onFetchData property

VoidCallback onFetchData

final

The callback method that's called whenever the list is scrolled to the end (meaning the top when reverse is true, or the bottom otherwise).

In normal operation, this method should trigger new data to be fetched and isLoading to be set to true.

Exactly when this is called depends on the cacheExtent. Additionally, every call to this will be debounced by the provided debounceDuration.

Is required and cannot be null.

Implementation

final VoidCallback onFetchData;