saliouseck2009

FocusManager.instance.primaryFocus?.unfocus()
 #use cases 
return GestureDetector(
      onTap: () => FocusManager.instance.primaryFocus?.unfocus(),
      child: Scaffold(
        appBar: AppBar(
          title: Text('Login'),
        ),
        body: Body(),
      ),

saliouseck2009

TextEditingController controller = TextEditingController();



TextField(
  keyboardType: TextInputType.number,
  textCapitalization: TextCapitalization.sentences,
  textAlign: TextAlign.center,
  style: TextStyle(color: Colors.red, fontWeight: FontWeight.w300),

saliouseck2009

Material(
  elevation: 10,
  borderRadius: BorderRadius.all(Radius.circular(50)),
  child: Container(
    height: 100,
    width: 200,
    decoration: BoxDecoration(
      color: Colors.amber,
      borderRadius: BorderRadius.all(Radius.circular(50)),
    ),

saliouseck2009

#division entière
int n = 7 ~/ 3;
résult by excess
int exces = (7/3).ceil();
result by default
int dfault = (7/3).floor();
print(n);
print(exces);
print(dfault);

saliouseck2009

double num1 = double.parse((12.3412).toStringAsFixed(2));
// 12.34

double num2 = double.parse((12.5668).toStringAsFixed(2));
// 12.57

double num3 = double.parse((-12.3412).toStringAsFixed(2));
// -12.34

double num4 = double.parse((-12.3456).toStringAsFixed(2));

saliouseck2009

void main() {
  runApp(
    BlocProvider(
      create: (context) => MyBloc(),
      child: MyApp(),
    ),
  );
}

@immutable

saliouseck2009

class SimpleBlocObserver extends BlocObserver {
  @override
  void onEvent(Bloc bloc, Object? event) {
    super.onEvent(bloc, event);
    print(event);
  }

  @override
  void onTransition(Bloc bloc, Transition transition) {
    super.onTransition(bloc, transition);

saliouseck2009

typedef Int2VoidFunc = void Function(int);
// or: typedef void Int2VoidFunc(int arg);
class MyOtherClass {
  final Int2VoidFunc callback;
  MyOtherClass(this.callback);
  void callCallaback() { callback(5); }
}

saliouseck2009

//Set the value if it doesn't
//You may be tempted to implement some conditional logic to handle this:

class ShoppingCart {
  final Map<String, int> items = {};

  void add(String key, int quantity) {
    if (items.containsKey(key)) {
      // item exists: update it
      items[key] = quantity + items[key]!;

saliouseck2009

Stack(
        children: [
          Center(
              child: Container(
            height: 200,
            width: 200,
            decoration: new BoxDecoration(
              borderRadius: BorderRadius.circular(20.0),
            ),
            child: FlutterLogo(),