onIndexChanged property

void Function(int index, int crossAxisCount)? onIndexChanged

final

Called when the list scroll ends and returns the topmost index of the list.

If overlaySlivers or prefix are included, the bottom of those areas at a scroll offset of 0 is considered the top of the list.

crossAxisCount is the number of children along the horizontal axis in a GridView. For a ListView, it is 1.

Implementation

final void Function(int index, int crossAxisCount)? onIndexChanged;