init method

Implementation

void init() {
  textColor = widget.textColor ?? Colors.grey[600];
  _searchList = <T>[];
  textController = widget.controller ?? textController;
  notifier = ValueNotifier(null);
  _focusNode = FocusNode();
  isFocused = false;
  _list = List<T>.from(widget.searchList);
  _searchList.addAll(_list);
  _focusNode.addListener(() {
    if (!_focusNode.hasFocus) {
      textController.clear();

      overlaySearchList?.remove();

      overlaySearchList = null;
    } else {
      _searchList
        ..clear()
        ..addAll(_list);
      if (overlaySearchList == null) {
        onTextFieldFocus(
            circularIndicatorColor: widget.circularProgressIndicatorColor);
      } else {
        overlaySearchList?.markNeedsBuild();
      }
    }
  });
  textController.addListener(() async {
    final text = textController.text;
    if (text.trim().isNotEmpty) {
      isLoading = true;
      _searchList.clear();
      final List<T?> filterList =
          await widget.searchQueryBuilder(text, widget.searchList);
      _searchList.clear();
      _searchList.addAll(filterList);
      isLoading = false;

      if (overlaySearchList == null) {
        onTextFieldFocus(
            circularIndicatorColor: widget.circularProgressIndicatorColor);
      } else {
        overlaySearchList?.markNeedsBuild();
      }
    } else {
      _searchList
        ..clear()
        ..addAll(_list);
      if (overlaySearchList == null) {
        onTextFieldFocus(
            circularIndicatorColor: widget.circularProgressIndicatorColor);
      } else {
        overlaySearchList?.markNeedsBuild();
      }
    }
  });
}