updateRenderBoxModelWithOverflowY method

void updateRenderBoxModelWithOverflowY(
  1. ScrollListener scrollListener
)

Implementation

void updateRenderBoxModelWithOverflowY(ScrollListener scrollListener) {
  if (renderBoxModel is RenderSliverListLayout) {
    RenderSliverListLayout renderBoxModel = this.renderBoxModel as RenderSliverListLayout;
    renderBoxModel.scrollOffsetY = renderBoxModel.axis == Axis.vertical ? renderBoxModel.scrollable.position : null;
  } else if (renderBoxModel != null) {
    RenderBoxModel renderBoxModel = this.renderBoxModel!;
    CSSOverflowType overflowY = renderStyle.effectiveOverflowY;
    switch (overflowY) {
      case CSSOverflowType.clip:
        _scrollableY = null;
        break;
      case CSSOverflowType.hidden:
      case CSSOverflowType.auto:
      case CSSOverflowType.scroll:
        // If the render has been offset when previous overflow is auto or scroll, _scrollableY should not reset.
        if (_scrollableY == null) {
          _scrollableY = WebFScrollable(
              axisDirection: AxisDirection.down,
              scrollListener: scrollListener,
              overflowType: overflowY,
              currentView: renderStyle.currentFlutterView);
          renderBoxModel.scrollOffsetY = _scrollableY!.position;
        }
        // Reset canDrag by overflow because hidden is can't drag.
        bool canDrag = overflowY != CSSOverflowType.hidden;
        _scrollableY!.overflowType = overflowY;
        _scrollableY!.setCanDrag(canDrag);
        break;
      case CSSOverflowType.visible:
      default:
        _scrollableY = null;
        break;
    }

    renderBoxModel.scrollListener = scrollListener;
    renderBoxModel.scrollablePointerListener = _scrollablePointerListener;
  }
}