/*
 * RunningText.java - 14 Feb 1996 - Version 1
 * Copyleft 1996 by Jayakrishnan.B
 *
 * ChangeLog
 *
 * Version 1.1 1 March 1997
 * Added shadow support
 *
 * E-mail: jk@csr.UVic.CA
 * WWW: http://www.csc.UVic.CA/~jk
 *
 *
 *
 * Usage:
 *
 *  <applet code="RunningText.class" width=200 height=100 ALIGN=MIDDLE>
 *  <param name=TEXT value="Hello World">
 *  <param name=FONT value="Courier">
 *  <param name=FONTSTYLE  value=2>
 *  <param name=FONTSIZE value=18>
 *  <param name=FGCOLOR  value="eedd80">
 *  <param name=BGCOLOR value="ffffff">
 *  <param name=WIDTH value=200>
 *  <param name=HEIGHT value=50>
 *  <param name=SHADOW value=1>
 *  <param name=FILENAME value="runbase.txt">
 *  </applet>
 *
 *
 * Permission to use, copy, modify, and distribute this software
 * and its documentation for NON-COMMERCIAL or COMMERCIAL purposes and
 * without fee is hereby granted, provided that any use properly credits
 * the author, i.e. "Running Text courtesy of <A HREF="http://www.csc.UVic.CA/~jk">
 * Jayakrishnan Nair</A> is displayed.
 */

import java.awt.*;
import java.applet.*;
import java.net.*;

public class RunningText extends Applet implements Runnable
{

   String text;                 // To store the string to be displayed
   String font_name = "Helvetica";
   Font f = new Font(font_name,1,10);
   Color fgcolor = new Color(255,255,255);
   Color bgcolor = new Color(0,0,0);
   Thread jkthread = null;
   int x = 0;
   int rlength;
   int rheight;
   int height =30;
   int width = 300;
   int font_style = 1;
   int font_size = 10;
   boolean shadowOn;
   String fileName;

   Image image;
   Graphics graphics;


public void init()
   {
      String paramString = getParameter("TEXT");
      if(paramString != null)
         text = paramString;


      paramString = getParameter("WIDTH");
      if(paramString != null)
         width = Integer.valueOf(paramString).intValue();

      paramString = getParameter("HEIGHT");
      if(paramString != null)
         height = Integer.valueOf(paramString).intValue();

      paramString = getParameter("FONTSTYLE");
      if(paramString != null)
         font_style = parseFontStyle(paramString);

      paramString = getParameter("FONTSIZE");
      if(paramString != null)
         font_size = Integer.valueOf(paramString).intValue();

      paramString = getParameter("FONT");
      if(paramString != null)
         f = new Font(paramString,font_style,font_size);

      paramString = getParameter("FGCOLOR");
      if(paramString != null)
         fgcolor = parseColorString(paramString);


      paramString = getParameter("BGCOLOR");
      if(paramString != null)
         bgcolor = parseColorString(paramString);


    paramString = getParameter("SHADOW");
    if(paramString != null) {
        try {
            int value = Integer.valueOf(paramString).intValue();
            if(value > 0)
                shadowOn = true;
            else
                shadowOn = false;
        } catch( NumberFormatException e) {
            shadowOn = false;
        }
    }


    paramString = getParameter("FILENAME");
    if(paramString != null) {
        String temp = parseFile(paramString);
        if(temp != null)
            text = temp;
        else if(text == null)
            text = "Running Text Applet version 2.0";
    }

    if(text == null)
        text = "Running Text Applet version 2.0";

      image = createImage(size().width,size().height);
      graphics = image.getGraphics();
   }

    private String parseFile(String file) {
        String fileContents;
        try {
            URL url = new URL(getDocumentBase(),file);
            fileContents = (String)url.getContent();
        } catch (Exception e) {
            fileContents = null;
        }
        return fileContents;
    }


private Color parseColorString(String colorString)
   {
      if(colorString.length()==6){
         int R = Integer.valueOf(colorString.substring(0,2),16).intValue();
         int G = Integer.valueOf(colorString.substring(2,4),16).intValue();
         int B = Integer.valueOf(colorString.substring(4,6),16).intValue();
         return new Color(R,G,B);
      }
      else return Color.lightGray;
   }

private int parseFontStyle(String ps)
   {
      int fontstyle = Integer.valueOf(ps).intValue();
      if((fontstyle == 1)||(fontstyle == 2)||(fontstyle == 3))
         return (fontstyle);
      else
         return (1);
   }

public void paint(Graphics g)
   {
      paintText(graphics);
      g.drawImage(image,0,0,null);

   }

public void update(Graphics g)
   {
      paint(g);
   }


public void paintText(Graphics g)
   {

      int y = (height+rheight)/2;

      g.setColor(bgcolor);
      g.fillRect(0,0,width,height);

      g.setFont(f);
      FontMetrics fm = g.getFontMetrics();
      rlength = fm.stringWidth(text);
      rheight = fm.getHeight();

      if(shadowOn) {
          g.setColor(fgcolor.darker().darker());
          g.drawString(text,x+2,y+2);
      }

      g.setColor(fgcolor);
      g.drawString(text,x,y);
   }

public void start()
   {
      if(jkthread == null)
      {
         jkthread = new Thread(this);
         jkthread.start();
      }
   }

public void calculate()
   {
      x = x - 5;
      if(x < -rlength)
         x = size().width;
   }

public void run()
   {
      while(jkthread != null)
      {
         try
         {
            Thread.sleep(100);
         }
         catch(InterruptedException e){}
         calculate();
         repaint();
      }
   }

public void stop()
   {
      if(jkthread != null)
         jkthread.stop();
      jkthread = null;
   }

public String[][] getParameterInfo()
   {
      String[][] info =
      {
         {"TEXT","string","Text to be displayed"},
         {"FONT","string","Font to be used for the text"},
         {"WIDTH","int","Width of the Display Area"},
         {"HEIGHT","int","Height of the Display Area"},
         {"FONTSTYLE","int","1 for Normal, 2 for Bold and 3 for Italics"},
         {"FONTSIZE","int","Size of Font"},
         {"FGCOLOR","string","hex color triplet of the foreground eg ff6347"},
         {"BGCOLOR","string","hex color triplet of the background eg 000000"},
      };
      return info;
   }

public String getAppletInfo()
   {
      return "RunningText - applet by Jayakrishnan.B, 14 Feb 1996\nhttp://konark.ncst.ernet.in/~jk or jk@konark.ncst.ernet.in";
   }

}