INNER CODE UNIT · Dart

_MessageListViewState

fayeed/dash_chat · lib/src/message_listview.dart:83

class _MessageListViewState extends State<MessageListView> {
  double previousPixelPostion = 0.0;

  bool scrollNotificationFunc(ScrollNotification scrollNotification) {
    double bottom =
        widget.inverted ? 0.0 : scrollNotification.metrics.maxScrollExtent;

    if (scrollNotification.metrics.pixels == bottom) {
      if (widget.visible!) {
        widget.changeVisible!(false);
      }
    } else if ((scrollNotification.metrics.pixels - bottom).abs() > 100) {
      if (!widget.visible!) {
        widget.changeVisible!(true);
      }
    }
    return true;
  }

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