39 lines
754 B
Dart
39 lines
754 B
Dart
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import "package:flutter/material.dart";
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class IndexOfStackNotifier with ChangeNotifier {
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int _index = 0;
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bool _isSearchQueryEmpty = true;
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bool _isSearchResultsEmpty = true;
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static IndexOfStackNotifier? _instance;
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IndexOfStackNotifier._();
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factory IndexOfStackNotifier() => _instance ??= IndexOfStackNotifier._();
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set isSearchQueryEmpty(bool value) {
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_isSearchQueryEmpty = value;
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setIndex();
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}
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set isSearchResultsEmpty(bool value) {
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_isSearchResultsEmpty = value;
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setIndex();
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}
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setIndex() {
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if (_isSearchResultsEmpty) {
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if (_isSearchQueryEmpty) {
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_index = 0;
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} else {
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_index = 2;
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}
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} else {
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_index = 1;
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}
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notifyListeners();
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}
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get index => _index;
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}
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