import gab.opencv.*;
import processing.video.*;
import java.awt.*;

PImage img;
PImage select;
PImage cur;

OpenCV opencv;
Capture cam;

int prevPositionX, prevPositionY, currPositionX, currPositionY;
int mode = -1; //mode 1 = s (select) mode 2 = c (copy) mode 3 = d (draw)
int select_ind = -1;

//store every dectected things
Rectangle[] hand;

//store the biggest hand
Rectangle bhand;


void setup() {
    size(1280, 480);

    img = loadImage("test.jpg");
    cur  = loadImage("cursor.png");
    stroke(255,10,0);

    opencv = new OpenCV(this, 640, 480);
    opencv.loadCascade("aGest.xml");
    cam = new Capture(this, 640, 480);
    cam.start();

    image(img, 0, 0, img.width, img.height);
    }


  void draw(){
  if (cam.available()==true) {
    cam.read();
  }

  opencv.loadImage(cam);
  hand = opencv.detect();

  pushMatrix();
  scale(-1.0, 1.0);
  image(cam, -1280, 0);
  popMatrix();

int handcount = -1;
int handsize = -1;

  //calculate the biggest hand
  for( int i=0; i < hand.length; i++ ) {
    if(handsize <  (hand[i].width * hand[i].height)){
      handsize = hand[i].width * hand[i].height;
      handcount = 1;
      bhand = hand[i];
    }
  }

  if(handcount > 0){
      rect(1280 - bhand.x, bhand.y, -bhand.width, bhand.height);
      noFill();

      //draw the position indicator
      image(cur, 480 - bhand.x, bhand.y, 16, 16);

      prevPositionX = currPositionX;
      prevPositionY = currPositionY;
      currPositionX = 480 - bhand.x + 4;
      currPositionY = bhand.y;

      //select mode
      if (mode == 1){
      }

      //copy mode
      else if (mode == 2){
      }

      //draw mode
      else if (mode == 3){
        line(prevPositionX,prevPositionY,currPositionX,currPositionY);
      }
  }
}


void keyPressed(){
    if(key=='s'||key=='S')
    mode = 1;

    else if(key=='c'||key=='C')
    mode = 2;

    else if(key=='d'||key=='D')
    mode = 3;

    else if(key=='i'||key=='I')
    image(img, 0, 0, img.width, img.height);
    }



void keyReleased(){
    if(select_ind > -1 && mode == 2){
    //to be done

    }

    mode = -1;
    }