/*
 * 
 * ktn.java
 * @author: Rajesh Dhawan and Tarique Sani
 * 
 * 
 */

 /*
<applet code="ktn" width=350 height=100>
<param name=item0 value="Web Hosting+people+May we give you an Internet presence?+info">
<param name=item1 value="Orange City+orange+India's city of oranges & orchids">
<param name=item2 value="Business Profiles+dasfa+Our exquisite corporate clients+info">
<param name=item3 value="Faces & Views+34rfwerw+The people on the job here+info">
<param name=item4 value="Concept Creator+concept+We help you create a concept for your products+info">
<param name=welcome value="Please wait ...">
<param name=delay value=5>
  </applet>
 * 
 */

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

public class ktn extends java.applet.Applet implements Runnable{
   String items[]=new String[25];
   String tags[]=new String[25];
   String frm[]=new String[25];
   URL page[]=new URL[25];
   int nItems=0;
   int current=0;
   int y=0;
   int x=0;
   Image img[]=new Image[25];
   Image mirror[]=new Image[25];
   AppletContext ac=null;
   int delay=5;
   Image arrow=null;
   int w,h;
   Color BLUE=new Color(0,0,0x80);
   
   
   public void init(){

      
      setLayout(null);
      setBackground(BLUE);
      getParent().setBackground(BLUE);
      Graphics gr=getParent().getGraphics();
      String welcome=getParameter("welcome");
      gr.setColor(Color.white);
      gr.setFont(new Font("Helvetica",Font.PLAIN,18));
      w=size().width;
      h=size().height/2;
      gr.drawString(welcome,10,h);
      gr.drawLine(0,h+5,w,h+5);
      
      ac=getAppletContext();
      
      try{
	 for (nItems=0;nItems<25;nItems++){
	    StringTokenizer st=new StringTokenizer(getParameter("item"+(nItems)),"+");
	    items[nItems]=st.nextToken();
	    page[nItems]=new URL(getDocumentBase(),st.nextToken());
	    tags[nItems]=st.nextToken();
	    if (st.hasMoreTokens()) frm[nItems]=st.nextToken();
	    else frm[nItems]="_top";
	    if (items[nItems]==null) break;
	 }
      }catch (Exception e){
      }

      delay=Integer.parseInt(getParameter("delay"))*1000;

      Font fnt=new Font("Helvetica",Font.BOLD,30);
      FontMetrics fm=getFontMetrics(fnt);

      int xp[]=new int[3];
      int yp[]=new int[3];
      xp[0]=0+4;yp[0]=0+2;
      xp[1]=0+4;yp[1]=20+2;
      xp[2]=10+4;yp[2]=10+2;
      Polygon pp=new Polygon(xp,yp,3);
      arrow=createImage(25,25);
      Graphics g=arrow.getGraphics();
      g.setColor(new Color(0x80,0x80,0x80));
      g.fill3DRect(0,0,25,25,true);
      g.setColor(new Color(0,0xff,0));
      g.fillPolygon(pp);
      
      
      for (int i=0;i<nItems;i++){
	 img[i]=createImage(w,h);
	 Graphics gc=img[i].getGraphics();
	 gc.setFont(fnt);
	 gc.setColor(BLUE);
	 gc.fillRect(0,0,w,h);
	 int blue=0;
	 char  c;
	 int p=(w-fm.stringWidth(items[i]))/2;
	 for (int j=0;j<items[i].length();j++){
	    gc.setColor(new Color(0xff-blue,0xff-blue,0xff-blue));
	    c=items[i].charAt(j);
	    gc.drawString(""+c,p,h-6);
	    p+=fm.charWidth(c);
	    blue+=0x80/items[i].length();
	 }
	 gc.setColor(Color.white);
	 gc.drawLine(0,h-1,w,h-1);
	 int pixels[]=new int[w*h];
	 int mirror_pixels[]=new int[w*h];
	 PixelGrabber pg=new PixelGrabber(img[i],0,0,w,h,pixels,0,w);
	 try{
	    pg.grabPixels();
	 }catch (InterruptedException e){
	 }
	 
	 for (int hh=0;hh<h;hh++)
	   for (int ww=0;ww<w;ww++){
	      mirror_pixels[hh*w+ww]=processIt(pixels[(h-hh-1)*w+ww]);
	   }
	 mirror[i]=createImage(new MemoryImageSource(w,h,mirror_pixels,0,w));
      }
      
   }
   
   int processIt(int c){
    int r,g,b;
      r=(c&0xff0000)>>16;
      g=(c&0xff00)>>8;
      b=c&0xff;

      if (r!=0){
	 r-=40;
	 g-=40;
	 b-=40;
      }
      return ((0xff000000)|(r<<16)|(g<<8)|b);
   }

   public void update(Graphics g){
      paint(g);  
   }
   
   boolean selected=false;
   public void paint(Graphics g){
      
      g.drawImage(img[index],0,0,w,h,this);
      
      if (selected) {
	 g.setColor(new Color(0,0xff,0));
	 g.drawLine(0,h-1,w,h-1);
	 for (int i=0;i<5;i++){
	    int hh=5*(i+1);
	   g.drawImage(arrow,10,h-20-hh/2,25,hh,this);
	    try{Thread.sleep(50);
	    }catch (InterruptedException e){
	    }
	 }
	 g.setColor(BLUE);
	 g.fillRect(0,h,w,h);
	 g.setFont(new Font("TimesRoman",Font.BOLD,14));
	 g.setColor(Color.white);
	 g.drawString(tags[index],10,h+18);
      }else{
	 g.drawImage(mirror[index],0,h,w,h,this);
      }
   }

   
   public String getAppletInfo(){
          return (new String("(C) Copyright 1997 Rajesh Dhawan and Tarique Sani, \n <sanisoft@earthling.net>"));  
   }
   
   Thread t=null;
   public void start(){
      if (t==null){
	 t=new Thread(this);
	 t.start();
      }else{
	 t.resume();
      }
   }
   
   public void stop(){
      if (t!=null){
	 t.suspend();
      }
   }

   
   public void destroy(){
      t.stop();
      t=null;
   }
    
   
   int index=0;
   int old=0;
   public void run(){

      while (true){
	 try {
	    Thread.sleep(delay);
	 }catch (InterruptedException e){
	 }
	 index++;
	 if (index>=nItems) index=0;
	 repaint();
      }
   }

   
   
   public boolean mouseDown(Event evt,int x,int y){
      ac.showDocument(page[index],frm[index]);
      return true;
   }
   
   
   public boolean mouseEnter(Event evt,int x,int y){
    
      selected=true;
      t.suspend();
      repaint();
      return true;
   }
   
   public boolean mouseExit(Event evt,int x,int y){
      
      selected=false;
      t.resume();
      repaint();
      return true;
   }
   
}