Signal class abstract base

StateBase 继承关系： Singal

• Store
• Value
• _List
• _Set
• _Map

Constructors

Signal({String debugLabel = ""})

name: The field name at: The declared type of this field

Properties

hashCode → int

The hash code for this object.

no setter, inherited

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

typeArgs → List<TypeHook>

为了解决外部json程序无法获知Signal内部范型的问题，实验了一个类型钩子， 貌似可以解决此问题，目前还没想到其他更简单的方案。 json处理比较复杂，而且和Signal核心逻辑无关，还是把json、yaml等处理放在state.dart外部， 这样就需要一些机制可以拿到Map List的范型类型，比如： Value

no setter

Methods

noSuchMethod(Invocation invocation) → dynamic

Invoked when a nonexistent method or property is accessed.

inherited

toString() → String

A string representation of this object.

inherited

Operators

operator ==(Object other) → bool

The equality operator.

inherited

Static Methods

track<T>({required T useSignal(), ValueChanged<Signal> onChanged = _defaultOnSignalDoNothing, ValueChanged<SignalSubscription> onConnected = _defaultOnConnectedImmediatelyClose}) → T

在客户程序Widget.build时，会有读操作，比如 Text("username: ${username.value}") Signal.watchRead在useSignalcallback执行期间打开一个封闭的瞬时作用域， 期间的Signal读操作会通知onRead，并用onChanged为key注册监听器