DropListener

/**
 * DropDropOnTarget demonstrates how to use a DropListener with
 * a dedicated target area when dragging and dropping an object
 * into your sketch.
 * code by andreas schlegel. http://www.sojamo.de/libraries/drop
*/

import sojamo.drop.*;

SDrop drop;

MyDropListener m;

void setup() {
  size(400,400);
  drop = new SDrop(this);
  m = new MyDropListener();
  drop.addDropListener(m);
}

void draw() {
  background(0);
  m.draw();
}


void dropEvent(DropEvent theDropEvent) {}


// a custom DropListener class.
class MyDropListener extends DropListener {
  
  int myColor;
  
  MyDropListener() {
    myColor = color(255);
    // set a target rect for drop event.
    setTargetRect(10,10,100,100);
  }
  
  void draw() {
    fill(myColor);
    rect(10,10,100,100);
  }
  
  // if a dragged object enters the target area.
  // dropEnter is called.
  void dropEnter() {
    myColor = color(255,0,0);
  }
  
  // if a dragged object leaves the target area.
  // dropLeave is called.
  void dropLeave() {
    myColor = color(255);
  }
  
  void dropEvent(DropEvent theEvent) {
    println("Dropped on MyDropListener");
  }
}