Extend or override backdropview about floatingpanel HOT 5 OPEN

  
  public var dismissalTapGestureRecognizer: UITapGestureRecognizer!
  
  public var notification: Notification.Name?
  public var presentingViewcontroller: UIViewController?
  
  override public func hitTest(_ point: CGPoint, with event: UIEvent?) -> UIView? {
    // little hack to fire back to the floatingpanel controller an extra action, like dismiss the floating panel
    // and at the same time let the event be trig in the presented viewcontroller
    if let pvc = presentingViewcontroller {
      if let n = notification {
        NotificationCenter.default.post(name: n, object: nil)
      }
      
      return pvc.view.hitTest(point, with: event)
    }

    // 1
    if !self.isUserInteractionEnabled || self.isHidden || self.alpha == 0 {
      return nil
    }
    //2
    var hitView: UIView? = self
    if !self.point(inside: point, with: event) {
      if self.clipsToBounds {
        return nil
      } else {
        hitView = nil
      }
    }
    //3
    for subview in self.subviews.reversed() {
      let insideSubview = self.convert(point, to: subview)
      if let sview = subview.hitTest(insideSubview, with: event) {
        return sview
      }
    }
    
    return hitView
  }
}