attach method

@override Widget? attach(BuildContext context, OptionViewBuilderController<T> controller)

Implementation

@override
Widget? attach(
  BuildContext context,
  OptionViewBuilderController<T> controller,
) {
  return controller.itemCount > 0
      ? Flex(
          direction: controller.orientation,
          crossAxisAlignment: CrossAxisAlignment.start,
          mainAxisAlignment: MainAxisAlignment.start,
          mainAxisSize: MainAxisSize.min,
          children: List.generate(controller.itemCount, (index) {
            var item = controller.items[index];
            var child = builder(item, index == controller.currentIndex);
            if (controller.isSpacer && controller.itemCount - 1 != index) {
              child = Flex(
                direction: controller.orientation,
                mainAxisSize: MainAxisSize.min,
                children: [
                  if (controller.isExpandable)
                    Flexible(fit: FlexFit.tight, child: child)
                  else
                    child,
                  SizedBox(
                    width: controller.isVerticalMode
                        ? null
                        : controller.spaceBetween,
                    height: controller.isVerticalMode
                        ? controller.spaceBetween
                        : null,
                  ),
                ],
              );
            }
            var root = GestureDetector(
              onTap: () => controller.onNotifyWithCallback(
                () {
                  if (controller.onItemClick != null) {
                    controller.onItemClick?.call(context, item);
                  }
                },
                index: index,
              ),
              child: AbsorbPointer(child: child),
            );
            return controller.isExpandable ? Expanded(child: root) : root;
          }),
        )
      : null;
}