computeMaxScrollOffset method

  1. @override
double computeMaxScrollOffset (int childCount)
override

The scroll extent needed to fully display all the tiles if there are childCount children in total.

The child count will never be null.

Implementation 

@override
double computeMaxScrollOffset(int childCount) {
  assert(childCount != null);
  final int mainAxisCount = ((childCount - 1) ~/ crossAxisCount) + 1;
  final double mainAxisSpacing = mainAxisStride - childMainAxisExtent;
  return mainAxisStride * mainAxisCount - mainAxisSpacing;
}