import java.awt.*;
import java.awt.event.*;
import java.io.* ;
import java.util.*;

/* Java 1.1+ GUI Application Slide-Show BrowserController
                                       09/24/2001         M. Gallant  */


public class pagelet extends Frame implements ActionListener, MouseListener {
 private Button b1,b2,b3,b4,b5,b6,b7,b8, b25 ;
 Label  l1, l3, lslide, lpaused;
 TextField tf,ts;
 public Vector urllist;
 int pages=0;
 int currentpage=0;
 boolean paused=false;
 int interval=3000;
 showthread sht = new showthread(this, interval) ;
 boolean pausestatus = false;
 String[] headerfields = {"     Web Pagelet     ",  "Version 1.0" , " for win32 platforms", " by M. Gallant 09/2001" } ;
 int headers = headerfields.length ;
 int headerindex = 0;
 String basecommand = "start " ;   // default basecommand for Win95, 98 etc.

  public pagelet(String name) {
    super(name) ;

    if((System.getProperty("os.name").indexOf("NT")>=0) || (System.getProperty("os.name").equals("Windows 2000")) )  ; //for NT or 2000 platform
      basecommand = "cmd.exe /c start " ;          // add other tests for other platform scripts

    Panel p = new Panel() ;
    p.setLayout(new GridLayout(5,2,10,10)) ;
    l1= new Label(headerfields[0],Label.CENTER) ;
    l1.setFont(new Font("TimesRoman", Font.BOLD, 15)) ;
    l1.addMouseListener(this) ;
     l1.setForeground(Color.yellow) ;
     l1.setBackground(Color.blue) ;
    l3 = new Label(" Stopped ") ;
    Label l4 = new Label("Time:", Label.RIGHT) ;
    lslide = new Label("Slide 0 of 0   ") ;
    lpaused = new Label("Not paused" ) ;
    tf = new TextField(String.valueOf(interval), 5) ;

    b1=new Button("Backward") ;
     b1.addActionListener(this) ;
    b2=new Button("Forward") ;
     b2.addActionListener(this) ;
    b3=new Button("First Page") ;
     b3.addActionListener(this) ;
    b4=new Button("Last Page") ;
     b4.addActionListener(this) ;
    b5=new Button("Load List") ;
     b5.addActionListener(this) ;
    b6=new Button("AutoShow") ;
     b6.addActionListener(this) ;
    b7=new Button("Show List") ;
     b7.addActionListener(this) ;
    b8=new Button("PauseShow") ;
     b8.addActionListener(this) ;
    b25=new Button("--- EXIT ---") ;
     b25.setBackground(Color.red);
     b25.addActionListener(this) ;
    p.add(b5);
    p.add(b7);
    p.add(b1);
    p.add(b2);
    p.add(b3);
    p.add(b4);
    p.add(b6);
    p.add(l3);
    p.add(b8);
    p.add(lpaused) ;   
    p.validate();
     Panel p2=new Panel() ;
     p2.add(p) ;
     add("Center", p2);

    p=new Panel();
     p.setBackground(Color.blue) ;
    p.add(l1) ;
    p.addMouseListener(this) ;
     add("North",p) ; 

    p=new Panel() ;
    p.setBackground(Color.lightGray) ;    
    p.setLayout(new GridLayout(3,1)) ;
     p2 = new Panel() ;
     p2.add(l4) ;
     p2.add(tf) ;
    p.add(p2) ;
     p2 = new Panel() ;
      p2.add(lslide) ;
     p.add(p2) ;
     p2 = new Panel() ;
     p2.add(b25);
    p.add(p2);
   add("South",p) ;
    validate();
   }

 public Insets getInsets() {
   return new Insets(24,5,5,5) ;
 }


 public void paint(Graphics g) {
  g.setColor(Color.black) ;
  g.fillRect(0,0,this.getSize().width, this.getSize().height) ; 
  }


   public void mousePressed(MouseEvent e)  {
       headerindex = ++headerindex % headers ;
     if(headerindex==0)
       l1.setFont(new Font("TimesRoman", Font.BOLD, 16)) ;
     else
       l1.setFont(new Font("TimesRoman", Font.PLAIN, 12)) ;
     l1.setText(headerfields[headerindex]) ; 
   }
   public void mouseReleased(MouseEvent e) {
   }
   public void mouseEntered(MouseEvent e)  {
   }
   public void mouseExited(MouseEvent e)   {
   }
   public void mouseClicked(MouseEvent e)  {
   }

  public void actionPerformed(ActionEvent e) {
    if ((e.getActionCommand()).equals("Forward")){
     if(pages>0){
      currentpage = ++currentpage % pages ;
      lslide.setText("Slide " + currentpage +" of " + (pages-1)) ;
      loadWebPage((String)urllist.elementAt(currentpage)) ;
      }
     }
    else
     if ((e.getActionCommand()).equals("Backward")){
      if(pages>0){
       --currentpage;
       if(currentpage<0) 
         currentpage=pages-1 ;   //rotate to end
      lslide.setText("Slide " + currentpage +" of " + (pages-1)) ;
      loadWebPage((String)urllist.elementAt(currentpage)) ;
      }
     }
    else
     if((e.getActionCommand()).equals("First Page")){
       if(pages>0){
         loadWebPage((String)urllist.elementAt(0)) ;
         currentpage=0;
         lslide.setText("Slide " + 0 +" of " + (pages-1)) ;
        }
       }
    else
     if((e.getActionCommand()).equals("Last Page")){
       if(pages>0){
        loadWebPage((String)urllist.elementAt(pages-1)) ;
        currentpage = pages-1 ;
        lslide.setText("Slide " + (pages-1) +" of " + (pages-1)) ;
       }
       }
    else
     if((e.getActionCommand()).equals("AutoShow")){
    if(!sht.isAlive()) {
      sht = new showthread(this,Integer.parseInt(tf.getText())) ; 
      sht.start() ;
      l3.setText(" Started ...") ;
      }
     else{
      sht.stop() ;      
      l3.setText(" Stopped ") ;
      lpaused.setText("Not paused ") ;
      paused = false ;
      }
     }
    else
     if((e.getActionCommand()).equals("PauseShow")){
      if(sht.isAlive())
       if(!paused) {  // if the AutoShow thread is running  ...
        paused = true;
        lpaused.setText("Paused ") ;
        sht.suspend() ;         
       }    
      else {
       paused = false;
       lpaused.setText("Not paused ") ;
       sht.resume() ;
      }
   }
    else
    if ((e.getActionCommand()).equals("Load List")){
      urllist = geturllist();
     }
    else
    if ((e.getActionCommand()).equals("Show List")){
     loadWebPage("urlist.txt");   //display with default .txt application
     }
     else 
       if ((e.getActionCommand()).equals("--- EXIT ---"))
       System.exit(0) ;
   }

 private Vector geturllist() {
   paused=false;
   Vector urlvect=new Vector();
   pages = 0 ;
   lslide.setText("0") ;
   BufferedReader dis=null;

 try {
  dis = new BufferedReader(new FileReader("urlist.txt")) ;
  String line="" ;
     while( (line=dis.readLine()) !=null ) {
      if(!line.equals("")) {    //reject blank lines
         urlvect.addElement(line);
         pages++ ;
       } 
      } 
    dis.close() ;
  }
   catch (IOException ioe) {
     System.out.println("Problem with Process ..") ;
    }
  if(pages>0){ 
   loadWebPage((String)urlvect.elementAt(0)) ;
   currentpage=0;
   } 
  System.out.println(pages + "  " + currentpage ) ;
   this.toFront() ;
   lslide.setText("Slide " + 0 +" of " + (pages-1)) ;
  return urlvect;
 }

 public void loadWebPage(String url) {
   try{
    String appl = basecommand + url ;
    Runtime.getRuntime().exec(appl);
    }
  catch (IOException ioe) {
   System.out.println("Problem with Process ..") ;
  }
 }

 void pause(int time) {
       try { Thread.sleep(time);}  // wait for time milliseconds.
        catch (InterruptedException e) { }
     }


  public static void main(String args[]) {
   pagelet demos = new pagelet("Web Pagelet");
    demos.pack();
   demos.setVisible(true);
   demos.urllist=demos.geturllist() ;
   demos.toFront() ;
  }    
 
} 
  
/* Thread to run AutoShow */
class showthread extends Thread{
 pagelet parent ;
 int interval;

  showthread(pagelet pgl, int interval) {
   this.interval = interval;
   parent=pgl ;
  }

 public void run() {
  parent.currentpage=0 ;
  while(parent.currentpage<parent.pages){
   parent.lslide.setText("Slide " + parent.currentpage +" of " + (parent.pages-1)) ;
   parent.loadWebPage((String)parent.urllist.elementAt(parent.currentpage++)) ;
     if(parent.currentpage==parent.pages) 
       break;
       try { Thread.sleep(interval);}  // wait for time milliseconds.
        catch (InterruptedException e) { }
     }
  parent.currentpage=0 ;
  parent.l3.setText(" Stopped ") ;
  }
}