add a callback for notify Caller when the group changed

Dimibe / sticky_grouped_list

A ScrollablePositionedList in which items can be grouped into sections with sticky headers.

https://pub.dev/packages/sticky_grouped_list

MIT License

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add a callback for notify Caller when the group changed #73

Open fengwensheng opened 2 months ago

fengwensheng commented 2 months ago

It'll give the Caller a chance to known when group changed. In my case, I have a TabBar to display all the groups, and it need to keep sync with the ListView's group.