import java.awt.*;

public class HPLab extends java.applet.Applet {

private boolean debug = true;
private final int WIDTH  = 600;
private final int HEIGHT = 400;

private GraphPanel graph;
private SubstanceList my_list;

private Button clear, reveal, reset;
private Checkbox save;
private Component[] buttons = { clear  = new Button(), 
                                reveal = new Button(), 
                                reset  = new Button(),
                                save   = new Checkbox()
                              };
private String ssave;                              
private String[] labels =  { "Clear graph",
                             "Reveal states",
                             "Reset graph",
                              ssave = "Save off" 
                           };
private Font label_font;                                                      
private Rectangle bounds, rgraph, rlist, rcontrol, rtext;
private Rectangle[] rbuttons;
private boolean loaded;
private List list;
private TextArea  tstate;

public void init() {
  resize(WIDTH, HEIGHT);
  label_font = new Font("TimesRoman", Font.BOLD, 12);
  my_list = new SubstanceList();
  rbuttons = new Rectangle[buttons.length];
  list = new List();
  for(int i=0; i<my_list.length(); i++) { list.addItem( my_list.at(i).getName() ); }
  list.setBackground(Color.black);
  list.setForeground(Color.green);
  list.select(0);
  
  graph = new GraphPanel( my_list.at(list.getSelectedIndex()) );
  
  setLayout(null);
  loaded = false; 
}

public void paint(Graphics g) {
   if(!loaded) { initLayout(); loaded = true; }   
   
   drawBackground(g);
   drawButtonLabels(g);
   int width = 40;
   Engraved.draw3DLine(g,rcontrol.x+(rcontrol.width-width)/2, rcontrol.y+rcontrol.height+5,
                  rcontrol.x+(rcontrol.width+width)/2, rcontrol.y+rcontrol.height+5, false);   

   update(g);                  
}

public void update(Graphics g) {
   drawSaveMode(g);
}

/*********************Update**********************/
private void drawSaveMode(Graphics g) {
   int i;
   for(i=0; i<buttons.length; i++) {
      if(buttons[i] == save) break;
   }
   labels[i] =  (save.getState()) ? "Save on" : "Save off";
   g.setColor(Color.black);
   g.fillRect(rbuttons[i].x,rbuttons[i].y,rbuttons[i].width,rbuttons[i].height);
   drawButtonLabels(g);   
}

/*********************Paint**********************/
private void drawBackground(Graphics g) {
   g.setColor(Color.black);
   g.fillRect(5, 5, WIDTH-10, HEIGHT-10);
   
   g.setColor(Color.gray);
   g.drawLine(rgraph.x+rgraph.width+1, 5, rgraph.x+rgraph.width+1, HEIGHT-10);
   
   Engraved.draw3DRect(g, 2, 2, WIDTH-4, HEIGHT-4, true);
}

private void drawButtonLabels(Graphics g) {
   g.setFont(label_font);
   g.setColor(Color.green);
   for(int i=0; i<buttons.length; i++) {
      g.drawString(labels[i], rbuttons[i].x+20, rbuttons[i].y+rbuttons[i].height);
   }
}

/***********************************************/
public boolean handleEvent(Event evt) {
   if(evt.target == list) {
      if(evt.id == Event.LIST_SELECT) {
         // not implemented
      }
      else if(evt.id == Event.ACTION_EVENT) {
         int i = list.getSelectedIndex();
         graph.setSubstance(my_list.at(i));
      }
      else return super.handleEvent(evt);
   }
   else return super.handleEvent(evt);
   return true;
}

public boolean action(Event evt, Object arg) {
   if(evt.target == reset) {
      graph.reset();
   } 
   else if(evt.target == reveal) {
      graph.reveal();
   }
   else if(evt.target == clear) {
      graph.clear();
   }
   else if(evt.target == save) {
      graph.setSaveMode(save.getState());
      repaint();
   }      
      
   else return super.action(evt,arg);
   return true;
}


public boolean mouseEnter(Event evt, int x, int y) {
   if(evt.target == graph) {
      graph.requestFocus();
   }
   else return super.mouseEnter(evt,x,y);
   return true;
}

private void initLayout() {
   initBounds();
   initGraph();
   initList();
   initButtons();
   //initRest();  
}

private void initBounds() {
   int inset = 5;
   bounds = new Rectangle(inset, inset, size().width-2*inset, size().height-2*inset);
}

private void initGraph() {
   int x = bounds.x;
   int y = bounds.y;
   int width = 5*bounds.width/6;
   int height = bounds.height;
   rgraph = new Rectangle(x, y, width, height);
   add(graph);
   graph.reshape(x, y, width, height);
}

private void initList() {
   int x = rgraph.x + rgraph.width+4;
   int y = bounds.y;
   int width = bounds.x + bounds.width - x;
   int height = bounds.height/4;
   rlist = new Rectangle(x, y, width, height);
   add(list);
   list.reshape(x, y, width, height);
   list.setFont(new Font("TimesRoman", Font.BOLD, 12));
}

private void initButtons() {
   int x = rlist.x;
   int y = rlist.y + rlist.height;
   int width = rlist.width;
   int height = 100;
   rcontrol = new Rectangle(x, y, width, height);
  
   int inset = 5;
   int side = 12;
   x = rcontrol.x + inset;
   y = rcontrol.y + inset;
   width = rcontrol.width - 2*inset;
   height = (rcontrol.height-2*inset)/buttons.length;
   
   for(int i=0; i<buttons.length; i++) {
      rbuttons[i] = new Rectangle(x, y+i*height, width, height);
      add(buttons[i]);
      buttons[i].reshape(x, y+(i+1)*height-side, side, side);
   }        
}

private void dbi(String s) {
   if(debug) System.out.println(s);
}
   
}