getCrossAxisCount method
Return crossAxisCount
by SliverWaterfallFlowDelegateWithFixedCrossAxisCount
and SliverWaterfallFlowDelegateWithMaxCrossAxisExtent.
Implementation
@override
int getCrossAxisCount(SliverConstraints constraints) {
return (constraints.crossAxisExtent /
(maxCrossAxisExtent + crossAxisSpacing))
.ceil();
}