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1.1
date	97.11.09.01.23.12;	author kowallik;	state Exp;
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desc
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1.1
log
@Initial revision
@
text
@// main applet which sets up main window and calls all the other classes


import java.applet.Applet;
import java.awt.*;
import java.util.*;
import java.lang.*;


public class main extends Applet
{

   Button four, avst;

   T_Graph time;
   P_Graph phase;				
   graphic out;				// the pendulum itself 
   animation doit;			// thread for animation

   Control_Win control;			// the extra frame with controls
   Welcome hello;
   
// create layout for main window, open window with controls

   public void setup()
   {
      GridBagLayout glb = new GridBagLayout();
      setLayout(glb);
               
      out   = new graphic();
      time  = new T_Graph();
      phase = new P_Graph();
   
      four = new Button("Power Spectrum");
      avst = new Button("Angle vs. Time");
           
      GridBagConstraints c=new GridBagConstraints();
      c.gridx=0;
      c.gridy=0;
      c.gridwidth=10;
      c.gridheight=10;      
      c.weightx=1;
      c.weighty=1;
      c.fill=GridBagConstraints.BOTH;
      add(out);
      glb.setConstraints(out, c);
   
      c.gridx=10;
      add(phase);
      glb.setConstraints(phase, c);
           
      c.gridwidth=20;
      c.gridx=0;
      c.gridy=10;
      add(time);
      glb.setConstraints(time, c);
   
      c.gridheight=1;       
      c.gridwidth=10;
      c.gridx=0;
      c.gridy=21;
      c.weightx=1.0;
      c.weighty=0.1;
      c.fill=GridBagConstraints.HORIZONTAL;
      add(avst);
      glb.setConstraints(avst, c);
   
      c.gridx=10;
      c.fill=GridBagConstraints.HORIZONTAL;
      add(four);
      glb.setConstraints(four, c);
      
      control= new Control_Win(this);
      control.show();
      
      show();
   }
        

// executed once when Applet is loaded

   public void init()
   {
      hello = new Welcome(this);
      hello.show();
   }


// executed when Applet is started

   public void start()
   {   
      setup();   
   } 


   public void stop()
   {   
      
      
      
      if(control != null)
      {
         control.exit();
         control.dispose();
      }
      
      if (hello!=null)
      {
         hello.dispose();
         hello = null;
      }
      phase.exit();
      time.exit();
      
      this.removeAll();
      doit = null;
      
      java.lang.System.gc();
   
   }
   
   public String getAppletInfo()
   {
      return("Animation of complicated behavior of a damped, driven pendulum\n" +
             "\twritten by\n\tHans Kowallik (kowallik@@sdsc.edu) \n" +
              "copyright: Hans Kowallik \n");
   }
   
   public boolean handleEvent(Event evt)
   {
   
      switch(evt.id)
      {
         case Event.ACTION_EVENT:
         if(evt.target==avst)
         {
            try
            {
               if(!control.doit.isAlive())
               {
                  time.drawcom();
                  return true;
               }
            }catch (NullPointerException npe)
            {}
         }
         if(evt.target==four)
         {
            try
            {
               if(!control.doit.isAlive())
               {
                  time.fdrawall();
                  return true;
               }
            }catch (NullPointerException npe)
            {}
         }
      }
      return false;
   }
}



 
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