getLayout method

  1. @override
SliverGridLayout getLayout(
  1. SliverConstraints constraints
)
override

Returns information about the size and position of the tiles in the grid.

Implementation

@override
SliverGridLayout getLayout(SliverConstraints constraints) {
  final double usableCrossAxisExtent =
      constraints.crossAxisExtent - crossAxisSpacing * (crossAxisCount - 1);
  final double childCrossAxisExtent = usableCrossAxisExtent / crossAxisCount;
  final double childMainAxisExtent = childCrossAxisExtent / childAspectRatio;
  return SliverGridRegularTileLayoutAndLoading(
      crossAxisCount: crossAxisCount,
      mainAxisStride: childMainAxisExtent + mainAxisSpacing,
      crossAxisStride: childCrossAxisExtent + crossAxisSpacing,
      childMainAxisExtent: childMainAxisExtent,
      childCrossAxisExtent: childCrossAxisExtent,
      reverseCrossAxis:
          axisDirectionIsReversed(constraints.crossAxisDirection),
      fullCrossAccessExtent: usableCrossAxisExtent,
      itemCount: this.itemCount);
}