pkg/observe/lib/observe.dart - Issue 26734004: use symbol literals instead of const ctor in packages

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Side by Side Diff: pkg/observe/lib/observe.dart

Issue 26734004: use symbol literals instead of const ctor in packages (Closed) Base URL: https://dart.googlecode.com/svn/branches/bleeding_edge/dart

Patch Set: Created 7 years, 2 months ago

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1 // Copyright (c) 2013, the Dart project authors. Please see the AUTHORS file	1 // Copyright (c) 2013, the Dart project authors. Please see the AUTHORS file

2 // for details. All rights reserved. Use of this source code is governed by a	2 // for details. All rights reserved. Use of this source code is governed by a

3 // BSD-style license that can be found in the LICENSE file.	3 // BSD-style license that can be found in the LICENSE file.

4	4

5 /**	5 /**

6 * Support for observing changes in model-view architectures.	6 * Support for observing changes in model-view architectures.

7 *	7 *

8 * Warning: This library is experimental, and APIs are subject to change.	8 * Warning: This library is experimental, and APIs are subject to change.

9 *	9 *

10 * This library is used to observe changes to [Observable] types. It also	10 * This library is used to observe changes to [Observable] types. It also

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38 * }	38 * }

39 *	39 *

40 * A more sophisticated approach is to implement the change notification	40 * A more sophisticated approach is to implement the change notification

41 * manually. This avoids the potentially expensive [Observable.dirtyCheck]	41 * manually. This avoids the potentially expensive [Observable.dirtyCheck]

42 * operation, but requires more work in the object:	42 * operation, but requires more work in the object:

43 *	43 *

44 * class Monster extends Unit with ChangeNotifierMixin {	44 * class Monster extends Unit with ChangeNotifierMixin {

45 * int _health = 100;	45 * int _health = 100;

46 * get health => _health;	46 * get health => _health;

47 * set health(val) {	47 * set health(val) {

48 * _health = notifyPropertyChange(const Symbol('health'), _health, val);	48 * _health = notifyPropertyChange(#health, _health, val);

49 * }	49 * }

50 *	50 *

51 * void damage(int amount) {	51 * void damage(int amount) {

52 * print('$this takes $amount damage!');	52 * print('$this takes $amount damage!');

53 * health -= amount;	53 * health -= amount;

54 * }	54 * }

55 *	55 *

56 * toString() => 'Monster with $health hit points';	56 * toString() => 'Monster with $health hit points';

57 * }	57 * }

58 *	58 *

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86 part 'src/change_notifier.dart';	86 part 'src/change_notifier.dart';

87 part 'src/change_record.dart';	87 part 'src/change_record.dart';

88 part 'src/compound_binding.dart';	88 part 'src/compound_binding.dart';

89 part 'src/list_path_observer.dart';	89 part 'src/list_path_observer.dart';

90 part 'src/observable.dart';	90 part 'src/observable.dart';

91 part 'src/observable_box.dart';	91 part 'src/observable_box.dart';

92 part 'src/observable_list.dart';	92 part 'src/observable_list.dart';

93 part 'src/observable_map.dart';	93 part 'src/observable_map.dart';

94 part 'src/path_observer.dart';	94 part 'src/path_observer.dart';

95 part 'src/to_observable.dart';	95 part 'src/to_observable.dart';

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