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only calling scroll listener when required #217

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only calling scroll listener when required #217

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3 changes: 2 additions & 1 deletion lib/grouped_list.dart
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Original file line number Diff line number Diff line change
Expand Up @@ -314,9 +314,10 @@ class _GroupedListViewState<T, E> extends State<GroupedListView<T, E>> {
var isSeparator = widget.reverse ? (int i) => i.isOdd : (int i) => i.isEven;
isValidIndex(int i) => i >= 0 && i < _sortedElements.length;

if (widget.useStickyGroupSeparators) {
_ambiguate(WidgetsBinding.instance)!.addPostFrameCallback((_) {
_scrollListener();
});
});}

/// The itemBuilder function for this package divides the [index] by two
/// because between each element a separator is displayed. Depending on the
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