contract_prop

Description:

contract prop

contract_prop #
Dependency Injection (DI) for widget properties, provide override contract from inherited scope.
Getting started #
Add package to your project flutter pub add any_to_widget
Implements ContractInterface for your contract. For example
class LabelContract with ContractInterface {
final String name;

LabelContract({this.name = 'foo bar'});

ContractProp<String> get label => ContractProp<String>(contract: (_) => name);
}
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Create widget, wrap your widget ContractPropBuilder
class ContractText extends StatelessWidget {
final String? text;

const ContractText({Key? key, this.text}) : super(key: key);

@override
Widget build(BuildContext context) {
return ContractPropBuilder<LabelContract>(
contract: LabelContract(),
builder: (_, contract) => Text(
text ?? contract.label.value(context) ?? '',
),
);
}
}
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Override contracts

class MyApp extends StatelessWidget {
const MyApp({Key? key}) : super(key: key);

@override
Widget build(BuildContext context) {
return MaterialApp(
builder: (_, child) {
return ContractScope(
contracts: [
LabelContract(name: 'Hello world'),
],
child: child!,
);
},
home: const Scaffold(body: Center(child: DemoPage())),
);
}
}
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Additional information #
See tests for more example