/*----------------------------------------------------------------------*/
/*  SimpleApplet - a simple applet that uses Rotator                    */
/*----------------------------------------------------------------------*/
/*            Jim Morey  -  morey@math.ubc.ca  -  May, 1996             */
/*----------------------------------------------------------------------*/

import java.io.*;
import java.applet.*;
import java.awt.*;
import java.net.*;
import java.lang.*;
import Rotator;
import java.awt.Choice;
import HBlock;

/*----------------------------------------------------------------------*/
public class SimpleApplet extends Applet {
  Rotator rotator;
  Checkbox spin, xyZ, xyW;
  Button  colour;
  Choice choice;
  URL    here;
  int     H,W;

  /* -  -  -  -  -  -  -  -  -  -  -  -  -  -  -  -  -  -  -  -  -  - */
  public void init() {
    setLayout(new FlowLayout(FlowLayout.CENTER,0,0));
    setBackground(Color.white); 
    String config = getParameter("hBlock");
    String title = getParameter("title");
    here = this.getDocumentBase();
    try {
      /* .. get list of files .. */
      choice = new Choice();
      InputStream is_index = new URL(here,config).openStream();
      StreamTokenizer token = new StreamTokenizer(is_index);
      token.eolIsSignificant(false);
      token.commentChar('#');
      token.nextToken();
      int number = (int)token.nval;
      for (int i=0;i<number;i++){
        token.nextToken();
        choice.addItem(token.sval);
      }
      choice.select(0); 

      /* .. get solid info .. */
      W =size().width; 
      H =size().height-50;
 
      String fileName = choice.getSelectedItem(); 
      InputStream is_solid = new URL(here,fileName).openStream();
      HBlock solid = new HBlock(is_solid,W,H);
      is_solid.close();

      add(new Label(title,Label.CENTER));
      rotator= new Rotator(this,solid,W,H);
      new Thread(rotator).start(); 
      rotator.background = new Color(255,200,200);
      add(rotator);
    
      Panel check = new Panel();
      add (choice);
      check.add (colour= new Button("colours"));
      check.add(spin = new Checkbox("spin"));
      spin.setState(true);
      CheckboxGroup movement = new CheckboxGroup(); 
      check.add(xyZ = new Checkbox("xyZ",movement,true));
      check.add(xyW = new Checkbox("xyW",movement,false));
      add(check);
      show();
    } catch (MalformedURLException e){
      System.out.println("MalformedURLException --config!");
    } catch (IOException e){
      System.out.println("IOException --config!");
    }
  }
 /*  -  -  -  -  -  -  -  -  -  -  -  -  -  -  -  */
  public boolean handleEvent (Event evt){
    switch (evt.id){
      case Event.ACTION_EVENT:
        if (evt.target == spin){
          if (((Checkbox)evt.target).getState()){
            rotator.spin = true;
            rotator.start();
          } else {
            rotator.spin = false;
            rotator.stop();
          }
          return true;
        } else if (evt.target == xyZ){
          rotator.odir=2;
          return true;
        } else if (evt.target == xyW){
          rotator.odir=3;
          return true;
        } else if (evt.target == colour){
          rotator.solid.colourChange();
          rotator.repaint();
          return true;
        } else if (evt.target == choice){
          rotator.stop();
          try{
            String fileName = choice.getSelectedItem(); 
            InputStream is_solid = new URL(here,fileName).openStream();
            HBlock solid = new HBlock(is_solid,W,H);
            rotator.solid = solid;
            rotator.start();
            is_solid.close();
          } catch (MalformedURLException e){
            System.out.println("MalformedURLException --config!");
          } catch (IOException e){
            System.out.println("IOException --config!");
          }
          return true;
        } else return false;
      default :
        return false;
    }
  }

  /* -  -  -  -  -  -  -  -  -  -  -  -  -  -  -  -  -  -  -  -  -  - */
  public void stop(){
    rotator.stop();
  }
 
  /* -  -  -  -  -  -  -  -  -  -  -  -  -  -  -  -  -  -  -  -  -  - */
  public void start(){
    rotator.start();
  }

}