawString(robograder_banner_text,
				 left_space+20,
				 top_space+80); // Draw text string.

	            save_button.drawSubOptionMessage1(0,g);
		    submode = "ENACT ROBOGRADER";
		  }
		else if (submode.equals("ENACT ROBOGRADER"))
		  {
		    try
		      {
			String data = new String();
			String winfo = new String();
			    
			data += "command=NOW&";
			for (int j = 0; j < number_links; j++)
			  {
			    data += "c"+j+"="+
				links[j].getIndex1()+"+"+
				links[j].getIndex2()+"&";
			  }
			for (int i = number_words - 1; i >= 0; i--)
			  {
			    // Only redraw words that exist inside the
			    // clipping region.
			    if (words[i].word_type.equals("LINKINGWORD"))
			      {
				winfo = words[i].info(g)+"+n";
			      }
			    else
			      {
				winfo = words[i].info(g) + "+w";
			      }
			    data += "w" + i + "=" + winfo + "&";
			  }
			if (disable_string != null)
			  {
			    data += "DISABLE="+disable_string;
			  }
			if (disable_string != null && gallery != null)
			  {
			    data += "&gallery="+gallery;
			  }

			// Authentication data for the CGI/Servlet.
			data += "&mapname="+mapname;
			data += "&expiration_key="+expiration_key;
			data += "&sid="+sid; // Cannot trust cookie data to
			                     // be available from applet.

			// CGI/Servlet uniform resource locator.
			URL url = new URL(document_base+
					  "/robograder.cgi?action=");

			BufferedReader br = 
			    server_talker.put_and_get(url,data);

			// Variable that holds data returned from servlet.
			String receive_data = null;

			int string_index;
			String element_string;
			String idx_string;
			String value_string;
			int idx;
			int value;
			robo.clear_tables();
			while ( (receive_data = br.readLine()) != null)
			  {
			      try {
			    string_index = receive_data.indexOf(" ",0);
			    element_string = receive_data.substring(0,1);
			    idx_string =
				receive_data.substring(1,string_index);
				value_string =
				    receive_data.substring(string_index+1,
							receive_data.length());
				/*				System.out.println("VALS:'"
					       +idx_string+"' '"+value_string+
					       "'");*/
			    idx = Integer.parseInt(idx_string);
			    value = Integer.parseInt(value_string);
			    if (element_string.equals("w"))
			      {
				robo.word_table(idx,value);
			      }
			    else if (element_string.equals("l"))
			      {
				robo.link_table(idx,value);
			      }
			      }
			      catch (Exception e) {}
			  }

			// If the user tries to save an applet outside
			// of user authentication, the page needs to
			// be reloaded (and the CGI servlet layer
			// subsequently takes the user through a
			// login or registration process prior to
			// the save procedure).
			/*
			if (expiration_key.equals("NA")) {
			    getAppletContext().showDocument(url);
			}
			*/

		      }
		    catch (MalformedURLException me)
		      {
			System.err.println("MalformedURLException: " + me);
		      }
		    catch (IOException e)
		      {
			System.out.println(
				    "unsuccessful attempt at saving data" + e);
		      }
		    g.setColor(Color.black);
		    g.setFont(small_font_button);
		    /*
		    g.drawString("ROBOGRADER",5,top_space+175);
		    g.drawString("NOT YET",5,top_space+190);
		    g.drawString("IMPLEMENTED",5,top_space+205);
		    */
		    g.drawString("ROBOGRADER",5,top_space+220);
		    /*
		    g.drawString("NOT YET",5,top_space+235);
		    g.drawString("IMPLEMENTED",5,top_space+250);
		    */
		    // if (!is_disabled(1)) {mode="MOVE";} else {mode="";}
		  }
	      }
	  }

	// Disable the text entry box if the applet is not in add or edit mode.
	if (!(mode.equals("ADD") || mode.equals("EDIT")) ||

	    ((mode.equals("ADD") &&
	     !(submode.equals("CONCEPT WORD") ||
	       submode.equals("LINKING WORD"))) &&
	     text_entry_box.isEditable()) ||

	    ((mode.equals("EDIT") &&
	     !(submode.equals("EDIT WORD") &&
	     event_counter != 1) &&
	     text_entry_box.isEditable())
	     )
	    )
	  {
	    text_entry_box.setText("");
	    text_entry_box.setEditable(false);
	    text_entry_box.setVisible(false);
	    this.remove(text_entry_box);
	    if (color == true)
	      {
		g.setColor(Entry_Bg_Color);
	      }
	    else
	      {
		g.setColor(Entry_Bg_Gray);
	      }
	    g.drawRect(0,top_space+160,left_space-1,100);
	    // 0,top_space+190,button_width,35
	  }
	
	// A brief description of the software inside the bottom applet space.
	if (color == true)
	  {
	    g.setColor(Footer_Fg_Color);
	  }
	else
	  {
	    g.setColor(Footer_Fg_Gray);
	  }
	g.setFont(font_message);
	g.drawString("C-TOOLS - Copyright 2001-2007 Michigan State University"+
		     " Board of Trustees",
		     left_space+10,top_space+space_height+15);
      }
    // END push_information_everywhere

    /**
     * Coordinates push_information_everywhere invocation.
     * Standard applet method.  Should try and use screen buffer if available.
     * This method invokes the push_information_everywhere method.
     * (push_information_everywhere combines painting with a number of other
     * network and internal state transactions). */
    public void paint(Graphics g)
      {
	if (temp_screen != null && 
	    !(mode.equals("ADD") &&
	    (submode.equals("CONCEPT WORD") || submode.equals("LINKING WORD")))
	    &&
	    !(mode.equals("EDIT") &&
	    (submode.equals("EDIT WORD")))
	    )
	  {
	    // Can use buffer.
	    push_information_everywhere(temp_screen, g.getClipBounds());
	    g.drawImage(temp_screen_image, 0, 0, this);
	    if (mode_cycle)
	      {
		push_information_everywhere(temp_screen, g.getClipBounds());
		g.drawImage(temp_screen_image, 0, 0, this);
		push_information_everywhere(temp_screen, g.getClipBounds());
		g.drawImage(temp_screen_image, 0, 0, this);
	      }
	  }
	else
	  {
	    // Cannot use buffer.
	    push_information_everywhere(g, g.getClipBounds());
	    if (mode_cycle)
	      {
		push_information_everywhere(g, g.getClipBounds());
		push_information_everywhere(g, g.getClipBounds());
	      }
	  }
      }
    // END paint

    /**
     * Cleans up memory.
     * Standard applet method.  Dispose of buffered screen memory if it exists.
     */
    public void destroy()
      {
	if (temp_screen != null)
	  {
	    temp_screen.dispose(); // Dispose of buffered screen memory.
	  }
      }
    // END destroy

    /**
     * Whenever the applet needs to update.
     * Standard applet method.  Simply call the paint method.
     */
    public void update(Graphics g)
      {
	paint(g);
      }
    // END update

    /**
     * Whenever an event occurs for an interface object.
     * ActionListener method.  Currently, no events for any objects
     * are handled, since there are a few browser compatibility issues
     * with AWT object events.
     */
    public void actionPerformed(ActionEvent event)
      {
	String action_command = event.getActionCommand();
	return; // If an event occurred for an unknown AWT object.
      }

    public void mouseMoved(MouseEvent e) {}

    /**
     * What to do when mouse is in motion.
     * Note: selected areas of the applet are redrawn only when the interface
     * is in "MOVE" mode.
     */
    public void mouseDragged(MouseEvent e)
      {
	// Where is the mouse?
	int x = e.getX(); // x coordinate of mouse.
	int y = e.getY(); // y coordinate of mouse.
	// If a word is being moved around, then interactively repaint the
	// canvas.
	if (selected_word && mode.equals("MOVE"))
	  {
	    repaint (words[0].X, words[0].Y, words[0].width, words[0].height);
	    words[0].X = Math.max (left_space+1, Math.min (x - words[0].dx,
			 left_space+space_width - 1 - words[0].width));
	    words[0].Y = Math.max (top_space+1, Math.min (y - words[0].dy,
			 top_space+space_height - 1 - words[0].height));
	    words[0].set_center();
	    repaint (words[0].X, words[0].Y, words[0].width, words[0].height);
	  }
	else if (selected_image && mode.equals("MOVE"))
	  {
	    repaint (image_x,image_y,
		     image_width,image_height);

	    image_x = Math.max(left_space+1,
			       Math.min(left_space+space_width-1-image_width,
					x)
			       );

	    image_y = 
		Math.max(top_space+1,
			 Math.min(top_space+space_height-image_height-1,
				  y)
			 );

	    repaint (image_x,image_y,
		     image_width,image_height);
	  }
	return;
      }
    // END mouseDragged

    /**
     * Nothing happens.
     */
    public void mouseClicked(MouseEvent e)
      {
	// System.out.println("mouse clicked");
      }
    // END mouseClicked

    /**
     * Nothing happens.
     */
    public void mouseEntered(MouseEvent e)
      {
	// System.out.println("mouse entered");
      }
    // END mouseEntered

    /**
     * Nothing happens.
     */
    public void mouseExited(MouseEvent e)
      {
	// System.out.println("mouse exited");
      }
    // END mouseExited

    /**
     * What to do when mouse button is released.
     * Note: redraw the entire applet.  Also, record that no word is
     * selected.
     */
    public void mouseReleased (MouseEvent e)
      {
	// Where is the mouse?
	int x = e.getX(); // x coordinate of mouse.
	int y = e.getY(); // y coordinate of mouse.
	//System.out.println("DEBUG mouse released");
	mousedown = false; // Record action (the mouse button is unpressed).
	// Area-specific redrawing (deprecated).
	// repaint(left_space,0,space_width+right_space,applet_height);
	//	repaint(0,0,left_space,top_space+125);
	repaint(0,0,applet_width,applet_height); // Repaint entire applet.
       	// If a word is being moved, the submode should be blank.
	if (mode.equals("MOVE"))
	  {
	    submode = "";
	  }

	// Are they dragging and dropping onto a link?
	if (selected_word)
	  {
	    for (int j = 0; j < number_links; j++)
	      {
		if (links[j].getTargetArea().hit_query(x,y))
		  {
		    int temp_index2 = links[j].getIndex2();
		    // If not linking to same word (otherwise,
		    // drag-and-dropping produces many self-referential
		    // links.
		    if (
			(temp_index2 != 0) &&
			(links[j].getIndex1() != 0)
			)
		      {
			links[j].setValue(links[j].getIndex1(),0);
			links[number_links].setValue(0,temp_index2);
			number_links++;
		      }
		  }
	      }
	  }

	selected_word = false; // Record action (a word is not selected).

	selected_image = false;

	return;
      }
    // END mouseReleased

    /**
     * What to do when mouse button is pressed.
     * Note: determine the object that was hit based upon the mouse pointer
     * coordinates.  Based on the number of possibilities, this is a lengthy
     * method.
     */
    public void mousePressed(MouseEvent e)
      {
      // ---------------------------------------------------- Method variables.
	// Where is the mouse?
	int x = e.getX(); // x coordinate of mouse.
	int y = e.getY(); // y coordinate of mouse.

	int j2; // Additional loop iterator.

	MoveableWord temp; // For swapping (when resorting the words list).
	int templink_idx1; // Temporary link, index #1.
	int templink_idx2; // Temporary link, index #2.

	int current_word = 0; // Current word; index of the array "words".

	mousedown = true; // Record action.

	// What menu or action button, if any, was selected.
	// The y coordinate is evaluated for its position in
	// "button_height" units to determine the menu button that
	// was pressed.

	// "add to map" action button?

	if ((mode.equals("ADD")) && 
	    (submode.equals("CONCEPT WORD") || submode.equals("LINKING WORD"))
	    && text_entry_button.getTargetArea().hit_query(x,y))
	  {
	    int row_place = top_space+(int)(space_height/2);
	    int col_place = left_space;
	    int col_offset = (int)((space_width-50)/5);
	    int row1yA;
	    int row1yB;
	    int row2yA;
	    int row2yB;
	    
	    MoveableWord word2add = new
		MoveableWord(new
			     String(text_entry_box.getText()),
			     "CONCEPT");
	      
	    row1yA = row_place-word2add.height-5;
	    row1yB = row_place-5;
	    row2yA = row_place+5;
	    row2yB = row_place+word2add.height+5;

	    int col1yA = col_place+col_offset*(1-1);
	    int col2yA = col_place+col_offset*(2-1);
	    int col3yA = col_place+col_offset*(3-1);
	    int col4yA = col_place+col_offset*(4-1);
	    int col5yA = col_place+col_offset*(5-1);

	    int Xnewloc = left_space+space_width-100; // Pot. X loc, new word.

	    // Potential Y location for new word.
	    int Ynewloc1 = row1yA;
	    int Ynewloc2 = row2yA;

	    int Ynewloc = Ynewloc1;
	    
	    int rowtry = 0;
	    int coltry1 = 0;
	    int coltry2 = 0;
	    int coltry3 = 0;
	    int coltry4 = 0;
	    int coltry5 = 0;

	    if (number_words < 100)
	      {
		  //		while (coltry < 100)
		  {
		    j2 = number_words-1;
		    while(j2 >= 0) // Run through list of words.
		      {
			if
			   (
			    (
			     (words[j2].X>=col1yA) &&
			     (words[j2].X<=
			      (col1yA+col_offset))
			     )
			    ||
			    (
			     ((words[j2].X+words[j2].width)>=col1yA) &&
			     ((words[j2].X+words[j2].width)<=
			      (col1yA+col_offset))
			     )
			    )
			  {
			if (
			    (
			     (words[j2].Y>=row1yA) &&
			     (words[j2].Y<=
			      (row1yA+word2add.height))
			     )
			    ||
			    (
			     ((words[j2].Y+words[j2].height)>=row1yA) &&
			     ((words[j2].Y+words[j2].height)<=
			      (row1yA+word2add.height))
			     )
			    )
			  {
			    coltry1++;
			    rowtry--;
			  }
			if
			   (
			    (
			     (words[j2].Y>=row2yA) &&
			     (words[j2].Y<=
			      (row2yA+word2add.height))
			     )
			    ||
			    (
			     ((words[j2].Y+words[j2].height)>=row2yA) &&
			     ((words[j2].Y+words[j2].height)<=
			      (row2yA+word2add.height))
			     )
			    )
			  {
			    coltry1++;
			    rowtry++;
			  }
			  }
			if
			   (
			    (
			     (words[j2].X>=col2yA) &&
			     (words[j2].X<=
			      (col2yA+col_offset))
			     )
			    ||
			    (
			     ((words[j2].X+words[j2].width)>=col2yA) &&
			     ((words[j2].X+words[j2].width)<=
			      (col2yA+col_offset))
			     )
			    )
			  {
			if (
			    (
			     (words[j2].Y>=row1yA) &&
			     (words[j2].Y<=
			      (row1yA+word2add.height))
			     )
			    ||
			    (
			     ((words[j2].Y+words[j2].height)>=row1yA) &&
			     ((words[j2].Y+words[j2].height)<=
			      (row1yA+word2add.height))
			     )
			    )
			  {
			    coltry2++;
			    rowtry--;
			  }
			if
			   (
			    (
			     (words[j2].Y>=row2yA) &&
			     (words[j2].Y<=
			      (row2yA+word2add.height))
			     )
			    ||
			    (
			     ((words[j2].Y+words[j2].height)>=row2yA) &&
			     ((words[j2].Y+words[j2].height)<=
			      (row2yA+word2add.height))
			     )
			    )
			  {
			    coltry2++;
			    rowtry++;
			  }
			  }
			if
			   (
			    (
			     (words[j2].X>=col3yA) &&
			     (words[j2].X<=
			      (col3yA+col_offset))
			     )
			    ||
			    (
			     ((words[j2].X+words[j2].width)>=col3yA) &&
			     ((words[j2].X+words[j2].width)<=
			      (col3yA+col_offset))
			     )
			    )
			  {
			if (
			    (
			     (words[j2].Y>=row1yA) &&
			     (words[j2].Y<=
			      (row1yA+word2add.height))
			     )
			    ||
			    (
			     ((words[j2].Y+words[j2].height)>=row1yA) &&
			     ((words[j2].Y+words[j2].height)<=
			      (row1yA+word2add.height))
			     )
			    )
			  {
			    coltry3++;
			    rowtry--;
			  }
			if
			   (
			    (
			     (words[j2].Y>=row2yA) &&
			     (words[j2].Y<=
			      (row2yA+word2add.height))
			     )
			    ||
			    (
			     ((words[j2].Y+words[j2].height)>=row2yA) &&
			     ((words[j2].Y+words[j2].height)<=
			      (row2yA+word2add.height))
			     )
			    )
			  {
			    coltry3++;
			    rowtry++;
			  }
			  }
			if
			   (
			    (
			     (words[j2].X>=col4yA) &&
			     (words[j2].X<=
			      (col4yA+col_offset))
			     )
			    ||
			    (
			     ((words[j2].X+words[j2].width)>=col4yA) &&
			     ((words[j2].X+words[j2].width)<=
			      (col4yA+col_offset))
			     )
			    )
			  {
			if (
			    (
			     (words[j2].Y>=row1yA) &&
			     (words[j2].Y<=
			      (row1yA+word2add.height))
			     )
			    ||
			    (
			     ((words[j2].Y+words[j2].height)>=row1yA) &&
			     ((words[j2].Y+words[j2].height)<=
			      (row1yA+word2add.height))
			     )
			    )
			  {
			    coltry4++;
			    rowtry--;
			  }
			if
			   (
			    (
			     (words[j2].Y>=row2yA) &&
			     (words[j2].Y<=
			      (row2yA+word2add.height))
			     )
			    ||
			    (
			     ((words[j2].Y+words[j2].height)>=row2yA) &&
			     ((words[j2].Y+words[j2].height)<=
			      (row2yA+word2add.height))
			     )
			    )
			  {
			    coltry4++;
			    rowtry++;
			  }
			  }
			if
			   (
			    (
			     (words[j2].X>=col5yA) &&
			     (words[j2].X<=
			      (col5yA+col_offset))
			     )
			    ||
			    (
			     ((words[j2].X+words[j2].width)>=col5yA) &&
			     ((words[j2].X+words[j2].width)<=
			      (col5yA+col_offset))
			     )
			    )
			  {
			if (
			    (
			     (words[j2].Y>=row1yA) &&
			     (words[j2].Y<=
			      (row1yA+word2add.height))
			     )
			    ||
			    (
			     ((words[j2].Y+words[j2].height)>=row1yA) &&
			     ((words[j2].Y+words[j2].height)<=
			      (row1yA+word2add.height))
			     )
			    )
			  {
			    coltry5++;
			    rowtry--;
			  }
			if
			   (
			    (
			     (words[j2].Y>=row2yA) &&
			     (words[j2].Y<=
			      (row2yA+word2add.height))
			     )
			    ||
			    (
			     ((words[j2].Y+words[j2].height)>=row2yA) &&
			     ((words[j2].Y+words[j2].height)<=
			      (row2yA+word2add.height))
			     )
			    )
			  {
			    coltry5++;
			    rowtry++;
			  }
			  }
			j2--;
		      }
		  }
	      }

	    if (rowtry<0)
	      {
		Ynewloc = Ynewloc2+(int)(Math.random()*5.0)*3;
	      }
	    else
	      {
		Ynewloc = Ynewloc1-(int)(Math.random()*5.0)*3;
	      }

	    if (
		(coltry1 <= coltry2) &&
		(coltry1 <= coltry3) &&
		(coltry1 <= coltry4) &&
		(coltry1 <= coltry5)
		)
	      {
		Xnewloc = (int)(Math.random()*(float)(col_offset/3))*3+col1yA;
	      }
	    else if (
		(coltry2 < coltry1) &&
		(coltry2 < coltry3) &&
		(coltry2 < coltry4) &&
		(coltry2 < coltry5)
		)
	      {
		Xnewloc = (int)(Math.random()*(float)(col_offset)/3)*3+col2yA;
	      }
	    else if (
		(coltry3 <=coltry1) &&
		(coltry3 <=coltry2) &&
		(coltry3 <=coltry4) &&
		(coltry3 <=coltry5)
		)
	      {
		Xnewloc = (int)(Math.random()*(float)(col_offset)/3)*3+col3yA;
	      }
	    else if (
		(coltry4 < coltry2) &&
		(coltry4 < coltry3) &&
		(coltry4 < coltry1) &&
		(coltry4 < coltry5)
		)
	      {
		Xnewloc = (int)(Math.random()*(float)(col_offset)/3)*3+col4yA;
	      }
	    else if (
		(coltry5 <=coltry2) &&
		(coltry5 <=coltry3) &&
		(coltry5 <=coltry4) &&
		(coltry5 <=coltry1)
		)
	      {
		Xnewloc = (int)(Math.random()*(float)(col_offset)/3)*3+col5yA;
	      }
	    else
	      {
		Xnewloc = (int)(Math.random()*(float)(space_width-50))+
		    left_space;
	      }

	    if (number_words < 100)
	      {
	        j2 = number_words-1;
		while(j2 >= 0)
	          {
		    // This discover-free-space clause is not perfect,
		    // but I am trying to avoid a slow sorting routine
		    // or hash table.  This is at least an improvement.
		    if ((words[j2].Y>130) && (words[j2].Y<170))
		      {
			if ((words[j2].X<=Xnewloc) &&
			    ((words[j2].X+words[j2].width)>=Xnewloc)
			    )
			  {
			    // Xnewloc = words[j2].X-30;
			  }
		      }
		    words[j2+1] = words[j2];
		    j2--;
		  }
		number_words++;
		for (int j = 0; j < number_links; j++)
		  {
		    links[j].incrementIndex1();
		    links[j].incrementIndex2();
		  }
		if (mode.equals("ADD") && submode.equals("CONCEPT WORD"))
		  {
		    words[0] = new MoveableWord(new
					String(text_entry_box.getText()),
						"CONCEPT");
		  }
		else if (mode.equals("ADD") && submode.equals("LINKING WORD"))
		  {
		    words[0] = new MoveableWord(new
					      String(text_entry_box.getText()),
						"LINKINGWORD");
		  }
		// Define coordinates of word (in such a way as to minimize
		// overlapping; see the processing of Xnewloc and Ynewloc
		// above).
		if ((words[0].X+words[0].width)>(left_space+space_width))
		  {
		    Xnewloc = left_space+space_width-words[0].width-10;
		  }
		if (Xnewloc<(left_space+10))
		  {
		    Xnewloc = left_space+10;
		  }
		words[0].X = Xnewloc;
		words[0].Y = Ynewloc;

		// Immediately draw word.
		repaint(words[0].X, words[0].Y,
			words[0].width, words[0].height);
		words[0].set_center();
	      }
	    event_counter = 1; // Reset event counter.
	    // To be on the safe (browser-compatible) side, redraw applet.
	    repaint(0, 0, applet_width, applet_height);
	    return;
	  }
	// "change word" action button?
	else if (mode.equals("EDIT") && 
	       submode.equals("EDIT WORD") &&
	       event_counter ==