build method

@override Widget build(BuildContext context, Widget child, IndicatorController controller)

Function that builds the custom refresh indicator

Implementation

@override
Widget build(
  BuildContext context,
  Widget child,
  IndicatorController controller,
) {
  final Color backgroundColor = this.backgroundColor ??
      ProgressIndicatorTheme.of(context).refreshBackgroundColor ??
      Theme.of(context).canvasColor;

  return Stack(
    clipBehavior: Clip.hardEdge,
    children: <Widget>[
      scrollableBuilder(context, child, controller),
      _PositionedIndicatorContainer(
        edgeOffset: edgeOffset,
        displacement: displacement,
        controller: controller,
        child: Transform.scale(
          scale: controller.isFinalizing ? controller.value.clamp(0.0, 1.0) : 1.0,
          child: Container(
            width: 41,
            height: 41,
            margin: const EdgeInsets.all(4.0),
            child: Material(
              type: MaterialType.circle,
              clipBehavior: clipBehavior,
              color: backgroundColor,
              elevation: elevation,
              child: _InfiniteRotation(
                running: withRotation && controller.isLoading,
                child: builder(context, controller),
              ),
            ),
          ),
        ),
      ),
    ],
  );
}