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Add UniqueComponent helper for creating components with unique states

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This commit is contained in:
Adam Barth 2015-09-25 15:27:15 -07:00
parent ff5676952e
commit e1b8f0b659
2 changed files with 17 additions and 0 deletions
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1
packages/flutter/lib/src/fn3.dart
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@ -47,5 +47,6 @@ export 'fn3/theme.dart';
export 'fn3/title.dart'; export 'fn3/title.dart';
export 'fn3/tool_bar.dart'; export 'fn3/tool_bar.dart';
export 'fn3/transitions.dart'; export 'fn3/transitions.dart';
export 'fn3/unique_component.dart';
export 'package:vector_math/vector_math.dart' show Matrix4; export 'package:vector_math/vector_math.dart' show Matrix4;

16
packages/flutter/lib/src/fn3/unique_component.dart Normal file
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@ -0,0 +1,16 @@
// Copyright 2015 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
import 'package:sky/src/fn3.dart';
abstract class UniqueComponent<T extends State> extends StatefulComponent {
UniqueComponent({ GlobalKey key }) : super(key: key ?? new GlobalKey());
T createState();
T get currentState {
GlobalKey globalKey = key;
return globalKey.currentState;
}
}