boolean sliderActive = false;
ArrayList buttons = new ArrayList();
Slider distortSlider;

void mousePressed(){

  switch(whichButton()){

  case 0:  //swap
    reverse = !reverse;
     globalDistort = distortSlider.value;
    initialize();
    scaleShift();
    break; 
  case 2:  //toggle overlay
    showOverlay = !showOverlay;
    break; 
  case 1: //slider 
    sliderActive = true;
    println("slider active");
    break; 
    
     case 3: //SF 
     currMap = 0;
    globalDistort = distortSlider.value;
    initialize();
    scaleShift();
    break; 
      case 4: //LA
     currMap = 1;
    globalDistort = distortSlider.value;
    initialize();
    scaleShift();
    break; 
      case 5: //NY
     currMap = 2;
    globalDistort = distortSlider.value;
    initialize();
    scaleShift();
    break; 
      case 6: //Satellite
       reverse = false;
     currWarp = 0;
    globalDistort = distortSlider.value;
    initialize();
    scaleShift();
    break; 
 case 7: //Street
  reverse = false;
     currWarp = 1;
    globalDistort = distortSlider.value;
    initialize();
    scaleShift();
    break; 
     case 8: //neighborhood
     reverse = false;
     currWarp = 2;
    globalDistort = distortSlider.value;
    initialize();
    scaleShift();
    break; 
     case 9: //transit
     reverse = true;
    globalDistort = distortSlider.value;
    initialize();
    scaleShift();
    break; 
     case 10: //magnitude
     displacementsShown = !displacementsShown;
    break; 

  }
  //perform appropriate action
  // showOverlay = !showOverlay;
}

void mouseDragged(){
  if(sliderActive){
    distortSlider.move(mouseX);
    globalDistort = distortSlider.value;
    scaleShift();
  } 
}

int whichButton(){
  int toReturn = -1;
  for (int i=0;i<buttons.size();i++){
    Button b = (Button)buttons.get(i);
    if(mouseX>b.x1&&mouseX<b.x2&&mouseY>b.y1&&mouseY<b.y2){
      toReturn = i;
    }
  }
  return toReturn;
}


void mouseReleased(){
  if(sliderActive){
    sliderActive = false;
  } 
  
}

void setupButtons(){
  buttons.add(new Button("swap",29,390,141,420));//0
  buttons.add(new Button("slider",31,451,226,477));//1
  buttons.add(new Button("toggleOverlay",29,358,226,387));//2
  buttons.add(new Button("SF",29,130,202,150));//3
  buttons.add(new Button("LA",29,154,202,174));//4
  buttons.add(new Button("NY",29,180,202,200));//5
  buttons.add(new Button("satellite",29,242,202,262));//6
  buttons.add(new Button("street",29,266,202,286));//7
  buttons.add(new Button("neighborhood",29,290,202,311));//8
  buttons.add(new Button("transit",29,316,202,336));//9
    buttons.add(new Button("magnitude",29,480,202,540));
  distortSlider = new Slider(34,464,34,224);
}



void drawButtons(){
  for (int i=2;i<buttons.size();i++){
    ((Button)buttons.get(i)).active = false;
    if(i==2&&showOverlay){
      ((Button)buttons.get(i)).active = true;
    } else if (i<=5&&(i-3)==currMap){
       ((Button)buttons.get(i)).active = true;
    } else if (i<9&&(i-6)==currWarp&&!reverse) {
      ((Button)buttons.get(i)).active = true;
    } else if (i==9&&reverse){
      ((Button)buttons.get(i)).active = true;
    } else if (i==10&&displacementsShown){
      ((Button)buttons.get(i)).active = true;
    }
    ((Button)buttons.get(i)).draw();
  }
}