onRelease(event) {
    if (new Date().valueOf() - this.touchTime > 10) {
      const pointer = this.getPointer(event.center);
      this.selectionHandler.generateClickEvent("release", event, pointer);
      // to avoid double fireing of this event because we have two hammer instances. (on canvas and on frame)
      this.touchTime = new Date().valueOf();
    }
  }
handle the release of the screen
@param {Event} event
@private