start (event) {
      if (!disabled && !Glide.disabled) {
        this.disable()

        const swipe = this.touches(event)

        swipeSin = null
        swipeStartX = toInt(swipe.pageX)
        swipeStartY = toInt(swipe.pageY)

        this.bindSwipeMove()
        this.bindSwipeEnd()

        Events.emit('swipe.start')
      }
    }
Handler for `swipestart` event. Calculates entry points of the user's tap.

@param {Object} event
@return {Void}