buildSlivers method

  1. @override
List<Widget> buildSlivers (BuildContext context)

Build the list of widgets to place inside the viewport.

Subclasses should override this method to build the slivers for the inside of the viewport.

Implementation

@override
List<Widget> buildSlivers(BuildContext context) {
  Widget sliver = buildChildLayout(context);
  EdgeInsetsGeometry effectivePadding = padding;
  if (padding == null) {
    final MediaQueryData mediaQuery = MediaQuery.of(context, nullOk: true);
    if (mediaQuery != null) {
      // Automatically pad sliver with padding from MediaQuery.
      final EdgeInsets mediaQueryHorizontalPadding =
          mediaQuery.padding.copyWith(top: 0.0, bottom: 0.0);
      final EdgeInsets mediaQueryVerticalPadding =
          mediaQuery.padding.copyWith(left: 0.0, right: 0.0);
      // Consume the main axis padding with SliverPadding.
      effectivePadding = scrollDirection == Axis.vertical
          ? mediaQueryVerticalPadding
          : mediaQueryHorizontalPadding;
      // Leave behind the cross axis padding.
      sliver = new MediaQuery(
        data: mediaQuery.copyWith(
          padding: scrollDirection == Axis.vertical
              ? mediaQueryHorizontalPadding
              : mediaQueryVerticalPadding,
        ),
        child: sliver,
      );
    }
  }

  if (effectivePadding != null)
    sliver = new SliverPadding(padding: effectivePadding, sliver: sliver);
  return <Widget>[ sliver ];
}