Menu.pde

class Menu{
  ArrayList<Button> _buttonList;
  Selector _selector; 
  Menu(){
    _selector = new Selector();
    _buttonList = new ArrayList<Button>();
    makeButtons();
  }
  
  void activate(int button){ _selector.setSelectMode(button); }
  
  void makeButtons(){
   _buttonList.add(new Button(0,0,0)); //adds the first button
   for( int i = 1; i < 4; i++){ _buttonList.add(new Button(0,i*25+1,i)); }
  }
  
  int onaButton(int x, int y){
    int i;
    for( i = 0; i < 4; i++){ //loop checks if any button was clicked
      if(_buttonList.get(i).isInside(x,y)) { return i; } //and returns the _id if one was in fact clicked
    }
    return 99;
  }

  void draw(){
    pushStyle();
    for(int i=0; i<4; i++){ _buttonList.get(i).draw(); }
    popStyle();
    _selector.draw();
  }
  
  void mousePressed(){
    int button = onaButton(mouseX,mouseY);  //which button is selected
    if( button != 99 ){ activate(button); } //99 is an arbitrary invalid button _id
    else{ _selector.mousePressed(); }
  }
  
  void mouseDragged(){ _selector.stretchSelection(); }
  void mouseReleased(){ _selector.resetSelection(); }
}

class Button{
 int _x1, _y1, _x2, _y2, _id;
  Button(int x,int y, int id){
   _x1 = x;
   _y1 = y;
   _x2 = 60;
   _y2 = 24;
   _id = id;
  } 
  
  boolean isInside(int x, int y){
    if( x>=_x1 && x<=_x2 && y>_y1 && y<=_y1+_y2){ return true; }
    else{ return false; }
  }
  
  void draw(){
      rect(_x1,_y1,_x2,_y2,0,7,7,0);//basic button shape
      switch(_id){
       case 0: rect(_x1+_x2/2,_y1+5,10,10);//rect icon
       break;
       case 1: ellipseMode(CORNER);
               //ellipse(0.0,26.0,60.0,25.0);//circle icon
       break;
       case 2: //ellipse(0.0,52.0,60.0,25.0);//NN icon
       break;
       case 3:
       break;
       default:
     }
   }
}