frame

Description:

frame

frame #
A set of utilities that allow you to easily pass a data Model from a parent Widget down to it's descendants.
This Library provides two main classes:

The Provider Widget. If you need to pass a Store deep down your Widget hierarchy, you can wrap your Store in a Provider Widget. This will make the Model available to all descendant Widgets.
The StateWidget Widget. Use this Widget to find the appropriate Store in the Widget tree. It will automatically rebuild whenever the Model notifies that change has taken place.

Examples #

Counter App - Introduction to the tools provided by frame.

Usage #
Let's demo the basic usage with the all-time favorite: A counter example!
class Counter extends ChangeNotifier {
int value = 0;

void increment() {
value += 1;
notifyListeners();
}
}

class Store {
final counter = Counter();
}

main() => runApp(Provider(
store: Store(),
child: MyApp(),
));

class MyApp extends StatelessWidget {
@override
Widget build(BuildContext context) {
return MaterialApp(
title: 'Frame Demo',
theme: ThemeData(
primarySwatch: Colors.blue,
),
home: MyHomePage(),
);
}
}

class MyHomePage extends StatelessWidget {
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text('Frame Demo Home Page'),
),
body: Center(
child: Column(
mainAxisAlignment: MainAxisAlignment.center,
children: <Widget>[
Text('You have pushed the button this many times:'),
StateWidget(
state: (store) => store.counter,
builder: (context, child, counter) => Text(
'${counter.value.toString()}',
style: Theme.of(context).textTheme.display1,
),
),
],
),
),
floatingActionButton: FloatingActionButton(
onPressed: () =>
StateWidget.of(context, (store) => store.counter).increment(),
tooltip: 'Increment',
child: Icon(Icons.add),
),
);
}
}

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Contributors #

Hackett