Selector.pde

class Selector{
  PShape selection;
  float startX,startY, endX, endY;
  boolean selecting, animating;
  int select_mode;
  float a,b,radius;
  
  Selector(){
    selecting = false;
    animating = false;
    a = 0;
    b = 0;
    select_mode = 1;
    endX = -1;
    endY = -1;     
    selection = createShape(RECT,-1,-1,-1,-1);
  }
  
  void setSelectMode(int mode){
    select_mode = mode;
  }
  
  void startSelection(){
    selecting = true;
    startX = mouseX;
    startY = mouseY;
    if(select_mode == 3){
      animating = true;
    }
}
  
  void resetSelection(){
    selecting = false;
    startX = -1;
    startY = -1;
    endX = -1;
    endY = -1;    
    a = 0;
    b = 0;
   
  }
  
  void stretchSelection(){
    if(selecting){
      endX = mouseX-startX;
      endY = mouseY-startY;
    }
  }

  void draw(){
    if(selecting){
      switch(select_mode){
        case 1:  selection = createShape(RECT,startX,startY,endX,endY);
                 break;
        case 2:  a = mouseX-startX;
                 b = mouseY-startY;
                 radius = sqrt(a*a+b*b);
                 ellipseMode(RADIUS);
                 selection = createShape(ELLIPSE,startX,startY,radius,radius);
                 line(startX,startY,mouseX,mouseY);
                 break;
        case 3:  if(animating){neighborAnimation();}
      }
      selection.setStroke(true);
      selection.setFill(color(251, 255, 20, 100));
      shape(selection);
    }
  }
  
  void neighborAnimation(){
    int i;
    int t = millis();
    int pointRadius = 5;
    for(i=0;i<5;i++){
        background(240);
        //println("done\n");
        ellipseMode(RADIUS);
        selection = createShape(ELLIPSE,startX,startY,pointRadius,pointRadius);
        selection.setStroke(true);
        selection.setFill(color(251, 255, 20, 100));
        shape(selection);
        pointRadius += 10;
        while(millis()-t < 1000){
        }
        t = millis();
    }
    animating = false;
  }  
}