createState method
Creates the mutable state for this widget at a given location in the tree.
Subclasses should override this method to return a newly created instance of their associated State subclass:
@override
State<SomeWidget> createState() => _SomeWidgetState();
The framework can call this method multiple times over the lifetime of
a StatefulWidget. For example, if the widget is inserted into the tree
in multiple locations, the framework will create a separate State object
for each location. Similarly, if the widget is removed from the tree and
later inserted into the tree again, the framework will call createState
again to create a fresh State object, simplifying the lifecycle of
State objects.
Implementation
@override
// ignore: no_logic_in_create_state
State<StatefulWidget> createState() {
List<Map<String, String>> jsonList = countryList;
List<CountryCode> elements =
jsonList.map((json) => CountryCode.fromJson(json)).toList();
if (comparator != null) {
elements.sort(comparator);
}
if (countryFilter != null && countryFilter!.isNotEmpty) {
final uppercaseCustomList =
countryFilter!.map((criteria) => criteria.toUpperCase()).toList();
elements = elements
.where((criteria) =>
uppercaseCustomList.contains(criteria.code) ||
uppercaseCustomList.contains(criteria.name) ||
uppercaseCustomList.contains(criteria.dialCode))
.toList();
}
return CountryCodePickerState(elements);
}