ObservableBase<T> class
abstract
A base class for observable should has value and can notify to observers
- Implementers
Constructors
- ObservableBase(Validator? _validator)
- Create an observable with validator
Properties
- error → String?
-
Error message if value invalid, otherwise is null
no setter
- hashCode → int
-
The hash code for this object.
no setterinherited
- hasListener → bool
-
Check there are listeners on this observable
no setter
- hasValidator → bool
-
Check has using validate value
no setter
- modified → bool
-
Check value has updated
no setter
- oldValue → T
-
The old value if has change
no setter
- peek → T
-
The current value but ignore check depend on in Computed context
no setter
- runtimeType → Type
-
A representation of the runtime type of the object.
no setterinherited
-
stream
→ Stream<
T> -
Create a broadcast stream to listen value changes.
no setter
- valid → bool
-
Validate status
no setter
- validStatus → ValidateStatus
-
Get current status of validating process
no setter
- value → T
-
The current value, if value called in a computed context,
it will set Computed is depend on this
no setter
Methods
-
call(
) → T -
changed(
Function callback) → Subscription - Listen on value changed then run callback
-
dispose(
) → void - Close stream (if used) and all listeners on this observable
-
listen(
Function callback) → Subscription - Listen on value changed then run callback, it also run callback in first time
-
noSuchMethod(
Invocation invocation) → dynamic -
Invoked when a nonexistent method or property is accessed.
inherited
-
notify(
) → void - Notify to observers are listen on this observable
-
setError(
String? msg) → void - Manual set error, used to update error message by validate outsite
-
toString(
) → String -
A string representation of this object.
override
Operators
-
operator ==(
Object other) → bool -
The equality operator.
inherited