code: function(x, y){
              var pos = this.canvas.getBoundingClientRect(),
                  mx = x - pos.left,
                  my = y - pos.top;
              return this.pixelToTileCoords(mx, my);
          }
docs: Converts mouse pixel coords to map tile coords. Mouse pixel coords must be relative to the current window.
  @method mouseToTileCoords
  @param {Number} x - Mouse pixel x coord.
  @param {Number} y - Mouse pixel y coord.
  @return {Object|False} {x: 0, y: 0}