buildSlivers method
- @override
override
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 = MediaQuery(
data: mediaQuery.copyWith(
padding: scrollDirection == Axis.vertical
? mediaQueryHorizontalPadding
: mediaQueryVerticalPadding,
),
child: sliver,
);
}
}
if (effectivePadding != null)
sliver = SliverPadding(padding: effectivePadding, sliver: sliver);
return <Widget>[ sliver ];
}