generic type in flutter

Halil Develi answered on September 26, 2022 Popularity 9/10 Helpfulness 4/10

answer generic type in flutter

related generic in dart

generic type in flutter

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import 'package:flutter/material.dart';
import 'package:get_it/get_it.dart';
import 'package:provider/provider.dart';

class StateFullConsumerWidget<T extends ChangeNotifier> extends StatefulWidget{

  StateFullConsumerWidget({@required this.builder,Key key,this.onPostViewModelInit,this.child}) : super(key : key);

  final Widget Function(BuildContext context, ChangeNotifier value, Widget child) builder;
  final Widget child;

  final void Function(T) onPostViewModelInit;

  @override
  _StateFullConsumerWidgetState<T> createState() => _StateFullConsumerWidgetState<T>();
}

class _StateFullConsumerWidgetState<T extends ChangeNotifier> extends State<StateFullConsumerWidget>{
  T _viewModel;
  @override
  void initState() {
    // assign the model once when state is initialised
    _viewModel = GetIt.instance.get<T>();
    widget.onPostViewModelInit(_viewModel);


    super.initState();
  }
  @override
  Widget build(BuildContext context) {
    return ChangeNotifierProvider<T>(
      builder: (context) => _viewModel,
      child: Consumer<T>(
        builder: widget.builder,
        child: widget.child,
      ),
    );
  }

}

Popularity 9/10 Helpfulness 4/10 Language dart

Source: stackoverflow.com

Tags: dart flutter

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Contributed on Sep 26 2022

Halil Develi

0 Answers Avg Quality 2/10

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generic in dart

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// example of using generics in Dart

class Box<T> {
  T value;

  Box(this.value);

  T getValue() {
    return value;
  }

  void setValue(T newValue) {
    value = newValue;
  }
}

void main() {
  // creating an instance of Box with int as the generic type
  Box<int> intBox = Box<int>(10);
  print(intBox.getValue()); // output: 10

  // creating an instance of Box with String as the generic type
  Box<String> stringBox = Box<String>("Hello");
  print(stringBox.getValue()); // output: Hello
}

Popularity 9/10 Helpfulness 4/10 Language dart

Source: Grepper

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Contributed on Sep 11 2023

YOU.com

0 Answers Avg Quality 2/10

generic type in flutter

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generic type in flutter

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