triggerMode property Null safety
final
Defines how this RefreshIndicator can be triggered when users overscroll.
The RefreshIndicator can be pulled out in two cases, 1, Keep dragging if the scrollable widget at the edge with zero scroll position when the drag starts. 2, Keep dragging after overscroll occurs if the scrollable widget has a non-zero scroll position when the drag starts.
If this is RefreshIndicatorTriggerMode.anywhere, both of the cases above can be triggered.
If this is RefreshIndicatorTriggerMode.onEdge, only case 1 can be triggered.
Defaults to RefreshIndicatorTriggerMode.onEdge.
Implementation
final RefreshIndicatorTriggerMode triggerMode;