import javax.swing.*;
import java.applet.*;
import java.net.*;
import java.awt.event.*;
import javax.swing.tree.*;
import java.util.*;
public class Puu2 extends JApplet{
 public Puu2(){
  DefaultMutableTreeNode juur= new DefaultMutableTreeNode(
    new Lk("Dynamical Systems", "../dsmain.html"));   
  DefaultMutableTreeNode oks= new DefaultMutableTreeNode(
    new Lk("Linear Systems", "../linear/sub.html"));
  juur.add(oks);
  lisa(oks, new Lk("Introduction", "../linear/intro/LSYSint.html"));
  lisa(oks, new Lk("Phase Portraits", "../linear/phase/LINSYS2.html"));
  lisa(oks, new Lk("Matrix Algebra", "../linear/matrix/LSYSmat.html"));
  lisa(oks, new Lk("Stability ", "../linear/stability/LSYSequ.html"));
  lisa(oks, new Lk("Case Study", "../linear/case/CaseStudy.html"));
  lisa(oks, new Lk("Summary", "../linear/summary/summary.htm"));
  final JTree puu=new JTree(juur);
  getContentPane().add("Center", puu);
  puu.addMouseListener(
    new MouseAdapter(){
      public void mouseClicked(MouseEvent e){
        int veerg=puu.getRowForLocation(e.getX(), e.getY());
        int nr=e.getClickCount();
        if(nr>1){
         try{
          Object o=((DefaultMutableTreeNode)puu.getLastSelectedPathComponent()).
                     getUserObject();
          String url=((Lk)o).viide;
//          String url=((Lk)(((Object)puu.getLastSelectedPathComponent()))).viide;
          System.out.println(url);
          getAppletContext().showDocument(new URL(getCodeBase(), url), "uus");
         }catch(Exception ex){ex.printStackTrace();
            System.out.println(ex.getMessage());
         }
        }
//        System.out.println("Hiir veerus "+veerg+" "+nr+" korda.\n"+
//           puu.getLastSelectedPathComponent());
      }
    }
  );
 }
 void lisa(DefaultMutableTreeNode oks, Object o){
     oks.add(new DefaultMutableTreeNode(o));
 }

 public static void main(String argumendid[]){
   JFrame raam=new JFrame();
   Applet puu=new Puu2();
   raam.getContentPane().add(puu);
   raam.pack();
   raam.setVisible(true);
 }
}
class Lk{
  String pealkiri, viide;
  public Lk(String upealkiri, String uviide){
    pealkiri=upealkiri;
    viide=uviide;
  }
  public String toString(){
   return pealkiri;
  }
}