title: snap.svg drag "real" position
body: <p>I want to drag a line to the element which I drag. for this I need the "real" position of the element while dragging.</p>
  
  <p>I tried this:</p>
  
  <pre><code>textSign.drag(function (dx, dy, posx, posy) {
      var myMatrix = new Snap.Matrix();
      myMatrix.translate(dx,dy); 
      this.transform(myMatrix.toTransformString());
  
      //drag another element
  
  }, function(x,y,event){
      //contains only mouse position
  }, function(){
      this.attr({x: parseFloat(this.attr("x")) + this.matrix.e, y: parseFloat(this.attr("y")) + this.matrix.f});
      this.transform('t0,0');
  });
  </code></pre>
  
  <p>Can I get the real position (of the matrix or sth) while moving?</p>