TypeError: this.data.getLocalPosition is not a function

[nana]

Hello, So i have some problems with my code, i wanted to drag some objects but i have this error!

This is my code

poisson.mousemove = function(data)
  {  if (this.dragging)
    {  var newPosition = this.data.getLocalPosition(this.parent);
     this.position.x = newPosition.x ;
     this.position.y = newPosition.y ;
    } ;
  };

and when i try to drag my object i have this error

TypeError: this.data.getLocalPosition is not a function

Some help! Thank you!

[ivan.popelyshev]

Is that pixi.js? then its

function(event) {

    event.data.getLocalPosition(...)

}

[nana]

Thanx!