buildBuilder method

Implementation

@override
Widget? buildBuilder() {
  if (currentIndex < 0) {
    return null;
  }

  var item = widget.items[currentIndex];

  return AntdBox(
    onLayout: (ctx) {
      bool isOpen = contentRenderBox != null;
      if (contentRenderBox == null || ctx.hasSizeChange) {
        contentRenderBox = ctx.renderBox;
        if (!isOpen) {
          openAnimation();
          setState(() {});
        }
      }
    },
    child: Column(
      mainAxisSize: MainAxisSize.min,
      children: [
        AntdBox(
          style: style.itemStyle,
          child: item.item(close, this),
        ),
        if (widget.extra != null)
          AntdBox(
            style: style.extraStyle,
            child: widget.extra?.call(close, this),
          )
      ],
    ),
  );
}