Property:

org.zkoss.zkmax.zul.FiledownloadListener.class

Default: none
[Since 3.5.0]

It specifies the name of the class that will be notified when a file download is happening. The class must implement the org.zkoss.zkmax.zul.FiledownloadListener interface.

A developer usually uses it to reject a download if the user tried to resume it in an unacceptable situation. For example, a developer can limit the user from downloading within the upcoming 24 hours.